我国东部蓝宝石的宝石学特征

我国东部蓝宝石为岩浆型原生矿床及与之有关的残坡积、冲积砂矿．对各矿区蓝宝石的宝石学研究表明，蓝宝石普遍特征是颜色较暗、透明度差，色彩鲜艳程度低，严重地影响了宝石的质量和经济价值．     

蓝宝石晶体材料标准体系分析

蓝宝石晶体材料具有优良的光学性能、机械性能和化学性能,已成为现代工业的重要基础材料,在LED、消费电子等领域应用广泛.随着国产蓝宝石晶体生长炉及自动加工设备的大范围使用,以及450kg蓝宝石晶锭的问世,我国已成为蓝宝石材料最重要的生产和应用市场之一.本文结合产业情况,介绍了蓝宝石晶体材料的标准现状,并提出了今后标准体系...     

蓝宝石单晶炉隔热屏内胆损坏机理

通过研究金属钼(Mo)在真空环境下蒸发速率和饱和蒸气压与温度的关系,探讨了蓝宝石单晶炉Mo隔热屏内胆的损坏机理.结果表明,蓝宝石单晶炉的核心工作温度在2100℃以上,每炉的高温阶段时间超过120 h,隔热屏内胆在高真空环境下产生蒸发,由电子显微结构可以看到Mo片表面疏松、多孔,厚度逐渐变薄、剥落,失去隔热作用.利用金属...     

混凝土受冻的鉴别和处理

对冬施中常见的砼受冻出现的质量问题进行分析,并提出相应的防治措施及对受冻砼的利用.     

蓝宝石光纤温度传感器测温上限的瓶颈分析及解决方案

通过与热电偶、非接触式辐射测温仪的对比分析,指出基于黑体辐射原理的蓝宝石光纤温度传感器在某些特殊测温场合的不可替代性.介绍了国内蓝宝石光纤温度传感器的研究情况,分析制约其应用和发展的测温上限瓶颈,最后提出解决该问题的初步方案.实验证明该方案能够实现高达2 700℃的温度测量,1 000℃以上最大稳态误差不超过50℃.     

绿松石与处理品的鉴别研究

绿松石是倍受消费者所喜爱的传统玉石,如何准确鉴别绿松石及其处理品,对提升鉴赏水平、保障消费者权益和规范市场消费行为都具有非常重大的意义.借助宝石专业知识,采用折射仪、宝石显微镜、红外光谱仪、紫外光谱仪等专业检测设备,通过对绿松石及其处理品的外观特征和参数知识的阐述比较及光谱特征的研究,探寻科学方法,提高对绿松石及其处理...     

反应溅射法在蓝宝石衬底上制备CeO2缓冲层

用金属铈作为靶材,采用射频反应磁控溅射法在（1 102）蓝宝石衬底上制备C轴取向CeO2外延薄膜缓冲层。结果表明在温度低于450℃或溅射功率低于50 W的条件下CeO2薄膜呈（111）取向生长;升高温度和功率CeO2薄膜的（111）取向减弱,（002）取向增强;在温度高于750℃或溅射功率高于120 W条件下CeO2薄膜呈（111）取向和（002）取向混合生长。结合X射线衍射仪和原子力显微镜表征CeO2薄膜的结构和表面形貌,获得在最优化条件下（衬底温度在680℃左右,溅射功率在80 W左右,溅射气压在25 Pa,氩氧比在15∶1）制备的CeO2薄膜具有优良的面内面外取向和平整的表面。     

Effect of Shouldering Angle on Distribution of Thermal Stress in Sapphire Single Crystal Growth Using Improved Kyropoulos

A two-dimensional model was established in the rectangular co-ordinate to study the thermal stress in the sapphire single crystal grown by the improved Kyropoulos. In the simulation, the distribution, the maximum and minimum values of the thermal stress were calculated. In addition, the relationship between the thermal stress and the shouldering angles was obtained that for lower shouldering angles, the maximum of the thermal stress value is lower and the minimum value is higher. It indicates that the distribution of the thermal stress can be improved by decreasing the shouldering angles of the crystal during the growth process. To evaluate the model, the experiment was carried out and the results are in good agreement with the calculation.     

