基本参数

In general, most 3D parametric design systems use plane and sphere as basic tools to draw a three-dimensional diagram. In this paper, we introduce a class of new drawing tools: conicoid.

通常大多数三维参数化CAD系统都只用平面和球面作为最基本的作图工具，这在某种程度上限制了三维参数化CAD系统的作图范围。

The chemical weathering index, K/Na ratio, eluvial coefficientand A-CN-K diagram , can availably indicate the evolution of pedogenic environment. The A-CN-K and CIA-K/Na diagram showed that the Holocene paleosol was in the primary stage of weathering, which K-feldspar went through weak weathering and K was less leached with much leach of Ca and Na. The intensity of weathering went stronger gradually from west to east in the Weihe Valley.

对化学风化指数、K/Na比值、残积系数等化学综合参数的研究结果显示，各项地球化学参数可有效指示成壤环境与成壤强度；从A-CN-K风化趋势图和CIA-K/Na比较图中可知，渭河流域三个剖面风化程度最高的全新世古土壤基本处于同一风化阶段，即脱Ca、Na，尚未到达脱K的阶段，还是风化较弱的初级阶段，但三者的风化程度是存在差异的，风化程度XJN剖面最低，JYC-N剖面最高，ETC剖面介于其中，说明渭河流域自西北向东南风化程度逐渐增强。

Based on the idea of the equivalence of response.of structure to a large namber of structural linear time history analys es under excitations of ARMA artificial earthquake waves with Monte Carlo method ,the ground motion is madeled as the sin usoidal model,and its parameters are det ermined with probabilistic warranty.

本文运用结构响应等效的思想，在用Monte Carlo法作大量结构弹性时程分析的基础上，将地震动等效成了形式简单的简谐激励模型，为该模型定出了具有概率保证的参数，并求出了模型参数与场地卓越周期和结构基本周期之间的回归关系。

Although the theory of water and soil loss law and the echniques of integrated soil and water conservation measure of primary geomorphy have become quite mature by scientists' effort over several decades in the world, study to water and soil loss in constructional project is slow to developed country. Among researchers, there are many opinions on the model of water and soil loss caused by constructional project because it is serious shortage of data from observation or test in construction projects.

原生地貌水土流失规律和综合治理技术措施经过几十年的研究与探索，基本形成了较为成熟的理论体系和技术措施体系，但我国对开发建设项目水土保持的研究起步较晚，对水土流失预测的概念、内容还存在着不同的理解，特别是目前开发建设项目水土流失定位观测和动态监测数据十分缺乏，水土流失预测模式中的参数缺乏实验值，都是凭经验估计或参照坡面或流域水土流失预报方程中的参数取值，由此预测出的水土流失量误差极大，从而影响到水土保持措施的优化配置。

The paper studies the basic theory and application of multi parameter inversion through inputting for seismic data, outputting for parameter of logging, and it analyses the effect with the geotectonic engineering example.

本文介绍了BP神经网络以地震数据为输人，测井参数为输出的多井多参数非线性反演的基本理论基础和实施策略，并结合具体的岩土工程实例，说明BP神经网络在工程中取得了很好的应用效果。

The paper studies the basic theory and application of multi parameter inversion through inputting for seismic data,outputting for parameter of logging, and it analyses the effect with the geotectonic engineering example.

本文介绍了BP神经网络以地震数据为输入，测井参数为输出的多井多参数非线性反演的基本理论基础和实施策略，并结合具体的岩土工程实例，说明BP神经网络在工程中取得了很好的应用效果。

The procedure and aerodynamic design process of the CPU fan are embodied into parametric design and numerical simulation software utilizing VB language as well as axial-flow fan aerodynamic design software,which can generate high quality HEXA mesh automatically.

采用VB开发了CPU轴流风扇空气动力设计软件和风扇参数化设计模拟软件，使用者只需输入风扇的基本结构参数，便可由程序自动生成高质量的六面体网格，能自动进行批处理模拟和结果后处理。

Hypercube has many advantages, such as smaller diameter, simple routing algorithm, many parallel paths between any two nodes, and fault-tolerance, on the other hand that the Hypercube nodal degree increased logarithmetically to the number of nodes has limited network population. So we propose a constant nodal degree hierarchical topology to remedy the weakness of Hypercube and take advantages of Hypercube most. Given the definition of FCCN we analyse the basic properties including nodal degree , number of links , extensibility and diameter (maximum network communication delay). Also we proposed a simple and self-routing algorithm applied in FCCN. Although the self-routing algorithm is not optimal, but at more than 82% case it can get the shortest path, and the percent is larger and larger increased with network levels. By the self-routing algorithm the internodal distance is calculated to evaluate the network communication delay more clearly. The average internal distance is in order of the cubic root of the network population that is almost same as logarithmetically relation in a few thousands. FCCN is a highly scalable network due to its recursive construction.

首先在比较了基本互连网络的基础上，看到超立体网络的杰出性能，包括网络直径小、寻路算法简单且为自寻路算法、容错能力好等等，但是由于其节点度随网络的规模的增加而按对数关系增长，使得超立体网络的应用规模受到极大限制，所以为了能最大限度利用超立体网络的优点的同时弥补其节点度方面的不足，作者提出了节点度等于常数4的FCCN网络结构，来最多地利用立方体网络的优点；然后在对FCCN网络进行严格的定义后，分析了网络的节点度、链路数、延伸特性、网络的直径（决定网络的最大通讯延迟）等，并提出了适于FCCN网络的简单的自寻路算法，计算自寻路算法可得到最短路径的比例，看到在多于82％以上的情况自寻路算法都是最优的，而且比例随网络层数的增加而增加；应用所提出的自寻路算法计算了可以更加准确反映网络通讯延迟的参数—网络平均节点距离，计算得到此参数与网络大小的立方根成正比，此比例关系在网络的规模在几千节点以内与对数关系的网络几乎一样；FCCN网络是一高度可扩展结构，这是因为FCCN的递归构成方式，使得网络在增加节点时其原有的拓扑结构可以保持不变，不需对网络进行重新设计，为网络的实用扩展提供了条件；理论分析得出FCCN网络是一种高度可扩展高性能网络的结论。

Detection and description of lithological parameters of reservoir, particularly, reservoir parameters (porosity permeability and saturation), are the fundmental problems of reservoir Geophysics, therefore, it is required to develop direct and inversive theorey of reservoirs.

二、探测和描述储集层的岩性参数，特别是油储参数是油储地球物理学的基本课题，这就要求发展储集层的地震正、反演理论。

In order to fully refect the geo-tech basic mechanics behaviors and to rationally explain the strain localization, this paper establishes the theory framework of gradient-dependent plastic model based on the theory framework of gradient-dependent plastic mechanics and in considering the plastic strain's gradient-dependence in double yield function, offers a kind of possible concrete pattern of the generalized plas...

为了较全面地反映岩土的基本力学性质，同时合理解释应变局部化现象，本文基于广义塑性力学的理论框架，在双重屈服函数中考虑了塑性应变的梯度依赖，建立了广义塑性梯度模型的理论框架，并给出了广义塑性梯度模型的一种可能的具体形式，分析了该模型的各个模型参数，尤其是其中的&局部化参数&的物理意义和可能对其产生影响的因素。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。