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交叉口驾驶员视野盲区路侧预警系统研究

吉林建筑大学学报 2024年第1期41卷 43-47页

作者：李若楠张飞军巩舜妹吉林建筑大学交通科学与工程学院长春130118 宿州学院资源与土木工程学院安徽宿州234000

交叉口中建筑物、高架桥墩、树木等对驾驶员视野的遮挡,使其出现视野盲区,造成误判易导致交通事故发生,影响交通安全。因此,对驾驶员视野盲区预警系统的研究尤为重要。本文主要依据驾驶员视野盲区障碍物识别、信息收集、处理及分析,对... 详细信息

交叉口中建筑物、高架桥墩、树木等对驾驶员视野的遮挡,使其出现视野盲区,造成误判易导致交通事故发生,影响交通安全。因此,对驾驶员视野盲区预警系统的研究尤为重要。本文主要依据驾驶员视野盲区障碍物识别、信息收集、处理及分析,对其视野盲区路侧预警系统进行构建、设计和功能开发,从而达到提高驾驶员视野盲区路侧预警水平,减少道路交通事故的目的。

关键词：驾驶员视野盲区路侧预警系统

颅内积气对神经外科手术机器人辅助脑深部电刺激治疗帕金森病的影响

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中华神经外科杂志 2024年第1期40卷 39-45页

作者：巩顺陶英群梁国标王诗邈雷伟吴伟东王强沙蓉黄勃翰袁立佳解放军北部战区总医院神经外科沈阳110016

目的探讨颅内积气(ICA)对神经外科手术机器人辅助脑深部电刺激(DBS)治疗帕金森病(PD)的电极植入精度及临床疗效的影响。方法回顾性分析解放军北部战区总医院神经外科2017年2月至2022年5月接受双侧神经外科手术机器人辅助DBS治疗292例PD... 详细信息

目的探讨颅内积气(ICA)对神经外科手术机器人辅助脑深部电刺激(DBS)治疗帕金森病(PD)的电极植入精度及临床疗效的影响。方法回顾性分析解放军北部战区总医院神经外科2017年2月至2022年5月接受双侧神经外科手术机器人辅助DBS治疗292例PD患者的临床资料,其中局部麻醉95例,全身麻醉197例;以双侧丘脑底核(STN)为靶点植入电极193例,双侧苍白球内侧部(GPi)为靶点99例。通过术后融合CT图像测量分析术后2h、1周的电极束移位、电极头端偏移情况并计算ICA体积;根据ICA体积分为25cm^(3)三个亚组,分析三个亚组在术后2h、1周(分别为188、71、33例),STN靶点(分别为123、48、22例)及GPi靶点(分别为65、23、11例)电极植入精度的组间差异,随访12个月时统一PD评定量表第三部分(UPDRS-Ⅲ)评分改善率、不同靶点程控电压及预后的组间差异。结果292例患者手术均顺利完成,术后均无颅内感染、出血等并发症发生。所有患者的ICA体积为(7.3±0.6)cm^(3),其中第一侧与第二侧、男性与女性、GPi与STN靶点患者的ICA体积差异均无统计学意义(均P>0.05);而局部麻醉与全身麻醉患者的ICA体积差异具有统计学意义(t=6.12,P0.05),术后2h、1周电极头端同侧在X轴偏移距离的差异均无统计学意义(均P>0.05),而在Y轴偏移距离差异均具有统计学意义(均P25cm^(3)亚组中GPi靶点电极植入精度的增加幅度值(术后2h与术后1周的差值)较STN靶点高,差异具有统计学意义[(0.46±0.21)mm对比(0.28±0.18)mm,t=2.56,P=0.016]。292例患者术后12个月均获得临床随访,UPDRS-Ⅲ评分改善率为(59.3±17.9)%,术后STN靶点程控电压为(2.42±0.40)V,GPi靶点程控电压为(3.88±0.56)V。三个亚组的UPDRS-Ⅲ评分改善率、STN靶点程控电压的组间差异均无统计学意义(均P>0.05),而GPi靶点程控电压的组间差异具有统计学意义(Z=17.64,P25cm^(3)亚组占比最高(44.4%,32/72),经过程控调整电压参数等治疗后,症状均改善。结论ICA会引起神经外科手术机器人辅助DBS治疗PD后电极束变形和电极头端移位,影响电极植入精度。当ICA体积>25cm^(3),选择GPi靶点的电极植入精度较难恢复,虽可使PD患者获得运动症状的改善,但程控所需的电压较高,出现的不良反应也较多。

