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Synthesis of 1H-thiopyrano[3,4-b] Quinolin-4(3H)-one and TheirHeterocycle Fused Compounds

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Chinese Chemical Letters 1997年第1期8卷 5-6页

作者： Yong Jun GAO Feng Jun LI hi Shan JIANG(Department of Chemistry, Yanbian University, Yani, Jilin, 133002)Shi Chen ZHOU(Department of Chemistry, Jinzhou Teacher’s College, Jinzhou 121000) Department of Chemistry Yanbian University Yanji Jilin 133002 China Department of Chemistry Jinzhou Teacher's College Jinzhou 121000 China

1H-Thiopyrano[3,4-b] quinolin-4(3H)-one 1, a new series of heterotricyclic ketone and their heterocycle fused compounds (2 and 3) were prepared by a simple procedure in good yields.

关键词： CHD Quinolin-4 Synthesis of 1H-thiopyrano[3,4-b one and TheirHeterocycle Fused Compounds

PREPARING NANO-CRYSTALLINE La DOPED WC/Co POWDER BY hiGH ENERGY BALL MILLING

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Acta Metallurgica Sinica(English Letters) 2002年第5期15卷 448-452页

作者： S. Liu, D.Q. Yi, Y.X. Li and D.ZouSchool of Materials Science & Engineering, Central South University, Changsha 410083, ChinaHunan Yin Zhou Nonferrous Metals hi.-Tech. Limited Company, Changsha 410083, China Sch. of Mat. Sci. and Eng. Central South Univ. Changsha 410083 China Nonferrous Metals hi.-Tech. Co. Changsha 410083 China

The La doped WC/Co powder was prepared by high energy ball milling. The changes of crystal structure, micrograph and defect of the powder were investigated by means of XRD (X-ray diffraction), SEM (scanning electron microscope) and DTA (differential thermal analysis). The results show that adding trace La element into carbides is effective to minish the grain size of WC/Co powder. The La doped carbides powder with grain size of 30nm can be obtained after 10h ball milling. The XRD peak of Co phase disappeared after 20h ball milling, which indicated solid solution (or secondary solid solution) of Co phase in WC phase. The La doped powder with grain size of 10nm is obtained after 30h ball milling. A peak of heat release at the temperature of 470℃ was emerged in DTA curve within the range of heating temperature, which showed that the crystal structure relaxation of the powder appeared in the process of high energy ball milling. After consolidated the La doped WC/Co alloy by high energy ball milling exhibits ultra-fine grain sizes and better mechanical properties.

关键词： cemented carbide nano-crystalline powder rare earth high en-ergy ball milling

VARIABLE STRUCTURE CONTROL OF AIRCRAFTFOR ATMOSPHERIC DISTURBANCE

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Chinese Journal of Aeronautics 1995年第4期8卷 247-255页

作者： Zhu Xiaoping Zhou Zhou(Nanjing University of Aeronautics and Astronautics, Nanjing, China, 210016)Chen Shilu(Northwestern Polytechnical University, hi’an, China, 710072)

Variable structure control (VSC) applied to atmospheric disturbance sup-pression is presented. The conditions are stipulated: the sliding mode existenee condi-tion, and invanance condition of atmospheric disturbanee in the variable structuresystem (VSS). A method of eigenstructure assignment technique for switching surfaeedesign is proposed. Based on different atmospheric disturbanee characteristics, such asrandom turbulence, discrete gust and wind shear, two kinds of control laws are derived that possess strong robustness. An example shows that this control approach isfeasible and effective.

