检索结果-南通市图书馆

Novel polyimide binder for achieving high-rate capability and long-term cycling stability of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) cathode via constructing polar and micro-branched crosslinking network structure

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第1期76卷 19-31,I0002页

作者： yueming xu Yali Wang Nanxi Dong Chuanzhi Pu Bingxue Liu Guofeng Tian Shengli Qi Dezhen Wu State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China ENFI R&D Institute China ENFI EngineeringCorporationBeijing 100038China China Automotive Battery Research Institute Co. Ltd.Beijing 101407China

LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)material,as the promising cathode candidate for next-generation highenergy lithium-ion batteries,has gained considerable attention for extremely high theoretical capacity and low cost.Nevertheless,the intrinsic drawbacks of NCM811 such as unstable structure and inevitable interface side reaction result in severe capacity decay and thermal runaway.Herein,a novel polyimide(denoted as PI-Om DT)constructed with the highly polar and micro-branched crosslinking network is reported as a binder material for NCM811 cathode.The micro-branched crosslinking network is achieved by using 1,3,5-Tris(4-aminophenoxy)benzene(TAPOB)as a crosslinker via condensation reaction,which endows excellent mechanical properties and large free volume.Meanwhile,the massive polar carboxyl(-COOH)groups provide strong adhesion sites to active NCM811 particles.These functions of PIOm DT binder collaboratively benefit to forming the mechanically robust and homogeneous coating layer with rapid Li+diffusion on the surface of NCM811,significantly stabilizing the cathode structure,suppressing the detrimental interface side reaction and guaranteeing the shorter ion-diffusion and electron-transfer paths,consequently enhancing electrochemical performance.As compared to the NCM811 with PVDF binder,the NCM811 using PI-Om DT binder delivers a superior high-rate capacity(121.07 vs.145.38 m Ah g^(-1))at 5 C rate and maintains a higher capacity retention(80.38%vs.91.6%)after100 cycles at 2.5–4.3 V.Particularly,at the high-voltage conditions up to 4.5 and 4.7 V,the NCM811 with PI-Om DT binder still maintains the remarkable capacity retention of 88.86%and 72.5%after 100 cycles,respectively,paving the way for addressing the high-voltage operating stability of the NCM811 cathode.Moreover,the full-charged NCM811 cathode with PI-Om DT binder exhibits a significantly enhanced thermal stability,improving the safety performance of batteries.This work opens a new avenue for developing high-energy NCM811 based lithium-ion batteries w

关键词： Polyimide Binder Micro-branched crosslinking network NCM811 cathode Lithium-ion battery

Structural insights into the activation initiation of full-length mGlu1

在线全文

学校读者我要写书评

暂无评论

Protein & Cell 2021年第8期12卷 661-666页

作者： Jinyi Zhang Lu Qu Lijie Wu Xiaomeng Tang Feng Luo Weixiu xu yueming xu Zhi-Jie Liu Tian Hua iHuman Institute ShanghaiTech UniversityShanghai 201210China School of Life Science and Technology Shanghailech UniversityShanghai 201210China University of Chinese Academy of Sciences Beijing 100049China CAS Center for Excellence in Molecular Cell Science Shanghai Institute of Biochemistry and Cell BiologyChinese Academy of SciencesShanghai 200031China

Dear Editor,Glutamate is the main excitatory neurotransmitter in the human brain,and it exerts diverse responses through ionotropic glutamate receptors(iGluRs)and metabotropic glutamate receptors(mGluRs)(Nakanishi and Masu,1994).mGluRs are members of the C family of GPCRs,and are divided into three groups based on G protein coupling,sequence homology,and ligand selectivity(Stansley and Conn,2019).mGlu1 and mGlu5 belong to group I and predominantly couple to Gq/11.

关键词： insight activation diverse

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

基于不同原料的食品3D打印技术研究进展

商丘师范学院学报 2024年第3期40卷 50-55页

作者：李鑫许月明张爽苏超葛雯徐迪芜湖职业技术学院芜湖市生命健康工程技术研究中心安徽芜湖241000

食品3D打印是一种新兴的数字化生产技术,可满足不同人群对食品外观的个性化定制及饮食健康等方面的需求.随着3D打印技术的不断发展,其在食品领域的研究与应用不断扩大.基于此,本文介绍了食品3D打印技术的工作原理、打印原料特性以及打... 详细信息

食品3D打印是一种新兴的数字化生产技术,可满足不同人群对食品外观的个性化定制及饮食健康等方面的需求.随着3D打印技术的不断发展,其在食品领域的研究与应用不断扩大.基于此,本文介绍了食品3D打印技术的工作原理、打印原料特性以及打印参数;重点综述了3D打印在谷物、肉类、果蔬等传统食品中的应用,展望了食品3D打印技术未来的发展与挑战,以期为食品3D打印技术在食品加工领域中的应用提供理论参考.

