综合社会教育因素，激活初中政治课堂

随着社会的不断进步和发展，中学生对社会的热点问题越来越感兴趣，而初中学生思想上幼稚性和与日俱增的成人感并存，使他们对许多社会现象的认识存在片面性。而政治教材的内容往往滞后于客观现实。因此，改进思想政治课的教法，是当前完成思想政治课教学任务的客观需要。新一轮基础教育课程改革，集中体现“以学生发展为本”基本思想。新的课程结构实现了历史性的突破，设置了“社会实践活动”，课程标准也提出了“初步使学生在基本的思想观点和道德观念上具有辨别是非的能力”，这对初中思想政治课来说，既是挑战也是机遇。为培养创新人才，思想政治课教学就应该突破传统知识教育的束缚，注重学生创新意识和实践能力的培养，重新构筑全新的教学理念和模式。     

选购拖拉机时注意啥?

一、选购拖拉机注意事项 1.外观检查.选择美观大方、适用性强的机型.机型选好后,看一下油漆色泽、光滑度,是否有划痕.有门窗的,玻璃要清晰明亮,安装牢固、平整,且开关灵活.要注意各焊接部位是否牢固、美观,各部位连接螺栓是否紧固,各部位是否存在漏油、漏水、漏气的现象.     

从经济学角度看收入分配不公问题

一、收入分配不公和通货膨胀 最近一段时期,收入分配不公和物价上涨现象是人们讨论的热点问题.网上流行的"晒工资"热贴引发了人们对垄断行业高收入的严重不满和声讨.如,广东电力系统的抄表工被曝年收入高达十五万元,其它垄断行业如石油、通讯、金融、煤炭等行业也是工资高的让人不可思议.而另一方面,这些行业之间、行业内部却仍在相互攀比,认为自己拿的工资并不算多,这更加引起了大众的不满.     

创意思维是素质教育的核心

一、创意思维的本质、特征及功能 创意思维即人们透过事物的现象,抓住事物的本质,然后创造出具有新价值的思维成果.它是思维创新、观念更新、理论创新、行为创新的思维基础.     

企业社会责任缺失现象、原因及应对机制研究

企业是社会的细胞,是社会财富的创造者。它在追求自身利益最大化的同时,也应承担起相应的社会责任.然而,在我国经济发展的过程中,一些企业在承担社会责任方面有过诸多的遗憾,各类历历在目的事件都在一定程度上反映企业社会责任的缺失。为此,文章设计了"企业社会责任缺失现象、原因及应对机制研究"课题,拟对企业的社会责任问题进行全面、深入的研究。并期望以此为契机,探讨出一条符合中国国情的企业社会责任之路。     

各向同性Gent-Thomas材料中空穴生成的突变性

研究了由均匀各向同性不可压缩Gent-Thomas材料组成的球体在给定表面拉伸死载荷作用下的球对称变形问题.得到了描述球体内部空穴生成和增长的空穴分岔方程.证明了方程的平凡解支上存在唯一的分岔点,以及非平凡解在分岔点附近可以局部向左或向右分岔.特别地,当材料参数取某些值时,局部向右分岔的非平凡解对应于拉伸死载荷超过某临界值时,球体内部有空穴生成并连续增长;而局部向左分岔的非平凡解支上还存在一个二次转向分岔点,在这种情形下,当拉伸死载荷还未超过临界值时,球体内部便有一个半径相对较大的空穴生成,这与其他各向同性不可压缩超弹性材料有明显的不同.同时给出了相应的数值算例.     

Experimental study on multi-point autoignition characteristics and influence factors of diesel spray in a controllable active thermo-atmosphere

Auto-ignition characteristics of high-pressure diesel spray in the controllable active thermo-atmos-phere (CATA) were studied with a high-speed camera video system. Multi-point autoignition phe-nomenon of diesel spray in the CATA was observed and the influence factors of the autoignition were analyzed. The stabilization mechanisms of the spray flame in different coflow temperatures were also discussed. The stabilization of the flames was controlled by different factors: autoignition phenomenon in low coflow temperature and flame spread in high coflow temperature. The test results also show that the autoignition delay depends strongly on the coflow temperature and has nonlinear relationship with the temperature. Autoignition delay decreases by almost 10 ms from 16.9 to 7.1 ms when the coflow temperature increases from 996 to 1048 K and only 4 ms from 1048 to 1101 K. The injection parameters in terms of nozzle diameter, injection pressure and pump speed, have some effects on autoignition delay while these effects depend on the coflow temperature. The significant effect lies in low coflow temperature. The injection parameters influence the autoignition delay because it can shorten the physical delay by improving the spray quality and enlarging the spray angle or penetration rate to im-prove mixture quality.     

Transitional phenomenon of particle dispersion in gas-solid two-phase flows

Without using any turbulent model, direct numerical simulation of a three-dimensional gas-solid two-phase turbulent jet was performed by finite volume method. The effects on dispersion of particles with different Stokes numbers by the transitional behavior of turbulent structures were investigated. To produce high-resolution results and reduce the computation and storage, the fractional-step projection algorithm was used to solve the governing equations of gas phase fluid. The low-storage, three-order Runge-Kutta scheme was used for time integration. The governing equations of particles were solved in the Lagrangian framework. These numerical schemes were validated by the good agreement be-tween the statistical results of flow field and the related experimental data. In the study of particle dis-persion, it was found that the effects on particle dispersion by the spanwise vortex structures were prominent. The new behaviors of particle dispersion were also observed during the evolution of the flow field, i.e. the transitional phenomenon of particle dispersion occurs for the particles with small and intermediate Stokes numbers.     

Magnetism in Mn and Co doped ZnO bulk samples

Bulk samples with nominal composition Zn0.95Co0.05O and Zn0.92Co0.05Mn0.03O were fabricated by a solid-state reaction method at 600℃.X-ray diffraction experiment showed that the peaks of secondary phase Co3O4 with a cubic structure were visible in both samples,besides the main peaks of wurtzite structure as ZnO.Magnetization measurement indicated that doping Co alone can induce ferromag- netism in ZnO itself,while the introduction of Mn significantly enhances ferromagnetism.However, both samples showed different magnetic behavior at temperatures below 50 K.It was also noted that ferromagnetic coupling interaction was weakened due to the presence of antiferromagnetic Co3O4.     

高校图书馆员“职业高原”期的人本管理

对校图书馆员"职业高原"现象进行了分析,提出了"以人为本"的管理策略,以帮助高校图书馆员走出"职业高原"期。