检索结果-南通市图书馆

A general alternate loading technique and its applications in the inverse designs of centrifugal and mixed-flow pump impellers

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2021年第4期64卷 898-918页

作者： wang chaoyue wang FuJun AN DongSen YAO ZhiFeng XIAO RuoFu LU Li HE ChengLian ZOU ZhiChao College of Water Resources and Civil Engineering China Agricultural UniversityBeijing 100083China Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System Beijing 100083China China Institute of Water Resources and Hydropower Research Beijing 100038China China Water Resources Beifang Investigation Design and Research Co.Ltd.Tianjin 300222China

For the inverse designs of centrifugal and mixed-flow pump impellers,clarifying the generation process of secondary flows and putting forward corresponding suppression measures is an important approach to improve the impeller *** this paper,to provide a better qualitative insight into the generation mechanism of secondary flows in the impeller,a simple kinematic equation is derived based on the ideal assumptions,which indicates that the potential rothalpy gradient(PRG)is the most important dynamic source that actively induces secondary vortical *** by the natural adverse PRG on the S1 and S2 stream surfaces,two typical secondary flows,H-S and P-S secondary flows,are clearly *** specially suppress these typical secondary flows,a general alternate loading technique(GALT)is proposed,aiming to adjust the real blade loadingδp to control the PRG *** the blade fore part,theδp on the hub streamline should be slowly increased to avoid breakneck growth of the potential rothalpy to reduce adverse streamwise PRG on the S2 *** the blade middle part,theδp should be moderately decreased to reduce adverse streamwise PRG on the S1 *** the blade aft part,the difference in theδp between the shroud and hub streamlines should be decreased faster to control the exit *** applying the GALT to the impeller designs of three typical pump types in hydraulic engineering,the organizational effect of the PRG on fundamental flow structures is *** GALT can effectively control the PRG distributions and suppress the secondary flows,thereby widening the pump’s high-efficiency zone,improving flow uniformity and suppressing pressure *** with the current Z-G method and the ALT,the GALT can meet the requirements of"de-experience"better,thereby enabling the designers to obtain good products explicitly and quickly.

关键词： alternate loading technique inverse design centrifugal pump mixed-flow pump impeller potential rothalpy gradient

Single-atom cobalt catalysts for chemoselective hydrogenation of nitroarenes to anilines

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2023年第12期34卷 183-188页

作者： Xiaochun Liu chaoyue wang Jiaolong Meng Xiaodong Yue Qingyun wang Jiatian Lu Junke wang Xicun wang Yingxiao Zong Xuefeng Jjiang Gansu Key Laboratory of Polymer Materials College of Chemistry and Chemical EngineeringNorthwest Normal UniversityLanzhou 730070China Key Laboratory of Hexi Corridor Resources Utilization of Gansu College of Chemistry and Chemical EngineeringHexi UniversityZhangye 734000China Shanghai Key Laboratory of Green Chemistry and Chemical Process Department of ChemistryEast China Normal UniversityShanghai 200062China School of Materials Design&Engineering Beijing Institute of Fashion TechnologyBeijing 100000China

Single-atomic catalysts(SACs)caught considerable attention due to their unique structural properties,complete exposed active site,and 100%atom utilization efficiency with remarkable catalytic *** single-atomic cobalt catalyst with Co-N_(4) active sites was synthesized by using nitrogen-doped graphene derived from ***-atomic cobalt was observed by aberration-corrected high-angle annular dark-field scanning transmission electron microscopy(HAADF-STEM)in Co@***,the density functional theory(DFT)calculation and the extended X-ray absorption fine structures(EXAFS)fitting results indicate that the coordination structure of Co-N is *** this work,the practical hydrogenation of nitroarenes to anilines enabled by Co@Nx-C-800 was established with excellent yields and selectivity,which proved its advantages and potential applications.

