Automatic Fixture Design for Non-rotational Parts Using Fuzzy Comprehensive Judgment Method

ＡｕｔｏｍａｔｉｃＦｉｘｔｕｒｅＤｅｓｉｇｎｆｏｒＮｏｎ┐ｒｏｔａｔｉｏｎａｌＰａｒｔｓＵｓｉｎｇＦｕｚｚｙＣｏｍｐｒｅｈｅｎｓｉｖｅＪｕｄｇｍｅｎｔＭｅｔｈｏｄ＊ＷｕＤａｎ（吴丹），ＷａｎｇＸｉａｎｋｕｉ（王先逵），ＰｕＪｉａｎ（蒲建）Ｄｅｐａｒｔ...     

Estimation Method of Schedulecost Correlation Coefficient of Spaceflight Project

To evaluate the cost risk and the schedule risk of the spaceflight project, the schedulecost (SC) correlation coefficient is directly appointed according to the experts’ experience usually. This paper deduces SDMCU (the schedule distribution model considering the effect of the cost uncertainty), and then proposes the approximate formula to estimate the ln (S)C correlation coefficient based on the models of SDMCU and CDMSU (the cost distribution model considering the effect of the schedule uncertainty). Furthermore, an approximate relationship expression of the SC and the ln (S)C correlation coefficients is put forward according to general facts and the Taylor expansion, and advanced by means of mass numerical validation is the general rule of obtaining the estimation value of the schedulecost correlation coefficient based on the historical data.     

Correlation Degree and Correlation Coefficient of Multi-Output Functions

We present definitions of the correlation degree and correlation coefficient of multi-output functions. Two relationships about the correlation degree of multi-output functions are proved. One is between the correlation degree and independency, the other is between the correlation degree and balance. Especially the paper discusses the correlation degree of affine multioutput functions. We demonstrate properties of the correlation coefficient of multi-output functions. One is the value range of the correlation coefficient, one is the relationship between the correlation coefficient and independency, and another is the sufficient and necessary condition that two multi-output functions are equivalent to each other.     

Numerical Method for Evaluating Aircraft''''s Stability Parameters through an Aerodynamic Model

ＮｕｍｅｒｉｃａｌＭｅｔｈｏｄｆｏｒＥｖａｌｕａｔｉｎｇＡｉｒｃｒａｆｔ＇ｓＳｔａｂｉｌｉｔｙＰａｒａｍｅｔｅｒｓｔｈｒｏｕｇｈａｎＡｅｒｏｄｙｎａｍｉｃＭｏｄｅｌＬｉｕＱｉｕｓｈｅｎｇ（刘秋生），ＲｅｎＹｕｘｉｎ（任玉新），ＳｈｅｎＭｅｎｇｙｕ（沈...     

Kinetic Parameters of Thermal Degradation of Polymers

The derivative expressions between activation energy(E) and the temperature at the maximum mass lossrate(T_(max)) and between activation energy (E) andexponent (N) were deduced in the light of Arrheniustheory. It was found that the increase of activationenergy results in the decrease of exponent and the     

Method of Homomorphic Encryption

The existing homomorphie eneryption scheme is based on ring of the integer, and the possible operators are restricted to addition and multiplication only. In this paper, a new operation is defined Similar Modul. Base on the Similar Modul, the number sets of the homomorphic encryption scheme is extended to real number, and the possible operators are extended to addition, subtraction, multiplication and division. Our new approach provides a practical ways of implementation because of the extension of the operators and the number sets.     

Identification of the Material Parameters of Laminated Plates

ＩｎｔｒｏｄｕｃｔｉｏｎＦｏｒｓｔｒｕｃｔｕｒａｌｍｅｍｂｅｒｓｃｏｎｓｔｒｕｃｔｅｄｏｆｉｓｏｔｒｏｐｉｃｍａｔｅｒｉａｌｓ,ｔｈｅｍａｔｅｒｉａｌｐｒｏｐｅｒｔｉｅｓｃａｎｂｅｄｅｔｅｒｍｉｎｅｄｂｙｒｏｕｔｉｎｅｍｅａｓｕｒｅｍｅｎｔｓｏｆｔｙｐｉｃａｌｓｐｅｃｉｍｅｎｓ.Ｈｏｗｅｖｅｒ,ｆｏｒｃｏｍｐｏｓｉｔｅｍａｔｅｒｉａｌｓ,ｔｈｅｈｅｔｅｒｏｇｅｎｅｉｔｙａｎｄａｎｉｓｏｔｒｏｐｙｍａｋｅｉｄｅｎｔｉｆｉｃａｔｉｏｎｏｆｔｈｅｍａｔｅｒｉａｌｐｒｏｐｅｒｔｉｅｓｍｏｒｅｃｏｍｐｌｉｃａ…     

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…     

A Comprehensive Analysis of ELT Reform in Jinzhong

本文对晋中英语基础教育教改状况作了综合分析介绍，并且指出改革的成就与不足，对此提出了自己的看法。     

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.     

