关于信息与计算科学专业的实践教学课程体系构建的一点探讨

在教育转型背景下,信息与计算科学专业实践教学改革势在必行.首先分析了国内该专业实践课程体系设置的现状,提出了该专业课程体系构建的原则,以一个经多年教学改革后积淀的实践课程体系为例探讨了其构建思路,该体系由四大模块构成,在IT人才培养目标上达到了实际效果;为工程应用型本科院校该专业实践课程体系的构建提供了一种可行的思路和方案.     

芳基二硫醚作为自由基硫试剂构建C—S键研究进展

含硫化合物在医药、农业、天然产物和有机材料等方面有广泛的应用,因而引起了科研人员极大的兴趣,开发高效、绿色的含硫化合物的构建和转化方法具有重要意义.近年来,稳定、低毒的芳基二硫醚类化合物作为刺激性强、毒性大的硫醇类化合物的理想替代物,为各种含硫化合物的构建开辟了一条新的途径.从光催化、非金属参与和过渡金属催化三个方面分类综述了芳基二硫醚作为自由基硫试剂构建C—S键的研究进展.     

黑体辐射公式的多种推导及其在近代物理构建中的意义(Ⅲ)

工欲善其事必先利其器。那你有啥器啊?你知道该有啥器啊?你怎么才能有器呢?——作者(接50卷第12期)3黑体辐射谱测量在诸多物理学和物理学史文献中,黑体辐射大多会被从理论的角度加以探讨.     

"双一流"背景下高等农业院校有机化学基础课程教学新模式的构建及实践

四川农业大学作物学入选一流学科建设,有机化学作为农林专业创新型人才培养的战略支撑,如何把握机遇,找准定位,深化有机化学基础课教学改革,为农林类学科培养基础扎实、创新意识强的优质生源是我们长期面临的挑战。以一流学科建设为导向,通过调研确立双一流建设期有机化学基础课实施性教学方案,构建有机化学立体化教学资源库,实践"兴趣培养–思维开发–自主协作学习"课堂教学模式与"基础技能–综合应用–探索创新"梯度式实践教学模式,在农学、林学、动物医学等共35个专业推广,提升创新型人才培养质量,有效支撑我校一流学科建设,为同类农林高校有机化学基础课教学提供参考。     

信息技术环境下自主学习模型构建与实证研究

结合高职学生的专业课程学习,构建了一个信息环境下高职学生自主学习能力培养模型,并基于模型进行教学设计,开展适于信息技术环境下的高职学生自主学习能力培养的实践与探索,最后通过定性和定量研究方法进行有效性的验证和分析.     

高师本科化学专业分类培养模式下教学质量保障体系的构建与实施

介绍河南师范大学化学化工学院以市场需求为导向,设立师资型、学术型、应用型3类人才培养方向,构建分类培养模式,以及对新培养模式下教学质量保障体系的构建、实施和初步成效等方面进行的有效探索。     

A NOTE ON NONAUTONOMOUS KLEIN-GORDON-SCHR(O)DINGER EQUATIONS WITH HOMOGENEOUS DIRICHLET BOUNDARY CONDITION

This note discusses the long time behavior of solutions for nonautonomous weakly dissipative Klein-Gordon-Schrodinger equations with homogeneous Dirichlet bound-ary condition. The authors prove the existence of compact kernel sections for the associated process by using a suitable decomposition of the equations.     

自适应演化硬件系统中遗传算法内核设计

根据基于演化的自适应系统的体系架构,将与具体应用相对独立的遗传算法操作部分取出来,结合算法的操作流程,设计了一个与应用无关的、能够独立完成遗传算法操作的GAK(遗传算法内核).采用VHDL(超高速集成电路硬件描述语言)语言描述的状态机来实现该设计,其中种群规模、染色体长度等参数均可配置.采用Xilinx的Vl000FG680、速度等级为-6的EPGA(现场可编程门阵列)来实现GAK,其中染色体长度为8位、适应度值为16位、种群规模为256,此时该设计的综合结果为:占用资源为485个片(Slice),时钟频率为48.51MH.进而在GAK上仿真求解了多项式函数的极值优化问题，从而验证了设计的有效性.     

Impact of user influence on information multi-step communication in a micro-blog

User influence is generally considered as one of the most critical factors that affect information cascading spreading. Based on this common assumption, this paper proposes a theoretical model to examine user influence on the information multi-step communication in a micro-biog. The multi-steps of information communication are divided into first-step and non-first-step, and user influence is classified into five dimensions. Actual data from the Sina micro-blog is collected to construct the model by means of an approach based on structural equations that uses the Partial Least Squares （PLS） technique. Our experimental results indicate that the dimensions of the number of fans and their authority significantly impact the information of first-step conxrnunication. Leader rank has a positive impact on both first-step and non-first-step communication. Moreover, global centrality and weight of friends are positively related to the information non-first-step communication, but authority is found to have much less relation to it.     

Predicting extreme rainfall over eastern Asia by using complex networks

A climate network of extreme rainfall over eastern Asia is constructed for the period of 1971-2000, employing the tools of complex networks and a measure of nonlinear correlation called event synchronization （ES）. Using this network, we predict the extreme rainfall for several cases without delay and with n-day delay （1 ≤ n ≤ 10）. The prediction accuracy can reach 58% without delay, 21% with 1-day delay, and 12% with n-day delay （2 ≤ n ≤ 10）. The results reveal that the prediction accuracy is low in years of a weak east Asia summer monsoon （EASM） or 1 year later and high in years of a strong EASM or 1 year later. Furthermore, the prediction accuracy is higher due to the many more links that represent correlations between different grid points and a higher extreme rainfall rate during strong EASM years.