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图书资料是国家的宝贵财富,图书资料工作人员肩负着社会经济各方面发展的图书资料调查,图书资料分析,图书资料整理上报和图书资料信息保存的职责,图书资料人负的工作质量和工作效率直接关系到单位图书资料的完整齐全,安全和利用效果.基于此,本文主要对图书资料的管理与服务机制的改革进行了探讨. 相似文献
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张俊红 《湖北函授大学学报》2014,(11):105-106
《毛泽东思想和中国特色社会主义理论体系概论》(以下简称"概论")是一门集历史学、政治学、科学社会主义和当代经济与政治等学科交叉形成的综合科学,它是高校思想政治理论教育和研究的重要学科,对大学生进行政治思想教育,帮助他们树立正确的世界观、人生观和价值观具有十分重要的意义。因此,深入研究"概论"课程实践教学改革的现状,分析存在的问题,并针对当今我国高校"概论"进行实践教学改革的背景提出相关改进意见,将对推动高校"概论"课程改革具有十分重要的意义。 相似文献
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A fault diagnosis model is proposed based on fuzzy support vector machine (FSVM) combined with fuzzy clustering (FC).Considering the relationship between the sample point and non-self class,FC algorithm is applied to generate fuzzy memberships.In the algorithm,sample weights based on a distribution density function of data point and genetic algorithm (GA) are introduced to enhance the performance of FC.Then a multi-class FSVM with radial basis function kernel is established according to directed acyclic graph algorithm,the penalty factor and kernel parameter of which are optimized by GA.Finally,the model is executed for multi-class fault diagnosis of rolling element bearings.The results show that the presented model achieves high performances both in identifying fault types and fault degrees.The performance comparisons of the presented model with SVM and distance-based FSVM for noisy case demonstrate the capacity of dealing with noise and generalization. 相似文献
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网络对大学生心理的消极影响及解决对策 总被引：2，自引：0，他引：2
互联网的迅猛发展不仅加快了信息传播的速度和数量，改变了人们的思维方式、生活方式和交往方式，同时也为使用者布下了一个温柔的心理陷阱。近年来，大学生因触网而引发的一系列心理问题已经引起了社会各界的广泛关注。网络对大学生的心理有哪些负面影响、如何消除诸种不良的影响并引导大学生健康上网，将继续成为心理咨询工作者和德育工作者研究和探索的热点课题，本文就此进行了分析和探讨。一、网络对大学生心理产生消极影响的原因及其危害互联网的迅猛发展造就了大批网民，据互联网信息中心２００１年的一项统计，我国上网人数已达２６… 相似文献
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Based on the nonlinear continuum damage model(CDM) developed by Chaboche,a modified model for high cycle fatigue of TC4 alloy was proposed.Unsymmetrical cycle fatigue tests were conducted on rod specimens at room temperature.Then the material parameters needed in the CDM were obtained by the fatigue tests,and the stress distribution of the specimen was calculated by FE method.Compared with the linear damage model(LDM),the damage results and the life prediction of the CDM show a better agreement with the test and they are more precise than the LDM.By applying the CDM developed in this study to the life prediction of aeroengine blades,it is concluded that the root is the most dangerous region of the whole blade and the shortest life is 58 211 cycles.Finally,the Cox proportional hazard model of survival analysis was applied to the analysis of the fatigue reliability.The Cox model takes the covariates into consideration,which include diameter,weight,mean stress and tensile strength.The result shows that the mean stress is the only factor that accelerates the fracture process. 相似文献