Influence of Thermal Conductivity on Interface Shape during Growth of Sapphire Crystal Using a Heat-Exchanger-Method

The internal radiative contributed on heat transfer will enhance the heat transport inside the crystalline phase during growth the transparent sapphire crystal using a heat-exchanger-method (HEM). The artificially enhanced thermal conductivity of the solid to include the internal radiation effect was used in the present study. Numerical simulations using FIDAP were performed to investigate the effects of the thermal conductivity on the shape of the melt-crystal interface, the temperature distribution, and the velocity distribution. Heat transfer (including radiation) from the furnace to the crucible and heat extraction from the heat exchanger can be modeled by the convection boundary conditions. In the present study, we focus on the influence of the conductivity on the shape of the melt-crystal interface. Therefore, the effect of the others growth parameters during the HEM crystal growth was neglected. For the homogenous conductivity (km=kS=k), the maximum convexity decreases as k increases and the rate of maximum convexity increases for a higher conductivity is less abrupt than for a lower conductivity. For the no homogenous conductivity (km≠kS), the higher solid's kS generates lower maximum convexity and the variation in maximum convexity was less abrupt for the different melt's km. The maximum convexity decreases slightly as the enhance conductivity of the sapphire crystal increases. The effects of the anisotropic conductivity of the sapphire crystal were also addressed. The maximum convexity of the melt-crystal interface decreases when the radial conductivity (ksr) of the crystal increases. The maximum convexity increases as the axial conductivity (ksz) of the crucible increases.     

司法鉴定文书的规范化

司法鉴定结论作为诉讼证据的一种,具有制作主体的特定性、制作程序的合法性、文书内容的科学性、文书形式的规范性等特征,而司法鉴定文书作为鉴定结论的一种表现形式,其规范化和标准化日趋重要,但目前全国有关司法鉴定文书规范和标准的法规均为试行性或地方性的,且存在诸多缺陷。故文章从司法鉴定文书的内容和形式两方面作出分析,以求对司法鉴定文书的规范化作出改进,呼吁立法机关尽快制定出切实可行的全国性司法鉴定文书规范,以适应司法鉴定活动的需要。     

Eyewitness Identification: Guidelines and Recommendations for Identification Procedures in the United States and in Canada.

Innocent people are convicted each year because of mistaken eyewitness identification. This paper addresses both historical and more contemporary perspectives on the possible limitations of eyewitness identification. The primary purpose of this article is to describe some of the attempts made to protect the fact-finding process from misidentifications. The development and nature of guidelines and recommendations for the design and administration of identification lineups in the United States and in Canada are described. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

空间声场脉冲响应辨识及应用

介绍了采用伪随机信号相关辨识法获得空间声场脉冲响应的实验方法,并用多种实验对该方法作了验证．还将此方法应用于空间有源噪声控制,取得了满意的结果．     

Identification and observational learning from films.

In 2 studies of 25 class rooms of 7th grade children, it was noted that viewers "identify themselves with the like-sexed leading character, in viewing a movie which included both a strong male and strong female lead. With respect to similarity of social class, however, viewers were more likely to choose the protagonist whose social class corresponded with the viewer's aspired social class, rather than his current objective status." (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

工程总承包(EPC)项目风险的辨识及应对措施

文章阐述了EPC总承包的工作范畴以及风险特点,集中分析了决策阶段、投标报价、合同签订、设计阶段、采购阶段、施工管理阶段风险产生的原因,对主要风险的化解和规避提出了应对措施,并对风险控制和处理给出了建议。     

Identification as a process of incidental learning.

If identification is a process of incidental learning, Ss should reflect greater adoption of behavior of individuals with whom they feel identified. Nursery school children were placed with an experimental model whose behavior they were to observe in a learning situation (correct choice of 1 of 2 boxes in which a reward had been hidden). Prior to observation-learning, the children were placed with their "model" in 1 of 2 playroom situations: model friendly/model cold. Children exposed to the model behaving in a friendly way patterned their behavior (both as to discrimination in the learning situation as well as marching and verbal) to a greater extent than those exposed to a pre-test "cold" model. Aggressive behavior was imitated with or without model "warmth." Results related to child development. (PsycINFO Database Record (c) 2010 APA, all rights reserved)