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research on the Attenuation Character of High-power Diode Laser Bar

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Research on the Attenuation Character of High-power Diode La...

Photonics Asia 2004;Optics and Lasers

作者： Jianjia Zhang Desheng Xin Li Xu Fangrong Hu state Key Lab of High-power Semiconductor laser, Changchun university of Science and Technology

The attenuation of diode laser bar depends on the level of productive art and working condition, and the devices which attenuate quickly appear higher junction temperature and asymmetry of heat distr

关键词： diode laser bar, attenuation character, electrical method instantaneous thermal resistance

Simulation-based optimization methods for caster operation under time confliction condition in steelmaking plant

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Simulation-based optimization methods for caster operation u...

2011 Chinese Control and Decision Conference（CCDC）

作者： Xiaochuan Luo,Chongzheng NA, are with Key laboratory of Integrated Automation of Process Industry,Ministry of Education,Northeastern university,110004 Shenyang,China Rujiu Liu

In steelmaking process,the process times of machines,such as LD Converter and Refinery *** often different with the process time of them in the schedule for the reason of Metallurgical Processes *** those process time change,caster operator must increase/decrease the speed of caster machine to prevent the shutdown of caster *** the same time,caster operator must also give the cooling water flow rates of cooling system according to the *** to now,caster operator sets the speed and flow rates by personal experience *** paper present a simulation-based methods for caster operation under time confiiction condition in steelmaking *** experiments illustrate the efficiency of the simulation-based methods.

关键词： Operation Optimization Continues caster steelmaking process

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基于移动代理的网络性能管理模型的研究

计算机工程与应用 2004年第7期40卷 6-9,87页

作者：陈志王汝传徐小龙南京邮电学院计算机科学与技术系南京210003

当前网络管理日益重要,性能管理作为网络管理的功能之一,需要使网络资源的使用达到最优化的程度,并保证网络提供可靠和连续的通信能力。基于移动代理的网络性能管理利用了移动代理分布式计算能力,能够根据不同的性能管理任务对网络进行... 详细信息

当前网络管理日益重要,性能管理作为网络管理的功能之一,需要使网络资源的使用达到最优化的程度,并保证网络提供可靠和连续的通信能力。基于移动代理的网络性能管理利用了移动代理分布式计算能力,能够根据不同的性能管理任务对网络进行高效、持续、实时和准确的性能管理。该文对其的构成、性能管理过程和特点等进行了详细的研究,并构建原型系统验证了该模型在网络性能管理中的优势。

关键词：移动代理网络管理性能管理

Paeoniflorin regulates G protein-coupled signalling pathways to control growth of hepatic stellate cells

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Paeoniflorin regulates G protein-coupled signalling pathways...

中国药理学会第十一次全国学术会议

作者： SUN Wu-yi,LI Rui,WANG Ling,SONG Yang,WEI Wei (Institute of Clinical Pharmacology,Anhui Medical university,Key laboratory of Anti-inflammatory and Immunopharmacology of Education Ministry,Anhui Engineering Technology research Center of Anti-inflammatory and Immunodrugs,Hefei 230032,China)

OBJECTIVE Hepatic stellate cells(HSC) play a critical role in development of liver fibrosis,since these cells are the principal cellular source of the excess collagen *** present study was designed to investigate the effects of paeoniflorin, a monoterpene glucoside,on the proliferation of hepatic stellate cells(HSC).Furthermore,the roles of G protein-coupled signalling and its key modulators G protein-coupled receptor kinases(GRK) in hepatic fibrosis were also investigated to further elucidate the anti-proliferation mechanism of *** HSC were cultured in platelet derived growth factor-BB(PDGF-BB) with or without different concentrations of *** proliferation of HSC was measured by MTT *** level of cAMP in HSC was determined by *** expression of G protein,GRK2 of HSC were detected by Western blot *** Paeoniflorin significantly inhibited the proliferation of HSC stimulated with *** expression of Gai-1 and Gai-2 were remarkably increased in HSC stimulated by PDGF-BB,but the expression of Gai-3 and Gas had no significant ***,the level of cAMP and the activity of PKA in HSC were obviously *** levels of Gai-1 and Gai-2 and decreased level of cAMP were restored with paeoniflorin *** role of GRK2,a key modulator of G protein-coupled signalling,in liver fibrosis was further investigated in this *** results showed that aggravation of hepatic fibrosis led to gradually decreasing expression of GRK2 in *** GRK2 inhibitor was given to decrease expression of GRK2,paeoniflorin remarkably increased the expression of GRK2 and decreased Gai-1,Gai-2 expression in membrane fractions of HSC stimulated with *** expression of Gas also had no significant change all *** Our findings suggest that the down-regulated expression of GRK2 in HSC correlates with hepatic *** had inhibitory effect on the proliferation of HSC,which d

