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Network Governance:a New Pattern of Public Affairs Administration

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学术界 2011年第2期 257-259页

作者： Sun Jian northwest Normal university

Based on the needs of complex practice of public administration,network governance theory is paid much attention to at home and abroad,and it will become the trend of dominant paradigm of public *** have finished a lot of research work about network management and practice with different perspectives,and achieved initial ***,as a new public administration pattern,governance network theory and related research need to do in-depth inquiry,and to improve gradually,although this should be a long,difficult and dynamic process of development.

关键词： network governance public affairs administration cooperative mechanism

Synthesis of Symmetric Diketones from Imidazolinium Salt and Bis-Grignard Reagents

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Chinese Chemical Letters 2000年第9期11卷 757-760页

作者： Zhen SHI Lin Gang LU Department of Chemistry, northwest university, Xi an 710069 Department of Chemistry Northwest University Xian 710069 China

The reaction of 2-substituted imidazolinium salt with bis-Grignard reagents is reported and a new method for the synthesis of symmetric diketones from carboxylic acids and bis-Grignard reagents is provided.

关键词： diketones imidazolinium salt bis-Grignard reagents synthesis

Acid-base behavior of cryptand 1, 4, 7, 10, 13, 16, 21, 24-octaaza-bicyclo [8, 8, 8] hexacosan-3, 8, 12, 17, 20, 25-hexone and complex formation

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Rare Metals 2002年第1期21卷 12-19页

作者： MO Zunli, CHEN Hong and GAO Jinzhang Institute of Chemistry, northwest Normal university, Lanzhou 730070, China Institute of Chemistry Northwest Normal University Lanzhou 730070

The bicyclic cryptand 1,4,7, 10,13,16,21, 24-octaaza-bigcyclo [8, 8,8] hexacosan-3, 8, 12, 17, 20, 25-hex-one (COBH) bearing diaminoethane groups along the eight-atom bridges was synthesized. The structure consists of discrete neutral macrobicyclic units; the two cycles share the two tertiary amine nitrogen atoms, which exhibit an endo-cndo conformation. Three identical branches formed by 1, 2-diaminoethane link the two tertiary amine groups. The protonation reactions of cryptand (COBH) and its complex formation with copper (II) were investigated by potentiometry in water and in a DMSO/water (80:20 in mass ratio) mixture as solvents. The cryptand acts as a his-base through its two N-bridgehead and exhibits a strong cooperativity that favors the first protonation and makes the second one difficult (△pK= 5.0). An inward rotation of the amide groups to form hydrogen bonds accounts for this cooperativity. The interaction of COBH with copper (II) leads to several binuclear complex proton contents.

关键词： COBH(cryptand 1,4,7, 10, 13, 16, 21, 24-octaaza-bigcyclo hexacosan -3, 8, 12, 17,20,25 - hex-one) macrobicyclic acid-base behavior complex formation proton contents

Synthesis of Cycloundecanone from Benzimidazole Methiodide Salt

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Chinese Chemical Letters 2000年第4期11卷 285-288页

作者： Zheng LI Zhen SHI (Department of Chemistry. northwest university, Xi’an 710069) Department of Chemistry Northwest University Xi'an 710069 China

The intra-molecular addition reaction of Grignard reagent with quaternary C=N bond of benzimidazole methiodide salt is reported, and a novel method for the synthesis of cycloundecanone is provided.

关键词： cycloundecanone benzimidazole methiodide salt synthesis

Invariant sets and solutions to the generalized thin film equation

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Science China Mathematics 2007年第6期50卷 875-886页

作者： Chang-zheng QU & Chun-rong ZHU Center for Nonlinear Studies, northwest university, Xi’an 710069, China Department of Mathematics, northwest university, Xi’an 710069, China Department of Mathematics, Anhui Normal university, Wuhu 241000, China Center for Nonlinear Studies Northwest University Xi’an China Department of Mathematics Northwest University Xi’an China Department of Mathematics Anhui Normal University Wuhu China

The invariant sets and the solutions of the 1+2-dimensional generalized thin film equation are discussed. It is shown that there exists a class of solutions to the equations, which are invariant with respect to the set E0 = {u : ux = vxF(u), uy = vyF(u)}, where v is a smooth function of variables x, y and F is a smooth function of u. This extends the results of Galaktionov (2001) and for the l+l-dimensional nonlinear evolution equations.

关键词： thin film equation invariant set invariant solution rotation group scaling group

A hybrid mean value related to the Dedekind sums and Kloosterman sums

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Science China Mathematics 2010年第9期53卷 2543-2550页

作者： ZHANG WenPeng & LIU YanNi Department of Mathematics,northwest university,Xi’an 710127,China Department of Mathematics Northwest University

The main purpose of this paper is using the properties of character sum and the analytic method to study a hybrid mean value problem related to the Dedekind sums and Kloosterman sums,and give some interesting mean val... 详细信息

关键词： Dedekind sum Kloosterman sums Hybrid mean value asymptotic formula identity

Determination of Kinetic Parameters and Metal Ions in Urea-Urease System Based on the Biochemical Reaction Heat Induced Laser Beam Deflection

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Chinese Chemical Letters 2000年第2期11卷 157-160页

作者： Hong Tao YAN Xiao Yun ZHU (Department of Chemistry, northwest university, Xian 710069) Department of Chemistry Northwest University Xian 710069 China

A new analytical method for the determination of urea-urease system based on biochemical reaction heat induced laser beam deflection is presented in this paper. With the method, the Michaelis constant (K-m) of urease and apparent inhibition constant (K-i) of some metal ion inhibitors were measured respectively. This method was also used for the quantitative determination of metal ions with satisfactory result.

关键词： urease kinetic parameter metal ions determination laser beam deflection

STUDIES　ON　THE　DETERMINATION　METHOD　OF　TRACE　ELEMENTS　IN　THE　FOSSIL　OF　DINOSAURIANEGG（Ⅰ）

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Chinese Chemical Letters 1996年第8期7卷 733-734页

作者： Hong Tao YAN and Sheng Ke YANG(Department of Chemistry, northwest university, Xi’an, 710069) Department of Chemistry Northwest University Xi'an 710069

A new method for the determination of trace iridium with catalytic theer thermallensing spectrometry was developed. The method has been applied to the determination ofthe trace iridium in the fossil of dinosaurian egg...

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ON THE GENERAL k-TH KLOOSTERMAN SUMS AND ITS FOURTH POWER MEAN

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Chinese Annals of Mathematics,Series B 2004年第1期25卷 97-102页

作者： LIUHONGYAN ZHANGWENPENG DepartmentofMathematics NorthwestUniversityXi＇an710069China DepartmentofMathematics NorthwestUniversityXi＇an710069China.

The main purpose of this paper is to study the asymptotic property of the fourth power mean of the general k-th Kloosterman sums, and give an interesting asymptotic formula.

关键词：广义k阶KLOOSTERMAN和幂平均渐近公式 Dirichlet特征