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The article definitions the severals and numerical resources industries to turn the related concept first, introduce the present condition of the local and numerical resources construction, and carried on the introduction and simple analysis to the development of the local and numerical resources business enterprise.

文章首先界定了几个与数字资源产业化相关的概念,介绍了国内数字资源建设的现状,并对国内数字资源企业的发展进行了介绍和简单的分析。接下来对国内数字资源企业的产生背景做了全面的分析,并对它们的发展现状做了比较。然后对目前国内数字资源产业的发展环境做了分析。

The company has the advanced plate work processing equipment, the static electricity spraying equipment 2 sets, including high accuracy numerical control punch press, numerical control knee bend machine, numerical control plate cutter, static electricity spraying equipment, other each kind of equipment.

公司拥有先进的钣金加工设备,静电喷涂设备2套,包括高精度数控冲床,数控折弯机,数控剪板机,静电喷涂设备,其他各种设备。

During the four years study on the project, we develop a dynamical forecast model that describing the subtropical ridge surface. A new theory on the role of the land-sea thermal difference on the formation of the Subtropical High is advanced. It is concluded that in the summer subtropics over each continent and its adjacent ocean LO, SE, CO, and a double-dominant heating from west to east compose a LOSECOD heating quadruplet. The influence of the Eurasia continent on SH varies according to the seasonal variation. From the ideal numerical simulation it is shown the important role of the Eaiuan continent and the huge topography on the mechanism of formation and mantanence of the SH during the summer. It is verified by the numerical simulation that the extension of the subtropical continent into the tropics greatly enhances the " East Asian monsoon". Through the Rossby energy dissipation theory it is verified that the deep latent convective heating induces the onset of the South China Sea monsoon over the Bay of Bengal. The relationship and mechanism between the precipitaiton over the East Asia and the Subtropicla high is illustrated by the data. It is also found the close phase lock between the east-west shift of the SH and the disturbence of the east wind belt over the tropical troposphere. The interaction between the structure and activity feature of the SH and the Meiyu over the Yangtze-Huaihe river valley is revealed from the data. The numerical simulation verified the impact of the different SH pattern on the path of the typhoon.

本项目的研究发展了描述副热带高压脊面变化的动力模型,提出了夏季副热带地区四叶型非绝热加热分布型及相应环流拼图的创新理论;明确了大陆尺度的海陆热力差异在副热带高压形成中的作用;指出欧亚地形对副热带高压和气候的影响随季节变化而变化,通过数值试验证明春季青藏高原的感热加热对亚洲夏季风的爆发地点起了&锚定&的作用,进一步证实了副热带高压断裂和亚洲夏季风的最早爆发地点发生在孟加拉湾东岸;利用Rossby波能量频散理论证明了孟加拉湾深对流潜热释放诱导南海季风爆发的机制;揭示了东亚季风降水的季节内变化与西太副高的关系及机理;揭示了西太副高与东西风带中扰动之间的相互作用过程,指出西太副高的东西活动与热带对流层上空东风带扰动和中纬度西风带扰动的移动和锁相密切相关;研究了夏季淮河流域梅雨期间副高结构和活动特征及其与江淮暴雨的相互作用;验证了不同副热带高压形态对台风路径的不同影响;通过数值试验证明了欧亚大陆和青藏高原等大地形对副热带高压形成和维持的重要作用。

It is available to carry out numerical simulation and fluid dynamic analysis further. Based on Frozen-Rotor Approach and Rotor-Stator Approach, the numerical simulation was carried out in the centrifugal pump and the numerical results showed that the flow in the impeller and volute of centrifugal pump is periodically unsteady. Due to the interaction between impeller and volute the flow is characterized by pressure fluctuations and it is the strongest at impeller outlet and at the vicinity of the tongue. The unsteady pressure fluctuations are also one of the most important reasons to induce vibration and noise. Secondly, the flow field of the volute is characteristic of the vortex flow, and the vortex flow presents very complicated developing process which is creating, increasing and dissipating every now and then. All these lead to very large flow loss in the volute.

采用Frozen-Rotor冻结转子模式和Rotor-Stator滑移界面模式系统开展了不同工况下离心泵内叶轮与蜗壳耦合的定常和非定常流动研究,结果表明由于叶轮与蜗壳的干扰蜗壳进口周向流动的不均匀性是非常强烈的,特别是叶轮与蜗舌间的相互干扰最为强烈,一直影响到叶轮进口和蜗壳扩散管出口的流场;在蜗壳内整个流动是以旋涡形式向出口推进的,并随着包角的变化旋涡表现出十分复杂的产生、发展和耗散的演化过程,导致蜗壳内较大的流动损失。

Considering the nonlinear and Elastic-Plastic and anisotropy trait of soil, the method of numerical analysis can reflect the relation between abreaction of pore press and framework distortion of soil and can simulate the fact of field and complex boundary condition and so on. So the method of numerical analysis has been abroad used in the area of theory research.

