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Theoretical study of dynamical properties on reaction path.in molecular internal coordinates

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Science China Chemistry 1999年第6期42卷 605-611页

作者：李宗和徐红许贤忠曹晓燕刘若庄 1. Department of Chemistry Beijing Normal University 100875 Beijing China

The dynamical properties on reaction path.(IRC) in internal coordinates have been obtained, which includeωK(frequencies orthogonal to IRC), LK(vibrational modes),BKF(coupling constants between the IRC and vibrations orthogonal to it), BKL, (coupling constants between every two vibrations orthogonal to IRC). A set of theory of reaction path.in molecular intemal coordinates has been also constructed. The dynamical properties, includingωK,BKF,BKL of the reaction H1O2H3+H4→H1O2+H3H4 have been calculated, which explicitly explain the interaction, changing trend and contribution of each chemical bond (including bond angle) in the reaction.

关键词： molecular internal coordinates reaction path.

Unusual high-density and saline aqueous inclusions in ultrahigh pressure metamor- phic rocks from Sulu terrane in eastern China

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Chinese Science Bulletin 2003年第18期48卷 2018-2023页

作者： SHEN Kun ZHANG Zeming A.M.van den Kerkhof XIAO Yilin XU Zhiqin J.Hoefs Institute of Geological Sciences of Shandong Jinan 250013China Institute of Geology CAGSBeijing 100037China Geoscience Center University GttingenGttingen 37077Germany

Primary high-density fluid inclusions were identified in garnet from ultrahigh pressure eclogite in the southern part of the Sulu terrane. They occur isolatedly or in cluster together with relatively low-density two-phase inclu-sions. The eutectic temperature of the inclusions is as low as ≤ -52℃. A bubble was nucleated in a liquid inclusion dur-ing the specific stage of cyclic cooling-heating runs, and the liquid-gas homogenization temperature was measured to be ≤-12.5℃. The composition of the inclusions modeled by the system CaCl2-NaCl-H2O, yields the fluid density of 1.27g/cm3 that corresponds to a pressure of ca. 2.4 GPa at thetemperature of peak eclogite-facies metamorphism, close tothe ultrahigh pressure metamorphic conditions. During theexhumation of the eclogite the inclusions reacted with thehost mineral, forming hydrous silicate minerals that resulted in lowering of the fluid density and its transformation to multi-phase inclusions.

关键词： ultrahigh pressure eclogite fluid inclusion microther-mometry isochore P-T path.

TOPOLOGICAL CONDITIONS FOR FAULT DIAGNOSABILITY AT SUBNETWORK-LEVEL

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Science China Mathematics 1992年第9期35卷 1117-1125页

作者：黄东泉叶风杨祖樱 Department of Electrical Engineering Fuzhou University Fuzhou 350002 PRC

The fault analysis of analog circuits at subnetwork-level is confronted with two essentialcore problems: (ⅰ) Is it necessary that all the torn nodes are accessible? (ⅱ) Are there any topological conditions of subnetwork which guarantee the fault at subnetwork-level to bediagnosed correctly? This paper answers the two problems in two theorems. The conditions are necessary and almost sufficient, and if all the torn nodes are accessible, the required topological conditions can be almost satisfied automatically. This is a special situation of our research on the distribution of the accessible nodes.

关键词： fault at subnetwork-level diagnosability independent path.

ON THE NUMBER OF INCREASING path. IN LABELED CYCLES AND STARS

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Applied Mathematics(A Journal of Chinese Universities) 2007年第1期22卷 1-6页

作者： Chen Lei Lü Changhong Ye Yongsheng Department of Mathematics East China Normal University Shanghai 200062 China Institute of Theoretical Computing East China Normal University Shanghai 200062 China Department of Mathematics Huaibei Coal Industry Teachers College Huaibei 235000 China

A labeled graph is an ordered pair （G, L） consisting of a graph G and its labeling L ： V（G） → {1,2 ,n}, where n = ｜V（G）｜. An increasing nonconsecutive path.in a labeled graph （G,L） is either a path.（u1,u2 uk）（k ≥ 2） in G such that L（u,）＋ 2 ≤ L（ui＋1） for all i = 1, 2, ..., k- 1 or a path.of order 1. The total number of increasing nonconsecutive path. in （G, L） is denoted by d（G, L）. A labeling L is optimal if the labeling L produces the largest d（G, L）. In this paper, a method simpler than that in Zverovich （2004） to obtain the optimal labeling of path.is given. The optimal labeling of other special graphs such as cycles and stars is obtained.

关键词： labeled graph cycle path.

ON THE NEAR-TIP FIELDS FOR A CRACK DYNAMICALLY GROWING ALONG A CURVED path.IN AN ELASTIC SOLID

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Chinese Science Bulletin 1990年第14期35卷 1177-1181页

作者：靳志和 Institute of Engineering Mechanics Northem Jiaotong University Beijing 100044 PRC

Ⅰ. INTRODUCTIONGreat attention has been paid in recent years to the investigations of dynamic growth of cracks in elastic solids under mixed mode loading conditions due to the practical importance. A crack usually propagates along a curved path.under mixed mode loading. Freund and Clifton showed that the near-tip singular stress field for growing cracks has universal spatial dependence in a local Cartesian coordinate system(x, y)centered at the moving crack tip in such a way that the crack tip velocity vector is in

关键词： crack-tip field dynamic growth curved path.

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Spaghetti

小学生时代（大嘴英语） 2022年第10期 35-35页

作者： Jane Dippold(文/图) 不详

Eddie loves his aunts Mia,Vita and *** only one of their spaghetti is his *** one?Try to find the perfect path.

关键词： perfect Vita path.