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基于ISM的武器装备维修质量影响因素分析

兵工自动化 2024年第2期43卷 74-77页

作者：黄平奇杨清文卢慧陆军炮兵防空兵学院研究生大队合肥230031 陆军炮兵防空兵学院兵器工程系合肥230031

为提高装备维修质量精细化管理水平,对武器装备维修质量影响因素分析。通过文献综合分析和问卷调查,从维修活动构成和维修活动过程总结出影响武器装备维修质量的8个因素;基于解释结构模型(interpretative structural modeling,ISM)进行... 详细信息

为提高装备维修质量精细化管理水平,对武器装备维修质量影响因素分析。通过文献综合分析和问卷调查,从维修活动构成和维修活动过程总结出影响武器装备维修质量的8个因素;基于解释结构模型(interpretative structural modeling,ISM)进行建模与计算分析,得到影响武器装备维修质量各因素之间的层次逻辑关系,并对其进行分析。结果表明,该分析可为武器装备维修质量管理提供参考。

关键词：装备维修质量管理解释结构模型

Conservation and Utilization of Genetic Resources of Wild Rice in China

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Rice science 2022年第3期29卷 216-224页

作者： yang Ziyi XU Zhijian yang qingwen QIAO Weihua Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081China Rice Research Institute Guangxi Academy of Agricultural SciencesNanning 530007China

The abundant genetic resources of wild rice in China represent a key gene pool for modern rice breeding,contributing to food production and agricultural development in China and *** the 1970s and the 2010s,two national wild rice surveys were carried out in *** than 20000accessions of three species Oryza rufipogon,*** and *** have been conserved ex *** in situ conservation system has also been set up to protect notable and endangered *** review summarized the geographical distribution of wild rice in China,the current status of conservation,the discovery of elite genes,and the application of research into the origin and domestication of rice.

关键词： wild rice conservation valuable gene origin and domestication

光学相干断层成像纵向评估颈动脉支架置入后组织脱垂

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中华神经科杂志 2024年第8期57卷 848-858页

作者：施璇韩云飞许晓慧杨晴雯王芳殷勤刘锐刘新峰南京大学医学院附属金陵医院(东部战区总医院)神经内科南京210002 东南大学医学院第二临床学院(东部战区总医院)神经内科南京210002

目的利用光学相干断层成像(OCT)评估颈动脉支架置入术后组织脱垂的特征,分析不同组织脱垂类型与临床特征、术前斑块形态的相关性,并随访支架内新生内膜增生(NIH)情况。方法收集2018年7月至2019年12月于南京大学医学院附属金陵医院(东部... 详细信息

目的利用光学相干断层成像(OCT)评估颈动脉支架置入术后组织脱垂的特征,分析不同组织脱垂类型与临床特征、术前斑块形态的相关性,并随访支架内新生内膜增生(NIH)情况。方法收集2018年7月至2019年12月于南京大学医学院附属金陵医院(东部战区总医院)神经内科行颈内动脉支架置入术和手术前后OCT评估的病例。通过OCT评估术前斑块特征与术后即刻组织脱垂性质。根据组织脱垂性质分成平滑组织脱垂(STP)和不规则和(或)伴有强衰减信号的组织脱垂(I/HTP)两类。分析I/HTP与临床特征、术前斑块特征间的相关性,并总结NIH情况。结果共纳入29例患者,其中23例(79.3%)伴有组织脱垂,包括9例伴有I/HTP、14例伴有STP。相较STP病变,伴有I/HTP的病变更多为富脂斑块(7/9比2/14,P=0.007),且多伴有斑块破裂(7/9比4/14,P=0.036)。此外,伴有I/HTP病变的组织脱垂纵向总长度相较STP病变似乎更长,但差异无统计学意义[3.0(1.5,4.6)mm比1.1(0.7,3.2)mm,Z=1.294,P=0.201]。共6例患者接受OCT随访,平均随访6.7个月,其中3例的I/HTP病变均发生重度异质型NIH(50.1%~61.8%),而1例的STP病变和2例的没有组织脱垂的病变仅有轻度NIH。结论I/HTP相较STP更常出现在具有较大脂质核心和(或)纤维帽破裂的病变中,提示两者形成机制及预后可能不同,需大样本研究进一步论证。

关键词：体层摄影术,光学相干颈动脉组织脱垂支架新生内膜增生

Electrospinning Preparation ofβ-Cyclodextrin/Glutaraldehyde Crosslinked PVP Nanofibrous Membranes to Adsorb Dye in Aqueous Solution

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Chemical Research in Chinese Universities 2014年第6期30卷 1057-1062页

作者： XIAO Ning WEN Qian LIU qingwen yang Qingbiao LI Yaoxian Colledge of Chemistry Jilin University Changchun 130021 P. R. China

