特征参数

The mechanism of the periodic formation of hierarchic structures was also demonstrated.

通过结构因子的演化，讨论了二尺度相分离结构的形成机理，并且考察了相互作用参数的震荡幅度与体系特征尺度的关系。

The software, based on the technology of digital image processing, is effectual to research the relationship between micro-structure and marco-performance of HMA.

在数字图象处理基础上开发的分析集料颗粒的微观参数，如周长、面积等，可以精确描述沥青混合料的集料的微观特征。

A new algorithm is presented to determine infinite homography matrix and camera intrinsic matrix parameters under one camera motion set from the matched-point sets on two orthogonal planes.

摘要论述由位于正交平面上的特征点对集合复原无穷远单应性矩阵和摄像机内参数的新算法。

The riv- er′s health status can be determined through a holistic appraisal of rivers and their surrounds.Five components of the rivers health include: water quality, aquatic life, physical form, hydrology and streamside zone.Many methods and criteria are available to assess the status of river ecosystem, and this review focuses on RIVPACS,AUSRIVAS,IBI,RCE,ISC,RHS and RHP, which are classified into the pred...

阐述了河流健康状况的内涵，尝试从理化参数、生物指标、形态结构、水文特征、河岸带状况5个方面表征河流的健康状况；并从预测模型法和多指标评价法角度对河流无脊椎动物预测和分类系统、澳大利亚河流评价计划、生物完整性指数、RCE清单、溪流状态指数、河流生态环境调查、河流健康计划等河流健康状况的评价方法进行评述；在探讨美国、英国、澳大利亚、南非等国家河流健康状况评价开展情况的基础上，指出我国迫切需要构建一套适合国情的河流健康状况评价体系，从河流健康角度评价国内主要河流的生态环境质量，并为广泛开展的河流恢复项目提供基础数据和决策依据。

This paper took the high temperature rotation scanning target of the high-current oxygen ion implanter which was designed by the Forty-eighth Institute of CETC as the research object, present modeling and simulation of this target, by utilizing parameter feature modeling and virtual prototype technology.

本文以中国科技集团公司研制的大束流专用强流氧离子注入机的高温旋转扫描靶为研究对象，结合参数化特征建模技术和虚拟样机技术，对高温旋转扫描靶的建模和仿真做了探索性的研究。

The registration model with geometric feature constraint is composed of 6-parameter-registration model and constraint condition linear inequation, which is calculated by iterative algorithm.

在6独立参数模型中增加几何特征约束的不等约束条件组成了附有约束条件的配准模型。

A new kind of the mathematical discription of fines deposition, release and migration in porous media was formulated. So, a new mathematical tool was given for the quantitative discription of the injectivity decline due to the fines problem.

与现存理论相比，本文提出的数学模型具有如下方面的特点： 1、由于直接从微粒在孔隙内的动力学特征出发，因此，模型中需要由实验确定的模型参数较少，同时，模型中不出现由实验确定的经验的关系式。

Since there\'s inlayer heterogeneity in layered sandstone reservoirs and remaining oil potentials are mainly in thin or poor layers, which are mostly in delta front facies growth, this paper studies physical characteristics parameters interpretation methods for delta front deposit reservoirs to deepen the acknowledge to the depositional modes and features for further implementing the develop adjustment potentials and optimizing the potential tapping adjustment patterns. This practice has an important guiding sense to enhance the ultimate production recovery for mature oilfields.

我国大多数主力油田都属于陆相河流—三角洲沉积储层，如大庆的喇嘛甸、萨尔图和杏树岗等油田，这些油田基本上均已进入高含水后期开采阶段，尤其是以河流相发育为主的主力油层综合含水已达到90%以上，由于多油层砂岩油田存在层间的非均质性，油田的剩余油潜力主要集中在以三角洲前缘相发育为主的薄、差油层中，因此研究三角洲前缘相沉积储层的物性参数解释方法，深化其沉积模式及沉积特征的认识，进而落实油田开发调整潜力，优化调整挖潜方式，对提高老油田最终采收率具有重要的指导意义。

Results: The pharmacokinetics of high dose epirubicin was best described by a typical three-compartment model. It showed wide interindividual variation.There was no correlation between its pharmacokinetics and pharmacodynamics. Age was negatively correlated with epirubicin clearance.

结果：高剂量EPI的消除具有典型的三室特征，患者对EPI的代谢存在较大的个体差异；药效学和药动学参数之间未见到明显相关性，年龄与血浆清除率之间呈负相关。

Applications to real aeroengine starting process modeling validate that the proposed method can generate more robust and interpretable models.

实际发动机起动过程建模应用案例证明，这种思路对于具有非线性输入输出关系特征的数据可以产生鲁棒性好、解析性强的线参数非线性模型。

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