Effects of Dressing Poses on Clothing Thermal Insulation

Asfactorsinfluencingheatexchangeefficiencyofclothing ,clothingformanddressingwayareasimportantasclothingmaterial.Differentdressingwaysresultindifferentclothingforms,andchangethetotalthermalinsulationofclothing.Clothingformisdependentontheconstructionandmaterialcharacteristicsofclothingandthewearers bodyfigure .The performancesofaclothingsystemareinfluencedbyformanddressingways[1] .Theambientairnearthesurfaceofclothingonahumanbodyhasaunequaltemperaturedistribution .Theclothingpartwhichkeepsmor…     

Judgment of Parameters Correlation——Comprehensive Method

Researching parameters correlation is important to analysis of reliability uncertainty for passive system. The only criterion for traditional method to determine the parameters correlation is the correlation coefficient threshold. This method is subjective and needs improvement. Taking loss of normal feedwater accident of AP1000 passive residual heat removal system( PRHRS)as example,a comprehensive method was proposed to resolve the subjectivity problem of traditional method. Comprehensive method took account of scatter diagram of parameters and thermal transmission rule and significance testing of correlation coefficient comprehensively when judging parameters correlation. By comparing the effect of parameters judged by traditional and comprehensive methods respectively, we found the distance of traditional method was larger than that of comprehensive method,showing some parameters impacting thermal transmission rule removed by traditional method and comprehensive method could judge more precise and scientific parameters. So comprehensive method should be used to judge linear relation between parameters and thermal transmission rule.     

The Study of a New Method for Forecasting Non—stationary Series

A new method for forecasting non-stationary series is developed.Its steps are as follows.Step 1.Data delaminating.Non-stationary series is delaminated into several multi-scale steady data layers and one trend layer.Step 2.Modeling and forecasting each stationary data layer.Step 2.Imitating trend layer using polynomial.Step4.Combining the forecasting layers and imitating layer into one series,The EMD(Empirical Mode Decomposition) method suitable to preocess non-stationary series is selected to delaminate data,while ARMA(Auto Regressive Moving Aver age)model is employed to model and forecast stationary data layer and least square error method for trend layer regression.Aiming at forecasting length,forecasting orientation and selective method,experiments are performed for SAR(Synthetic Aperture Radar) images.Finally,an example is provided,in which the whole SAR image is restored via the method proposed by this paper.     

Numerical Method for Heat and Mass Transfer in Air Washer——3.Two-phase Flow in Eliminator

Numerical simulation method is applied in the study oftwo - phase flow dynamics in the eliminator of air wash-er. The carrier phase (air) is treated in Eulerian frame,the water droplets are tracked in the Lagrangian frame.A three - dimensional unsteady two - phase flow model isdeveloped. With the help of FLUENT software, air-stream velocity field and water droplets trajectories havebeen illustrated when their mixture passing through tra-ditional folded eliminator. The result of the simulationcan be used to investigate the mechanism of turbulent     

A Method to Defend File-Attacking

0 IntroductionMalware of information attacking ai ms to steal and de-stroy program and data of user or system,includingTroy horse,virus , worm,spy-ware,and so on. They havecausedinvaluable loss all over the world. Till now,research-ers can not define malware accurately,and have no wayto de-fend unknown malware or malicious applicationsin real-ti me.Anti-virus software adopts special algorithm,andthe keyisidentification of virus . However ,itis a well-known difficul-ty to recognize unknown vir…     

Selective Smoothed Finite Element Method

The paper examines three selective schemes for the smoothed finite element method (SFEM) which was formulated by incorporating a cell-wise strain smoothing operation into the standard compatible finite element method (FEM). These selective SFEM schemes were formulated based on three selective integration FEM schemes with similar properties found between the number of smoothing cells in the SFEM and the number of Gaussian integration points in the FEM. Both scheme 1 and scheme 2 are free of nearly incompressible locking, but scheme 2 is more general and gives better results than scheme 1. In addition, scheme 2 can be applied to anisotropic and nonlinear situations, while scheme 1 can only be applied to isotropic and linear situations. Scheme 3 is free of shear locking. This scheme can be applied to plate and shell problems. Results of the numerical study show that the selective SFEM schemes give more accurate results than the FEM schemes.     

