RuSciBench chinese
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目的探讨脑~(18)F-FDG PET/ CT对MRI阴性难治性癫痫患者术前致痫灶定位的价值。方法回顾性分析2014年1月至2020年6月间于暨南大学附属第一医院接受术前脑~(18)F-FDG PET/ CT-MRI检查的55例[男38例、女17例,年龄(20.0±8.1)岁]MRI阴性癫痫患者的临床资料(550个脑叶)。以立体定向脑电图(SEEG)及术后随访至少1年的结果作为参考标准,分别计算~(18)F-FDG PET/ CT、视频脑电图(VEEG)、PET/ CT+VEEG及PET/ CT-VEEG对致痫灶定位的灵敏度、特异性、准确性、阳性预测值(PPV)及阴性预测值(PPV)。使用χ~2检验对单脑叶、多脑叶及全部患者不同检查... | Objective To evaluate the value of ~(18)F-FDG PET/ CT for preoperative localization of epileptogenic foci in refractory epilepsy patients with negative MRI. Methods Clinical data (550 lobes) of 55 epilepsy patients (38 males, 17 females, age (20.0±8.1) years) with negative MRI who underwent preoperative ~(18)F-FDG PET/... |
目的探索~(18)F-FDG PET/ MR在难治性癫痫精准定位诊断中的价值。方法回顾性纳入2019年2月至2021年12月在上海交通大学医学院附属瑞金医院确诊为难治性癫痫患者81例[男52例、女29例,年龄(30.0±10.9)岁],所有患者行术前一体化PET/ MR检查,并结合PET/ MR定位定侧的结果进行立体定向脑电图(SEEG)电极植入,记录癫痫发作部位。确定致痫灶后行手术,术后2年随访Engel分级。通过χ~2检验比较MRI与PET/ MR成像对致痫灶的检出率,并比较PET/ MR对颞叶癫痫(TLE)及颞叶外癫痫(ETLE)致痫灶检出率。结果MRI正确定位致痫灶38例,检出率为46.91%(38/81);PET/ MR成... | Objective To analyze the clinical value of ~(18)F-FDG PET/ MR for precise localization of epileptogenic foci in patients with refractory epilepsy. Methods From February 2019 to December 2021, 81 patients (52 males, 29 females; age (30.0±10.9) years) with refractory epilepsy confirmed in Ruijin Hospital Shanghai Jiao To... |
目的分析~(18)F-FDG PET在颞叶外癫痫(ETLE)患者术前评估中的应用价值,并探讨提高其定位准确性的改进方法。方法纳入2006年1月至2022年11月间于北京协和医院行手术治疗、最终证实致痫灶位于颞叶外的41例患者[男25例、女16例,年龄(22.7±7.5)岁],采用视觉及半定量方法回顾性分析其术前独立~(18)F-FDG PET显像,以及~(18)F-FDG PET与MRI联合应用对致痫灶检出的准确性,及对治疗决策的影响。采用Fisher确切概率法分析数据。结果41例患者中,独立~(18)F-FDG PET视觉分析发现40例颞叶外脑部代谢异常,其中26例为单一部位的局灶性代谢异常,定位为致痫灶;14例为多灶性代谢异常,... | Objective To analyze the application value of ~(18)F-FDG PET in the preoperative evaluation of patients with extratemporal lobe epilepsy (ETLE) and explore improved methods to enhance its localization accuracy. Methods A total of 41 patients (25 males, 16 females, age (22.7±7.5) years) who underwent surgery and ultimat... |
目的探讨~(18)F-FDG PET/ CT显像在癫痫发作且MRI阴性的疑似自身免疫性脑炎(AE)患儿中的诊断价值。方法回顾性分析2019年5月至2022年8月期间在上海交通大学医学院附属新华医院有癫痫发作症状且MRI阴性的94例临床疑似AE患儿(男49例、女45例;年龄1~ 15岁)。所有患儿行~(18)F-FDG PET/ CT脑显像,按临床最终诊断分为AE组与非AE组,并评估其~(18)FFDG PET/ CT视觉诊断的效能。评估所有患儿皮质病灶范围评分(S),测量皮质病灶(L)、基底节(B)和丘脑(T)的SUV_(max)、SUVmean和最小SUV(SUVmin ),获得L/ B、L/ T的各SUV比值(SUVR)。采用两... | Objective To investigate the value of ~(18)F-FDG PET/ CT imaging in the diagnosis of suspected autoimmune encephalitis (AE) in children with epilepsy and negative MRI. Methods From May 2019 to August 2022, 94 suspected AE children (49 males, 45 females; age 1-15 years) with epilepsy and negative MRI who underwent brain... |
目的基于深度残差神经网络(ResNet)分析术前~(18)F-FDG PET影像及患者临床特征,预测难治性颞叶癫痫(TLE)患者术后复发状况。方法回顾性分析2014年1月至2020年6月期间暨南大学附属第一医院诊治的220例难治性TLE患者[男132例、女88例,年龄23.0(20.0,30.2)岁]的术前~(18)F-FDG PET影像及临床资料。采用ResNet对预处理好的PET图像及临床特征进行高通量特征提取,并进行区分TLE患者的术后复发预测任务。评估模型的预测性能,并将其ROC曲线分析所得AUC与经典的生存分析Cox比例风险模型的AUC进行比较(Delong检验)。结果基于PET影像联合临床特征,ResNet预测难治性TL... | Objective To predict the short-term postoperative recurrence status of patients with refractory temporal lobe epilepsy (TLE) by analyzing preoperative ~(18)F-FDG PET images and patients' clinical characteristics based on deep residual neural network (ResNet). Methods Retrospective analysis was conducted on preoperative... |
目的比较Al18F-1,4,7-三氮杂环壬烷-1,4,7-三乙酸(NOTA)-成纤维细胞激活蛋白抑制剂(FAPI)-04与~(18)F-FDG PET/ CT在初诊胃癌中的应用。方法前瞻性纳入2021年3月至2022年7月间郑州大学第一附属医院初诊胃癌的患者20例(男13例、女7例,年龄:27~77岁),患者均于1周内完成~(18)F-FDG及Al~(18)F-NOTA-FAPI-04 PET/ CT显像。比较2种方法的SUV_(max)、肿瘤与背景比(TBR)和阳性检出率(Wilcoxon符号秩检验、McNemar χ~2检验)。结果Al~(18)F-NOTA-FAPI-04在胃癌原发灶的SUV_(max)及TBR均明显高于~(1... | Objective To compare Al~(18)F-1, 4, 7-trizacyclononane-1, 4, 7-triacetic acid (NOTA)fibroblast activation protein inhibitor (FAPI)-04 PET/ CT with ~(18)F-FDG PET/ CT in the evaluation of patients with initial gastric cancer. Methods Twenty patients (13 males, 7 females, age: 27-77 years) with histologically proven gast... |
目的探讨~(99)Tc~m-联肼尼克酰胺(HYNIC)-前列腺特异膜抗原(PSMA)SPECT/ CT显像在前列腺癌(PCa)生化复发中的价值。方法回顾性分析2018年1月至2023年3月间于河南省人民医院行~(99)Tc~m-HYNIC-PSMA SPECT/ CT显像且资料完整的112例PCa生化复发患者[年龄(72.6± 6.1)岁]。根据前列腺特异抗原(PSA)水平分为0.2 μg/ L | Objective To investigate the value of ~(99)Tc~m-hydrazinonicotinamide (HYNIC)-prostate specific membrane antigen (PSMA) SPECT/ CT imaging in biochemical recurrence of prostate cancer (PCa). Methods From January 2018 to March 2023, 112 patients with biochemical recurrence of PCa (age (72.6±6.1) years) who underwent ~(99... |
心肌纤维化是多种心血管疾病发生发展的重要病理过程,与患者预后密切相关。活化的成纤维细胞(CFs)是其中主要的效应细胞,其表面特异性高表达成纤维细胞激活蛋白(FAP)。核素标记的FAP抑制剂(FAPIs)能与FAP特异性结合,在体可视化活化的CFs,在多种心血管疾病的早期诊断、预后预测及干预指导中表现出初步的临床应用价值。该文就核素标记的FAPIs在心血管疾病显像中的研究进展进行综述。 | Myocardial fibrosis is an important pathological process in the development of cardiovascular diseases, which is closely related to the prognosis of patients. Activated cardiac fibroblasts (CFs) are the main effector cells, whose surface specifically overexpress fibroblast activation protein (FAP). Radionuclide-labeled... |
