人机系统中视域评估的可视化

为了达到视域评估的可视化效果,文中构建了人眼可视范围的半透明模型,并绑定到虚拟人的骨骼中,通过驱动虚拟人,以实时混合绘制技术完成动态视域评估。以龙门式数控加工中心造型设计模型为对象进行实例仿真,结果表明逼真的可视化效果使得视域评估变得简单、快捷和直观,避免了大量的人工运算,提高了视域评估的速度、降低了人为失误。该方法可直接面向工程的实际应用,满足各类布局设计的可视化评估要求。     

光纤陀螺仪测量振动方法的数值模拟

应用数值模拟方法对光纤陀螺仪进行结构振动测量的方法进行了理论上的研究，分析结果表明光纤陀螺仪是可以应用于结构振动测量，测量精度可以满足工程需要。     

InSb伪币检测传感器的研究

】文中介绍了以磁阻效应为工作原理的ＩｎＳｂ伪币检测传感器的设计和制作。这种传感器的主要特点是高分辨率、非接触、体积小、重量轻和使用寿命长。性能测试结果表明，在０．３Ｔ磁场内，磁阻灵敏度为１．８～３。     

基于IMS架构的视频会议系统

IMS是下一代网络的核心技术,是固定和移动网络融合的重要基础。在IMS构架逐步完善的前提下,人们更多的关注于基于IMS构架之上的业务提供。视频业务是目前的热点业务,也是下一代网络中的一项重要业务。文章介绍了一种基于IMS构架的视频会议系统,包括系统的构架、通信协议和功能实体间的通信流程。     

三弧抄板

现有转筒烘干机的抄板不能把料撒在整个转筒内 ,而且撒料也不合理 .用力学理论和实验结合得出的三弧抄板克服了这些缺点 ,并且填充率高 (>2 0 % ) .如果用于工业生产 ,必将有显著的节能效果 .     

Slag-foaming phenomenon originating from reaction of titanium-bearing blast furnace slag: effects of TiO2 content and basicity

ABSTRACT

The foaming behaviour originating from the reduction of iron oxide in molten CaO–SiO₂–MgO–Al₂O₃–TiO₂ slag was studied at 1500°C with the aid of a real-time foaming process monitoring system. The effect of TiO₂ content and binary basicity on the slag foaming were investigated. It was found that the TiO₂ content has a significant influence on the foaming degree, while the basicity of the slag has a smaller influence. The foam-generation time, foam duration, and foam-elimination time greatly increased with increasing TiO₂ content, while they slightly increased with increasing basicity. Furthermore, the source of gas and the effect of physical properties of the slag on the foaming behaviour were also discussed. This study can provide a guideline for the utilisation of high-ratio titanium-bearing magnetite ore in the blast-furnace iron-making process, which is seriously affected by the slag-foaming problem.     

模糊分布式柔性作业车间调度优化

针对考虑工件加工时间不确定性的模糊分布式柔性作业车间调度问题(fuzzy Distributed Flexible Job Shop Scheduling Problem,fDFJSP),将加工时间用三角模糊数表示,以最小化最大模糊完工时间为优化目标,提出一种改进的人工蜂群算法进行求解.针对fDFJSP的分布式特点,设...     

恒压恒频PWM变换器nk±m次谐波重复控制策略

提出了一种nk±m次谐波重复控制器用于提高恒压恒频PWM变换器系统的性能.该重复控制器可针对不同场合的需求,赋予n和m以不同的数值,从而实现对任一指定的nk±m次谐波的无静差跟踪或扰动抑制.与常规重复控制器相比,该重复控制器具有时间延迟小、收敛速度快、数字实现所需的内存单元少、表达式通用等优点.最后,给出了一个将nk±...     

组合蓄能独立式风力发电系统

提出了一种全新的采用组合蓄能方式的独立式风力发电系统.该风力发电系统采用电解水制氢与蓄电池相结合的组合蓄能方式,能够实现连续稳定自治运行且零排放、无污染,克服了采用单一蓄电池蓄能方式的系统或无法连续运行或需借助有污染的柴油机组辅助发电、或因采用泻荷装置而使系统效率过低等一系列问题.为优化系统的运行并准确估算系统元件的规...     

Statistical analysis of electron transfer dissociation pairwise fragmentation patterns

Electron transfer dissociation (ETD) is an alternative peptide dissociation method developed in recent years. Compared with the traditional collision induced dissociation (CID) b and y ion formation, ETD generates c and z ions and the backbone cleavage is believed to be less selective. We have reported previously the application of a statistical data mining strategy, K-means clustering, to discover fragmentation patterns for CID, and here we report application of this approach to ETD spectra. We use ETD data sets from digestions with three different proteases. Data analysis shows that selective cleavages do exist for ETD, with the fragmentation patterns affected by protease, charge states, and amino acid residue compositions. It is also noticed that the c(n-1) ion, corresponding to loss of the C-terminal amino acid residue, is statistically strong regardless of the residue at the C-terminus of the peptide, which suggests that the peptide gas phase conformation plays an important role in the dissociation pathways. These patterns provide a basis for mechanism elucidation, spectral prediction, and improvement of ETD peptide identification algorithms.