系统学

This is the web page of Plant Systematics: A Phylogenetic Approach.

这是植物系统分类法：系统发生学方法的网页。

In order to improve my computer level effectively, I refer to the templet of some similar MIS system and applying the learned knowledge to

为了有效的提高我的计算机应用水平，我综合参考了一些类似的MIS系统，运用了所学过的知识来设计该MIS系统。

In this paper, the male reproductive system of this species was investigated by light microscopy, and electron microscopy, and the tetraploidy embyros of the prawn were induced by heat shock treatment.

本文应用组织学、电子显微镜、细胞遗传学及多倍体诱导技术对日本沼虾雄性生殖系统、染色体及核型、多倍体产生的条件等进行了比较深入的系统研究，对于解决人工授精难题和培育出品质优良的养殖品系具有重要意义。

Automatic threshold choice is difficult and important to color images edge detection, First of all, on the base of human visual properties, threshold versus intensity function of human visual system are researched and analyzed, by using method of mathematic modeling and the result of saturation research, function of least color difference that can be perceptible by visual systems in detecting edge is given.

摘要自动阀值选取是彩色图像边缘检测的难点和关键问题，首先从人类的视觉特性出发，分析了人类视觉系统的亮度感知门限函数，利用数学建模方法和色度学方面的研究成果，给出人类视觉系统对彩色图像边缘所能识别的最小彩色差函数。

Cartography and Geographic Information Systems Research Institute (National Bureau of Surveying and Mapping Institute of Geographical Names) Geographic Information System is mainly engaged in theoretical and applied research, as well as cartography and toponymy research, focused on solving the geo-spatial information collection, storage, management, analysis, expression and applications theoretical and technical problems.

地图学与地理信息系统研究所主要从事地理信息系统理论与应用研究以及地图制图和地名学研究，重点解决地理空间信息采集、存储、管理、分析、表达和应用等方面的理论与技术问题。

The main areas of research include the basis of the number of regional geo-spatial framework for geographic information systems industry, based on geographic information-sharing and social applications, large-scale cartographic works, the theory of modern cartography, toponymy theory, such as Geographic Names Information System.

主要研究领域包括数字区域地理空间基础框架、行业地理信息系统、基础地理信息共享与社会化应用、大型地图制图工程、现代地图学理论、理论地名学、地名信息系统等。

In February 2003, at the national public research institutes reform type, geographic information systems and mapping projects with the State Bureau of Surveying and Mapping Institute of the Institute of Geographical Names merger, changed its name to map and Geographic Information Systems Research Institute, Canada linked to the State Bureau of Surveying and Mapping Toponymy the brand.

2003年2月，在国家公益型科研院所改革中，地理信息系统与地图工程研究所与国家测绘局地名研究所合并，更名为地图学与地理信息系统研究所，加挂国家测绘局地名研究所牌子。

Specific applications include de novo sequencing and re-sequencing of genomes, metagenomics, RNA analysis, and targeted sequencing of DNA regions of interest. The hallmarks of 454 Sequencing? are its simple, unbiased sample preparation and long, highly accurate sequence reads, including paired reads.

具体的应用包括基因组的从头测序和重测序、宏基因组学、RNA分析和DNA目标区域的定向测序。454测序系统的特点是样品制备简单且无偏向性，读长超长且准确度高。454测序系统的技术已经催生了各个研究领域的几百项经同行评议的研究文章，例如癌症和传染病研究、药物筛选、海洋生物学、人类学、古生物学等各方面研究。

DSA features included: dilatations of brain venule could be seen and the number of brain veins increased; the circulati...

其DSA影像学主要表现为：全脑小静脉扩张、迂曲、数目明显增多；全脑动静脉循环时间延长；丘纹静脉和大脑内静脉系统显影增粗、扩张，并发生深静脉滞流，呈现出"雪花样"表现；静脉窦内对比剂滞留、显影延迟或残缺不全。结论：DSA全脑血管造影是诊断脑静脉系统血栓的可靠方法。

Also it is responsible to the security, secrecy, verity and integrity of the information.

信息安全技术是一门综合的学科，它涉及信息论、计算机科学和密码学等多方面知识，它的主要任务是研究计算机系统和通信网络内信息的保护方法以实现系统内信息的安全、保密、真实和完整。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。