排序方式: 共有44条查询结果,搜索用时 15 毫秒
1.
2.
AutoCDA是美国Autodesk公司开发的通用计算机辅助设计软件包,是用计算机硬、软件系统辅助人们对产品或工程进行设计、修改及显示输出的一种设计方法。它具有易掌握、使用方便、体系结构开放等特点。AutoCAD自1982年问世,其版本不断更新,到目前为止,已相继推出了R14、2000、2002及2004等十几个版本。随着软件版本的不断升级,它不仅具有很强的二维绘图编辑功能, 相似文献
3.
This paper introduces a software specially in calculating the contribution rate of machaniztion in agriculture by usng economy math method,computer technology and Visual Basic 6.0 version.The software package has friendly interface,simple operating way and accurate,feasible calculating method.It greatly changes the condition in the past which had considerable lots of data and miscellaneous and trivial methods,which were even hard to seek answer,So it has very high practicl value. 相似文献
4.
我国小水电资源及技术发展 总被引:4,自引:0,他引:4
我国小水电资源丰富,但开发水平偏低,存在着极大的发展空间。该文通过详尽的数据统计综述了我国小水电资源开发的现状;系统介绍了我国小水电技术发展的现状;并对我国小水电技术的发展远景进行了一番具体而又全面的探讨和分析。 相似文献
5.
多位点关联分析在人和动植物遗传研究中的应用日益广泛.本文综述了以混合线性模型(mixed linear model,MLM)为框架下多位点关联分析的主要方法及重要软件平台,包括全基因组关联分析(genome-wide association study,GWAS)混合线性模型方法学的建立与发展,多位点模型方法的发展,多... 相似文献
6.
To detect distribution and relative frequency of diffuse neuroendocrine system (DNES) cells in the gastrointestinal tract of channel catfish (lctalurus punctatus), the intestinal tract of channel catfish was divided into seven portions from proximal to distal: the enlarged area after oesophagus, cardia, fundus, pylorus, and anterior, middle, and posterior intestine. Immunohistochemical method using the strept avidin-biotin-complex (SABC) was employed. All antisera between seven portions of the channel catfish were compared statistically using statistical package for the social science (SPSS). Five types of DNES ceils were determined: neuropeptide Y-immunoreactive (NPY-IR) cells were demonstrated in both anterior and middle intestine; serotonin (5-HT) immunoreactive cells were detected throughout the whole gastrointestinal tract; vasoactive intestinal peptide (VIP) positive cells were at the highest frequency in pylorus; glucagon-immunoreactive (GLU-IR) cells were moderate in number in the fundus and anterior, middle intestine, and no immunoreactivity was determined in the other portions; somatostatin (SOM) positive cells were more abundant in the anterior and middle intestine. The regional distribution and relative frequency of immunoreactive cells in the channel catfish, Ictalurus punctatus, are essentially similar to those of other fish. However, some characteristics are observed in this species, which further proved that the diversity of the physiological function of DNES cells was based on their morphology. 相似文献
7.
本软件包(SPTI)能完成甜菜育种试验过程各项参数的自动检测和存储,并根据不同的田间试验方法及数据处理要求,对各参数项进行快速、准确的处理。处理结果以图或表形式给出。该软件包为一实用的软件工具,应用于甜菜育种试验,对各参数的检测、统计分析可节省大量的人力、物力。 相似文献
8.
电网运行数据为调度日常工作中的运行分析提供依据,该文介绍了兴化供电公司是如何应用报表软件收集数据进行运行分析的情况。 相似文献
9.
10.
从70年代开始,随着微机的普及、推广,多元统计分析方法及其他数值分析方法在各个领域得到越来越广泛的应用。 相似文献