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SYNTHESIS OF 1-O-ACYL-2,3,4-TRI-O-ACETYL-β-d-XYLO-ANd ARABINOPYRANOSES BY PHASE TRANSFER CATALYSIS

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Chinese Chemical Letters 1992年第3期3卷 163-164页

作者： Guan Zhong SHUN liang Ju XUE Chemistry department Xinjiang UniversityUrumqi830046

The acetylated xylo-and arabinopyranosyl esters(1-8) were obtained in high yields with stereoselectivity by phase-transfer catalyzed (PTC) synthesis, and their structures were confirmed by elemental analysis and IR,^(... 详细信息

关键词： d-XYLO-ANd ARABINOPYRANOSES BY PHASE TRANSFER CATALYSIS SYNTHESIS OF 1-O-ACYL-2,3,4-TRI-O-ACETYL

Study of digital Management System of Milking Process on Large-Sized dairy Farm

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Agricultural Sciences in China 2008年第8期7卷 1022-1028页

作者： XIOng Ben-hai LUO Qing-yao Lǔ Jian-qiang YAng liang State Key Laboratory of Animal Nutrition~Institute of Animal Sciences Chinese Academy of Agricultural Sciences Beijing 100193 P.R.China

This study was to supply the systemic and full milking process data to support the implementation of both dairy herd improvement （dHI） and digital feed.ng of dairy cattle. This study designed the relational structured database and developed a set of digital management information system on milking process of intensive dairy farm using Visual Basic 6.0, Access databases, and Crystal report combining the milking characteristics of a grown cow, such as quality and sanitation testing indexes of raw milk. The system supplies a series of convenient, intelligent input interfaces of crude datum, and can count, analyze, and graphically show milking datum based on different types and different parities of cows or herds in a specific duration, and can dynamically produce some important derived data, such as days of grown cow, daily average of milk production of grown cow, days of cow milk production, and daily average of milking cow production; and can carry out all-pervasive data mining. With the help of system analysis and software design techniques, it is possible to realize precision farming for a dairy cattle herd based on whole digital management of milking process and realtime prediction on nutrient requirements and ration of dairy cattle, as well as dairy herd improvement.

关键词： dairy farm dairy herd improvement (dHI) grown cow milking digital management

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减盐黄豆酱发酵过程指标变化规律

食品工业 2024年第1期45卷 1-4页

作者：梁亚男赵欠周鑫王艳张丽黄艳重庆德庄农产品开发有限公司重庆火锅调味品及菜品工程技术中心重庆401336

黄豆营养丰富,黄豆酱味道丰富、鲜美,为了迎合大众对减盐健康食品的需求,使用黄豆进行制曲、发酵得到减盐黄豆酱,并监测发酵过程中理化指标的变化规律。通过相关性分析,感官评分与氨基酸态氮含量呈现显著正相关(P<0.05),说明氨基酸态氮... 详细信息

黄豆营养丰富,黄豆酱味道丰富、鲜美,为了迎合大众对减盐健康食品的需求,使用黄豆进行制曲、发酵得到减盐黄豆酱,并监测发酵过程中理化指标的变化规律。通过相关性分析,感官评分与氨基酸态氮含量呈现显著正相关(Pd达到发酵终点,发酵成熟的黄豆酱水分含量为56.3%,盐分含量为5.2%,总酸含量为1.28%,氨基酸态氮含量为0.62%,感官评分为28分(满分30分)。以减盐黄豆酱为基底,与减盐发酵辣椒酱混合后发酵可得到减盐黄豆瓣酱,可在一定程度上拓宽麻辣调味品开发与加工过程的原料丰富程度。

关键词：黄豆发酵减盐黄豆酱指标变化工艺开发

Enhanced proton irradiation resistance in Cs-doped CH_(3)NH_(3)PbI_(3) films and solar cells

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Journal of Energy Chemistry 2022年第6期31卷 261-269,I0008页

