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The thesis is organized as follows:In Chapter 1,a new partial differential equation model for Spontaneous Potential log in heterogeneous formations is introduced.At the same time,the existence and uniqueness of weak solution to the problem are proved,and the problem of resistance identification in SP log is studied.Furthermore,a jump condition capturing finite difference scheme is proposed and applied to solve such elliptic interface problems.The effects of various factors on SP response,which include objective layers resistivity,bed thickness,bore-hole diameter,invasion and water-flooded zones and so on,are investigated quantitatively by the proposed method, and satisfactory results are obtained.

具体安排如下:第一章首先建立复杂地层中自然电位测井的偏微分方程数学模型,证明了该边值问题弱解的存在唯一性,在此基础上研究了自然电位测井电阻率识别问题:然后发展了用于求解椭圆交界面问题的间断捕捉有限差分方法,利用该方法定量分析了目的层电阻率、地层厚度、井径、侵入带和水淹层等因素对自然电位测井响应的影响,取得了满意的结果。

The application of SL_FNN in global positioning system is proposed in the paper. The problem in the method of circle area call is discussed, and intelligent dispatch method is proposed.

本文讨论了结构学习模糊神经网络在GPS全球卫星定位系统中的应用,讨论了GPS卫星定位系统中园范围呼叫方法存在的问题。

In this thesis, a novel method is proposed to raise the quality of triangular mesh generation. Whereas previous refinement methods mainly focus on inserting a new vertex into the circumcenter of a skinny triangle or tetrahedron, the proposed method is striving to insert a vertex near the geometric center of an effective region.

鉴於前人提出之refinement方法,主要乃以插入形状低劣之三角形外接圆之圆心,以提高网格品质;本文提出一新的思考观点,乃试图插点於其影响区域之中心,以提高其品质。

Thus, evaluation of the minimum zone circle could be solved effectively.Three methods of assessment of roundness error were proposed in this dissertation. Based on the criteria of the minimum zone circle, minimum circumscribed circle and maximum inscribed circle and convex hull, a unified approach was proposed to evaluate roundness error of the minimum zone circle, minimum circumscribed circle and maximum inscribed circle. Evaluation of the minimum zone circle, minimum circumscribed circle and maximum inscribed circle was fulfilled with rotation based the contact pattern. The minimum circumscribed circle and maximum inscribed circle were evaluated with curvature and the curvature circle.

本文提出了三种圆度误差评定的方法:根据最小区域圆、最小外接圆、最大内接圆在极坐标系下的判别准则,利用计算几何中的凸壳理论,提出了一种统一的评定方法,实现了对最小区域圆、最小外接圆、最大内接圆的误差评定;基于接触斑点的检验原理,利用旋转法,实现了最小区域圆、最小外接圆和最大内接圆的误差评定;利用曲率和曲率圆,实现了对最小外接圆和最大内接圆的误差评定。

In this dissertation, firstly, the theories and methods about chaos control and chaotic optimization are studied. Based above, some new approaches for chaos control and chaotic optimization are proposed. Furthermore, the application of chaotic optimization for test generation of combinational logic circuits is investigated in detail, and new methods for test generation are proposed based on chaotic optimization.

本论文在对混沌控制与混沌优化的相关理论和方法进行较为全面、系统的研究基础上,提出了一些新的混沌控制与混沌优化方法,并针对混沌优化与混沌神经网络在组合电路测试生成问题中的应用展开了详细研究,提出了基于混沌优化的组合电路测试生成方法,得到了有价值的成果。

Except that the specifications of the single-objective real-valued quantum-inspired evolutionary algorithm are kept, the proposed algorithm has three main features to enhance the RQIEA. First, the crowed comparison operator is used to sort and select individuals in multi-objective sense. Second, the non-uniform mutation operator is applied to improve the precision for local search and to preserve the convergency for the solutions. Third, the diversity preserve operator is proposed to maintain the diversity.

