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The research work presented in this dissertation cover the characteristics of Time Domain Transient Electromagnetic Field analysis method ,the particular analysis of Pseudospectral time-domain algorithm, the improved or hybrid algorithms of PSTD and it\'s application in high power ultra wide-band technology and photonic crystals design.

本文主要研究了时域瞬态电磁场计算方法的基本特性，对近年来出现的时域伪谱算法进行了详细地分析，提出了多种改进及混合算法，并研究了其在超宽带电磁脉冲技术、光子晶体结构分析等工程问题中的应用。

From the process point of view of the carton box design optimization normally includes the following aspects: first, the material on the carton with process improvement, selection of appropriate materials to production, focused "" five to three; the other is in the efficiency of the process and equipment to learn about existing equipment maximum productivity, production quality of the product, so that different box with the appropriate processes and equipment to produce; third, the design process of process improvement, strengthening the designers and technology staff communication so that the design of the product to be able to give full play to the advantages of enterprise resources; the fourth is to strengthen the carton design-time costs, such as from corrugrted, triangulateration paerboard, and so on through the finishing processes, mainly of the paste, cut shape processed into packaging, and sheathed, and so on, instead of EPS foam, and the use of adhesive paper box instead of nails made of cardboard, prevent moisture transport environment of a nail the appearance of secable and tocommandthe.

从工艺角度优化纸箱箱型安排凡是包含一下几个方背：一是差纸箱配材工艺鼎陈，采取不合的质料来出不销，轻点突不入&五改不一&的收益；二是工艺历程和摆撤的鼎陈，不懂现有摆撤的最不小的出不销本领、出不销不销物的度度境况，使差别的箱型用不合的历程和摆撤来出不销；不一是安排工序的工艺鼎陈，放松安排职员和工艺职员的相同，使安排的不销物没干系充脚阐发企业的资源劣势；第四点不离是放松纸箱安排时不败本的筹算，比如拔取宝瓦楞纸板、边角纸板等通功后道加工工序主给为剥离、焊接不败型等加工不败包拆座、衬垫、护套等，替代EPS泡沫，还有搁置粘合纸箱代庖铁钉纸箱，避免输送洋湿润的境况造不败铁钉生锈带来的表背和搁置上的感化。

Due to the complexity of the cell jitter, the NonSynchronous Tining Recovery methods are currently not mature With the emphasis being given to the Class A CBR traffic, this paper analyzes the performance of the queueing delay and cell jitter at the source node and intermediate nodes, and discusses the Source Timing Recovery at the destination node in ATM networks Firstly, this paper presents a description of the cell jitter of CBR traffic, and gives the definitions of two kinds of cell jitter regarding the Source Timing Recovery for CBR traffic Then, by using exact mathematical models and analysis methods, this paper analyzes the impact of the factors, such as the capacity of the queueing buffer, the randomness, the deterministic nature and the correlation in cell arrivals of the background traffic sources, on the queueing delay and cell jitter performance of the CBR traffic through Statistical Multiplexitng To obtain an insight into the power spectral distribution and look for better schemes for the depression and filtering of the cell jitter, within the analyses we succeed deriving the power spectrum of the cell jitter for CBR traffic Hence, not only the power spectral distribution of the cell jitter can in the frequency domain be qualitatively understood, but also can the rms (root-meansquare) value of the cell jitter be quantitatively obtained so as to more accurately measure the amplitude of the jitter In the end-to-end performance analysis of the queueing delay and cell jitter, we propose a kind of quasi-periodic cell stream model to characterize the jittered CBR traffic, and present an initial queueing analysis of the CBR traffic following such a model at a generic intermediate node Additionally, we briefly discuss the buildout/playout and Source Timing Recovery functions of the destination node Finally, regarding the Source Timing Recovery of CBR traffic, this paper systematically discusses several important principles of the cell jitter filtering and depression reported in the literature, introduces several implementation schemes of the Source Timing Recovery e.

由于信元抖动的复杂性，非同步定时恢复方法目前还很不成熟。本文针对A类CBR业务流在ATM网络源节点和中间节点的排队时延和信元抖动性能，以及在目的节点的源定时恢复问题作了较为全面的研究。首先，文中描述了CBR业务流的信元抖动，并具体地给出了两种与CBR业务源定时恢复有关的信元抖动的定义。然后，采用了精确的数学模型和分析方法，有针对性地分析了业务背景中信元到达的纯随机性、确定性和相关性以及排队缓存器容量等因素对CBR业务流经过统计复用后的排队时延和信元抖动性能的影响。为了了解信元抖动的功率频谱分布和寻求更好的抑制和滤除抖动的方法，在性能分析中，我们成功地完成了CBR业务流信元抖动的功率谱分析，使得不但可以从频域定性地认识信元抖动的能量分布特性，而且还可以定量地求出信元抖动的均方根值(rms：root-mean-square)，以更为准确地衡量抖动的大小。在CBR业务流的多节点端-端排队时延和信元抖动性能分析中，我们提出了一种准周期性(quasi-periodic)信元流模型来描述感染了信元抖动的CBR业务流，并基于这一模型进行了CBR业务流中间节点的初步排队分析。

Light source and the results of other light source measurement vary greatly, D series because of its color temperature of light source in 5000K ~ 7500K, close to the white, the display of passbys in business card printing and membership card production, observation of quadrochromatic class transmissional samples recommended D50 light source, observation business card printing and membership card making products reflecting samples recommended D65 light source.

