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Journal of Environmental Sciences 2024年第3期137卷 108-119页

作者： jingming wang Zhiquan Yu Yongfeng wang Yuanyao Chen Lin Xiao Yanjun Zong Qiyuan Feng Lianqi Peng Huiping Zhang Chunyan Liu Institute of Reproductive Health Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Ethylene thiourea(ETU)converted from ethylene bisdithiocarbamate(EBDC)fungicides has aroused great concern because of its prevalence and harmful *** ETU-induced neurotoxicity has been reported,the potential mechanisms remain *** study provided insights into its neurotoxic effects at environmentally relevant concentrations in *** findings showed that embryonic exposure to ETU decreased the hatch rate and delayed somite ***,ETU treatment significantly reduced the dark velocity in the locomotion *** upregulated tendency of the mitogen-activated protein kinases(MAPK)pathway(mknk1,atf4,mapkapk3)screened by transcriptome analysis implied motor neuron degeneration,which was validated by subsequent morphological observation,as axon length and branches were truncated in the 62.5μg/L ETU ***,although the rescue experiment with a p38 MAPK inhibitor(SB203580)successfully ameliorated axon degeneration,it failed to reverse the locomotion *** exploration of transcriptome data revealed the varied expression of presynaptic scaffold protein-related genes(pcloa,pclob,bsna),whose downregulation might impair the neuromuscular junction(NMJ).Therefore,we reasonably suspected that ETU-induced neurobehavioral deficits might result from the combined effects of the MAPK pathway and presynaptic *** this,we highlighted the necessity to take precautions and early interventions for susceptible ETU-exposed populations.

关键词： Ethylene thiourea(ETU) Behavior Neuromuscular junction MAPK signaling pathway Piccolo and bassoon Danio rerio

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住宅小区热源能耗及经济性对比

煤气与热力 2024年第7期44卷 7-9页

作者：杨雪王镜明青岛开源热力设计研究院有限公司山东青岛266000

结合工程实例,对住宅小区热源(区域燃煤锅炉房、空气源热泵)能耗及经济性进行分析。由经济性分析可知,燃煤锅炉房方案、空气源热泵方案的费用年值接近。与区域燃煤锅炉房相比,热泵机组供暖期能耗减少38.15%。因此,热源选取空气源热泵。

关键词：区域燃煤锅炉房空气源热泵能耗经济性

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磁共振检查测量椎体骨质量的研究进展

中国骨质疏松杂志 2024年第10期30卷 1534-1539页

作者：王磊许小多王景明钱颖黄伟敏中国人民解放军联勤保障部队第九六○医院骨病科山东济南250031 中国人民解放军联勤保障部队第九六○医院内分泌科山东济南250031

骨质疏松症目前已是全球性的健康问题,早发现、早诊断对骨质疏松症的治疗及预防相关并发症的发生有着重要意义。目前临床最常用的诊断骨质疏松症的方法是双能X线吸收检测法(DXA)和定量CT(QCT)检查,近年来有学者提出了通过磁共振检查测... 详细信息

骨质疏松症目前已是全球性的健康问题,早发现、早诊断对骨质疏松症的治疗及预防相关并发症的发生有着重要意义。目前临床最常用的诊断骨质疏松症的方法是双能X线吸收检测法(DXA)和定量CT(QCT)检查,近年来有学者提出了通过磁共振检查测量椎体骨质量(vertebral bone quality, VBQ)评分来评估骨密度及诊断骨质疏松症。研究发现VBQ评分和DXA的T值呈中度相关,可用于骨质疏松的筛查及骨质疏松性骨折的预测,对脊柱内固定术后并发症的发生(Cage沉降、螺钉松动、近端交界性后凸等)也有良好的预测价值。本文通过对VBQ相关研究进行综述,就VBQ值的测量方法、VBQ评分同其他诊断骨质疏松方式的相关性、VBQ评分诊断骨质疏松症的效用及VBQ评分在预测脊柱术后并发症的价值等方面,总结VBQ评分评估骨密度及辅助诊断骨质疏松症的方法及临床意义,旨在提高临床医生对VBQ评分的认识,以期更好地应用于临床。

关键词：磁共振椎体骨质量骨质疏松症综述

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太阳能联合空气源热泵热水系统优化设计

煤气与热力 2024年第4期44卷 33-35页

作者：王镜明杨雪青岛开源热力设计研究院有限公司山东青岛266071

针对有生活热水需求的某高铁站公寓楼,对太阳能联合空气源热泵热水系统优化设计进行分析。对关键设备进行重新选型,受控变量减少,运行调节更加便捷。与优化前相比,优化后系统造价降低33.4%。