关键词： Cobalt catalyst Heterogeneous catalysis Nitro reduction Single-atom catalysts Chemoselective hydrogenation

Design of high-performance and sustainable Co-free Ni-rich cathodes for next-generation lithium-ion batteries

在线全文

学校读者我要写书评

暂无评论

SusMat 2024年第1期4卷 48-71页

作者： Hao Ge Zhiwen Shen Yanhong wang Zhijia Sun Xiaoman Cao chaoyue wang Xinyue Fan Jinsong Bai Rundong Li Tianhua Yang Gang Wu School of Energy and Environment Shenyang Aerospace UniversityShenyangP.R.China Shenyang Aircraft Airworthiness Certification Center of CAAC ShenyangP.R.China College of Chemistry and Materials Engineering Bohai UniversityJinzhouP.R.China Liaoning General Aviation Academy ShenyangP.R.China Department of Chemical and Biological Engineering University at BuffaloState University of New YorkBuffaloNew YorkUSA

Great attention has been given to high-performance and inexpensive lithiumion batteries(LIBs)in response to the ever-increasing demand for the explosive growth of electric vehicles(EVs).High-performance and low-cost Co-freeNi-rich layered cathodes are considered one of the most favorable candidates for nextgeneration LIBs because the current supply chain of EVs relies heavily on scarce and expensive ***,we review the recent research progress on Co-free Nirich layered cathodes,emphasizing on analyzing the necessity of replacing Co and the popular improvment *** current advancements in the design strategies of Co-free Ni-rich layered cathodes are summarized in *** considerable improvements achieved so far,the main technical challenges contributing to the deterioration of Co-free Ni-rich cathodes such as detrimental phase transitions,crack formation,and severe interfacial side reactions,are difficult to resolve by a single *** cooperation of multiple modification strategies is expected to accelerate the industrialization of Co-free Ni-rich layered cathodes,and the corresponding synergistic mechanisms urgently need to be *** effects will be aroused to explore high-performance Co-free Ni-rich layered cathodes to promote the sustainable development of LIBs.

关键词： Co-free cathodes electrochemical performance lithium-ion batteries modification strategies Ni-rich layered cathodes

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

离心泵瞬态模拟中滑移界面形状和位置研究

农业机械学报 2017年第1期48卷 81-88页

作者：王超越王福军中国农业大学水利与土木工程学院北京100083 北京市供水管网系统安全与节能工程技术研究中心北京100083

滑移网格法是分析离心泵瞬态流场的最主要方法,其中滑移界面形状和位置的选取方式对流场计算结果有直接影响,而目前对如何选取离心泵滑移界面并无统一的看法。以一台离心泵为研究对象,采用5种不同的滑移界面方案分别对水泵流场进行瞬态... 详细信息

滑移网格法是分析离心泵瞬态流场的最主要方法,其中滑移界面形状和位置的选取方式对流场计算结果有直接影响,而目前对如何选取离心泵滑移界面并无统一的看法。以一台离心泵为研究对象,采用5种不同的滑移界面方案分别对水泵流场进行瞬态模拟,对比不同工况下的外特性、基本流态和隔舌处压力脉动特性等。研究表明,方案I(紧贴叶轮的短一字形滑移界面)和方案Ⅴ(环绕叶轮的倒U字形滑移界面)的水泵效率平均计算误差均在1%左右,且两者在轴面流态和蜗壳进口的速度分布上均与实际情况吻合良好,而方案Ⅴ更能突出泵腔流体流速的梯度变化,且在隔舌处的压力脉动特性方面最符合已有研究结果。方案Ⅲ(紧贴叶轮的长一字形滑移界面)和方案Ⅳ(紧贴基圆的长一字形滑移界面)均将整个泵腔设为旋转域,水泵效率计算误差达5.2%和9.2%,且两者的轴面流态也明显有悖于已有研究结论。方案Ⅳ和方案Ⅱ(紧贴基圆的短一字形滑移界面)均将旋转域紧贴隔舌,导致隔舌对液流的切割作用被放大,表现为隔舌处的进口流速严重下降。综合分析表明,直接将泵腔设为旋转域和将滑移界面紧贴隔舌的做法均会使模拟结果有较大偏差,推荐将滑移界面取为环绕叶轮的倒U字形,该方式能在保证模拟精度的同时反映最真实的流动特性。

