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Experimental investigation on oil-gas separator of air-conditioning systems

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Frontiers in Energy 2019年第2期13卷 411-416页

作者： Dianbo XIN Shuliang HUANG Song YIN yuping deng Wenqiang ZHANG Qingdao Hisense Hitachi Air-conditioning Systems Co. Ltd.Qingdao 266071China

The oil-return system plays an important role in the variable refrigerant flow (VRP) systems because it ensures the reliable operation of the VRF systems. The oil-gas separator is the most essential component of the oil- return system, and the separation efficiency of the separator directly influences the performance of the VRF systems. Therefore, in this paper, a test rig was built to measure the oil discharge ratio of the compressor and the separation efficiency of the oil-gas separator. A sound velocity transducer was used to measure the oil mass concentration instantaneously, because the sound velocity was changed with the mass ratio of oil to refrigerant. The separation efficiency of the separator could be obtained by comparing the mass fraction of oil to refrigerant before and after the separator was connected to the system.

关键词： variable refrigerant flow system oil-gas separator separation efficiency

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湘南地区大棚辣椒秋延后及春季再生栽培技术

长江蔬菜 2024年第9期 25-27页

作者：邓玉萍邓永强张芳廖后元武琳苑何晴蔡明郴州市农业科学研究所湖南郴州423000

辣椒是湘南地区主要种植的蔬菜种类之一,市场需求量大,种植效益高。介绍了湘南地区大棚辣椒秋延后栽培技术要求、秋延后辣椒再生栽培技术要点及全程病虫害防控关键措施,以供参考。

关键词：大棚辣椒秋延后再生栽培湘南地区

基于BWM-EWM的铁路综合客运枢纽站城融合发展水平评价研究

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铁道经济研究 2024年第3期 49-56页

作者：赵悦陶思宇邓雨平杨寒冰白阳罗雪西南交通大学交通运输与物流学院四川成都611756 西南交通大学综合交通运输智能化国家地方联合工程实验室四川成都611756 西南交通大学综合交通大数据应用技术国家工程实验室四川成都611756 中铁二院重庆勘察设计研究院有限责任公司重庆401120

铁路综合客运枢纽站城融合发展已经成为城市高质量发展的重要催化剂,亟需科学决策铁路综合客运枢纽站城融合的开发规模和力度。通过铁路综合客运枢纽站城融合评价指标体系评价原则构建,从交通发展水平、土地利用水平和站城衔接水平3个... 详细信息

铁路综合客运枢纽站城融合发展已经成为城市高质量发展的重要催化剂,亟需科学决策铁路综合客运枢纽站城融合的开发规模和力度。通过铁路综合客运枢纽站城融合评价指标体系评价原则构建,从交通发展水平、土地利用水平和站城衔接水平3个准则层,提出铁路综合客运枢纽站城融合评价指标体系,建立基于BWM-EWM的铁路综合客运枢纽站城融合发展水平评价模型。以北京南站、上海虹桥站、南京南站、深圳北站和重庆沙坪坝站5个典型铁路综合客运枢纽进行实证分析,研究结果表明:南京南站具有较好的站城融合水平,还需要进一步强化枢纽统筹协调、提高站城衔接水平,集中开发枢纽用地、提高土地开发效益。

关键词：铁路综合客运枢纽 BWM EWM 站城融合指标体系客观赋权法主观赋权法发展水平评价模型

成品退火升温速率对中高压电子铝箔性能的影响

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铝加工 2024年第1期 58-62页

作者：邓玉萍覃雪广西广投正润新材料科技有限公司贺州542800

采用不同的退火升温速率对铝电解电容器用中高压电子铝箔进行成品退火,并利用EBSD技术、蚀坑法分析其晶粒尺寸、立方织构含量及分布规律。结果表明,电子铝箔的平均晶粒尺寸随着升温速率的增大呈减小趋势,当升温速率为10℃/min时,平均晶... 详细信息

采用不同的退火升温速率对铝电解电容器用中高压电子铝箔进行成品退火,并利用EBSD技术、蚀坑法分析其晶粒尺寸、立方织构含量及分布规律。结果表明,电子铝箔的平均晶粒尺寸随着升温速率的增大呈减小趋势,当升温速率为10℃/min时,平均晶粒尺寸最小;小角度晶界占比随退火升温速率的增加呈增大趋势;立方织构占有率随着升温速率的增大呈先升高后减小的趋势,在8℃/min时获得的立方织构占有率最高,且腐蚀箔上由立方织构腐蚀得到的正方形蚀坑数量多且分布均匀。研究结果为实际生产工艺的设计和改善产品性能、质量提供理论指导。

关键词：中高压电子铝箔成品退火升温速率立方织构晶粒尺寸

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弹性蛋白对前交叉韧带力学响应影响的弹性蛋白酶定量分析

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中国组织工程研究 2024年第22期28卷 3451-3456页

