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试验周期的英文

  • test period

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  • 例句与用法
  • Reciprocating internal combustion engines - exhaust emission measurement - part 10 : test cycles and test procedures for field measurement of exhaust gas smoke emissions from compression ignition engines operating under transient conditions
    往复式内燃机.废气排放测量.第10部分:压力点火燃式发动机在瞬时工作状态下排放的燃气烟雾现场测量的试验周期和试验程序
  • Reciprocating internal combustion engines - exhaust emission measurement - part 9 : test cycles and test procedures for test bed measurement of exhaust gas smoke emissions from compression ignition engines operating under transient conditions
    往复式内燃机.废气排放的测量.第9部分:瞬间条件下工作的压缩点火发动机废气烟雾排放的试验床测量的试验周期和试验程序
  • The test quantum is generally small due to the extremely complexity of modern weapon systems , high expenses and long cycle of the tests , which makes the demonstration methods of gjb more difficult to be put into practice
    由于现代武器装备系统复杂,试验费用昂贵,且试验周期长,因而现场试验的次数往往比较少,而国军标中的方法需要较多的试验样本量,使其在实际工程中难以应用。
  • The latter will be given options and allowed time to try them out , which is long enough for at least one test interval . people will not jump rashly to the conclusion that something must be wrong out there , and the experimenters will not be under pressure . such experimental fields are meant to find out where shortcomings are and what can be done as a remedy
    在试验田里大家包括媒体允许试验者出错,给他建议给他时间,而这个时间一定是一个试验周期的时间,看官千万不要一语定性,加以否定,造成试验者承受巨大的舆论压力,因为开辟试验田就是以找出不足,加以改进为目的的。
  • Aero - elastic model tests have a long test period and cost much , high frequency force balance technique can only consider the foundational vibration type of the structure and it must be assumed as linear . because this technique can not get the average wind loads on each floor of the building , it can not give the equivalent design loads of structures
    在现行的风洞试验技术中,气动弹性模型试验模型制作复杂、试验周期长、费用高,而高频底座天平试验则只能考虑结构的基阶振型并假定其为线性,且由于只能测得基底倾覆弯矩,无法测量各层的平均风荷载,故而无法确定结构各层的等效设计荷载。
  • Abstract : in this paper the application of orthogonal test method in machinework was introduced , using orthogonal test method can reduce the testing time , knowing how the parameters influence the workings , acquire the best machining condition , and give direction for the better condition
    文摘:本文通过实例简要介绍了正交法在机械加工试验中的应用,利用正交法进行试验研究,可以减少试验次数,缩短试验周期,了解各种因素对指标的影响程度,获得最优的生产条件,同时,也为进一步探求更好的条件指明了方向。
  • Theoretical models were used to predict the effects of microcrack - density to effective tensile modulus of cf / ep laminates for long - term duration exposure for it difficult to get from tests . a uniaxial zero - expansion model was established based on the analysis of thermal stress and the coefficient of thermal expansion of the laminates
    由于受到试验周期的限制,对于长期暴露于空间环境中的层合板材料,其有效拉伸模量很难用试验方法直接测量,本文采用理论模型进行分析。
  • The modern robust design detailed the robust design based on engineering model , which explained the specific design process , the whole process from founding system model to solving it . it obtained the optimum combination of parameters and the maximum manufacturing errors , using fuzzy comprehensive judgment to dispose the problem of many targets , handling the design results by fuzzy probability to increase the reliability of the design . in the end , there supplied an example , the optimization design of a long distance hydraulic cylinder to interpret the specific design process , achieving its optimum combination and the maximum manufacturing errors , and verifying the practicability of the design results by the method of fuzzy probability analysis
    在第二部分的基于试验设计的稳健设计中,先对传统的稳健设计,即三次设计(功能设计、参数设计及容差设计)的设计过程及原理进行了分析,指出了传统稳健设计法中的不足,即没有充分利用数字计算机的强大优势;对于多因素多指标的设计,试验周期长、计算复杂等造成设计周期长、成本高、效率低等缺点提出了改进的措施,即将虚拟现实技术应用于传统的稳健设计中,通过模糊数学的方法(模糊综合评判)来处理设计中的多指标问题,使设计达到事半功倍的效果。
  • At the meantime , the rock mass may alternate between loading and unloading and it exists in certain kind of liquid , such as surface water , unconfined water , confined water etc for its intrinsic crannies . the practical rock mass concerned project must solve the key stability pr oblem after the understanding of the complicated mechanical characteristic and the deformation trends to guide the following project design and construction for the demand of security , economy , feasibility and validity . however , the intrinsic nonlinearness and complexity of the engineering rock mass become the main difficulty to predict the stability and deformation , the corresponding structure design must ensure enough safety with all the determinate or random force combination , so a model without the geometry distortion and constitutive equation warp is necessary to be built for the quantificational analysis of practical structure ' s stress , for the simulation of the real process and for the determinate evaluation system and optimization
    由于实际工程岩体其固有的非线性和复杂性,使得求解对应的诸如其稳定性、变形等问题面临较大的困难,而有关的工程结构的设计必须保证该结构在外来因素的作用下具有足够的安全度、经济性和合理性,这必然要求对岩体及其工程结构的受力与变形有一套量化评判体系和优化技术,抓住实际工程问题的本质特征并建立可行的符合几何仿真、本构仿真、受力仿真、过程仿真四原则的求解模型,通过该模型的数值模拟成果来指导岩体工程的设计、施工及运营、管理;而岩体结构面的存在使得基于传统连续介质力学理论的理论分析和数值模拟面临巨大的挑战,物理模拟的试验周期和成本也大大增加,而岩土体工程问题则成为典型的数据有限、了解程度有限类问题,这类问题的解决需要综合应用理论分析、经验判断、物理模拟和数值模拟等方法,数值模拟可以完成目前许多技术手段无法完成的实验,如参数控制,复杂条件下的边界条件的处理,同时数值模拟具有高可重复性,且数值模拟的成本和人力开销等远低于物理模拟,因此研究岩土体工程问题的流形元数值模拟方法是一项具有理论和实际工程应用价值的重要课题。
  • But due to time limit and fund factor of foundation pit project and because test condition is hard to control , and due to test needs much fund and takes effect slowly , field in - situ test that is important to information design and construction is difficult to do . as effective research means , laboratory model test is used due to the following reasons : low cost , short test period , easy to do , test parameter flexible selected and easily to control
    但目前由子基坑工程工期、资金等诸多因素的限制,对信息化设计与施工有重要作用的现场原型试验因试验条件不易控制、投资大且见效慢而难以实施。室内模型试验因成本低、试验周期短、难度小、参数选择具有可控性和灵活性等优点被作为有效的研究手段。
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