Reliability evaluation of wireless multimedia sensor networks based on instantaneous availability by Yi Yang, Sixin Wang, Wei Xu, Kunlun Wei

“…The failure is regarded as a percolation process, and the percolation threshold is taken as the failure indicator in this method. …”
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Parameter estimation of frequency hopping signal based on time-frequency matrix LCM by Jiamin LIU, Zhijin ZHAO, Junna SHANG, Xueyi YE

“…To improve the performance of the parameter estimation of frequency hopping signal under low signal-to-noise ratio, a parameter estimation algorithm of frequency hopping signal based on time-frequency matrix LCM was proposed.Considering the different characteristics of time-frequency distribution of frequency hopping signal and noise, the mean local energy comparison value of the time-frequency matrix under different scale sliding windows was used, and the multi-scale local energy comparison feature matrix was introduced, so the time-frequency matrix P that only contains the time-frequency information of the frequency hopping signal could be obtained through this feature matrix and the adaptive threshold separation.And then, by extracting the time-frequency hopping information from P, the period, hopping time and frequency of the frequency hopping signal could be accurately estimated.The simulation results show that compared with the traditional local contrast measure (LCM) and morphological filtering method, the proposed algorithm has better frequency hopping signal extraction effect and higher parameter estimation accuracy.And then the tests of the algorithm on the DSP+FPGA hardware system verify the effectiveness and practicability.…”
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齿侧间隙对齿轮副非线性振动特性的影响研究 by 李英明, 陈卫东, 陈奇, 黄康, 邱明明

“…The existence of the backlash can generate impact between teeth,which influences the stability of gear transmission.In order to comprehensive research on the influence of backlash on the gear vibration characteristics,the influences of backlash on the gear pair vibration and impact state under different meshing frequency and different loads are studied,through establishing the mathematical model of gear pair nonlinear vibration,and solving the model numerical simulation based on Runge-Kutta method,combined with time process diagram,phase diagram,Poincaré and FFT frequency spectrogram.The research shows that,the dynamics response of meshing frequency towards backlash is the nonlinear relationship,when the meshing frequency is fixed,within a certain range of backlash,gear chaos appears,out of that range,gear chaos does not appears.When the gear load is lighter,backlash is more likely to influence the vibration characteristics of gear pair,however,when the load is heavy,the influence is smaller.With the increase of backlash,the gear impact state transits from bilateral impact to unilateral impact.when it surpass the threshold,the impact of unilateral state will be maintained and unchanged.…”
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Suitability of Utilization of Compositional Nutrient Diagnosis on Diagnosis of Foliar Nutrient in Litchi and Longan by Yongcong ZHU, Donglin LUO, Cuihua BAI, Lixian YAO

“…Moreover, the calculated high-yield threshold considerably varied with growth stage and year, indicating poor stability. …”
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Consistency control of grid-connected substation voltage regulation based on photovoltaic inverter power coordination by Jun Liu, Fan Yang, Bingbing Lu, Lijia Ren

“…The experimental results show that this method can effectively reduce the voltage fluctuations caused by the distributed photovoltaic access, control the maximum instantaneous overvoltage of transformers within the set threshold range, improve the accuracy of voltage regulation consistency control in the grid-connected substations, and ensure the stable operation of the power grid.…”
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Post-integration based point-line feature visual SLAM in low-texture environments by Yanli Liu, Zhengyuan Feng, Heng Zhang, Wang Dong

“…Abstract To address the issues of weak robustness and low accuracy of traditional SLAM data processing algorithms in weak texture environments such as low light and low contrast, this paper first studies and improves the data feature extraction method, optimizing the AGAST-based feature extraction algorithm to adaptively adjust the extraction threshold according to the gradient size of different data features. …”
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Chinese Word Identification and Sentence Intelligibility in Primary School Classrooms by Jianxin PENG, Peng JIANG

“…A method based on the sentence test is more useful for speech intelligibility evaluation in classrooms than that based on the word test for different age groups. …”
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试验场载荷特征分析与标准化方法研究 by 施闯闯, 赵礼辉, 顾振飞, 叶沛, 翁硕, 郑松林

“…In view of the problem that the collection of vehicle load must be completed after the prototype car is completed,and the necessary load data are often lacking in the product development stage,the standardization of load spectrum under the endurance criterion of the proving ground is studied in this paper.Firstly,the characteristics of the measured load spectrum of different vehicle types in a domestic proving ground are analyzed,and the consistency of the frequency distribution of rainflow cycles for different vehicle types is clarified.Furthermore,the validity of the traditional probability distribution model and the extreme value distribution model in the rainflow cycle modeling is compared by synthesizing the difference of load frequency distribution and damage interval distribution.Through load frequency and damage distribution,the rationality of the exceeding threshold distribution model in load modeling is verified.Finally,the standardized load model of the proving ground is established by normalizing the loads of different types of vehicles.The validity and rationality of the standardized load model are verified by comparing the rainflow cycle,pseudo-damage and fatigue life of the standardized load spectrum with the measured load spectrum in proving grounds.The standardized load spectrum and load spectrum standardization method can provide accurate and effective load data for new vehicle in the early development stage,so as to ensure product reliability and durability level.…”
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Optimization of the Driving Mode Transformation of Hybrid Electric Bus based on Genetic Algorithm by Zhao Lijun, Li Shoucheng, Wei Guangpu, Zhang Hongsheng