作者：张闻天邓羽平刘晓云李彩娟王勉梁泽宇熊亮黄刚陈广新李子涛黄文华福建医科大学基础医学院福建省福州市350122 南方医科大学基础医学院人体解剖学国家重点学科广东省医学生物力学重点实验室广东省医学3D打印应用转化工程技术研究中心广东省广州市510515 南方医科大学中西医结合医院骨伤科广东省广州市510315 生物医学工程研究所深圳湾实验室广东省深圳市518132 牡丹江医学院附属红旗医院超声科黑龙江省牡丹江市157011 深圳市坪山区人民医院(南方医科大学坪山总医院) 广东省深圳市518118 牡丹江医学院医学影像学院黑龙江省牡丹江市157011 牡丹江市北药资源开发与应用协同创新中心黑龙江省牡丹江市157011 牡丹江医学院附属红旗医院黑龙江省牡丹江市157011 南方医科大学第三附属医院广东省医学3D打印应用转化创新平台广东省广州市510000

背景:前交叉韧带在复杂的生理加载环境下具有其独特的非线性力学特性。弹性蛋白作为前交叉韧带力学特性的重要贡献者,其在轴向拉伸下对前交叉韧带力学响应特性尚不明确。目的:定量分析弹性蛋白对前交叉韧带拉伸力学响应的影响。方法:制... 详细信息

背景:前交叉韧带在复杂的生理加载环境下具有其独特的非线性力学特性。弹性蛋白作为前交叉韧带力学特性的重要贡献者,其在轴向拉伸下对前交叉韧带力学响应特性尚不明确。目的:定量分析弹性蛋白对前交叉韧带拉伸力学响应的影响。方法:制备弹性蛋白酶溶液及对照缓冲液。将猪前交叉韧带样品制备成小规格样品,随机分别浸泡于0,0.1,1.0,2.0,5.0,10.0 U/mL的弹性蛋白酶溶液中6 h,另取相同规格小样品分别浸泡于2 U/mL的弹性蛋白酶溶液中0,1,3,6,9,12 h,以确定适合弹性蛋白靶向酶的浸泡条件并进行消化效果验证,使用组织学染色比较酶处理对组织结构与成分的影响。将韧带样品随机分为酶处理组和PBS组,分别浸泡在2 U/mL弹性蛋白酶溶液和PBS中6 h,于浸泡前、后均进行力学拉伸测试。结果与结论:①生化结果表明,2 U/mL弹性蛋白酶溶液浸泡6 h能将弹性蛋白含量降低31.1%,且没有显著影响组织内其他力学相关成分;②组织学结果显示,弹性蛋白酶可渗透入组织内部,浸泡后的组织松散程度增加;③在浸泡前、后的力学结果中,PBS组的多项力学性能均显著下降,酶处理组仅有低张弹性模量显著升高及初长度显著增加;④组间比较结果显示,浸泡前PBS组与酶处理组差异均无显著意义,而浸泡后的酶处理组的低张弹性模量、初始斜率、饱和斜率和初长度比PBS组显著增加;⑤以上结果表明,弹性蛋白降解显著影响了前交叉韧带的生物力学属性,进一步补充了对前交叉韧带结构-功能关系之间的理解。

关键词：前交叉韧带生物力学弹性蛋白 EVG染色准静态拉伸黏弹性

Relationship Between Net Photosynthetic Rate of Cassava SC205 and Its Physio-ecological Factors

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Agricultural Science & Technology 2014年第2期15卷 243-247页

作者： Yong SONG Xuan LIN Jinhui YANG yuping deng Xingyao XIONG Hunan Key Laboratory for Germplasm Innovation and Resource Utilization of Crop Hunan Agricultural University College of Horticulture and Landscape Hunan Agricultural University Hunan Provincial Engeneering Research Center for Potato

[Objective]The aim was to measure photosynthetic characters of SC 205, a cassava cultivar, and explore the relationships of the net photosynthetic rate （Pn） with physiological and ecological factors. [Method] The diurnal variations of photosyn-thesis in leaves of SC205 were studied by LICOR-6400 portable photosynthesis system, and the relationships of the net photosynthetic rate （Pn） with physiological and ecological factors were studied by simple correlation analysis and path analysis. [Result] The curve of diurnal variation of Pn showed single peak at 10：00 am at 24.07 μ mol CO2 m2/s, without showing midday depression; the diurnal changes of stomatal conductance （Gs）, transpiration rate （Tr）, leaf temperature （Tl）, air tempera-ture （Ta） and photosynthetic active radiation （PAR） al showed single peak curves, and there were positive relationships of Pn with Gs, Tr, Tl, Ta and PAR. The diur-nal variations of intercellular CO2 concentration （Ci）, atmospheric CO2 concentration （Ca）, relative humidity （RH） showed in a U-shape curve. There were highly signifi-cant positive correlation of Pn with Gs and PAR; the diurnal variation of Pn had highly significant negative correlations with Ci and Ca. The direct impact of physio-logical factors on Pn was as fol ows： Ci＆gt;Gs＆gt;Tl＆gt;Tr, and the direct impact of ecologi-cal factors was RH＆gt;PAR＆gt;Ca＆gt;Ta. [Conclusion] The research showed that Ci, Gs and Tr play very important roles in the changes of Pn among the physiological fac-tors, and PAR and Ca affect the changes of Pn among the ecological factors.

