失范与规范:对湘西事变的历史反思

湘西三二事变是当时复杂的政治、经济、历史、社会心理、民族以及自然环境等多种因素综合作用的结果，国民党政府对外界遮蔽事变真相，纵匪为患，造成湘西社会严重失范。对这一事变的反思提示，制度整合和道德整合是维系一个良序社会的基本要素，两者不可或缺和偏重。     

关于湘西州新型工业问题的思考

走新型工业化道路是在社会主义市场经济条件下经济发展的首要选择,结合湘西州经济发展实际,提出了自治州走新型工业化道路的主要途径.     

湘西州体育旅游资源开发问题与对策

采用文献资料,实地调查,专家访谈,逻辑分析等方法,对湘西州体育旅游资源禀赋状况、资源开发以及投资现状进行了科学分析.然后在此基础上,构建了湘西州体育旅游资源开发的对策.     

平面自治系统同宿轨族的存在唯一性

本文研究一般平面自治系统     

凉山家禽生产现状和发展方向

本文阐述了凉山州家禽生产产量、各县市分布、品种特点、当前生产趋势、提出了当前存在的问题和凉山州家禽生产的发展方向。     

应用型大学的能力集成课堂教学模式研究

针对当前大学课堂学生学习自主性缺乏、能力培养被弱化的现状,在调研的基础上,根据认知心理学的心理机制,提出了能力集成课堂教学模式,改变单入单出的传统教学模式,旨在发挥课堂教学应有的作用,增强学生上课的参与意识,培养、锻炼学生的多方面综合能力.     

激励理论视角下的大学生自主学习原动力影响因素调查研究

在激励理论的视角下,以大学生自主学习原动力影响因素为焦点,把大学生自主学习激励路径作为落脚点而展开研究。文章运用了问卷调查研究方法,收集了大学生自主学习原动力影响因素的各项数据;采用了SPSS数据分析软件对各影响因素对大学生自主学习原动力进行相关性分析。结合数据分析结果,分析了不同激励类型下的大学生自主学习原动力的激励路径。     

Requirements and system design for a robot performing selective cleaning in young forest stands

Cleaning is a silvicultural tending operation, primarily aimed at improving the growing conditions of the remaining trees in young stands (ca. 3 m of height). The cost of cleaning has increased in comparison to other forest operations, and the annually cleaned area has decreased in Sweden. Therefore, cleaning with robots might be the key to improve profitability. This paper aims at assessing some design requirements, and suggesting an architecture for a robot cleaning in young forest stands, based on reviewed literature and our own research. The results of cleaning performed by robots have to reach acceptable results and be done at a competitive cost. The robot has to find, select, and handle trees in the whole assigned area according to given instructions. Furthermore, it must be safe for humans, capable of moving safely within the forest environment, and be able to handle snow and other prevalent boreal weather conditions. The vehicle’s size and mass are of importance, and bear on its ability to manoeuvre among remaining stems. Generally, the robot must be capable of operating independently and unattended for several hours in a dynamic and non-deterministic environment. Obstacle avoidance and target identification are identified as the most difficult problems. Machine vision, radar, and laser scanners are promising techniques for both obstacle avoidance, tree identification, and tool control. The proposed architecture is based on a hybrid between the reactive and the hierarchical robot paradigms.     

High accurate estimation of relative pose of cooperative space targets based on measurement of monocular vision imaging

Autonomous rendezvous and docking (ARD) plays a very important role in planned space programs, the success of ARD rests with the estimation accuracy and efficiency of relative pose among various spacecraft in rendezvous and docking. In this paper, a high accuracy and efficiency estimation algorithm of relative pose of cooperative space targets is presented based on monocular vision imaging, in which a modified gravity model approach and multiple targets tracking methods are employed to improve the accuracy of feature extraction and enhance the estimation efficiency, meanwhile the Levenberg–Marquardt method (LMM) is used to achieve a well global convergence. Moreover an experimental platform with DSP and FPGA is designed and implemented. The comprehensive experimental results demonstrate its outstanding accuracy and efficiency, the update rate achieves 16 Hz and the estimated error of depth does not exceed 2% with noise influence.     

Facile preparation of SnC2O4 nanowires for anode materials of a Li ion battery

A simple method of creating densely-packed nanostructures of functional metal oxides is attractive, but it has always been a challenge. Here, we synthesize well-distributed nanostructures of Sn complexes (SnC₂O₄ and SnO₂) via a simple chemical anodization technique followed by annealing. Chemical anodization of Sn surface in oxalic acid, using various organic solvents, provides one-dimensional nanostructures of SnC₂O₄. Length and packing density were precisely controlled by several parameters: solubility of oxalic acid, dielectric constant of organic solvents, and the ion transfer of proton and oxalate anion. Further thermal decomposition converts the SnC₂O₄ nanowires into SnO₂ nanowires, maintaining the nanostructure form in the process. In addition, we expect that the mixture of SnC₂O₄ and SnO₂ nanowires synthesized by this approach might be potential alternative anode materials for prompt charging and discharging Li ion batteries.