A New Method with High Confidence for Validation of Computer Simulation Models of Flight Systems

Computer simulation models may by used to gain further information about missile performance variability. Model validation is an important aspect of the test program for a missile system. Validation provides a basis for confidence in the model's results and is a necessary step if the model is to be used to draw inference about the behavior of the real missile. This paper is a review of methods useful for validation of computer simulation models of missile systems and provides a new method with high degree of confidence for validation of computer simulation models of missile systems. Some examples of the use of the new method in validating computer simulation models are given.     

充排法模拟内燃机循环的CAD基础

0 前言 基本能量方程和质量连续方程适用于内燃机进气管、气缸及排气管,只是在循环某一部分或全循环内有许多项为零。当质量通过发动机时,可视每一支管或气缸为一个逐次填充与排空的独立控制体,由此取名为填充与排空模型。每一控制体,V(i),赋予一个序数标(i),以便依顺序求解能量方程及质量方程的各参数。这样就可算出发动机循环中离散点上的温度、压力、空燃比及质量的变化率。     

INTERPOLATED FINITE ELEMENT METHODS FOR SECOND ORDER HYPERBOLIC EQUATIONS AND THEIR GLOBAL SUPERCONVERGENCE

We develop the interpolated finite element method to solve second-order hy-perbolic equations. The standard linear finite element solution is used to generate a newsolution by quadratic interpolation over adjacent elements. We prove that this interpo-lated finite element solution has superconvergence. This method can easily be applied togenerating more accurate gradient either locally or globally, depending on the applications.This method is also completely vectorizable and parallelizable to take the advantages ofmodern computer structures. Several numerical examples are presented to confirm ourtheoretical analysis.     

ON THE BEST UNIFORM CONVERGENCE RATE OF EB ESTIMATORS

ＯＮＴＨＥＢＥＳＴＵＮＩＦＯＲＭＣＯＮＶＥＲＧＥＮＣＥＲＡＴＥＯＦＥＢＥＳＴＩＭＡＴＯＲＳＬＩＡＮＧＨｕａ（ＩｎｓｔｉｔｕｔｅｏｆＳｙｓｔｅｍｓＳｃｉｅｎｃｅ，ＡｃａｄｅｍｉａＳｉｎｉｃａ，Ｂｅｉｊｉｎｇ１０００８０，Ｃｈｉｎａ）ＹＵＡＮＹａｈｕａ（...     

人类：“地球飞船”的乘客还是飞行员

20世纪后期 ,当人们第一次看到地球像一个悬在空中的球体 ,于是人们开始重新审视自己的家园。从空中看到的景象给人以整体的印象 :海洋、云、沙漠、森林 ,以及一些人类活动的迹象都是整个地球系统的组成。因此 ,当科学的“地球系统”的范例被推演出来时 ,“地球飞船”就无疑地被大众所接受。而“地球系统”的概念则成为“世界变化”项目中的基础概念。在整个人类历史中 ,尤其是最近的 1 0 0到2 0 0年里 ,很明显地 ,人类只是“地球飞船”唯一的“乘客”。但现在 ,人类已从自己的“乘客”座位上走了出来 ,要作为这架飞船的“飞行员”。当我们…     

STUDY ON ELIMINATING FLUORESCENCE IN COTTON PULP WITH PERACETIC ACID

INTRODUCTIONIn resent years people have paid more and more attention to the elimination of fluorescence in cotton linter for the sake of getting better cotton linter pulp since some user ask for higher quality cotton pulp. Cotton linter is a kind of industrial material used to make fine paper, synthetic fiber, medicine additives and other chemical products. Some impurities containing fluorescence usually enter into linter during the processing and purchase, especially in the low grade of l…     

ONLINE CHARGE MEASUREMENTS ENABLES PROCESS OPTIMIZATION AND AUTOMATIC CONTROL OF FIXATIVE DOSAGES

1.INTRODUCTIONFor two decades, electric charges have been a vital parameter for quality monitoring of pulp suspensions. Most mill laboratories conduct charge measurements as a daily routine that is considered basic to quality assurance.Although online charge measuring systems have been commercially available for some 15 years now, just a few hundred systems are currently installed in paper mills worldwide. Out of these, no more than 10 % are applied for automatic control of additive dosag…     

ANALYSIS OF THE MAIN FACTORS AFFECTING SECONDARY FIBER DEINKING

1.INTRDUCTIONChina is a country which lack of abundant wood material for papermaing,the nonwood fiber has been the main material in many pulping and papermaking factories in China. Presently, because of environmental and economic reasons, the nonwood fiber pulping especially wheat straw and rice straw pulping have been restricted in some area, and the nonwood pulping is face to a atrophy situation gradually in some area in China. Waste paper is a important secondary fiber material for Chi…     

Non-gyroscope DR and adaptive information fusion algorithm used in GPS/DR device

1 .INTRODUCTIONWith the development of intelligent transport sys-tem(ITS) ,the real-ti me navigation is being givenmore and more attention. One of the key technolo-gies in vehicle navigationis to get the vehicles’po-sition continuously and accurately . Nowadays ,most of the vehicle position devices in use employGPS. However , the satellite signal is frequentlyscreened or disturbed when vehicles running amonghigh buildings , in tunnels or under viaducts ,which makes GPS receiver unable…     

Preparation and characteristics of flexible all-organic thin-film field-effect transistor

Much attention has been attracted to organic thin-film field-effect transistors (OTFFETs) in the past decades[1—4]. Because of their lower cost and easier preparation, OTFFETs are considered to be useful in driving liquid crystal displays (LCD) and organic light-emitting diodes (OLED). Furthermore, flexible OTFFETs will be one of the most useful electronic devices for flexible active matrix driving circuits. OTFFETs based on pentacene single crystal have been reported to be of g…