双显像剂PET显像能够为疾病诊断提供更为全面的临床信息。如何通过单次显像实现双显像剂显像是当前核医学领域研究热点,其核心技术问题是在混合显像剂信号中准确分离出单一显像剂信息。近20年来,不同显像剂的分离方法不断被提出,2种显像剂之间的注射间隔也在不断缩短。该文对近年来提出的双显像剂分离技术进行汇总,介绍了代表性技术的实现手段,总结了各种方法的优势,并展望其发展方向。 | Dual-tracer PET imaging can provide more comprehensive clinical information for disease diagnosis. How to achieve dual-tracer imaging through single imaging session is one of the hot topics in the field of nuclear medicine. The key issues in achieving dual-tracer imaging with a single scan is the accurate separation of... |
口腔颌面部恶性肿瘤威胁患者生命健康,严重影响患者的吞咽、语言功能和面容。其治疗方法中,~(125)I粒子近距离照射治疗技术因手术创伤小,靶区组织剂量大分布均匀,对周边正常组织损伤小,可以减少医护人员辐射暴露等优点,受到广泛关注。利用~(125)I粒子对口腔颌面部肿瘤进行持续、低剂量的近距离照射治疗,可以有效减小肿瘤体积,延长患者的生存期,治疗效果显著。该文针对~(125)I粒子近距离照射在口腔颌面部恶性肿瘤的临床应用展开综述。 | Oral and maxillofacial malignant tumors threaten the life and health of patients, and seriously affect their swallowing, language function and face. ~(125)I seeds brachytherapy for oral and maxillofacial malignant tumors has been widely concerned and studied because of its advantages such as less surgical trauma, large... |
地表形变危害巨大且深远,利用合成孔径雷达干涉测量(interferometric synthetic aperture radar,InSAR)技术监测地表形变虽已较为成熟,但是超大范围,甚至全国范围的地表形变快速提取仍充满挑战。为快速获取全国地表形变信息,设计了一种基于超算并行计算的广域地表形变快速提取优化方法,并对干涉集基线组合方法、广域相位解缠算法、大气效应改正方法等进行了改进和创新。基于该方法,采用10 157景哨兵1号数据,研制了中国全境2021年度40 m分辨率地表形变速率图,经验证形变速率精度为4.82 mm/a,有效覆盖度为94.6%,图幅间无明显接边差异。同时对国内典型地表形变区域进行了分析。研究为广域地表形变常态... | The damage of ground deformation is huge and farreaching. Although it is relatively mature to monitor ground deformation via interferometric synthetic aperture radar (InSAR), challenges still exist in the fast extraction of largescale ground deformation, i. e., across the country. To quickly obtain the national ground ... |
随着Galileo卫星系统的全面建成,多频Galileo观测值提供了更低噪声和更长波长的观测值组合,从而为Galileo瞬时精密单点定位(precise point positioning,PPP)模糊度固定(ambiguity resolution,AR)提供良好的条件。从三频无电离层组合观测模型出发,重点分析了Galileo各个频点观测值组合的噪声放大因子,并基于15个MGEX(multi-GNSS experiment)测站10天的观测数据评估了不同频率组合的Galileo瞬时PPP-AR定位精度。结果表明:在位置精度衰减因子(position dilution of precision,PDOP)较差时(PDOP= 2.3)... | With the full completion of the Galileo satellite system, the combination of observations with lower noise and longer wavelengths can be provided by multi-frequency Galileo observations. Therefore, it is possible to achieve Galileo instantaneous precision point positioning (PPP) with ambiguity resolution (AR). Based on... |
人工测量夯沉量的方式精度差、效率低且危险性高。针对这些问题,利用单目视觉方法实现了夯沉量的实时高效测量。为验证该方法的有效性,基于夯沉量解算模型,根据误差传播定律建立了夯沉量精度评价模型,并进行了误差敏感性分析,给出了提高夯沉量测量精度的方法和建议。结果表明,对测量精度影响最大的参数为相机俯仰角;特征点识别误差是测量结果误差的主要来源。工程实测结果表明,夯沉量解算均方误差为±28.46 mm,符合工程现场夯沉量测量误差的精度要求,具有推广价值。 | To address the problems of manual measurement of ramming settlement such as poor accuracy, low efficiency and high risk, the monocular vision method is used to realize the real-time and high-efficiency measurement of ramming settlement. To verify the effectiveness of this method, the ramming settlement accuracy evaluat... |
在单目视觉测距系统中,摄像机安装偏差会造成摄像机云台俯仰角与模型俯仰角不一致,从而影响远距离单目测距和定位的精度。针对这一问题,提出了一种基于梯度下降法的俯仰角校正方法。该方法根据单目测距原理和参考点与摄像机的实际距离,构建出梯度下降法的目标函数;对目标函数进行一阶微分,求出目标函数的梯度;迭代计算出使目标函数值小于设定阈值的俯仰角,以此为单目测距模型最优俯仰角。在此基础上,依据单目视觉成像原理构建像素坐标与实际坐标间的函数关系,计算特征点的实际坐标。以球型摄像机为图像采集设备开展实验与应用,结果表明,测距结果的相对误差都在4%以内。这证明该方法能准确校正单目测距俯仰角,确保测距精度,且能有效确定特征点坐标。 | In the monocular vision ranging system, the camera installation deviation will cause the inconsistencies between the camera head's pitch angle and the model's pitch angle, which will affect the accuracy of the long-distance monocular vision ranging and positioning. To solve this problem, we propose a pitch angle correc... |
对绝大多数空间目标而言,由于观测条件和观测手段的限制,测轨数据稀疏且精度较低,传统轨道确定时一并解算的大气阻力系数精度稳定性很差。针对这一问题,提出一种基于随机森林的大气阻力系数预测模型。该模型主要利用某个目标的历史大气阻力系数、轨道数据、太阳地磁指数、大气密度等信息预测该目标未来一段时间内的大气阻力系数。仿真GRACE(gravity recovery and climate experiment)A卫星2002年的测轨数据,进行多个时间段的轨道确定与预报模拟实验。结果表明,相比于传统方法,利用所提模型预测大气阻力系数,再将其应用于轨道确定和预报,7天轨道预报最大误差降幅可达60%,有效抑制了最大误差,为稀疏测轨数据条件下改善空间... | For most space objects, due to the limitations of observation conditions and observation means, tracking data is usually sparse and of low accuracy, and the accuracy of atmospheric drag coefficients solved in the normal orbit determination process, is very unstable. To solve this problem, we propose a predictive model ... |
星载合成孔径雷达(synthetic aperture radar,SAR)具备强穿透性和不受光照限制等优势,针对在高频波段星载SAR和地面通信时受色散效应影响,产生的信号畸变、失真、幅度起伏和相位起伏问题,提出了一种基于自适应滤波的校正匹配滤波算法,分析了信号失真的特征,对脉冲波形进行校正。实验结果表明,该算法有效补偿了时间延迟和相位畸变,纠正了脉冲信号波形失真。 | Spaceborne synthetic aperture radar (SAR) has the advantages of strong penetrability and no limitation of illumination. Aiming at the problems of signal distortion, signal inaccuracy, amplitude fluctuation and phase fluctuation caused by dispersion effect in high-frequency band during the communication of spaceborne SA... |
通过计算机代数系统Mathematica推导出了以地心纬度、归化纬度为变量的卯酉圈曲率半径、子午圈曲率半径和平均曲率半径的直接表达式,该表达式适用于任何椭球参数,具有通用性。并将常规的基于第一偏心率e表示的公式改写为基于第三扁率n表示的公式,以2000国家大地坐标系(China Geodetic Coordinate System 2000,CGCS2000)椭球为例分析了推导出的直接表达式的精确性和可靠性。经分析可得,常用曲率半径展开至e6或n3时,既能满足大地测量学要求的精度,也更为紧凑简练,一定程度上提高了地图投影的计算效率。 | With the computer algebra system Mathematica, the direct calculation formulas of radius of curvature in prime vertical, meridian radius of curvature, mean radius of curvature are derived,which take geocentric latitude and reduced latitude as variables. The expressions can be applied to any ellipsoid parameter for their... |
