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NUMERICAL SIMULATION OF NANOPARTICLE COAGULATION IN A POISEUILLE FLOW VIA A MOMENT METHOD

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Journal of Hydrodynamics 2008年第1期20卷 1-9页

作者： liu Song lin jian-zhong State Key Laboratory of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China China Jiiiang University Hangzhou 310018 China

Numerical simulations of coagulating nano-scale aerosols in a two dimensional Poiseuille flow between fixed plates are performed. Evolution of the particle field is obtained by utilizing a moment method to approximate the aerosol general dynamic equation. A moment method is used, which assumes a lognormal function for the particle size distribution and requires knowledge of the first three moments. A Damk？hler number is defined to represent the ratio of the convection time scale to the coagulation time scale. Simulations are performed based on three Reynolds numbers, 100, 500 and 1000, and on three initial particle volume fractions corresponding to Damk？hler numbers 0.1, 0.2 and 1.0. Spatio-temporal evolution of the first three moments along with the geometric mean volume and standard deviation are discussed.

关键词： nanoparticle Coagulation moment method Poiseuille flow

Stiction of a Nano-Beam with Surface Effect

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Chinese Physics Letters 2011年第11期28卷 186-189页

作者： liu jian-lin XIA Re ZHOU Yue-Ting Department of Engineering Mechanics China University of PetroleumQingdao 266555 Key Laboratory of Transients in Hydraulic Machinery Ministry of EducationWuhan 430072 School of Mechanical Engineering Yonsei UniversitySeoul 120-749Republic of Korea

Nanowire stiction is a crucial bottleneck for the development of M/NEMS *** present a model of a nano-beam stuck to the substrate in consideration of both surface elasticity and residual surface *** critical detachment length can be derived from the transversality condition using the variational *** effects of the surface parameters on the adhesion of the nano-beam are discussed in *** analyses provide some suggestions for engineers in the design and fabrication of more accurate M/NEMS instruments.

关键词： elasticity beam surface

Optimization Design and Finite Element Analysis of Core Cutter

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Journal of China University of Mining and Technology 2007年第3期17卷 399-402页

作者： CAO Pin-lu YIN Kun PENG jian-ming liu jian-lin College of Construction Engineering Jilin University Changchun Jilin 130026 China Key Laboratory of Geo-exploration Instrumentation Ministry of Eduction Changchun Jilin 130026 China

The hydro-hammer sampler is a new type of sampler compared with traditional ones. An important part of this new offshore sampler is that the structure of the core cutter has a significant effect on penetration and core recovery. In our experiments, a commercial finite element code with a capability of simulating large-strain frictional contact between two or more solid bodies is used to simulate the core cutter-soil interaction. The effects of the cutting edge shape, the diameter and the edge angle on penetration are analyzed by non-liner transient dynamic analysis using a finite element method （FEM）. Simulation results show that the cutter shape clearly has an effect on the penetration and core recovery. In addition, the penetration of the sampler increases with an increase in the inside diameter of the cutter, but decreases with an increase in the cutting angle. Based on these analyses, an optimum structure of the core cutter is designed and tested in the north margin of the Dalian gulf. Experiment results show that the penetration rate is about 16.5 m/h in silty clay and 15.4 m/h in cohesive clay, while the recovery is 68% and 83.3% resoectively.

关键词： hydro-hammer sampler finite element analysis core cutter-soil interaction optimum design

Formation of Struvite Crystals in a Simulated Food Waste Aerobic Composting Process

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Chemical Research in Chinese Universities 2010年第2期26卷 210-216页

作者： DU Xian-yuan liu jian-lin HUANG Guo-he LI YU Energy and Environmental Research Centre North China Electric Power University Beo＇ing 102206 P. R. China College of Environment and Resources Jilin University Changchun 130012 P. R. China Environmental Systems Engineering Program Faculty of Engineering University of Regina Regina SK S4S OA2 Canada

Bench-scale treatments with three mixtures of Mg and P salts, including K3PO4＋MgSO4, K2HPO4＋MgSO4, and KH2PO4＋MgSO4 as additives in a simulated food waste aerobic composting process, were conducted to test the magnesium ammonium phosphate（MAP） formation, and the compost products were analyzed by X-ray diffraction（XRD）, Scanning electron microscopy（SEM）, and Energy dispersive X-ray spectroscopy（EDS） analyses. The comparison results between XRD, SEM, and EDS analyses of MAPs in the dried compost and synthesized MAPs confirm the formation of MAP crystals in the simulated food waste aerobic composting process. The analysis of the compost also indicates that the addition of all the three mixtures of Mg and P salts in the aerobic composting process can increase nitrogen conservation and decrease nitrogen loss because of the formation of MAPs. The mechanism of MAP formation was verified as the reaction of ammonium（NH4＋） with magnesium（Mg^2＋） and phosphate[HnPO4^（3-n） , n=0, 1, and 2）.

关键词： Phosphate Magnesium sulphate Magnesium ammonium phosphate Food waste treatment Aerobic composting

Interactive Decision Support Algorithm and Its Application

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Journal of Systems Science and Systems Engineering 2001年第4期13卷 475-480页

作者： HONG Xiao-kang, liu jian-lin, XIE jian-cang, liu Fu-chao, MA Bin Xi’an University of Technology, Xi’an 710048, China Xi'an University of Technology Xi'an 710048 China

On the bases of the properties of abstract hierarchical structure model and the concrete structure of the mode1 system. which is convenient to solve practical problems, a visual interactive hierarchical coordination method has been proposed. In this paper, a compensation adjustment sub-mode1 for hydropower stations, an optimal operation sub-model for hydro-thermal power systems, and an aggregation model based on the aspiration level theory are built, and these models can be solved with decision support algorithm. The set of objectives and its structure could be made by the decision-maker in visua1 software, which could be decided by AHP. Finally, the application results show that this methodology is feasible, however, the software (DSS) needs further improvement.

