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Magna populations in edge and central region was studied. In 39 A. magna samples and five A. chukar outgroups, the entire mtDNA D loop was PCR amplified. The 456-457 nucleotides of the DNA D loop domain Ⅰ have been sequenced by dideoxy chain termination method. The 16 variable sites(3 5% of the entire sequence) defined 15 haplotypes.

本研究采用聚合酶链式反应和直接测序的方法获得了采自甘肃的大石鸡一个边缘种群和两个中心地理种群共39个个体的线粒体DNA控制区基因456～457个核苷酸的基因序列，16个变异位点(占整个序列的3.5%)有15个单倍型。

A new frequency estimation algorithm for Time Domain Synchronization OEDM system is proposed, which utilizes the time domain circular characteristic of PN sequences to adjust frequency offset and then uses a variable step frequency scan scheme to estimate large frequency offset.

提出一种新的适用于TDS-OFDM系统的频偏估计算法，利用PN序列的时域循环特性进行预频偏调整，然后用变步长扫频进行大频偏的估计，定时同步之后再利用PN的时域循环特性进行细偏估计。

A sliding mode observer proposal has been presented for the multi～variable, nonlinear, strong coupling circular inverted pendulum syst em in this paper.

针对多变量、非线性、强耦合的环形倒立摆系统，提出了一种滑模观测器的方案。

First, the state～space equation of the circular inverted pend ulum system was established based on the Lagrange Equation. On the base of that, the circular inverted pendulum was swung up by the energy control strategy, and the controller of the system was designed by the pole placement of the optimal control theory. Second, in order to realize the observation for the unknown vari ables, stable state observers were designed based on the equivalent principle of sliding mode variable structure.

该方案在采用 Lagrange 函数建立状态空间方程的基础上，利用能量控制策略实现自动起摆；采用最优控制理论中的极点配置法设计倒立摆系统的控制器；同时利用滑模变结构的等值原理设计观测器，实现对系统未知状态变量的观测。

The analysis for free vibration of ring -stiffened circular cylindrical shell with variable thickness was presented.

分析了环肋变厚度圆柱壳的自振特性。

Under the control of microprocessor, this product with an oscillating implement embedded in can produce mulriple-scanning pulse electromagnetic wave with variable frequency and mulriple frequency conversion ultrasonic. Electromagnetic wave can get rid of the pests around electrical wire and ultrasonic can dispel the pests in other areas of the room. The product sends out frequency conversion signal of ultrasonic to circumambience. Once touches objects, it reflects and permeates the room. The combining of the two waves has mulriple effects on the central nervous and hearing system of the pests such as rats, cockroachs, spiders and ants. As a result, the pests would be on the rack and agonizing or even have the symptom of swivet and twitch.

它由完全内置的震荡器，在微电脑的控制下可产生多重扫描变频脉冲电磁波和复合变频超声波，电磁波主要解决电源线周围害虫的问题，而超声波是要消除室内其余区域的害虫，它向周围发射的变频超声波信号，当它碰到物体会反射，从而能充满整个房间，这两种波迭加在一起所产生的双重功效，对老鼠、蟑螂、蜘蛛、蚂蚁等害虫的中枢神经及听觉系统进行多重干扰，令其感到极度不适，恐慌不安，甚至表现出狂乱、抽搐等症状，并能使其丧失繁殖能力，迫使其逃离原地，从而达到驱赶害虫的目的。

CISC processors generally feature variable-length instructions, multiple addressing formats, and contain only a small number of general-purpose

CISC处理器一般产生变长的指令，多种地址格式，并且仅仅有少量的通用寄存器。

CISC processors generally feature variable-length instructions, multiple addressing formats, and contain only a small number of general-purposeregisters.

CISC处理器一般产生变长的指令，多种地址格式，并且仅仅有少量的通用寄存器。

CISC processors generally feature variable-length instructions, multiple addressing formats, and contain only a small number of general-purpose registers.

CISC处理器一般产生变的指令，多种地址格式，并且仅仅有少量的通用寄存器。

Variable-length instructions are more difficult for a chip to process, though, and the longer CISC instructions are especially complex.

可变长度指令让芯片处理更为困难，较长的指令也非常复杂。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。