Indoor air quality is an important factor in people's *** particular,as ward,office,classroom and other sealing effect is good,relatively small *** it is very important to monitor the indoor air *** system real-ti...
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ISBN:
(纸本)9781509046584
Indoor air quality is an important factor in people's *** particular,as ward,office,classroom and other sealing effect is good,relatively small *** it is very important to monitor the indoor air *** system real-time monitoring of indoor air quality in a number of physical *** CC2530 chip as the core *** the Zigbee wireless communication module to form a wireless data communication network,upload the collected *** Lab View designed PC monitoring software,according to the set value to effectively monitor and *** system has raised people's concern for the indoor living environment quality and to consider the impact of the environment on our own health,which provides a new monitoring framework for indoor environment comfort system.
A wireless mobile environmental monitoring system based on spherical amphibious robots is proposed in this paper, which is used to monitor environmental data in aquaculture. The control interface is designed by using ...
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A wireless mobile environmental monitoring system based on spherical amphibious robots is proposed in this paper, which is used to monitor environmental data in aquaculture. The control interface is designed by using labVIEW to display the collected environmental data. The XBee module is used to realize the wireless communication between robot and PC. The robot is equipped with temperature and humidity sensors, pressure sensors and high-definition cameras to collect environmental information. An adaptive weighted fusion algorithm is proposed for deal with the multi source data collected by multiple robots and improve the accuracy of data. In this paper, the underwater kinematic model of amphibious robot is established, and the proportional-integral-derivative(PID) controller is designed to control the depth of spherical amphibious robot. The simulation and experimental results verified the effectiveness of the system.
In order to overcome the shortcomings of traditional BP (Back Propagation) in the process of evaluation for continuous speech jamming effect, a method based on QGA (Quantum Genetic Algorithm) is proposed to optimize t...
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In order to overcome the shortcomings of traditional BP (Back Propagation) in the process of evaluation for continuous speech jamming effect, a method based on QGA (Quantum Genetic Algorithm) is proposed to optimize the BP network for objective evaluation of speech jamming effect. The MFCC feature of continuous speech data under different distortion conditions are extracted by the Mel cepstrum, which are set to the model inputs in the QGA-BP method. Then the QGA is used to optimize the weight and threshold of BP neural network from multiple spots. A QGA-BP model is constructed to accomplish the mapping from the input to the Mean Opinion Score (MOS). Representative speech data is used to verify this method, and the results show that the convergence speed of QGA-BP model is improved compared with the traditional BP network. Meanwhile, the convergence error can be effectively controlled within 4%, and the model correlation coefficient and the standard deviation are closer to the ideal parameters.
In terms of fault diagnosis of liquid-propellant rocket engine, the fault diagnosis accuracy of the traditional method is low the characteristics of engine fault data are small sample and nonlinear variation. In order...
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In terms of fault diagnosis of liquid-propellant rocket engine, the fault diagnosis accuracy of the traditional method is low the characteristics of engine fault data are small sample and nonlinear variation. In order to improve the accuracy of sensor fault diagnosis and overcome the scarcity of related samples, the particle swarm optimization(PSO) with strong global searching ability is used to optimize the LS-SVM parameters, and the LSSVM optimal parameter values are obtained by iteration to improve the model fitting accuracy and generalization ability. At the same time, the traditional support vector machine and BP neural network model are used for the detection. The simulation results show that the least squares support vector machine(SVM) detection method based on particle swarm optimization has the advantages of high precision and high speed. It has certain effect and positive significance for improving the safety of liquid-propellant rocket engine test and engine failure loss.
The number of wind installations has grown worldwide at unprecedented rates in recent years. As well, the average size of the installations has increased due to the advent of larger capacity machine, variable speed te...
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The number of wind installations has grown worldwide at unprecedented rates in recent years. As well, the average size of the installations has increased due to the advent of larger capacity machine, variable speed technology, and an increasing number of off-shore sites. As a clean, renewable and small footprint's new green energy, development and utilization technology of wind power energy is mature, so it has been developed and utilized in the world. This overview describes the advantages of using wind power, status of development of China and foreign wind power, the development of wind power technology and the future trend of wind power. Provide a reference for people to better understand the current situation and development trend of the world's wind power generation.
Nowadays, with the improvement of buildings leakprofness and indoor decoration materials' widely use in sealing, household air quality has been the object of attention. So we combine the Zig Bee wireless communica...
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Nowadays, with the improvement of buildings leakprofness and indoor decoration materials' widely use in sealing, household air quality has been the object of attention. So we combine the Zig Bee wireless communication technology with sensor detection technology and a set of multipoint real-time monitoring system of household air quality based on Zig Bee is designed. CC2530 chip microprocessor as the core, system adopt master-slave structure. Its sensor nodes from the machine collect air environmental data, air temperature and humidity sensor nodes to real-time transmission to the host gateway nodes and summary. Master machine combined with monitoring data to determine and display the whole household air quality status, so as to realize the state monitor alarm, and then take measures to improve air quality.
Network-based controlsystem has been an emerging technology in the control and communication fields in recent *** is a key step to achieve bandpass transmission,especially for the wireless ***,an important component ...
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Network-based controlsystem has been an emerging technology in the control and communication fields in recent *** is a key step to achieve bandpass transmission,especially for the wireless ***,an important component in network-based controlsystem,has the detrimental effect on the system performance in some *** the paper,first,it is shown that the modulation can result in time delay existing not only between sensor and controller,but also between controller and ***,system stability is analysed,and a robust H resilient controller restraining controller gain perturbance is designed based on the LMI ***,a numerical simulation is used to demonstrate the effectiveness of the designed controller.
Organic Rankine Cycle (ORC) is an effective technology to recovery low grade waste heat from exhaust gas. Many advantages of ORC are high efficiency, simple system, low pressure of working to seal, environment friendl...
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ISBN:
(纸本)0934412219
Organic Rankine Cycle (ORC) is an effective technology to recovery low grade waste heat from exhaust gas. Many advantages of ORC are high efficiency, simple system, low pressure of working to seal, environment friendly and so on. A novel control algorithm called Active Disturbance Rejection control (ADRC) is applied to vapor temperature control at the outlet of evaporator of organic Rankine cycle (ORC) system. The disturbances imposed on the waste heat recovery system are estimated through an extended linear state observer and then compensated by a linear feedback control strategy, it can eliminate disturbance via disturbance compensation independent of the accurate mathematical model of the plant. It is reliable, efficient and simple. Simulation examples demonstrate the simplicity of the design procedure and the good tracking performance.
In this paper, the organic Rankine cycle (ORC) in waste heat utilizing process is investigated. In order to study the performance of the ORC system, the method of mechanism analysis is applied in modeling. In order to...
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ISBN:
(纸本)0934412219
In this paper, the organic Rankine cycle (ORC) in waste heat utilizing process is investigated. In order to study the performance of the ORC system, the method of mechanism analysis is applied in modeling. In order to achieve both transient performance and steady-state energy saving, a control strategy is proposed for the system by incorporating a Fuzzy control with a PID controller. MATLAB software of Simulink toolbox is applied in this system to study the dynamic characteristics of the object to adapt to parameter changes and anti-interference of control object. Simulations demonstrate that the proposed strategy can obtain satisfactory performance.
This research is aimed at the optimization of industrial water distribution technology. Through the establishment of water quality model, the parameters which have greater influence on the water quality are chosen. Th...
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