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Chinese Journal of Polymer Science 2002年第4期20卷 353-360页

作者： cai-yuan Pan Lei Tao Ye Liu Department of Polymer Science and Engineering University of Science and Technology of China, Hefei 230026 China Department of Polymer Science and Engineering University of Science and Technology of China Hefei 230026

A novel tetrafunctional initiator, C [CH_2O (CH_2)_3 OOCCH(Br)CH_3]_4 (1), was synthesized through the reaction oftetraol with α-bromopropionyl chloride, and then was used as initiator of atom transfer radical polymerization (ATRP) in thepreparation of 4-armed polystyrene (PSt) with narrow polydispersity. The structure, molecular weight and molecular weightdistribution (MWD) of each arm were studied by ~1H-NMR and GPC data of hydrolyzed products of the 4-armed PSt. TheATRP of St using 1/CuBr/bpy as initiator system is of 'living' character based on the following evidence: narrow MWD,constant concentration of chain radical during the polymerization, control of molecular weight by the molar ratio of monomerconsumed to 1. The 4-armed poly(St-b-p-nitrophenyl methacrylate) [poly(St-b-NPMA)] was prepared by the ATRP ofNPMA using 4-armed PSt with terminal bromine as the initiator, and characterized by FT-IR, ~1H-NMR spectra and GPCcurves. The micelles with PSt as core, and PNPMA as shell were formed by dropping DMSO into a solution of 4-armedpoly(St-b-NPMA) in DMF, as proved by laser light scatter (LLS) method.

关键词： Tetrafunctional initiator Atom transfer radical polymerization 4-Armed polystyrene 4-Armed poly(styrene-b-pnitrophenyl methacrylate) Unimolecular micelles

加速康复下肢关节置换深静脉血栓形成的相关因素

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中国矫形外科杂志 2024年第7期32卷 591-595页

作者：林才渊李志鹏张志广夏天卫张富城沈计荣南京中医药大学附属医院江苏南京210029

[目的]探讨加速康复下下肢关节置换术后深静脉血栓(deep vein thrombosis,DVT)形成的相关因素。[方法]2021年12月—2022年12月于本院行下肢关节置换的330例患者纳入本研究,观察术后DVT的发生情况,采用单因素和多因素二元逻辑回归分析探... 详细信息

[目的]探讨加速康复下下肢关节置换术后深静脉血栓(deep vein thrombosis,DVT)形成的相关因素。[方法]2021年12月—2022年12月于本院行下肢关节置换的330例患者纳入本研究,观察术后DVT的发生情况,采用单因素和多因素二元逻辑回归分析探索DVT形成的相关因素。[结果]330例患者中,术后46例患者被诊断为下肢深静脉血栓,血栓总体发生率为13.9%。血栓组患者年龄[(71.9±7.2)岁vs(64.4±14.2)岁,P<0.001]、女性占比[男/女,(7/39)vs(84/200),P=0.046]、脑梗史占比[是/否,(12/34)vs(32/252),P=0.006]及病因为OA患者占比[CD/ON/OA/RA/FX,(5/2/35/0/4)vs(42/50/157/10/25),P=0.048]、术前CRP[(9.3±8.2)mg/L vs(3.5±3.2)mg/L,P<0.001]、术后第1 d CRP[(21.4±18.5)mg/L vs(14.7±12.8)mg/L,P=0.004]显著高于非血栓组,但术中失血量[(322.2±225.4)ml vs(432.9298.6)ml,P=0.005]显著少于非血栓组,术式为UKA、TKA、AFHR的患者占比[UKA/TKA/AFHR/THA,(13/22/2/9)vs(67/82/10/125),P=0.013]显著高于非血栓组。多因素二元逻辑回归结果显示:饮酒史(OR=5.041,P=0.046)、术前CRP(OR=1.173,P=0.031)、年龄(OR=1.078,P<0.001)是下肢关节置换术后发生DVT的独立危险因素。[结论]在加速康复理念指导下下肢关节置换术后,除外肌间静脉血栓,下肢其余类型深静脉血栓发生率较低。饮酒史、术前CRP、年龄是下肢关节置换术术后DVT发生的独立危险因素。