关键词： liver fibrosis hepatic stellate cell G protein-coupled signalling paeoniflorin

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汽车制动防抱系统的混合建模与仿真研究

系统仿真学报 2004年第9期16卷 2059-2062页

作者：孙骏朱忠奎尹安东羊拯民同济大学上海200092 中国科学技术大学安徽合肥230026 合肥工业大学安徽合肥230069

在分析汽车制动防抱系统(ABS)工作特点的基础上,指出汽车ABS是由连续系统与离散系统组成的混合系统,进而提出基于有限状态机与Matlab/Simulink的ABS混合建模方法。利用混合建模方法建立了某轻型客车的ABS仿真模型并进行了低附着系数道... 详细信息

在分析汽车制动防抱系统(ABS)工作特点的基础上,指出汽车ABS是由连续系统与离散系统组成的混合系统,进而提出基于有限状态机与Matlab/Simulink的ABS混合建模方法。利用混合建模方法建立了某轻型客车的ABS仿真模型并进行了低附着系数道路条件下的仿真研究,探讨了制动器制动力、电磁阀响应时间和车轮转动惯量对汽车ABS性能的影响。仿真结果表明基于混合建模的ABS仿真系统能很好的模拟汽车ABS的性能;制动器制动力、电磁阀响应时间和车轮转动惯量对ABS制动性能影响的分析为ABS的设计提供了依据。

关键词：制动防抱系统有限状态机混合系统建模仿真

A numerical study of the wintertime double-warm-tongue structure in the Huanghai(Yellow) Sea

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Acta Oceanologica Sinica 2009年第4期28卷 8-15页

作者： SHAN Feng QIAO Fangli LU Xingang XIA Changshui College of Physical and Environmental Oceanography Ocean University of China Qingdao 266003 China First Institute of Oceanography State Oceanic Administration Qingdao 266061 China

Satellite remote sensing observations show that during winter, sea surface temperature （SST） presents the structure of double warm tongues in the Huanghai Sea trough： the western and the eastern warm tongues. Numerical experiments based on POM are carried out to study the forming mechanism of this thermal structure and its relation to the Huanghai Sea Warm Current （HSWC）. The control experiment reproduces this phenomenon quite well, and comparing experiments investigate the effect of wind and tide. It is found that the western warm tongue is mainly caused by the HSWC, which can be strengthened by wintertime southward wind. The eastern warm tongue develops under the influence of an anti-clockwise circulation which is induced by the temperature front of the Huanghai Sea Cold Water Mass （HSCWM） in summer and autumn. In the eastern portion of this circulation, the northward current carries warm water to the north, forming the eastern warm tongue, which remains till winter.

关键词： two-warm-tongue structure Huanghai Sea Warm Current Huanghai Sea Cold Water Mass POM

Real-Time Simulation for Electric PowerSteering Control System

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Real-Time Simulation for Electric PowerSteering Control Syst...