The insoluble β-cyclodextrin/glutaraldehyde crosslinked polyvinylpyrrolidone nanofibrous membranes were prepared by electrospinning technique. The membranes were extensively characterized by various techniques including attenuated total reflectance Fourier transform infrared spectroscopy（ATR-FTIR）, X-ray diffraction（XRD）, scanning electron microscopy（SEM） and UV-visible absorption to correlate membrane characteristics with their performance. The adsorption ability of the nanofibrous membranes was tested by performing extraction of Methyl orange（MO） dye in water. It was observed that β-cyclodextrin incorporated in polyvinylpyrrolidone provided the characteristics of high adsorption capacity of polyvinylpyrrolidone. Results of sorption experiments show that the nanofibrous membranes exhibited an adsorption rate of more than 95% for MO and the MO absorbent was 39.82 mg to per gram of fl-cyclodextrin glutaraldehyde（β-CDXFM） crosslinked PVP under the optimized experimental conditions.

关键词： β-Cyclodextrin Glutaraldehyde Polyvinylpyrrolidone Adsorption Nanofibrous membrane

基于改进YOLOv7的轻量级地铁站台间隙异物检测算法

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北京信息科技大学学报（自然科学版） 2024年第2期39卷 1-8页

作者：杨清雯黄民王文胜周恢北京信息科技大学机电工程学院北京100192 北京科技成果转化服务中心北京100009 清华大学工业工程系北京100084

在客运高峰期,地铁站台屏蔽门与列车门间隙夹人夹物事故常有发生。针对现有的异物入侵检测算法参数量、计算量较大,难以部署在算力和内存资源均有限的边缘设备这一问题,提出了一种基于改进YOLOv7的轻量化算法模型YOLOv7-MobileNetv3。将... 详细信息

在客运高峰期,地铁站台屏蔽门与列车门间隙夹人夹物事故常有发生。针对现有的异物入侵检测算法参数量、计算量较大,难以部署在算力和内存资源均有限的边缘设备这一问题,提出了一种基于改进YOLOv7的轻量化算法模型YOLOv7-MobileNetv3。将YOLOv7的主干网络替换为MobileNetv3-Large网络,以在减小模型大小、降低参数量的同时提升检测速度。根据地铁站台环境搭建实验台,模拟异物入侵,并建立地铁站台异物入侵数据集,训练YOLOv7-MobileNetv3算法模型。实验结果表明,与原YOLOv7模型相比,改进模型的平均精度均值提高2.4百分点,检测速度提高13.32帧/s,模型参数量、计算量分别下降32.03%、60.79%。改进后模型在保证实时性、准确性的同时更为轻量化,可部署到硬件资源有限的边缘设备,用于地铁站台间隙异物检测。

关键词：地铁站台间隙异物检测轻量化网络 YOLOv7 深度可分离卷积

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基于原位安装的某装置液压传感器设计

工业计量 2024年第1期34卷 49-51+55页

作者：杨清文房施东孙吉红吴攀陆军炮兵防空兵学院

针对某火箭炮随动系统液压检测采用传感器存在的连接复杂、功能单一等问题，提出无线液压传感器一体化设计方案。根据设计方案，从敏感元件模块结构、信号采集、信号处理、无线传输、人机交互和壳体等方面进行了选型设计和硬件设计，从... 详细信息

针对某火箭炮随动系统液压检测采用传感器存在的连接复杂、功能单一等问题，提出无线液压传感器一体化设计方案。根据设计方案，从敏感元件模块结构、信号采集、信号处理、无线传输、人机交互和壳体等方面进行了选型设计和硬件设计，从硬件管理、数据采集处理、数据传输、电源管理等方面进行了软件设计，实现基于原位安装的无线液压传感器设计要求。

关键词：传感器随动系统液压压力无线传输

Surveillance and examination of microbial contamination in ice cream in China

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Food Quality and Safety 2022年第3期6卷 446-453页

作者： Lin Yan Xiaoyan Pei Junjie Miao Ying Li Shuran yang Zixin Peng Xiaorong yang Lingling Mei qingwen yang Huan Ren Dajin yang Hongmei Shi Hebei Key Laboratory of Environment and Human Health School of Public HealthHebei Medical UniversityShijiazhuangChina China National Center for Food Safety Risk Assessment(CFSA) BeijingChina Sichuan Provincial Center for Disease Control and Prevention ChengduChina Zhejiang Provincial Center for Disease Control and Prevention HangzhouChina Yunnan Provincial Center for Disease Controland Prevention KunmingChina

