一类类数大于1的实二次域

对判别式形如d=4p2-p的一类实二次域Q(d),若其类数h(d)=1,则必有d>exp(2.2×108).     

UB8.0灰浆输送泵在建筑施工中的应用

以金都花园国际饭店工程为例,介绍了UB8.0灰浆输送泵在建筑施工中的应用。     

基于物体坐标系的三维图形数据表示

鉴于世界坐标系定义的空间往往远大于被描绘物体的几何尺寸、导致了数据冗余、分辨率低。提出用物体坐标系表示三维图形，使存储空间减小，分辨率提高，并可提高运算速度。     

感悟重于解读

在语文教学中，培养学生感悟课文中的思想内涵和作者写作文章的手法对于提高学生分析问题和表述事物的能力具有重要的作用。如果在长期的教学中增强了学生感悟的能力，让学生主动参与到语文学习之中，就可以真正发挥学生在教学中的主体作用，就可以提高学生分析问题的能力。     

四部分类是学术分类而非图书分类--兼与黄晏妤先生商榷

针对四部分类是图书分类而非学术分类的说法，从四部分类的演变历史、社会功能、学术价值和式微结局等四个方面，论证了四部分类的实质是学术分类而非图书分类的观点。     

论"中得心源"更为根本

绘画艺术以描绘客体的形貌表达主体内心的情意,这是主客体的辩证统一,"师造化"是借物传情、是表象,"中得心源"为本质。     

The condensing vacuole of exocrine cells is more acidic than the mature secretory vesicle

A number of intracellular, membrane-bound compartments in both the endocytic and exocytic pathways of eukaryotic cells have an acidic internal pH. In endocrine cells, the mature secretory vesicle has an acidic pH; secretory vesicles isolated from exocrine cells, however, appear to have a neutral pH. Recently we have used a newly developed immunocytochemical technique to map low-pH compartments in insulin-secreting islet cells with the electron microscope and find that during the maturation of the secretory vesicle there is a progressive acidification of these vesicles that begins as soon as the trans Golgi condensing vacuoles form. Now we have used this technique to examine two exocrine cells: the pancreatic acinar cell and the parotid serous cell. In both cell types, the trans Golgi condensing vacuoles are acidic and accumulate the low-pH probe to the same extent as condensing vacuoles of insulin-secreting islet cells. Unlike insulin-secreting cells, however, maturation of the granules is accompanied by a return of luminal pH to near neutrality. Therefore, although the pH of storage granules in exocrine and endocrine cells is different, the pH of the condensing vacuoles in both cells is acidic.     

WEB元素的对象表达

文章阐述了面向领域的构件化的Web站点辅助开发方法中需要解决的首要问题,即Web元素的对象表达,使Web元素不再表现为文本代码而是表现为具有方法和属性的对象,用户无须熟悉HTML标记,只要通过对对象属性的设置,可以方便地完成网页编辑功能.     

分布式对象通信的实现

分布式系统是多计算机系统,在不同计算机上的运行进程如何通信是关键问题.本文介绍了一种高效的分布式对象通信的模型,即远程方法调用,并利用一个简单的例子说明其实现方法.     

The binary Kuiper-belt object 1998 WW31

The recent discovery of a binary asteroid during a spacecraft fly-by generated keen interest, because the orbital parameters of binaries can provide measures of the masses, and mutual eclipses could allow us to determine individual sizes and bulk densities. Several binary near-Earth, main-belt and Trojan asteroids have subsequently been discovered. The Kuiper belt-the region of space extending from Neptune (at 30 astronomical units) to well over 100 AU and believed to be the source of new short-period comets-has become a fascinating new window onto the formation of our Solar System since the first member object, not counting Pluto, was discovered in 1992 (ref. 13). Here we report that the Kuiper-belt object 1998 WW31 is binary with a highly eccentric orbit (eccentricity e approximately 0.8) and a long period (about 570 days), very different from the Pluto/Charon system, which was hitherto the only previously known binary in the Kuiper belt. Assuming a density in the range of 1 to 2 g cm-3, the albedo of the binary components is between 0.05 and 0.08, close to the value of 0.04 generally assumed for Kuiper-belt objects.     

授人以鱼不如授人以渔--新课改在语文教学中的尝试

语文教学是一门非常复杂的艺术,既要有较强的知识性又有极高的实践性。尤其是在新课改背景下的语文教学实践,对教师的各方面素质提出了更高的要求。转变思想观念,改变课堂教学结构,培养自学习惯。     

多粒度面向对象概念格的构造

目的研究多粒度面向对象概念格的构造。方法在单粒度面向对象概念格外延集上作并运算,得到多粒度面向对象概念的外延集,再运用下近似粒算子,得到多粒度面向对象概念的内涵集,进而构造多粒度面向对象概念格。结果给出了由单粒度面向对象概念格构造多粒度面向对象概念格的方法。结论多粒度面向对象概念格的提出进一步完善了概念格理论。     

面向对象系统分析中的对象识别技术

结合面向对象和结构化系统分析的思想,对面向对象软件开发中的对象识别方法进行了研究