该算法除保留求解单目标优化问题的实值量子演化算法的特点外,还有三个主要特征:首先,根据多目标优化特点,使用多目标密度比较算子对种群进行排序和筛选;其次,应用非均匀变异算子保持解的收敛性和提高局部搜索能力;再次,使用多样性保持算子来保持解的多样性。

In order to eliminate the influence caused by the nonminimum phase characteristic of a common Boost DC/DC converter, Viswanathan K has proposed a novel tristate Boost DC/DC converter. For enhancing performance, the statespace averaging model of this converter was first presented in this paper. Due to the nonlinear nature in this model, an inputoutput feedback linearization technique was adopted, and a complete controllable linear system was obtained. Then a statefeedback control strategy was designed based on this linear system. Simulation results show that the proposed control strategy can assure constant output voltage in a wide range, so as to realize the stability of the system during large fluctuation of power supply and load disturbance. Good dynamic performance can also be achieved.

针对 Viswanathan K为消除普通BOOST DC/DC变换器的非最小相位特性而提出的三态Boost DC/DC变换器,为进一步提高这种电路拓扑的性能,在建立了变换器状态空间平均模型的基础上,针对其多变量、非线性特点,采用输入输出线性化将其转化为一个完全可控的线性系统,在此基础上应用现有成熟的线性控制策略进行了控制系统的设计,并且采用MATLAB进行仿真验证,结果表明:这种非线性控制策略可以确保输出电压在大范围内恒定可调,且即使存在大范围扰动(输入电压和负载变化均较大)的情况下,系统也可以确保稳定性和良好的动态性能。

The proposed approach is validated to track multi-target effectively by using actual infrared image sequences with complex dynamic background. Experiment results indicate the feasibility and effectiveness of the proposed method.

通过对实际复杂动态背景条件下的红外序列图像进行多目标跟踪和检测实验,验证了所提方法的可行性和有效性。

to reduce the impact of carrier frequency offset in ofdm system,this thesis designs a new carrier frequency offset estimation scheme for ofdm system.the carrier frequency offset estimation includes acquisition and tracking.we adopt variable step size adaptive algorithm.the acquisition range of the proposed algorithm is as large as one half of the overall signal bandwidth.through this method we can not only avoid the feedback by using forward error correction,but also reduce the times of complex multiplication in order to reduce the power consumption of the system.this algorithm not only has low complexity and fast convergence nut also can improve the demodulation performance of ofdm system.computer simulation illustrates the superior performance of the proposed algorithm with regard to estimation accuracy in both awgn channel and multi—path channel.

摘 要:为了减小正交频分复用系统受频率偏差的影响,在ofdm系统中设计了一种新的载波频偏估计算法。频偏估计包括跟踪和捕获两个阶段,文中采用变步长自适应算法来进行跟踪,这个跟踪算法的捕捉范围是整个信号带宽的一半。通过此方法,不但可以利用前向纠错的方式来避免反馈,而且可以缩减复数乘法的次数以降低计算复杂度和系统功耗。该方法运算复杂度低,并具有较好的收敛性,能改善odfm的解调性能。从计算机的仿真效果可以看出无论是在awgn信道上还是在多径信道上都表现出了卓越的性能。

In this paper, using time Petri nets as specification models, system functionality and timeliness are first verified. Then a heuristic algorithm is proposed to optimize the system energy, which is driven by subtasks' energy-gradients and can be further simplified in the case that TPNs are composable. The experimental results show that the proposed methods can support the high-level low-power synthesis of real-time systems with results close to the optimum one, but with very low time complexities.

以时间Petri网为模型,验证系统功能性和实时性,在此基础上,提出了一种由子任务的能耗变化率驱动的启发式能耗优化算法,并针对一类特殊形式的网模型———可组合时间Petri网,设计了相应的简化算法·实验说明,上述算法时间复杂度低,且优化效果接近最优值,能够为实时系统低能耗高层综合提供有力支持

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。