关键词：下肢关节置换加速康复深静脉血栓危险因素

Estimation of the radionuclide distribution in sediment in coast area

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Journal of Environmental Sciences 2001年第4期13卷 398-400页

作者： SHEN Zhen-yao YANG Zhi-feng LI Wei-juan NI Shi-wei YAO Lang-gen cai yuan Institute of Environmental Science Beijing Normal UniversityState Key Joint Laboratory of Environmental Simulation and Pollution ControlBeijing 100875China China Institute for Radiation Protection Key Laboratory of Nuclear Radiation Environmental SimulationTaiyuan 030006China

The study of the radionuelide distribution in sediment is a very important aspect in environmental impact of the low level radioactive liquid waste (LLW) from coastal nuclear facilities or nuclear power plant. Even now we do not know much about it. In this paper, a simple and useful method is put forward and it is used to estimate the nuclide distribution in sediment. The result showed that the LLW from nuclear facility or nuclear power plant will do a little harm to the sediment nearby. But the harm is not very serious. Much works have to be done before full understanding of the situation.

关键词： radionuclide coast area deposit characteristic sediment

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杨迪矿替代巴西矿对烧结过程的影响机理

烧结球团 2024年第2期49卷 1-7页

作者：雷仕江杜东蔡源聂礼郝好稳高德喜易凌云李光辉首钢水城钢铁(集团)有限公司贵州六盘水553028 中南大学资源加工与生物工程学院湖南长沙410083

杨迪矿和巴西矿为国内钢铁企业大规模使用的进口矿种。为降低铁前生产成本,在烧结生产中提高廉价的杨迪矿配比已成为各大钢铁企业关注的焦点。本文基于某钢铁公司的原料条件,通过烧结杯试验系统研究杨迪矿替代巴西矿对混匀料性质和烧结... 详细信息

杨迪矿和巴西矿为国内钢铁企业大规模使用的进口矿种。为降低铁前生产成本,在烧结生产中提高廉价的杨迪矿配比已成为各大钢铁企业关注的焦点。本文基于某钢铁公司的原料条件,通过烧结杯试验系统研究杨迪矿替代巴西矿对混匀料性质和烧结过程产、质量指标的影响。结果表明:杨迪矿替代巴西矿后,烧结混合料的平均粒度减小、透气性指数略有降低,该矿替代巴西矿烧结的最佳配比为23.81%,所得烧结矿的成品率为72.03%,转鼓强度为67.07%,固体燃料消耗为69.56%;相较于基准配矿方案,转鼓强度和成品率分别提高3.31%和0.40%。烧结矿微观结构和物相分析显示:适当的杨迪矿替代比(≤23.81%)会改善黏结相侵入烧结矿孔隙中与铁矿颗粒的胶结状态,提高烧结矿强度;过高的替代比(>23.81%),会使得混合料中黏附粉的含量减少、料层温度降低,导致黏结相含量不足,烧结矿强度下降。

关键词：杨迪矿巴西矿配矿替代液相生成量矿相结构

Failsafe mechanism design of multicopters based on supervisory control theory

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IET Cyber-Systems and Robotics 2020年第1期2卷 31-42页

作者： Quan Quan Zhiyao Zhao Liyong Lin Peng Wang Walter Murray Wonham Kai-yuan cai School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191People's Republic of China School of Computer and Information Engineering Beijing Technology and Business UniversityNo.11/33 Fucheng RoadHaidian DistrictBeijing 100048People's Republic of China Department of Electrical and Computer Engineering University of TorontoTorontoON M5S 3G4Canada

