基于市场经济的生态网络能量管理服务

提出了生态网络模型中基于市场经济的能量管理服务策略。它以市场中心化原则和优胜劣汰原则为基础,通过消息通信的方式依靠市场机制来实现能量管理,并给出了实现实例。该能量管理策略为生态网络结构具有自适应性、可调整性、可生存性提供了一个基本保证,也将为Internet网络体系结构的资源管理的自治性、资源及其使用者的异构性、资源分配决策的分布性和并行性等问题提供一种有效的解决途径。     

汽油机分层废气再循环与稀薄混合气燃烧

为探索汽油机清洁燃烧技术途径 ,设计了 5气门汽油机馅饼状分层充气系统 ,试验对比了在分层充气前提下的稀燃和废气再循环对发动机排放特性的影响 ,并研究了两者叠加后对发动机性能的影响。试验结果表明 ,采用分层充气方式能够使废气再循环率达到 3 2 % ;在相同进气充量时 ,废气再循环与稀燃对改善 NOx 排放的效果基本相同 ;稀燃与废气再循环相结合可以获得比单纯稀燃或单纯废气再循环更好的综合性能 ,使 NOx 和 CO排放均降低到化学计量比无废气再循环情况下的排放指标的 10 %以下。稀燃与分层充气废气再循环相结合 ,简便可行 ,为研发低污染发动机提供了新思路     

一种采用单照相机的三维人体测量方法

非接触式三维人体自动测量是现代化人体测量技术的主要特征,也是今后人体测量的趋势所在.在分析国内外非接触式三维人体测量方法的基础上,提出一种采用单照相机的三维人体测量方法.首先通过在单照相机前加一套镜面组合系统,进行实时拍照,获得一张同时记录人体的正面和侧面的照片;然后通过基于图像的人体特征区域和特征参数提取得到人体尺寸信息(尺寸、轮廓点和轮廓线).试验结果验证了此方法的可行性.     

Analytical Analysis on the Structure of a Typical Fuzzy On - Off Controller

The analytical structure of a typical fuzzy on - off controller that employs three or more triangular Input fuzzy sets, Zadeh fuzzy logic AND operator, fuzzy rules with singleton output fuzzy sets, and the centriod defuzzifier is Investigated in this paper. The analytical expressions of the variable gains of the fuzzy controller are derived. The resulting explicit structure shows that the fuzzy controller is accurately a nonlinear PD - like controller with gains continuously changing with system output in different regions of input space.     

Distributed Stretching Control of Web Production System

The stretching process,as a key phase of web production system,pursues the target velocities of rollers and the web tensions of spans between the successive rollers to guarantee proper stretching ratios. This requires the stable velocities and velocity ratios of large number rollers separated throughout the workshop. To this goal,a distributed cooperative controller is designed to coordinate the velocities of the rollers to the desired values as well as the target ratios between the upper and lower rollers. During the whole evolution,only the neighbor rollers can exchange the working information,and neither global information nor central controller is required. It is proven that all the rollers asymptotically achieve the desired velocity ratios via the proposed control law,which is also demonstrated by numerical simulation.     

如何正确测量血压

高血压是心血管疾病重要的独立危险因素。我国目前约有高血压患者1亿6千万,且发病率仍在持续增高。精确测量血压不但是诊断高血压最重要的检查手段之一,而且对于高血压的分类、危险分层以及指导治疗非常重要。不准确的血压测量会导致大量高血压患者的漏诊和误诊。本文就血压测量中的主要误差及产生原因,给临床医生和患者提供一些方法建议,以便达到血压的精确测量。     

一种面向网络突现计算的生物网络中间件的设计方法

在具有服务突现和进化能力的生物网络结构及其仿真平台的基础上,设计了一种新颖的面向网络突现计算和服务的生物网络中间件,详细讨论了生物网络中间件的组成部分及其设计和实现.该中间件可嵌入到现有的Internet网络体系结构中,使其能适合各种异构的网络环境和移动计算,实现网络突现服务和应用.     

带Smith预估器的模糊PID组织温度控制系统

针对激光热疗法中组织温度模型的纯滞后和大惯性,提出一种新颖的带Smith预估器的模糊PID控制系统.模糊PID控制器是由一个简单的模糊PI控制器和一个简单的模糊PD控制器并行结合而成.模糊PID控制器的增益通过解析推导与线性PID控制器的增益相联系.设计好的线性PID控制器的增益可用于在线设计模糊PID控制器.计算机仿真结果表明模糊控制系统在组织温度控制中比对应的线性PID控制系统鲁棒.     

Feed-Forward-Like Decoupling Control in Coagulation Bath of Carbon Fiber Precursor

The coagulation bath system of carbon fiber precursor is a complicated and multivariable coupling system. Based on the model of industrial production, the full dynamic decoupling control of the coagulation bath system of carbon fiber precursor is achieved in combination with multivariable feed-forward-like decoupling and proportional-integral-differential （PID） control. Compared with the conventional PID decoupling control, the experiment results show that the proposed method has a better control effect. The use of the controller can achieve complete decoupling of three parameters from coagulation bath system. The method should have great applications.     

Takagi - Sugeno Fuzzy PID Gain - Scheduling Controllers

This paper aims at Takagi - Sugeno (TS) fuzzy controllers as gain scheduling (GS) schemes of PID controllers. A TS fuzzy controller employs arbitrary input fuzzy sets, product or Zadeh fuzzy logic AND, TS fuzzy rules with linear consequent, and the generalized defuzzifler containing the popular centrold defuzzifler as a special case. We first establish the relationship between the TS fuzzy controller and the linear PID controller. The TS ftizzy controller is accurately a nonlinear PID controller with gains continuously changing with Its process output. Then we point out that the TS fuzzy controller is closely related to the traditional gain scheduler. The gains of the TS ftizzy controller are determined by three two - Input - one - output fuzzy systems with singleton output fuzzy sets. Finally, as a demonstration, a simple TS fuzzy controller employing two linear input fuzzy sets, Zadeh fuzzy logic AND, and the popular centrold defuzzifler is designed to be the gain scheduler for the PID controller. Com