关键词： interactive decision support a1gorithm mu1ti-objective and multi-mode1 structurel hydro- thermal power system scheme of power production

MOLECULAR BEAM STUDIES ON ADSORPTION-DESORPTION KINETICS OF CO AND H_2 ON Ni SURFACE

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Chinese Chemical Letters 1993年第11期4卷 965-968页

作者： Guang Kang XI jian liu Sheng lin LI Tian Xi HE Department of Electron Science, Nankai University, Tianjin 300071

Adsorption-desorption kinetics of CO and H_2 on Ni surface were studied with molecular beam relaxation spectrometry. It is found that there are two adsorbed states in the substrate temperature range 330K 详细信息

关键词： MOLECULAR BEAM STUDIES ON ADSORPTION-DESORPTION KINETICS OF CO AND H2 ON Ni SURFACE high CO Ni

A follow-up study on newer anti-epileptic drugs as add-on and monotherapy for partial epilepsy in China

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Chinese Medical Journal 2012年第4期125卷 646-651页

作者： Kang Hui-cong Hu Qi liu Xiao-yan liu Zhi-guang Zeng Zheng liu jian-lin Wang Min Liang Yan-ling Zhu Sui-qiang Huazhong Univ Sci & Technol Tongji Hosp Dept Neurol Wuhan 430030 Hubei Peoples R China

Background Recently,new anti-epileptic drugs （AEDs） have been more frequently selected to treat *** the present study,we evaluated the dynamic changes of efficacy and safety of three newer AEDs for treating partial epilepsy in *** Patients were collected sequentially and were divided into three groups which accepted oxcarbazepine （OXC）,lamotrigine （LTG） or topiramate （TPM） *** group included monotherapy and add-on therapy *** followed all patients for one year and recorded the indexes of efficacy and safety in *** A total of 909 patients finished the follow-up *** significant difference was found in proportion of patients with 〉 or =50% reduction,〉 or =75% reduction and 100% seizure reduction in the LTG and OXC groups between the first and the second six *** the TPM group there was a statistical difference between the first and the second six months in proportion of patients with 〉 or =50% reduction （P=-0.002）,〉 or =75% reduction （P 〈0.0001） and 100% seizure reduction （P=0.009） in the monotherapy subgroup,and about 〉 or =75% reduction and 100% seizure reduction in the add-on therapy subgroup （P 〈0.0001）.The efficacy between the add-on and monotherapy subgroups showed a statistical *** safety of the three newer AEDs was *** The three newer AEDs all showed good efficacy and tolerability for partial *** the efficacy can be maintained for at least one year.

关键词： new anti-epileptic drug partial epilepsy efficacy safety monotherapy add-on therapy

分散液液微萃取-柱前衍生-高效液相色谱法测定水样中双酚A

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分析化学 2009年第10期37卷 1484-1488页

作者：李鱼刘建林翦英红华北电力大学能源与环境研究中心吉林大学环境与资源学院

建立了分散液液微萃取-柱前衍生-高效液相色谱法测定水样中双酚A的分析方法。通过交互正交试验和混合型优化实验设计对影响因素(萃取剂体积、分散剂类型及其体积、水样体积、pH值及离子强度)进行了优化。优化后的分散液液微萃取条件为:6... 详细信息

建立了分散液液微萃取-柱前衍生-高效液相色谱法测定水样中双酚A的分析方法。通过交互正交试验和混合型优化实验设计对影响因素(萃取剂体积、分散剂类型及其体积、水样体积、pH值及离子强度)进行了优化。优化后的分散液液微萃取条件为:60μL萃取剂,0.4mL分散剂(甲醇),pH4.0;优化后的柱前衍生化条件:0.1mL2.0g/L衍生剂(对硝基苯甲酰氯)、衍生化时间30min;方法的线性范围:0.002～0.2mg/L(r=0.9997),检出限0.007μg/L(S/N=3);不同浓度双酚A的萃取率为59.0%～63.0%,相对标准偏差(RSD)2.5%～9.2%(n=5);水样中双酚A的加标率为86.5%～107.1%,RSD为4.0%～11.9%(n=5),其它雌激素(雌酮、雌二醇、雌三醇和17α-乙炔基雌二醇)对双酚A的测定无干扰。本方法可以对水环境中的痕量BPA进行检测,具有操作简便、快速等优点。

关键词：分散液液微萃取柱前衍生高效液相色谱双酚A

波罗的海运价指数与样本航线期租的协整关系研究

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数理统计与管理 2006年第3期25卷 293-296页

作者：刘建林上海海事大学交通运输学院上海200135

波罗的海运价指数BD I是综合反应干散货航运市场运价总水平的指标,在众多的运价指数中占有公认的主导地位。本文以BD I运价指数为研究对象,通过协整研究,证明了BD I运价指数与BC I4条样本航线期租价格之间稳定的联动关系,并且给出了它... 详细信息

波罗的海运价指数BD I是综合反应干散货航运市场运价总水平的指标,在众多的运价指数中占有公认的主导地位。本文以BD I运价指数为研究对象,通过协整研究,证明了BD I运价指数与BC I4条样本航线期租价格之间稳定的联动关系,并且给出了它们的误差修正模型。

关键词：运价指数协整误差修正模型期租