One-bit maximum likelihood algorithm for sensor networks in non-ideal channels by Nana WANG, Zhaoting LIU, Yingbiao YAO

“…Wireless sensor networks typically consist of wireless sensor nodes that are distributed in a certain spatial range.In general,the energy storage,computing and communication capabilities of nodes are extremely limited.Direct transmission of the sampled signals of the various nodes to the fusion center will result in more energy consumption and greater network communication load.If the sampled signal value of each sensor node is compressed into a one-bit measurement value and then transmitted,the energy consumption and the communication load can be greatly reduced.The parameter estimation problem based on one-bit measurement of sensor networks in multiplicative noise environment was studied.Considering the non-ideal binary channel with interference between the node and the fusion center,a parameter estimation algorithm based on maximum likelihood was proposed,Cramér-Rao lower bound of the parameter estimation was analyzed,and the effectiveness of the algorithm was verified through a series of simulation experiments.…”
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Influence of Internal Quality of Gear on Strength and Life of Gear by Xiaolu Zhu

“…Finally， the <italic>R-S-N</italic> curve test data（gear decarburization layer depth 0.2~0.3 mm， the bending endurance limit stress <italic>σ_F</italic>_lim at tooth root is reduced by 23%~50%） of carburizing and quenching gears with 5 materials show that the great influence of gear surface decarburization on gear bending fatigue strength.…”
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A joint optimization algorithm based on energy efficiency maximization for massive MIMO systems by Haiyan CAO, Ruirui FENG, Xin FANG, Xiumin WANG, Fangmin XU

“…For the massive multi-cell multi-input multiple-output (MIMO) communication uplink system with unknown channel status information,a resource allocation algorithm which jointly optimizes the pilot sequence length,pilot symbol power and data symbol power was proposed.With the maximum ratio combining (MRC) receiver,the influence of circuit power was considered,pilot contamination and the constraint of maximum transmission power,and a nonconvex function modeled with the goal of maximizing energy efficiency (EE) was established.Firstly,the fractional form was transformed into an equivalent subtractive form by using the properties of fractional programming and then decomposed into a series of DC problems,finally,by using an iterative optimization algorithm,the three variables were alternately adjusted with maximizing the energy efficiency.Simulation results show that with the increasing of the maximum symbol transmission power,the proposed scheme can still have the great EE performance for the massive MIMO systems.…”
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Diagnosis of Planetary Gearbox Crack Fault based on Torsional Vibration Signal Windowed RMS Time-domain Synchronous Averaging by Wei Wei, Yunpeng Li, Jingyuan Liang

“…Compared with traditional transverse vibration signal，torsional vibration signal is not affected by the modulation of time-varying transmission path in theory，it has great advantages，so its frequency component is simple and it is easy to extract fault features. …”
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Uma abordagem de geomarketing do esporte by Loïc Ravenel

“…After having replaced sports geography research in their scientific context, a definition of geomarketing is proposed, insisting on the specificity of the sporting services. Three great fields of interventions are then identified as of the working tracks which combine expectations of the actors with geographical new prospects.…”
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EFFECT OF RANDOM FIBER DISTRIBUTION ON LONGITUDINAL COMPRESSIVE BEHAVIOR OF COMPOSITE MATERIALS by ZHANG Li, XU Dong, ZHANG ShuFeng, JIANG YuanXiang

“…Random fiber distribution may lead to randomness of longitudinal compressive behavior of fiber reinforced plastics（FRP）.To mimic random fiber distribution over the cross-section,a new algorithm named Latin Hypercube Sampling based on Random Sequential Expansion（LHS-RSE） is proposed,which can simulate the random fiber distribution of FRP with fiber volume ratio as high as 70%.Then,3 D FE model with random fiber distribution of unidirectional fiber reinforced plastic T300/914 is developed in Abaqus/Standard to investigate the influence of random fiber distribution on the compressive behavior.It is shown that random fiber distribution over cross section greatly compromises the longitudinal compressive strength of FRP.Random distribution of longitudinal compressive strength resulted by random fiber distribution tends to follow normal or lognormal distribution.…”
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Time series data based AI operation and maintenance system of cloud network collaboration platform by Ruiying CHENG, Pan ZHANG, Yu XIAO, Yujie QIAO, Anyi ZHANG

“…“Cloud-network collaboration” and “micro-service” are important trends in the evolution of enterprise cloud platforms.As the importance of enterprise information construction continues to rise, the operation and maintenance of the microservice-oriented cloud-network collaboration platform faces great challenges.The challenges faced by the operation and maintenance were analyzed, the requirements for artificial intelligence operation and maintenance of the platform were sorted out, a technical system for artificial intelligence operation and maintenance of the platform based on time-series data analysis was proposed, and an artificial intelligence operation and maintenance subsystem for the cloud network collaborative platform was designed.The proposed technical system and system design are practical and generalizable, and can be used as a reference for the technical approach of enterprise cloud platform construction and optimization.…”
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España y el golpe de estado contra De Gaulle by Karima Aït Yahia

