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Science China(Technological Sciences) 2016年第2期59卷 330-336页

作者： ren ZhiJun ZHANG lin SHI Yue College of Aerospace and Civil Engineering Harbin Engineering University College of Power and Energy Engineering Harbin Engineering University

This work aimed to study the inactivate kinetics of Staphylococcus aureus （S. aureus） in artificial seawater by ultraviolet radi- ation, establish relationships between model parameters and growth phases, and explain the mechanization of UV disinfection by molecular biological detection. Investigations were carried out for the validation of Chick-Watson, Collins-Selleck, Horn and Biphasic models when S. aureus was in stationary phase （t=14 h）. The results showed that the Biphasic kinetic model＇s R2 turned out to be the highest one （R2=0.9892） and RMSE was less than 0.5 （RMSE =0.2699）. The Biphasic kinetic model was better fit for ultraviolet disinfection than the other three models under the circumstance of this experiment and chosen to fit the ultraviolet disinfection curves for microorganisms at three growth phases. The sensitivity of microorganisms under ultraviolet radiation was in the following order： in exponential phase 〉 in stationary phase 〉 in lag phase by comparing the indexes of the Biphasic model （kl and x）. Besides, agarose gel electrophoresis was used in order to directly assess the damage to DNA of mi- croorganisms that were exposed to the different dose of UV irradiation. The results revealed that DNA damage caused by UV radiation was an important reason for the microorganism inactivation and as the UV dose increased, there was greater damage caused in DNA.

关键词： UV disinfection kinetics growth phases Biphasic models DNA damage

A New (2+1)-Dimensional Integrable Equation

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Communications in Theoretical Physics 2009年第1期51卷 13-16页

作者： ren Bo lin Ji Institute of Nonlinear Physics Zhejiang Normal University Jinhua 321004 China Abdus Salam International Centre for Theoretical Physics Trieste 34139 Italy

A new nonlinear partial differential equation （PDE） in 2＋1 dimensions is obtained from the mKP equation by means of an asymptotically exact reduction method based on Fourier expansion and spatio-temporal resealing. In order to demonstrate integrability property of the new equation, the corresponding Lax pair is obtained by applying the reduction technique to the Lax pair of the mKP equation.

关键词： mKP equation asymptotically exact reduction method Lax pair

Modeling of friction stir welding process for tools design

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Frontiers of Materials Science 2011年第2期5卷 236-245页

作者： san-Bao lin Yan-Hua ZHAO Zi-Qiu HE lin WU State Key Lab of Advanced Welding Production Technology Harbin Institute of Technology Harbin 150001 China

A three-dimensional friction stir welding （FSW） process model has been developed based on fluid mechanics. The material transport in the welding process has been regarded as a laminar, viscous, and non-Newtonian liquid that flows past a rotating pin. A criterion to divide the weld zone has been given on the basis of cooperation of velocity field and viscosity field. That is, the η0-easy-flow zone that existed near the tool pin corresponded to the weld nugget zone; the area between the η0-easy-flow zone and η1-viscosity band is corresponded to the thermal-mechanical affected zone （TMAZ）. The model gives some useful information to improve the understanding of material flow in FSW through the simulation result of velocity distribution. In order to appraise the friction stir pin design, three kinds of pin geometry, one is column pin, the second is taper pin, and the last one is screw threaded taper pin, were used in the model. The pin geometry seriously affected the simulation result of velocity distribution in the η0-easy-flow zone. The velocity distribution in the η0-easy-flow zone can be considered as the criterion of optimizing friction stir tool design. This study will benefit to direct the friction stir tool design.

关键词： friction stir welding (FSM) 2014Al alloy, model, flow, fdction stir pin

Enhanced adsorption of phosphate by loading nanosized ferric oxyhydroxide on anion resin

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Frontiers of Environmental Science & Engineering 2014年第4期8卷 531-538页

作者： Jing ren Nan LI lin ZHAO Nanqi ren School of Environmental Science and Engineering Tianjin University Tianjin 300072 China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin 150090 China

Ferric oxyhydroxide loaded anion exchanger （FOAE） hybrid adsorbent was prepared by loading nanosized ferric oxyhydroxide （FO） on anion exchanger resin for the removal of phosphate from wastewater. TEM and XRD analysis confirmed the existence of FO on FOAE. After FO loading, the adsorption capacity of the hybrid adsorbent increased from 38.70 to 51.52mg.g-1. Adsorption processes for both FOAE and anion resin were better fit to the pseudo first order model. Batch adsorption experiments revealed that higher temperature （313K）, higher initial phosphate concentration （50 mg.L-1） and lower solution pH （pH value of 2） would be more propitious to phosphate adsorption. Competition effect of coexisting anions on phosphate removal can be concluded as sulfate 〉 nitrate 〉 chloride. Freundlich isotherm model can describe the adsorption of phosphate on FOAE more accurately, which indicated the heterogeneous adsorption occurred on the inner-surface of FOAE.