数值分析方法可以考虑到土体的非线性、弹塑性和各向异性等特点,能准确地反映出孔压消散与土骨架变形之间的关系,而且可以较好地模拟现场实际情况以及复杂的边界条件等,因此在理论研究领域得到了比较广泛的应用。

To investigate the thermal protection effects of a heat sinking vest with phase-change material in high-temperature and high-humidity environment and the feasibility of numerical computation of heat transfer to the vest, based on the analysis of heat and mass transfer characteristic about the accouterments, a thermodynamic model was set up with the enthalpy method. The uniform energy equation was constructed for the whole domain, and the implicit difference equation was used in every node, the distribution of enthalpy was solved by numerical method.

为了研究相变材料降温服在高温高湿条件下的热防护性能和相变材料数值计算方法应用于降温服传热计算的可行性,在分析服装传热传质特点及计算方法的基础上,利用焓值分析法对服装中的相变材料建立传热模型,在整个区域建立统一的能量方程,在区域结点进行离散,并进行隐式求解,得到焓的分布。

Furthermore data assimilation experiments are conducted with MM5 Adjoint-model Assimilation System made by adjoint codes. With a case of heavy rainfall taking place from 00h July 23 to 00h July 24,2002, several numerical simulation experiments of different schemes are performed. The results are as follows. MM5 Adjoint-model Assimilation System not only can improve the initial field effectively and promote the coordination with the model but also can enhance the forecast on the precipitation and other elements. The assimilation of CDW has an improvement on quality of upper wind. The effect of direct numerical simulation with utilizing the CDW to amend the initial field gains the advantage over the one not.

结果表明,MM5伴随模式同化系统能有效改善初始场与模式的协调能力,提高模式对于降水场和其它要素场的预报;使用云导风资料修正初始场后直接模拟的效果比未使用时直接模拟的效果要好,对部分区域的强降水预报精度有一定程度的改善;使用伴随模式同化系统后,加入云导风资料的同化试验对其它要素的改善与直接同化常规资料的效果相比,改善优势不明显,但从各要素的误差来看,对于风场的改善最好。

Finally, the idea of using new numerical method such as Discontinuous Deformation Analysis and Numerical Manifold Method to simulate the joint of CFRD is proposed, which can make guidance on the design and calculation of CFRD built on thick alluvium deposits.

提出引进新的数值方法,如不连续变形分析方法和数值流形方法,来模拟和计算面板坝接缝变形的设想,对深覆盖层上面板堆石坝的设计和计算有指导意义。

To reduce the large numerical dispersion error for the alternating direction implicit finite-difference time-domain method, an isotropic ADI-FDTD method with low numerical dispersion error was presented.

针对交替方向隐式时域有限差分方法数值色散严重的缺点,提出了一种低数值色散的各向同性ADI-FDTD方法。

The numerical ex-periment has shown that the number of iterations depends significantly on the positiveparameterα,β. But, in general, it is di?cult to choose a proper parameterα,β. Thuswe propose new self-adaptive alternating direction method which adjusts the scale pa-rameter automatically per iteration based on the message of the iterates. We have provedthe convergence of the method under mild assumptions.Finally, we present some numerical results.

对于我们提出的新交替方向法,数值实验表明,迭代的步数与时间与所取的参数α,β有关,然而我们很难去选择一个合适的参数α,β,因此我们提出新自适应交替方向法,对其中的参数α,β进行自适应调整,这种自适应算法根据每步迭代信息自动地调整参数α,β,并证明了算法的收敛性。

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推荐网络例句

Finally it offers the analysis of the fault-tolerance system as well as its test verification.

这样,运行于空间环境中的系统的设计目标就是在保证系统实时性

However, it is still difficult to find out the real reason of the increase of the keratinized gingiva during the orthodontic extrusion whether it is due to the proliferation of the gingival tissue or to its elastic nature, that is because the proliferation of the fibroblasts as well as the connective tissue changes in volume and the intra-fibers spaces were all immeasurable in most of the studies.

然而,仍然难以找到真正的原因增加的角化牙龈在正畸挤压它是否是由于扩散的牙龈组织或其弹性性质,这是因为增殖的成纤维细胞以及作为结缔组织的变化量和内部纤维空格都是不可估量的,大多数的研究。

By east-west into the western mountain front or in Landrace, Xing'an Mountain front to forest-steppe sub-zone and Songnen plain black or plain meadow steppe chernozem Songnen sub-regions.

按东西向分为西部山前台地或长白、兴安山前台地森林草原黑土亚区和松嫩平原或松嫩平原草甸草原黑钙土亚区。