查询词典 second base

Thesis and mainly discuss the following problems:What we mainly discussed in the second chapter as follows:(1) S1,S2 are sets of symmetric orth-symmetric matrices;(2) S1,S2 are sets of bisymmetric matrices;(3) S1,S2 are sets of anti-symmetric orth-anti-symmetric matrices;(4) S1,S2 are sets of bi-anti-symmetric matrices;(5) S1 is the set of symmetric orth-symmetric matrices, S2 is the set of anti-symmetric orth-anti-symmetric matrices;(6) S1 is the set of bisymmetric matrices, S2 is the set of bi-anti-symmetric matrices;(7) S1 is the set of anti-symmetric orth-anti-symmetric matrices, S2 is the set of symmetric orth-symmetric matrices;(8) S1 is the set of bi-anti-symmetric matrices, S2 is the set of bisymmetricmatrices;On the base of studying the basic properties of the matrices, the expression of solutions and some numerical examples are presented.

本文第二章将主要就上述问题讨论如下几种情况： 1.S_1，S_2为对称正交对称矩阵； 2.S_1，S_2为双对称矩阵； 3.S_1，S_2为反对称正交反对称矩阵； 4.S_1，S_2为双反对称矩阵； 5.S_1为对称正交对称矩阵，S_2为反对称正交反对称矩阵； 6.S_1为双对称矩阵，S_2为双反对称矩阵； 7.S_1为反对称正交反对称矩阵，S_2为对称正交对称矩阵； 8.S_1为双反对称矩阵，S_2为双对称矩阵。

In the second part, the supported mesoporous sieve solid base KNO_3/MCM-48 and KAc/MCM-48 were prepared. And it was the first time that KNO3/MCM-48 and KAc/MCM-48 were used as catalysts for the synthesis of dipropyl carbonate by transesterification of propanol and dimethyl carbonate.

第二部分研究了负载型KNO_3/MCM-48和KAc/MCM-48固体碱的的制备，并首次将这类催化剂应用到丙醇和碳酸二甲酯酯交换法合成碳酸二丙酯的反应中。

For the models by MMFI is a nonlinear differential equation with variable coefficients and the 'nonlinearity' brings discommodiousness to analyse the nature and quantification of a control system, it applies brim linearization method to better MMFI. By transforming 'triangle wave' membership functions of the base elements into 'rectangle wave' membership functions, we get three models which represent different aspect respectively. By simulating second order system and analysing the errors of the results, a conclusion is drawn, that is, the model obtained by brim linearization method has a good precision in contrast with the real model.

由于模糊推理建模法得到的模型是变系数非线性微分方程，这种&非线性&对该控制系统的某些定性或定量分析带来不便，因此应用边缘线性化方法对模糊推理建模法进行改进，将基元的隶属函数由&三角波&改成&矩形波&，从而得到了三个模型，这三个模型各有侧重，通过对二阶系统进行仿真，分析仿真结果，从而给出了关于边缘线性化方法的结论，即由边缘线性化方法得到的系统模型对该系统的真实模型有较高的逼近精度。

By time-varying filtering, we realize the signal selectivity and interference suppression, especially for the signals with time-varying power spectrum. It is shown herein that conventional eigenstructure based methods are lower dimensional special case of the time-frequency subspace fitting method. The closed-form array response estimation algorithms for blind source separation in wireless communication is also developed in the dissertation by exploiting the data structure of second-order statistics of the array output in the presence of multipath. The proposed method achieves array response estimation with little constraint on signal property and propagation environment such as scatters or angular spread. Moreover, the array utilized here can be of arbitrary geometry and even uncalibrated. Since the closed-form solution is obtained, no misconvergency may occur and large amount of computation can be saved. The equivalent feed model and corresponding optimization designation are proposed to realize the downlink multi-user selective transmission. By coherent and non-coherent superposition of the electromagnetical field, multiple beams can be formed using a single array, so that each co-channel user signal is transmitted in each beam and will not interfered with each other. The proposed system scheme implements the digital beamforming and the channel allocation in the base band, therefore is suitable for the utilization of the radio software technology. The feasibility and effectiveness of the proposed model are proved by the RF experiment.

