查询词典 symmetry

At the central frequency of the reduced units 0.5(ωa/2πc), when the transmission band of photonic crystaln is completely inside the band gap of photonic crystalmm, both sharing the same central frequency as their symmetry centers, mirror symmetrical photonic quantum well is formed.

针对光子晶体mnm模型，选择适当的结构参数，通过传输矩阵法对其透射谱进行计算模拟发现，在归一化中心频率0.5(ωa/2πc)处，当光子晶体n的导带处于光子晶体mm的禁带中，且两者均以中心频率处为对称中心时，构成镜像对称的光子晶体量子阱结构。

There is an original relationship between traditional hakka residential architecture and the social histories and the regional natural environments at that time. The traditional hakka residential architecture in Meizhou is established on Nature worship, and keep in harmony with natural environments. For examples, the locations of bildings are in line with local conditions; the layouts and styles are usually based on the rule of south exposure and central axis symmetry; the structures lay stress on functions and comfort and harmony with local environments. Unreasonable artificial alteration, for example, cutting slope and building house under the slope are usually triggers landslides, collapses and other geological disasters, and it has become the most dangerous and latent factor to the geological disasters. The ecological environment idea of the traditional hakka residential architecture in Meizhou region has still certain referential significance for modern residential architecture.

实证应用分析研究表明，梅州客家传统民居建筑与当时的社会历史背景、区域自然环境因素之间存在着密切关系；客家民居建筑渗透出尊重自然，与自然环境融为一体的生态环境理念，具体表现为选址上做到因地取舍与回归自然相统一，布局上讲究座北朝南与中轴对称相结合，建筑上注重实用舒适与环境氛围相融合；不合理削坡建房常常诱发崩塌、滑坡等地质灾害，成为地质灾害发生的最大潜在因子；梅州传统客家民居建筑的生态环境理念对现代民居建筑仍然具有借鉴与启示作用。

Based on a low swing, low crossing point current switch driver and central symmetry Q2 random walk pMOS current source layout routing methods, a 1.8V 10 bit 120MS/s CMOS current-steering digital-to-analog converter IP core is implemented in a TSMC 0.18μm CMOS process.

采用低摆幅低交叉点的高速CMOS电流开关驱动器结构和中心对称Q^2随机游动对策拓扑方式的pMOS电流源阵列版图布局方式，基于TSMC0.18μm CMOS工艺实现了一种1.8V10位120MS/s分段温度计译码电流舵CMOS电流舵D/A转换器IP核。

The independent equations of the amplitude spectrum and phase function of orthogonal filter banks were sought through function axial symmetry decomposition and centrosymmetry decomposition technique.

采用函数中心对称和轴对称分解方法分别研究了正交滤波器组间的幅频和相频特性的独立方程。

From the viewpoint of axial symmetry or centrosymmetry between t and t in logic, this paper makes a minute analysis about the negation operation under different conditions in 1-order uncertainty, puts forward negation operation axiom, and does a systematic research on the definition, properties, and generation of negation operation.

从t与t在逻辑上具有轴对称性或中心对称性出发，详细分析了1阶不确定性中不同条件下的非运算，提出了"非"运算公理，系统研究了"非"运算的定义、性质和构造。

As we presented in the paper, with the evolution procedure accomplished of neurons from the single-celled organisms and multicellular animals that lack nervous system, the evolution course of nervous system could be summarized briefly as: Chaos phase, Equally nerve net, Centrilized network phase and Bilateral symmetry, hierarchical organization and cephalization phase.

研究表明，从原始的单细胞有机体类似神经动作电位的协调功能逐步进化成神经元开始，神经系统大致经历了混沌阶段、平权网络阶段、中心化网络阶段和双侧对称的层次体系结构等进化阶段。

This article still further suggests a series of new conception: methods chain, methods embryo, transformation modularity, normalization modularity, symmetry modularity, harmonizati...

本文通过对广义模化的论述，还提出了方法链、方法胚、转化模化、归一模化、对称模化、相谐模化等一系列新概念，并给予初步的说明和解释。

Moreover, With assumption of symmetry on the domain, we show the effect of the domain topology on the number of minimal nodal solutions and give a characteristic of the number of solutions.

进一步，在假设区域具有某种对称性的条件下，研究对称性对极小变号解个数的影响，并给出解的数量的刻画。

We proposed a model independent approach which is based on isospin and flavor SU (3) symmetry to study charmless B decays.

在B介子无璨弱衰变方面。我们提出了一种模型依赖性较小的分析方法。

Numerical simulations show that similar to their counterpart in deterministic nonlinear system some symmetry-breaking bifurcation may occur in the stochastic Duffing-Van der pol system, and Chebyshev polynomial approximation is an effective approach in solving dynamical problems of nonlinear system with random parameter.

数值模拟显示随机Duffing-Van der pol系统与确定性均值参数系统有着类似的对称破裂分岔行为，文中的主要数值结果表明Chebyshev多项式逼近法是研究非线性随机参数系统动力学问题的一种有效方法。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。