“…The hybrid electrical city bus has two power sources to drive vehicle,so the control of vehicle driving mode transformation is become the core of the vehicle control strategy.It not only influences the vehicle fuel economy and emissions,but also influences the driving comfort of the vehicle.An HEV simulation model is built for performance analysis by interlinking of advanced software AVL CRUISE and Matlab/Simulink.By adjusting threshold of the driving mode transformation,the mode can be transformed smoothly.For achieving minimum equivalent fuel consumption,the genetic algorithm（GA）optimization method is applied to get the optima of control parameters which affect the vehicle driving mode transformation in different city bus cycles including Europe and China.The vehicle fuel economy is further improved.…”
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Advancing Sika deer detection and distance estimation through comprehensive camera calibration and distortion analysis by Sandhya Sharma, Stefan Baar, Bishnu P. Gautam, Shinya Watanabe, Satoshi Kondo, Kazuhiko Sato

“…Using the cv2.TM_CCOEFF_NORMED template matching algorithm with templates scaled from 0.01 to 2.0 and a confidence threshold of 0.6, the resolution threshold was defined as the distance at which the observed circle size deviated from the expected size. …”
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Treatment of sudden sensorineural hearing loss with hyperbaric oxygenation - our experience by Živaljević Zvonko, Živić Ljubica, Mihailović Nataša, Živković Miodrag, Vorkapić Branko, Baletić Nenad

“…It is of unclear etiology and pathogenesis, which leads to the use of different therapeutic methods. Treatment protocols are not compliant, making it difficult to objectively quantify their impact. …”
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Validation of the unique OUES scale (ΔV02, VE slope) in functional reserve assessment of cardiorespiratory system for Iranian children by Akbar Sazvar, Farzad Nazem

“…The increasing application of Graded exercise test (GXT) to determine the clinical symptoms or achieve a safe level of physical and metabolic responses in a wide range of healthy or patients individuals is common .On the other hand, the findings a reliable physiologic indicator that can evaluate the practical storage level of cardiorespiratory without the need to perform tests above the lactate threshold is important. 72 healthy young males with a mean age 13.95 ± 1.84(years) and body mass index of 19.91 ± 3.4(kg /m2) participated in an aerobic exhaustive test and VO2max value using gas analyzer method        (VE, VO2, VCO2 values) were measured with a breath by breath style. …”
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Features of Charges Transfer in the Polyethylene Glycol / Carbon Nanotubes System by E.A. Lysenkov, V.V. Klepko

“…The research of the electrical properties of the systems based on polyethylene glycol and carbon nano-tubes near-by the percolation threshold is done using the method of impedance spectroscopy. …”
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Making IoT Networks Highly Fault-Tolerant Through Power Fault Prediction, Isolation and Composite Networking in the Device Layer by Kodanda Rama Sastry Jammalamadaka, Bhupati Chokara, Sasi Bhanu Jammalamadaka, Balakrishna Kamesh Duvvuri

“…High availability of the IoT network is challenging as the networks are prone to failures due to various faults occurring within the different layers of the IoT networks. Most of the failures in the device layer are due to furious signals created by the devices when the power left in the devices approaches the threshold level. …”
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Hybrid algorithm for fault detection in three-phase motors using Principal Component Analysis by Cesar Orellana, Leony Ortiz, Alexander Aguila, Marcelo Garcia, Milton Ruiz

“…This provides an ellipsoid threshold that separates different classes, such as regular operation or fault conditions. …”
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Verification of normalized online signatures without calculating dynamic features by V. V. Starovoitov

“…A model of an individual image of human signatures is built without calculating dynamic features. The method of dynamic time transformation (DTW) is used to compare similar data of different signatures. …”
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RESEARCH OF DIGITAL CAMERA DYNAMIC RANGE ON THE IMAGING PROCESSING BASIS by M Sutkowski, Ya. N. Saukova

“…Color target sets with certified brightness and chromaticity were created at the terminals and recorded with a digital camera with different exposure times. The authors propose a method to extend the dynamic range of a digital camera for red, green and blue color channel of intensities by pairing the calibration dependencies, and determine the true brightness and color of a point on the object by calculation.Calibration dependencies (triads) of digital camera for red, green and blue color channels intensities were constructed. …”
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An Adaptive SVD-Based Approach to Clutter Suppression for Slow-Moving Targets by Yuhao Hou, Baixiao Chen

“…To address this limitation, this paper proposes an adaptive singular value decomposition (A-SVD) method utilizing support vector machines (SVM). The proposed approach leverages the augmented implicitly restarted Lanczos bidiagonalization (AIRLB) algorithm to decompose echo matrices into different subspaces, which are then characterized in relation to Doppler frequency, energy, and correlation. …”
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Angle Estimation for Range-Spread Targets Based on Scatterer Energy Focusing by Zekai Huang, Peiwu Jiang, Maozhong Fu, Zhenmiao Deng

“…Finally, the angle of the energy-focused signal is estimated using the sum-and-difference amplitude comparison method. The proposed method can effectively focus the scatterers’ energy. …”
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Vibration and flutter analysis of piezoelectric plates in an electrothermal field using higher order theories by Mohammad Javad Khoshgoftar

“…By applying voltage and heat, it is possible to increase the flutter threshold and delay it.…”
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