关键词： 3D打印果蔬谷物肉类适印性

Research on the Problems in the Collecting Land

在线全文

学校读者我要写书评

暂无评论

Chinese Business Review 2006年第3期5卷 78-81页

作者： Jianguo Wang yueming xu Jinhui Wang Agricultural University of Hebei Hehei Polytechnic University

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

新时代高职院校学生党员教育管理工作研究

九江职业技术学院学报 2024年第1期 65-68页

作者：徐月明柯虹童竟九江职业技术学院江西九江332007

当前高职院校学生党员教育管理工作中存在着重发展轻教育、学生党员入党动机复杂化、教育方式和活动载体缺乏吸引力、教育管理的相关制度不够健全、基层党组织力量薄弱等方面的问题。高职院校应创新学生党员教育管理机制,严格学生党员... 详细信息

当前高职院校学生党员教育管理工作中存在着重发展轻教育、学生党员入党动机复杂化、教育方式和活动载体缺乏吸引力、教育管理的相关制度不够健全、基层党组织力量薄弱等方面的问题。高职院校应创新学生党员教育管理机制,严格学生党员发展机制,创新学生党员教育机制,建立学生党员评价监督机制,完善学生党务干部能力提升机制。

关键词：高职院校学生党员教育管理

工匠精神培育视角下的高职课程思政教学改革研究——以《食品微生物检验技术》课程为例

在线全文

学校读者我要写书评

暂无评论

现代食品 2024年第4期30卷 87-89,210页

作者：李鑫许月明张爽张强葛雯芜湖职业技术学院安徽芜湖241003

思政教育和高等教育专业课程协同育人,是当今教学改革的重要发展目标。因此,本研究基于食品微生物检验技术课程,在工匠精神培育视角下,探索在高职专业课程中融入思政元素的路径,旨在提升学生综合素养,为国家培养工匠之才。

关键词：食品微生物检验技术思政教育工匠精神 “互联网+”

维普期刊数据库博看期刊

Identification of natural products as novel ligands for the human 5-HT2C receptor

在线全文

学校读者我要写书评

暂无评论

Biophysics Reports 2018年第1期4卷 50-61页

作者： Yao Peng Simeng Zhao Yiran Wu Haijie Cao yueming xu Xiaoyan Liu Wenqing Shui Jianjun Cheng Suwen Zhao Ling Shen Jun Ma Ronald J.Quinn Raymond C.Stevens Guisheng Zhong Zhi-Jie Liu National Laboratory of Biomacromolecules Institute of BiophysicsChinese Academy of Sciences Institute of Molecular and Clinical Medicine Kunming Medical University iHuman Institute Shanghai Tech University University of Chinese Academy of Sciences School of Life Science and Technology Shanghai Tech University College of Pharmacy Nankai University High-throughput Molecular Drug Discovery Center Tianjin Joint Academy of Biotechnology and Medicine Eskitis Institute for Drug Discovery Griffith University

G protein-coupled receptors(GPCRs) constitute the largest human protein family with over 800 members,which are implicated in many important medical conditions. Serotonin receptors belong to the aminergic GPCR subfamily and play important roles in physiological and psychological activities. Structural biology studies have revealed the structures of many GPCRs in atomic details and provide the basis for the identification and investigation of the potential ligands, which interact with and modulate the receptors.Here, an integrative approach combining a focused target-specific natural compound library, a thermalshift-based screening method, affinity mass spectrometry, molecular docking, and in vitro as well as in vivo functional assay, was applied to identify(–)-crebanine and several other aporphine alkaloids as initial hits for a human serotonin receptor subtype, the 5-HT2Creceptor. Further studies illuminated key features of their binding affinity, downstream signaling and tissue reaction, providing a molecular explanation for the interaction between(–)-crebanine and human 5-HT2Creceptor.

关键词： GPCR 5-HT 2C receptor Natural product Alkaloids

Channel-aware multi-user uplink transmission scheme for SIMO-OFDM systems

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science in China(Series F) 2009年第9期52卷 1678-1687页

作者： PAN ChengKang CAI yueming xu YouYun Institute of Communications Engineering PLA University of Science and Technology Nanjing 210007 China

The problem of medium access control （MAC） in wireless single-input multiple-output-orthogonal frequency division multiplexing （SIMO-OFDM） systems is addressed. Traditional random access protocols have low overheads and inferior performance. Centralized methods have superior performance and high overheads. To achieve the tradeoff between overhead and performance, we propose a channelaware uplink transmission （CaUT） scheme for SIMO-OFDM systems. In CaUT, users transmit requestto-send （RTS） at some subcarriers whose channel gains are above a predetermined threshold. Using the channel state information provided by RTS, access point performs user selection with receive beamforming to decide which users can access and then broadcasts the selection results via clear-to-send （CTS） to users. We present a distributed power control scheme by using a simple fixed modulation mode. We optimize the modulation order and channel gain thresholds to maximize the separable packets subject to the bit-error-rate （BER） and temporal fairness requirements and the individual average transmit power constraints. The performance of CaUT scheme is analyzed analytically and evaluated by simulations. Simulation results show that CaUT can achieve more significant throughput performance than traditional random access protocols.

关键词： SIMO-OFDM medium access control signal processing receive beamforming

Cooperative multiple access channels: Achievable rates and optimal resource allocation

在线全文

学校读者我要写书评

暂无评论

Science in China(Series F) 2009年第8期52卷 1428-1438页

作者： PAN ChengKang CAI yueming xu YouYun Institute of Communications Engineering PLA University of Science and Technology Nanjing 210007 China

We investigate the multiple access channels （MAC） where sources can cooperate via half-duplex relaying and refer to it as cooperative MAC channels （CMAC）. Assuming perfect channel state information （CSI） at the transmitters and the receivers, we determine the bounds on the achievable rate region of a Gaussian CMAC channel and an inner bound on the outage capacity region of a fading CMAC channel. Based on superposition modulation, a half-duplex cooperative relay scheme with optimal resource allocation is proposed to achieve the bounds of capacity region. Analytical results and simulation results show that the achievable rate region of a Gaussian CMAC channel is larger than that of a Gaussian MAC channel with direct transmission （DT） schemes. But they have the same achievable sum rate. Moreover, the proposed scheme can provide higher outage capacity region than DT schemes in a fading MAC channel due to the fact that sources can share the resources with each other to reduce outages.

关键词： multiple access channel cooperative communication rate region resource allocation