检索结果-南通市图书馆

Flow Boiling Heat Transfer Characteristics and Delayed Dry-Out Ability of Non-Azeotropic Mixtures R245fa/R134a in Microchannels

引用

Journal of Thermal Science 2024年第3期33卷 1174-1188页

作者： LU Yongjie LING Yongjun ZHUANG Yuan LI Chenyang ouyang hongsheng HAN Xiaohong Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province Institute of Refrigeration and CryogenicsZhejiang UniversityHangzhou310007China Zhejiang Zhongguang Electrical Co. Ltd.Lishui323000China State Key Lab for Fluorine Greenhouse Gases Replacement and Control Treatment Zhejiang Research Institute of Chemical IndustryHangzhou310014China

Microchannel flow boiling heat transfer has the advantages of strong heat dissipation capacity,good temperature uniformity,and compact *** is an excellent way to thermally manage electronic devices,but when the heat flux exceeds CHF(Critical Heat Flux),the heat transfer performance deteriorates as the working fluid dries ***-azeotropic mixtures have the potential to effectively delay or avoid dry-out during the boiling process due to their temperature slide characteristics which causes the mass transfer *** understand the influence of non-azeotropic mixtures on microchannel flow boiling,using the phase-change microchannel heat sink as the research object,the experiments on the flow boiling heat transfer performance of R245fa/R134a mixtures under different working conditions were carried out,and the characteristics of flow boiling heat transfer were obtained under the different working conditions,and comparison was developed with those of pure substance *** results demonstrated that a small amount of low-boiling-point components in the high-boiling-point working fluid inhibited boiling heat transfer to some extent,and lowered the average heat transfer coefficient under the non-dryout condition slightly lower than that of the pure substance;however,it also effectively delayed the onset of local dry-out and prevented significant deterioration in thermal transfer performance under the lower mass flow rate and higher heat flux,which could enhance the heat sink's stability.

关键词： microchannel flow boiling non-azeotropic mixture heat transfer characteristics dry-out

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A New Excess Free Energy Mixing Rule for Representing Vapor-Liquid Equilibria of Mixed Refrigerants

引用

Journal of Thermal Science 2024年第3期33卷 1161-1173页

作者： YE Gongran FANG Yibo YAN Yuhao LIU Ying ouyang hongsheng GUO Zhikai HAN Xiaohong Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province Institute of Refrigeration and CryogenicsZhejiang UniversityHangzhou310027China State Key Lab for Fluorine Greenhouse Gases Replacement and Control Treatment Zhejiang Research Institute of Chemical IndustryHangzhou310014China Zhejiang Key Laboratory of Clean Energy and Carbon Neutrality Zhejiang UniversityHangzhou310027China

A suitable mixing rule is important for vapor liquid equilibrium(VLE)investigations for mixed *** this work,a new excess free energy mixing rule(MRv)was proposed at zero pressure based on the linear relationship between dimensionless parameter 1/(u-1)and *** mixing rule was explicit adopted variable liquid molar *** applicable temperature range of MRv could be extended by means of an empirical method to estimate the liquid molar volume for components at high *** mixing rules modified Huron-Vidal mixing rule(MHV1),Wong-Sandler mixing rule(WS),and MRv at two reference pressures were used to compare the VLE data in the calculation of 37 mixed *** demonstrated that MRv had a relatively similar accuracy to MHV1 and WS for component and pressure ***,the average excess Gibbs free energy using the MRv mixing rule for the 37 selected mixed refrigerants(0.0013)was much lower than those using the MHV1(0.0078)and WS(0.0809)mixing rules,which was very valuable for the design and optimization of thermodynamic systems using mixed refrigerants.

关键词： mixed refrigerant vapor liquid equilibrium(VLE) mixing rule reproducibility

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Large-Scale CRISPR Screen of LDLR Pathogenic Variants

引用

Research 2024年第2期2023卷 213-225页

作者： Mengjing Li Lerong Ma Yiwu Chen Jianing Li Yanbing Wang Wenni You Hongming Yuan Xiaochun Tang hongsheng ouyang Daxin Pang Key Lab for Zoonoses Research Ministry of EducationAnimal Genome Editing Technology Innovation CenterCollege of Animal SciencesJilin UniversityChangchunJilin Province 130062China The Institute of Translational Medicine Tianjin Union Medical Center of Nankai UniversityTianjin 300071China Chongqing ResearchInstitute Jilin UniversityChongqing 401123China Chongqing Jitang Biotechnology Research Institute Co.Ltd. ChongqingChina

Familial hypercholesterolemia(FH)is a frequently occurring genetic disorder that is linked to early-onset cardiovascular *** left untreated,patients with this condition can develop severe cardiovascular ***,many patients remain undiagnosed,and even when diagnosed,the treatment is often not *** mutations in the LDLR gene are the primary cause of FH,predicting whether novel variants are pathogenic is not a straightforward *** the functionality of LDLR variants is crucial in uncovering the genetic basis of *** study utilized CRISPR/Cas9 cytosine base editors in pooled screens to establish a novel approach for functionally assessing tens of thousands of LDLR variants on a large scale.A total of more than 100 single guide RNAs(sgRNAs)targeting LDLR pathogenic mutations were successfully screened with relatively high *** of these,5 sgRNAs were further subjected to functional verification studies,including 1 in the promoter,1 in the antisense RNA,1 in the exon,and 2 in the *** for the variant caused by the sgRNA located at intron 16,the functionalities of the other LDLR variants were all *** high similarity of LDLR intron sequences may lead to some false ***,these results confirm the reliability of the large-scale screening strategy for functional analysis of LDLR variants,and the screened candidate pathogenic mutations could be used as an auxiliary means of clinical gene detection to prevent FH-induced heart disease.

