variance n. 1.变化,变动,变更;变度,变量;【统计】(平)方(偏)差。 2.(意见等的)相异;不和,冲突,争论。 3.【法律】诉状和供词的不符。 at variance with 和…不和;和…不符 (at variance with the facts 不符事实。His conduct is at variance with his words. 他言行不符)。 set at variance 使不睦,离间。
error n. 1.错误;失错。 2.谬见,误想;误信;误解。 3.罪过。 4.【数学】误差;【法律】误审,违法;(棒球中的)错打。 commit [make] an error 犯[出]错。 correct errors 改正错误。 a clerk's [clerical] error 笔误。 mean errors 标准误差。 a writ of error 【法律】(推翻错误原判的)再审命令。 nature's error 天生畸形。 in error 弄错了的;错误地。 errors of commission [omission] 违犯[疏忽]罪。 fall into error 误入歧途。 nature's error 天生畸形。 adj. -less 无错误的,正确的。
Asymptotic normality of pseudo - ls estimator of error variance in partly linear autoregressive models 部分线性自回归模型中误差方差伪最小二乘估计的渐近正态性
Admissibility of nonnegative quadratic estimators for error variance with respect to restricted ellipsoidal parameter space 椭球约束下误差方差非负二次估计的可容许性
After that , the author focus his attention on the pure sequential confidence for the error variance in linear models 紧接着,作者把注意力转移到线性模型误差方差的纯序贯区间估计。
This paper gived an alternating iterative algorithm , and solved parameters estimation question of math model in the case of unknown error variances , which some linear models with the same parameters with linear inequality constraints , at last , data modeling was done 摘要本文对不等式约束条件下,具有相同参数的多个线性模型的参数,在方差未知的情况下,给出了一种迭代算法,并利用一组随机数据对此算法进行了模拟。
The cyclic estimation approaches of chirp signals in additive nose or multiplicative noise are proposed , it presents a way for the parameters estimation of zero mean amplitude chirp signals . the estimation performances in the additive noise or multiplicative noise are analyzed by the first order perturbation analysis method , and the error variance expressions of the parameters estimation under large samples are derived 针对加性噪声情况及存在乘性噪声的情况,提出了线性调频信号参数的循环平稳估计方法,解决了零均值乘性噪声的信号参数估计问题,并采用一阶扰动分析方法,对两种噪声情况下的估计性能进行了分析,推导出了各参数的估计误差方差公式。
Lastly , the concept of " transient steady state " ( tss ) and its realized approach is put forward , and tss filter ' s error variance is obtained , which provides theoretical reference for the analysis of the tracking performance under the non - linear measurements 最后,基于一维“稳态”滤波器的已有研究成果,提出了非线性观测下滤波器的“暂稳态”概念和实现方法,并推导了状态估计“暂稳态”误差方差的解析表达式,为非线性观测下的目标跟踪性能分析提供了理论依据。
Therefore , a model of three sectors , respectively referring to domestic sector , manufacturing export sector and primary product export sector , has been established here to measure the technology spillover effects of export on domestic sector . finally , based on a broader framework , this dissertation went on to investigate the relationship between openness and china ' s economic growth , while the result shows that though there exists a notable dispute about how to measure the degree of china ' s openness , the index of trade dependence still maintains the better one to reflect china ' s economic openness . in the meanwhile , impulse response function ( irf ) method and forecasting errors variance decomposition ( fevd ) method , both of which are based on the vector auto - regression ( var ) system , are used here to investigate the dynamic relationship between openness and china ' s economic growth 与传统理论不同,新增长理论和新贸易理论都强调技术进步的作用,因此本文构建了一个三部门的技术外溢效应模型(国内部门、工业制成品出口部门以及初级产品出口部门) ,考察了工业制成品出口和初级产品出口对国内非出口部门不同的技术外溢效应;第四,从更加广阔的视野就贸易开放度与中国经济增长问题进行研究,有关贸易开放度如何度量一直是存在较大争议的问题,本文首先对该类研究文献进行了较为详尽的述评,然后运用生产函数方法对所选取的5个贸易开放度度量指标进行了检验,结果发现尽管一些已有研究认为外贸依存度无法真实度量一国经济开放水平,但是本文研究结果表明外贸依存度仍是度量我国贸易开放度的较好指标,进一步采用基于var系统的脉冲响应函数法以及预测误差方法分解法对贸易开放促进经济增长的作用进行了动态刻画。
The same conclusion as derived from the original pda under approximate condition is concluded this way without any approximations . the second method is the instant - state performance prediction based on the hyca method . this method not only gives the off - line recursive error variance relation , but also gets a series of performance measurement such as track life 然后应用两种方法对其进行性能估计和预测,一是基于riccati方程的稳态性能估计,其结果与pda算法近似条件下得出的结论相同;二是基于hyca方法的瞬态性能预测,不仅给出了误差方差的离线递推关系,而且得到了航迹寿命等一系列性能指标的估计值。
Under the background of target tracking in high - density clutter , the calculation formula of the pda algorithm ' s error variance is analyzed and revised firstly , and the modified pda ( mpda ) is derived , which not only improves the tracking performance , but also makes the error variance and the real error of the algorithm match well 针对高密度杂波环境中的目标跟踪问题,首先分析和修正了pda算法中误差方差的计算公式,提出了修正的pda算法( mpda ) ,它不仅提高了跟踪性能,而且使得误差方差与算法的实际误差能够很好地匹配。