视觉同步定位与建图(visual simultaneous localization and mapping,VSLAM)技术是近年来机器人和计算机视觉领域的重点研究方向之一,但当前的主流算法主要面向静态环境,当场景中存在运动的物体时,算法的定位精度和稳定性会受到很大影响。为了解决上述问题,提出了一种惯性测量单元(inertial measurement unit,IMU)积分与YOLOv4语义分割结合的VSLAM前端动态特征点剔除算法,通过YOLOv4网络对图像进行语义分割,识别图像中有运动可能的物体;再将IMU积分与语义分割结合,对目标检测框内有运动可能的特征点进行重投影误差的解算,识别并剔除环境中运动的特征点。在TUM Vis... | Visual simultaneous localization and mapping (VSLAM) technology is one of the key research directions in the field of robotics and computer vision in recent years, but the current algorithms are mainly oriented to static environment. When there are moving objects in the scene, the positioning accuracy and stability of ... |
以单体建筑为对象的属性挂接方法已无法满足城市建筑立体空间多层差异的属性信息挂接需求。因此,提出一种基于倾斜三维数据的建筑物智能楼层提取方法,该方法利用现有二维建筑物矢量边界提取建筑物立面纹理,并在Mask R-CNN模型上增加一个特征增强结构--反向的特征金字塔(feature pyramid network,FPN),充分利用高低层特征信息,提升窗户识别检测率;同时,根据窗户排列规则进行规则化补全,然后进行层高计算、分割楼层。实验证明所提方法容错性较好,即使在窗户识别不全或有遮挡的情况下,经过简单的后处理也能实现楼层的分层。 | The attribute linking method that takes the single building as the object can no longer meet the demand of attribute information linking for the multi-layer difference in 3D space of urban buildings. Therefore, we propose an intelligent method to extract building floors based on oblique photogrammetry 3D data. This met... |
针对现有关键帧提取方法时间复杂度高、漏检率大、忽略视频语义信息等问题,提出一种基于互信息熵和局部聚合描述符向量网络(vector of local aggregated descriptors net,NetVLAD)的视频关键帧提取方法。首先计算视频帧互信息熵,将视频划分为视频子集;然后通过NetVLAD进行视频帧的特征提取与聚类,根据最近邻匹配算法计算帧间距离,提取候选关键帧;最后通过感知哈希减少冗余度,得到关键帧集合。基于UAV-123数据集进行了实验分析,结果表明,该方法高鲁棒地提高了关键帧的提取效率,保证了高保真度的同时降低了关键帧的冗余。 | To solve the problems of existing key frame extraction methods, such as high time complexity, high miss rate and video semantic information neglect, we propose a video keyframe extraction method based on mutual information entropy and vector of local aggregated descriptors net (NetVLAD). First, we calculate the mutual ... |
使用卷帘快门相机进行移动测量时,由于逐行曝光的特点,影像上会产生果冻效应。而传统的建图与视觉定位方法大多假设影像是全局快门获取,直接处理卷帘快门影像很难得到高精度的结果。针对以上问题,构建基于插值的卷帘快门相机模型,并将其用于卷帘快门影像的高精度建图与视觉定位。建图时使用运动恢复结构算法,利用卷帘快门相机模型对影像特征点进行坐标插值,获取该点的位姿,继而得到对应的投影矩阵,再进行卷帘快门三角化和卷帘快门光束法平差优化,完成高精度建图。在视觉定位环节,利用PnP(perspective-n-point)算法获取影像定位初值,之后使用卷帘快门影像绝对位姿优化算法进行优化。实验结果表明,与传统方法相比,所提方法的建图与视觉定位精度更高。 | Images might suffer rolling shutter effect due to the characteristic of row-by-row exposure if a rolling shutter cam era for movement measurement is used. Traditional methods on mapping and visual positioning typically assume that images are obtained by a global shutter, so, it is difficult to obtain high-precision res... |
以美国航空航天局(National Aeronautics and Space Administration,NASA)、欧洲航天局(European Space Agency,ESA)、加蓬航天局合作的AfriSAR项目中的Lopenp和Mondah为实验区,以L波段的多基线全极化无人驾驶飞行器合成孔径雷达(unmanned aerial vehicle synthetic aperture radar,UAVSAR)数据为数据源,分别采用高度偏差(height variance,VAR)方法、偏心率(eccentricity,ECC)方法和平均相干幅度与分离度乘积(product of average coherence mag... | In this study, Lopenp and Mondah in the collaborative AfriSAR project between National Aeronautics and Space Administration (NASA), European Space Agency (ESA) and Gabonese Space Agency are used as test areas. Taking the multi-baseline fully polarized unmanned aerial vehicle synthetic aperture radar (UAVSAR) data of L-... |
遥感影像的云修复是改善影像质量、降低数据成本的一种重要手段。使用Landsat 8影像研究卷积神经网络在云修复中的应用,提出一种影像信息重建的新式网络结构--边缘辅助的门控卷积网络(edge-guided gated convolutional network,EGCN)。该网络以多时相数据作为含云影像上被遮挡信息的辅助数据,主干网络为多时空门控卷积网络(spatial-temporal based gated convolutional network,STGCN),在多尺度特征融合模块引入一种改进的非局部(non-local, NL)模块--门控非局部(gated non-local,GNL)来替代传统的卷积层,并以边缘特征提取... | Cloud removal of remote sensing images is one of the important technologies to improve data quality and reduce data cost. A novel network structure to reconstruct missing information in images, which is called edge-guided gated convolutional network (EGCN), is put forward via the applications of convolutional neural ne... |
基于长江中游城市群28个城市的数据,以碳排放为非期望产出,利用超效率松弛变量测度模型计算该城市群2010-2016年的城镇建设用地生态效率,采用社会网络模型分析城市群内建设用地生态效率的空间关联及其影响机制。研究表明,该城市群整体建设用地生态效率水平较低,其网络结构呈南强北弱的格局,空间关联度有待加强。城市经济发展水平和人口规模的差异是其关联性的主要影响因素。因此,进一步提升中心城市人口集聚规模与经济发展水平,统一排放标准,加强城市间产业合作,通过提高城市群内建设用地生态效率的网络关系实现协同减排是城市组团绿色发展的重要途径。 | Based on the data of 28 cities in urban agglomeration in the middle reaches of the Yangtze River, taking carbon emissions as unexpected output, we use super slack based measure model to calculate the eco-efficiency of urban construction land in this urban agglomeration from 2010 to 2016, and use social network model to... |
鉴于当前较难获取最新高精度长时序遥感城市土地监测图,现有城市扩展空间驱动分析实践识别主要驱动因子时未检验因子集的全局解释性且较少关注空间溢出效应。以东莞为实验对象,集合Landsat影像和MODIS归一化植被指数(normalized differential vegetation index,NDVI)时序产品,构建深度学习分类器,获取高精度土地覆盖分类图,识别城市扩展,使用基于logistic回归的探索性回归识别解释东莞全局城市扩展的最优因子集,进而使用auto logistic回归测度空间溢出效应的影响并进行驱动分析。研究发现:①基于深度学习分类器,融合Landsat光谱、纹理和MODIS NDVI时序变化信息可获取高精度(K... | Currently, it is difficult to obtain the latest high-accuracy remote sensing urban land monitoring maps over longtime span, while the studies on spatial determinant analysis of urban expansion ignore the globally explanatory ability of determinant sets and pay little attention to spillover effect when identifying major... |
