Hybrid multiple-antenna transceivers, which combine large-dimensional analog pre/postprocessing with lower-dimensional digital processing, are the most promising approach for reducing hardware cost and training overhead in massive MIMO systems. This article provides a comprehensive survey of various incarnations such structures that have been proposed literature. We provide taxonomy terms required channel state information, is, whether processing adapts to instantaneous or average...

In order to realize the automatic detection of surface defects lithium battery pole piece, a method for and identification piece based on multi-feature fusion PSO-SVM was proposed in this paper. Firstly, image subtraction contrast adjustment were used preprocess defect weaken influence non-defective areas enhance features. Then, Canny algorithm AND logical operation extract area. Next, texture feature, edge HOG feature combined area image. Finally, support vector machine (SVM) optimized by...

Improving the isolation between antenna elements in compact arrays has been a major focus of recent research. In this paper, we present ideas to improve wideband closely spaced antennas. We do by connecting lumped lossy (resistive) feeds. A simple analytical expression is provided compute impact resistive on efficiency analyze power lost element. Three configurations decoupling circuits are designed and fabricated for two monopoles operating at 2.4 GHz. The circuit contains transmission...

Background The synergistic epidemic of diabetes mellitus and tuberculosis (DM-TB) has created a dual disease burden, challenging global health systems with complex pathophysiological interactions suboptimal treatment outcomes. To decode the evolving research landscape, this study presents latest comprehensive bibliometric analysis mapping intellectual architecture DM-TB over three decades. Methods We systematically analyzed 791 peer-reviewed articles from Web Science Core Collection...

The rail surface crack-detecting system was designed for reducing railway accident due to crack. adopts linear charge coupled device (CCD) TCD1208AP as image sensor, uses high-speed flash A/D converter AD7821 collect CCD output video signals, and CPLD perform timing generator, data storage other control logic. Then DSP executes the processing, such noises elimination, edges detection, segmentation linking, used improved classical algorithm morphology judge whether signals are crack or not,...

Abstract We report the fabrication of 304 stainless steel by laser rapid prototyping harmonized with high‐frequency micro‐forging and demonstrate that both microstructure properties prepared samples can be enhanced significantly. Structurally, we find large regular dendritic broken into pieces internal defects are to some extent eliminated. Moreover, grains refined remarkably. As a consequence such structural modification, mechanical found considerably demonstrating much broader fluctuation...

In this paper, a new adaptive step-size CMA blind equalization algorithm has been proposed to enhance the performance of constant modulus (CMA) for time-varying channel. The sequence is adjusted by autocorrelation error signal. provides fast convergence at early stages iteration while ensuring small final misadjustment. Simulation results comparing and conventional confirm algorithm's improved performance.

Online tracking is a challenging task to develop effective and efficient models account for appearance change. However, most algorithms only consider the holistic or local information do not make full use of information. In this study, novel algorithm with sparse representation proposed online classifier learned discriminate target from background. To reduce visual drift problem which encountered in object tracking, two‐stage method proposed. The used estimate initial position, determine...

Hybrid multiple-antenna transceivers, which combine large-dimensional analog pre/postprocessing with lower-dimensional digital processing, are the most promising approach for reducing hardware cost and training overhead in massive MIMO systems. This paper provides a comprehensive survey of various incarnations such structures that have been proposed literature. We provide taxonomy terms required channel state information (CSI), namely whether processing adapts to instantaneous or average...

Through analyzing of the delay composition message transmission in CAN bus, it discusses two main parts information network¿Fthe frame and media access delay. The is determined by length baud rate, so we can reach different under structure rate. latitudinal longitudinal comparison, analyses on situations. And mainly caused protocol themselves. We improve site's priority dynamic algorithm. In this paper ,module increase analyzed. This method sites priority, that real time network will be improved.

Intensity inhomogeneity may cause considerable difficulties in segmentation of CT image. In order to overcome the caused by intensity inhomogeneity, region-scalable fitting (RSF) model was put forward. RSF draws upon

This paper proposes an iris recognition algorithm based on 2D zero-crossing detection and similarity classifier. Whole system is consisting of eye image capture, boundary localization, region normalization, feature extraction, pattern match, yes/no decision. In extraction stage, normal filtered by using low frequency filter firstly, then the texture features are extracted operator, at last encoded into binary template. Iris match can be computed computing degree templates. Goodness-of-match...

The combination of integer lifting wavelet transform with set partitioning in hierarchical trees algorithm has been widely used the field image compression. Based on this algorithm, paper presents a coding lower memory and higher speed. further takes Human Visual System into consideration modifies SPIHT is according to characteristic weighted coefficients. Experiment result shows that, under situation low bit-rate, new can prove visual effect reconstructed at certain degree. In addition,...

In this paper, a novel active antenna array is proposed for TD-LTE base station system. This includes two parallel eight-element uniform linear sub-arrays the dual polarization operation and provides usable bandwidth of 100 MHz. Beamforming in vertical dimension achieved which improves performance cellular mobile communication systems. Each radiation element integrated with complete transceiver to reduce cable loss. transmitter capable generating up 21 dBm output power. receiver signal path...

Detecting a high-quality moving object with good robustness in computer vision system has important significance for follow-up task. Researching on the traditional algorithm, this paper proposes background reconstruction algorithm based modified k-means clustering and Single Gaussian model which could provide an accurate image through sequence of scene images foreground objects. Then statistical characteristics pixels region detects object. Aiming to effect dynamic changes environment,...

In this paper, magnesium matrix hydroxyapatite composite material was prepared by electrophoretic deposition method. The optimal process parameters of were HA suspension concentration 0.02 kg/L, aging time 10 days and voltage 60 V. Animal experiment SBF immer sion used to test the biocompatibility bioactivity respectively. SD rats divided into control group implant group. surrounding tissue taken do biopsy, HE dyed organizational analysis after a certain amount in rat body. biological soaked...

This paper is devoted to the problem of Multi-face localization on embedded DSP image processing system. The application face becoming important in machine vision, systems video monitoring and security access Skin color acts as an cue for segmentation, tracking face. We capture system build a skin-color model detection using three components original data YUV space. Combining character system, multi-face locating method based improved connected labeling algorithm presented this paper....

Multiple-Input-Multiple-Output (MIMO) technology plays an important role in the fourth generation and future wireless communication systems to meet exploding capacity requirements. In conventional MIMO approaches, antenna elements are placed far away from each other eliminate correlation make use of spatial multiplexing. However, this advantage offered by comes at price losing beamforming ability smart system. We propose a new technique for with active phased array transmitter/receiver which...

A compact T-shaped network for decreasing the port-to-port coupling between two strongly coupled antennas is investigated. The proposed circuit comprises of a pair transmission lines followed by lumped element connected feeds antenna. Finally, simple L-section matching added to each port retune input impedance matching. gives dual-resonant decoupling performance achieving isolation levels 20 dB across 250 MHz bandwidth at 2.4GHz. length line designed introduce trade-off level and bandwidth....