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Establishment of Optimal Blade Clearance of Stainless Steel Rolling-Cut Shear and Test of Shearing Force Parameters

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Journal of Iron and Steel Research International 2012年第9期19卷 52-61页

作者： MA Li-feng 1 , 2 , HUANG Qing-xue 1 , HUANG Zhi-quan 1 , CHU Zhi-bing 1 , TIAN Ya-qin 1 ( 1.college of material science and engineering , Taiyuan university of science and Technology , Taiyuan 030024 , Shanxi , china 2.Superplastic and Plastic Research Institute , Jilin university , Changchun 130025 , Jilin , china ) [a] college of material science and engineering Taiyuan University of Science and Technology Taiyuan 030024 Shanxi China [b] Superplastic and Plastic Research Institute Jilin University Changchun 130025 Jilin China

The purpose aims to improve the plate shearing section quality and metal yield by means of optimal blade clearance adjustment model of rolling-cut shear and accurate calculation of the maximum shearing force , as well as for the system optimization design , structure optimization design to provide important basis.A 3 500mm rolling shear of a large stainless steel factory was taken as the test object , and the blade clearance under different influence factors of the clearance value and the shearing section were *** optimized production accumulated data regression analysis and the rolling shear process of stainless steel shear *** test results show that the optimal blade clearance adjustment module is a comprehensive function , which include steel plate thickness , material , temperature and shear plate *** shear stress at starting stage with the relative penetration depth increases affected by the above factors , and the fracture peak decreases rapidly after being cut into the roll phase constant.

关键词： stainless steel rolling-cut shear blade clearance shearing force industrial test

Characterzation and separation of Al_(13) species using gel-filtration chromatography

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science china Chemistry 2006年第4期49卷 326-331页

作者： CHU Yongbao1,2, GAO Baoyu1, YUE Qinyan1, WANG Yan1 & WANG Shuguang1 1. School of Environmental science and engineering, Shandong university, Jinan 250100, china 2. college of material and Environment, Qingdao university of science and Technology, Qingdao 266042, china School of Environmental science and engineering Shandong University Jinan China college of material and Environment Qingdao University of Science and Technology Qingdao China

A polyaluminum chloride (PAC) sample was prepared using a slow alkalinetitration method. The Bio-Gel P-100 gel column chromatographic technique was used to separate andcharacterize the various forms of aluminum present in the prepared PAC solution. The effluents froma gel column were monitored using online chemical method: AI-Ferron timed complexationspectropho-tometry and by ^(27)Al nuclear magnetic resonance (NMR) spectroscopy. Effects ofdifferent experimental conditions such as eluent flow rate, ionic strength and pH on separation ofAl_(13) were investigated. Experimental results indicated that molecule size exclusion was not theonly parameter affecting the column chromatographic separation efficiency of Al_(13) but moleculecharge as well. Reducing the eluent flow rate, increasing the ionic strength and suitable pHresulted in increase in the separation efficiency. Experimental results clearly indicated that byvarying the experimental conditions, it is possible to produce pure Al_(13) species using a gelcolumn chromatographic technique.

关键词： Al13 species, column chromatography, polyaluminum chloride (PAC), separation and purification.

Polymer-assisted nanoparticulate contrast-enhancing materials

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science china Chemistry 2010年第3期53卷 479-486页

作者： DING Yin1,3,HU Yong2,WU Wei1 & JIANG XiQun1 1Laboratory of Mesoscopic Chemistry and Department of Polymer science and engineering,college of Chemistry & Chemical engineering,Nanjing university,Nanjing 210093,china 2National Laboratory of Solid State Microstructure,Department of material science and engineering,Nanjing university,Nanjing 210093,china 3Key Laboratory of Analytical Chemistry for Life science,Ministry of Education,School of Chemistry and Chemical engineering,Nanjing university,Nanjing 210093,china 1. Laboratory of Mesoscopic Chemistry and Department of Polymer science and engineering College of Chemistry & Chemical Engineering Nanjing University Nanjing 210093 China3. Key Laboratory of Analytical Chemistry for Life Science Ministry of Education School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China2. National Laboratory of Solid State Microstructure Department of Material Science and Engineering Nanjing University Nanjing 210093 China

The application of nanotechnology in medicine research has significant potential in modern biomedical research,disease diagnosis and *** fluorophore-based detection techniques have been widely used as imaging and signal transduction tools for the detection of trace levels of *** photosensitivity of the fluorophores,however,limits their application in such complex environments as living bio-systems where degradation or photobleaching *** nanoparticles have unique and stable optical,electrical,magnetic and catalytic properties because of their various shapes,sizes and *** potential of the nanoparticles as novel imaging agents has been studied as a possible solution to this *** modification of inorganic nanoparticles could enhance their biostability in physiological conditions and ability of targeting bioactive molecules.