在窄带条件下，GSC－SSF方法还可以提高阵列的虚拟孔径，从而提高估计的性能；可以证明，Cyclic DOA 和SC-SSF方法可看作该方法的特例或近似； 3、提出了二维GSC－SSF方法和宽带谱相关DOA矩阵方法，利用信号的循环平稳特性解决了宽带条件下二维 DOA 估计问题，并具有阵元数少、计算量较小的特点； 4、提出了时频子空间拟合和宽带时频DOA估计算法，将联合时频分析的理论和方法引入到阵列信号的空间谱估计研究中，利用时变滤波实现信号选择性测向和干扰抑制，特别适合于谱时变信号；可以证明传统特征结构法可看作是时频子空间拟合方法的特例； 5、提出了多用户环境下阵列响应的估计方法——CARE方法，该方法对信号结构和传播参数（主要是散射源分布与角度散布）的约束较少，适用于各种几何结构的阵列甚至未校准的阵列，能够直接得到阵列响应的闭式解，因此计算量小、稳健性好，不存在收敛问题； 6、提出了针对多用户下行选择性发送的阵列等效激励模型、优化设计方法及其系统实现方案，通过空间场的相干叠加与非相干叠加使得单一阵列能够形成多个波束，并保证各波束内的用户信号各不相同且相互干扰最小；其系统方案具有在基带实现数字波束成形、信道分配并便于软件无线电实现的特点，其有效性已得到外场实测数据的证实。

The second part explains the classical comparative advantage theoryand competitive advantage theory on international trade which includes: Adam Smith's theory of absolute interests、 David Ricardo's comparative advantage theory、 the Theory of natural resources gift raised by Hekexieer and Elian , Leontief Paradox and competitive advantage theory (based on the industrial perspective, the resource base perspective, the dynamic capacity perspective), so as to provide a theoretical basis cement engineering services for the analysis of international enterprises.

第二部分，对有关国际贸易的古典比较优势理论和竞争优势理论进行了阐述，主要理论包括：亚当·斯密的绝对利益理论、大卫·李嘉图的比较优势理论、赫克歇尔和俄林的资源禀赋理论、里昂惕夫悖论以及竞争优势理论（基于产业组织视角、资源基础视角、动态能力视角）等，从而为水泥工程服务企业国际化分析研究提供理论基础。

The second, It established the base mode of virtual course for-property management enterprise and possessed exercisable actualoper-ation.

第二，初步建立了物业管理企业虚拟化的运作模式，并具有实际操作的可行性。

Inflorescences fascicled cymes on second year branchlets or scattered at base of new branchlets.

花序簇生聚伞花序在第二年小枝或星散的在新小枝的基部上。

Having reviewed both domestic and international dissertations about resource pricing theories, compared domestic with foreign practices, stepped on the base of domestic realities, the author of this dissertation analyzes the pricing system of mineral resources both from theories and from its practices:First, analyzed China's current governmental pricing system and its effect on the market, and found some regulation problems such as inadequation and excession. Second, compared different mineral resources pricing methods and its effects on the market, and suggested new mineral resources pricing system for China. Third, raised some suggestion on how to regulate and manage through government administration in this new pricing system.

论文中借鉴国内外成熟的资源定价理论，对比国外通行做法，立足于国内实际，从理论和实践两方面对矿产资源的定价体系进行研究：一是分析了现行中国矿产资源政府行政定价的制度及其对市场的影响，找到部分调控影响不到、不力或过度的问题；二是比较了国内外现行不同的矿产资源定价体系及其对市场的影响，提出了适应我国经济社会发展的新矿产资源定价体系；三是科学地提出了我国在应对未来资源提价过程中如何合理发挥政府调控手段的建议。

Second, the acid-promoted lactonization was abandoned in favor of a strong base protocol, thereby eliminating the modest decomposition, presumably arising via loss of the TBS groups in both the starting material and the lactone.

其次，酸内酯被提拔强烈主张废弃基地协议，从而消除了适度分解、经产生的损失大概在TBS的团体和内酯原料。

The second phase of mind control development was refined at an underground base below Fort Hero on Montauk , Long Island and is referred to as the Montauk Project.

第二阶段的精神控制开发在纽约长滩曼托克的英雄炮台下被秘密加工，被称为曼托克工程。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了