查询词典 mathematic

The latest developments of the remote sensing of lake water quality,such as the mathematic methods for the remote sensing of water quality model,the water quality indicators with the most sensible wave band and applications of TM,SPOT,MODIS,MERIS,AVHRR,CASI etc.

详述了湖泊遥感水质最新发展动态，如遥感水质模型的数学方法、与水质指标最敏感的波段以及TM、SPOT、MODIS、MERIS、AVHRR、CASI等传感器的适用情况，并分析了可能导致湖泊水质遥感模型误差的原因和解决办法。

For confirming the method's efficiency, the turn-off transient mathematical model based on the chopper circuit is developed according to the proposed mathematic model of the turn-off transient current through IGCT, in which the RC-snubbers of IGCT, the stray inductance of chopper circuit and DC-link choke are taken into accounts.

该文建立基于斩波电路的IGCT关断暂态特性的数学模型。该模型充分考虑IGCT阻容吸收回路、线路杂散电感及限流电抗器对IGCT关断暂态过电压的影响。

This article detailedly expatiated upon the principles, contents and methods of cropland classification; it analyzed the necessity to combine the work of cropland classification with GIS technology, summarized the attributions of ARC/INFOand some other related softwares; it established the technologic route of cropland classification supported by GIS, by a case study in Liwu Town,Li County Hebei Province, this article expatiated the practicable mechanism of combining the function of ARC/INFO with the work of cropland classification, and put forward some new ideas and approaches of utilizing GIS: this paper put forward the idea of coding the polygons in the basic graphic database such as soil map and land use map according to their attributes, and put forward the detailed coding project; based on the code databases, it expatiated upon the detailed approaches to create single梖actor map and output the final classification map; it put forward the principles and the method of creating classification units in the environment of GIS, that is how to keep the lines of soil polygon, the border of districts and the important objects such as residential areas, banks of rivers and roads ,and how to overlap single梖actor soil map and land use map, and to delete some vector lines of the overlapped map appropriately; it detailed the methods of creating mathematic model of classification coefficients in the environment of computer, and used FOXPRO6.0 programs to realize the automation of calculating coefficients; it represented the method of plotting the final map by overlapping various coverages according to the code tables and lookup tables, the process of outputting the cropland classifying map was finished by program.

本文法对耕地等别划分的原则、内容及方法作了较详细的阐述，介绍了多系数综合修正法的耕地等别计算方法及其具体应用和AHP的确权方法；分析了耕地等别划分工作与地理信息系统技术相结合的必要性，简要介绍了地理信息系统软件ARC／INFO及其他相关软件的功能特点，制定了地理信息系统支持下耕地等别划分的技术路线，通过对河北省蠡县蠡吾镇的实证研究，重点阐述了ARC／INFO及相关数据库软件与耕地等别划分结合的有效机制及GIS应用的一些新思想、新方法：提山了对土壤图和土地利用现状图等基础图形数据库进行特征编码的思想和具体的编码方案，阐述了基于与图形库相链接的特征编码表，单因素图提取、成果图的输出的具体实现方法；提出了GIS环境下耕地单元划分的原则和方法，即在保留土壤因素图斑界线、行政界线和重要地物等的原则下，将土壤单因素图和土地利用现状图进行拓扑叠加，对叠加图中的矢量线进行适当的删除；阐述了在计算机环境下，耕地分等参数计算模型建立的方法，并用FOXPRO6.0语言程序实现了参数计算的自动化；阐述了根据图形库特征编码表和建立绘图符号查找表，按不同图层叠加绘制成果图的方法，该过程用命令程序实现耕地等别图的输出。

Take the normal graded granularity for example, the curve function of the collaring rectangle was derived, which can provide a kind of mathematic model for drawing the lithologic frame of terrigenous elastic rocks in the second development of graphic software.

为了弥补绘图软件的这些不足，提出用曲边矩形代替矩形来绘制陆源碎屑岩岩性框架，并以表示正粒序陆源碎屑岩岩性框架的曲边矩形为例，详细推导了其曲边的函数表达式，为绘图软件的二次开发提供了陆源碎屑岩岩性框架绘制的一种数学模型。

A good mathematic theory is an important tool to research color image.

好的数学工具是研究彩色图像的有效途径。

In fact, what mathematic models can offer is either commonsensical knowledge or outdated and even wrong ideas.

实际上，当前那些数学模型所能揭示的往往是一般性常识或者过时乃至错误的观点。

Greenhouse environment is a inertia , nonlinear, complex system with many variable. It's very hard to establish mathematic model and control with traditional control method.

温室环境是一个多变量的非线性复杂系统，难以建立精确的数学模型及用传统控制方法实现控制。

Formalization verification of service composition based on Process Algebra and Discrete Time Ambient-Calculus, as well as combinatorial optimization and the partition method based on QoS mathematic model are deeply studied. The service composition architecture supporting formalization verification and QoS-aware composition has been also implemented. Furthermore, the architecture is applied to digital cartoon cooperation manufacturing in the Internet.

为实现动态的跨企业业务协作与集成，本文围绕服务组合行为的正确性检验以及服务质量保证这二个正交的性质，深入研究了基于进程代数Pi演算及离散时间Ambient演算的服务组合形式化检验，以及基于QoS数学模型进行精确计算的服务组合优化与划分方法。

Although Xing Yunlu's work did not go beyond the mathematic level of Shoushi Computus, it had showed that higher-level mathematics knowledge is also necessary for the scholars in the Ming Dynasty to develop the traditional calendrical astronomy, and the astronomers had provided with some necessary mathematics knowledge in the late Ming Dynasty.

邢云路的此项工作表明，在明代传统天文历法中仍然需要应用较高水平的数学知识，而且历算家也具备了一定的水准，而以往认为的明代天文历法研究没有向数学提出更高要求是导致明代数学发展衰落主要原因之一的观点是需要修正的，至少到明末时期已经随着对传统历法研究的深入而对数学提出了更高的要求。

According to theory of the conjugate curves and the envelope curve,the corresponding mathematic model of workpiece-tooth-curve was established.

并根据共轭曲线及包络线理论建立对应工件齿廓曲线的数模型，由二者的数学模型建立完全接触面积的算法。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。