对高校收费合理性的调查与分析

通过问卷调查的方法,揭示了目前大学生对高校收费制度合理性的看法,分析了我国高校收费制度存在的问题,提出了改革和完善我国高校收费制度的建议。     

Bound lipids in lacustrine sediments in Guchenghu Lake, East China

Conclusion Lipids present in different modes of occurrence in lacustrine sediments vary obviously in their composition. The ester-bound and amide-bound lipids are more likely to be derived from autochthonous input such as bacteria, algae and fungi in the lake, and they were more stable than the free lipids in the process of early diagenesis. Bound lipids record the more actual information about the paleoclimatic and paleoenvironmental changes. Amide-bound P-hydroxy fatty acids can be used as a fingerprint of the past bacterial communities which is informative to the paleoenvironment.     

浅谈如何合理利用能源

从高效利用能源、资源综合利用、可再生能源、开发利用核能等4方面,探讨了我国合理利用能源和加强资源开发的必要性。     

信息时代如何做好档案管理工作

档案工作是为社会的政治、经济、文化、科教等各方面直接提供服务的。随着网络化和信息化的发展，档案工作者面临新的挑战。本文从四个方面论述了档案工作应如何应对挑战。     

临汾市城区周边乡镇饮用水氟含量调查及分析

为全面了解和掌握临汾市城区周边乡镇生活饮用水氟含量状况,及时筛查出高氟水源,对城区周边的17个乡镇饮用水进行了氟含量调查,共筛查出94个行政村中的高氟水源,为科学改水决策提供了重要依据。     

认真组稿开拓稿源提高学报的学术质量

学报的学术质量取决于学报稿件的学术水平 ,而稿件的学术水平取决于作者的学术水平。充分发挥编委会在学术界的优势和作用 ,充分发挥编辑的主观能动性 ,认真组稿 ,开拓稿源 ,是提高学报学术质量的重要工作环节     

金属波导对电子设备电磁效应的影响

为减少电子设备中通风散热孔洞耦合的电磁干扰,采用金属波导来屏蔽孔洞.从干扰源的种类、波导长度、波导形状3方面研究金属波导对电子设备中心点处电场与屏蔽效能的影响.UWB对金属腔体的影响最大,快速HEMP对腔体的影响最小;增加矩形波导长度,有利于抑制低频段电磁干扰;圆形波导和方形波导对干扰源的抑制能力较强.研究结果能为电子设备的电磁防护提供理论参考,指导工程防护设计,具有重要的应用价值.     

基于多源多层次信息融合的网络安全态势感知方法

针对网络安全态势感知范围局限、信息来源单一及准确性偏差较大的问题,提出了一个全方位整体上感知网络安全态势框架.充分考虑多信息源和多层次信息融合,从3个维度上动态生成网络当前安全状况,准确地反映网络当前安全态势,易于逆向查找异常组件.提出"3σ法则"离散化连续型随机变量方法,对建立适合处理非确定性信息融合的贝叶斯网模型有重要的理论与实践指导意义.最后,利用网络实例数据,对该模型和算法进行了验证,结果表明了该方法的正确性.     

Preparation and kinetic analysis of Li4SiO4 sorbents with different silicon sources for high temperature CO2 capture

Using diatomite and analytical pure SiO2 as silicon sources,Li4SiO4 sorbents for high temperature CO2 capture were prepared through solid-state reaction method.Phase composition was analyzed by X-ray diffraction,and the CO2 absorption capacity and absorptoin-desorption performance were studied by the simultaneous thermal thermogravimetric analyzer(TG-DSC).The results showed that silicon source had an important influence on CO2 absorption properties.The kinetic parameters for the chemisorption and diffusion processes were obtained by the isothermal study for different silicon sources.The results showed that the activation energies for these two processes were estimated to be 105.427 and 35.928 kJ/mol for the sample with analytical pure SiO2(AS).While for the sample with diatomite(DS),the activation energies for these two processes were estimated to be 78.500 and 20.439 kJ/mol,respectively.     

浅谈皮江法炼镁项目环境影响评价中污染源分析及污染治理措施

对皮江法炼镁项目的环境影响评价进行了各种污染源(包括废气、废水、噪声、固体废弃物)的分析,并制定了有效的污染治理措施,提出了固体废弃物综合利用途径。