关键词：离心泵滑移网格法滑移界面瞬态分析

地方性应用型理工类高校中药学专业建设——以金华理工学院为例

在线全文

学校读者我要写书评

暂无评论

中国中医药现代远程教育 2025年第2期23卷 189-192页

作者：胡小勤王超越杨雨顺王潇孙婷婷沈芷琦洪伟玲施静怡赵海均陈敏金华高等研究院中医康复研究所浙江金华321013

随着地方中医药事业的快速发展,培养一批服务于地方经济,且能够从事中药种植、鉴定、炮制与加工、制剂及临床合理用药等工作的中药学实用型人才迫在眉睫。文章针对中药学专业建设存在的一些问题,结合金华理工学院筹建中药学专业的经验,... 详细信息

随着地方中医药事业的快速发展,培养一批服务于地方经济,且能够从事中药种植、鉴定、炮制与加工、制剂及临床合理用药等工作的中药学实用型人才迫在眉睫。文章针对中药学专业建设存在的一些问题,结合金华理工学院筹建中药学专业的经验,探讨了地方性应用型理工类高校中药学专业建设思路,提出了应坚持中医学特色、突出地方性特色、突出应用型特色、发挥理工类学科对中药学专业的辐射和带动作用四个建议,以期促进地方性应用型理工类本科院校中药学专业的高水平建设。

关键词：地方应用型高校中药学专业建设人才培养

Construction of transgenic Toxoplasma gondii expressing pore-forming toxin listeriolysin O(LLO)

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

Construction of transgenic Toxoplasma gondii expressing pore...

The role of transcription factor TgAP2IX-8 in oxidative protein folding in the endoplasmic reticulum of Toxoplasma gondii

2021中国畜牧兽医学会兽医寄生虫学分会第二届青年科学家学术论坛

作者： Ying Yu chaoyue wang Xianyong Liu Xun Suo National Animal Protozoa Laboratory College of Veterinary Medicine China Agricultural University

For the design of recombinant vector vaccines,the strategy for the expression and export of heterologous antigens is very *** develop vehicle vaccines using genetically modified Eimeria species,we aim to construct a transgenic Eimeria expressing LLO,pore-forming toxin listeriolysin O derived from Listeria monocytogenes,which will enhance the antibody responses to other pathogenic antigens *** tried to express(LLO) in Toxoplasma gondii,a model protozoa of apicomplexan parasites to facilitate this *** designed a plasmid in which LLO is fused with the signal peptide sequence from *** GRA8 protein(GRA8 ss) and C-terminal tagging with 3×*** plasmid was co-transfected with a CRISPR/Cas9 plasmid for the integration into the UPRT *** explore whether different LLO nucleotide sequences could express in *** RH *** used three forms of LLO sequence,i.e.,full-length(LLO),signal sequence truncated(tLLO),and sequence optimized according to the codon usage of Eimeria acervulina(LLO(O)).We detected the expression and location of LLOs by Western Blot analysis and Indirect immunofluorescent *** successfully constructed the 3 plasmids and transfected them individually into *** *** obtained LLO-and tLLO-expressed transgenic *** and observed the expression in the *** conclusion,LLO original sequence but not optimized sequence could express in transgenic *** work encourages the exploration of LLO expression in Eimeria acervulina.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

The role of transcription factor TgAP2IX-8 in oxidative prot...