In order to handle undesirable failures of a multicopter,which occurs in either the pre-flight process or the in-flight process,a failsafe mechanism design method based on supervisory control theory(SCT)is proposed for the semi-autonomous control *** failsafe mechanism is a control logic that guides what subsequent actions the multicopter should take,by taking account of real-time information from guidance,attitude control,diagnosis and other low-level *** order to design a failsafe mechanism for the multicopters,safety issues of the multicopters are ***,user requirements including functional requirements and safety requirements are textually described,where functional requirements guide the modelling of a general multicopter plant,and safety requirements cover the failsafe measures dealing with the presented safety *** on these requirements,several multicopter modes and events are *** this basis,the multicopter plant and control specifications are modelled by ***,a supervisor is synthesized by using *** addition,the authors present three examples to demonstrate the potential conflicting phenomena due to the inappropriate design of control ***,based on the obtained supervisor,an implementation method suitable for multicopters is presented,in which the supervisor is transformed into decision-making codes.

关键词： mechanism theory dealing

A Special Additive Enables All Cations and Anions Passivation for Stable Perovskite Solar Cells with Efficiency over 23%

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Nano-Micro Letters 2021年第11期13卷 142-154页

作者： Wenjing Zhao Jie Xu Kun He yuan cai Yu Han Shaomin Yang Sheng Zhan Dapeng Wang Zhike Liu Shengzhong Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science&EngineeringShaanxi Normal UniversityXi’an 710119People’s Republic of China Dalian National Laboratory for Clean Energy iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023People’s Republic of China

Passivating undercoordinated ions is an effective way to reduce the defect densities at the surface and grain boundaries(GBs)of perovskite materials for enhanced photovoltaic performance and stability of perovskite solar cells(PSCs).Here,(BBF)complex is chosen as a multifunctional additive,which contains both C7H9N and BF3 groups working as Lewis base and Lewis acid,respectively,can bond with Pb^(2+)/I^(−) and FA+on the surface and in the GBs in the perovskite film,affording passivation of both cation and anion *** synergistic effect of the C7H9N and BF3 complex slows the crystallization during the perovskite film deposition to improve the crystalline quality,which reduces the trap density and the recombination in the perovskite film to suppress nonradiative recombination loss and minimizes moisture permeation to improve the stability of the perovskite ***,such an additive improves the energy-level alignment between the valence band of the perovskite and the highest occupied molecular orbital of the hole-transporting material,***,our work achieves power conversion efficiency of 23.24%,accompanied by enhanced stability under ambient conditions and light illumination and opens a new avenue for improving the performance of PSCs through the use of a multifunctional complex.

关键词： Additives Simultaneous passivation Combined effects High efficiency Perovskite solar cells

Expression, Purification, Crystallization and Molecular Replacement Studies of TorI, an Inhibition Protein of Tor System

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Chinese Journal of Structural Chemistry 2007年第5期26卷 594-598页

作者： HUANG Wei yuan cai Ansaldi Mireille Morelli Xavier Edward J. Meehan CHEN Li-Qing HUANG Ming-Dong State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China Graduate School of the Chinese Academy of Sciences Beo＇ing 100039 China Laboratoire de Chimie Bacte＇rienne Institut de Biologie Structurale et Microbiologie CentreNational de la Recherche Scientifique 31 Chemin Joseph Aiguier 13402 Marseille Cedex 20 France Laboratoire de Chimie Bactoéienne CNRS/IBSM BIP Laboratory 31 Chemin Joseph Aiguier 13402 Marseille Cedex 20 France Laboratory for Structural Biology Department of Chemistry Graduate Programs of Biotechnology Chemistry and Materials Science University of Alabama in Huntsville Huntsville AL 35899 USA

TorI, a Tor system inhibitor acting through protein-protein interaction with the TorR response regulator, is an excisionase that interacts with the integrase and DNA during prophage excision. It has been crystallized by the vapor-diffusion method using polyethylene glycol 3350 as a precipitant at pH 8.5. The X-ray diffraction data sets from the TorI crystal was collected at a resolution of 2.1 , using a synchrotron source. The crystal belongs to primitive monoclinic lattice with cell parameters of 46.210 × 53.992 × 73.561A