关键词： SC205 Net photosynthetic rate Diurnal variation Physiological factors Ecological factors

A wireless, implantable optoelectrochemical probe for optogenetic stimulation and dopamine detection

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Microsystems & Nanoengineering 2020年第1期6卷 590-601页

作者： Changbo Liu Yu Zhao Xue Cai Yang Xie Taoyi Wang Dali Cheng Lizhu Li Rongfeng Li yuping deng He Ding Guoqing Lv Guanlei Zhao Lei Liu Guisheng Zou Meixin Feng Qian Sun Lan Yin Xing Sheng School of Materials Science and Engineering and Hangzhou Innovation Institute Beihang UniversityBeijing 100191China Department of Electronic Engineering Beijing National Research Center for Information Science and Technology and IDG/McGovern Institute for Brain ResearchTsinghua UniversityBeijing 100084China Department of Physics Tsinghua UniversityBeijing 100084China Beijing Institute of Collaborative Innovation Beijing 100094China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Beijing Engineering Research Center of Mixed Reality and Advanced Display School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China Department of Mechanical Engineering Tsinghua UniversityBeijing 100084China Key Laboratory of Nano-devices and Applications Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of Sciences(CAS)Suzhou 215123China

Physical and chemical technologies have been continuously progressing advances in neuroscience *** development of research tools for closed-loop control and monitoring neural activities in behaving animals is highly *** this paper,we introduce a wirelessly operated,miniaturized microprobe system for optical interrogation and neurochemical sensing in the deep *** epitaxial liftoff and transfer printing,microscale light-emitting diodes(micro-LEDs)as light sources and poly(3,4-ethylenedioxythiophene)polystyrene sulfonate(PEDOT:PSS)-coated diamond films as electrochemical sensors are vertically assembled to form implantable optoelectrochemical probes for real-time optogenetic stimulation and dopamine detection capabilities.A customized,lightweight circuit module is employed for untethered,remote signal control,and data *** the probe is injected into the ventral tegmental area(VTA)of freely behaving mice,in vivo experiments clearly demonstrate the utilities of the multifunctional optoelectrochemical microprobe system for optogenetic interference of place preferences and detection of dopamine *** presented options for material and device integrations provide a practical route to simultaneous optical control and electrochemical sensing of complex nervous systems.

关键词： electrochemical microprobe printing

Effects of Powder Ridge Cultivation on Growth and Yield of Hunan Cassava

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Agricultural Science & Technology 2014年第3期15卷 359-362,374页

[Objective] The aim was to explore a suitable cultivation approach for cassava in Hunan province. [Method] With SC9(Southern China 9) as test materials, the test included four treatment methods, as follows: control group by traditional cultivation with crops uncovered(CK), treatment 1 by traditional cultivation with mulch coverage, treatment 2 by powder ridge cultivation with crops uncovered, and treatment 3 by powder ridge cultivation with mulch coverage. Water and fertilizer managements were kept the same. [Result] Compared with traditional cultivation(CK), the treatment by powder ridge cultivation with mulch coverage performed better. Specifically, yield per unit area reached 44 790 kg/hm2, increasing by 86.38%(20 760 kg/hm2) than that of control; starch content grew by 17.24%. The cultivation method considerably improved cassava yield and quality. [Conclusion] Powder ridge cultivation with mulch coverage is a cultivation approach suitable for cassava in Hunan province.

关键词： Powder ridge Mulch coverage Cassava Yield

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外商直接投资、产业集聚与策略性减排

数量经济技术经济研究 2016年第9期33卷 112-128页

作者：许和连邓玉萍湖南大学经济与贸易学院

本文将反映行业相似性的技术距离矩阵及经济距离矩阵引入空间杜宾模型,实证检验了外商直接投资与产业集聚互动对环境污染的影响。研究结果表明我国行业污染排放存在一定的策略性竞争,其中经济属性相似的行业间存在减排竞争效应,技术结... 详细信息

本文将反映行业相似性的技术距离矩阵及经济距离矩阵引入空间杜宾模型,实证检验了外商直接投资与产业集聚互动对环境污染的影响。研究结果表明我国行业污染排放存在一定的策略性竞争,其中经济属性相似的行业间存在减排竞争效应,技术结构相似的行业间却体现出一定程度的排污攀比效应。在控制了FDI与产业集聚的交互作用后,FDI引入明显降低了行业污染排放强度。产业集聚进一步强化了FDI的减排溢出效应,并带动了邻近行业间的策略性减排竞争。

关键词：外商直接投资产业集聚策略性减排溢出效应