关键词： atmospheres disturbances variable geometry structures control air-craft

A Hybrid Aluminum/Hydrogen/Air CellmCommon Cathode

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Journal of Energy and Power Engineering 2014年第11期8卷 1889-1894页

作者： Lei Wang Fude Liu Wentao Wang Dawei Zheng Huizhi Wang Michael Kow-hi Leung Department of Mechanical Engineering The University of Hong Kong Hong Kong China School of Energy and Environment The City University of Hong Kong Hong Kong China SINANO (Suzhou Institute of Nano-Tech and Nano-Bionics) Chinese Academy of Sciences Suzhou 215123 China

Metal/Air batteries are considered to be promising electricity storage devices given their compactness, environmental benignity and affordability. As a commonly available metal, aluminum has received great attention since its first use as an anode in a battery. Its high specific energy （even better volumetric energy density than lithium） makes it ideal for many primary battery applications. However, the development of A1/Air cell with alkaline electrolyte has been lagged behind mainly due to the unfavorable parasitic hydrogen generation. Herein, we designed and constructed a novel A1/H_2/Air tandem fuel cell to turn the adverse parasitic reaction into a useful process. The system consists of two anodes, namely, aluminum and hydrogen, and one common air-breathing cathode. The aluminum acts as both the anode for the A1/Air sub-cell and the source to generate hydrogen for the hydrogen/air sub-cell. The aluminum/air sub-cell has an open circuit voltage of 1.45 V and the H_2/Air sub-cell of 0.95 V. We demonstrated that the maximum power output of aluminum as a fuel was largely enhanced by 31% after incorporating the H_2/Air sub-cell with the tandem concept. In addition, a passive design was utilized in our tandem system to eliminate the dependence on auxiliary pumping sub-systems so that the whole system remained neat and eliminated the dependence of energy consuming pumps or heaters which were typically applied in micro fuel cells.

关键词： Al/Air battery hydrogen fuel cell passive fuel cell utilization efficiency tandem fuel cell.

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药物滥用者健康认知与维护行为的实证研究

医学与哲学 2023年第1期44卷 76-80,F0003页

作者：施胜烽中国医药大学公共卫生学院中国台湾台中404333 集美大学海洋文化与法律学院福建厦门361021

参考健康信念模式自行设计结构式问卷调查,以药物滥用者为研究对象,运用双变项分析检定不同健康信念之疾病认知的就医行为是否有差异。自觉严重性与自觉障碍性药物滥用者就医意愿差异有统计学意义(χ^(2)=28.0,P<0.001)。自觉严重性与... 详细信息

参考健康信念模式自行设计结构式问卷调查,以药物滥用者为研究对象,运用双变项分析检定不同健康信念之疾病认知的就医行为是否有差异。自觉严重性与自觉障碍性药物滥用者就医意愿差异有统计学意义(χ^(2)=28.0,P<0.001)。自觉严重性与自觉障碍性越低且无社会保险的药物滥用者,其就医意愿则越低(χ^(2)=47.807,P<0.001)。劳动力人口中,毒品花费越高和第一次接触毒品年龄越大的药物滥用者,其就医花费亦越高(r=0.522,P<0.001)。加强药物滥用者对疾病的认知提升其求医行为、降低疾病感染率,增加就医管道避免疾病恶化造成社会资源浪费,以供后续政策拟定与医疗质量改善之参考依据。

关键词：药物滥用就医行为健康信念模式

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灭火指挥数据挖掘研究

微电子学与计算机 2016年第4期33卷 141-143页

作者：施伟荣上海市宝山区公安消防支队司令部上海201901

根据火灾和灭火大数据中挖掘数据的关联性,将具有相关联的的属性值和频繁出现的属性值提取出来,建立关联规则,并通过大数据挖掘Apriori算法准确提高灭火指挥数据应用的准确性.讨论Apriori关联规则算法的改进,降低对数据库的扫描次数,减... 详细信息

根据火灾和灭火大数据中挖掘数据的关联性,将具有相关联的的属性值和频繁出现的属性值提取出来,建立关联规则,并通过大数据挖掘Apriori算法准确提高灭火指挥数据应用的准确性.讨论Apriori关联规则算法的改进,降低对数据库的扫描次数,减少后选集的生成,提高灭火指挥数据的数据挖掘性能和效率,满足灭火指挥数据建设需求.

关键词：灭火指挥数据挖掘 Apriori算法改进