关键词： Torl inhibitor crystallization X-ray diffraction

Synchronous Synthesis of Polymeric Vesicles with Controllable Size and Low-Polydispersity by Polymerization-Induced Self-Assembly

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Chinese Journal of Chemistry 2022年第4期40卷 453-459页

作者： Ren-Man Zhu Cheng-Lin Yang Zi-Xuan Chang cai-yuan Pan Wen-Jian Zhang Chun-Yan Hong CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefeiAnhui 230026China Institute of Physical Science and Information Technology Anhui UniversityHefeiAnhui 230601China

Comprehensive Summary The size and size distribution of polymeric nanoparticles have great impact on their physicochemical and biological ***-induced self-assembly(PISA)has been demonstrated to be an efficient method to fabricate various polymeric nanoparticles,among which polymeric vesicles have attracted great interest due to their unique hollow structure.

关键词： Polymerization-induced self-assembly RAFT dispersion polymerization Vesicles Block copolymers Nanoparticles

PBL教学法联合双语教学在医学美容教育中的应用及挑战

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继续医学教育 2024年第4期38卷 57-60页

作者：王晶蔡原文洋曾霓张兰方孙娜娜遵义医科大学附属医院美容皮肤科贵州遵义563003 遵义医科大学附属医院皮肤科贵州遵义563003

作为理论性和实践性很强的一门学科,医学专科知识体系庞大、内容繁杂,理论基础较难理解,然该学科发展迅猛、更新日新月异,日显教学的重要性和必要性。其中美容医学专业又尤为强调技术与实践的结合,而传统的医学模式往往注重理论灌输,缺... 详细信息

作为理论性和实践性很强的一门学科,医学专科知识体系庞大、内容繁杂,理论基础较难理解,然该学科发展迅猛、更新日新月异,日显教学的重要性和必要性。其中美容医学专业又尤为强调技术与实践的结合,而传统的医学模式往往注重理论灌输,缺乏临床结合,导致实践应用的局限和片面,且因美容医学专业在本科教学中所占学时不足,普遍存在理论课传授知识有限,实习所见的前沿技术在理论授课时并未提及的现实情况。因此,如何提高教学质量、化繁为简、深入浅出,培养学生理论联系实际、学以致用的能力,是教研室迫切需要解决的问题。文章就以问题为基础的教学法(problem-based learning,PBL)联合双语教学,探讨该模式在医学美容教学中的研究与应用,以期为教学改革提供有利的借鉴和指导。

关键词：以问题为基础的教学法双语教学传统教学医学美容主动性应用

Printable,flexible ceramic fiber paper based on electrospinning

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Rare Metals 2024年第6期43卷 2739-2746页

作者： Yong-Shuai Xie yuan Cheng Yang Lyu Rui Li Jie-cai Han National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150001China State Key Laboratory of Intelligent Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China

Based on the fact that it is challenging for the polymer flexible circuit substrates to meet the requirements of serving in high-temperature environments,this work proposed the idea of using printable ceramic fiber paper as a high-temperature flexible circuit substrate.A ceramic fiber paper with all ceramic components had been developed via electrospinning,solving the problems of low strength and severe strength drop at high temperatures of traditional ceramic fiber *** tensile strength of the prepared ceramic fiber paper is 2.63 MPa,and the reliable service temperature is 1200℃.Its bulk density is about 1.5 times that of traditional ceramic fiber *** can be printed with patterns by commercial inkjet printers like ordinary printing paper and has excellent *** feasibility of ceramic fiber paper as a flexible circuit substrate was verified by constructing a simple *** the fiber paper is significantly bent,the circuit still forms a complete path,which proves that it has a strong application potential for high-temperature flexible circuit substrate and is expected to promote the development of flexible electronic devices serving at extreme high-temperature environments.

关键词： Ceramic fiber paper High temperature Inkjet printing Flexible electronic