Research on Clothing Retail Store Location in Shanghai Business Streets With Fuzzy Comprehensive Evaluation Method

Introduction Withtheboomingdevelopmentofmarketeconomyin China,continuouschangesandimprovementhavetaken placeinChinaclothingretailingmarket.Clothingretailers haveinevitablypaidincreasinglyattentiontotheretail storeswhicharesalesterminatorshavingdirectconnection withconsumerintheprocessofclothing.Thelocation selectiondecisionisoneofthekeystosuccess.Someexperts evenregardedtheplaceasthemostimportantfactor.LocationselectiondecisionsinChinaareoftenmadein anindiscreetandaccidentalway.Someclothingr…     

A New Method for Dressing Fine Grain Diamond Wheels——the Soft-Elastic Dressing Method

IntroductionInrecentyears,ceramicshavebeenmuchmorewidelyusedinthefieldsofoptics,electronics,abrasion-resistancepartsandthermalresistanceparts.Ceramicsareveryhardandchemicallyinert,havehighthermalresistance,highabrasionresistanceandlowelectricalconductivity.Buttheyareratherdifficulttomachinebecauseoftheirhardnessandbrittleness.Grindingwithfinegraindiamondwheelsisanefficientmethodforpreciseandultra-precisemachiningofceramics.Beforegrinding,thefinegraindiamondwheelrequiresdressing.Thedressingpro…     

Influence of Reaction Parameters on Water Absorbency of Starch Grafted Superabsorbents

ＩｎｔｒｏｄｕｃｔｉｏｎＳｔａｒｃｈｉｓａｋｉｎｄｏｆｎａｔｕｒａｌｐｏｌｙｓａｃｃｈａｒｉｄｅｗｉｄｅｌｙｕｓｅｄａｓｒａｗｍａｔｅｒｉａｌｉｎｃｈｅｍｉｃａｌｉｎｄｕｓｔｒｙ .Ｗｉｔｈｔｈｅｄｗｉｎｄｌｉｎｇｓｕｐｐｌｉｅｓｏｆｐｅｔｒｏｌｅｕｍ ,ｔｈｅｕｓａｇｅｏｆｓｔａｒｃｈｗｉｄｅｌｙｓｐｒｅａｄｓｉｎｄｉｆｆｅｒｅｎｔｆｉｅｌｄｓｂｅｃａｕｓｅｓｔａｒｃｈ ｓａｂｕｎｄａｎｃｅａｎｄｌｏｗｃｏｓｔ.Ｇｒａｆｔｐｏｌｙｍｅｒｉｚａｔｉｏｎｏｆｓｏｄｉｕｍａｃｒｙｌａｔｅｏｎｔｏｓｔａｒｃ…     

The Application of Neural Network in Recognition of Fabric Weave Parameters

IntroductionFabricweaveparametersaretheimportantcharactersoffabricweave.Todistinguishastructureoffabricweave,threeproblemshavetobesolved.Oneistofindthepositionofinterlacingpoint,anotheristodeterminethepropertyofinterlacingpoint,andthethirdistodistinguishthenameofinterlacingpoint.Inthisstudy,themethodofidentifyingfabricweaveparametersisbasedonthefollowingthreeassumptions:1)Thepositionofweftinfabricisdeterminedbypeakandvalebrightnessprojectioncurveinthedirectionofwarp;2)Thechangeinweftsbrightne…     

Synthesis of Polymerizable Amphiphiles with Systematic Variation of Critical Packing Parameters

An amphiphile is a molecule composed of hydrophilic part and hydrophobic part, which are incompatible and tend to separate from each other. The tendency of separation is often promoted by addition of water and sometimes also oil. Under balanced conditions the mixtures form macroscopically homogeneous phases, including isotropic solution phases and liquid crystalline phases. Correlation of the amphiphile structure with its preferred phases could be understood with a simple geometric model, which defines a dimensionless Critical Packing Parameter （CPP） to describe the relative bulkiness of the hydrophobic part and the hydrophilic part in an amphiphile.     

Method of AHP and Improvement of Its Uniformity Examination

该文对ＡＨＰ中的一致性检验方法进行了改进，进一步丰富了ＡＨＰ方法的内容．     

Pinch Analysis of Heat Exchange Problems with Uncertain Parameters

ＰｉｎｃｈＡｎａｌｙｓｉｓｏｆＨｅａｔＥｘｃｈａｎｇｅＰｒｏｂｌｅｍｓｗｉｔｈＵｎｃｅｒｔａｉｎＰａｒａｍｅｔｅｒｓＨｕＳｈａｎｙｉｎｇ（胡山鹰），ＣｈｅｎＢｉｎｇｚｈｅｎ（陈丙珍），ＳｈｅｎＪｉｎｇｚｈｕ（沈静珠）ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉ...     

QSPR between Physical-Chemical Properties and Molecule Parameters of Alkanes

A set of molecule parameters, namely, N, N′, p, q, n, were used to express the structures of alkanes. A correlative model was established between certain physical-chemical properties and molecular parameters of alkanes by regression method. Eight physical-chemical properties, such as evaporation heat （△vHm^20）, density（D^20 ）, capacity （C^20）, surface tension （δ^20）, boiling point （Tb）, critical temperature（Tc）, critical pressure（Pc） and critical volume（Vc）, of fifty-six C3-C16 alkanes were calculated directly from the model in this paper. The calculated values are in good accordance with the literature ones reported for alkanes, and the correlation coefficients （R） equal or exceed 0.99 . The research results indicate that the principle of the method is simple and clear, the method is practical, the correlativity is excellent, and the predicted data are credible.