平源和其它平源丈度的甘休不同很大，D系列的平源因为其色温在5000K～7500K，挨近不黑色，所以其外现性较好，在制卡和会员卡制作产业洋，查察草稿类的透射样本时保举拔取D50平源，查察制卡和会员卡制作品等不直射样本时保举拔取D65平源。

In this paper,the problem of adaptive stabilization of slowly time－varying systems with unmodeled dynamics is investigated in the presence of unknown but bounded disturbances.

研究了含有未建模动态的慢时变系统的自适应镇定问题。考虑的对象具有非最小相位、含未建模动态和大范围时变参数等不良特性，且存在未知但有界外部扰动。

For example, the delay and the unuse it widely are the problems. In this paper, a proxy certificates revocation mechanism is designed based on the Myproxy for grid, which adds the revocation of the proxy to the Myproxy. This mechanism can release the PC by manager of the revocation. When a PC was revoked all of the proxy of it will revoked.

指出了撤消机制存在的延时问题和不容易在网格中应用等问题，根据MyProxy系统设计了一种新的代理证书撤消机制，即在MyProxy系统中增加一个代理撤销层，这个系统允许网格管理系统撤消PC，当一个代理被撤消时，由这个代理所衍生的代理将会同时被撤消。

While detecting the patients with ureterolithiasis, if the width of renal pelvis is 0 mm, it is necessary to measure the width of another kidney and compare with them. If the width of ill renal pelvis is extended by 3 1 mm, the diagnosis of hydronephrosis can be established, then, combining with other signs, such as ureterectasis, the diagnosis of ureterolithiasis can be set up.

输尿管结石所致0 mm肾积水的发生率为 29 47％，超声诊断输尿管结石所致肾积水0 mm时应作两侧比较，当两侧集合系统宽度差别≥3 1 mm时，应考虑肾积水的存在，此时应结合临床、是否合并同侧输尿管扩张、合并结石等情况而作出肾积水的诊断。

When pipeline is running there are great noises in the measured pressure and flow signal due to the diffusion of medium around pipeline and rub resistance, and it is difficult to set the parameters of the adaptive filter for the wide frequency of noise, certainly, thus resulting bad de - noising effect.

在管道运行时，由于管道摩阻、周围介质扩散等影响，使得测得的压力与流量信号带有很大的噪声，当噪声频率很宽时，自适应滤波器的参数设置比较困难，致使去噪效果不明显。

CAD/The CAM technology development, enables in the numerical control processing to become directly using the CAD design data possibly, specially the microcomputer and the numerical control engine bed joint, causes the design, the craft plan and the programming entire process completes completely on the computer, does not need to output the special technological document generally.

加工表面粗糙度要求低时，vF 可选择得大些。在加工过程中，vF 也可通过机床控制面板上的修调开关进行人工调整，但是最大进给速 www.3722.cn (整理。版权归原作者所有)如果您不是在 3722.cn 网站下载此资料的，不要随意相信。请访问3722，加入 3722.cn 必要时可将此文件解密度要受到设备刚度和进给系统性能等的限制。

The simulation results of the cylinder-block model were given in the article, consistent with that of Middlemen"s. It was shown that the block part could improve the uniformity of the flow distribution. The analysis of the flow field of some materials with different power-law factor in the die designed by Mckelvey was close to that of Mckelvey"s. It was shown that the flow distribution was uniform in the die that can producesheets with 1200mm in width. During the analysis the flow channel was divided into several parts to get the details about the fluid flow in each area. A conclusion was drawn after analyzing the influence of the die pressure on the flow distribution, that the higher pressure is good for the output and bad for the uniformity of the distribution. Simulation of the die applying the cylindrical main runner showed the fact that when the cylinder replaced the cone the change of uniformity was trivial. The uniformity of the non-block flow channel was so poor that the block in the proper position of the die channel was necessary. The project of the die for the wider sheet was put forth, and the analysis of the fluid flow in the die was shown.

本文模拟了圆柱管缝隙流模型的三维流动场，得到了与Middlemen结论一致的流动均匀性，并通过模拟直观地展示了采用阻尼块可以改善挤出均匀性的现象；分析了多种幂率指数的流体在Mckelvey等人设计的流道模型中的流动分布，得到了与Mckelvey的分析结果接近的压力降和流量偏差；本文建立了1200mm幅宽机头流道的三维有限元模型，并逐个分析各个区域和多个截面的流动分布状况，由此揭示了1200mm幅宽L-型机头流道内的流北京化工大学硕士学位论文动分布基本均匀，并在分析了机头压力对于挤出流动分布的影响后得出结论：较高的机头压力可以获得较大的产量，但是不利于物料均匀分布；模拟了采用圆柱管主流道时机头流道内的流动分布，得出结论：主流道由圆锥管改为圆柱管时对流动均匀性影响不大，通过设置适当的阻尼仍然可以达到挤出平衡；模拟了两端进料式圆柱管无阻尼流道的流动均匀性后得到结论：两端进料式无阻尼结构的流动均匀性较差，宽机头中仍然有必要设置阻尼块；确定宽幅机头流道的基本方案，并设计了一种宽幅防水卷材挤出机头流道的结构，通过流动模拟表明该种结构的流动均匀性较好；考察了宽幅机头对于不同厚度片材的挤出适应性，得到结论：当生产不同厚度的片材时，阻尼块高度需要调整。

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 。