Quantum Corrections to the Radiation of Schwarzschild-anti-de Sitter Black Hole with Topological Defect

We extend Zhang and Zhao＇s recent work to the Schwarzschild-anti-de Sitter black hole with topological defect, whose Arnowitt-Deser-Misner （ADM） mass is no longer identical to its mass parameter. The behavior of the tunneling massive particle is investigated and the emission rate is calculated. The result satisfies an underlying unitary theory and takes the same functional form as that of the mass-less particle.     

Lie-Form Invariance of a Type of Non-holonomic Singular Systems

In this paper, the Lie-form invariance of a type of non-holonomic singular systems is studied. The differential equations of motion of the systems are given. The definition and the criterions of the Lie-form invariance for the systems are presented. The Hojman conserved quantity and the Mei conserved quantity are obtained. An example is given to illustrate the application of the results.     

第十二届全国周培源大学生力学竞赛(个人赛)试题

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《化学通报》网络版(Chemistry Online)2001年5月论文摘要

引用方法 :作者 (多位作者间以逗号隔开 ) .题目 .化学通报 ,年 ,卷 :Ｗ××× (×××为网络版目次中序号的后三位 ) .[Ｗ 0 1 0 4 3]多对强反应电解质形成的多移动化学反应界面研究Ｍｕｌｔｉ ｍｏｖｉｎｇＣｈｅｍｉｃａｌＲｅａｃｔｉｏｎＢｏｕｎｄａｒｉｅｓＦｏｒｍｅｄｂｙＭｕｌｔｉ ｐａｉｒｓｏｆＳｔｒｏｎｇＲｅａｃｔｉｏｎＥｌｅｃｔｒｏｌｙｔｅｓ周天承 (芜湖职业技术学院轻化系　安徽芜湖　 2 4 1 0 0 1 )文章推导出了由多对强反应电解质形成的多移动化学反应界面方程 (ＭＭＣＲＢＥ :Ｓ) ,通过与移动化学反应界面方程 (…     

COMPLEX POWER OF HERMITE OPERATOR

In this paper the authors define complex power of Hermite operator and give some applications in Riemann Zeta function.     

科学技术期刊只有两个级别 ——“国家级”和“地方级”

国家科委和国家新闻出版署１９９１年第１２号令发布的《科学技术期刊管理办法》第六条说：“科学技术期刊,按其主管部门分为全国性期刊和地方性期刊。全国性期刊是指国务院所属各部门、中国科学院、各民主党派和全国性人民团体主管的期刊。地方性期刊是指省、自治区、直辖市各委、厅、局主管的期刊。”全国性期刊简称“国家级”,地方性期刊简称“地方级”。科学技术期刊只有这两个级别。有些单位在没有法律依据的条件下,将期刊划分为一级、二级、三级……,显然是不合理、不合法的。本刊是中国科学院主管的科学技术期刊,它与中国科学院…     

The ultrasonic transient field radiated by a normal shear wave probe

The ultrasonic transient field of horizontally polarized shear wave radiated by a 2/2 piezoelectric composite normal probe was analyzed. The analytic field solutions for two different surface force sources were deduced and the transient displacement field distribution on the central cross-section was plotted by numerical calculations. Direct wave and edge wave as well as head wave were observed distinctly in the plots. The experimental results of time domain waveform conformed with the theoretical predictions, which supported the theoretical and numerical results about the transient field of the transducer.     

酸度计(pH计)能测电导吗

990型ｐＨ 电导计在这方面就展示出其高超的本领 !该产品不但可以测量水溶液ｐＨ值和电导率 ,还可以测量温度和离子电极电位 (ｍＶ)值。辅以其它离子选择性电极可以测量各种离子活度。该产品除有高雅别致的外观设计外 ,还具有较高的自动化程度。例如 :能自动补偿温度影响误差 ,自动根据电导范围选择电导率量程和频率 ,并可自动换算 2 5℃时的电导率。电子触摸开关使状态选择轻而易举。交、直流供电同样适合现场和实验室使用。ｐＨ电极配有保养伴侣 ,不需活化。整个操作十分简单。配置铝合金工具箱 ,万向电极架更显气派。技术特征 :ｍＶ电导…