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MIL-HDBK-762, MILITARY HANDBOOK: DESIGN OF AERODYNAMICALLY STABILIZED FREE ROCKETS (17 JUL 1990)., This chapter introduces the handbook. Rocket systems are presented in two broad classes: military rocket systems and research rocket systems. Military rocket systems are discussed in terms of their application in a battle environment. Research rocket systems are discussed in terms of the application to provide the means of placing data gathering equipment into a desired environment. Operational modes for the rocket systems are described. Finally, brief descriptions of the remaining chapters and the appendices are given. Aerodynamically stabilized free rockets offer relatively simple, reliable, small, low-cost means for delivering payloads and, when great accuracy is not required, are often the optimum systems. This handbook provides engineering design information and data for such rockets. Primarily, this handbook is intended to cover the conceptual and preliminary design phases; however, reference is made to the technical approaches and computer programs required for the system development phase. The material includes operational and interface requirements as they influence the design of the total weapon system. The handbook provides 1. The preliminary design engineer with specific design information and data useful in the rapid response situations required of preliminary design activities 2. The specialist in each technical area an introduction to the other disciplines in terms of data requirements and trade-off studies that must be performed. Free flight rockets are those rockets that do not have an in-flight guidance system; they are aimed, guided, or directed by the launching device. These launchers usually have a launching rail or tube to provide initial direction to the rocket. Free flight rockets are of two basic kinds?spin stabilized and aerodynamically stabilized. The spin stabilized rocket, as the name implies, depends upon a high rate of spin and resulting gyroscopic moments to oppose disturbances. The aerodynamically stabilized rocket depends upon aerodynamic forces on the body and fins to oppose disturbing forces. The aerodynamically stabilized rocket generally employs some spin to minimize dispersion caused by nonsymmetrical body characteristics (body asymmetries, fin misalignment, thrust misalignment, etc.). The data and concepts presented in this handbook are limited to aerodynamically stabilized free flight rockets.【英文标准名称】:Soilquality-Guidanceonthedeterminationofbackgroundvalues(ISO19258:2005)EnglishversionofDINISO19258:2006-05
【原文标准名称】:土壤质量.基本值测定指南
【标准号】:DINISO19258-2006
【标准状态】:作废
【国别】:德国
【发布日期】:2006-05
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:分析;基本值;土壤组分;数据分析;数据收集;数据处理;定义;指导手册;无机材料;最低要求;有机物质;参数;质量控制;抽样方法;土壤分析;土壤;统计数据;统计方法分析;水常规
【英文主题词】:Analysis;Basicvalue;Compositionoftheground;Dataanalysis;Datacollection;Dataprocessing;Definition;Definitions;Guidebooks;Inorganicmaterials;Minimumrequirements;Organicmatters;Parameters;Qualitycontrol;Samplingmethods;Soilanalysis;Soils;Statisticaldata;Statisticalmethodsofanalysis;Waterpractice
【摘要】:ThisInternationalStandardprovidesguidanceontheprinciplesandmainmethodsforthedeterminationofnaturalorusualbackgroundvaluesforinorganicandorganicsubstancesinsoils.Itgivesguidanceonstrategiesforsamplinganddataprocessingandidentifiesmethodsforsamplingandanalysis.Itdoesnotgiveguidanceonthedeterminationofbackgroundvaluesforgroundwaterandsediments.
【中国标准分类号】:Z18
【国际标准分类号】:13_080_05
【页数】:30P.;A4
【正文语种】:英语