The size variation and related implications of mandibles in northern China in the past 7000 years

To better understand variation of Holocene Chinese mandiblular morphology, a study was conducted on 23 metric traits of Neolithic (n=54), Bronze-Iron Ages (n=184) and modern (n=92) adult male mandibles from northern China. Results indicate that the linear characters of these Chinese mandibles evolved in the past 7000 years. From the Neolithic to Bronze-Iron Ages to present day, the overall size of mandibles decreased. The linear characters of the mandiblular features varied between different time periods. The decrease of thickness and height of the mandibular corpus primarily occurred during the Neolithic to Bronze-Iron Ages. The decrease in main size was during the Bronze-Iron Ages to present day. It is possible that mandibles became thinner before the overall size decreased. Comparisons also indicate that the bottom part of the face may have decreased more greatly in breadth than the upper portion. The decrease in mandible size may be associated with changes in climate and diet, and with changes in the craniums size.     

吴伟朝不等式引出的新不等式

从吴伟朝建立的一个幂函数与三角函数复合构成的不等式引出一类颇新的类似结果。     

滤除数字图象盐点噪声的一种方法

研究了数字图象中盐点噪声的识别及滤除方法 ,提出一种新的除噪方法———面积判别法 .阐述了该方法的基本思想 ,对该方法进行了分析评价 ,并通过仿真进行了检验 .     

试析波德莱尔的应和论

一般来说 ,人们一提到波德莱尔的应和论 ,总是把它与象征或通感等同起来。事实上 ,波德莱尔的应和论有着丰富的内容 ,它包括 :自然与人之间的应和、自然与超自然之间的应和、各种感官之间的应和、各种形式之间的应和。     

基于单片机系统的液晶汉字界面制作

从实际需求出发，对点阵式液晶图形显示控制器的原理及用法做了阐述，并介绍了一种内藏T6963C控制器血型液晶显示模块的使用方法，在此基础上，着重介绍了一种在液晶屏上实现汉字显示的较为实用的方法，并用之实现界面操作。     

关于高师数学教育专业深化改革的思考

本文从高师数学教育专业存在的问题出发,从教学内容、教学方法和教学手段等方面探讨了如何进行改革的问题。     

二元羧酸脱羰端烯化反应研究

研究了壬二酸和癸二酸在催化量的双三苯基膦二氯化钾催化下的脱羰反应，考察了反应温度，醋酐用量以及催化剂用量对反应的影响，首次实现催化量的双三苯基膦二氯化钯－三苯基膦催化体系对壬二酸和癸二酸脱羰得到相应的1，6－庚二烯和1，7－辛二烯。     

浅谈高层建筑大体积混凝土施工

文章主要从大体积混凝土对原材料的要求、大体积混凝土的施工工艺要点这两个方面进行阐述,以供参考.     

Investigation of octupole effects in superheavy nuclei with improved potential-energy-surface calculations

It has been found that high-order deformation (e.g.β6) can have important effects on the structures of superheavy nuclei. In the present work, we investigate octupole deformation effects on superheavy nuclei with an improved potential-energy-surface (PES) calculation by including reflection-asymmetric deformations in a space of (β2 ,β3 ,β4 , β5). The calculations give various deformations including highly deformed (β2 ≈ 0.4) and superdeformed (β2 ≈ 0.7) shapes. The octupole-deformation degree of freedom mainly affects the fission barrier beyond the second minimum of PES.     

Two-scale finite element Green’s function approximations with applications to electrostatic potential computation

<正> In this paper,a two-scale finite element approach is proposed and analyzed for approximationsof Green's function in three-dimensions.This approach is based on a two-scale finite elementspace defined,respectively,on the whole domain with size H and on some subdomain containing singularpoints with size h (h H).It is shown that this two-scale discretization approach is very efficient.In particular,the two-scale discretization approach is applied to solve Poisson-Boltzmann equationssuccessfully.