中国城市群的飞跃式发展带来空前经济繁荣的同时也引起了发展与保护的严重矛盾,如何协调城市群生态与经济的关系成为关注热点。但目前针对中国城市群协调发展的研究多局限于省(区、市)级单元,较少关注县(市、区)尺度。因此以中国三大城市群之一的京津冀城市群为例,构建生态与经济协调发展评价指标体系,对2000年、2005年、2010年、 2015年、2018年的县(市、区)协调水平进行评价。结果表明: ①城市群经济差异极大且不平衡的趋势加重,经济较为发达的地区主要集中于京津和河北省地级市市辖区,呈现以京津为核心的聚集团状结构和以多个地级市市辖区为散点的点状结构;②城市群整体生态水平“先恶化后优化”,高生态水平县(市、区)前期主要集中于城市群北部,... | The rapid development of urban agglomeration in China has brought unprecedented economic prosperity, but also caused the serious contradiction between development and protection. How to coordinate ecology and economy of urban agglomeration has become an impending challenge. However, present studies are mainly focused o... |
对地区的人群活动时空特征进行识别,有利于认识地区空间结构特质,但现有研究对县域及以下层面的关注相对不足,且用于表征县域尺度人群活动的手机信令数据呈现一定的稀疏性,欠缺系统的数据处理方法。为此,以广东省新兴县为例,选取2020年工作日和周末两个特征日的手机信令数据构建时空矩阵,利用非负矩阵分解方法提取隐含的活动模式特征;并基于这些特征,通过k-means聚类算法得出各类功能区在县域的空间分布。研究表明,新兴县周末的夜间经济繁荣、人群活动模式丰富,中心城区的人群活动强度高,但同周边村镇的联系弱;县域内以居住功能为主导,不存在显著的功能分区。研究结果说明了利用非负矩阵分解方法可有效提取稀疏时空矩阵中的模式特征,可为县域国土空间规划编制提供... | The identification of spatiotemporal characteristics of crowd activity is conducive to the understanding of regional spatial structure characteristics. However, the existing studies have not paid enough attention to the county level and below. Moreover, the mobile signaling data used to characterize the crowd activitie... |
在交通与经济联系视角下,以2019年和2020年为时间截面,基于社会网络理论分析粤港澳大湾区城市空间结构与联系网络特征,探究未来大湾区的发展方向与协同模式,以期对大湾区发展规划提供几点建议。结果表明:①粤港澳大湾区存在明显的“东强西弱”空间分异格局,广州、深圳、佛山为湾区城市主要联系方向,形成“广州-佛山”“深圳-东莞”交通极点和“佛山-广州-东莞-深圳-香港”经济联系主线; ②粤港澳大湾区已形成较为明显的以广州、深圳、香港为核心的多中心化网络结构,高位序城市节点表现出较强的虹吸效应,城市间双向联系呈现一定的对称性,但整体网络集聚趋势尚不明显;③粤港澳大湾区正逐步形成以湾区中轴为核心的圈层结构,并通过多个凝聚子群形成以点带面的协同发... | We analyze the urban spatial structure and connection network's characteristics of Guangdong-Hong Kong-Macao Greater Bay Area from 2019 to 2020 based on social network theory from the perspective of transportation relationship and economic relationship, and explore the development direction and the coordinated mode of ... |
红绿灯位置是道路上行人和车辆的交会点,极大影响着道路结构和交通运行,在城市路网中起着重要的枢纽作用。针对目前红绿灯位置检测方法准确率不够高、覆盖面区域不完整等问题,提出了一种基于轨迹数据的交通灯位置检测方法。该方法基于聚类-合并-分类-合并的四级模型,首先从清理过的轨迹数据中提取隐含的车辆行驶特征,再采用具有噪声的基于密度的聚类(density-based spatial clustering of applications with noise,DBSCAN)方法得到转向和停驻两类聚类中心,对这两类聚类中心进行合并,获得红绿灯位置的候选位置;根据候选位置一定范围内的轨迹点提取该区域的车流行驶特征,然后采用梯度提升决策树(gradi... | The position of traffic lights is the intersection of pedestrians and vehicles on the road, which greatly affects the structure of the road and the operation of traffic, and it plays an important pivotal role in the urban road networks. In response to the problems of low accuracy and incomplete coverage area of current... |
描述了一种基于浏览器/服务器(browser/server,B/S)架构的地理信息低代码开发平台的可视化编排设计和实现方法,为组件库、界面层编排、逻辑层编排和数据层编排设计了完善的行为规则。通过该方法实现平台的编排能力,采用拖拽组件和配置参数、逻辑编排、数据编排等方式实现领域地理信息应用软件开发,并用实例证明了该方法能够大幅提高地理信息应用软件开发效率、减少开发成本。 | A visual layout design and implementation method of GIS low-code development platform based on browser/server (B/S) architecture is described to design optimized behavior rules for component library, interface layer arrangement, logic layer arrangement and data layer arrangement. This method can realize the arrangement... |
遥感技术属于发达国家对中国采取核心技术封锁和核心元器件禁运的“卡脖子”领域。基于遥感技术发展与城市应用需求,介绍了城市遥感课程教学改革的思路和具体内容,提出了城市遥感课程“以课堂教学为主体、以专题研究为主线,以原理介绍、案例分析、思政案例介绍为教学环节,以分行业需求分析和针对性练习为辅助”的“二三二”教学模式,并对该模式的实施情况进行了介绍。试点教学表明,该模式有效增强了学生学习的主动性,在引导学生构建完善的城市遥感知识体系和激发本科生探索兴趣方面效果良好。 “二三二”教学模式有可能是一种适合中国国情的高校城市遥感课堂教学模式,值得进一步尝试和推广。 | Remote sensing technology is the bottleneck field of core technology blockade and core components embargo im posed by developed countries against China. Based on the development of remote sensing technology and the needs of urban application, we introduce the ideas and specific contents of the teaching reform of Urban ... |
随着大数据与人工智能时代的到来,发展智能教育,应对新技术浪潮,培养新时代所需的专业人才已成为高校的重要任务。以中国地质大学(武汉)地理空间信息工程(geospatial information engineering,GIE)专业为例,结合专业特色和优势,基于新时代教育的新理念、新机构、新模式探索了GIE专业人才培养模式。围绕创新的“三融合”人才培养理念,开展了跨学科教学平台、专业课程结构、新型教学模式3个方面的人才培养体系设计探索。实践表明,该模式取得了显著的成果,对同类院校设置培养方案具有一定参考意义。 | With the advent of big data and artificial intelligence, it has become an important task for the colleges and universities to develop smart education, in response to the wave of new technologies and train professionals needed in the new era. Taking the geospatial information engineering (GIE) major of China University ... |
完好性对于全球卫星导航系统(GNSS)来说至关重要,关乎到其能否被放心应用。卫星自主完好性监测(SAIM)技术,是完好性监测技术发展的前沿趋势,国内外卫星导航系统均竞相发展。介绍了北斗三号系统SAIM技术设计与实现的重要意义,从功能设计和实现原理两个方面,阐述了北斗三号SAIM技术体制。针对SAIM实际在轨监测数据的正态分布特性服从程度和长期稳定性等问题,随机选取某一颗中圆轨道(MEO)卫星自2020年7月31日北斗三号系统正式开通服务以来至2021年7月31日连续1年期间的监测数据,得到真实在轨监测数据的分布特性。最后,提出了告警门限优化、分级告警策略设计、星历完好性自主监测等方面的后续发展必要性建议,旨在为北斗系统更好地为全球用... | Integrity is very important for the global navigation satellite system(GNSS),which is related to whether it can be safely applied.Satellite autonomous integrity monitoring(SAIM)technology is the frontier trend of the development of integrity monitoring technology,so that all GNSS around the world are competing to devel... |
近年来,基于信道状态信息(CSI)的无线感知技术在室内定位、活动识别、健康检测等方向有众多探索性研究应用。然而,现有研究获取CSI数据主要依靠自主采集,对CSI开源数据集和数据采集设备/工具的研究现状不够清晰。首先阐述了基于无线保真(WiFi)CSI的无线感知技术,详细介绍了9种CSI数据采集设备/工具,概括了CSI的应用方向及研究现状,并汇总了近5年的CSI开源数据集,分析了现有CSI无线感知研究的局限性与面临的挑战,最后总结全文并对CSI无线感知未来的发展进行展望。 | In recent years,wireless sensing technology based on channel state information(CSI) has been extensively and exploratorily studied and applied in several directions,such as indoor positioning, activity recognition,and health monitoring.However,the current research primarily relies on the independent collection of CSI d... |
