一种用于创作艺术画面的梯度着色方法

本文介绍一种创作生动画面的新型着色方法。它不同于以往的单一色彩(或模式)的填充,而是以一种颜色渐变的方式进行填充。利用该算法产生的计算机艺术图片,生动而且逼真,已经应用于电脑动画的创作。文中给出了C语言实现的程序:     

一种信号检测模糊技术及其应用

本文基于模糊理论,建立一种信号检测的模糊模型,并实际运用于连续波多普勒测速雷达目标速度的提取,取得了满意的结果     

应用参数微分法从弹丸试验数据获取阻力系数

本文在介绍弹道模型的基础上,讨论了应用参数微分法获取弹丸阻力系数的过程,并给出了计算机仿真实验结果。此方法已应用于靶场。     

LS-DSP路由器的低功耗设计

LS-DSP是用于航天图像处理的数字信号处理器,内部的协处理器由处理元PE阵列构成。路由器则是实现PE阵列网格互连的专用部件,也是操作最频繁的部件。如何降低处理器功耗,提高算法的执行效率是一个非常重要的研究课题。针对LS-DSP路由器的电路进行门控时钟的低功耗设计改进,并以算法为例进行了控制、执行过程功耗分析和比较。实验结果表明,改进结构的路由器降低功耗76%。     

H∞控制在机载光电跟瞄系统中的应用

机载光电跟瞄系统是一个受多种干扰影响的高阶复杂系统,其对系统的鲁棒性和抗干扰能力要求很高.H∞控制的特点是鲁棒性好,因此在对机载光电跟瞄系统研究的基础上,以方位回路的稳定控制为例建立数学模型,应用H∞控制和Kalman滤波相结合的方法设计控制器.仿真研究表明H∞控制器的控制效果良好,特别是模型参数摄动又有多种干扰作用时,性能虽稍有下降,但仍能有效跟踪.     

考虑地下水浸没作用的预压荷载变化规律与沉降计算研究

研究了堆载预压法加固软土地基的过程中地下水浸没作用对预压荷载的减小情况,给出了深圳蛇口地区堆载预压加固地基过程中荷载的变化规律,利用大、小应变条件下的固结沉降计算公式对几种工况下的计算结果进行了对比分析.结果说明,考虑地下水浸没作用对地基固结沉降的影响随荷载和土压缩性以及土层厚度的增加而增大.通过与传统计算方法的比较,表明进行大变形分析时预压荷载的变化对最终沉降量有显著影响.     

Parallel machine scheduling with eligibility constraints: A composite dispatching rule to minimize total weighted tardiness

We study a parallel machine scheduling problem, where a job j can only be processed on a specific subset of machines M_j, and the M_j subsets of the n jobs are nested. We develop a two‐phase heuristic for minimizing the total weighted tardiness subject to the machine eligibility constraints. In the first phase, we compute the factors and statistics that characterize a problem instance. In the second phase, we propose a new composite dispatching rule, the Apparent Tardiness Cost with Flexibility considerations (ATCF) rule, which is governed by several scaling parameters of which the values are determined by the factors obtained in the first phase. The ATCF rule is a generalization of the well‐known ATC rule which is very widely used in practice. We further discuss how to improve the dispatching rule using some simple but powerful properties without requiring additional computation time, and the improvement is quite satisfactory. We apply the Sequential Uniform Design Method to design our experiments and conduct an extensive computational study, and we perform tests on the performance of the ATCF rule using a real data set from a large hospital in China. We further compare its performance with that of the classical ATC rule. We also compare the schedules improved by the ATCF rule with what we believe are Near Optimal schedules generated by a general search procedure. The computational results show that especially with a low due date tightness, the ATCF rule performs significantly better than the well‐known ATC rule generating much improved schedules that are close to the Near Optimal schedules. © 2017 Wiley Periodicals, Inc. Naval Research Logistics 64: 249–267, 2017     

流动粉浆输送装置的研究

为减轻环卫工和建筑工人劳动强度和提高工作效率,在已有螺旋输送机的工作原理基础上,进行创新。将螺旋片由刚性连接改为柔性连接,将硬管改为软管。经过试验,在选择了一定的工艺参数后,使刚性的螺旋片和柔性的胶管之间,有较好的配合效果,从而实现了螺旋输送机械,可以在输送管道有一定弯曲的条件下,运送砂浆的功能。该研究有一定的实用价值和社会意义。加工制造工艺不复杂,有利于普及。     

基于并行模拟的多核集群系统性能预测和分析

针对多核集群系统所表现出的新的性能特征,提出了面向多核集群系统消息传递应用程序的并行模拟模型并设计、实现了一个并行模拟器MCPSim(Multi-core Cluster Parallel Simulator),MCPSim在功能模型和性能模型上体现了片内核间、结点内片间以及结点间等三个层次上消息通信的特点,同时支持对应用的消息数量、通信量等的百分比分布的profiling功能,采用PRIMEJ、acobi3D、NPB IS以及HPL等Benchmark程序对MCPSim进行了测试,结果表明MCPSim性能预测的精度优于BigSim,同时能够广泛应用于针对多核集群系统消息传递应用程序的性能分析中。     

TIME-VARYING CHARACTERISTICS OF SOUTH KOREA-UNITED STATES AND JAPAN-UNITED STATES MILITARY ALLIANCES UNDER CHINESE THREAT: A PUBLIC GOOD APPROACH

This paper investigates the nature of two military alliances under Chinese threat. The findings are as follows: First, South Korea does not consider China a significant threat while Japan and the United States have recognized China as a serious threat since the 1990s and the 2000s, respectively. Second, the relationship between South Korea and the United States is a true military alliance for all time periods, but the nature of the alliance has changed since the 1970s. Third, although Japan began to form an alliance relationship with the United States in the 1990s, Japan is considered a more significant ally by the United States. This paper implies that, should China provoke a military confrontation, it might be difficult to deduce a common solution among the three countries because of the different response to military threats from China.