目的 评估浸泡染色和预着色2种染色方法对高透氧化锆陶瓷半透明性的影响.方法 选用临床上常用的4种类型高透氧化锆瓷块,将白色瓷块ST、TT浸泡入Upcera专用染色液分别着色(浸染组,n=30),预成染色瓷块ST-ML和TT-ML为预染组(n=30).2组均选用VITA经典比色板中的A2、B2、C2色,3种颜色饱和度相同,明度B2>A2>C2.按不同类型和不同颜色将试件分为3个亚组,每组5个试件.另选10个未染色白色瓷块,分为ST对照组(n=5)和TT对照组(n=5).3组瓷块切削、终烧结、打磨、荡洗等工艺相同.采用ShadeEyeNCC电脑比色仪在标准黑白背景下测量色彩学特征参数(L?、a?、b?值),使用半透明参数(translucency parameter,TP)评估各试件的半透明性.结果 染色高透氧化锆的TP值低于同类型的未染色高透氧化锆(P<0.05).不同染色方法的高透氧化锆其TP值差异无统计学意义(P>0.05);不同颜色的高透氧化锆其TP值差异有统计学意义(P<0.05),且浸染组和预染组的TP值由高到低均为B2>A2>C2;染色方法、类型及颜色对于高透氧化锆TP值的影响不存在交互作用.结论 染色会降低高透氧化锆的半透明性,浸泡染色和预着色对其半透明性的影响无明显差别;不同颜色对高透氧化锆的半透明性有影响,随着颜色明度的降低,半透明性逐渐下降.

In this paper, a Hermitian and skew-Hermitian splitting (HSS) iteration method for solving the linear matrix equation AXB=C is proposed. This method is formed by extending the corresponding HSS iteration method for solving Ax=b. The analysis shows that the HSS iteration method will converge under certain assumptions. Moreover, the optimal parameter of this iteration method is presented. Numerical results show that this new method is more efficient and robust than existing methods.

The linear complementarity problems have been considered in this paper,when the coefficient matrix is a block H matrix with the diagonal block symmetric positive definite.By splitting methods modulus-based,the linear complementarity problems can be transferred to fixed point systems of equations.Combining the block relaxed methods with modulus-based synchronous two-stage multi-splitting iteration methods,the generalized block form methods for solving the linear complementarity problems have been obtained.Moreover,we proved that the new methods will converge when some conditions are satisfied.

指出图书馆资源共建共享是信息时代的必然趋势,介绍我国图书馆资源共建共享的几个阶段,阐述其必要性和可行性,分析图书馆资源共建共享的现状和出现的问题,并提出解决问题的方法和手段。

We studied the linear complementarity problem by using the fixed point iteration method in this paper.Its coefficient matrix was generalized from point form to block form,according to the modulus-based synchronous multi-splitting iteration methods.We also established the convergence theory of these modulus-based synchronous block multisplitting iteration methods when the coefficient matrix was a block matrix.

对科技报告的特点进行分析,并对现有相关标准及其应用情况、相关背景情况进行分析介绍,指出修订科技报告编写规则应遵循继承性、前瞻性和通用性原则,描述标准修订的过程。在此基础上,对修订后科技报告编写规则的框架结构、主要内容、文档模板定义（DTD）等进行分析描述,以期对标准的编制及科技报告的撰写有所借鉴和参考。

本文阐述了图书馆员职业现状、职业特点、存在的问题,特别阐述了在新知识时代下时代赋予图书馆员的新的功能与角色。最后,提出了今后馆员职业发展及需要重点解决的一些问题。

The traditional scissors people used now have little changes for several years.However,many problems of it haven't been solved.The people have paid little attention to them.Some defects of traditional scissors were emphatically analyzed,and the TRIZ theory system was used to analyze and solve these deficiencies,and the concrete plan was proposed to make the design of the traditional scissors more conformable and meet the requirement of man-machine engineering and humanization design.

发展现代物流改造传统运输企业,不论是对企业本身还是对整个社会经济的发展都具重要的作用与现实意义。本文在对传统运输与现代物流研究的基础上,分析了当前物流运输业发展现状及未来现代综合物流的发展趋势,阐述了运输企业从传统的运营模式到现代物流模式的转变及在转变过程中需要重点解决的问题。