关键词：帕金森病深部脑刺激法颅内积气治疗结果机器人电极精度

Lidar observation campaigns on diurnal variations of the sodium layer in Beijing and Wuhan, China

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Science China Earth Sciences 2015年第8期58卷 1377-1386页

作者： gong ShaoHua YANG GuoTao CHENG XueWu gong shun Sheng XU JiYao LI FaQuan gong Wei WANG JiHong School of Physics and Electronics Engineering Hainan Normal University State Key Laboratory of Space Weather National Space Science Center Chinese Academy of Sciences Laboratory of Optoelectronics Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing Wuhan University

Based on observations from daytime lidars in eastern China,diurnal cycles of the sodium layer over Wuhan(30.5°N,114.6°E)and Beijing(40.5°N,116°E)are *** variations of Na density,root mean square(RMS)layer width,and centroid height of the sodium layer are *** reveal that the large diurnal cycles of the sodium layer are controlled mainly by 24-hr oscillations at the two observation *** diurnal variation of the sodium layer over Wuhan was modulated mainly by tidal perturbations during the lidar observation ***,the diurnal variation over Beijing was controlled principally by photoionization and photochemistry effects during another campaign,and there was little evidence of direct tidal *** comparisons suggest that the diurnal variation of the sodium layer perhaps has obvious regional characteristics across *** variation can be either controlled mainly by tidal perturbations or by photoionization and photochemistry effects in different seasons.

关键词：激光雷达观测日变化钠层武汉北京光化学效应运动控制中国东部

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新兴青年群体价值观变迁及其影响因素分析

中央民族大学学报（哲学社会科学版） 2023年第6期50卷 133-141页

作者：龚顺中国社会科学院社会学研究所北京100732

新兴青年群体是新时代中国青年的重要组成部分,也是实现中华民族伟大复兴的重要力量,其社会关系和思想变动亟须研究。本文使用了中国社会科学院社会学研究所和北京市团市委组织实施的“北京市新兴青年群体状况调查”数据,并辅以“中国... 详细信息

新兴青年群体是新时代中国青年的重要组成部分,也是实现中华民族伟大复兴的重要力量,其社会关系和思想变动亟须研究。本文使用了中国社会科学院社会学研究所和北京市团市委组织实施的“北京市新兴青年群体状况调查”数据,并辅以“中国社会状况综合调查”数据,分析了我国新兴青年群体价值观的变迁状况及其影响因素,特别是关注新兴青年群体价值观的内部差异。研究发现,与其他青年群体相比,新兴青年群体价值观的“后物质主义”倾向更强。此外,这种“后物质主义”价值观在新兴青年群体内部呈现显著分化,职业类型、受教育程度、婚姻状况和性别等因素都对其价值观念产生显著影响。分析认为,我国经济社会结构的深刻变化是形塑新兴青年群体价值观念变迁的重要机制。本文对理解新兴青年这一迅速崛起的群体以及我国社会结构深刻变化状况都具有一定的理论与应用价值。

关键词：新兴青年价值观变迁影响因素内部差异

经济成本、社会文化还是技术进步?——我国绿色低碳生活方式影响因素的问卷实验分析

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山东大学学报:哲学社会科学版 2023年第5期 97-108页

作者：龚顺中国社会科学院社会学研究所北京100732

党的二十大报告指出,要推动形成绿色低碳的生产方式和生活方式。以新能源汽车消费为研究案例,采用问卷实验的研究方法,全面系统讨论经济成本因素、社会文化因素和技术因素对我国城市居民绿色低碳生活方式的影响,对推动全社会形成绿色低... 详细信息

