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ESTIMATE ACCURACY OF NONLINEAR COEFFICIENTS OF SQUEEZEFILM DAMPER USING STATE VARIAbLE FILTER METHOD

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Chinese journal of Mechanical Engineering 1998年第3期11卷 13-19页

作者： Zhang, Youyun Roberts, j.b. Xian jiaotong Univ Xian China

The estimate model for a nonlinear system of squeeze film damper (SFD) is *** method of state variable filter (SVF) is used to estimate the coefficients of *** factors which are critical to the estimate accuracy are ... 详细信息

关键词： Nonlinear coefficient Squeeze film State variable filter Parameter estimate

肺移植后双眼内源性足分支霉菌感染所致眼内炎

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世界核心医学期刊文摘（眼科学分册） 2005年第7期1卷 19-19页

作者： Vagefi M.R. Kim E.T. Alvarado R.G. j.b. crawford 潘佳鸿 Hogan Eye Pathology Laboratory Univ. of California San Francisco 10 Koret Way San Francisco CA 94143- 0730United States

Purpose: To report a case of bilateral endogenous fungal endophthalmitis resulting from disseminated Scedosporium prolificans. Design: Observational case report. Methods: A56- year- old woman with cystic fibrosis status post dual lung transplantation on chronic immunosuppressive therapy presented with acute graft rejection. Cultures of bronchial brushings revealed S. prolificans. Three weeks after admission, the patient noted increased blurriness and a central scotoma in her right eye. Dilated fundus examination revealed profound vitritis in the right eye with hemorrhagic retinitis involving the macula. A peripheral, yellow choroidal infiltrate with overlying retinitis and localized vitritis was present in the left eye. Results: Intravitreal antibiotics were initiated, and vitreous cultures revealed S. prolificans. The patient ultimately succumbed to her disseminated disease. Pathologic examination of the eyes confirmed bilateral endogenous fungal endophthalmitis. Conclusion: S. prolificans is an opportunistic infection resistant to standard antifungal therapy that can result in endogenous endophthalmitis in immunocompromised individuals.

关键词：肺移植霉菌感染眼内炎内源出血性视网膜炎囊性纤维病急性排斥反应中心暗点条件致病菌免疫缺陷

ELASTICITY OF MONOLAYER OF LINOLEIC ACID AND ITS POLYMER

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Chinese journal of Polymer Science 1998年第2期16卷 147-154页

作者：何平笙 PELTONEN j.P.K. ROSENHOLM j.b. Department of Polymer Science and Engineering University of Science and Technology of China Hefei 230026 China Department of Physical Chemistry Abo Akademi University Abo Finland

The dynamic elasticity of linoleic acid monolayer on a subphase of 10** minus **4mol/L TbCl//3 at various surface pressure has been measured by means of dynamic oscillation method in measuring the change of surface pressure caused by periodic compression-expansion cycles of the barrier. The elasticity of monolayer increases with increasing of surface pressure linearly. The linoleic acid polymer monolayer has been obtained under UV-irradiation in situ when keeping a constant surface pressure. but the elasticity of the resulting polymerized monolayer is even smaller than that of its corresponding monomer monolayer. The elasticity of the polymerized linoleic acid monolayer decreases with increasing polymerization time. The explanation based on entropy has been presented. (Author abstract) 10 Refs.

关键词： elasticity monolayer linoleic acid

STUDY ON PTA CLAD (Cr,Fe)_7C_3/γ-Fe CERAMAL COMPOSITE COATING

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Acta Metallurgica Sinica(English Letters) 2005年第6期18卷 695-700页

作者： j.b. Liu j.H. Huang L.M. Wang Department of Mechanical and Electronic Engineering Weifang University Weifang 261061 China School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

A wear resistant （Cr, Fe）7C3/γ-Fe ceramalcomposite coating wasfabricatedon substrate of a 0.45% C carbon steel by plasma transferred arc （PTA） cladding process using the Fe-Cr-C elemental powder blends. The microstructure, microhardness and dry sliding wear resistance of the coating were evaluated. Results indicate that the plasma transferred arc clad ceramal composite coating has a rapidly solidified microstructure consisting of blocky primary （Cr, Fe）7C3 and the interblocky （ Cr, Fe）7C3/γ-Fe eutectics and is metallurgically bonded to the 0.45%C carbon steel substrate. The ceramal composite coating has high hardness and excellent wear resistance under dry sliding wear test condition.

