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The First International Conference on Computers and Computing Technologies in Agriculture

作者： yan zhenglong~(1 2 *) HUANG QIANG~1 TIAN HUIFANG~3 JIN XIAOCHUN~4 1 College of Hydraulic and Electrical Engineering Xi’an University of Technology 5 South Jinhua Road Xi’an City 710048 PR China 2 Aerial Photogrammetry and Remote Sensing Bureau 3 Jianxi Road Xi’an City 710054 PR China 3 Baoji University of Arts and Sciences 44 Baoguang Road Baoji City 721007 PR China 4 Ordnance Engineering College 97 Heping Road Shijiazhuang City 050003 PR China

＜正＞The ecological environment in the Tarim River Basin is extremely *** ecological problems resulting from local economic development in this region have been a hot topic for the ecological *** is a new trend to use information technologies to monitor the ecological environment dynamically by means of the modern information *** meet the constant requirements of long-term monitoring of a region ecological environment,this paper focuses on the vegetation coverage and land desertification on the basis of the information technologies of remote sensing（RS）,geographic positioning systems（GPS）, geographic information systems（GIS）,and data warehouse,applying the theory of the integrative spatial and attribute data,seamless integration of multi-source *** ecological environment for the lower reaches of the Tarim River is analysed qualitatively and *** investigated database is established and managed through multisource and multi-type massive data,which are collected from three periods of the remote sensing images and background data in 1999,2002 and 2004, *** methods of system classification, remote sensing interpretation,vegetation coverage, conversion models construction,and massive data built database are applied to analyse the data concerned during the dynamically monitoring the ecological environment in the Tarim River Basin. The results show that the vegetation coverage has increased gradually each year after the emergent water transportation project was started,whereas the desertification area has decreased,some sand areas have obviously *** speed of improvement in the east part of the fiver has been higher than in the *** ecological environment in the lower reaches of the Tarim River has tended to improve after the emergent water transportation project in the lower reaches of the Tarim River *** conclusion, the emergent water delivery plays a decisive and significant role in promoti

关键词： database ecological environment remote sensing Tarim River

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Microscopic mechanism of plasmon-mediated photocatalytic H_(2) splitting on Ag-Au alloy chain

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Chinese Physics B 2024年第3期33卷 322-326页

作者：宋玉慧芦一瑞郭阿鑫曹逸飞李金萍付正坤严蕾张正龙 School of Physics and Information Technology Shaanxi Normal UniversityXi'an 710119China

Alloy nanostructures supporting localized surface plasmon resonances has been widely used as efficient photocatalysts,but the microscopic mechanism of alloy compositions enhancing the catalytic efficiency is still *** using time-dependent density functional theory(TDDFT),we analyze the real-time reaction processes of plasmon-mediated H_(2) splitting on linear Ag-Au alloy chains when exposed to femtosecond laser *** is found that H_(2) splitting rate depends on the position and proportion of Au atoms in alloy chains,which indicates that specially designed Ag-Au alloy is more likely to induce the reaction than pure Ag ***,more electrons directly transfer from the alloy chain to the anti-bonding state of H_(2),thereby accelerating the H_(2) splitting *** results establish a theoretical foundation for comprehending the microscopic mechanism of plasmon-induced chemical reaction on the alloy nanostructures.

关键词： plasmon photocatalysis time-dependent density functional theory(TDDFT)

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Plasmon-induced nonlinear response on gold nanoclusters

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Chinese Physics B 2024年第4期33卷 36-39页

作者：宋玉慧曹逸飞黄思晨李凯超杜如海严蕾付正坤张正龙 School of Physics and Information Technology Shaanxi Normal UniversityXi'an 710119China

The plasmon-induced nonlinear response has attracted great attention in micro-nano optics and optoelectronics applications,yet the underlying microscopic mechanism remains *** this study,the nonlinear response of gold nanoclusters when exposed to a femtosecond laser pulse was investigated using time-dependent density functional *** was observed that the third-order tunneling current was augmented in plasmonic dimers,owing to a greater number of electrons in the dimer being excited from occupied to unoccupied *** findings provide profound theoretical insights and enable the realization of accurate regulation and control of nonlinear effects induced by plasmons at the atomic level.

