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NONLINEAR FREE SURFACE ACTION WITH AN ARRAY OF VERTICAL CYLINDERS

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Acta Mechanica Sinica 2004年第3期20卷 247-262页

作者： HUANG j.b. Department of Engineering Science University of OxfordUK

Nonlinear diffraction of regular waves by an array of bottom-seated circular cylindersis investigated in frequency domain,based on a Stokes expansion approach.A complete semi-analyticalsolution is developed which allows an efficient evaluation of the second-order potentials in the entirefluid domain,and the wave forces on the *** are derived for the second-orderpotential in the vicinity of individual *** expressions have a simple form,thus providingan effective means for investigating the wave enhancement due to nonlinear interactions with *** on the present method,the wave run-up and free-surface elevations around an arrayof two,three and four cylinders are investigated numerically.

关键词： nonlinear wave diffraction water waves frequency analysis semi-analytical method

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

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)

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

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

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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cnki会议

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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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维普期刊数据库

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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

Advances in Graphene‑based Electrode for Triboelectric Nanogenerator

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Nano-Micro Letters 2025年第1期17卷 378-403页

作者： bin Xie Yuanhui guo Yun Chen Hao Zhang jiawei Xiao Maoxiang Hou Huilong Liu Li Ma Xin Chen Chingping Wong State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment Guangdong University of TechnologyGuangzhou 510006People’s Republic of China School of Electromechanical Engineering Guangdong University of TechnologyGuangzhou 510006People’s Republic of China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

With the continuous development of wearable electronics,wireless sensor networks and other micro-electronic devices,there is an increasingly urgent need for miniature,flexible and efficient nanopower generation *** nanogenerator(TENG)technology can convert small mechanical energy into electricity,which is expected to address this *** the core component of TENG,the choice of electrode materials significantly affects its *** metal electrode materials often suffer from problems such as durability,which limits the further application of ***,as a novel electrode material,shows excellent prospects for application in TENG owing to its unique structure and excellent electrical *** review systematically summarizes the recent research progress and application prospects of TENGs based on graphene *** precision processing methods of graphene electrodes are introduced,and the applications of graphene electrode-based TENGs in various scenarios as well as the enhancement of graphene electrodes for TENG performance are *** addition,the future development of graphene electrode-based TENGs is also prospectively discussed,aiming to promote the continuous advancement of graphene electrode-based TENGs.

关键词： Triboelectric nanogenerator Precision processing Graphene electrode Self-powered sensor