关键词：太阳能热水系统空气源热泵热水系统优化设计

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GENERATE ROUGH TOOL-PATHS FROM UNORGANIZED POINT-CLOUD DIRECTLY

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Chinese Journal of Mechanical Engineering 2007年第5期20卷 1-4页

作者： WU Shixiong wang Chengyong FAN jingming School of Mechanical and Electrical Engineering Guangdong University of Technology Guangzhou 510006 China

An approach is presented to generate rough interference-free tool-paths directly from massive unorganized data in rough machining that is performed by machining volumes of material in a slice-by-slice manner. Unorganized point-cloud is firstly converted to cross-section data. Then a robust data-structure named tool-path net is constructed to save tool-path data. Optimal algorithms for partitioning sub-cut-areas and computing interference-free cutter-locations are put forward. Finally the tool-paths are linked in a zigzag milling mode, which can be transformed into a traveling sales man problem. The experiment indicates optimal tool paths can be acquired, and high computation efficiency can be obtained and interference can be avoided successfully.

关键词： Rough machining Tool path Unorganized point-cloud

FWENet:a deep convolutional neural network for flood water body extraction based on SAR images

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International Journal of Digital Earth 2022年第1期15卷 345-361页

作者： jingming wang Shixin wang Futao wang Yi Zhou Zhenqing wang Jianwan Ji Yibing Xiong Qing Zhao Aerospace Information Research Institute Chinese Academy of SciencesBeijingPeople’s Republic of China University of Chinese Academy of Sciences BeijingPeople’s Republic of China Hainan Research Institute Aerospace Information Research InstituteChinese Academy of SciencesSanyaPeople’s Republic of China School of Geography Science and Geomatics Engineering Suzhou University of Science and TechnologySuzhouPeople’s Republic of China

As one of the most severe natural disasters in the world,floods caused substantial economic losses and casualties every *** and accurate acquisition of flood inundation extent could provide technical support for relevant departments in the field of flood emergency response and disaster *** the accuracy of existing research works extracting flood inundation extent based on Synthetic Aperture Radar(SAR)images and deep learning methods is relatively low,this study utilized Sentinel-1 SAR images as the data source and proposed a novel model named flood water body extraction convolutional neural network(FWENet)for flood information *** three classical semantic segmentation models(UNet,Deeplab v3 and UNet++)and two traditional water body extraction methods(Otsu global thresholding method and Object-Oriented method)were compared with the FWENet ***,this paper analyzed the water body area change situations of Poyang *** main results of this paper were as follows:Compared with other five water body extraction methods,the FWENet model achieved the highest water body extraction accuracy,its F1 score and mean intersection over union(mIoU)were 0.9871 and 0.9808,*** study could guarantee the subsequent research on flood extraction based on SAR images.

关键词： Deep learning flood water body extraction SAR Poyang Lake

Limits and grading evaluation criteria of tight oil reservoirs in typical continental basins of China

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Petroleum Exploration and Development 2021年第5期48卷 1089-1100页

作者： ZHOU Nengwu LU Shuangfang wang Min HUANG Wenbiao XIAO Dianshi JIAO Chenxue wang jingming TIAN Weichao ZHOU Lei CHEN Fangwen LIU Wei wang Zhixuan Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao 266580China

Based on the microscopic pore-throat characterization of typical continental tight reservoirs in China,such as sandstone of Cretaceous Qingshankou and Quantou formations in Songliao Basin,NE China sandy conglomerate of Baikouquan Formation in Mahu area and hybrid rock of Lucaogou Formation in Jimusaer sag of Junggar Basin,NE China the theoretical lower limit,oil accumulation lower limit,effective flow lower limit and the upper limit of tight oil reservoirs were defined by water film thickness method,oil bearing occurrence method,oil testing productivity method and mechanical balance method,*** analysis method was used to compare the differences in pore-throat structure of different tight reservoirs,determine the grading criterion of tight reservoirs,and analyze its correlation with the limit of reservoir *** results show that the boundary between tight reservoir and conventional reservoir corresponds to the upper limit of physical properties,the boundary of classⅡand classⅢtight reservoirs corresponds to the lower limit of effective flow,the boundary of classⅢand classⅣtight reservoirs corresponds to the lower limit of reservoir forming,and the theoretical lower limit of tight reservoir corresponds to the boundary between tight reservoir and ***,the application results of the grading evaluation criterion show that the tight oil productivity is highly controlled by the type of tight reservoir,and classⅠand classⅡtight reservoirs are the favorable sections for high production of tight oil.