A Coupling Model of the Discontinuous Deformation Analysis Method and the Finite Element Method

Neither the finite element method nor the discontinuous deformation analysis method can solve problems very well in rock mechanics and engineering due to their extreme complexities. A coupling method combining both of them should have wider applicability. Such a model coupling the discontinuous deformation analysis method and the finite element method is proposed in this paper. In the model, so-called line blocks are introduced to deal with the interaction via the common interfacial boundary of the discontinuous deformation analysis domain with the finite element domain. The interfacial conditions during the incremental iteration process are satisfied by means of the line blocks. The requirement of gradual small displacements in each incremental step of this coupling method is met through a displacement control procedure. The model is simple in concept and is easy in numerical implementation. A numerical example is given. The displacement obtained by the coupling method agrees well with those obtained by the finite element method, which shows the rationality of this model and the validity of the implementation scheme.     

Airbag Mapped Mesh Auto-Flattening Method

Current software cannot easily model an airbag to be flattened without wrinkles. This paper improves the modeling efficiency using the initial metric method to design a mapped mesh auto-flattening algorithm. The element geometric transformation matrix was obtained using the theory of computer graphics. The algorithm proved to be practical for modeling a passenger-side airbag model. The efficiency and precision of modeling airbags are greatly improved by this method.     

A Modified Beam Propagation Method Based on the Galerkin Method with Hermite-Gauss Basis Functions

1IntroductionResearchin photonic integrated circuits(PICs)and planar lightwave circuits(PLCs)has becomeactive inrecent years.Analysis and simulation ofelectromagnetic wave propagation are essential foroptimizing designs of these circuits.Therefore,various simulation techniques have been studiedfor this purpose[1].Among them,the beampropagation method(BPM)[1,2],whichis capableof treating both guided as well as radiated modessimultaneously,is currently the most widely usedtool.To date,numero…     

A Method of Homomorphic Encryption

0 IntroductionWittahliz tahtieo nde,vtehloepi mmepnotrt oanfc ien foofr tmhaet isoenciuzraittiyo nan adnsdec driegciy-of informationis increasingly recognized. Ordinary encryptioncan’t compute the ciphertext data, however , homomorphicencryption scheme can doit andfurthermore encrypt operationvalue automatically. Therefore, homomorphic encryptionscheme can be widely used in multi-party computation,elec-tronic voting,and mobile cryptography[1-3].Inthis paper ,theinterrelated technology of homo…     

声光调Q YAG脉冲激光修锐和整形超硬磨料砂轮

超硬磨料砂轮的修整是制约其优良磨削性能发挥的瓶颈。本文采用声光调Q YAG脉冲激光径向辐照砂轮表面，利用自己开发的一套在线检测闭环控制系统，控制激光脉冲的输出，对砂轮表面进行修整，达到了理想的整形精度，并发现可同时实现修锐，使超硬磨料砂轮的激光修锐和整形可合二为一，通过单脉冲试验研究总结出激光参数和工艺参数对砂轮修整效果的影响特点，选择优化的参数进行修整，获得了较好的修整效果。     

激光入射角对修整圆柱形CBN砂轮影响

激光入射角是激光修整圆柱砂轮的重要参数之一,它不仅影响光束入射能量密度,而且影响激光修整砂轮的尺寸精度与质量.介绍了采用N d:YAG激光器修整陶瓷CBN砂轮的新方法.根据光束的几何光学原理,采用建模与试验方法研究了入射角、临界角对激光修整小CBN砂轮的影响.考查了入射角不同引起热传导的差异,导致激光修整材料去除量的不同.进而通过调整入射角,优化选择激光能量密度,达到有效修整砂轮的目的.对入射角和临界角的建模与试验分析有助于深入了解激光修整砂轮机理.用SEM显微观察激光修整砂轮的微观状态表明研究结果可靠.     

