发展高新技术产业与加快产业结构调整

从忻州地区当前经济发展的现实出发，提出了发展高新技术产业并促进其在全区结构调整，产业升级和经济发展中发挥主要作用的措施。     

回归乡土:沈从文、韩少功湘西小说比较研究

面对同一对象“湘西世界”,选取同一视角“湘西文化”,沈从文和韩少功由于创作路径和文化态度不同而创作了各自独特的湘西人生世界.分析两人对湘西文化的不同理解以及独立的艺术个性无疑对当代文学的创作具有重要的启示意义.     

实施“天保工程”利与弊分析

自1998年启动天然林资源保护工程以来,黔东南州的生态环境有了较大的改善,同时,也带来了一些实际困难。本文阐述了实施天保工程后产生的利与弊,提出了一些相应的对策。     

黔西南州旅游商品开发探析

购物是旅游活动的重要环节之一,开发旅游商品、促进旅游购物,对优化旅游产品结构乃至推动区域旅游发展都具有重大意义。当前,黔西南州的旅游商品开发尚处于起步阶段,存在特色商品不足、生产规模小、商品知名度低等一些亟待解决的问题。为了促进黔西南州旅游业的进一步发展,有必要采取有效措施加强本地区旅游商品开发。     

大理州经济空间结构的基本格局及其区域政策导向

本文统计数据，在对大理州各县市主要经济指标进行定量分析的基础上，采用改良的主成分分析方法，分析大理州区域经济的非平衡发展态势，研究大理州区域经济发展的基本格局、重点地区和区域政策导向。     

Traveling waves to a Burgers-Korteweg-de Vries-type equation with higher-order nonlinearities

In this paper, first we survey some recent advances in the study of traveling wave solutions to the Burgers-Korteweg-de Vries equation and some comments are given. Then, we study a Burgers-Korteweg-de Vries-type equation with higher-order nonlinearities. A qualitative analysis to a two-dimensional autonomous system which is equivalent to the Burgers-KdV-type equation is presented, and indicates that under certain conditions, the Burgers-Korteweg-de Vries-type equation has neither nontrivial bell-profile solitary waves, nor periodic waves. Finally, a solitary wave solution is obtained by means of the first-integral method which is based on the ring theory of commutative algebra.     

关于西藏大力推进MPA教育的几点思考

要实现西藏的跨越式发展和长治久安,就必须培养和造就一支德才兼备,具有现代管理理论和政策素养,掌握先进分析方法及技术,熟悉某一具体公共管理或公共政策领域的领导者、管理者和公共服务人才队伍。而MP A教育以其厚基础多领域的培养模式、科学的课程体系、理论与实践并重的教学方法,为培养和提高西藏自治区干部队伍的素质及能力,提供了一条便捷有效的途径。     

A hybrid feedback control strategy for autonomous waypoint transitioning and loitering of unmanned aerial vehicles

We consider the problem of autonomously controlling a fixed-wing aerial vehicle to visit a neighborhood of a pre-defined waypoint, and when nearby it, loiter around it. To solve this problem, we propose a hybrid feedback control strategy that unites two state-feedback controllers: a transit controller capable of steering or transitioning the vehicle to nearby the waypoint and a loiter controller capable of steering the vehicle about a loitering radius. The aerial vehicle is modeled on a level flight plane with system performance characterized in terms of the aerodynamic, propulsion, and mass properties. Thrust and bank angle are the control inputs. Asymptotic stability properties of the individual control algorithms, which are designed using backstepping, as well as of the closed-loop system, which includes a hybrid algorithm uniting the two controllers, are established. In particular, for this application of hybrid feedback control, Lyapunov functions and hybrid systems theory are employed to establish stability properties of the set of points defining loitering. The analytical results are confirmed numerically by simulations.     

湖南大湘西地区城市经济竞争力比较研究

在现有城市经济竞争力分析的国内外研究成果的基础上,依据城市竞争力相关理论,借鉴国内外评价机构的评价模型和分析体系,构建出湖南省大湘西地区城市经济竞争力的评价指标体系,并利用因子分析法对大湘西地区城市经济竞争力进行综合评价,并对各个城市的经济竞争力进行比较研究.在此基础上,有针对性地提出了促进大湘西地区城市经济竞争力提升的对策建议.     

Low-Storage Runge-Kutta Method for Simulating Time-Dependent Quantum Dynamics

A wide range of quantum systems are time-invariant and the corresponding dynamics is dictated by linear differential equations with constant coefficients.Although simple in mathematical concept,the integration of these equations is usually complicated in practice for complex systems,where both the computational time and the memory storage become limiting factors.For this reason,low-storage Runge-Kutta methods become increasingly popular for the time integration.This work suggests a series of s-stage sth-order explicit RungeKutta methods specific for autonomous linear equations,which only requires two times of the memory storage for the state vector.We also introduce a 13-stage eighth-order scheme for autonomous linear equations,which has optimized stability region and is reduced to a fifth-order method for general equations.These methods exhibit significant performance improvements over the previous general-purpose low-stage schemes.As an example,we apply the integrator to simulate the non-Markovian exciton dynamics in a 15-site linear chain consisting of perylene-bisimide derivatives.