全球导航卫星系统(GNSS)超快精密定轨为GNSS实时应用提供了高精度空间基准。基于天地协同定位、导航与授时(PNT)网络服务中心实现了四系统GNSS卫星超快精密定轨,并对定轨结果进行精度评价。介绍了天地协同PNT网络的概念内涵以及网络服务中心部署的超快精密定轨软件架构和详细功能,并针对实时应用需求提出了一种双线程滑动窗口超快精密定轨策略。最后利用重叠弧段比较、与外部轨道产品比较以及卫星激光测距(SLR)检核3种方式对定轨结果进行了精度评价。结果表明,与武汉大学分析中心的最终事后精密轨道产品相比,四系统GNSS MEO卫星预报6h弧段的径向均方根(RMS)误差整体在2~5cm水平,BDS2IGSO卫星最小一维RMS误差在10~15c... | Multi-global navigation satellite system(GNSS)ultra-rapid precise orbit determination provides high-precision space reference for GNSS real-time applications.The multi-GNSS ultrarapid precise orbit determination at space-ground collaborative positioning,navigation and timing (PNT)network service center is implemented a... |
基于LT-01A卫星星载BDS-3/GPS观测值进行了星载实时精密定轨研究,并重点分析了广播星历旋转误差对实时定轨精度的影响。通过赫尔默特转换评估了所选时段内GPS和BDS-3广播星历轨道旋转误差,显示BDS-3广播星历旋转误差可达-8.7mas,平均量级较GPS大约2.5倍。BDS-3广播星历经旋转改正后,轨道切向、法向均方根(RMS)误差从25cm左右提升至10cm量级,提升幅度超过50%。因此,基于星载BDS-3以及BDS-3/GPS联合的实时定轨精度受BDS-3星历旋转误差影响严重,且主要作用于切向和法向。经过旋转改正后,单独BDS-3实时定轨在切向、法向、径向RMS分别为21.0cm、10.7cm及11.2cm,其切向和法... | The real-time orbit determination(RTOD)performance with onboard BDS-3and GPS observations from a Chinese low Earth orbit satellite,LT-01A,is analyzed,with a focus on the impact of broadcast ephemeris rotation error on RTOD accuracy.The orbit rotation errors of GPS and BDS-3broadcast ephemeris are evaluated by Helmert t... |
针对密林中卫星信号遮挡难以实现快速高精度定位的问题,提出了一种密林环境空地协同全球卫星导航系统/超宽带(GNSS/UWB)高精度定位方法。该方法综合考虑无人机平台在空旷环境快速运动与超宽带的强穿透性测量等特征,通过无人机携带GNSS/UWB集成化载荷,以移动单基站模拟多基站,配合密林中UWB标签组网测距,完成密林中UWB标签定位。对基站布设方案展开研究,为密林环境下空地协同GNSS/UWB快速高精度定位技术应用提供基站布设指导和依据,并且利用密林环境下实测测距实验+仿真定位实验对提出的方法进行验证。结果表明,所述方法可有效实现密林环境下的快速高精度定位,精度达到分米级,并且通过优选基站布设网型、范围及高度可有效提高定位精度,为密林环... | An air-ground collaborative GNSS/UWB high-precision positioning method for dense forest environments is proposed,aiming to address the challenges of satellite signal obstruction, and achieve fast and accurate positioning.The method takes into consideration the characteristics of unmanned aerial vehicle(UAV)platforms in... |
当前大部分城市为保护卫星连续运行参考站(CORS)系统基准站天线安装了整流罩,但天线整流罩对观测值以及基准站坐标影响的研究仍显不足。为解决基于广州CORS(GZCORS)的网络RTK高程测量存在较大偏差的问题,基于2016-2021年观测站数据,以及拆除基准站天线罩前后的观测数据质量与定位效果相关分析,对天线整流罩对GNSS观测值与高程定位精度的影响进行了深入探究,并分别进行了静态仿动态和城市车载动态定位测试验证。研究结果显示,天线整流罩在一定程度上会增加原始观测值的多路径效应影响,降低约10%的数据可用率,并对基准站高程定位结果产生1~14cm的系统性偏差,进而影响用户RTK高程定位效果。定位结果显示,拆除基准站天线罩后,基于GZ... | Currently,most reference stations of the satellite continuous operation reference station (CORS)system in cities have installed radomes to protect the antenna.However,the research on the impact of radomes on the observations and reference station coordinates is relatively insufficient. To solve the problem of significa... |
由于高轨空间超出北斗卫星导航系统的正常服务区域,导航信号微弱、可见性差,难以实现高轨飞行器全程稳定可靠的导航定位服务。提出了以空间卫星为时空基准传递平台,向高轨空间区域发射导航信号,从而提高高轨飞行器导航性能的方法,并展开面向高轨空间的北斗导航性能增强星座选型研究。基于卫星可见性、精度衰减因子(DOP)、信号接收门限和所需增强卫星数目等评估指标,仿真分析了基于LEO星座、MEO星座和HEO星座的北斗导航增强性能。 | As in the high-orbit space which exceeds the normal service area of the BeiDou navigation satellite system,the navigation signal is weak and the visibility is poor,and it is difficult to achieve stable and reliable navigation and positioning services for high-orbit aircraft.A method for improving the navigation perform... |
通常使用无电离层(IF)线性组合(LC)消除低地球轨道(LEO)卫星简化动力学精密定轨(POD)一阶电离层延迟误差,忽略了高阶电离层(HOI)延迟误差。随着LEO卫星POD技术的发展,计算不同轨道高度的HOI延迟并探索其变化已成为进一步提高POD精度的重要手段。首先,使用国际参考电离层-2016(IRI-2016)和国际地磁参考场第13代(IGRF-13)模型,计算电离层穿刺点(IPP)位置和地磁场强度。其次,使用平滑星载GNSS数据计算电离层斜路径总电子含量(STEC)。然后,分别计算GOCE、GRACE-A和SWARM-A/B卫星的二阶和三阶电离层延迟。最后,评估了HOI延迟对LEO卫星重叠轨道分析、卫星激光测距(SLR)检核和... | Ionospheric-free(IF)linear combination(LC)is usually used to eliminate the first-order ionospheric delay error of low Earth orbit(LEO)satellite reduced-dynamic precision orbit determination(POD),ignoring the high-order ionospheric(HOI)delay error.With the development of LEO satellite POD technology,calculating the HOI ... |
欺骗干扰已经成为北斗卫星导航系统安全性的一个严重威胁。针对北斗系统面临的欺骗干扰问题,建立二元假设检验模型。由于施加单一天线发射的欺骗干扰后,当前观测频点下各高俯仰角可见星的载噪比值会产生相同的变化趋势,所以基于此变化规律提出了一种利用K-means聚类算法进行分析的北斗卫星信号欺骗干扰检测方法,并给出了施加欺骗载噪比变化域的定义。最后通过在外场搭建实验环境,对实采数据进行了实验验证。实验结果表明,本方法对于欺骗功率优势≥6dBm的大功率优势欺骗信号的检测概率可以达到95%以上,为提高接收机抗干扰能力提供了有益参考。 | Spoofing has become a severe threat to the security of the Beidou navigation satellite system. Aiming at spoofing and interference issues faced by the Beidou system,a binary hypothesis testing model is established.Since the carrier-to-noise ratio of visible stars with high pitch angle at the current observation frequen... |
针对栅格算法易受邻域星点影响导致误匹配的问题,提出了一种结合角距特征的改进栅格星图识别算法。首先介绍了改进栅格算法的原理,其次设计了融合栅格识别模式和星角距识别模式的算法实现流程,最后开展了基于不同视角下的大视场仿真星图的算法试验验证和性能分析。结果表明,由于角距特征具有旋转不变性和不易受观测星邻域星点分布影响等特点,结合角距特征对失效观测星进行再匹配的改进栅格算法,在兼顾存储量需求小、运行速度快等优势的同时,识别率和鲁棒性也得到了提升,最高识别率可达98.88%,在位置噪声干扰以及缺失星干扰下,改进算法的识别率仍可保持在95%,说明算法鲁棒性强,具有较好的应用前景。 | In order to solve the problem that grid algorithm is easily affected by stars in the neighborhood, which leads to the mismatching problem,an improved grid algorithm based on angular distance feature is proposed.Firstly,the principle of the improved grid algorithm is introduced. Then the algorithm flow of combining grid... |