关键词： phosphate removal adsorption nanosized ferric oxyhydroxide anion exchanger

Evaluation of the Protective Efficacy of a Fused OmpK/Omp22 Protein Vaccine Candidate against Acinetobacter baumannii Infection in Mice

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Biomedical and Environmental Sciences 2018年第2期31卷 155-158页

作者： GUO san Jun ren Shan XIE Yong En The Research Institute of Immunology and Molecular Biology North Sichuan Medical College

Acinetobocter baumannfi （A. Baumannii） is an emerging opportunistic pathogen responsible for hospital-acquired infections, and which now constitutes a sufficiently serious threat to public health to necessitate the development of an effective vaccine. In this study, a recombinant fused protein named OmpK/Omp22 and two individual proteins OmpK and Omp22 were obtained using recombinant expression and Ni-affinity purification. Groups of BALB/c mice were immunized with these proteins and challenged with a clinically isolated strain of A. boumonnii. The bacterial load in the blood, pathological changes in the lung tissue and survival rates after challenge were evaluated. Mice immunized with OmpK/Omp22 fused protein provided significantly greater protection against A. boumonnfi challenge than those immunized with either of the two proteins individually. The results provide novel clues for future design of vaccines against A. boumonnii.

关键词： Evaluation of the Protective Efficacy of a Fused OmpK/Omp22 Protein Vaccine Candidate against Acinetobacter baumannii Infection in Mice

Effect of dew point on hot-dip galvanizing behavior of a high-manganese TWIP steel for automotive application

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Journal of Iron and Steel Research International 2020年第10期27卷 1200-1211页

作者： Ting-dong ren Wen Shi ren-dong Liu Li lin Hong-gang Yang lin Li Babar Shahzad School of Materials Science and Engineering Shanghai UniversityShanghai 200072China Ansteel Group Co. Anshan 114021LiaoningChina Institute of Metal Research Chinese Academy of SciencesShenyang 110016LiaoningChina

The effect of dew points(-50,-l0 and+10℃)on the galvanizing properties of a high-manganese twinning-inducedplasticity(TWIP)steel was *** electron microscopy(SEM),glow discharge optical emission spectrometry(GDOES)and X-ray photoelectron spectroscopy(XPS)were used for microscopic observation and qualitative analysis of the interfacial layer between the steel surface and the zinc layer after hot-dip *** analysis results show thatthree diffcrent morphologies of metallic oxides are formed on the interfacial layer under the different dew *** results show that Al is present in the molten zinc,reacting with Fe on the steel surface to form Fe2Al5,which can increasethe galvanizing *** results show that the valence states of Mn in the interfacial alloy layer are Mn'*and Mn*+,and the valence stales of Fe are Fe^0,Fe^2+and Fe^3+.The experimental results show that the hot-dip galvanizing performanceis the best at-10℃ and the formation of Mn and Fe intermetallic oxides has a bad effect on hot-dip galvanizing behaviorof the high-manganese TWIP *** types of the formed surface oxides(MnO,Mn3O4,Mn2O3,FeO3,and Fe2MnO4)onthe surface of the steel sheet are *** can obtain the best hot-dip galvanizing performance of the high-manganese TWIP steel by controlling the dew point from-10 to-5℃.

关键词： High-manganese twinning-induced plasticity steel-Hot-dip galvanizing Dew point-Glow discharge optical emission spectrometry X-ray photoelectron spectroscopy Surface oxide

Rural Development Transformation and Social Governance from the Perspective of Specialization:A Case Study of Ruiling Village in Guangzhou City,China

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Chinese Geographical Science 2023年第5期33卷 796-812页

作者： lin Yuancheng YANG ren LI Simeng School of Geography and Planning Sun Yat-sen UniversityGuangzhou 510006China Land Research Center Sun Yat-sen UniversityGuangzhou 510275China

The reorganization of the global production network and the increased mobility of urban-rural elements have accelerated the differentiation of rural spaces,resulting in a trend towards specialization in rural *** paper focuses on the concept of specialization,and takes a renowned bonsai specialized village in Guangzhou City,China as a typical case to explore its transformation and development process,action logic and coupling mechanism with the social *** results show that:1)the development of rural specialization in Ruiling Village is shaped by several key actors,such as local governments,grassroots organizations,villagers,social organizations,policies,markets and *** transfer of these key actors and the reconstruction of actor-networks in different stages have an important influence on the transformation and realization of rural development goals.2)Through subjects-driven,organization management and resource connection,social governance supports the specialization of rural industrial organization,operation,technology and *** governance structure shifts from decentralization to networking,refinement and integration.A coupling community of social governance and specialization is created by the social governance system of‘local government-grassroots organizationseconomic cooperatives-villagers’,which links industries,industrial chains and cooperatives.3)Social governance integrates into the value chain extension process of rural specialized development with a central,multi-level organizational *** promotes the construction of the whole value chain through organizational planning,resource integration and image shaping,thus realizing the value,branding and organization of the industry,as well as the integration of rural sustainable development and governance *** governance has a profound impact on the development of rural specialization in terms of subject,structure and mode,and participates in the constructio

