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排序方式: 共有232条查询结果,搜索用时 734 毫秒
1.
为提升城市排水系统运行的效率和质量,开发设计了基于GIS的"源—网—厂—河"一体化智慧排水系统,其层次结构包括基础层、感知层、网络层、应用层.应用层是整个智慧排水系统的核心组成,主要包含六大模块——排水许可信息化管理、拓扑分析、健康评估、终端监测、模型计算及动态巡检.应用该系统构建排水系统模型计算,集成终端在线监测校核分析,分析诊断排水系统健康问题和拓扑问题,定位病害区域,自动制定最优巡检方案,分配派单于外业,外业巡检结果反馈回智慧排水系统,最终实现城市排水一体化智慧管理. 相似文献
2.
Neural-Network-Based Near-Optimal Control for a Class of Discrete-Time Affine Nonlinear Systems With Control Constraints 总被引:6,自引:0,他引:6
Huaguang Zhang Yanhong Luo Derong Liu 《Neural Networks, IEEE Transactions on》2009,20(9):1490-1503
In this paper, the near-optimal control problem for a class of nonlinear discrete-time systems with control constraints is solved by iterative adaptive dynamic programming algorithm. First, a novel nonquadratic performance functional is introduced to overcome the control constraints, and then an iterative adaptive dynamic programming algorithm is developed to solve the optimal feedback control problem of the original constrained system with convergence analysis. In the present control scheme, there are three neural networks used as parametric structures for facilitating the implementation of the iterative algorithm. Two examples are given to demonstrate the convergence and feasibility of the proposed optimal control scheme. 相似文献
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针对传统ECT/ERT成像系统中连接数据采集部分和成像终端的连线复杂、抗干扰能力差等问题,设计了一种基于无线模块nRF24L01进行数据传输的ECT/ERT双模态成像系统;介绍了基于无线传输的ECT/ERT双模态成像系统硬件结构,采用一种简化的基于跳频的无线传输通信协议,该法可以在多台同频干扰机发送的环境下较好地避免采集数据受干扰,并实现每秒50帧数据传输;实验结果表明,采用无线跳频技术可以解决工业现场的干扰,使测量数据准确快速地传输到成像终端。 相似文献
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The purpose of the paper is to present an adaptive control method for the synchronization of different classes of chaotic neural networks. A new sufficient condition for the global synchronization of two kinds of chaotic neural networks is derived. The proposed control method is efficient for implementing the synchronization when the parameters of the drive system are different from those of the response system. A numerical example is used to demonstrate the validity of the proposed method and the obtained result. 相似文献
7.
Note that the conservatism of the delay-dependent stability criteria can be reduced by increasing the integral terms in Lyapunov–Krasovskii functional (LKF). This brief revisits the stability problem for a class of linear time-delay systems via multiple integral approach. The novelty of this brief lies in that a Wirtinger-based multiple integral inequality is employed to estimate the derivative of a class of LKF with multiple integral terms. Based on these innovations, a new delay-dependent stability criterion is derived in terms of linear matrix inequalities. Two numerical examples are exploited to demonstrate the effectiveness and superiority of the proposed method. 相似文献
8.
Qihe Shan Huaguang Zhang Feisheng Yang Zhanshan Wang 《Soft Computing - A Fusion of Foundations, Methodologies and Applications》2013,17(11):2043-2052
This paper investigates the globally asymptotical stability problem for a general class of Cohen-Grossberg neural networks with multiple mixed time-delays. Before proving the main theorem, a more generalized convex combination inequality is proposed. A new stability criterion for Cohen-Grossberg neural networks with multiple time-varying delays is obtained by the employed general inequality technique. Two examples are included to illustrate the effectiveness of the presented results. 相似文献
9.
Physical Properties of Soybean Oleogels and Oil Migration Evaluation in Model Praline System
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![点击此处可从《Journal of the American Oil Chemists](/ch/ext_images/free.gif)
Huaguang Si Ling-Zhi Cheong Jianhua Huang Xingguo Wang Hong Zhang 《Journal of the American Oil Chemists' Society》2016,93(8):1075-1084
The present study examined the physical properties of soybean oleogels and commercial confectionery filling fats and evaluated the oil migration properties in model praline systems. Soybean oleogels were prepared using different oleogelators namely monoglyceride (MAG oleogels) and a mixture of sorbitan tri‐stearate (STS) with lecithin (50:50) (Lec‐STS oleogels). Both MAG oleogels and Lec‐STS oleogels demonstrated a flat solid fat content (SFC) profile with zero SFC at 40 °C. At low temperature, MAG oleogels and Lec‐STS oleogels demonstrated a non‐flowing gel‐like property due to the ability of the oleogelator to entrap liquid oil. In addition, oleogels also showed thixotropic behavior indicating the possible capability to prevent migration of filling fats to coatings and also good flow ability during pumping though manufacturing equipment. The textural property of oleogels also did not change significantly upon storage indicating good structural stability. When used as in a model praline system, oleogels demonstrated a migration delaying property. 相似文献
10.
孙华光 《化学工业与工程技术》1998,19(4):18-20
对低温乙烯贮存装置闪蒸气压缩机振动原因进行了分析。并据此提出了减小振动的措施,从而使压缩机得以稳定运行,且延长了运行周期。 相似文献