作者： Pan Luo Xue-Yin Sun Hao Jiang Li Yang Yang Li Wen-Zhu Shao liang Zhen Cheng-Yan Xu School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of TechnologyHarbin 150001HeilongjiangChina MOE Key Laboratory of Micro-Systems and Micro-Structures Manufacturing Harbin Institute of TechnologyHarbin 150080HeilongjiangChina Sauvage Laboratory for Smart Materials School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055GuangdongChina

Mixed-cation perovskite solar cells have attracted tremendous attention in space applications due to their excellent power conversion efficiency (PCE) and stability to light and *** the evolution of photovoltaic performance in different space environments has been investigated,the role of inorganic cesium ions (Cs^(+)) in the enhancement of irradiation resistance needs to be further ***,the structure and performance evolution of Cs-doped CH_(3)NH_(3)PbI_(3)(MAPbI_(3)) films and planar heterojunction devices under proton irradiation up to 1×10^(16)p cm^(-2) were studied.5%of Cs^(+) doping can increase the cohesive energy of MAPbI_(3)and effectively alleviate the lattice strain induced by proton irradiation,thereby enhancing the crystallinity and stability of *** bandgap changes of irradiated Cs_(0.05)MA_(0.95)PbI_(3) films under the identical fluence were only one third of that of MAPbI_(3) *** irradiation under the fluence of 1×10^(14)p cm^(-2),the density of trap states in the undoped and 5%Cs-doped films increased by 71%and 9%,respectively,and the average PCE of 20 correspond.ng devices decreased only by 12%and 9%,*** proves that the replacement of organic methylamine ion with inorganic cesium ion contributes to the improvement of MAPbI_(3) resistance to proton irradiation,thus confirming the application prospects of mixed-cation or all-inorganic perovskite solar cells in spacecraft.

关键词： Proton irradiation Perovskite solar cells Cesium doping Irradiation resistance

Two-dimensional mechanical analysis of superconducting double-aperture quadrupole magnet prototype for CEPC

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Radiation detection Technology and Methods 2019年第4期3卷 46-50页

作者： Xiangchen Yang Yingshun Zhu Ran liang Fusan Chen Institute of High Energy Physics Chinese Academy of SciencesBeijingChina

Introduction The circular electron-positron collider(CEPC)with a circumference about 100 km,a beam energy up to 120 GeV is proposed by the Institute of High Energy *** heart of the CEPC is a double-ring collider with two interaction *** each side of the collision point,superconducting double-aperture quadrupole magnets based on cos2θdesign which is named Qd0 and QF1 separately are *** kind of superconducting magnet is designed first time in *** stability analysis is very important for superconducting magnet before *** paper mainly focused on the mechanical analysis of the prototype for *** and methods A 2d 2-layers model was developed using ANSYS to simulate the stress distribution in the coil from collaring process at room temperature to low temperature *** As part of the CEPC project,a 40 mm bore diameter superconducting double-aperture quadrupole magnet named Qd0 is being designed and the physical calculation has been *** paper introduces the mechanical design,simulation model of prototype for Qd0,and mainly expounds on stress *** stress distribution during 4 stages includ.ng collaring(load application),collaring(inserting keys),cooling down and excitation is described in detail.

关键词： Superconducting quadrupole cos2θ Collar Stress

An Optimum Method for a Grooved 2d Planar Ion Trap design

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Chinese Physics Letters 2011年第7期28卷 111-113页

作者： JI Wei-Bang WAN Jin-Yin CHEng Hua-d.ng LIU liang Key Laboratory for Quantum Optics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800

We investigate an effective grooved 2d ion chip design and optimize the ratio between the size of the rf electrodes and the *** calculate the optimal size of the groove using the analytical model,which was introduced by House,and the optimum result is *** also obtain the simulated scattering points with the finite element analysis *** analytical curve and simulated scattering points are coincident with each *** is shown that this analytical model also fits for the grooved planar ion *** the optimum grooved 2d planar ion chip design could be *** is effective for scalable quantum information processing.

