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Cities are the consequences of productivity development. The swift and violent development of productivity has continuously enlarged their scope, density of population and economic intensiveness, thus produce more factors in causing urban disaster and result to more and more losses.

城市是生产力发展到一定阶段的产物,生产力的迅猛发展促进了城市规模的不断扩大,人口的密集性和经济的密集程度愈来愈高,形成和引起灾害的因素增多,造成了城市灾害的损失也愈来愈大。

The results show that small world network model could explain the big change of intensiveness and connectedness in forming process. And individual selection value function could explain the stable intensiveness, connectedness in growing and mature process. Combined the both, the characteristics of the whole process could be reflected.

研究表明,小世界网络模型模拟的集群网络具有集群形成期网络整体密集性和连通性剧烈变化的特征,而个体选择价值函数模型可以解释集群网络的成长期、成熟期的密集性和连通性趋于稳定的特征,将2种演化规则相结合,则可以反映集群网络从形成期到成熟期的各生命周期特征。

In this paper a hierarchical optimized memory method, which combines the SAS scheduling sequence with Non-SAS scheduling sequence, is proposed to solve the optimized memory problem. In the method, data dense sub graph and strongly connected sub graph are defined for data dense structures and loops, and by the principle of consuming tokens first, a Non-SAS heuristic algorithm is designed for optimized memory of these sub graphs.

文中提出了将SAS和Non-SAS类型调度算法相结合的层次化的存储优化方法,定义了数据密集分量和强连通分量来描述环和数据密集处理结构,并依据数据优先消耗原则设计了启发式的Non-SAS调度算法对分量进行存储优化。

By using the transfer matrix method of multibody system, the hard problem of computation of the vibration characteristics of LRMLRS coupled with rigid bodies and elastic bodies is solved which is very difficult to the ordinary dynamic methods, and the vibration characteristics of LRMLRS which is varied when the number of rockets in the launch device is varied, is obtained conveniently. By developing augmented eigenvectors of the LRMLRS and its orthogonality conditions, the nonorthogonality problem of the multibody system including rigid bodies and elastic bodies is solved and the exact analysis of the dynamics response of the LRMLRS including rigid bodies and elastic bodies is realized. By using the random integer programming method, the hard optimization problem which contains continuous variables, discrete variables and random variables at the same time is solved. This method provides a technology for optimum design with random variables and discrete variables. The dynamic optimum design is realized to decrease the number of rockets consumption in the LRMLRS test. The simulation system of dispersion of fire is established by using the maximum entropy method to estimate dispersion of fire.

通过应用多体系统传递矩阵法,解决了刚弹耦合远程多管火箭多体系统振动特性这一通常力学方法不便于解决的计算难题,方便地获得了远程多管火箭振动特性及其随发射架上火箭弹个数变化而变化的情况;通过构造增广特征矢量及其正交性条件,解决了刚弹耦合多体系统特征矢量不具有通常意义下的正交性的难题,实现了对刚弹耦合远程多管火箭动力响应的精确分析;应用随机整数规划法,解决了同时考虑连续、离散和随机变量等多种设计变量的优化设计难题,为含随机和离散变量的优化设计提供了手段,实现了减少远程多管火箭试验用弹量的动态优化设计;建立了应用最大熵法估计的密集度仿真系统,优化射序和射击间隔,实现了提高远程多管火箭射击密集度的动态优化。

A number of research outcomes were concludedThe main conclusions: 1 the capital intensive, recourses intensive, scale-based benefit, high pollution and high industrial correlativeness are five most influential factors in paper industry; 2 theoretically, resources endowment, financing ability, quality of enterprise, structure of industrial organization, relevant industries, and the institutional environment are six key components of competitive power for regional paper industry. Among them, quality of enterprise, financing ability and the structure of industrial organization are the key elements for regional competition in paper industry; 3 the assessment of the competitiveness power of Fujian paper industry has showed that during 1999-2005, the competitiveness power of Fujian paper industry was stable; 4 financing ability and the structure of industrial organization have positive impact on the competitiveness power of paper industry; 5 The SWTO analysis shows that the advantage of Fujian paper industry is resource abundance, however, the disadvantages are financing ability and the structure of industrial organization.