THE EFFECT OF THE CBN WHEEL DRESSING AND THE GRAIN HEIGHT PROTRUDING FROM THE BOND ON THE GRINDING PERFORMANCE

CBN (Cubic Boron Nitride) is a highly efficient abrasive and has unique properties (highhardness, high thermal stability and high chemical inertia). As early as 1969 CBN Wheels had al-ready been made and showed excellent performance for grainding high speed steels and othermaterials hard to be ground. So far, however, CBN Wheels are still not popularly utilized in theindustry, the writer considers the main reason being the inadequate study for practical applica-tions and especially the suitable dressing technique. The dressing of resinoid CBN Wheels discussed in the paper, is different from that ofconventional ones. It has to be divided into two operations, truing and sharpening, each of whichhas its specific and independent functions. A simple dressing method with a lot of informationsuitable for production is studied; finally, the grain height protruding from the bond is taken asan index for evaluating the dressing results, and the effect of grain height on the grinding per-formance is discussed. By selecting proper conditions according to the workpiece requirements, abetter technical and economical benifit can be obtained.     

渐开线内齿轮成型磨削砂轮修整方法

成形法磨齿的关键因素是成型砂轮的修整.本文介绍了一种渐开线内齿轮成型磨削的砂轮修整方法.根据渐开线的形成原理,采用金刚轮作为修整工具,用数字控制方式完成修整运动.通过数控程序可实现对不同齿数和模数的任意参数渐开线齿形的修整.     

青铜结合剂金刚石砂轮激光修锐试验研究

用YAG脉冲激光对青铜结合剂金刚石砂轮进行修锐试验研究,为改善激光修锐效果,提出辅助交叉吹气的方法,实验研究了激光功率密度和离焦量对结合剂去除效果的影响.对修锐后的砂轮表面形貌显微观察表明,辅助交叉吹气方法有助于磨粒的暴露,有明显的修锐效果.同时,对修锐砂轮的磨削力测量结果表明,修锐后法向磨削力比修锐前下降10%～15%,切向下降5%～7%,比单独同轴吹气下降3%～5%,提高了砂轮的磨削性能.该结果为金属结合剂超硬磨科砂轮的激光修锐应用提供了理论与试验依据.     

超硬砂轮修整的研究——制动式整形器的理论与实践

超硬砂轮修整的困难,是生产上推广应用的主要障碍之一。本文对制动式整形器进行了理论上的分析,并进行了实验。找出了影响整形效率和整形精度的规律,提出了制动式整形器合理使用的方法和适合的参数。整形器价格低廉,可直接在生产上使用,是一种有效的整形工具。     

特种加工在修整金属结合剂砂轮中的应用

介绍了特种加工技术在修整金属结合剂超硬磨料砂轮中的应用．特种加工修整技术针对金属结合剂和磨料的不同特性,对结合剂进行蚀除,有效地提高了金属结合剂超硬磨料砂轮的修整效率和质量,具有较好的应用前景．     

DRESSING OF CORUNDUM WHEEL WITH POLY CRYSTALLINE DIAMOND

Wheel dressing is an important part of grinding, it influences not only the grinding quality ofthe workpiece,but also the cost of grinding.At present the single point mined diamond is widelyused as dresser in industry.Because the mined diamond is rare in nature and dear,it has a practicalsignificance to find a substituting material for the mined diamond.Due to the isotropy of PCD(polyerystalline diamond),new sharp cutting edges will expose continuously during dressing opera-tions,maintaining high dressing efficiency.Tests show that dressing corundum wheel,especiallydressing those for internal grinding,PCD dresser is suitable to common hardnesses,and grains ofwheels and smaller depth of dressing.The authors consider that PCD dressing can be used to sub-stitute completely the mined diamond dresser and the cost of dressing may be reduced.     

用普通磨床进行超精度磨削工艺方案

本文在分析超精磨削原理、工艺特点的基础上,提出了在普通磨床上进行超精度磨削加工的工艺方案。该方案分别从普通磨床为满足超精度磨削加工前的修整,砂轮修整,加工切削参数的选择及加工操作的注意事项等几个方面进行分析和研究。方案在技术可行的情况下、能有效降低加工成本和提高生产效率,在机械加工行业中具有一定的推广应用价值。     

修磨轮双自由度修磨圆柱蜗杆齿形的异变分析

介绍一种精修磨圆柱蜗杆的新方法 ,即用高精度的渐开线齿轮形超硬修磨轮对圆柱蜗杆进行双自由度精修磨 .理论分析表明 ,修磨后的蜗杆齿面形状为 ZI蜗杆齿形 ,且在一定条件下 ,也可得到 ZA蜗杆齿形 .该方法也可用于精加工其它齿形的蜗杆 ,且操作简便 ,成本低 ,易于推广应用