现代教学理念下的高校教学方法探究

现代教学应明确三种理念即教师主导性、学生主体性以及知识构建性。在现代教学理念导引下,高校教师可选用案例教学、模拟教学以及基于问题的学习等教学方法提高教学效果。教学方法改革的目标主要是提高教学质量。教育的终极目标不是方法而在于育人。     

在3DS MAX虚拟现实中反光材质的实现

反光材质的实现是3DSMAX虚拟现实中真实与否的重要表现,文章通过3DSMAX材质特性中对Reflection反射贴图的讨论,提供了反光材质的在3DSMAX虚拟现实中的具体解决办法。     

根据反射声波相位信息识别分层介质结构

通过提取分层介质声回波的相频特征信息,对物理性质未知的分层材料实现了有效的分类识别. 分类对象为单层材料、包含两种不同声速和密度的两种双层材料、外层较硬中间较软的三层结构,硬和软是指两种材料c值的相对大小. 数值模拟表明该方法对4种分层结构能进行有效识别. 采用优化的分类流程可减小测量的工
作量.     

沥青路面热反射涂层的降温性能研究综述

传统的沥青路面吸热、储热能力强,容易造成沥青路面车辙问题和加剧城市热岛效应的发展.沥青热反射涂层的使用,可以保护沥青路面稳定性和作为缓解城市热岛效应的措施.分析沥青热反射涂层工作机理和研究方法,结合热反射涂层内外因素对其降温性能的影响进行了研究.最后,分析了沥青热反射涂层对热环境的影响.结果表明,填料折光系数越大,涂层对光的反射能力越强;填料的粒径、体积浓度和涂层的厚度均存在一定最佳范围,在该范围内它们越大涂层降温性能越好;涂层结构的改变可以充分发挥填料的作用,使其降温性能得到提高;着色填料对太阳辐射吸收程度不同,因此不同颜色涂层的降温性能不同;涂层运用在不同类型的路面上,降温效果也不同;在环境因素影响方面,热反射涂层在长期使用中会出现老化、磨损等问题,降温性能也随之降低.各种因素对涂层降温性能影响不同.     

裸眼井和套管井中偶极声场的辐射和接收

运用弹性波互易原理,指出并验证井中声场辐射和接收存在的互易性,使得井的接收响应可以由井的辐射因子计算得到,并结合辐射声场的远场渐近解,使得远探测声场的计算效率显著提高;模拟结果与三维有限差分数值模拟结果吻合。由于井对声场辐射和接收的调制作用,偶极横波远探测测井数据SH型横波的贡献远大于SV型横波的贡献,这一结果为数据的处理和解释提供了理论基础;模拟数据及其成像处理结果还证明了横波远探测技术在套管井中的可行性。所提的理论和方法可以快速模拟偶极横波远探测声场。     

双波长NO-PLIF法测量激波马赫反射温度场的实验研究

利用双波长NO-PLIF法,研究激波管内运动激波在15°斜劈上的马赫反射的温度场分布.实验中以NO作为温度测量的示踪剂,分别选取波长为225.072nm和225.282nm的染料激光作为激发光,获得了较好的荧光图像.对激波在斜劈上的马赫反射流场的波前、波后和反射区的温度分布进行了实验测量,结果表明:NO的荧光强度对温度的敏感程度与激发波长有关,当波长为225.072nm时,荧光强度随温度变化不明显,当波长为225.282nm时,荧光强度随温度变化而剧烈变化.实验测得的温度分布相对数值模拟的误差在15%以内,这表明该方法具有较高的精度,具有一定的工程应用价值.     

关于高校教师绩效考核标准与办法的探讨

近些年来,国内很多学者对高校教师工作绩效的考核标准、考核办法、问题对策及其考核指标体系的构建等多方面进行了探讨研究.这些研究对于引导当下高校教师绩效考核,提高高校教师工作绩效水平以及促进高校和教师的自身不断发展形成了重要作用.但是,目前高校教师绩效考核过程中仍然存在着诸多问题和不足,因此我们仍需结合现代人力资源管理的绩效考核理论和高校教师工作的特殊性,加强对高校教师绩效考核工作的全面的、科学的、更深层次的探讨反思,不断地改进当下高校教师的绩效考核工作.     

Deep structure at northern margin of Tarim Basin

In this paper, a 2D velocity structure of the crust and the upper mantle of the northern margin of the Tarim Basin （TB） has been obtained by ray tracing and theoretical seismogram calculation under the condition of 2D lateral inhomogeneous medium using the data of seismic wide angle reflection/refraction profile from Baicheng to Da Qaidam crossing the Kuqa Depression （KD） and Tabei Uplift （TU）. And along the Baicheng to Da Qaidam profile, 4 of the 10 shot points are located in the northern margin of the TB. The results show that the character of the crust is uniform on the whole between the KD and TU, but the depth of the layers, thickness of the crust and the velocity obviously vary along the profile. Thereinto, the variation of the crust thickness mainly occurs in the middle and lower crust. The Moho has an uplifting trend near the Baicheng shot point in KD and Luntai shot point in TU, and the thickness of the crust reduces to 42 km and 47 km in these two areas, respectively. The transition zone between the KD and TU has a thickest crust, up to 52 km. In this transition zone, there are high velocity anoma- lies in the upper crust, and low velocity anomalies in the lower crust, these velocity anomalies zone is near vertical, and the sediment above them is thicker than the other areas. According to the velocity distributions, the profile can be divided into three sections： KD, TU and transition zone between them. Each section has a special velocity structural feature, the form of the crystalline basement and the relationship between the deep structure and the shallow one. The differences of velocity and tectonic between eastern and western profile in the northern margin of the Tarim Basin （NMTB） may suggest different speed and intensity of the subduction from the Tarim basin to the Tianshan orogenic belt （TOB）.     

基于时间分辨反射测量的混浊介质光学参数计算方法

发展了一种基于时间分辨反射测量技术的混浊介质光学参数重构方法．采用半无限空间扩散方程解析解卷积时间定标测量曲线获得模拟时间扩展曲线,将此与基于时间相关单光子计数技术实测的全时间分辨曲线进行归一化拟合;在对一个已知光学参数的定制模型验证的基础上,通过对4个参数未知的混浊介质进行测量,显示了方法的可行性和有效性．     

Recent development of peptide self-assembly

Amino acids are the building blocks to build peptides and proteins. Recent development in peptide synthesis has however enabled us to mimic this natural process by preparing various long and short peptides possessing different conformations and biological functions. The self-assembly of short designed peptides into molecular nanostructures is becoming a growing interest in nanobiotechnology. Self-assembled peptides exhibit several attractive features for applications in tissue regeneration, drug delivery, biological surface engineering as well as in food science, cosmetic industry and antibiotics. The aim of this review is to introduce the readers to a number of representative studies on peptide self-assembly.