儿童编程工具发展历程、特征及对未来教育路向的影响

摘 要：从1960年代LOGO的诞生开始,儿童编程经历了准备期、发展期、实施期、停滞期、复兴期五个时期的发展。总体特征是从复杂语法到简单语法、从抽象系统到可视化系统、从文本编程到非文本编程、从软件编程到物理编程。编程工具的不断发展和完善,让儿童学习编程成为可能。随着数字化社会的到来,编程教育将逐渐成为儿童教育中不可或缺的一部分,并将向下延伸到小学和幼儿园,其教育路向很可能朝学校化、普及化、低龄化发展。     

海南省高新技术产业发展规划研究

高新技术产业的发展已经成为21世纪国际经济竞争和科技竞争的焦点。对我国高新技术产业的发展进行预测与规划研究,具有重要的理论意义和现实的指导意义。本文运用系统工程学的多目标决策分析方法对海南省高新技术产业的发展建立了多目标规划模型,而后利用历史数据进行仿真运算;在此基础上,对海南省未来高新技术产业的发展提出了可行性建议。     

关于混合整数线性规划可行解的等价问题

本文使用对偶的Fourier-Motzkin消去法,讨论了如何等价地消去混合整数线性规划的约束。同时,本文对任一线性规划问题给出了一个新的有限算法——CR法。     

电气信息类新专业建设若干问题的思考

运用系统工程的理念,探讨了电气信息类新专业建设中需要解决的若干问题,并就专业规划、整合分流、师资科研团队等几个重要问题进行了思考,阐述了个人的一些观点。     

圆柱凸轮的批量数控加工

通过对凸轮形状及加工工艺的分析。找到了在三坐标数控铣床上加工批量圆柱凸轮的可行方案,并有针对性的采取对策,对三轴数控铣和加工程序进行了小小的改造和修改。从而解决了原来只能在四轴加工中心上加工,加工成本高且效率低的问题。     

以C语言为主线整合数字化技术课程群

文章阐述了以C语言程序设计方法为主线,将《C语言程序设计》、《EDA技术及应用》(EDA—E lec-tron ic Design Autom ation)、《虚拟仪器》(VI—V irtual Instrum entations)、《DSP技术与应用》(DSP—D igital S ig-nal Processor)等四门具有典型数字化特征的课程进行有机融合,以形成数字化专业技术课程群的思路、方法和措施。论述了课程的地位和可融合性、课程相关技术的先进性、整合与建设的必要性和可行性,提出了建设校级一类课程和省级优质课程的目标和相关措施。     

面向对象的客户机/服务器应用软件的开发平台——PowerBuilder

介绍了最新的客户机/服务器应用软件开发平台PowerBuilder,着重突出了其面向对象程序设计的特色及支持多数据库的能力。     

如何培养学生的软件开发经验

计算机软件的发展日新月异,对于初学者来说应该如何下手,这就需要教师们组织好教学内容和开设课程的顺序,教会学生们计算机软件编程的入门方法,培养他们软件编程的好习惯,丰富同学们实际开发软件的经验,为学好计算机打下良好的基础。     

Computational Forecasting of Wavelet-converted Monthly Sunspot Numbers

Monthly average sunspot numbers follow irregular cycles with complex nonlinear dynamics. Statistical linear models constructed to forecast them are therefore inappropriate, while nonlinear models produce solutions sensitive to initial conditions. Two computational techniques - neural networks and genetic programming - that have their advantages are applied instead to the monthly numbers and their wavelet-transformed and wavelet-denoised series. The objective is to determine if modeling wavelet-conversions produces better forecasts than those from modeling series' observed values. Because sunspot numbers are indicators of geomagnetic activity their forecast is important. Geomagnetic storms endanger satellites and disrupt communications and power systems on Earth.     

First passage game

Appealing to the theory of stochastic games, a two-person, zero-sum first passage game, which may be viewed as a generalization of the first passage decision problem, is developed. In the first passage game, the players have stationary optional strategies and the values are unique and these can be computed using an algorithm for terminating stochastic games. It is also shown that the solution of a recurrence game is closely related to that of the first passage game. Finally, it is shown that a finite step stochastic game with nonstationary transition probabilities and payoffs can be converted to a first passage game whose solution yields a solution of the original finite step game. The first passage game so obtained has stationary transition probabilities and payoffs. Because of its special structure, the solution method reduces to a dynamic programming recursion in the context of games.