检索结果-南通市图书馆

STUDY ON THE INTRAMOLECULAR CYCliZATION THROUGH OPENING OF EPOXIDE I CYCliZATION OF N-METHYL-N-BENZOYLMETHYLENE-β-PHENYL-α,β-EPOXYPROPIONAMIDE IN APROTIC SOLVENT

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1993年第12期4卷 1035-1036页

作者： guang zhong YANG li Hong WANG liang HUANG Institute of Matena Medica,Chinese Academy of Medical Sciences ■Xian Nong Tan St,Beijing,100050

Intramolecular cyclization of A catalyzed by IDA in benzene or THF yields two γ-lactams through C-alkylation and one δ-and one 7-membered lactam by O-alkylation.

关键词： Chen PHENYL STUDY ON THE INTRAMOLECULAR CYCliZATION THROUGH OPENING OF EPOXIDE I CYCliZATION OF N-METHYL-N-BENZOYLMETHYLENE EPOXYPROPIONAMIDE IN APROTIC SOLVENT

在线全文

学校读者我要写书评

暂无评论

近世日本对中国中医药的受容

安徽史学 2018年第3期 111-116,137页

作者：仲光亮李成杰山东大学外国语学院山东济南250100 山东体育学院党委组织部山东济南250102

近世日本未与中国建立官方关系,但两国间的文化交流并未中断。本文从日本江户幕府经由长崎贸易渠道购入中国中医药书籍、招募中国民间医师、购入中药药种和药苗三个方面考察了近世日本对中国中医药的受容,并从政治和经济层面初步分析了... 详细信息

近世日本未与中国建立官方关系,但两国间的文化交流并未中断。本文从日本江户幕府经由长崎贸易渠道购入中国中医药书籍、招募中国民间医师、购入中药药种和药苗三个方面考察了近世日本对中国中医药的受容,并从政治和经济层面初步分析了近世日本引进中国中医药的原因。

关键词：日本江户幕府中国中医药

Dynamic Regulation of Hydrogen Bonding Networks and Solvation Structures for Synergistic Solar‑Thermal Desalination of Seawater and Catalytic Degradation of Organic Pollutants

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 548-565页

作者： Ming‑Yuan Yu Jing Wu guang Yin Fan‑Zhen Jiao zhong‑Zhen Yu Jin Qu Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China State Key Laboratory of Organic‑Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China

Although solar steam generation strategy is efficient in desalinating seawater,it is still challenging to achieve continuous solar-thermal desalination of seawater and catalytic degradation of organic ***,dynamic regulations of hydrogen bonding networks and solvation structures are realized by designing an asymmetric bilayer membrane consisting of a bacterial cellulose/carbon nanotube/Co_(2)(OH)_(2)CO_(3)nanorod top layer and a bacterial cellulose/Co_(2)(OH)_(2)CO_(3)nanorod(BCH)bottom ***,the hydrogen bonding networks inside the membrane can be tuned by the rich surface–OH groups of the bacterial cellulose and Co_(2)(OH)_(2)CO_(3)as well as the ions and radicals in situ generated during the catalysis ***,both SO_(4)^(2−)and HSO_(5)−can regulate the solvation structure of Na^(+)and be adsorbed more preferentially on the evaporation surface than Cl^(−),thus hindering the de-solvation of the solvated Na^(+)and subsequent nucleation/growth of ***,the heat generated by the solar-thermal energy conversion can accelerate the reaction kinetics and enhance the catalytic degradation *** work provides a flow-bed water purification system with an asymmetric solar-thermal and catalytic membrane for synergistic solar thermal desalination of seawater/brine and catalytic degradation of organic pollutants.

关键词： Solar steam generation Seawater desalination Catalytic degradation Bacterial cellulose Cobalt hydroxycarbonate nanorods

A New Genus of Volvocales（Chlorophyta）——Hirtusochloris

在线全文

学校读者我要写书评

暂无评论

A New Genus of Volvocales（Chlorophyta）——Hirtusochloris

中国藻类学会第十一次学术讨论会

作者： Hu Hong-jun, Luo li-ming, li Ye-guang, li zhong-kui, Ouyang Ye-xin, Geng Ya-hong (Institute of Bontany, the Chinese academy of Science, Wuhan, P. R. China, 430074)

＜正＞ Order Volvocales is one of the largest group of Chlorophyta. One new genus of Volvocales（Chlorophyta）, Hirtusochloris, is described in this paper.

关键词： genus Volvocales Hirtusochtoris.

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

对接仰焊板操作探析

南方金属 2017年第4期 53-55页

作者：黄钟光潘立业广东松山职业技术学院广东韶关512126

通过改变焊机极性的方法消除了仰焊位置焊接试件背面成形内凹的缺陷,使背面焊缝成形高出母材1~2mm.通过工艺改进,在保证焊接接头各项机械性能都符合规定的前提下,也使得试件正反面的焊缝外观检测符合要求,解决了仰焊位置背面成形内凹的... 详细信息

通过改变焊机极性的方法消除了仰焊位置焊接试件背面成形内凹的缺陷,使背面焊缝成形高出母材1~2mm.通过工艺改进,在保证焊接接头各项机械性能都符合规定的前提下,也使得试件正反面的焊缝外观检测符合要求,解决了仰焊位置背面成形内凹的难题.