“…Our analysis also makes clear that in terms of foreign policy there was great diversity of opinion within the regime, since the more liberal newspapers wholeheartedly supported de Gaulle, as the legitimate president of the French Republic.…”
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Contemplation of the Body by Ivan Platovnjak

“…He argues that the Triune God wants to reveal Himself to every man, not only through the book of nature and the Bible, but also through his body, and that contemplation of his body can be of great help to him in this. In the first chapter he briefly defines the meaning of contemplation and then turns to an understanding of the human body in the light of Scripture and spiritual theology. …”
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A model of RD-IHSAT rumor dissemination based on coupling network by Yishi HAN, Yuxin XU, Tiantian LU

“…To explore the spread of rumors in social network, based on the principles of coupling network, the model of RD-IHSAT was established on Barabási-Albert (BA) scale free network and Watts-Strogatz (WS) small world network.The classic model of SIR was optimized, by combining it with three concerns, the interest decay, the social consensus and the spiral of silence effect, and adding four roles, hesitated, adherent, reticent and debunker.Results of numerical simulations are as follows: an information outbreak can be triggered by coupling network, not only the spreading speed but the scale as well; the dissemination can be markedly suppressed when the probability of rumor-refuting for the hesitated and spreaders arises; the chances of transition from spreaders to adherents drop; increasing the proportion of silent groups is a key part of curbing the spread of rumors; the control of the time lag in refuting rumors will greatly affect the effect of refuting rumors.…”
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An efficient load balancing algorithm for virtual machine allocation based on ant colony optimization by Peng Xu, Guimin He, Zhenhao Li, Zhongbao Zhang

“…With the rapid development of information technologies and the popularization of Internet applications, more and more companies and developers pay great attention to the cloud computing. As one of the most significant problems in cloud computing, virtual machine allocation has attracted significant attention. …”
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DISTANCE LEARNING AT UNIVERSITY by Tatiana N. Andryukhina

“…Modern higher education in Russia turns great attention on application in educational process of various technologies of information transfer. …”
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Simulation of Virtual Prototype and Research of Transmission Accuracy for RV Reducer by Liu Huaming, Qin Xunpeng, Huang Jinjing, Wu Rui

“…The 8 groups virtual prototype models with consideration of the error are given,the simulation results show that the error of the pin radius,the modification of the cycloidal gear tooth profile and the error of the center circle of the pin have a great influence on the transmission accuracy. The research conclusions provide a theoretical basis for the design of RV reducer.…”
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Design and Position Analysis of a 2T1R Parallel Mechanism with Bending Translation Characteristics by Gao Bo, Shi Zhixin

“…This mechanism can be achieved through only one-dimensional translation, greatly simplifying the complexity of the mechanism and the difficulty of the control algorithm.…”
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Social Media Marketing in the Yorùbá Video Film Industry by Olagoke Alamu

“…The loose market structure in the industry also deters marketers from maximally utilizing the great potentials social media marketing offers. Recommendations are made for improvement. …”
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An unusual case of vomiting and arthritis: A diagnostic enigma by Shivraj Padiyar, Daisy Doley, Ramesh Babu, John Mathew

“…After ruling out infectious causes a diagnosis of sarcoidosis was made, and the patient had a full recovery with steroids and methotrexate. Sarcoidosis can be a great mimicker presenting with a myriad of complications. …”
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A hybrid indoor localization algorithm based on RSSI and inertial navigation by Yaping ZHU, Weiwei XIA, Yueyue ZHANG, Feng YAN, Xuzhou ZUO, Lianfeng SHEN

“…To cater for the requirements of high-precision indoor localization algorithms,a hybrid indoor localization algorithm based on received signal strength identification (RSSI) and inertial navigation was proposed.This algorithm used fingerprint identification algorithm to localize the agents,based on the RSSI values of ZigBee nodes in wireless sensor network.The algorithm combined the inertial information provided by inertial measurement units (IMU),to correct the RSSI localization results.This algorithm used Kalman filter and adopted state equations to describe the dynamic change rules of agents’ positions,thus it achieved a hybrid localization algorithm which relied WSN localization first and IMU last.Simulations evaluate that the proposed algorithm can improve the localization performances of algorithms which adopt RSSI localization and inertial navigation individually,and can greatly improve localization accuracy.…”
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The influence of crack tip shielding on fatigue crack propagation by Anghel Cernescu

“…One of the phenomena with great influence on the fatigue crack propagation character is the crack tip stress shielding phenomena. …”
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Axillary Brachial Plexus Block by Ashish R. Satapathy, David M. Coventry

“…Historically, single-injection techniques have not provided reliable blockade in the musculocutaneous and radial nerve territories, but success rates have greatly improved with multiple-injection techniques whether using nerve stimulation or ultrasound guidance. …”
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APPLICATION OF INNOVATIVE TECHNOLOGIES AT FOOD ENTERPRISES by N. D. Dmitriev, E. A. Rogozina

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