主要结论有:①资本密集、资源密集、规模效益显著、污染型、产业关联度大等5个方面是造纸产业最为重要的5个特性;②从理论上分析,区域造纸产业竞争力的主要构成要素包括资源禀赋、融资能力、企业素质、产业组织结构、关联产业与制度环境等6个要素,其中企业素质、融资能力与产业组织结构是区域造纸产业的核心要素;③从福建省造纸产业综合竞争力的纵向测评结果来看,1999-2005年福建省造纸产业综合竞争力的表现较为稳定;④融资能力与产业组织结构对区域造纸产业竞争力具有显著的正向影响作用,它们是区域造纸产业竞争力最重要的影响因素;⑤根据SWOT分析结果表明,福建省在资源--对区域造纸产业竞争力影响有限的因素—拥有竞争优势,而在融资与产业组织结构等—对区域造纸产业竞争力有重要影响的因素-处于竞争劣势。

Using hydrodynamical/N-body simulations and pure dark matter simulations, we found the dark haloes in the first kind of simualtions are more concentrated than in the second kind of simualtions. This result could increase the predicted probability of giant-arcs in gavitational lensing and cancel the great difference between the theoretical and observational results.

用含气体的数值模拟与纯暗物质的数值模拟比较,发现前者暗晕中的暗物质分布比后者中的更加密集,密集参数更大,这可能可以提高理论预言的引力巨弧的概率从而弥补理论与观测结果间的差距。

Results On conventional CT, pulmonary window revealed widespread intraalveolar calcifications of both lungs concentrating in the subpleural parenchyma of the middle and lower lobes.

结果常规CT表现:肺窗示肺实质内有无数细小散在的粟粒结节,以中下肺的外周部密集,其CT值为200~400HU,多合并不同程度的肺气肿及间质纤维化;纵隔窗示细结节影最密集区常呈沿胸膜的线带状或散在的点簇状钙化,形成&火焰征&及&白描征&。

Fin spacing and density of the staggered tube bundle have much more influence on its performance, when the distance between fins decreased or the tube distributing density increased, heat transfer of the exchanger will be strengthened and pressure drop will be distinctly aggrandized.

从实验和模拟结果分析可知,实验所得传热因子j较模拟结果有12%范围内的减小,而阻力因子f有4%~16%的增大;翅片间距和管排密集度对翅片管换热器性能影响很大,减小翅片间距和增大管排密集度均能增强换热器的换热效果,但压力损失也明显增加。

From these parameters, the new findings are:(1) The ice density from investigation is lower than 2-3 tenths compared with that from NOAA Ice Chart, and the ice thickness in the summer is less than 2 m compared with the results investigated during the First Chinese National Arctic Research Expedition in 1999 (CHINARE-1999);(2) The standing deviation of ice bottom fluctuation is 3.8 times of that of the snow surface on the ice sheet and (3) the maximum speed of ice floe CHIS7 is 1300 m/h in rotation and oscillation.

这些参数指出:现场调查的海冰密集度同NOAA冰图上的密集度相比低2~3成,而厚度比1999年的中国首次北极考察结果减少2m;冰层底面起伏方差约是冰层表面积雪起伏方差的3.8倍;浮冰最快以1300m/h速度运动并伴随振荡旋转。

basing on optics orthogonal codes,this paper proposes a new design scheme of three-dimension optics orthogonal codes.in this scheme,the optics orthogonal codes can be coded not only in space-domain,in time-domain,but also in frequency-domain.it has good auto-cross relativity properties.the simulation figures show that can enlarge the coeds capacity and improve the optics optical communications system performance.so it will be of interesting in coming high dense communication system.

摘 要:基于光正交码编码技术,提出了一种新型空/时/频三维ooc的设计方案,对光信号在时、频和空域进行编码,该码具有理想的自/互相关特性。通过仿真比较,在容量和系统的误码率等性能方面比一、二维ooc都有较大的提高,因而能很好地适应未来高密集光纤通信。关键词:三维光正交码;光码分多址;误码率;高密集光纤通信

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

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三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。