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SPS措施对出口农产品质量升级的影响——基于前沿距离模型的实证分析

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国际贸易问题 2018年第10期 45-57页

作者：董银果黄俊闻华东理工大学商学院上海大学经济学院

中国经济已从高速增长转向高质量增长,提高出口产品质量,增加附加值是中国农业可持续发展的必然选择。文章选取2005—2012年日本HS9位编码农产品进口数据,在采用嵌套Logit模型度量各国出口到日本市场农产品质量水平的基础上,使用前沿距... 详细信息

中国经济已从高速增长转向高质量增长,提高出口产品质量,增加附加值是中国农业可持续发展的必然选择。文章选取2005—2012年日本HS9位编码农产品进口数据,在采用嵌套Logit模型度量各国出口到日本市场农产品质量水平的基础上,使用前沿距离模型(ABGHP)检验日本卫生与植物检疫(SPS)措施对各国出口农产品质量升级的影响。结果显示:当日本SPS措施的标准提高后,促进了各出口国农产品的质量提升,尤其是技术落后的农产品较技术前沿的农产品实现较大的质量升级;非OECD国家技术落后企业在"熊彼特租金"的激励下加速创新,而OECD国家的技术前沿企业因自身标准较高致使创新下降。故在面对SPS等技术性贸易措施时,发展中国家出口企业应大胆创新,通过对发达国家的技术模仿与再创新,在技术溢出效应与后发优势的作用下,缩小产品质量差距。

关键词：农产品质量质量升级前沿距离模型嵌套Logit模型 SPS措施

Low cost and low density chloride solid electrolyte for all solid state cathode with high active material ratio

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Nano Research 2024年第10期17卷 8826-8833页

作者： Hao-Yuan Tan Mei-Yu Zhou Zhongyuan huang Jin-Da Luo Jing-Tian Yang Jian-Ping Wang Ye-Chao Wu Xiao-Bin Cheng Zi-Wei Wang Xu-Dong Hao Linjun Wang Ke Gong Yi-Chen Yin yinguo Xiao Hong-Bin Yao Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026China Department of Applied Chemistry University of Science and Technology of ChinaHefei 230026China School of Advanced Materials Peking University Shenzhen Graduate SchoolShenzhen 518055China

Chloride solid electrolytes(SEs)have attracted widespread attention due to their high room-temperature ionic conductivity and excellent cathode ***,the conventionally selected central metal elements(e.g.,In,Y and Ta)are usually rare and heavy,inevitably causing the high cost and high density of the obtained chloride ***,by choosing abundant and light Mg and Al as central metal elements,we develop a cheap and low density Li_(1.2)Mg_(0.95)Al_(0.3)Cl_(4)SE for high active material ratio in all solid state *** replacement of Mg^(2+)by Al^(3+)in the framework yields vacancies and lowers the non-lithium metal ions occupancy at Mg/Li co-occupied 16d site,effectively relieving the blocking effects by Mg^(2+)in the pristine spinel Li_(2-2x)Mg_(1+x)Cl_(4).Thus,a significantly improved room-temperature conductivity of 3.08×10^(-4)S·cm^(-1)is achieved,two orders of magnitude higher than that of Li_(1.2)Mg_(1.4)Cl_(4).More attractively,its low density of only 1.98 g·cm-3 enables low SE mass ratio in cathodes(only 16 wt.%)with still effective electrolyte/cathode contact and lithium-ion conduction *** charged to potential of 4.30 V,the asfabricated Li_(1.2)Mg_(0.95)Al_(0.3)Cl_(4)-based solid lithium battery with uncoated NCM523 cathode can be cycled for over 100 cycles with a capacity retention of 86.68%at room temperature.

关键词： chloride solid electrolytes low cost low density Li+conductivities

A Combined Clustering and Image Mapping based Point Cloud Segmentation for 3D Object Detection

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A Combined Clustering and Image Mapping based Point Cloud Se...

第30届中国控制与决策会议

作者： Fangchao Hu Zhen Tian yinguo Li Shuai huang Mingchi Feng School of Computer Science and Technology Chongqing University of Posts and Telecommunications School of Automation Chongqing University of Posts and Telecommunications School of Advanced Manufacturing Engineering Chongqing University of Posts and Telecommunications

3D Object Detection is important to avoid collision and path planning in field of autonomous vehicle. In this paper, we present a combined clustering and image mapping-based algorithm to segment 3D point cloud. It not only provides a dependable initial value as the seeds to cluster the class of objects, but also avoid the pre-trained classifier to detect the objects. We get an accurate 3D object detection result using our proposed algorithm. The proposed algorithm can reduce the computation complexity at the step of determining bounding area in 2D image and produce the initial center of cluster of each object at the step of segmentation in 3D point cloud. The experiment states that the proposed algorithm can improve the accuracy and feasibility of object detection.

