基于VB6.0的PC-单片机多波特率通信检测方法

在PC-单片机分布式多波特率通信系统中．利用微软的MSComm控件、VB6．0编程语言和单片机的定时／记数器可以智能、准确、简单地实现单片机波特率随主机变化而自动检测调整。     

An effective hybrid genetic algorithm for flow shop scheduling with limited buffers

As a typical manufacturing and scheduling problem with strong industrial background, flow shop scheduling with limited buffers has gained wide attention both in academic and engineering fields. With the objective to minimize the total completion time (or makespan), such an issue is very hard to solve effectively due to the NP-hardness and the constraint on the intermediate buffer. In this paper, an effective hybrid genetic algorithm (HGA) is proposed for permutation flow shop scheduling with limited buffers. In the HGA, not only multiple genetic operators based on evolutionary mechanism are used simultaneously in hybrid sense, but also a neighborhood structure based on graph model is employed to enhance the local search, so that the exploration and exploitation abilities can be well balanced. Moreover, a decision probability is used to control the utilization of genetic mutation operation and local search based on problem-specific information so as to prevent the premature convergence and concentrate computing effort on promising neighbor solutions. Simulation results and comparisons based on benchmarks demonstrate the effectiveness of the HGA. Meanwhile, the effects of buffer size and decision probability on optimization performances are discussed.     

低辐射薄膜的研究进展

低辐射薄膜(Low-E Film)发展了20多年,它的高可见光透射率和高红外紫外光的反射率被应用在很多领域.低辐射薄膜一般由在线法和离线法制备,所得结构不同,性能也有较多差异.时低辐射薄膜的制备方法、性能,以及最新研究进展和应用进行了综述,并对2种类型的低辐射薄膜进行了比较.     

钢中稀土加入工艺技术研究与应用

为解决钢中稀土加入难题，济钢开发了结晶器喂稀土金属丝工艺，即采用SLW2-4(A)多齿辊无级调速结晶器稀土喂丝机，通过严格控制原始钢水的脱氧程度，合理选择喂丝工艺参数，提高了钢中稀土成分的合格率．稀土回收率达80％以上，稀土在钢中的分布基本均匀。在09CuPTiRE和JCL355等部分钢种应用表明，稀土在钢中有净化、变质和微合金化的作用，钢中夹杂物总量评级平均只有5级，比正常生产钢降低2．2个级别以上。     

摩托车脚踏座断裂失效分析

摩托车脚踏座在出厂检测时发生断裂.采用断口分析方法对摩托车脚踏座的断裂原因进行了分析.结果表明,零件经过铸造工艺处理后,内部残余缩孔的存在以及魏氏组织和带状组织的出现,是造成摩托车脚踏座断裂的主要原因,表现为典型的脆性解理断裂.     

Synthesis and characteristics of SiC whiskers with “rosary bead” morphology

SiC whiskers with ″rosary bead″ morphology were synthesized using suitable silicon source and carbon source through solid reaction at the temperature above 1537 K. The diameter and length of the SiC whiskers were about 0.1-1.0 μm and 20-100 μm,respectively. The largest diameter of their enlarged ends of the whiskers was about 0.2-1.0 μm, and it gradually and smoothly decreased to the size of the plain part of the whiskers. The results of X-ray diffraction analysis show that the crystalline structure of the obtained SiC whiskers is β-SiC. It is considered that the SiC whiskers grow via a vapor-solid mechanism.     

电控汽油机怠速模糊RBF神经网络控制

针对电控汽油机怠速控制要求,提出了一种模糊径向基函数(RBF)神经网络控制方案,在MATLAB环境下进行了控制仿真,获得了比PID、模糊、模糊BP神经网络更好的控制性能。     

建筑装饰工程概预算课程教学改革探讨

建筑装饰工程概预算课程是环境艺术设计专业的一门重要专业课。针对我国现行工程量清单计价模式的特点,结合目前教学中存在的问题,从教学内容、教学方法等多方面提出了该课程教学改革的基本思路,探讨了建筑装饰工程概预算课程教学的新模式。     

基于人工神经网络的原油触变特性参数计算

基于Levenberg-Marquardt算法的前馈BP网络的原油触变特性参数计算方法,计算触变特性参数精度高,不依赖于具体的函数形式,能有效克服传统计算方法的不足。     

济南高新开发区中心广场规划设计

通过对济南高新区中心广场规划设计的分析 ,提出在城市中心广场设计中应结合特定的环境条件 ,树立明确的规划指导思想及设计理念 ,建立以功能结构、道路系统、景观空间及绿化系统为构架的理论体系 ,从而对规划设计的全过程进行整体性的理论指导