柔性基底红外波段左手材料制备及光学特性

采用平板电极化学电沉积的方法,通过调节实验参量,在柔性ITO导电薄膜基底上制备了尺度与红外波长匹配、结构单元大小不等、排列无序的银树枝状结构.通过调节聚乙二醇-20000浓度可以很好地调控银树枝状结构单元的形貌和尺寸,研究发现,在一定范围内增加电解液中的聚乙二醇-20000浓度,可在基底上形成分布较密、分枝较细、分枝级数较高的银树枝状结构单元.通过在银树枝状结构表面涂覆一定厚度的聚乙烯醇作为绝缘层,组装成了柔性"三明治"结构复合材料,测试得到样品在红外波段的多通带透射谱,平板聚焦实验进一步验证了样品的左手效应.     

高考作弊原因分析及对策思考

高考作弊是考生心理与某些社会现象发生碰撞所产生的一种不正当行为。根除考试作弊现象的根本途径，在于改善社会环境，消除造成考生异常心理的社会因素。     

DECAY RATE OF SAINT-VENANT END EFFECTS FOR PLANE DEFORMATIONS OF PIEZOELECTRIC-PIEZOMAGNETIC SANDWICH STRUCTURES

This paper is concerned with the decay of Saint-Venant end effects for plane deformations of piezoelectric （PE）-piezomagnetic （PM） sandwich structures, where a PM layer is located between two PE layers with the same material properties or reversely. The end of the sandwich structure is subjected to a set of self-equilibrated magneto-electro-elastic loads. The upper and lower surfaces of the sandwich structure axe mechanically free, electrically open or shorted as well as magnetically open or shorted. Firstly the constitutive equations of PE mate- rials and PM materials for plane strain are given and normalized. Secondly, the simplified state space approach is employed to arrange the constitutive equations into differential equations in a matrix form. Finally, by using the transfer matrix method, the characteristic equations for eigen- values or decay rates axe derived. Based on the obtained characteristic equations, the decay rates for the PE-PM-PE and PM-PE-PM sandwich structures are calculated. The influences of the electromagnetic boundary conditions, material properties of PE layers and volume fraction on the decay rates are discussed in detail.     

改变Google的厨师长

用午餐吸引人才 谢尔盖为了了解最吸引这些互联网人才的是什么，特地走访了几十家网络公司。最后谢尔盖发现了由于这些做互联网的工程师工作都是特别忙，因此午餐都是随便吃一些三明治或者别的快餐。谢尔盖觉得这是一个很好的机会，于是决定从午餐开始改变。     

An organic junction between the vein and membrane of the dragonfly wing

A dragonfly wing consists of membranes and both longitudinal and cross veins. We observed the microstructure cross-section at several locations in the dragonfly wing using environmental scanning electron microscopy (ESEM). The organic nature of the junction between the vein and the membrane was clearly identifiable. The membrane was divided into two layers, the upper epidermis and the lower epidermis. These layers extend around the sandwich structure vein, and combine with the adjacent membrane at a symmetrical location along the vein. Thus, we defined this as an organic junction between the vein and the membranes. The organic junction is able to form a tight corrugation angle, which dramatically increases both the warping rigidity and the strength of the wing, but not the torsional rigidity. The torsional deformation is primarily controlled by the microstructure of the longitudinal veins, and is based on the relative rotation angle between the epidermal layer and the inner layer of the vein that forms the zigzag section.     

张治中治新方略述评

张治中是国民党著名的爱国民主将领，从伊宁事件到新疆和平解放，张治中为改善新疆民族关系，加强民族团结，维护祖国统一，增强中苏友好合作，促进新疆经济、文化发展，作出了突出的贡献。本文拟围绕民族问题、外交问题和发展问题来谈张治中的治新方略。     

51例老年慢性支气管炎治疗体会

目的探讨中西药联合治疗老年慢性支气管炎的临床疗效。方法选择51例患者,应用左氧氟沙星、喘可治注射液治疗。结果本组治愈39例,有效9例,无效3例,总有效率94.1%。结论中西药联合治疗治疗老年慢支病人的疗效好,且无不良反应,值得推广应用.     

"三明治"式教学法在本科家畜内科学上的应用

本文详细叙述了"三明治"式教学法在兽医临床课上的应用。从理论教学、实验教学、学生参加教师科研、参加临床实践到考试考核制度的改革以及教学效果的反馈,提出了全面、系统、合理的实施方案。     

氨基膦酸树脂对钕(Ⅲ)的吸附性能

研究了氨基膦酸树脂对钕(Ⅲ)的吸附行为。当pH=5.70时,氨基膦酸树脂对钕(Ⅲ)的静态饱和吸附容量为199.74 mg/g,用1moL/L HCl溶液可以定量洗脱,当T=298 K时,表观吸附速率常数为1.68×10~(-4)s~(-1),吸附热力学参数△H=60.68 kJ/mol,△G=-14.91 kJ/mol,△S=253.65 J/(mol·K),等温吸附服从Freundlich曲线,氨基膦酸树脂功能基与钕(Ⅲ)的配位比为2:1。用红外光谱探讨了氨基膦酸树脂与钕(Ⅲ)的成键情况。