关键词： 3D obstacle detection point cloud cluster image mapping point cloud segmentation

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中国与欧美输电网安全稳定标准比对

电力系统自动化 2014年第1期38卷 127-133页

作者：李鹏黄河吴小辰黄媚杨银国李凌南方电网电力调度控制中心广东省广州市510623 深圳供电局电力调度控制中心广东省深圳市518001 广东电网电力调度控制中心广东省广州市510600 广西电网电力调度控制中心广西壮族自治区南宁市530023

电网的安全稳定标准是电网规划和运行的基本准则,中国电网自20世纪80年代以来执行《电力系统安全稳定导则》,对不同严重程度的故障分级设防,为电网高速发展期间保持安全稳定发挥了重要作用。2011年国务院颁布的《电力安全事故应急处置... 详细信息

电网的安全稳定标准是电网规划和运行的基本准则,中国电网自20世纪80年代以来执行《电力系统安全稳定导则》,对不同严重程度的故障分级设防,为电网高速发展期间保持安全稳定发挥了重要作用。2011年国务院颁布的《电力安全事故应急处置和调查处理条例》,从负荷损失的角度提出了新的要求,电网公司需重新审视目前执行的安全稳定标准。文中介绍了西方主要发达国家电网执行的安全稳定标准,将其与中国的标准进行比对分析,指出中国下一步修订《电力系统安全稳定导则》需要重点学习和借鉴的内容。

关键词：输电规划运行安全稳定标准

Vehicle Tracking System for Intelligent and Connected Vehicle Based on Radar and V2V Fusion

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Vehicle Tracking System for Intelligent and Connected Vehicl...

第30届中国控制与决策会议

作者： Zhen Tian Yufeng Cai Shuai huang Fangchao Hu yinguo Li Ming Cen School of Computer Science and Technology Chongqing University of Posts and Telecommunications School of Automation Chongqing University of Posts and Telecommunications School of Advanced Manufacturing Engineering Chongqing University of Posts and Telecommunications

The environment perception plays a significantly role in intelligent vehicles and the advanced driver assistance system（ADAS）, which enhances the driving safety and convenience. Target tracking is one of the key technologies of environment perception. The on-board sensors such as cameras and radar are commonly used for target tracking while they have limitations in terms of detection range and angle of view. One way to overcome the perception limitations of on-board ranging sensors by incorporating the vehicle-to-vehicle（V2 V） communication. This paper proposes a vehicle tracking system which fuse the radar and V2 V information to improve the target tracking accuracy. The proposed system integrates the radar, GPS and DSRC communication equipment. The GPS and radar are utilized to obtain its own position information and the position information of nearby vehicles. The proposed system also resolves the problem of data association in multiple target tracking measurements by other connected vehicles’ identity information. With the association measurements, a Kalman filter is used to improve the accuracy of target tracking. An assessment of tracking system in real road environment shows that the proposed fusion approach for target tracking can reduce the data association error and improve the vehicle target tracking accuracy.

关键词： Intelligent vehicle target tracking sensor fusion V2V

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高职院校理事会建设的思考

工业技术与职业教育 2017年第2期15卷 69-71页

作者：黄振菊杨印国唐山工业职业技术学院河北唐山063299 唐山市职业教育中心河北唐山063299

理事会(或董事会)是高职院校治理过程中不可或缺的组织机构之一。针对高职教育的特点,基于资源依赖理论、利益相关者理论,提出高职院校应建立跨界、多元参与的理事会;高职院校应主动作为发挥主导作用,以自身的影响力提高理事会的凝聚力... 详细信息

理事会(或董事会)是高职院校治理过程中不可或缺的组织机构之一。针对高职教育的特点,基于资源依赖理论、利益相关者理论,提出高职院校应建立跨界、多元参与的理事会;高职院校应主动作为发挥主导作用,以自身的影响力提高理事会的凝聚力,增强理事会的实效性,促进产教融合,提升治理能力。

关键词：理事会资源合作服务

基于空间分辨中子衍射方法的锂离子电池电化学反应均匀性研究

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储能科学与技术 2024年第1期13卷 72-81页

作者：童文欣黄中垣王睿邓司浩何伦华肖荫果北京大学深圳研究生院广东深圳518055 散裂中子源科学中心广东东莞523803 中国科学院物理研究所北京100190

锂离子电池作为一种具有复杂组成的电化学器件,其电化学反应的均匀性受多种因素影响,包括正负极材料成分、电池结构和制备工艺等。电池的局部电化学反应不均匀性将导致局部失效加剧,进而影响其电化学性能、循环稳定性和安全性。鉴于电... 详细信息

