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《程序设计基础》课程创新性教学的改革与实践 总被引:1,自引:1,他引:0
通过对程序设计基础课程传统教学内容进行优化,构建新型课程体系、树立"厚基础、重算法、强能力"的教学理念,加强实践教学、积极完善课程资源和鼓励教师参加科研等一系列教学改革与实践,改变以往程序设计课程教学重理论、轻实践的现状,从本质上提升学生的程序设计能力,为后续课程的学习打下一个坚实基础。 相似文献
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Stephen Pampinella 《Small Wars & Insurgencies》2013,24(5):721-743
As US counterinsurgency campaigns draw to a close, doctrine for asymmetric warfare written during the War on Terror has come under heavy criticism. While many have argued that this shift to ‘winning hearts and minds’ is evidence that the United States is taking humanitarianism and nation-building seriously, others argue that a wide gap exists between US counterinsurgency doctrine and the protection of civilians afflicted by conflict. In this article, I show that the latter is true by comparing theories of instrumental and communicative action to US doctrine for operational design, stability operations, and counterinsurgency. I argue that these texts treat the people as an object to be manipulated for the achievement of pre-determined self-interested strategic goals rather than members of a community that jointly designs operations to fulfill shared objectives. However, US doctrine does contain communicative elements that, if prioritized, would better support humanitarian and state-building objectives otherwise subordinated in the War on Terror. 相似文献
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脉冲轮廓是脉冲星的一个重要物理特性,是脉冲星导航的关键观测量。为深入研究脉冲轮廓的理论特性,建立了脉冲星的标准脉冲轮廓数学模型与观察脉冲轮廓数学模型,用指数函数拟合了蟹状星云脉冲轮廓的轮廓函数,并以此为基础模拟了蟹状星云的标准脉冲轮廓。通过模拟非齐次泊松随机打靶实验获得了光子到达时间的仿真测量值,模拟了蟹状星云的观察脉冲轮廓,仿真结果表明该模型能很好地描述巡天观测的脉冲轮廓。对含噪声的脉冲轮廓进行小波阈值去噪,通过数值分析,认为GCV阈值去噪方法对观测脉冲轮廓有很好的去噪效果。 相似文献
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《防务技术》2014,10(2):161-176
There has been increasing interest in numerical simulations of fragmentation of expanding warheads in 3D. Accordingly there is a pressure on developers of leading commercial codes, such as LS-DYNA, AUTODYN and IMPETUS Afea, to implement the reliable fracture models and the efficient solution techniques. The applicability of the Johnson–Cook strength and fracture model is evaluated by comparing the fracture behaviour of an expanding steel casing of a warhead with experiments. The numerical codes and different numerical solution techniques, such as Eulerian, Lagrangian, Smooth particle hydrodynamics (SPH), and the corpuscular models recently implemented in IMPETUS Afea are compared. For the same solution techniques and material models we find that the codes give similar results. The SPH technique and the corpuscular technique are superior to the Eulerian technique and the Lagrangian technique (with erosion) when it is applied to materials that have fluid like behaviour such as the explosive and the tracer. The Eulerian technique gives much larger calculation time and both the Lagrangian and Eulerian techniques seem to give less agreement with our measurements. To more correctly simulate the fracture behaviours of the expanding steel casing, we applied that ductility decreases with strain rate. The phenomena may be explained by the realization of adiabatic shear bands. An implemented node splitting algorithm in IMPETUS Afea seems very promising. 相似文献
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G0分布模型可实现对不同均匀度雷达杂波的较好拟合,二维相关G0分布雷达杂波的精确仿真对雷达系统设计和性能评估具有重要意义。在利用分段多项式拟合的方法近似表示非线性变换的基础上,将二维相关的高斯随机过程作为输入,提出了基于无记忆非线性变换的二维相关G0分布雷达杂波仿真方法。更进一步,为了实现对杂波幅度与相关性的独立控制,并仿真具有同相和正交分量的相参雷达杂波,推导了单视条件下G0分布模型的球不变随机过程特征函数表达式,提出了基于球不变随机过程的仿真方法。仿真结果表明,这两种方法均能够仿真产生满足幅度和相关性要求的二维相关G0分布雷达杂波。 相似文献
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GX2500A图形处理系统是GX2500超高分辨率显示处理系统的重要组成部分,其显示分辨率高达2048×2048象素。该图形处理系统提供了两种软件开发环境,可采用PC微机程序设计语言或采用TMS34010程序设计语言编写应用程序,以适应不同的应用对象。本文介绍了GX2500A图形处理系统的硬件设计和软件设计。 相似文献