针对行人惯性导航系统误差随时间累积致使定位精度严重下降的问题,提出了一种基于足间距信息辅助的行人三维惯性定位算法。该算法在零速修正算法的基础上,利用足部安装的超声波测距模块实时测量行人双足相对距离,构建了基于超声测距的足间距约束模型,通过随机森林算法实现行人运动模式识别,并针对上下楼梯场景,利用台阶高度和足间距信息进行高度解算,最终实现行人三维惯性定位。在实际路线上开展了三维定位实验,数据显示,所提算法平面闭环误差为总路程的0.64%,与零速修正算法相比下降了55.56%,高度误差为0.06m,与零速修正和气压计联合算法相比下降了64.70%,能够实现导航误差在总路程的0.50%以内的三维定位。实验结果表明,所提算法具有良好的工程应... | To solve the problem of the severe decrease in positioning accuracy caused by the accumulation of errors in the pedestrian inertial navigation system over time,a three-dimensional(3D) pedestrian inertial positioning algorithm based on the auxiliary information of inter-foot distance is proposed.Based on zero velocity u... |
精密单点定位(PPP)时间传递技术是国际时间比对的重要手段之一,为协调世界时的计算做出巨大贡献。为探究多系统融合PPP时间频率传递性能,选取3个国际授时实验室的测站数据组成2条链路,采用8种实验模式对比分析单系统、双系统、三系统和四系统PPP时间频率传递性能。实验结果表明:各多系统组合较单GPS系统在可见星数上均有较大提升,且极大改善了钟差精度因子,增加了时间比对结果的稳健性和可靠性。在时间传递稳定性方面:对于453.4km的PTBB-BRUX链路,较单GPS系统,双系统中GPS/BDS组合提升效果最优,提升率约为10.39%,三系统中GPS/GLONASS/BDS组合提升率最优,约为11.86%,四系统组合提升率为11.98%,可... | Precise point positioning(PPP)time transfer technology is one of the important means of international time comparison and has made great contribution to the calculation of coordinated universal time(UTC).In order to investigate the performance of multi-system PPP time and frequency transfers,the station data from three... |
Y波导集成光学器件(以下简称Y波导)作为光纤陀螺的核心部件,其可靠性对光纤陀螺整体的可靠性有很大影响。为了快速作出Y波导的可靠性及寿命估计,使用高加速寿命试验(HALT)的方法开展Y波导可靠性和寿命估计的研究,研究环境因素(高温、快速温变以及高湿等)对Y波导性能的影响,结果表明高温会显著影响Y波导性能,且Y波导的高温破坏极限为150℃,工作极限为130℃,主要影响的参数是插入损耗和分束比。使用120℃的条件进行Y波导的高加速寿命试验,得到Y波导在120℃的寿命约为1 120h,等效于25℃的93年寿命,并根据失效数量随时间的变化绘制出了可靠性浴盆曲线。完成了对Y波导的可靠性评估和寿命估计。 | Y waveguide integrated optical device(hereinafter referred to as Y waveguide)serves as the core component of fiber optic gyroscope(FOG),its reliability significantly effects the overall reliability of FOG.To quickly explore the reliability and life estimation of Y waveguide,highly accelerated life test (HALT)is used,an... |
使用DP83640IEEE 1588精密时间协议(PTP)收发芯片设计实现了一款秒脉冲精密移相器,它能与外部的标准秒脉冲(1PPS)进行同步并进行精密相位微调,可应用于高精度相位微跃器。秒脉冲移相器采用DP83640芯片进行级联实现秒脉冲精密移相:利用ARM微处理器控制第二级DP83640实现与外部标准秒脉冲的相位粗调,控制第一级DP83640实现相位微调。相位调整时将外部输入的相位偏移量换算为8ns整周期倍数的相位粗调值,以及不同时间长度档位的相位微调值,分别写入第二级和第一级DP83640共同实现高精度相位微跃。由于硬件电路特性和器件综合噪声的影响,经测试平均相位微跃准确度可以达到0.1fs。 | The DP83640IEEE 1588precise time protocol(PTP)transceiver chip is used to design a pulse-per-second precision phase shifter,which is synchronized with the external standard pulse per second(one pulse per second,1PPS)and perform precise phase adjustment,and can be applied to high-precision frequency and phase offset gen... |
骨质疏松症(OP)是一种以增龄性骨量降低,骨微结构破坏,骨脆性增加且易骨折的代谢性骨病。该病好发于绝经后女性和中老年男性,起病隐匿,多数患者在骨折后才被确诊,造成了大量的医疗资源消耗。浙江中医药大学附属第三医院姚新苗教授研究团队基于"肾主骨""肾气虚损"等基础理论,创新性提出了OP"亏瘀致痿"的致病理论,认为OP的病机是亏虚瘀互结、夹杂致痿。在该理论指导下,认为应采用"补肾健脾活血法"对OP患者进行辨证论治。补肾健脾活血法主要包括虚瘀同治;补肾为本、健脾为要;筋骨并重3个方面。该研究团队开展了一系列临床与基础研究,从不同角度阐释"亏瘀致痿"理论指导下OP康复策略的科学内涵。 | Osteoporosis (OP) is a metabolic bone disease characterized by an age-related loss of bone mass, destruction of bone microstructure, increased bone fragility and susceptibility to fracture. It is prevalent in postmenopausal women and middle-aged and elderly men and has an insidious onset. Most patients are diagnosed on... |
目的观察高频重复经颅磁刺激(rTMS)对脑卒中后认知障碍合并抑郁(PSCCID)患者的临床疗效。方法选取2018年1月-2020年12月在四川省医学科学院·四川省人民医院康复科住院的PSCCID患者30例,采用随机数字表法分为对照组和观察组,每组15例。对照组接受常规药物治疗和常规康复治疗,包括运动治疗(40 min/次,1次/d,5 d/周)、作业治疗(30 min/次,1次/d,5 d/周)、认知功能训练(30 min/次,1次/d, 5 d/周),持续治疗4周。观察组在对照组基础上进行高频rTMS治疗(刺激左侧前额叶背外侧皮质,10 Hz, 100%静息运动阈值,20 min/次,1次/d,5 d/周),持续治疗4周。分别在治... | Objective To observe the effect of high-frequency repetitive transcranial magnetic stimulation (rTMS) on patients with post-stroke comorbid cognitive impairment and depression (PSCCID). Methods A total of 30 patients with PSCCID were treated in the department of rehabilitation medicine of Sichuan Academy of Medical Sci... |
目的观察高精度经颅直流电刺激(HD-tDCS)联合悬吊运动训练对脑卒中患者下肢运动功能的影响。方法选择2022年1月-2023年2月在山东大学附属山东省立第三医院康复医学部住院治疗的脑卒中患者120例,按照随机数字表法分为对照组、HD-tDCS组、悬吊组和联合治疗组,每组30例。治疗过程中有4例因中途出院无法继续接受治疗而脱落,其中对照组3例,HD-tDCS组1例,最终对照组、HD-tDCS组、悬吊组和联合治疗组分别纳入27、29、30、30例。对照组接受运动疗法和神经肌肉电刺激等常规康复治疗, 25 min/d,1次/d,5 d/周,持续治疗8周;HD-tDCS组在对照组基础上接受HD-tDCS治疗,主要刺激电极置于偏瘫侧脑初级运... | Objective To observe the effect of high-definition transcranial direct current stimulation combined with suspension exercise training on lower limb motor function of stroke patients. Methods A total of 120 stroke patients treated in the department of rehabilitation medicine of the Shandong Provincial Third Hospital, Sh... |
目的观察MOTOmed智能运动反馈训练联合精细化康复训练对脑梗死后偏瘫患者神经功能、平衡功能、肢体运动功能和生活质量的影响。方法选择2022年1-10月在南通市第三人民医院康复中心住院治疗的148例脑梗死后偏瘫患者,采用随机数字表法分为对照组和观察组,每组74例。对照组在常规治疗基础上接受精细化康复训练。根据脑梗死患者(卧床患者、可坐立患者、借助辅具可站立患者和无辅具可挺直站立患者)肢体运动功能障碍程度给予相应的运动康复训练(如肢体关节训练、身体转移训练、平衡训练和步行训练等),5 d/周,持续治疗12周。观察组在对照组基础上联合MOTOmed智能运动反馈训练(被动运动模式、有助力运动模式和主动训练模式的上肢/下肢运动康复训练),1... | Objective To observe the clinical effect of MOTOmed intelligent motion feedback training combined with refined rehabilitation training on neurological function, balance function, limb motor function and quality of life of patients with hemiplegia after cerebral infarction. Methods A total of 148 patients with hemiplegi... |