This study investigated the microbial contamination of ice cream in China.A total of 2887 ice cream samples were collected from different regions of *** by the aerobic plate count(APC),coliforms,and three foodborne pathogens,Listeria monocytogenes(***),Staphylococcus aureus(***),and Salmonella spp.,was detected in the *** isolates were further analyzed for antibiotic susceptibility and multi-locus sequence typing(MLST).The results showed that APC was more than 10^(5) colony forming units(CFU)/g in 6.10%(176/2887)and coliform was more than 10^(2) CFU/g in 15.69%(453/2887)of all *** positive rates of ***,***,and Salmonella *** 0.66%,0.62%,and 0.10%,*** these,*** contamination was more than 102 CFU/g in two samples,and *** in the positive sample was in the range of 0.3-240 most probable number(MPN)/*** a median of 4.3 MPN/*** hygienic status of the packaged samples was much better than that of the bulk samples(P0.05).For 18 *** strains isolated from ice cream,the resistance rate of nine antibiotics was 5.56%(1/18).By MLST,the *** strains were classified into nine sequence types(STs),of which ST8 was the most common(six isolates).These results indicate that a potential health risk to the public may be caused by ice cream,particularly in susceptiblepopulations.

关键词： Frozen dessert microbial contamination foodborne pathogens antibiotic susceptibility multi-locus sequence typing

Isotopic insights on quantitative assessments of interaction of eco-hydrological processes in multi-scale karst watersheds

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International Soil and Water Conservation Research 2024年第1期12卷 156-170页

作者： Zhuo Hao yang Gao qingwen Zhang Wen Wen Agricultural Clean Watershed Research Group Institute of Environment and Sustainable Development in AgricultureCAASBeijing100081China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchCASBeijing100101China School of Humanities and Social Sciences Beijing Institute of TechnologyBeijing100081China

The dynamics of hydrological processes and the storage mechanisms of karst water resources are the most important issues in karst *** impact of environmental changes on water quantity,and the evaluation and quantification of eco-hydrological processes remain poorly *** this study,high-frequency continuous monitoring in multi-scale karst watersheds in Southwest China combined the approaches of water isotopes and the hybrid single-particle lagrangian integrated trajectory(HYSPLIT)model to identify the recharge mechanisms between atmospheric vapor,rainfall,surface water,and groundwater,and to reveal the interaction of eco-hydrological *** dominant moisture sources in Puding(PD)County were the Indian Ocean(43-69%)and local moisture(24-33%).Theδ^(18)O and deuterium excess(d-excess)values showed a positive correlation indicating that secondary or sub-cloud evaporation was prominent in the wet *** water line-conditioned excess(lc-excess)indicated that karst water interacted with recent precipitation,groundwater,and evaporation across *** to its specific hydrogeological structure,surface water and rainwater have a higher contribution rate to groundwater *** Chenqi stream replenished the Houzhai River mainly in the form of groundwater,with percentages ranging from 38.1 to 93.5%in the wet season,and 47.8-80.1%in the dry *** the Houzhai outlet,surface water and groundwater interconverted frequently with a percentage of 45.6-49.1%.We believe this is the first systematic study to quantify the supply relationship between water vapor transport,rainfall,surface water and groundwater in the Chinese karst zone,making a significant move forward in the field of karst hydrological processes and improving the efficiency of water resource evaluation and management.

关键词： Stable isotope Moisture sources Water cycle Karst watersheds

Nonfunctional alleles of long-day suppressor genes independently regulate flowering time

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Journal of Integrative Plant Biology 2016年第6期58卷 540-548页

作者： Xiao-Ming Zheng Li Feng Junrui Wang Weihua Qiao Lifang Zhang Yunlian Cheng qingwen yang National Key Facility for Crop Gene Resources and Genetic Improvement Institute of Crop Sciences the Chinese Academy of Agricultural Sciences College of Life Sciences Hubei University

Due to the remarkable adaptability to various environments, rice varieties with diverse flowering times have abeen domesticated or improved from Oryza *** knowledge of the genetic factors controlling flowering time will facilitate understanding the adaptation mechanism in cultivated rice and enable breeders to design appropriate genotypes for distinct preferences. In this study,four genes（Hd1, DTH8, Ghd7 and OsPRR37） in a rice long-day suppression pathway were collected and sequenced in 154, 74,69 and 62 varieties of cultivated rice（Oryza sativa）respectively. Under long-day conditions, varieties with nonfunctional alleles flowered significantly earlier than those with functional alleles. However, the four genes have different genetic effects in the regulation of flowering time： Hd1 and Os PRR37 are major genes that generally regulate rice flowering time for all varieties, while DTH8 and Ghd7 only regulate regional rice varieties. Geographic analysis and network studies suggested that the nonfunctional alleles of these suppression loci with regional adaptability were derived recently and independently. Alleles with regional adaptability should be taken into consideration for genetic improvement. The rich genetic variations in these four genes,which adapt rice to different environments, provide the flexibility needed for breeding rice varieties with diverse flowering times.

关键词： Domestication flowering time long-day suppressor genes loss-function allele rice