关键词： plasma transferred arc ( PTA ) cladding ( Cr Fe )7C3/γ-Fe coating,microstructure wear

ANALYSIS OF STAbILITY CHARACTERISTICS OF NONLINEAR FLUID STRUCTURE INTERACTION SYSTEM IN INTERNAL FLOWS

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journal of Hydrodynamics 2001年第2期13卷 96-105页

作者： Zhang, L.X. Huang, W.H. Li, j.b. Kunming Univ. of Sci. and Technol. Kunming 650051 China

A set of nonlinear partial differential equations was used to describe the motions of an internal flowing system, with the consideration of transient fluid structure interaction (FSI). The stability characteristics of the system were analyzed on the basis of the nonlinear FSI-equation model. The results show that the stability of the nonlinear FSI system become very complicated because of the influence of strongly coupled interaction between flowing liquid and vibrating pipe. The flowing velocity, pressure, the piping stiffness, and constrained conditions, etc. play a very important role in developing procedure of the system stabilization. In an analysis example given in this paper, for example, when the flowing pressure is comparatively small, the system exhibits flutter instability, and when the flowing pressure is increases to a specified value, a subcritical divergence and a supercritical flutter bifurcation take successively place in the same velocity range.

关键词： bifurcation (mathematics) Differential equations Equations of motion Flow interactions Vibrations (mechanical)

Optimizing methyl-eugenol aromatherapy to maximize posttreatment effects to enhance mating competitiveness of male bactrocera carambolae （Diptera： Tephritidae）

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Insect Science 2015年第5期22卷 661-669页

作者： Ihsan ul Haq Marc j.b. Vreysen Carlos Caceres Todd E. Shelly jorge Hendrichs Insect Pest Control Laboratory Joint FAOIIAEA Division of Nuclear Techniques in Food and Agriculture Seibersdorf Austria National Agricultural Research Centre Park Road Islamabad Pakistan USDAIAPHIS 41-650 Ahiki Street Waimanalo HI 96795 USA and Insect Pest Control Section Joint FAOIIAEA Division of Nuclear Techniques in Food and Agriculture Vienna Austria

Methyl-eugenol （ME）（1,2-dimethoxy-4-（2-propenyl）benzene）, a natural phy- tochemical, did enhance male bactrocera carambolae Drew ＆ Hancock （Diptera： Tephri- tidae） mating competitiveness 3 d after ingestion. Enhanced male mating competitiveness can significantly increase the effectiveness of the sterile insect technique （SIT）. ME appli- cation to mass reared sterile flies by feeding is infeasible. ME application by aromatherapy however, would be a very practical way of ME application in fly emergence and release facilities. This approach was shown to enhance mating competitiveness ofb. carambolae 3 d posttreatment （DPT）. Despite this added benefit, every additional day of delaying re- lease will reduce sterile fly quality and will add cost to SIT application. The present study was planned to assess the effects of ME-aromatherapy on male b. carambolae mating competitiveness 1DPT and 2DPT. ME aromatherapy 1DPT or 2DPT did enhance mating competitiveness of b. carambolae males whereas ME feeding 1DPT and 2DPT did not. Male mating competitiveness was enhanced by the ME aromatherapy irrespective if they received 1DPT, 2DPT or 3DPT. ME aromatherapy, being a viable approach for its applica- tion, did enhance mating competitiveness of male b. carambolae 1 d posttreatrnent as ME feeding did 3 d after ingestion.

