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The coverage region of WLAN network is limited compare with cell phone system such as GSM and WCDMA. The favorable area to deploy WLAN is the area which has strong demand for wireless network. How to identify the needs and guide the deployment of WLAN, that isn't a easy issue. It will waste the investment if we deploy the WLAN in improper places. This paper proposes a solution which can collect customer...
The transformer parallel operation can improve effectively the grid operation, protect critical loads power supply reliability and quality. Conditions of transformer parallel, focusing on computational analysis the differences of short-circuit impedance and transformation ratio, causes transformer circulation and the sharing loads of the transformer parallel. At the same time, it applied to the project...
Gale Crater on Mars has the layered structure of deposit covered by the Noachian/Hesperian boundary. Mineral identification and classification at this region can provide important constrains on environment and geological evolution for Mars. Although Curiosity rove has provided the in-situ mineralogical analysis in Gale, but it restricted in small areas. Compact Reconnaissance Imaging Spectrometer...
Channel estimation is an important link in the receiver of TD-LTE system, it's accuracy that directly affects the system performance. Research and analysis of Channel estimation are proposed based on pilot signal. The paper especially discusses taking advantage of LMMSE algorithm based on QR decomposition. At last, an implementation approach is proposed in this paper. The running results verify that...
This study develops an intelligent wireless indoor positioning system (IPS), which includes new beam antenna design and modified probabilistic neural network based positioning algorithm. The six directional antennas can obtain the angle between an object and the station. Then, a modified probabilistic neural network is applied to estimate the accurate position of the object with the signal strength...
This paper presents a comprehensive hydraulic test bed computer automatic control system based on industrial personal computer and programmable logic controller. The system mainly consists of hydraulic test data acquisition, data processing and test process automatic control through communication between PC and lower machine.
In order to research the relationship between installation errors and the calibration accuracy of error model coefficients of gyro accelerometer which is tested on centrifuge, concerned coordinate systems are established at first, and the influences of installation errors on the input specific force of the accelerometer and the angular velocity of the accelerometer's shell are calculated by using...
The calculation method of landslide stability is a critical issue to landslide research. Because the landslide is an unbalanced and unstable complex system, meanwhile the interactions among the various factors that composed a landslide are uncertain and random, the landslide stability calculation method based on probability becomes the future trend. This paper presents a new landslide stability calculation...
This paper investigates the problem of optimal power allocation for radar network to improve the system low probability of intercept (LPI) performance. We first introduce radar network signal model, and derive Schleher intercept factor for radar network. Then, with the defined target threatening level, two optimal power allocation algorithms are proposed. The first one is to optimize transmitting...
The available state-based and path-based reliability models for the component-based software consume high computational cost and suffer from the evaluating complexity in the software evaluation. A SVM reliability evaluation model for component-based software systems (SVMREM) with a low complexity is presented in this paper. The component reliability SVM is performed to optimize the reliability evaluation...
Digital predistortion is an effective method to compensate for nonlinear distortion of power amplifier. In order to improve the linearization performance of digital predistortion, an accurate loop-delay estimation method is proposed. This method can overcome the impairment caused by the nonlinear distortion of power amplifier, and it has higher accuracy and lower computation complexity than the previous...
Currently, most of the logistics companies use manual sorting method to complete the sorting work. However, with the rapid development of commodity economy, there is a trend that the demands direction of development towards small-volume and multi-species. With the increased species and large quantity of commodities, the sorting task has become increasingly heavy. In this paper, RFID tags are used...
One of the most important direction of bioinformatics is the genome structural variation discovery. In this paper, firstly we explain four sequencing-based methods, i.e., Read-pair, Read-depth, Split-read and Assembly. Secondly, the advantage and disadvantage of the approaches are discussed. Thirdly, the combination of the methods is proved to be a better one. Finally, a novel combined strategy was...
In order to precise control diesel engine throttle of pumping station, the mathematical model of the control system with DC stepper motor as actuator was established, and the fuzzy adaptive PID control strategy was selected. The control strategy for DC stepper motor was optimized to adjust throttle opening by motor angle. The response time was changed from 0.42s to 0.16s through the simulation analysis...
Periodic rectangle defected ground structure (PRDGS) is a class of frequency selective surfaces (FSS) and it can be widely applied in microwave circuits in order to obtain high performance circuits. The influence on transmission characteristic of PRDGS is calculated by the finite difference time domain method (FDTD) when the PRDGS has the different dielectric constants and the different rectangle...
Power distribution system is one of the important parts of smart grid. Due to its large scale, only a small part in power distribution system employs optical fiber infrastructure. In this paper, we propose an architecture of hybrid short distance RF and wide band communication. We analyze why these two technologies complementary well in power distribution level. We summarized three short distance...
Cloud computing, which has emerged as one of the most influential paradigms in the IT industry in recent years, is powered by the concept of virtualization technology. For achieving energy efficiency, load balancing and high availability of physical server in Cloud Data Center, the virtual machines should be migrated from one physical server to another. During the migration process, some steps should...
In Vacuum Oxygen Decarburization(VOD) steel refining process, the endpoint carbon content and endpoint temperature are criteria for smelting products. A VOD model is often needed to predict the endpoint data. During the modeling of VOD, some parameters are difficult to chose, thus affects the model prediction accuracy. Based on the VOD mathematical model, the process is analyzed to chose the main...
With the advent of technology and the rapid development of network applications, network security issues become a priority need to consider a variety of network applications, in a variety of spoofing attacks, how to prevent spoofing TCP session hijacking became the focus of network intrusion prevention one. This article first explains the concept of TCP session hijacking, and its principle and the...
The inspection of power transmission line is very important to ensure the safety of our daily life, and the use of remote sensing system in power transmission line inspection is a new research area in these years. Position and orientation measurement System (POS) is a kind of equipment that is used to provide accurate attitude and position information of the remote sensing system. The dynamic error...
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