网事一箩筐

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自主创新 方法先行——推荐《用TRIZ进行创造性思考实用指南》

<正>提高自主创新能力,建设创新型国家是国家发展战略的核心,是提高综合国力的关键。"自主创新,方法先行",创新方法是自主创新的根本之源。长期以来,我国对创新方法工作重视相对不够,科学思维的     

引导学生自主学习,在实践中培养创新型人才

<正>1研究背景近年来,计算机硬件,特别是多核技术及嵌入式技术的发展,给计算机相关研究带来了新的契机,同时也对计算机相关课程的教学产生了深远影响。多核技术的发展使未来大多数的软件     

基于数据挖掘的自适应网络入侵检测系统研究

文章提出采用数据挖掘技术,将误用检测和异常检测相结合,构建一个自适应网络入侵检测系统。通过对其关键技术进行研究,阐述实验设计思想。实验证明,该系统能及时更新规则,提高各种入侵检测率,具有一定的自适应能力。     

Energy-efficient adaptive sensor scheduling for target tracking in wireless sensor networks

Sensor scheduling is essential to collaborative target tracking in wireless sensor networks (WSNs). In the existing works for target tracking in WSNs, such as the information-driven sensor query (IDSQ), the tasking sensors are scheduled to maximize the information gain while minimizing the resource cost based on the uniform sampling intervals, ignoring the changing of the target dynamics and the specific desirable tracking goals. This paper proposes a novel energyefficient adaptive sensor scheduling approach that jointly selects tasking sensors and determines their associated sampling intervals according to the predicted tracking accuracy and tracking energy cost. At each time step, the sensors are scheduled in alternative tracking mode, namely, the fast tracking mode with smallest sampling interval or the tracking maintenance mode with larger sampling interval, according to a specified tracking error threshold. The approach employs an extended Kalman filter (EKF)-based estimation technique to predict the tracking accuracy and adopts an energy consumption model to predict the energy cost. Simulation results demonstrate that, compared to a non-adaptive sensor scheduling approach, the proposed approach can save energy cost significantly without degrading the tracking accuracy.     

Rate of convergence for the Legendre pseudospectral optimal control of feedback linearizable systems

Pseudospectral (PS) computational methods for nonlinear constrained optimal control have been applied to many industrial-strength problems, notably, the recent zero-propellant-maneuvering of the international space station performed by NASA. In this paper, we prove a theorem on the rate of convergence for the optimal cost computed using a Legendre PS method. In addition to the high-order convergence rate, two theorems are proved for the existence and convergence of the approximate solutions. Relative to existing work on PS optimal control as well as some other direct computational methods, the proofs do not use necessary conditions of optimal control. Furthermore, we do not make coercivity type of assumptions. As a result, the theory does not require the local uniqueness of optimal solutions. In addition, a restrictive assumption on the cluster points of discrete solutions made in existing convergence theorems is removed.     

湖南动漫艺术设计教育刍议

湖南动漫设计艺术教育快速发展的同时,也面临着巨大的挑战。动漫设计艺术教育的根本是培养综合素质得到全面发展的"人",与此相关,教学模式、教学方法、教学手段等应该得到很大的改变。     

工业设计之创新思维方法浅析

工业设计是科学和艺术的综合体,创新思维在工业设计中具有十分重要的作用。它不仅决定了产品的外观,甚至还影响着产品的制造和使用过程。我国著名教育家陶行知先生认为,"处处是创造之地""天天是创造之时""人人是创造之人"。中国是制造大国,却不是设计大国。中国设计的原创性产品很少,中国的创新能力也亟待加强。但是随着科技的进步,中国的设计能力也在突飞猛进地发展。可以相信,未来的中国一定会成为一个设计大国。     

基于POWERPC82XX的嵌入式通用硬件平台的设计

针对嵌入式系统在通用性及人机界面方面日益增长的性能要求,研究了Motorola公司的嵌入式微处理芯片MPC82XX的主要性能特点.给出了以MPC82XX为核心来构建通用硬件平台的设计方案,同时给出了该平台的硬件结构和各主要模块的电路设计方法.     

基于贝叶斯网的抗肺结核诊疗数据分析

将贝叶斯网络方法应用于临床抗肺结核诊疗数据分析,挖掘筛选出有价值的信息,建立一个能够为以后的治疗提供有价值的参考作用的医院医疗方案以及模型.