关键词： contrast agent cell image gold nanoparticles iron oxide nanoparticles carbon nanotubes polymeric-inorganic hybrid nanoparticles

Effects　of　Traffic　Lights　on　CA　Traffic　Model

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Communications in Nonlinear science and Numerical Simulation 1997年第2期2卷 14-18页

作者： Suwei FENG , Guoqing GU + & Shiqiang DAI++ (shanghai Institute of Applied Mathematics and Mechanics, shanghai university, shanghai 200072) + (college of Systems science and Systems engineering, university of shanghai for science and Technolo shanghai Inst. Appl. Math. Mechanics Shanghai University Shanghai 200072 China Coll. of Syst. Sci. and Syst. Eng. Univ. Shanghai for Sci. and Technol. Shanghai 200092 China

ＥｆｅｃｔｓｏｆＴｒａｆｉｃＬｉｇｈｔｓｏｎＣＡＴｒａｆｉｃＭｏｄｅｌ１，２ＳｕｗｅｉＦＥＮＧ，ＧｕｏｑｉｎｇＧＵ＋＆ＳｈｉｑｉａｎｇＤＡＩ＋＋（ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＡｐｐｌｉｅｄＭａｔｈｅｍａｔｉ... 详细信息

ＥｆｅｃｔｓｏｆＴｒａｆｉｃＬｉｇｈｔｓｏｎＣＡＴｒａｆｉｃＭｏｄｅｌ１，２ＳｕｗｅｉＦＥＮＧ，ＧｕｏｑｉｎｇＧＵ＋＆ＳｈｉｑｉａｎｇＤＡＩ＋＋（ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＡｐｐｌｉｅｄＭａｔｈｅｍａｔｉｃｓａｎｄＭｅｃｈａｎｉｃｓ，Ｓｈ...

关键词： cellular automata traffic model traffic light phase transition

Online Load Operating Mode of Oil Film Bearing in High Speed Wire Rolling Mill

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武汉理工大学学报 2006年第S2期28卷 682-685页

作者： LI Yugui~(1.2) PANG Siqing~1 HUANG Qingxue~2 WANG Jianmei~2 ZHAO Chunjiang~2 1.college of Machinery and Vehicle engineering,Beijing Institute of Technology,Beijing 100081,china 2.college of material and science engineering,Taiyuan university of science and Technology,Taiyuan 030024,china college of Machinery and Vehicle engineering Beijing Institute of TechnologyBeijing 100081China college of material and science engineering Taiyuan University of Science and TechnologyTaiyuan 030024China college of Machinery and Vehicle engineering Beijing Institute of TechnologyBeijing 100081China college of material and science engineering Taiyuan University of Science and TechnologyTaiyuan 030024China

To study the mechanism of burnt damage of oil film bearing in high-speed wire rolling mill,reasonable tempera- ture sensors are designed and calibrated,pressure block of rolling mill has been transformed into pressure *** tempera- ture and load of oil film bearing in a domestic precision rolling F15 have been ***,a large sum of valuable test data was *** distributions rules of pressure and temperature under continuous online rolling state are recorded in detail. Theoretical and experimental results are beneficial to damage mechanism of oil film bearing,thus its service life could be pro- ***,such results could provide an important reference for online test and control.

关键词： oil film bearing damage mechanism online test

Effects of Citral on Aspergillus flavus Spores by Quasi-elastic Light Scattering and Multiplex Microanalysis Techniques

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Acta Biochimica et Biophysica Sinica 2004年第4期36卷 277-283页

作者： Man LUO1,2, Li-Ke JIANG2, Yao-Xiong HUANG3, Ming XIAO4, Bo LI4, and Guo-Lin ZOU1* 1college of Life sciences, Wuhan university, Wuhan 430072, china 2college of Life sciences, Anhui Agricultural university, Hefei 230036, china 3 Institute of Biomedical engineering, Ji’nan university, Guangzhou 510632, china 4Ministry of Education Key Laboratory for Biodiversity science and Ecological engineering, the Institute of Biodiversity science, Fudan university, shanghai 200433, china college of Life sciences Wuhan UniversityWuhan 430072 China college of Life sciences Anhui Agricultural UniversityHefei 230036 China Institute of Biomedical engineering Ji'nan UniversityGuangzhou 510632 China Ministry of Education Key Laboratory for Biodiversity science and Ecological engineering the Institute of Biodiversity Science Fudan UniversityShanghai 200433 China