锂离子电池作为一种具有复杂组成的电化学器件,其电化学反应的均匀性受多种因素影响,包括正负极材料成分、电池结构和制备工艺等。电池的局部电化学反应不均匀性将导致局部失效加剧,进而影响其电化学性能、循环稳定性和安全性。鉴于电池拆解分析不但会破坏其电芯结构,改变电极材料的化学性质,进而影响分析结果的准确性,本工作介绍并应用无损的空间分辨飞行时间中子衍射方法,对大尺寸软包锂离子电池电化学反应分布的均匀性展开研究。通过采集和分析毫米尺度测试区域的中子衍射数据,获得了全电池在初始状态和失效状态下锂离子嵌入石墨负极过程中的相变信息,并构建了全电池不同位置处的石墨负极多相含量分布和归一化后负极中的锂浓度分布图。此外,结合高精度三维X射线断层扫描方法,从电池厚度、电流密度和电解质浓度等多个角度,分析和探讨了这些因素对锂离子电池电化学反应均匀性的影响。空间分辨中子粉末衍射方法可以对不同类型和不同形状的金属离子电池中的电化学反应均匀性进行快速直接的检测,为电池结构性能优化和技术改进提供强有力的技术支持。

关键词：空间分辨中子衍射方法锂离子电池材料锂浓度分布电化学反应均匀性

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Vibration-reduced anxiety-like behavior relies on ameliorating abnormalities of the somatosensory cortex and medial prefrontal cortex

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Neural Regeneration Research 2024年第6期19卷 1351-1359页

作者： Afzal Misrani Sidra Tabassum Tintin Wang Huixian huang Jinxiang Jiang Hongjun Diao Yanping Zhao Zhen huang Shaohua Tan Cheng Long Li Yang South China Normal University-Panyu Central Hospital Joint Laboratory of Translational Medical Research Panyu Central HospitalGuangzhouGuangdong ProvinceChina School of Life Sciences Guangzhou UniversityGuangzhouGuangdong ProvinceChina School of Life Sciences South China Normal UniversityGuangzhouGuangdong ProvinceChina Guangzhou Hongai Cultural Development Inc.GuangzhouGuangdong ProvinceChina yinguo Health Management Team GuangzhouGuangdong ProvinceChina College of Biophotonics South China Normal UniversityGuangzhouGuangdong ProvinceChina

Tibetan singing bowls emit low-frequency sounds and produce perceptible harmonic tones and vibrations through manual *** sounds the singing bowls produce have been shown to enhance relaxation and reduce ***,the underlying mechanism remains *** this study,we used chronic restraint stress or sleep deprivation to establish mouse models of anxiety that exhibit anxiety-like *** then supplied treatment with singing bowls in a bottomless cage placed on the top of a *** found that unlike in humans,the combination of harmonic tones and vibrations did not improve anxietylike behaviors in mice,while individual vibration components ***,the vibration of singing bowls increased the level of N-methyl-D-aspartate receptor 1 in the somatosensory cortex and prefrontal cortex of the mice,decreased the level ofγ-aminobutyric acid A(GABA)receptorα1 subtype,reduced the level of CaMKII in the prefrontal cortex,and increased the number of GABAergic *** the same time,electrophysiological tests showed that the vibration of singing bowls significantly reduced the abnormal low-frequency gamma oscillation peak frequency in the medial prefrontal cortex caused by stress restraint pressure and sleep *** from this study indicate that the vibration of singing bowls can alleviate anxiety-like behaviors by reducing abnormal molecular and electrophysiological events in somatosensory and medial prefrontal cortex.

关键词： anxiety medial prefrontal cortex parvalbumin interneuron pressure somatosensory cortex Tibetan singing bowl vibration

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悬崖过山车结构设计

冶金设备 2022年第6期 40-46页

作者：谢印国黄羽尚珂李宝北京中冶设备研究设计总院有限公司北京100029

以有限元仿真模拟分析的方法,分析了悬崖过山车的结构特点和功能特征,利用碰撞试验的方法验证了设备的安全性。悬崖过山车具有结构简单、占地面积小等结构特点,和安全性高、易于操作和维护、惊险刺激等功能特点;结果表明,悬崖过山车具... 详细信息

以有限元仿真模拟分析的方法,分析了悬崖过山车的结构特点和功能特征,利用碰撞试验的方法验证了设备的安全性。悬崖过山车具有结构简单、占地面积小等结构特点,和安全性高、易于操作和维护、惊险刺激等功能特点;结果表明,悬崖过山车具有适合悬崖边以及高层建筑物上方安装、与传统过山车结构不同、乘坐体验不同、具有显著的竞争力等优点。该设备打破了国外技术垄断,填补国内技术空白,为行业的发展提供技术支撑,具有一定推广意义。

关键词：悬崖过山车碰撞试验仿真计算