党的二十大报告指出,要推动形成绿色低碳的生产方式和生活方式。以新能源汽车消费为研究案例,采用问卷实验的研究方法,全面系统讨论经济成本因素、社会文化因素和技术因素对我国城市居民绿色低碳生活方式的影响,对推动全社会形成绿色低碳的生产方式和生活方式具有重要意义。分析表明,经济成本因素与技术因素并不能显著影响我国城市居民新能源汽车消费意愿,而社会文化层面新能源汽车的普及则会显著提升居民的新能源汽车消费意愿;进一步分析显示,社会经济地位显著地调节了经济成本因素与新能源汽车消费意愿的关系。以上分析对理解我国居民绿色低碳生活方式转型乃至实现人与自然和谐共生的中国式现代化具有一定的理论和政策启发意涵。

关键词：低碳生活方式消费经济成本社会文化技术进步

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Design,Preparation and Properties of Bio-inspired Hierarchical Structure Yarns with Enhanced Thermal Insulation and Water Transfer Ability

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Chemical Research in Chinese Universities 2021年第3期37卷 558-564页

作者： JIA Yueran gong shun ZHANG Shu ZHAO Shikun QIN Zhen PAN Kai Beijing Key Laboratory of Advanced Functional Polymer Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing100029P.R.China College of Materials Science and Engineering Beijing University of Chemical TechnologyBeijing100029P.R.China

Encouraged by the porous and stable structure of cold-resist animals’hair or feather,bio-inspired hierarchical structure yarns combining polyacrylonitrile(PAN)nanofibers and polypropylene(PP)hollow microfibers have been developed by a modified conjugate electrospinning *** cross-linking has been built to increase fibers adhesion and construct interlayer support for nanofibrous *** nanofibers and hollow microfibers construct a stable porous structure with porosity of 62%,providing excellent thermal insulating ability[temperature difference(|ΔT|)between skin and yarn surface is 4.9℃]as well as good mechanical *** interestingly,the water transfer ability(infiltrate the yarn in 10 s)of synthetic fibers has been improved greatly by the combination of thin diameter nanofibers to the *** is believed that the research lays the foundation for bio-inspired engineering technology in the manufacture of thermal comfort.

关键词： Bio-inspired material Hierarchical structure yarn Thermal insulation Water transfer ability

Data-driven mapping-relationship mining between hardness and mechanical properties of dual-phase titanium alloys via random forest and statistical analysis

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Rare Metals 2024年第2期43卷 829-841页

作者： Hai-Chao gong Qun-Bo Fan Hong-Mei Zhang Xing-Wang Cheng Wen-Qiang Xie Kai Chen Lin Yang Jun-Jie Zhang Bing-Qiang Wei shun Xu School of Materials Science and Engineering Beijing Institute of TechnologyBeijing100081China National Key Laboratory of Science and Technology on Materials Under Shock and Impact Beijing100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing401135China Department of Mechanical and Materials Engineering University of Nebraska-LincolnLincolnNE68588USA

In order to accelerate the research on the property optimization of titanium alloy based on high-throughput methods,it is necessary to reveal the relationship between hardness and other mechanical properties which is still *** this work,taking Ti20C alloy as research object,almost all the microstructure of dual-phase titanium alloys were covered by traversing over 100 heat treatment ***,massive experiments including microstructure characterization and performance test were conducted,obtaining 51,590 pieces of microstructure data and 3591 pieces of mechanical property ***,based on large-scale data-driven technology,the quantitative mapping relationship between hardness and other mechanical properties was deeply *** results of random forest models showed that the correlation between hardness(H)and Charpy impact energy(A_(k))(or elongation,A)was hardly dependent on the microstructure types,while the relationship between H and tensile strength(R_(m))(or yield strength,R_(p0.2))was highly dependent on microstructure ***,combined with statistical analysis,it was found that the relationship between H and Ak(or A)were negatively ***,the relationship between H and strength was positively linear for equiaxed microstructure,and strength was linked to d^(−1/2)(d,equivalent circle diameter)ofα-grains in the form of classical Hall–Petch formula;but for other microstructures,the relationships were ***,the above rules were nearly the same in the rolling direction and transverse ***,a"four-quadrant partition map"between H and R_(p0.2)/R_(m) was established as a versatile material-screening tool,which can provide guidance for on-demand selection of titanium alloys.