关键词： plasmon nonlinear optics time-dependent density functional theory(TDDFT)

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Surface enhanced fluorescence by porous alumina with nanohole arrays

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Science China(Physics,Mechanics & Astronomy) 2012年第5期55卷 767-771页

作者： ZHANG zhenglong ZHENG HaiRong DONG Jun yan XiaoQing SUN Yu XU HongXing College of Physics and Information Technology Shaanxi Normal University Xi＇an 710062 China Beijing National Laborator/for Condensed ~Matter Physics and Institute of Physics Chinese Academy of Sciences Beijing 100190 China

The fluorescence enhancement of Rhodanfine 6G （Rh6G） fluorophore in the close vicinity of porous alumina film with ordered nanohole arrays is investigated. Experimental observations show that the nonmetallic substrate with hole arrays enhances the fluorescence intensity. By comparing the fluorescence emissions that are excited with 325 nm and 532 nm, better fluorescence enhancement is obtained with excitation at a shorter wavelength. The study suggests that higher fluorescence excitation effi- ciency due to the energy transfer from oxygen vacancies to Rh6G fluorophore molecules is responsible for better fluorescence enhancement. The contribution of the scattering of nanohole arrays to the fluorescence enhancement is also proposed based on the intensity increase and reduced lifetime when the energy transfer from oxygen vacancy is absent. The result of the current study is useful for developing non-metal substrates in the study of spectroscopic enhancement, and is expected to advance the applications of porous alumina to microanalysis.

关键词： porous alumina SEF Rh6G oxygen vacancy

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High-temperature Tensile Behavior of Laser Welded Ti-22Al-25Nb Joints at Different Temperatures

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Journal of Wuhan University of Technology(Materials Science) 2020年第6期35卷 1116-1121页

作者： ZHANG Kezhao LEI zhenglong CHEN yanbin yan Chunyan FU Qiang BAO Yefeng College of Mechanical and Electrical Engineering Hohai UniversityChangzhou 213022China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China

The high-temperature tensile behavior of laser welded Ti-22Al-25Nb (at%) joints was investigated at 500,650,800,and 1 000 ℃.The temperatures for tensile tests were selected according to the phase transformation sequence of Ti2AlNb-based *** temperatures lower than the B2+O phase field (500 ℃) and higher than the B2+O phase field (1 000 ℃),the joints fracture in the base metal in ductile fracture *** contrast,the joints exhibit obvious high-temperature brittleness in the B2+O phase field (650 °C and 800 ℃).Heat treatments were conducted with respect to the thermal history of tensile *** microcracks along the grain boundary of B2 phase are found in the fusion zone after the heat treatments at 650 ℃ and 800 ℃.The high-temperature brittleness at 650 ℃ and 800 ℃ is attributed to the B2→O transformation along the grain *** stress concentration caused by the volume change of B2→O transformation also contributes to the high-temperature brittleness of laser welded Ti-22Al-25Nb joints.

关键词： high-temperature tensile behavior laser welding Ti2AlNb-based alloys phase transformation

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全过程深度融合的医疗器械制图实践教学探索

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继续医学教育 2024年第9期38卷 42-45页

作者：孟青云陈正龙严加勇孙丽萍杨晖上海健康医学院医疗器械学院上海201318 上海穿戴式医疗技术与器械工程研究中心智能医疗器械创新设计实验室上海201318

在新工科和新医科的引领下,本研究深入融合《“十四五”医药工业发展规划》、“十三五医疗器械科技创新专项规划”和《健康中国2030规划纲要》等国家政策,构建了医工交叉的医学器械制图实践教学框架。通过引入新案例、新技术和创新设计... 详细信息

