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环境估计
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  “环境估计”译为未确定词的双语例句
     Therefore this method can be used in REA widely.
     因此,本法在快速环境估计(REA)中可以得到广泛的应用。
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     This paper presents the results of research on response characteristics of reinforced concrete frame structures subjected to near-field pulse-like ground motions,and on the appropriate seismic ground motion parameters which can be used in damage estimations.
     目的研究钢筋混凝土框架结构在近场脉冲型地震动作用下的反应特性,给出可用于近场环境估计结构破坏程度的地震动参数.
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  相似匹配句对
     The Environment
     环境
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     environment;
     环境;
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     b) a G-M estimator of ω'1α, ω'2β and ω'1α+ω'2β under L (Xβ, Aα; δ21V, δ22U} respectively.
     b)G-M估计
短句来源
     ESTIMATING FOR CAUSALITY UNDER UNCERTAIN ENVIRONMENT
     不确定环境下的因果关系估计
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     Estimation of Position and Velocity of Moving Objects in Multi-Path Environment
     多径环境中目标参量的估计
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  environmental assessment
At the same time, precipitation is the focus of study in meteorology and climatology, ecological environmental assessment, non-point source pollution and so on.
      
Flow Dynamics in the Rybinsk Headwork Tailrace and Its Environmental Assessment
      
EMDS 3.0: A modeling framework for coping with complexity in environmental assessment and planning
      
Environmental assessment in an industrial area of Portugal
      
The Relevance of Participatory Approaches in Integrated Environmental Assessment
      
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This paper deserihes an ada tive ship steering system for trackkeeping. Inthis system, a smplified adaptive filter is designed according to the statisticsof innovation. It can be used to estimate the effect of marine enviroment bymean of test and adjustment of covariance in order to adapt the enviromentalcllange. On the Other hand, it can process the measureirents containingmeasurement errors, and make an estimate of the parameters of stafe, such ascoursc, distance deviating from desired path, and so on. The...

This paper deserihes an ada tive ship steering system for trackkeeping. Inthis system, a smplified adaptive filter is designed according to the statisticsof innovation. It can be used to estimate the effect of marine enviroment bymean of test and adjustment of covariance in order to adapt the enviromentalcllange. On the Other hand, it can process the measureirents containingmeasurement errors, and make an estimate of the parameters of stafe, such ascoursc, distance deviating from desired path, and so on. The application of theadaptive filter evades the faults which occur when using traditional Kalmanfilter foc lack of statestics data. The estimates are used in trackkeeping, and the control law is derived fromminimization of a quadratic perforuence index. Simulating results by computer shew that the adaptive capability of theadaptive filter could overcome the imperfection of the standard Kalman filter,and the estimate and control were of good accuracy.

本文论述一种航迹保持自适应自动驾驶系统。在系统中,设计了一种简单的自适应滤波器。它可根据新息的统计特性,采用方差检验和调整法,对海区环境影响作出估计,使能自动适应海区环境变化,并对受测量误差影响的测量值进行优化处理,给出航向、偏航距离等状态变量的估值。解决了对海区环境估计不足时常规的卡尔曼滤波器性能低劣、甚至滤波发散,使得随机控制系统不能正常工作的问题。滤波结果用于控制,控制律是从使二次型性能指标最小中获得的。计算机仿真的结果明,该系统中滤波器自修改能力克服了常规卡尔曼滤波器对验前统计资料要求过高和应变能力差的弱点。估计和控制亦有相当良好的精度。

In this paper the following problems about adaptability and yield stability of cultivars are discussed: 1. Implication and concept of cultivar adaptability and yield stability. 2. Parameter estimation of cultivar adaptability and yield stability. 3. Questions and applications in their parameter estimation. According to the reference value of mean yield of cultivars or environmental index, the parametcrs may be divided into two categories, cultivar adaptability and yield stability. The question of how to analyse...

In this paper the following problems about adaptability and yield stability of cultivars are discussed: 1. Implication and concept of cultivar adaptability and yield stability. 2. Parameter estimation of cultivar adaptability and yield stability. 3. Questions and applications in their parameter estimation. According to the reference value of mean yield of cultivars or environmental index, the parametcrs may be divided into two categories, cultivar adaptability and yield stability. The question of how to analyse environmental data has not yet been properly addressed and more research is needed with an attempt to find a solution to this statistical problem. A marginal parameter estimation is that a regression coefficient b may be used to measure the cultivar adaptability, a coefficient of correlation γ to measure the reliability. The standard deviation ratio, a_i=si/s may be used to measure the yield stability.

对品种适应性和产量稳性的概念和含义、参数估计及其存在问题和应用作了综述与讨论。以品种平均产量为参照数所估计出的变异系数或标准差比数可看作稳定性参数,以环境指数为参照数所估计出的回归系数可看作适应性参数。如何获得环境估计值问题,还需进一步研究。建议以标准差比数a_i度量产量稳定性,以回归系数b度量品种适应性,以相关系数γ度量b的可靠性。

This paper presents the results of research on response characteristics of reinforced concrete frame structures subjected to near-field pulse-like ground motions,and on the appropriate seismic ground motion parameters which can be used in damage estimations.The behaviors of reinforced concrete frame structures subjected to near-field pulse-like and far-field ground motions are compared.Four main aspects are included in the comparisons:elastic response spectra,roof displacement,story drift ratio and base shear.The...

This paper presents the results of research on response characteristics of reinforced concrete frame structures subjected to near-field pulse-like ground motions,and on the appropriate seismic ground motion parameters which can be used in damage estimations.The behaviors of reinforced concrete frame structures subjected to near-field pulse-like and far-field ground motions are compared.Four main aspects are included in the comparisons:elastic response spectra,roof displacement,story drift ratio and base shear.The comparisons show that there are many differences between near-field pulse-like and far-field ground motions,and the near-field ground motions result in much more demand.A mild decline due to abundant low frequencies is found in the responsive spectra for near-field pulse-like ground motions.It is recommended that the peak ground velocity(PGV) and ground energy density(E() are the parameters that can be used to estimate the damage degree of structures in the near-field environment.

目的研究钢筋混凝土框架结构在近场脉冲型地震动作用下的反应特性,给出可用于近场环境估计结构破坏程度的地震动参数.方法从弹性反应谱、结构顶点位移、层间位移比和基底剪力四个方面,与远场地震动作用下结构的反应进行对比.采用计算地震动参数和结构整体破坏指数相关性的方法研究地震动参数用于结构破坏估计的适用性.结果近场脉冲型地震动和远场地震动有着明显的不同,在前者作用下结构的反应明显增大.得到了各参数与结构破坏程度的相关性.结论近场脉冲型地震动中含有较丰富的低频分量,谱值随周期增大衰减较慢.在近场环境峰值地面速度(PGV)和地震动能量密度(Eρ)可用来较好地估计结构的破坏程度.

 
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