查询词典 environments

The common method, that all strong-correlation terms of the model are eliminated, can bring the loss in the engineering application, so the new method is proposed that the identified model reserves some correlation. The augmented matrix A is constructed by the outputΔW and the matrix S. The"determinating order based on ratio of determinant"is brought out to screen the strong-correlation terms in the structure identification. The latent root estimation is improved in screening the eigenvalues and eigenvectors. Thus the estimation precision is improved greatly.The consistence check of guidance instrument error coefficients of flight test and ground test is the purpose of flight experiment. The causes of inconsistency of the two models are analyzed. The hypothesis test of linear regression model based on F statistics is proposed to check the consistence.Finally, the instability of error coefficients is probably caused by the change of the flight environments, therefore, the relation between the error coefficients and flight environment is analyzed. The approach is presented to identify SINS guidance instrument error models and compensate the error in the segmented sections corresponding to the change of vertical acceleration of aircraft.

在结构辨识中，常用的方法由于将模型中的强相关项全部剔除而给工程应用带来损失，因此，本文提出了新的有益思想，即在保留一定相关性的基础上进行辨识：将输出向量ΔW与环境函数矩阵S构成增广矩阵A，然后采用"比定阶行列式"来剔除相关向量的方法，这样既可以尽可能多地保留了对落点影响大的强相关参数，又可以对落点影响小的强相关参数给予剔除；在参数估计中，改进了特征根估计中特征根和特征向量的筛选方法，提出"近零"准则，从而大大提高了参数估计的精度；再者，鉴于天地模型"一致性"检验是飞行试验和SINS制导工具误差系数分离的主要目的，因此，本文又深入分析了造成天地模型不一致的原因，提出了采用基于F统计的线性回归模型假设检验方法来进行捷联制导工具误差模型的天地"一致性"检验；最后，鉴于飞行环境剧烈变化可能会对惯性仪表误差系数稳定性带来一定的影响，因此本文深入地分析了SINS制导工具误差系数与外界环境的关系，提出了基于过载变化大小的分段辨识和分段实时补偿的算法。

The team has chosen two very different alien environments in which to place their extraterrestrials, aurelia and blue moon.

为此，研究小组选择了两个完全不同的环境作为外星生物的"家"。它们分别是"奥里里亚"和"蓝月亮"——由计算机模拟出的两个可能在银河系中存在，并可能孕育生命的外星天体。

For the creation of virtual objects and virtual environments, we will study the construct of an authoring system which includes environment definition and environment management, so that the properties of autonomy, interaction and presence can be properly defined and realized.

在建构方面将研究适当的描述系统以便描述虚拟环境及虚拟物件并使其具有自主、互动及实存之特性。

Context Dependent Memory in two natural environments: On land and underwater. J BR Psychology 66 Godden and Baddeley, 1975

在两种自然环境下：地上和水底，依靠情境的记忆表现〉《英国呼吸心理学期刊》 66 Godden and Baddeley，1975

In this paper, an extended divide and conquer algorithm is intended proposed, which is for solving the real symmetric band generalized eigenvalue problem under distributing environment Eigenvalue partition theorem is presented and proved Based on divide and conquer by extension, this algorithm computes generalized eigenpaires of symmetric band matrix pencil by bisection and generalized Rayleigh quotient iteration Theoretic analysis and numerical results show that this algorithm is better than the classic software package LAPACK when bandwidth is small and the scale is large Combined with multisection, which has good parallelism, it got good effects under distributed environments

提出了分布式环境下计算对称带状广义特征值问题的一种扩展分治算法，给出了特征值分割定理及其证明算法在扩展分治的基础上，利用二分压缩结合广义Rayleigh商迭代计算广义特征对理论分析和数值实验表明，对于窄带宽大规模的广义特征值问题，该分治算法明显优于LAPACK软件包结合并行性好的多分法，在分布式环境下获得了很好的并行效果1 引言本文研究了对称带状广义特征值问题Ax =λBx ( 1)的并行计算，其中，A ，B均为半带宽为r的n阶实对称带状矩阵且其中之一是正定的本文总假设B是正定的求解此问题有两种传统方法，第1种方法是通过计算矩阵B的Cholesky分解，将问题( 1)转化为标准特征值问题[1～3] ，进一步

The other problem is that villages and cities eroded the marsh, which had a baneful effect on environments.

而环境恶化其中另一重要因素为"自然之肾"--湿地的消失。这其中也有聚落、城市的"功劳"。

The concrete cover depth is a basic variable to make durable reinforced concrete structures in atmospheric environments.

混凝土保护层厚度是大气环境中钢筋混凝土结构耐久性设计的重要参数之一。

It is expected that probes in benign environments may last for a very long time.

期待在良好的环境下探测器可以持续更长的时间。

The Bhutanese quickly learnt that in the pursuit of economic prosperity, many countries had lost their cultural identities, as well as their spirituality, and 6 compromised their environments.

不丹人很快认识到，在追求经济繁荣的过程中，许多国家丧失了自己的文化身份以及精神特性，并牺牲了自己的环境。

But the problem is that today's environment has undergone earth-shaking changes. Not only natural environment has undergone great changes but cultural environments also has bided farewell to the past tradition.

可问题是今天的环境已经发生了翻天覆地的变化，不仅自然环境变了，人文环境也已经告别了过去的传统。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。