关键词：仰焊极性焊接工艺参数熔池

在线全文

学校读者我要写书评

暂无评论

对接横焊板操作探析

科技创新与生产力 2017年第4期 100-102页

作者：黄钟光潘立业广东松山职业技术学院广东韶关512126

针对对接横焊板操作中存在的电弧偏吹问题,简要介绍了电弧偏吹现象原理,通过改变试件接地线位置的方法,克服了焊接过程中产生的电弧偏吹问题,保证了焊接过程顺利进行,进一步阐述了操作过程和施焊工艺,在保证焊接接头各项机械性能都符合... 详细信息

针对对接横焊板操作中存在的电弧偏吹问题,简要介绍了电弧偏吹现象原理,通过改变试件接地线位置的方法,克服了焊接过程中产生的电弧偏吹问题,保证了焊接过程顺利进行,进一步阐述了操作过程和施焊工艺,在保证焊接接头各项机械性能都符合规定的前提下,使得试件正反面的焊缝外观检测符合要求。

关键词：横焊电弧偏吹运条方法焊接电流

提高超宽带冲激无线电信号抗单频干扰能力的参数选择方法

在线全文

学校读者我要写书评

暂无评论

通信学报 2004年第12期25卷 131-137页

作者：罗娟岳光荣李仲令李少谦电子科技大学抗干扰通信技术国家级重点实验室四川成都610054

针对三种超宽带冲激无线电信号(TH-PPM、TH-PAM和DS-UWB)在强单频干扰下的存在误码率恶化的情况,通过理论分析和计算机仿真验证,分析了影响超宽带冲激无线信号抗单频干扰能力的主要系统参数,提出了提高三种超宽带无线电信号抗单频干扰... 详细信息

针对三种超宽带冲激无线电信号(TH-PPM、TH-PAM和DS-UWB)在强单频干扰下的存在误码率恶化的情况,通过理论分析和计算机仿真验证,分析了影响超宽带冲激无线信号抗单频干扰能力的主要系统参数,提出了提高三种超宽带无线电信号抗单频干扰能力的系统参数选择方法。采用这种参数选择方法,可主动降低甚至消除干扰信号对超宽带冲激无线电信号的干扰,降低超宽带冲激无线电接收机设计的复杂性。

关键词：超宽带无线电冲激无线电单频干扰 UWB 无线信号误码率接收机电信号恶化降低

High‑Entropy Electrode Materials:Synthesis,Properties and Outlook

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第1期17卷 472-506页

作者： Dongxiao li Chang liu Shusheng Tao Jieming Cai Biao zhong Jie li Wentao Deng Hongshuai Hou Guoqiang Zou Xiaobo Ji College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083People’s Republic of China School of Chemistry and Chemical Engineering Hunan Institute of EngineeringXiangtan 411104People’s Republic of China

High-entropy materials represent a new category of high-performance materials,first proposed in 2004 and extensively investigated by researchers over the past two *** definition of high-entropy materials has continuously *** the last ten years,the discovery of an increasing number of high-entropy materials has led to significant advancements in their utilization in energy storage,electrocatalysis,and related domains,accompanied by a rise in techniques for fabricating high-entropy electrode ***,the research emphasis has shifted from solely improving the performance of high-entropy materials toward exploring their reaction mechanisms and adopting cleaner preparation ***,the current definition of high-entropy materials remains relatively vague,and the preparation method of high-entropy materials is based on the preparation method of single metal/low-or medium-entropy *** should be noted that not all methods applicable to single metal/low-or medium-entropy materials can be directly applied to high-entropy *** this review,the definition and development of high-entropy materials are briefly ***,the classification of high-entropy electrode materials is presented,followed by a discussion of their applications in energy storage and catalysis from the perspective of synthesis ***,an evaluation of the advantages and disadvantages of various synthesis methods in the production process of different high-entropy materials is provided,along with a proposal for potential future development directions for high-entropy materials.

关键词： High-entropy Energy storage Electrode materials

在线全文

学校读者我要写书评

暂无评论

运动控制系统中的光栅尺

机电工程技术 2016年第9期45卷 7-10,95页

作者：李丽曹广忠李玲明河源理工学校广东河源517000 深圳大学广东深圳518060

对运动控制系统中的光栅尺进行了综述。介绍了光栅尺的测量原理和结构模型,阐述了直线位移测量中的传感器种类和光栅尺的主要特点。从量程、分辨率和栅距等方面说明了选择光栅尺时主要参考的性能指标,对封闭式、敞开式、增量式和绝对式... 详细信息

对运动控制系统中的光栅尺进行了综述。介绍了光栅尺的测量原理和结构模型,阐述了直线位移测量中的传感器种类和光栅尺的主要特点。从量程、分辨率和栅距等方面说明了选择光栅尺时主要参考的性能指标,对封闭式、敞开式、增量式和绝对式光栅尺的主要国内外生产公司和代表产品做了对比和应用场合的分析,对光栅尺在运动控制系统中的使用有一定的指导作用。

关键词：位移检测光栅尺光栅干涉