关键词： optimum planar processing

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一种烟叶自动打包机的设计与压板结构优化

现代机械 2024年第2期 73-78页

作者：赵彦淇周元华廖婧周鑫杰冯亮长江大学机械工程学院湖北荆州434023

针对烟叶包装过程中存在的烟叶自身体积大、包装设备的自动化程度低、过程复杂等问题,设计了一款烟叶自动打包机装置,并对烟叶打包机最容易发生损伤的烟叶压板进行模拟仿真。基于SolidWorks三维建模软件绘制打包机所需要的三大结构,对... 详细信息

针对烟叶包装过程中存在的烟叶自身体积大、包装设备的自动化程度低、过程复杂等问题,设计了一款烟叶自动打包机装置,并对烟叶打包机最容易发生损伤的烟叶压板进行模拟仿真。基于SolidWorks三维建模软件绘制打包机所需要的三大结构,对液压系统做了相关计算以及设计液压系统原理图;应用ANSYS Workbench响应面优化模块对烟叶压板的结构进行优化,其最大等效应力由99.381 MPa减小到82.338 MPa,减小率为17.15%,最大变形由0.1230 mm减小到0.1132 mm,减小率为7.9%。

关键词：烟叶打包机自动化 PLC 响应面优化

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二维BiOX光催化去除废水中RhB的研究

宝鸡文理学院学报（自然科学版） 2024年第2期44卷 43-49页

作者：张飞耀吴嘉薇郑红亮连晓燕宝鸡文理学院化学化工学院先进分子工程材料重点实验室陕西宝鸡721013 陕西长岭电子科技有限责任公司陕西宝鸡721006

目的研究二维(2d)卤氧化铋(BiOX,X=Cl,Br,I)对水中罗丹明B(RhB)的去除性能和机理。方法通过溶剂热法合成2d BiOX。借助多种表征手段对BiOX的结构、形貌、光学性质等进行分析;研究紫外-可见光照下2d BiOX对水中RhB的光催化去除性能。结果... 详细信息

目的研究二维(2d)卤氧化铋(BiOX,X=Cl,Br,I)对水中罗丹明B(RhB)的去除性能和机理。方法通过溶剂热法合成2d BiOX。借助多种表征手段对BiOX的结构、形貌、光学性质等进行分析;研究紫外-可见光照下2d BiOX对水中RhB的光催化去除性能。结果BiOCl催化作用下,光照180 min后,RhB降解率可达98.8%。过程符合拟一阶反应动力学模型,反应速率常数k为22.9×10^(-3)min^(-1)。以叔丁醇和氯仿为捕获剂时,RhB降解率无明显变化;而以乙二胺四乙酸二钠和重铬酸钾为捕获剂时,RhB降解率显著下降。结论BiOCl的光催化活性高,可归因于其较快的载流子传递速率和较强的氧化还原能力。RhB光催化降解过程中起主要作用的活性物种为h^(+)和e^(-)。

关键词： 2d BiOX 光催化 RhB 机理

Recent advances and research progress on microsystems and bioeffects of terahertz neuromodulation

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Microsystems & Nanoengineering 2023年第6期9卷 25-41页

作者： Meiting Liu Juntao Liu Wei liang Botao Lu Penghui Fan Yilin Song Mixia Wang Yirong Wu Xinxia Cai State Key Laboratory of Transducer Technology Aerospace Information Research InstituteChinese Academy of SciencesBeijing100190China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing100049China

Terahertz waves can interact with the nervous system of organisms under certain *** to common optical modulation methods,terahertz waves have the advantages of low photon energy and low risk;therefore,the use of terahertz waves to regulate the nervous system is a promising new method of ***,most of the research has focused on the use of terahertz technology for biodetection,while relatively little research has been carried out on the biological effects of terahertz radiation on the nervous system,and there are almost no review papers on this *** the present article,we begin by reviewing principles and objects of research regard.ng the biological effects of terahertz radiation and summarizing the current state of related research from a variety of aspects,includ.ng the bioeffects of terahertz radiation on neurons in vivo and in vitro,novel regulation and detection methods with terahertz radiation devices and neural microelectrode arrays,and theoretical simulations of neural information encod.ng and *** addition,we discuss the main problems and their possible causes and give some recommendations on possible future *** paper will provide insight and assistance to researchers in the fields of neuroscience,terahertz technology and biomedicine.

关键词： breakthrough neural microelectrode