关键词： LDLR Screen straight

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于平板热管技术的电子器件热管理研究进展

引用

制冷学报 2024年第3期45卷 1-22,49页

作者：罗松严昱昊叶恭然朱剑杰欧阳洪生肖隆湟韩晓红浙江大学制冷与低温研究所、浙江省制冷与低温技术重点实验室杭州310027 含氟温室气体替代及控制处理国家重点实验室、浙江省化工研究院有限公司杭州310023

随着电子器件不断趋于小型化和高度集成化发展,电子器件功率过高引发的散热问题亟待解决。平板热管由于具有均温性好、散热效率高等优势已为许多大功率电子元器件的散热问题提供了有效的热管理解决方案。但面对如今越来越多元化的散热需... 详细信息

随着电子器件不断趋于小型化和高度集成化发展,电子器件功率过高引发的散热问题亟待解决。平板热管由于具有均温性好、散热效率高等优势已为许多大功率电子元器件的散热问题提供了有效的热管理解决方案。但面对如今越来越多元化的散热需求,开发适应新型电子设备散热需求的高效平板热管仍是当前研究的热点。基于此,在对平板热管工作原理及结构特点进行阐述的基础上,对平板热管的传热性能、影响传热性能的因素(毛细芯结构、腔体厚度、工质、充液率、倾角和热源)、强化平板热管传热性能的措施(不同润湿性表面和支撑柱结构等)及其在小型化电子设备、IGBT晶体管、LED和电池组等电子器件散热应用等方面进行了系统性综述,指出研究不同毛细芯结构与腔体厚度下平板热管内部流动传热特性、散热性能强化的机制和综合优化方法,以及如何在不同电子器件热管理需求下设计出空间适应性强而散热性能高效的平板热管等仍是当前平板热管有待进一步突破的关键技术,将为平板热管在电子器件散热领域的进一步深入研究与优化提供一定参考。

关键词：平板热管临界热流密度表面润湿性强化传热电子器件散热

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Comparison of Five Endogenous Reference Genes for Specific PCR Detection and Quantification of Rice

引用

Rice science 2019年第4期26卷 248-256,I0006,I0007页

作者： ZHANG Xiujie JIN Wujun XU Wentao LI Xiaying SHANG Ying LI Sha ouyang hongsheng College of Animal Sciences Jilin University Changchun 130062 China Development Center of Science and Technology Ministry of Agriculture and Rural Affairs Beijing 100176 China Biotechnology Research Institute Chinese Academy of Agricultural Sciences Beijing 100081China College of Food Science and Nutritional Engineering China Agricultural University Beijing 100083China

Endogenous reference genes (ERGs) provide vital information regarding genetically modified organisms (GMOs). The successful detection of ERGs can identity GMOs and the source of genes, verify stability and reliability of the detection system, and calculate the level of genetically modified (GM) ingredients in mixtures. The reported ERGs in rice include sucrose-phosphate synthase (SPS), phospholipase D (PLD), RBE4 and rice root-specific GOS9 genes. Based on the characteristics of ERGs, a new ERG gene, phosphoenolpyruvate carboxylase (PEPC), was selected, and further compared with the four existing genes. A total of 18 rice varieties and 29 non-rice crops were used to verify the interspecies specificity, intraspecies consistency, sensitivity, stability and reliability of these five ERGs using qualitative and quantitative PCR. Qualitative detection indicated that SPS and PEPC displayed sufficient specificity, and the detection sensitivity was 0.05% and 0.005%, respectively. Although the specificity of both RBE4 and GOS9 were adequate, the amplicons were small and easily confused with primer dimers. Non-specific amplification of the PLD gene was present in maize and potato. Real-time quantitative PCR detection indicated that PLD, SPS and PEPC displayed good specificity, with R2 of the standard curve greater than 0.98, while the amplification efficiency ranged between 90% and 110%. Both the detection sensitivities of PLD and PEPC were five copies and that of SPS was ten copies. RBE4 showed typical amplification in maize, beet and Arabidopsis, while GOS9 was found in maize, tobacco and oats. PEPC exhibited excellent detection sensitivity and species specificity, which made it a potentially useful application in GM-rice supervision and administration. Additionally, SPS and PLD are also suitable for GM-rice detection. This study effectively established a foundation for GMO detection, which not only provides vital technical support for GMO identification, but also is of grea

关键词： endogenous reference gene rice genetically modified crop phosphoenolpyruvate carboxylase gene sucrose-phosphate synthase gene phospholipase D gene starch branching enzyme 4 gene rice root-specific GOS9 gene