关键词： Dual-phase titanium alloy Data-driven Hardness Mapping relationship

Evaluations of Computed Tomography Images and Lumbar Specimens in Mimic Operations of Transverse Rotation Laminoplasty for Lumbar Spinal Stenosis

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Chinese Medical Journal 2015年第2期128卷 191-196页

作者： Xian-Wu Pei Yong-Hui Liang Hui Zhang Zi-shun gong Hong-Xing Song Department of Orthopedics Beijing Fangshan District Liangxiang Hospital Capital Medical University Beijing 102401 China Department of Orthopedics Chinese People's Liberation Army General Hospital Beijing 100853 China Department of Orthopedics Beijing Shijitan Hospital Capital Medical University Beijing 100038 China

Background：Laminectomy is a major method to treat lumbar spinal stenosis （LSS）,but it has lots of flaws such as scar tissue can form around the dura again or spinal *** study aimed to investigate the feasibility of transverse rotation laminoplasty （TRL） in the treatment of ***：The mimic operations of TRL were performed both in the computerized image processing and on the lumbar *** tomography （CT） images were either collected from 80 clinical patients with complaints of lumbago or obtained from 40 sets of lumbar specimens after rebuild of spinal *** the CT image processing the heights of the spinous process and laminae at L3-L5 were *** total length of the spinous process plus one side laminae after the operation was evaluated and compared with the length of inner margin of pedical before the *** areas of the vertebral canal were examined before and after the ***：In the CT images,the height of spinous process of L3,L4 and L5 was 24.74 ± 3.45,22.68 ± 5.96 and 21.54 ± 4.12 mm respectively,and that of laminae was 23.66 ± 2.32,22.68 ± 5.36 and 20.99 ± 3.67 mm respectively （P 〉 0.05）.Distance of inner border of pedical of L3,L4 and L5 was 23.01 ± 6.59,24.65 ± 5.54 and 26.03 ± 7.34 mm respectively,and length of spinous process with laminae of those was 29.76 ± 4.91,29.31 ± 6.43 and 32.53 ± 5.76 mm respectively （P 〈 0.05）.Preoperative area of spinal canals of L3,L4 and L5 was 299.81 ± 10.09,297.66 ± 9.54 and 308.22 ± 10.04 mm2 respectively,and postoperative area was 480.01 ± 9.33,487.32 ± 8.65 and 501.03 ± 9.12 mm2 respectively （P 〈 0.05）.In the human lumbar vertebrae specimen,the data similar to the ***：The excised canal posterior was covered,and the lumbar canals enlarged by *** TRL provided a new alternative in the treatment of LSS.

关键词： Epidural Adhesion Laminae Lumbar Spinal Stenosis Spinous Process

宏观供给、社会经济地位与居民消费——基于全国调查数据的实证分析

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社会学研究 2023年第6期38卷 177-199,M0007页

作者：朱迪龚顺中国社会科学院社会学研究所

扩大消费、推进高质量消费是实现中国式现代化的重要途径。传统经济学和社会学研究强调消费者和消费侧因素,本文引入供给侧视角建构理论框架,从消费侧和供给侧全面系统考察消费行为的结构性约束。本文基于2021年中国社会状况综合调查(C... 详细信息

扩大消费、推进高质量消费是实现中国式现代化的重要途径。传统经济学和社会学研究强调消费者和消费侧因素,本文引入供给侧视角建构理论框架,从消费侧和供给侧全面系统考察消费行为的结构性约束。本文基于2021年中国社会状况综合调查(CSS)数据和区县层面的统计数据分析发现,个体层面的社会经济地位与宏观层面的物质供给均对居民消费具有显著影响;处于较高职业阶层、生活在较高城市化率或者有高铁地区的居民消费支出较高;宏观层面物质供给的提升可显著促进社会经济地位较高居民释放消费潜力。本研究为宏观供给如何影响消费提供了实证支持,并对如何扩大居民消费提供了新的政策思路。

关键词：消费社会学扩大消费物质供给宏观结构社会经济地位