在新工科和新医科的引领下,本研究深入融合《“十四五”医药工业发展规划》、“十三五医疗器械科技创新专项规划”和《健康中国2030规划纲要》等国家政策,构建了医工交叉的医学器械制图实践教学框架。通过引入新案例、新技术和创新设计竞赛,旨在培养学生的工程思维,使其具备应对医疗器械设计与创新挑战的能力。与“十三五”规划相结合,特别关注最新医学器械科技趋势,注重引入最新的制图技术,以确保学生能够跟上科技创新步伐,并实现学生学习案例的时域高新技术融合。同时,密切融入《健康中国2030规划纲要》的指导思想,将医学器械制图实践教学有机纳入医学人才培养整体规划,通过全过程深度融合的实践教学,培养医学生具备创新精神、团队协作和实际问题解决能力,以适应未来医学领域的发展需求。在实践实施中,学科竞赛与课程教学相融合,为医学人才提供了更有力的创新培养支持,不仅在医学器械制图实践教学中进行了全新探索,同时紧密契合新工科、新医科理念,对国家政策进行了深度引导。

关键词：医疗器械制图全过程医工交叉融合实践教学生物医学工程专业

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Quantifying plasmon resonance and interband transition contributions in photocatalysis of gold nanoparticle

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Chinese Physics B 2021年第7期30卷 456-460页

作者： Liang Dong Chengyun Zhang Lei yan Baobao Zhang Huan Chen Xiaohu Mi Zhengkun Fu zhenglong Zhang Hairong Zheng School of Physics and Information Technology Shaanxi Normal UniversityXi'an 710062China

Localized surface plasmon has been extensively studied and used for the photocatalysis of various chemical ***,the different contributions between plasmon resonance and interband transition in photocatalysis has not been well ***,we study the photothermal and hot electrons effects for crystal transformation by combining controlled experiments with numerical *** photo-excitation of Na YF4:Eu^(3+)@Au composite structure,it is found that the plasmonic catalysis is much superior to that of interband transition in the experiments,owing to the hot electrons generated by plasmon decay more energetic to facilitate the *** emphasize that the energy level of hot electrons plays an essential role for improving the photocatalytic *** results provide guidelines for improving the efficiency of plasmonic catalysis in future experimental design.

关键词： surface plasmon interband transition hot electron photothermal effect

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Cloning and characterization of a novel low molecular weight glutenin subunit gene from wheat cultivar R146

Cloning and characterization of a novel low molecular weight...

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中国生物化学与分子生物学会第十届会员代表大会暨全国学术会议

作者： Benju yan Li Chen zhenglong Ren Sichuan Agricultural University

Low-molecular-weight glutenin subunit(LMWGS) has a significant influence on the processing quality of the end-use products of common *** characterize the LMWGS genes,gene specific PCR primers were designed to amplify four common wheat *** of LMWGS sequences were obtained,five of them are silent,and the other fourteen sequences have completed reading frames, except LMW-B4,others sequences of LMW-GS have the complete structures:twenty amino acids signal peptide(Sig), a thirteen amino acids N-terminal conserved region of nonduplicate (I),a high degree of central repeat region with 70

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1957—2015年红碱淖湖水域面积时空变化监测及驱动力分析

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农业工程学报 2018年第2期34卷 265-271页

作者：王莺闫正龙高凡中国地震局第二监测中心西安710054 陕西测绘地理信息局西安710054 新疆农业大学水利与土木工程学院乌鲁木齐830052

选取红碱淖湖泊1957-2015年近60 a合计15期DRG、DLG、DOM、遥感影像、纸质地图等基础数据和遥感影像数据,辅以野外调绘资料及相关属性数据,综合利用RS、GIS、GPS等技术,采用空间数据处理、信息提取解译、海量数据建库、集成管理分析等方... 详细信息