关键词： rural specialization rural development transformation social governance rural differentiation actor-network theory(ANT) Ruiling Village

Photochromism of Hexatungstic Acid in DMF

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Chemical Research in Chinese Universities 1995年第3期11卷 264-265页

作者： Yue, Bin lin, Xin-rong Zhu, Si-san FUDAN UNIV DEPT CHEMSHANGHAI 200433PEOPLES R CHINA

ＰｈｏｔｏｃｈｒｏｍｉｓｍｏｆＨｅｘａｔｕｎｇｓｔｉｃＡｃｉｄｉｎＤＭＦＹＵＥＢｉｎ，ＬＩＮＸｉｎ－ｒｏｎｇａｎｄＺＨＵＳｉ－ｓａｎ（ＤｅｐａｒｔｎｉｅｉｉｔｏｆＣｈｅｍｉｓｔｒｙ，ＦｕｄａｎＵｎｉｖｅｒｓｉｔｙ，Ｓ... 详细信息

ＰｈｏｔｏｃｈｒｏｍｉｓｍｏｆＨｅｘａｔｕｎｇｓｔｉｃＡｃｉｄｉｎＤＭＦＹＵＥＢｉｎ，ＬＩＮＸｉｎ－ｒｏｎｇａｎｄＺＨＵＳｉ－ｓａｎ（ＤｅｐａｒｔｎｉｅｉｉｔｏｆＣｈｅｍｉｓｔｒｙ，ＦｕｄａｎＵｎｉｖｅｒｓｉｔｙ，Ｓｈａｎｇｈａｉ，２００４３３）（Ｒ...

关键词： Hexatungstic acid Photochromism Reduction

STATIC SHAPE CONTROL OF LAMINATED PLATE CONTAINING PIEZOELECTRIC PATCHES

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Acta Mechanica Solida Sinica 1998年第2期11卷 113-122页

作者： lin Xiqiang ren Junguo Natl Univ Def Technol Dept Astronaut Changsha 410073 Peoples R China

By applying the Heaviside function, the equations governinglaminated plates possess- ing spatially distributed piezoelectricpatches have been established. Based on these equations, static shapecontrol of laminated plates is discussed. BY using a genetic andcollocation algorithm, the opti- mal locations and scales of thesepiezoelectric patches have been selected. Numerical examples are pre-sented to illustrate the efficiency of the algorithm and thepiezoelectric actuators.

关键词： laminated plate piezoelectric material shape control

A multi-objective optimization based on machine learning for dimension precision of wax pattern in turbine blade manufacturing

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Advances in Manufacturing 2024年第3期12卷 428-446页

作者： Jing Dai Song-Zhe Xu Chao-Yue Chen Tao Hu san-san Shuai Wei-Dong Xuan Jiang Wang Zhong-Ming ren State Key Laboratory of Advanced Special Steels School of Materials Science and EngineeringShanghai UniversityShanghai200444People’s Republic of China

Wax pattern fabrication in the investment casting of hollow turbine blades directly determines the dimension accuracy of subsequent casting,and therefore significantly affects the quality of final *** this work,we develop a machine learning-based multi-objective optimization framework for improving dimension accuracy of wax pattern by optimizing its process *** consider two optimization objectives on the dimension of wax pattern,i.e.,the surface warpage and core *** active learning of Bayesian optimization is employed in data sampling to determine process parameters,and a validated numerical model of injection molding is used to compute objective results of dimension under varied process *** collected dataset is then leveraged to train different machine learning models,and it turns out that the Gaussian process regression model performs best in prediction accuracy,which is then used as the surrogate model in the optimization framework.A genetic algorithm is employed to produce a non-dominated Pareto front using the surrogate model in searching,followed by an entropy weight method to select the most optimal solution from the Pareto *** optimized set of process parameters is then compared to empirical parameters obtained from previous trial-and-error experiments,and it turns out that the maximum and average warpage results of the optimized solution decrease 26.0%and 20.2%,and the maximum and average errors of wall thickness compared to standard part decrease from 0.22 mm and 0.0517 mm using empirical parameters to 0.10 mm and 0.0356 mm using optimized parameters,*** framework is demonstrated capable of addressing the challenge of dimension control arising in the wax pattern production,and it can be reliably deployed in varied types of turbine blades to significantly reduce the manufacturing cost of turbine blades.

关键词： Hollow turbine blade Wax pattern fabrication Dimension control Multi-objective optimization Machine learning Numerical simulation