第二十四届中国控制会议

作者： Xiaoqun Chen~1, Xiang Chen~1, and Kemin Zhou~2 ~1Department of Electrical and Computer Engineering, university of Windsor, Windsor, Ontario, Canada N9B 3P4 ~2Department of Electrical and Computer Engineering, Louisiana state university, Baton Rouge, LA 70803-5901 U. S. A

In a competitive world, using real-time simulation rather than off-line simulation provides significant advantage for imitating system dynamics in a real world. In this paper, a real time simulation mechanism is presented for studying dynamics of electro-mechanical systems. The presented real-time simulation is conducted on a two-node computer platform engineered by RT-Lab, a software product of Opal-RT Technologies, Inc., as an illustrating example, for an electric power steering(EPS) control system model with CarSim. a software product of Mechanical Simulation Corporation for vehicle dynamics. The whole system simulation is operated in fixed-step real time and the simulation result is validated by its off-line simulation counterpart. It is pointed out that this real-time simulation set-up could be easily converted into a hardware-in-the-loop (HIL) simulation carrying real hardware such as a real steering motor and an electronic control unit, etc., when deemed as necessary.

关键词： Real-time simulation electro-mechanical system H~2 control electric power steering automotive control

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处理方式对紫红薯膳食纤维物化性能的影响

食品科技 2009年第9期34卷 104-107页

作者：吴少福上官新晨沈勇根江西农业大学食品科学与工程学院南昌330045 江西农业大学植物资源开发与利用研究室南昌330045

对酸、中温α-淀粉酶和耐高温α-淀粉酶等3种方式制得的紫红薯膳食纤维进行了膨胀力、持水力和阳离子交换能力的试验。结果表明:100℃时3种样品的膨胀力和持水力达到最大值,中温α-淀粉酶处理的样品的膨胀力和持水力优于其他样品;3种样... 详细信息

对酸、中温α-淀粉酶和耐高温α-淀粉酶等3种方式制得的紫红薯膳食纤维进行了膨胀力、持水力和阳离子交换能力的试验。结果表明:100℃时3种样品的膨胀力和持水力达到最大值,中温α-淀粉酶处理的样品的膨胀力和持水力优于其他样品;3种样品都具有一定的阳离子交换能力,酸处理的样品优于其他2种样品。

关键词：膳食纤维紫红薯膨胀力持水力阳离子交换能力

Relationship between the exposure dose of high intensity focused ultrasound and the heated necrosis element

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Progress in Natural Science:Materials International 2004年第8期 62-64页

作者： FENG Ruo 1,2 *, ZHANG Qiang 1, LI Faqi 2, ZHENG Xiaozheng 1, BAI Jin 2, XU Jianyi 1, WANG Yaojun 1 and WANG Zhibiao 2(1. state Key laboratory of Modern Acoustics, Institute of Acoustics, Nanjing university, Nanjing 210093, China 2. Institute of Ultrasonic Engineering in Medicine, Chongqing university of Medical Science, Chongqing 400016, China) state Key laboratory of Modern Acoustics，Institute of Acoustics，Nanjing university，Nanjing 210093，China Institute of Ultrasonic Engineering in Medicine，Chongqing university of Medical Science，Chongqing 400016，China state Key laboratory of Modern Acoustics，Institute of Acoustics，Nanjing university，Nanjing 210093，China Institute of Ultrasonic Engineering in Medicine，Chongqing university of Medical Science，Chongqing 400016，China

Heated necrosis element of tissues is the basis for treating tumor by high intensity focused ultrasound (HIFU), so study on the relationship between the HIFU exposure dose and the heated necrosis element of tissues is of great significance for both HIFU clinical applications and basic research. Using Pennes and Rayleigh formulae the relationship between the exposure dose of an annular focused transducer and the heated necrosis element (i.e. biological focused region) in a bovine liver in vitro at a depth of 2 cm is simulated in an exposure dose range with radiation sound intensity of 7000～25400 W/cm 2 and exposure time of 0～20 s. The theoretical results appear to be in quite good agreement with the experimental ones. It is shown that on the basis of existing theories the heated necrosis element produced by HIFU exposure can be predicted. The deviation of the theory from the experiments under higher exposure dose has also been discussed.

关键词： high intensity focused ultrasound (HIFU) heated necrosis element biological focused region dosage of HIFU.