选取红碱淖湖泊1957-2015年近60 a合计15期DRG、DLG、DOM、遥感影像、纸质地图等基础数据和遥感影像数据,辅以野外调绘资料及相关属性数据,综合利用RS、GIS、GPS等技术,采用空间数据处理、信息提取解译、海量数据建库、集成管理分析等方法,分析了研究区近60 a水域面积时空变化特征及趋势,同时结合同时期气候变化和人类活动因素,探讨了引起湖泊水域面积时空变化的主要原因。结果表明:近60 a研究区水域面积发生了显著变化:1)1957-1976年,水域面积持续增长并达到近60 a极大值,由1957年的37.6 km^2增至1976年的55.53 km^2,增幅高达47.69%,以湖泊北侧、南右侧区域增幅速度相对较快,其他区域次之;2)1977-1999年,水域面积整体状况稳定,维持在50 km^2左右;3)2000-2015年,水域面积呈逐年萎缩趋势,由1999年的50.27 km^2减少至2015年的31.05 km^2,减幅达38.23%,除七卜素河附近水域在2005年出现逆转面积略有增加外,其他区域均呈现规律性萎缩趋势;总体来看,近60 a间红碱淖湖泊水域面积演变过程依据水域面积年间变化率可以划分为扩张期(1957-1976)、稳定期(1977-1999)、萎缩期(2000-2015)3个阶段,总体呈现萎缩趋势;气候暖干化趋势是影响扩张期和稳定期湖泊水域面积变化的主要因素,气候暖干化叠加人类活动(上游水利工程修建、煤矿开采、环湖路面建设、灌溉耗水等)是造成萎缩期湖泊水域面积变化的关键因素。

关键词：遥感监测气候变化红碱淖湖泊时空变化人类活动

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Iodized salt consumption and iodine deficiency status in China: a cross-sectional study

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Global Health Journal 2017年第2期1卷 23-37页

作者： Lijun Fan Xiaohui Su Hongmei Shen Peng Liu Fangang Meng Jun yan zhenglong Lei Shubin Zhang Yunyou Gu Shoujun Liu Dianjun Sun Center for Endemic Disease Control Chinese Center for Disease Control and PreventionHarbin Medical UniversityHarbinHeilongjiang 150081China Bureau of Disease Prevention and Control National Health and Family Planning Commission of the People's Republic of ChinaBeijing 100044China National Reference Laboratory of IDD National Institute for Nutrition and HealthChinese Center for Disease Control and PreventionBeijing 100050China

Objective:To monitor iodized salt consumption and evaluate iodine deficiency status in 2014 in *** and Methods:In 2014,a nationwide cross-sectional survey was conducted in 31 provinces (in this study,provinces,autonomous regions and municipalities in China's Mainland were named as provinces).Probability proportional to size sampling method was adopted to recruit children ages 8-10 and pregnant women.47,467 children's and 18,994 pregnant women's urine samples were collected and 47,706 children's thyroid volumes were *** content in salt was determined with 46,900 edible salt samples from children's households;urinary iodine concentration (UIC) was tested from children and pregnant women's urine samples;thyroid volume of children was assessed by ***:The national coverage rate of iodized salt and consumption rate of qualified iodized salt were 96.3％ and 91.5％,*** iodine content in iodized salt was 25.2 mg/*** 22 of 31 provinces,the provincial coverage rates of iodized salt were over 95％.And consumption rates of qualified iodized salt were more than 90％ in 21 *** this study,the national median urinary iodine concentration (MUIC) of children in China was 197.9 μg/*** the provincial level,MUIC of children in 19 provinces was 100-199 μg/L,which in 12 provinces was 200-299 μg/*** national MUIC of pregnant women in 2014 was 154.6 μg/L,slightly higher than the lower limit of the WHO criteria for adequate (150-249 μg/L).At the provincial level,MUIC of pregnant women in 18 provinces was 100-149 μg/L,which in 13 provinces was 150-249 μg/*** national prevalence of goiter among children in 2014 was 2.6％,of which only Shandong province (5.6％) exceeded the national standard (5％).Conclusions:In China,iodine deficiency disorders (IDD) has been eliminated since *** in 2014,the IDD-free status still remained.

关键词： iodized salt median urinary iodine concentration prevalence of goiter iodine deficiency disorders the seventh national survey the coverage rate of iodized salt consumption rate of qualified iodized salt

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