青海湖环湖区蝗虫与地貌类型关系的研究

蝗虫对青海湖环湖区的草地有相当严重的危害．摸清蝗虫发生与其生态条件之间的关系,是进行蝗虫有效防治的前提．不同类型的地貌通过其对水热条件的重新分配对蝗虫的发生有不同的影响．作者根据野外实地调查资料,就环湖区蝗虫发生与湖滨阶地、构造台地及山坡地等该区主要地貌类型与蝗虫密度的关系进行了初步研究．     

两类高阶高次非线性差分方程的精确解

利用独立通解法(UGS)研究2类非线性差分方程的精确解,得到了一类非线性齐次差分方程的精确解,它由若干个独立通解共同构成,且独立通解的个数与差分方程的阶数n和方程的次数m的乘积mm无关;还得到了一类非线性非齐次差分方程的一组特解.     

基于蚁群算法的多QoS约束海量数据网格任务调度

针对海量数据计算网格任务调度问题,提出一种多Qos约束网格任务调度蚁群改进算法,优先考虑与数据存储网格结点间数据传输效率高、完成任务概率高的网格计算资源,通过调整蚁群算法中信息素挥发因子和传输导向因子的更新方法来提高算法的收敛速度和全局最优解搜索能力,从而达到调度目标最优.仿真实验结果表明,该算法与QoS-Min-min和QoS-Sufferage等同类算法相比,具有较好的综合性能,特别是在计算数据文件较大时,该算法在收敛速度和全局最优解搜索能力方面有明显的提高.     

空间信息网络中的资源映射与调度研究

目前空间信息网络中卫星资源不尽相同,且卫星节点的星间链路动态变化,给资源映射造成困难,使得网络资源利用不充分.如何实现空间资源利用的最大化,成为亟待解决的难题.为解决上述问题,提供了一种方法:首先,将卫星网络可以提供的资源和任务指标映射表达为多维矢量;再通过线性规划,使资源矢量和任务矢量相匹配,从而使网络资源能更充分地被利用.     

Influence of graphene microstructures on electrochemical performance for supercapacitors

The influence of variant graphenes on electrochemical performance for supercapacitors was studied comparatively and systematically by using SEM, FTIR and Raman spectroscopy, cyclic voltammetry (CV), galvanostatic charge/discharge and electrochemical impedance spectroscopy (EIS). The results revealed that: 1) the nitrogen-doped graphene (N-G) electrode exhibited the highest specific capacitance at the same voltage scan rate; 2) the specific capacitance of the N-G reached up to 243.5 F/g at 1 A/g, while regular graphite oxide (GO) was 43.5 F/g and reduced graphene oxide (rGO) was 67.9 F/g; 3) N-G exhibited the best supercapacitance performance and the superior electrochemical properties, which made it an ideal electrode material for supercapacitors.     

Studies on China graphene research based on the analysis of National Science and Technology Reports

The study tries to reveal the situation and development trends of China's graphene research utilizing National Science and Technology Reports (NSTR) as the new data resource.Findings show a continual increase of graphene projects sponsored by the government.Most of them are from the National Basic Re-search Program of China and the National High-tech R&D Program, which reflects mainly aiming for breakthroughs of China's graphene research in major frontier fields and promoting industrial competitive-ness.As a new material in nanometer area, the graphene research mainly focuses on nanometer research area.Besides, it has also involved more in the promising applications, such as advanced energy technol-ogy, biological and medical technology, testing and analytical instrument technology, etc.Major players are universities and research institutes, and they have collaborated a lot.Few enterprises have played an important role in the collaboration network, so China' s graphene research is still mainly in the basic re-search step.Key scholars with their research interests have been revealed.     

河南省旅游度假区建设因子重要度辨识

随着度假旅游的不断升温,河南省的旅游度假区建设已经进入了一个快速发展的阶段,依托不同资源建设的各种类型的度假区灿若繁星.在度假区建设中也出现了游客需求不明、建设内容不清、建设重点不突出等多种问题.因此,对旅游度假区建设中的主要因子进行科学辨识已经成为一项重要研究课题.以旅游资源学、旅游经济学和游客心理学作为理论基础,选取河南宝天曼生态旅游区为研究标本,对度假客源进行调查取样,同时,结合《旅游度假区等级划分》(GB/T 26358—2010),对旅游度假区建设因子重要度进行分析,以期尝试对河南省旅游度假区开发建设因子重要度进行科学辨识,从而达到促进旅游度假区科学健康发展.     

CO_2激光热处理涤纶薄膜和长丝机理研究

本文利用聚焦后的高功率密度CO_2激光,对涤纶复丝及薄膜进行热处理加以研究。实验结果表明:①CO_2激光在涤纶中的穿透深度与涤纶的直径尺寸相当,并且在穿透深度范围内产生极为迅速的内外同时加热作用;②对16.5tex/30F(150D/30F)的涤纶复丝进行激光加热只需热箱加热时间的百分之一,激光加热的区间长度也只有热箱加热区间长度的百分之一,相应的激光加热的升温速度比热箱加热的升温速度高1～2个数量级,冷却速度也较快;③CO_2激光经聚焦后是加热复丝等线状材料的理想加热源之一。