Citral refined from Litsea cubeba oil has been found to have a strong influence on fungi, especially Aspergillus flavus. Multiplex microanalysis and quasi-elastic light scattering techniques were applied to study the effects of citral on Aspergillus flavus spores from the levels of membrane, organelle and intracellular macromolecule. It was found that citral injured the wall and the membrane of A. flavus spore, resulting in decrease of its elasticity. After entering the cell, citral not only influenced the genetic expression of mitochondrion reduplication and its morphology, but also changed the aggregation of protein-like macromolecules. As a result, cells, organelles and macromolecules lost their normal structures and functions, eventually leading to the loss of germination ability of A. flavus spores. Since Litsea cubeba oil as food additive and antifungal agent is safe and less poisonous, it is important to elucidate the inhibitory mechanisms of Litsea cubeba oil on the germination ability of A. flavus spore.

关键词： citral Aspergillus flavus spore multiplex microanalysis techniques quasi-elastic light scattering technique

On the generalized Busemann-Petty problem

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science china Mathematics 2007年第8期50卷 1103-1116页

作者： Song-jun L~(1,2+) Gang-song LENG~1 1.college of Mathematics and Computer science,Chongqing Normal university,Chongqin 400047,china 2.Department of Mathematics,shanghai university,shanghai 200444,china college of Mathematics Computer science Chongqing Normal University Chongqin 400047 China Department of Mathematics Shanghai University Shanghai 200444 China

The generalized Busemann-Petty problem asks whether the origin-symmetric convex bodies in ? n with a larger volume of all i-dimensional sections necessarily have a larger volume. As proved by Bourgain and Zhang, the answer to this question is negative if i > 3. The problem is still open for i = 2, 3. In this article we prove two specific affirmative answers to the generalized Busemann-Petty problem if the body with a smaller i-dimensional volume belongs to given classes. Our results generalize Zhang’s specific affirmative answer to the generalized Busemann-Petty problem.

关键词： star body cross i-section dual mixed volume Radon transform 52A30 52A40

Improving TCP Performance over Wireless Links Using Link-Layer Retransmission and Explicit Loss Notification

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Journal of Systems engineering and Electronics 2002年第4期13卷 17-23页

作者： Zhou Zhizhao & Han Zhengzhi college of Electronic and Information engineering, shanghai Jiaotong university, shanghai 200030, P. R. china college of Electronic and Information engineering Shanghai Jiaotong University Shanghai 200030 P. R. China

In order to support the mobility of computers during communication, the transport control protocol (TCP) connections between fixed host and mobile host often traverse wired and wireless networks, and the recovery of the losses due to wireless transmission error is much different from congestion control. This paper analyzes the interaction between TCP and link layer retransmission scheme when the correlated packet are losses handled, indicates that a higher value of the maximum number of successive link layer timeout retransmissions has an adverse effect on TCP ability to perform congestion control rapidly. To achieve a better TCP performance, the paper proposes a strategy combining link-layer selective-reject automatic repeat request (ARQ) with explicit loss notification mechanism, which can respond to congestion quickly while keeping wireless link more reliable, and make TCP react to the different packet losses more suitably.

关键词： Congestion control (communication) Mechanisms Performance Transmissions

Combustion Synthesis and Luminescent Properties of CaO: Eu^(3+), M^+ (M=Li, Na, K) Phosphor

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Journal of Wuhan university of Technology(materials science) 2010年第2期25卷 179-183页

作者：康明 college of material science and engineering Southwest University of Science and Technology

Li ^＋ , Na^ ＋ , or K ^＋ co-doped CaO： Eu^3＋ phosphors were prepared by the combustion synthesis method and characterized by X-ray diffraction （XRD）, photoluminescence and photolumi-nescence excitation （PL-PLE） spectra. The experimental results show that, upon excitation with 250 nm xenon light, the emission spectrum of the CaO： Eu^3＋ consists of 4f-4f emission transitions from the 5D0 excited level to the 7FJ （J=1, 2, 3） levels with the mainly electric dipole transition 5D0→7F2 of Eu3＋, indicating that the Eu^3＋ occupies a low symmetry. The charge-transfer band （CTB） shows somewhat red shift with the decreasing ionic radii of co-doped alkali metal ions. The PL and PLE intensities are significantly enhanced, especially the strongest intensity of luminescent is CaO： Eu^3＋, Li ＋ phosphor, when alkali metal ions are incorporated. The strongest peak of emission is slightly shifted from 614 to 593 nm, indicating that the Eu^3＋ ion locates in a symmetric position （Oh） when alkali metal ions are incorporated.

关键词： luminescence CaO: Eu^3+ combustion method