基于产品特征线的产品造型设计研究

在市场竞争日趋激烈的今天,消费者也已经慢慢参与到了设计活动中来。但是消费者或客户在描述他们的需求时,往往会使用一些定性的词语,如＂大方的＂、＂简洁的＂、＂现代感的＂等等,而产品的造型设计则通常是以定量的信息进行描述,如＂直径＂＂、曲率＂等等。因此设计者可以通过对定性描述与定量描述之间的结合点的分析,最终设计出满足消费者的需求的产品造型。特征线正是这样的一个结合点,通过问卷调查等方法对产品造型特征线的分析,可以使产品造型设计过程更简单明了。     

新型梅花落线机托线机构的应用

本文介绍了梅花落线机的新型托线机构的结构及原理,并阐述了现有托线机构的缺陷和新型托线机构的优点。     

自制两用16线校线器

本文就传统的校线方法进行讨论,在此基础上,给出了一种简单新型的校线器。它由若干电阻构成,仅仅使用万用表配合,就既可以工作在有公共地线的情况,也可在没有公共地线的施工现场进行校线,并且只需一个校线人员即可完成工作。同时,可以将多个校线器组合起来进行使用,测试更多线序。     

电动力学中的场线

论述了电动力学中的各种场和迭加场的场线、势线满足的方程及其规律 .还讨论了线性四极矩的场线、势线 .     

电动力学中的场线

论述了电动力学中的各种场和迭加场的场线、势线满足的方程及其规律，还讨论了线性四极矩的场线、势线。     

线邻接矩阵和线符号图

一个符号图,如果它的邻接矩阵恰是某个定向图的线邻接矩阵,则称它为线符号图。本文给出了线符号图的特征性质以及一些相关的结果。设G是一个(p,q)图,G的顶点集VG={v_1,v_2,…v_p},边集EG={x_1,x_2,…     

X线显微镜

一序言 x线显徽镜仅仅在最近十年当中才成功地发展起来,在x线学中开辟了一个新的领域。 它迟迟才得到发展的原因在很大程度上系由于x线在所有已知物质中的折射率均近等于1,因此不可能做出短焦距的透镜,因而不可能根据光学显微镜的同样原理来设计制造x线显微镜,但是近来已经研究出一些方法能够放大某种试样的x线相亦即有反射式的x线显微镜和吸收式x线显微镜。     

等宽线

常宽曲线,简称等宽线。在工程机械、建筑中,等宽线被广泛地应用。例如,三角活塞旋转发动机的缸体实际型线,是摆线的等宽线;转子油泵的转子外廓,是摆线的等宽线;某些薄壳屋顶的截面的上下缘是抛物线的等宽线。等等。本文对等宽线的定义、方程、弧长、曲率、所夹面积进行研究,推出一些结论和公式,也许能给有关的科学技术的研究带来方便。     

提高宁岢线与岢瓦线运输能力的对策

介绍了大秦铁路的基本情况,分析了宁岢线、岢瓦线的原设计能力、2008年以前的实际发送量及近3年的发送运量,对运输需求及能力适应性进行了预测,制定了宁岢线、岢瓦线"短平快"项目的实施方案。     

Quasi-线性Armendariz模

作为线性Armendariz模和quasi-线性Armendariz环的推广, 引入了quasi-线性Armendariz模的概念。 研究了quasi-线性Armendariz模的若干性质, 给出了quasi-线性Armendariz模的一些等价刻画, 讨论了quasi-线性Armendariz模与其他模之间的关系。     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

三昧:佛教审美感悟的主要形式

佛教对中国古代学创作和审美产生了巨大影响，这已经是不争的问题。而在感应外物的心理知觉上与学审美究竟有何内在联系及区别，则又大多语焉不详，或详而无纲、油水分离。笔从佛教教义中拈出“三昧”两个字，深入探寻佛教审美感悟的主要方式，分析它与庄子“心斋”及俗人梦幻的同异，这对中国古代学审美理论的梳理和建构都有重要意义。     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

试验机稳定加载条件的修正及伺服控制的本质

本文通过对试验机-试样系统的分析,认为试验的稳定加载条件不仅仅取决于试验机和试样的刚度(K_m+K_r),而且取决于试验机活塞(端部)的位移速率.具有反馈系统的伺服试验机,正是通过对活塞位移U_q的控制来谐调刚度(K_m+K_r)的变化,从而达到控制应变速率,以保证加载过程的稳定.     

Regulation of canonical Wnt/β-catenin pathway in the nucleus

Canonical Wnt/β-catenin pathway plays a central role in development, homeostasis, as well as tumorigenesis. The regulation of the pathway involves various and complicated mechanisms, including the extracellular, intracellular and endonuclear regulation. As the key component of the pathway, the Lefl/Tcfs-β-catenin complex is also the key target of regulation in the nucleus. In the current review, we are going to summarize the regulators in the nucleus which can modify the transcrip- tional activity of the Wnt/β-catenin pathway.     

建构中国古代文学审美理论:动因和方法

从提高“”的审美能力、“史”的认知能力、“论”的理解能力等方面阐述了建构中国古代学审美理论体系的动因，从注重古人创作和审美的实际、用今人的观点来透视、把定向观照和多向思维结合起来等方面探讨了建构这种理论的方法。目的在于使中国古代学理论的研究既有传统性又有现代性，既有本土性又有世界性。     

我国能源供需波动变化研究

本文从我国近20年来能源产业产品供需量和消费结构的状况着手,研究了能源供需量波动和消费结构变化的特性,并从产业政策、产业结构和经济增长方式演变的角度重点分析了供需量波动和消费结构变化的原因和特点,在此基础上,分析了我国近年能源短缺的原因和解决办法。     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

不同碳氮源对嗜热菌BF80生长和降解苯酚的影响

探测了蛋白胨,酵母粉,葡萄糖对BF80菌生长和降解苯酚的影响．结果表明：与对照相比,0．05％-1％的蛋白胨能促进BF80的生长却抑制该菌的苯酚降解,这种作用随浓度的增加而增大;酵母粉对BF80生长和苯酚降解均有促进作用,在最适浓度0．1％的情况下其生长量OD600达到1．578,苯酚降解率上升到99．21％;不同浓度的葡萄糖对BF80的生长和苯酚降解几乎都没有影响．