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Charge collection narrowing mechanism in electronic-grade-diamond photodetectors

引用

Opto-Electronic Advances 2024年第6期7卷 1-3页

作者： Xiaoping ouyang State Key Laboratory of Intense Pulsed Radiation Simulation and Effect and Radiation Detection Research Center Northwest Institute of Nuclear TechnologyXi’an 710024China

Recently,an extreme narrowband spectral response of only 8 nm in electronic-grade diamond-based photodetectors has been observed by Zheng Wei and his colleagues from Sun Yat-sen University for the first time.A charge collection narrowing mechanism assisted by free exciton radiative recombination is proposed,which well reveals the characteristic spectral response of diamond.

关键词： mechanism electronic extreme

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Recent progress in self-propelled particles

引用

Journal of Hydrodynamics 2024年第1期36卷 61-77页

作者： Zhen-yu ouyang Jian-zhong Lin Laboratory of Impact and Safety Engineering Ministry of EducationNingbo UniversityNingbo315201China Department of Mechanics State Key Laboratory of Fluid Power and Mechatronic SystemsZhejiang UniversityHangzhou310027China

Self-propelled particles are commonly found in a large number of planktonic organisms such as bacteria,fungi,and algae in nature,and researchers have taken a long interest in exploring their swimming mechanisms for more than a *** in the past 20 years,with the development of computational fluid dynamics and flow display technology,as well as the need for the design of synthetic self-propelled particles and micro-swimming devices,self-propelled particles have become the forefront and hotspot of current research in the field of fluid *** paper first introduces the swimming characteristics of common self-propelled particles,leading to a classic“squirmer”type self-propelled particle *** this basis,a systematic introduction and summary of the theoretical and numerical simulation research of“squirmer”will be ***,the main challenges and opportunities faced by the current research will be summarized.

关键词： Self-propelled particles multiphase flow hydrodynamic interaction

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

认知交互视域下网络知识的生产与传播

引用

中州学刊 2022年第1期 159-165页

作者：李城欧阳宏生西南财经大学人文学院成都611130 四川大学成都大学传媒研究院成都610104

移动互联网时代,网络知识生产的意义生成并不只存在于文本及表征系统中,也存在于非表征性的具身实践、特定情境、媒介惯习、情感、需求及动机等的交互耦合中。表征与非表征协调作用,构建了网络知识生产的完整意义。非表征文化为网络知... 详细信息

移动互联网时代,网络知识生产的意义生成并不只存在于文本及表征系统中,也存在于非表征性的具身实践、特定情境、媒介惯习、情感、需求及动机等的交互耦合中。表征与非表征协调作用,构建了网络知识生产的完整意义。非表征文化为网络知识创新提供了新的实践切入点。认知主体与环境、物质化媒介、知识平台等构成彼此关联的共同体。在离身与具身认知交互视域下,网络知识生产传播应从关系性体认入手,以实践中的认知主体为核心,通过知识生产观念转变、知识关系网络重塑和知识服务升级重构网络知识生产传播秩序。

关键词：认知交互表征非表征网络知识生产传播

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Change of probability density distributions of summer temperatures in different climate zones

引用

Frontiers of Earth Science 2024年第1期18卷 1-16页

作者： Xinqiu ouyang Weilin LIAO Ming LUO Guangdong Key Laboratory for Urbanization and Geo-simulation School of Geography and PlanningSun Yat-sen UniversityGuangzhou 510006China Institute of Environment Energy and SustainabilityThe Chinese University of Hong KongHong Kong 999077China

Extreme events have become increasingly frequent worldwide which are reflected in diverse changes in the shape of the temperature probability density ***,few studies have paid attention to the heterogeneity of temperature at the scale of climate ***,we use the ERA5-land data set to explore interdecadal summer temperature changes and the distribution across different climate zones from 1981 to *** the minimum(Tmin)and maximum(Tmax)temperature of 1982–1991 and 2010–2019,the results imply that Tmin and Tmax in summer maintained a notable upward trend over the past 40 years,especially *** effects of a simple shift toward a warmer climate contributed most to all climate zones,while the standard deviation,skewness and kurtosis had minor effects on extreme temperature except for *** analysis shows that the probability of extreme events in all climate zones is increasing in frequency and intensity,especially Tmin and Tmax in temperate climate *** diverse reasons for climate change can assist us with taking different measures to address extreme climate in distinct climate zones.

关键词： Climate change probability density function extreme events

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

多措并举稳步推进中国纪录片高质量发展

引用

电视研究 2022年第6期 16-19页

作者：刘倩欧阳宏生成都大学传媒研究院学术部成都大学中国-东盟艺术学院影视与动画学院四川大学

本文总结了近十年来中国纪录片发展的现状,分析了当前国产纪录片创作和产业发展的成功经验和存在的困境,从产业发展、人才培养、受众拓展、行业管理等方面提出一些建议,希望能为纪录片领域的相关政策制定者和广大从业人员提供参考。

关键词：中国纪录片精神文化需求高质量发展

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：