单元

Taking the high precision on chip RTC as the time base control unit and using genetic algorithms to search the best OSCCAL register value, it will make the on chip RC oscillator generate a high precision clock for the MCU. This methord can be used fast and real time, so the CPU will get a stable clock source.

以AVR片内高精度时钟单元RTC为时基控制单元，以标准时间内MCU定时器的计数值为控制目标，采用遗传控制策略搜索对应MCU理想时钟频率的OSCCAL寄存器最佳设置值，快速、准确地对RC振荡频率进行校准，为CPU提供具有高抗干扰特性的精确时钟。

So, based on research on agroforestry system and structure optimization technology, this paper gives a theoretical and quantifiable study on structure optimization of agroforestry system on scales of among or in land cell, aspects including selection of species, dimension optimization, topological structure optimization and evaluation.

为此，本文在综合国内外农林复合系统研究以及结构优化技术研究的基础上，在土地单元间和土地单元内两个尺度上，植物材料选择、尺寸结构优化、拓扑结构优化以及优化模式评价四个层次，对三峡库区的农林复合系统结构优化进行了理论以及定量研究。

It will consume lots of CPU time and hard disk space of computer in calculating the ultimate torsional moment of a hull girder by using FEM, especially for the complex structure. The ultimate torsional moment of box thin-walled beam is analyzed by using finite element method. The influences of different characteristic parameters on the ultimate torsional strength are extensively studied.

在船体梁扭转极限承载能力的有限元计算中，对於比较大而且形状复杂的结构，需要采用足够多的单元数来模拟其真实的破坏模态，因而会耗费大量的CPU计算时间和硬盘空间，并且往往因为单元数太多而使数值计算变得不现实。

After doing that, the paper points out the universal architectures of the high-speed real-time signal processing system and describes how to implement them.. Since FFT plays an important role in digital signal processing, implementing FFT with FPGA is presented and the total realization graph is designed. For improving speed and decreasing computing complexity, high efficiency multiplier algorithm is used to realizing twiddle factor multiplier of butterfly processing unit.

最后本文描述了数字信号处理系统结构的实现方法，指出常见的高速、实时信号处理系统的四种结构；由于FFT算法在数字信号处理中占有重要的地位，所以本文提出了用FPGA实现FFT的一种设计思想，给出了总体实现框图：重点设计实现了FFT算法中的蝶形处理单元，采用了一种高效乘法器算法设计实现了蝶形处理单元中的旋转因子乘法器，从而提高了蝶形处理器的运算速度，降低了运算复杂度。

Use the finite element software ANSYS to make model for consecutive strands and unbonded prepressed concrete lining. Build the reciprocity relation of the cells in consecutive strands and cells in RC, analyse the stress and transmogrification of consecutive strands and RC to make sure the design parameter can meet the need of specification.

2采用有限元分析软件ANSYS，分别对无粘结预应力衬砌方案的预应力钢绞线和钢筋混凝土衬砌单独建模，预应力钢绞线的单元节点与钢筋混凝土单元间通过约束方程法建立起相互作用的关系，分析钢绞线和钢筋混凝土衬砌的应力和变形，计算结果表明确认采用的设计参数能够满足规范要求。

This paper proposes a class of Quasi-Cyclic Low-Density Parity-Check codes with high code rates, which is an efficient encoding algorithm due to the almost lower triangular form and simple structure of their parity-check matrices.

摘要该文设计了一种特殊的高码率准循环低密度校验码，其校验矩阵以单位矩阵的循环移位阵为基本单元，与随机构造的LDPC码相比可节省大量存储单元。

In the second chapter several new concepts of elasto-plastic fuzzy stiffness and element are proposed. The fuzzy element matrixes corresponding to the elasto-plastic fuzzy element are also established. In order to use the bilinear and trilinear restoring force modles on analysis seismic responses of structures. A fuzzy mathematical method for dealing with the critical points of the restoring force curve is proposed too.

第二章针对结构在地震弹塑性分析中的刚度模糊性，提出了模糊刚度的概念，并进一步对平面和杆系的弹塑性问题提出了弹塑性模糊单元的概念，建立了相应的模糊单元刚度矩阵；为了利用现有的折线恢复力模型，并且更好地反映结构刚度的过渡性，还给出了用模糊数学处理折线恢复力模型刚度折点的方法。

In the meanwhile, we also found that compounds being connected by OXD rings, electronic coupling between the ferrocene and triphenyl amine could be prevented by using OXD ring as connecting unit.

同时，我们也发现，化合物若以OXD环为连接基团，不但可以阻隔二茂铁单元和三苯基胺单元的偶合作用，使得分子可以利用电化学的方法形成电聚膜。

Also present in sugar beet extract are a trisaccharide, raffinose, which has a D-galactopyranosyl unit attached to sucrose , and a tetrasacchtride, stachyose, which contains another D-galactosyl unit.

制糖甜菜的提取液中还存在一种三糖，即棉子糖，它有一个D-吡喃半乳糖单元与蔗糖相连接；另外还存在一种四糖，即水苏糖，它含有另一个D一半乳糖单元。

It also allowed a range of adjustment to taste in the level of the tweeter and worked well with slight errors in acoustic offset of the drivers, allowing for some leeway in tweeter mounting.

它也允许了一系列调整口味，在水平的音单元和运作良好，轻微的错误声抵消的司机，让一些余地，在音单元安装。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。