小周期

The converter can be improved just by exchanging the position of the resonant inductance and the transformer such that the transformer is connected with the lagging leg. The improved converter has several advantages over its counterpart, e.g., the clamping diodes conduct only once in a switching period, and the resonant inductance current is smaller in zero state, leading to a higher efficiency and reduced duty cycle loss. The operation principle of the improved converter and the comparison with the original converter are analyzed in this paper. The effect of the blocking capacitor in series with the transformer or resonant inductance is discussed, and a best scheme is determined.The improved converter is adopted to design the DC/DC converter of secondary power supply in HVDC power system.

本文将谐振电感和变压器交换位置，使变压器与滞后桥臂相连，这样箝位二极管在一个开关周期中只导通一次，同时零状态时谐振电感电流较小，有利于提高变换效率和减小占空比丢失，本文分析改进后变换器的工作原理，并与改进前的变换器进行对比，讨论隔直电容在不同位置对变换器工作的影响，确定一种最佳工程方案。

System Brunner evaluation criteria is the smallest, cycle, commercial, rich, and the best.

System Brunner评价尺度是最小的、周期的、贸易的、丰裕的和最坏的。

Using some hypothesis,in this paper,a function of the number of check-verifying times in unit time for safety mornitor systems is presented the extreme functional value by the calculus of variations is evaluated and a mathematical model of check-verifying period with the minimum of check-verifying and losing cost is obtained.

在一系列假设的基础上，给出了安全监测系统单位时间内校验次数的泛函，用变分法求泛函极值，得出了校验费和损失费最小的校验周期数学模型。

Objective To investigate the expressions of cyclinD1 and P27 protein in non-small cell lung cancer and their clinical significance.

目的 探讨细胞周期素D1(cyclinD1)和P27在非小细胞肺癌中的表达及其临床意义。

The theory is cell kinetics and mechanism of drugs.

主要是根据细胞动力学原理和药物的作用机理分析，如果把药物集中应用，一方面只是一过性的杀灭增殖期的白血病细胞，对静止期细胞影响不大，另一方面对正常细胞造成较大损伤，而如果药物作用于几个细胞增殖周期，对白血病细胞进行几个循环的打击，会清除更多白血病细胞，而对正常细胞损伤较小。

The results show that the period-adding bifurcation obeys the deterministic mechanism decribed by Chay model and lightly affected by stochastic factors. In the corresponding parameter region, the integer multiple spiking generates only when the stochastic factors are introduced to the model. The phenomenon is autonomous stochastic resonance.

从模拟实验结果的角度看，加周期分叉过程遵从Chay模型决定的确定性机制，随机因素对其有影响但影响较小；而在相应的参数区间，整数倍节律则是在随机因素驱动下产生，是随机共振现象，是由确定性机制和随机因素共同作用的结果。

Three classes of equivalent system methods which are used in finding high order flight control systems low order equivalent are studied. The first class methods are the classical frequency domain-based equivalent system methods which recommended by MIL-F-8785C and MIL-STD-1797A. Five longitudinal low order equivalent systems and fourteen lateral ones are discussed in detail and some pieces of advice are given. Also conduct an investigation in the time domain-based equivalent system methods .

研究了求取高增稳飞机的低阶等效系统的几种方法：研究了经典的频域等效系统方法，针对纵向5种、横向14种构型的低阶等效系统进行了拟配实践，并提出一些有益的看法；以频域等效系统方法为基础，提出了时域等效系统新方法；以最小二乘辨识为基础，提出了两种纵向短周期低阶等效系统时域辨识方法(等效延迟时间τ_q参与或不参与)。

Read operation to another, the minimum time interval between the operation is one clock cycle.

读操作到另一个读操作之间的最小间隔是1个时钟周期。

This is a rotation of the windmill, by the three major axis and the axis composed of three small windmill, and into a clockwise rotation, the center of the color change cycle.

详细说明：这是一个旋转的风车，由三个大轴和大轴上的三个小风车组成，且成顺时针转动，中心的颜色成周期变化。

Recently, Thellungiella halophila, a close-relative ofArabidopsis thaliana, which is been suggested and be developed as a new salttolerance model plant. Thellungiella halophila is a salt-tolerance crucifer with a shortlife cycle, small genome, and with high sequence similarity(about 90-95% on cDNAlevel), similar heredity characteristics and growth habits with Arabidopsis thaliana.So it is convenience for T. halophila to benefit from a lot of Arabidopsis thalianainformation data.

最近，另一个盐生植物盐芥被提议为研究植物耐盐性的模式系统，它是拟南芥的近缘，为生长周期短、基因组较小、耐盐性较强的十字花科的盐生植物；在cDNA水平上与拟南芥有大约90-95％的同源性，因此，可以方便地将拟南芥的很多信息移至盐芥耐盐性的分子生物学研究；而且，盐芥具有拟南芥很多同样的优点以作为实验系统。

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