遂宁市无公害农产品基地背景值研究

无公害农产品是社会普遍关注的焦点,无公害农产品源于基她背景值的优良,对遂宁市辖区内的无公害农产品基地背景值(土壤质量、灌溉水质量、大气质量)进行了全面的研究分析,为遂宁发展元公害农产品提供了参考依据。     

WebGIS支持的数字校园系统的设计与实现

目前我国正在向着数字化技术发展,并且数字化的校园已经成为了现代校园中非常重要的一部分.在建设数字化校园的时候,可以使用WebGIS技术来实现,促进数字化校园的实现进程.本文对WebGIS技术在辽宁大学数字化校园建设中的应用进行了分析,对其数字化校园进行了详细的设计,促进了辽宁大学数字化校园的实现.     

科学假说和艺术想象

科学和艺术是人类在社会发展过程中所创造的精神财富。表面上如此遥远的两大文化领域 ,却有着久远的亲缘关系 ,而且显示着共同的美感。这其中包括科学假说和艺术想象显示的空灵美。     

《数据结构》实验课程设计与探讨

《数据结构》是计算机及相关专业中一门重要的专业基础课程,它是理论与实践紧密结合的一门课,培养学生解决实际问题的实践能力是教学的首要目的。在授课的同时,应该通过设计合理的实验引导学生加强程序设计和分析的能力。     

市场驱动--我国高等教育改革发展的鲜明特征

10多年的高等教育改革贯穿了一条清晰的主线 :以市场为导向 ,以市场为标准来发展和检验我国的高等教育。本文分析了促使高等教育面向市场的客观环境 ,探讨了市场经济基本原则在高教中的广泛运用和市场驱动的两层含义     

符号流中的模式发现

The idea of discovering patterns in data seems to be essential for decision making in our social activities. This paper presents a simple algorithm which can be used to detect such patterns in elementary sequences of symbols. It adopts a data compression algorithm to seek for interesting patterns, which is important in understanding the way that the input symbol stream repeats itself. In this paper, the algorithm and related data structures are described in detail, and an illustrative example is given.     

Chinese and Canadian Children's Evaluations of Lying and Truth Telling: Similarities and Dfferences in the Context of pro-and Antisocial Behaviors

The present study compared Chinese and Canadian children's moral evaluations of lie and truth telling in situations involving pro- and antisocial behaviors. Seven-, 9-, and 11-year-old Chinese and canadian children were presented 4 brief stories. Two stories involved a child who intentionally carried out a good deed, and the other2 stories involved a child who intentionally carried out a bad deed. When story characters were questioned by a teacher as to who had committed the deed, they either lied or told the truth. Children were asked to evaluate the story characters' deeds and their verbal statements. Overall, Chinese children rated truth telling less positively and lie telling more positively in prosocial settings than Canadian children, indicating that the emphasis on self-effacement and modesty in Chinese culture overrides Chinese children's evaluations of lying in some situations. Both Chinese and canadian children rated trugh telling positively and lie telling negatively in antisocial situations, reflecting the emphasis in both cultures on the distinction between misdeed and truth/lie telling. The findings of the present study suggest that, in the realm of lying and truth telling, a close relation between sociocultural practices and moral judgment exists. Specific social and cultural norms have an impact on children's developing moral judgments, which in turn, are modified by age and experience in a particular culture.     

Numerical investigation of cavitating flow behind the cone of a poppet valve in water hydraulic system

Computational Fluid Dynamics (CFD) simulations of cavitating flow through water hydraulic poppet valves were performed using advanced RNGk-epsilon turbulence model. The flow was turbulent, incompressible and unsteady, for Reynolds numbers greater than 43000. The working fluid was water, and the structure of the valve was simplified as a two dimensional axisymmetric geometrical model. Flow field visualization was numerically achieved. The effects of inlet velocity, outlet pressure, opening size as well as poppet angle on cavitation intensity in the poppet valve were numerically investigated. Experimental flow visualization was conducted to capture cavitation images near the orifice in the poppet valve with 30° poppet angle using high speed video camera. The binary cavitating flow field distribution obtained from digital processing of the original cavitation image showed a good agreement with the numerical result. Project supported by the National Natural Science Foundation of China (No. 59835160) and Scientific Research Foundation for Returned Overseas Chinese Scholars, State Education Ministry of China (No. 50175097)     

以经济增加值为核心的绩效评价体系与建设银行的改革

随着中国建设银行的股份制改造以及上市,追求银行价值最大化日益明确地成为银行首要经营目标.而经济增加值作为目前评价及度量企业经营绩效、创造长期价值、同时又最能体现股东价值增长的最好指标之一,无疑为建设银行加快改革,真正成为国际上具有核心竞争力的商业银行提供了一种科学的绩效评价之策.     

网络时代的高校思想政治教育工作的挑战与对策

网络技术的普及和发展,像一把双刃剑,给高校思想政治教育工作带来了机遇与挑战,它拓宽了高校思想政治工作的渠道,同时也引发许多问题,如何趋利避害进行网络思政教育是一个重要而迫切的课题.