关键词： tight oil tight reservoir reservoir formation limit grading evaluation standard sweet spot evaluation Songliao Basin Junggar Basin

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一种振弦式智能采集仪的可靠性及稳定性分析

城市勘测 2024年第5期 199-204页

作者：于风彬周宏磊张建坤王金明北京市勘察设计研究院有限公司北京100038

针对目前振弦类数据广泛应用自动化采集方式,但自动化采集设备存在功能不全、使用不便且数据可靠性和稳定性差等问题。本文研发设计了一种振弦式智能采集仪,并利用振弦式智能采集仪与手动频率读数仪在不同场景下同时间进行数据采集测试... 详细信息

针对目前振弦类数据广泛应用自动化采集方式,但自动化采集设备存在功能不全、使用不便且数据可靠性和稳定性差等问题。本文研发设计了一种振弦式智能采集仪,并利用振弦式智能采集仪与手动频率读数仪在不同场景下同时间进行数据采集测试,通过对比分析两种方式采集得到的数据结果的吻合情况,进一步分析振弦式智能采集仪工作的稳定性。结果表明,本文研发设计的振弦式智能采集仪功能全面且采集数据可靠且较为稳定,满足实际工程的需求。

关键词：振弦传感器智能采集仪自动化可靠性稳定性

基于ANSYS的高温气冷堆主氦风机电机的抗震分析

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防爆电机 2024年第4期59卷 25-29页

作者：盛志伟张继革王泽宇王景明周世杰袁衍杰哈尔滨电气动力装备有限公司黑龙江哈尔滨150060 上海交通大学上海200240

高温气冷堆核电站主氦风机高温气冷堆核电站关键设备,主氦风机电机在地震工况下,可能会发生共振或定转子碰磨,给主氦风机的安全带来较大的危险。需要对主氦风机在地震有效载荷、产品重量、扭矩和单边磁拉力等多种载荷组合作用下进行抗... 详细信息

高温气冷堆核电站主氦风机高温气冷堆核电站关键设备,主氦风机电机在地震工况下,可能会发生共振或定转子碰磨,给主氦风机的安全带来较大的危险。需要对主氦风机在地震有效载荷、产品重量、扭矩和单边磁拉力等多种载荷组合作用下进行抗震性能计算分析。首先建立了主氦风机整体有限元模型,进行了模态分析,然后采用响应谱法,计算了主氦风机整体的等效应力及定转子间隙相对变化,根据规范进行了安全评定。其次,对转子动力学进行分析了,获得了转子临界转速。根据计算结果,可见在上述载荷作用下,电机整体应力状况符合抗震要求。电机临界转速位于一阶和二阶临界转速之间,需要引起注意。

关键词：高温气冷堆主氦风机电机抗震分析 ANSYS

Blockchain-Based MCS Detection Framework of Abnormal Spectrum Usage for Satellite Spectrum Sharing Scenario

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China Communications 2024年第2期21卷 32-48页

作者： Ning Yang Heng wang jingming Hu Bangning Zhang Daoxing Guo Yuan Liu College of Communications Engineering Army Engineering UniversityNanjing 210007China

In this paper, the problem of abnormal spectrum usage between satellite spectrum sharing systems is investigated to support multi-satellite spectrum coexistence. Given the cost of monitoring, the mobility of low-orbit satellites, and the directional nature of their signals, traditional monitoring methods are no longer suitable, especially in the case of multiple power level. Mobile crowdsensing(MCS), as a new technology, can make full use of idle resources to complete a variety of perceptual tasks. However, traditional MCS heavily relies on a centralized server and is vulnerable to single point of failure attacks. Therefore, we replace the original centralized server with a blockchain-based distributed service provider to enable its security. Therefore, in this work, we propose a blockchain-based MCS framework, in which we explain in detail how this framework can achieve abnormal frequency behavior monitoring in an inter-satellite spectrum sharing system. Then, under certain false alarm probability, we propose an abnormal spectrum detection algorithm based on mixed hypothesis test to maximize detection probability in single power level and multiple power level scenarios, respectively. Finally, a Bad out of Good(BooG) detector is proposed to ease the computational pressure on the blockchain nodes. Simulation results show the effectiveness of the proposed framework.

关键词： blockchain hypothesis test mobile crowdsensing satellite communication spectrum sharing