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With the progress of science and technology, the digital receiver has been widely used in communication, radar, navigation system, electronic warfare system and enemy identification system. A new design of digital transceiver unit is proposed: A new method of signal synthesis and the use of cascading Invsinc filter and CIC filter in digital down conversion to achieve decimation and deceleration; can...
In this work, we adopt the use of deep learning method for no-reference image quality assessment. With the development of deep neural networks technology, foundational and deep features of images could be captured without much prior knowledge. So a sparse autoencoder (SAE) was trained to express a 32 × 32 pixels image into a feature vector. Then the original images were cut into serial sub-images...
In order to deal with the problem that the detection performance of sensor networks is easily subject to environmental influence, here proposed is a cooperative target detection algorithm of multi-sensor nodes based on adaptive iterative threshold which lies on Neyman-Pearson (N-P) Criterion: Each sensor node makes a preliminary decision, and processes an adaptive iterative threshold according to...
Signal quality analysis is an important way to ensure high quality of navigation service. Traditional signal time domain evaluation method cannot obtain the detail of signal waveform. This paper uses a method based on the chip measurements to solve this problem. At the same time, this paper proposes an algorithm to evaluate signal quality by using the chip measurement. Finally, this algorithm is used...
As a portable smart device, smartphone has been widely used in the field of hearing diagnosis. It can simplify the diagnostic procedure and provide a simple method for hearing diagnosis. However, smartphone is usually used as an audio source and operate conventional test algorithms, which takes a lot of time. We propose a new method for self-hearing diagnosis based on smartphone, which uses hearing...
In this paper, a novel classifier for classification problems, based on increment support vector data description, is proposed. The proposed method is the expand version of increment support vector data description by bring in two classes of sample. Because of the addition of two kinds of sample. This method can reflect the target sample distribution state more complete in super ball space. The results...
Multi-degree of freedom manipulators have become a hotspot in the field of robotics because of many advantages. In this paper, a 5-DOF manipulator was taken as the object of study. The modal analysis on it was carried out by methods of test and finite element analysis. A model updating method based on sensitivity analysis was put forward, and the final finite element model was established by iterative...
Hierarchical routing protocol has the advantage of good scalability for WSN network. However classic hierarchical protocol such as LEACH has the energy hole problem. In this paper, a distributed clustering scheme based on neighborhood energy level is proposed to handle this issue. Our scheme dynamically adjust the cluster head selection probability by considering difference between the residual energy...
The high-speed camera is an imaging device that records a particular transient state or all of the high-speed processes. It can accurately record the transient process of the high-speed target in real time and thus allow us to achieve the purpose of analysis of high-speed process through the slow motion playback. So the high-speed camera becomes an important tool for the study of the transient phenomena...
Here we study the shape, size, and merging pattern of the area following the toll barrier, from the five aspects including the accident prevention, throughput, cost, service time and passing capacity. We build the corresponding model of the new single-in and double_out toll station to measure the optimal solution of the toll plaza on the basis of a series of methods such as the factor analysis, principal...
With the accelerated urbanization process in China, more and more attention has been paid to residential environment quality. How to improve atmospheric quality, accelerate pollutant emission and reduce resource consumption by rationalizing layout is one of the most important issues in developing a healthy community. Based on the method of fluent flow field simulation, this paper chooses and analyzes...
Filtering recommendation system is always key and hot point in electronic commerce research; to obtain recommendation result with high accuracy, performance, universality and strong adaptation, improve recommended efficiency and veracity of collaborative filtering recommendation system and provide more personalized recommendation service for users, a kind of collaborative filtering recommendation...
The dynamic response analysis to simulate the complicated working condition can ensure the high reliability of space products' design. In this paper, we focus on the solar array of a satellite, and gain equivalent mechanical parameters of its internal honeycomb panel's construction. We build an accurate finite element model, and perform modal analysis and frequency response analysis as well. By contrast,...
As the joint spacing of layered and jointed rock masses has the characteristic of discontinuous distribution, building a network model reflecting the actual distribution of joint spacing will be the research basis for calculating and analyzing the mechanical behavior of layered and jointed rock masses. A tunnel under construction in Chongqing was chosen as the background for the engineering research...
With large scale construction of UHV AC / DC hybrid power grid and the "Big Run" system, the service area of the power network dispatch control system is expanding rapidly. The system is facing new challenges as the data source increased, data type diverted, data size and workload increased dramatically. There is a great demand on storing and retrieving of multi-source massive data. The...
In order to build the cross-department and cross-regional road network monitoring and security service platform and related system, we puts forward and research three levels of integration technology. The application of integrated technology is designed and developed to implement the comprehensive application demonstration system of road network management.
A hybrid least square support vector machine (LSSVM) is proposed to predict the boiler combustion efficiency. In this approach, a principal component analysis (PCA) is employed to reconstruct new variables as the input of the predictive model. Then, a particle swarm optimization (PSO) algorithm optimized LSSVM is proposed. The parameters of LSSVM are optimized dynamically by PSO and the output value...
A fault tolerant position estimation for Switched Reluctance Motor (SRM) is proposed in the paper based on relationship between inductance and rotor position. First, the particular position signal is obtained by comparing the real-time flux linkage with the particular position flux linkage, the position is estimated by the particular position signal. Second, the delay method is used based on inter-phase...
Wearable human motion monitoring has become a hot research topic in the field of smart wearable devices. In this paper, the principle of wearable human motion state monitoring has been analyzed and the historical development of wearable human motion monitoring has also been reviewed. This paper reviews the research status of human motion state monitoring. The present situation of wearable human motion...
Pedestrian detection is an important topic in object detection. Compared with other object detectors, YOLOv2 achieves high accuracy and fast speed for general object detection, however it degrades accuracy when detecting crowed pedestrians. In this paper, combining with the skip structure of FCN, we tailor the YOLOv2 network to improve the accuracy in detecting small pedestrians which appear in groups...
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