目的观察针刺百会、曲鬓穴对急性期脑出血(ICH)大鼠白细胞分化抗原36(CD36)、Toll样受体4 (TLR4)表达的影响,探讨针刺治疗脑出血的作用机制。方法选择144只Wistar雄性大鼠,采用随机数字表法分为假手术组、模型组、针刺组、抑制剂组4组,每组36只,每组按1、3、7 d时间点再分为3个亚组,每组12只。采用立体定位自体血注入法建立ICH大鼠模型。模型组仅接受ICH模型制备,不进行任何治疗;假手术组接受类似模型组各项手术操作,但不进行注血制作;抑制剂组造模后6 h,腹腔注射TLR4抑制剂TAK242, 3 mg/kg,1次/d,连续5 d;造模12 h后,针刺组各亚组开始接受针刺治疗,穴位选择百会穴(顶骨正中)、右侧曲... | Objective To investigate the interventional effect of acupuncture at Baihui (GV 20) and Qubin (GB 7) acupoints on the expression of recombinant cluster of differentiation 36 (CD36) and Toll-like receptor 4 (TLR4) in rats with acute cerebral hemorrhage (ICH), and to explore the mechanism of acupuncture treatment for ICH... |
目的观察电针患侧曲池、阳陵泉穴对脑梗死后肢体痉挛(PSS)大鼠皮质损伤及血清炎性因子[白细胞介素-6(IL-6)、肿瘤坏死因子-α(TNF-α)]、谷氨酸(Glu)、丙二醛(MDA)、核黄素激酶(RFK)和还原性辅酶氧化酶2(NOX2)表达的影响,探讨电针治疗缺血性脑卒中后脑损伤的机制。方法选择SPF级健康成年SD雄性大鼠30只,采用随机数字表法分为假手术组与造模组,每组10、20只。造模组采用Zea-Longa线栓法联合内囊注射N-甲基-D-天冬氨酸(NMDA)制备PSS大鼠模型。造模成功后,造模组按随机数字表法分为模型组、电针组,每组10只。模型组采用鼠板固定大鼠,但不进行干预;电针组接受电针干预,穴位选择患侧阳陵泉穴(左)、曲... | Objective To observe the effect of electroacupuncture at the affected side of Quchi (LI 11) and Yanglingquan (GB 34) acupoints on cortical injury and serum inflammatory factors [interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α)], glutamate (Glu), malondialdehyde (MDA), riboflavin kinase (RFK) and NADPH oxidase 2... |
目的观察关刺法联合本体感觉训练治疗膝骨关节炎(KOA)的临床疗效。方法选择2021年2月- 2022年10月在广州中医药大学附属佛山中医院住院治疗的KOA患者90例,按随机数字表法分为对照组和观察组,每组45例。对照组接受牵伸疗法、关节松动、肌力训练及中频治疗等常规治疗,每项10 min/次, 1次/d,6 d/周,连续治疗4周。观察组在对照组基础上接受关刺法联合本体感觉训练,其中关刺法20 min/次, 1次/d,6 d/周,连续治疗4周;本体感觉训练10 min/次,1次/d,6 d/周,连续治疗4周。分别于治疗前后采用视觉模拟评分法(VAS)评价患者膝关节疼痛程度;采用西安大略和麦克马斯特大学骨关节炎指数(WOMAC)评价患者... | Objective To observe the clinical effect of articular needling therapy combined with proprioceptive training on patients with knee osteoarthritis (KOA). Methods A total of 90 patients with KOA in the Foshan Traditional Chinese Medicine Hospital Affiliated to Guangzhou University of Chinese Medicine from February 2021 t... |
目的观察重复经颅磁刺激(rTMS)联合社交康复训练对注意缺陷多动障碍(ADHD)儿童的影响。方法选择2019年3月-2022年6月在南京医科大学附属儿童医院治疗的ADHD儿童60例,采用随机数字表法分为对照组与观察组,每组30例。对照组接受常规药物治疗,1次/d,持续治疗12周。观察组在常规药物治疗基础上接受rTMS联合社交技能教育和提升项目(PEERS)社交康复训练,其中rTMS治疗15 min/次, 2次/周,持续治疗12周;PEERS社交康复训练课程包含沟通、信息交互、游戏启动、自我倡议、分歧解决、社会语用学6个部分,共12次课,50 min/次,1次/周,持续12周。分别于治疗前后采用注意缺陷多动障碍筛查量表(SNAP-Ⅳ)... | Objective To observe the effect of repetitive transcranial magnetic stimulation (rTMS) combined with social rehabilitation training on children with attention deficit hyperactivity disorder (ADHD). Methods A total of 60 children diagnosed with ADHD in the Children's Hospital of Nanjing Medical University from March 201... |
目的观察基于心肺运动试验(CPET)的心脏运动康复方案对稳定性冠心病合并高血压患者的影响。方法选择徐州市中心医院2023年2-9月收治的稳定性冠心病合并高血压患者80例,按随机数字表方法分为对照组和观察组,每组40例。对照组接受常规药物治疗,共持续12周;观察组在对照组基础上接受基于CPET的心脏康复运动训练,包括有氧运动和抗阻训练,隔天训练1次,3次/周,共持续12周。分别于治疗前后采用CPET评估患者心脏自主神经功能[主要包括静息心率(HR_(rest))、静息收缩压(SBP_(rest))、静息舒张压(DBP_(rest))、峰值心率(HR_(peak))、峰值收缩压(SBP_(peak))、峰值舒张压(DBP_(peak))... | Objective To observe the effect of cardiac exercise rehabilitation program based on cardiopulmonary exercise testing (CPET) on patients with stable coronary heart disease complicated with hypertension. Methods A total of 80 patients with stable coronary artery disease complicated with hypertension in the Xuzhou Central... |
目的分析汉语母语孤独症谱系障碍(ASD)"日历计算专家"(SCC)认知加工特征,并结合头颅磁共振成像(MRI)分析相关脑机制。方法对1例具有SCC特征的汉语母语ASD患者进行随机正常日历计算测试、调整新日历强记能力测试、数字计算能力测试、线方向判断(JLO)测试、失用症检查(口面失用、言语失用和意念运动性失用检查)、额叶功能(FAB)测试和蒙特利尔认知功能评估(MoCA)。采用MRI头颅检查SCC患者,并与健康受试者比较,探讨其脑器质性损伤情况。结果①日历计算能力测试:SCC患者"随机正常日历计算"正确率为80%,平均每题答题时间11.8 s,而健康受试者"随机正常日历计算"平均正确率仅为16%。②日历强记能力测试:SCC患者"调整... | Objective To analyze the cognitive processing characteristics of a native Chinese-speaking savant calendar calculator (SCC) with autism spectrum disorder (ASD) and to investigate the related brain mechanisms with cranial magnetic resonance imaging (MRI). Methods One native Chinese-speaking ASD patient with SCC features... |
目的通过Meta分析探讨软式康复机器人手套(SRG)对脑卒中后患者上肢-手运动功能的影响。方法计算机检索PubMed、Web of Science、The Cochrane Library、Embase、中国知网(CNKI)、万方数据库(Wanfang Data)、中国生物医学文献服务系统(CBMdisc)、维普中文科技期刊数据库(VIP)等数据库有关SRG干预脑卒中后上肢-手运动功能障碍患者的临床随机对照试验(RCTs),检索时限为建库至2023年8月。主要结局指标包括Fugl-Meyer评定量表上肢部分(FMA-UE)评分、改良Barthel指数(MBI)评分、Wolf运动功能(WMFT)评分、握力、箱盒测试(BBT)评分、上肢... | Objective To evaluate the effect of soft rehabilitation robot gloves (SRG) on upper limb, hand motor function and activities of daily living of stroke patients by meta-analysis. Methods Data were searched and retrieved from the PubMed, Web of Science, The Cochrane Library, Embase, China National Knowledge Infrastructur... |
目的通过Meta分析评价重复经颅磁刺激(rTMS)联合认知训练治疗脑卒中后认知障碍(PSCI)患者的疗效。方法计算机检索PubMed、Embase、Cochrane Library、Web of Science、中国知网(CNKI)、万方数据库(Wangfang Data)、维普中文期刊全文数据库(VIP)等数据库中有关rTMS联合认知训练治疗PSCI患者的临床随机对照试验(RCTs),检索时间为建库至2023年6月。主要结局指标包括蒙特利尔认知评估量表(MoCA)、简易智力状态检查量表(MMSE)、日常生活活动能力量表(ADL)、行为记忆测验法(RBMT)评分。由2名评审员使用Cochrane偏倚风险评估工具评估文献质量,使用Re... | Objective To evaluate the efficacy of repetitive transcranial magnetic stimulation (rTMS) combined with cognitive training on patients with post stroke cognitive impairment (PSCI) by Meta-analysis. Methods Data were searched and retrieved from the databases of PubMed, Embase, The Cochrane Library, Web of Science, China... |