关键词： bactrocera carambolae mating competitiveness ME aromatherapy methyl-eugenol ME feeding posttreatment effect SIT

Nutritional status of four species of giant land snails in Nigeria

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journal of Zhejiang University-Science b(biomedicine & biotechnology) 2006年第9期7卷 686-689页

作者： FAGbUARO O OSO j.A. EDWARD j.b. OGUNLEYE R.F. Department of Zoology Faculty of Science University of Ado-Ekiti PMB 5363 Ado Ekiti Nigeria

Four species of African giant land snails （Archachatina marginata （ovum ） Pfeiffer, Archachatina marginata （saturalis ） Philippi, Achatina achatina and Limicolaria spp.） were assessed for their proximate and mineral compositions aimed at establishing their nutritive values on wet weight basis. Analysis of muscle revealed that composition of crude protein varied from 18.66%±0.57% in Limicolaria spp. and 20.56%±L0.05% in Archachatina marginata （ovum） Pfeiffer; moisture content was 76.56%±0.04% in Archachatina marginata （ovum） Pfeiffer and 78.68%±0.68% in Limicolaria spp. and ash was 1.34%±0.02% in Achatina achatina and 1.44%±0.01% in Archachatina marginata （ovum） Pfeiffer. These values were statistically different from each other （P〈0.05）. Carbohydrate and fat content were generally low. Crude fibre was not detected in any of the species. The concentrations of zinc, iron, manganese, magnesium, calcium, phosphorus, sulphur, potassium and sodium in the flesh of the snails were determined. Values of iron, magnesium, calcium, phosphorus, potassium and sodium were consistently high while cobalt, copper and lead were not detected. Snails complement the required trace and minor elements needed for proper growth and development in human being, so it is recommended for regular consumption.

关键词： Snail Nutrition Proximate Minerals

A Novel Fast Intra Prediction Algorithm applied in H.264/AVC

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A Novel Fast Intra Prediction Algorithm applied in H.264/AVC

STUDY ON THE SiC_p./Al-ALLOY COMPOSITE AUTOMOTIVE bRAKE ROTORS

2006 8th International Conference on Signal Processing

作者： Song,j.b. Li,b. Li,W. jiang,L. Digital Media Laboratory School of Computer Science and EngineeringBeihang University

ISBN: (纸本)0780397371

＜正＞Intra prediction applied in H.264/AVC improves compression efficiency of I frame *** the full search algorithm is of high computational expense,which conflicts with some real time application and embedded systems with limited calculation *** order to promote prediction speed,a fast intra prediction algorithm is proposed in this paper which selects appropriate prediction block size based on complexity of the I frame,uses an annular sliding window to select prediction mode dynamically and defines a simple block match *** results show that it is so practical and valid that the match speed has been doubled while the quality of reconstruction I-frame is decreased only slightly.

关键词： video coding intra prediction block size annular slide window bMR

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Acta Metallurgica Sinica(English Letters) 2000年第4期13卷 974-980页

作者： Ding, Z.L. Fan, Y.C. Qi, H.b. Ren, D.L. Guo, j.b. jiang, Z.Q. Shijiazhuang Railway Inst Shijiazhuang China

The SiCp/Al-alloy composite front brake rotors designed for Shanghai Santana cars were prepared by semi-solid stirring+liquid forging process. The composite brake rotors were subjected to dynamometer tests on a SCHENCK brake testing system, referring to TL110 standard of VOLKSWAGEN Co. The friction coefficient and thermal response during fade testing and the wear performance of the composite rotors were studied as the functions of various parameters such as braking pressures, initial speeds, initial temperatures, torque and decelerations, and were compared with those of conventional cast iron rotors. The results show that the properties of the composite rotors can achieve the requirements of commercial cast iron rotors. The results also show that the friction coefficients of the composite rotors under different braking conditions are within the deviation band specified by the TL110 standard, and the temperature rise of composite rotors is lower than that of cast iron rotors at the end of each fade stop. The wear resistance of composite rotors is higher than that of cast iron rotors. The friction mechanism and wear mechanism were analyzed.

关键词： brakes Friction Metallic matrix composites Rotors Silicon carbide Wear resistance