基于虚拟补偿力的环形流道式离心泵能量特性高效预测方法研究

2021中国畜牧兽医学会兽医寄生虫学分会第二届青年科学家学术论坛

作者： chaoyue wang Xianyong Liu Hongjuan Peng Xun Suo

Protein disulfide isomerase(PDI),which contains thioredoxin(TRX) domains,is a key enzyme responsible for oxidative protein folding(the formation,reduction,and isomerization of disulfide bonds in new synthesized proteins) in the endoplasmic reticulum(ER).Currently,the underlying mechanism in regulating the oxidative protein folding pathway is still confusing in Toxoplasma *** this study,we evaluated the effect of the transcription factor TgAP2 IX-8 on the oxidative protein folding in *** utilized the auxin-inducible degron(AID) system to investigate the function of TgAP2 IX-8 in *** RNA-Seq and ChIP-Seq data to characterize the DNA binding motif and direct gene targets of TgAP2 ***,we generated an epitope-tagged TgPDI strain with C-terminal 6 Ty in AP2 IX-8-AID-3 HA parasites and determined the expression of TgPDI by treating AP2 IX-8-AID-3 HA parasites with3-indoleacetic acid(IAA).To investigate the role of different domains of TgAP2 IX-8,we ectopically expressed a second copy of TgAP2 IX-8,with a wild-type and ACDC or AP2 domain-depleted versions,respectively,tagged with 6 Ty at its C terminus driven by the endogenous promoter of TgAP2 IX-8 into the UPRT loci in the regulatable TgAP2 IX-8-AID-3 HA ***2 IX-8 is a nuclear protein that primarily expresses during the G1 and G1/S phases in cell division of *** knockout of TgAP2 IX-8 led to a reduced intracellular proliferation rate and a blocked in plaque formation on HFF *** analysis of RNA-Seq and ChIP-Seq data demonstrated that TgAP2 IX-8 binds to the promoter of TgPDI and in turn regulates the expression of ***,parasites depleted of TgAP2 IX-8 by IAA treatment showed a significant reduction in the expression of *** complementation revealed cooperation of two AP2 domains involved in maintaining the function of TgAP2 IX-8 for parasites *** study together suggests that TgAP2 IX-8 is crucial in reg

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

工程热物理学报 2024年第11期45卷 3338-3347页

作者：王昊肖若富王福军王超越中国农业大学水利与土木工程学院北京100083 北京市供水管网系统安全与节能工程技术研究中心北京100083

环形流道式离心泵能量特性预测是其水力设计及优化过程中不可或缺的环节,目前最常见的计算模式是采用RANS模型在同一套网格下开展不同流量工况下的稳态计算。工程实践表明,这种常规计算模式预测到的能量特性往往与实验间存在较大的固有... 详细信息

环形流道式离心泵能量特性预测是其水力设计及优化过程中不可或缺的环节,目前最常见的计算模式是采用RANS模型在同一套网格下开展不同流量工况下的稳态计算。工程实践表明,这种常规计算模式预测到的能量特性往往与实验间存在较大的固有偏差,特别表现为扬程和轴功率存在显著的正偏差,严重影响设计者对水力性能的预判。针对这一问题,本研究首先结合实际案例开展了溯源分析,发现这种常规计算模式存在高估螺旋度诱导的能量逆传效应、低估兰姆矢量诱导的非线性作用的问题,从而导致湍流耗散的预测不足,进而产生了高估叶片载荷、低估水力损失的宏观表现。为此,本研究提出了一种在动量方程中引入与螺旋度相关的虚拟补偿力以提高预测精度的矫正方法,该方法能抑制高雷诺数下旋转湍流中的能量反级串输运、补偿被低估的逆剪切力诱导的流阻耗散,从而达到适当增大流阻的效果。实际应用表明,该方法能有效消除常规计算模式下环形流道式离心泵扬程和轴功率的固有预测偏差,从而为快速而准确地把握产品质量、提高水力设计效率提供技术支撑。

关键词：环形流道式离心泵水力设计能量特性固有预测偏差虚拟补偿力

Exploring the regulatory role of Toxoplasma gondii ApiAP2 transcription factor in sexual development

在线全文

学校读者我要写书评

暂无评论

Exploring the regulatory role of Toxoplasma gondii ApiAP2 tr...