脑卒中后睡眠障碍分为睡眠呼吸障碍(SDB)、失眠、日间嗜睡(EDS)与不宁腿综合征(RLS),对脑卒中患者认知、运动等功能预后及生活质量影响较大,应尽早针对脑卒中患者的睡眠障碍开展康复治疗。本研究对脑卒中后睡眠障碍的发病机制与康复治疗研究现状进行综述,其中脑卒中后睡眠障碍发病机制研究主要包括脑卒中后SDB[阻塞性睡眠呼吸暂停综合征(OSAS)、中枢性睡眠呼吸暂停综合征(CSAS)与混合型睡眠呼吸暂停综合征(MSAS)]发病机制;脑卒中后失眠发病机制;脑卒中后EDS发病机制;脑卒中后RLS发病机制。脑卒中后睡眠障碍康复治疗主要包括脑卒中后SDB康复治疗[持续气道正压通气(CPAP)、体位治疗、口咽肌训练];脑卒中后失眠康复治疗[认知行... | Sleep disorder after stroke are classified into sleep-disordered breathing (SDB), insomnia, excessive daytime sleepiness (EDS) and restless legs syndrome (RLS), which have a great impact on the prognosis of cognitive and motor functions and the quality of life of stroke patients. Rehabilitation treatment for sleep diso... |
创面再生修复是烧伤与创面修复外科主要的研究领域之一。近年来,随着康复治疗理念和技术的不断进步,康复治疗与创面再生修复的联系更加紧密,并由此催生出“再生康复”理念。该文对再生康复概念的形成和发展现状以及再生康复领域未来的发展和引领价值进行探讨。 | Wound regeneration and repair is one of the primary research fields in burn and wound repair surgery. In recent years, with the continuous advancement of treatment concept and technologies in the field of rehabilitation, the connection between rehabilitation treatment and wound regeneration and repair has become closer... |
近年来,随着对光生物调节作用分子生物学机制研究的深入,光生物调节已被逐步应用于临床,为各类疾病提供了有效的治疗手段和方法。相较于传统的光热治疗,光生物调节具有疗效好、几乎无不良反应、操作简便等特点,且临床疗效日益显著。该文就光生物调节的机制及其在创伤修复、医学美容等领域中的应用特点及发展趋势进行详细阐述,以期为该疗法在临床中的广泛应用提供理论基础。 | In recent years, with the deepening of researches on the molecular biological mechanisms of photobiomodulation (PBM), PBM has gradually been applied in clinical practice, providing effective treatment methods and approaches for various diseases. Compared with traditional photothermal therapy, PBM has the characteristic... |
目的探讨通过创面局部涂抹、创缘皮下注射和尾静脉注射人脐带间充质干细胞(hUCMSC)外泌体治疗小鼠全层皮肤缺损创面的效果,探究应用hUCMSC外泌体治疗创面的最佳给药途径。方法该研究为实验研究。从3名25~35岁于内蒙古包钢医院妇产科正常分娩产妇弃用脐带组织中提取hUCMSC外泌体并成功鉴定。选用120只6~8周龄雄性BALB/c小鼠,于其背部制备全层皮肤缺损创面后,按随机数字表法分为对照组(不进行给药处理)、创面局部涂抹组、创缘皮下注射组、尾静脉注射组(每组30只小鼠),分别通过创面局部涂抹、创缘皮下注射、尾静脉注射给予后3组小鼠0.2 mL含200 μg hUCMSC外泌体的磷酸盐缓冲液。伤后7、14、21 d,观察创面的大体情... | Objective To investigate the effects of human umbilical cord mesenchymal stem cell (hUCMSC) exosomes in the treatment of full-thickness skin defect wounds in mice through local wound application, subcutaneous injection at the wound margin, and tail vein injection, and to explore the optimal administration route of hUCM... |
目的探究负载人脐带间充质干细胞来源的小细胞外囊泡(hUCMSC-sEV)的甲基丙烯酸酐化明胶(GelMA)水凝胶治疗小鼠全层皮肤缺损创面的效果。方法该研究为实验研究。采用超速离心法提取hUCMSC-sEV,通过透射电子显微镜观察其形貌,采用蛋白质印迹法检测CD9、CD63、肿瘤易感基因101(TSG101)及钙联蛋白的表达。将人脐静脉内皮细胞(HUVEC)及第3、4代人表皮角质形成细胞(HEK)、人真皮成纤维细胞(HDF)均分为常规培养的空白对照组和在细胞培养液中加入hUCMSC-sEV培养的hUCMSC-sEV组,行细胞划痕试验并计算划痕后6、12、24 h的细胞迁移率,行细胞Transwell试验并计算培养12 h细胞迁移数量,... | Objective To investigate the effects of gelatin methacrylate anhydride (GelMA) hydrogel loaded with small extracellular vesicles derived from human umbilical cord mesenchymal stem cells (hUCMSCs-sEVs) in the treatment of full-thickness skin defect wounds in mice. Methods This study was an experimental study. hUCMSCs-sE... |
目的探究人肠道菌群与增生性瘢痕(HS)之间的因果关系。方法该研究为基于双样本孟德尔随机化(TSMR)分析的研究。从全基因组关联分析数据库获得人肠道菌群(18 473个样本)和HS(208 248个样本)的数据。提取已知肠道菌群门、纲、目、科和属5个水平的遗传变异基因,即单核苷酸多态性(SNP)作为工具变量,并进行连锁不平衡(LD)分析。使用PhenoScanner V2数据库进行人类基因型-表型关联分析,排除与HS不相关的肠道菌群SNP并分析获得的SNP是否为弱工具变量。采用TSMR分析的4种方法,即逆方差加权(IVW)、MR-Egger回归、加权中位数和加权模式,对肠道菌群SNP与HS之间的因果关系进行分析。绘制前述4种分析方法得... | Objective To investigate the causality between intestinal flora and hypertrophic scars (HS) of human. Methods This study was a study based on two-sample Mendelian randomization (TSMR) analysis. The data on intestinal flora (n=18 473) and HS (n=208 248) of human were obtained from the genome-wide association study datab... |
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RuSciBenchZhoBitextMining
RuSciBenchZhoBitextMining is a bitext mining task comprising parallel scientific texts in two language pairs: Chinese-English (zh-en) and Chinese-Russian (zh-ru). The goal is to identify corresponding scientific abstracts across these languages. The dataset uses data from sciencechina.cn.
Dataset constriction
The dataset consists of two parts created as follows:
zh-en: A subset of 5,000 random texts was selected from sciencechina.cn. The selection criteria required each text to have annotations in both English (
en) and Chinese (zh), with an annotation length greater than 50 characters.zh-ru: To create the
zh-rupair, the English annotations from the selected subset were translated into Russian. This translation was performed using the gpt-5.1-2025-11-13 model with the reasoning parameter set tolow. The resulting dataset aligns the original Chinese texts with the machine-translated Russian texts.
How to evaluate on this task
First, install MTEB version with this task:
pip install git+https://github.com/mlsa-iai-msu-lab/ru_sci_bench_mteb.git@ruscibench
Then run code evaluate a model on this task:
import mteb
from sentence_transformers import SentenceTransformer
model_name = "sentence-transformers/all-MiniLM-L6-v2"
model = mteb.get_model(model_name)
tasks = mteb.get_tasks(tasks=["RuSciBenchZhoBitextMining"])
results = mteb.evaluate(model, tasks=tasks)
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Size of downloaded dataset files:
17.9 MB
Size of the auto-converted Parquet files:
17.9 MB
Number of rows:
10,000