Development of a Parallel and Indirectly Self-adaptive Robot Hand with Single-chain Transmission of Double-rack Mechanism by Jingwei Su, Wenzeng Zhang

“…The composition and movement process of the PISA finger are introduced in detail. Theoretical analysis of the range and grasping force are given. …”
Get full text

EclipseNB: A Network of Low‐Cost GNSS Receivers to Study the Ionosphere by A. Kashcheyev, B. Nava, C. Watson, P. T. Jayachandran, R. B. Langley

Get full text

Development of Robot Hands for Linear Parallel Pinching and Self-adaptive Grasping with Springs and Hoeckens Linkage by Yankai Liu, Wenzeng Zhang

“…The SHKL finger uses Hoeckens linkage to realize the linear movement of the end joint，uses double parallel four-bar linkage with the same direction and speed to realize the attitude fixation of the end phalange relative to the palm，and uses elastic joints，springs and limits to realize the self-adaptive grasping. The theoretical analysis and experimental results show that the SHKL hand has the functions of linear parallel pinching and self-adaptive grasping. …”
Get full text

Input-to-State Stabilization of a Class of Uncertain Nonlinear Systems via Observer-Based Event-Triggered Impulsive Control by Xiangru Xing, Jin-E Zhang

“…Eventually, the availability and feasibility of the achieved theoretical works are elucidated by two simulation examples.…”
Get full text

On the performance optimization for the cloud architecture with sleep-mode and registration service by Shunfu JIN, Haixing WU, Tiantian HUO, Wenjuan ZHAO

“…In order to balance the energy conservation and the service quality for anonymous users,a novel sleep-mode based architecture with the free cloud service and the registration cloud service was proposed.Regarding the free cloud service as the first service,the registration cloud service as the second service and the sleep sate as the vacation,a partial asynchronous multiple vacation queueing model with a second optional service was built.Applying the method of a matrix-geometric solution,the steady-state distribution of the queueing model was derived,and then the energy saving rate of system as well as the average response time of anonymous users were estimated.By considering the benefits from accessing the cloud service and the time cost on waiting for the cloud service,benefit functions were constructed.Numerical results were carried out to reveal the relationship between Nash equilibrium arrival rate and social optimal arrival rate of anonymous users.The proposed cloud architecture provides a theoretical basis for social optimization.…”
Get full text

ANALYSIS ON DYNAMIC CHARACTERISTICS OF TOOTH ROOT CRACK OF GEAR DRIVE SYSTEM UNDER VARIABLE LOAD EXCITATION by SHI PeiMing, ZHAO Na, LIANG Kai, HAN DongYing

“…The characteristics of the crack signal are studied by using the time-frequency analysis method,which provides a theoretical support for the gear crack fault diagnosis. …”
Get full text

An Equivalence between the Limit Smoothness and the Rate of Convergence for a General Contraction Operator Family by Maxim J. Goldberg, Seonja Kim

Get full text

Stochastic simulation of soil moisture dynamics in farmland in the eastern region of the Songnen Plain. by Bo Meng, Jin Wang, Fanxiang Meng, Ennan Zheng, Tianxiao Li, Bowen Tang

“…It shows that the stochastic model can effectively simulate the probability density function of soil moisture in the study area, which can provide a theoretical basis and scientific method for efficiently using soil and water resources in the area.…”
Get full text

Multilingualism and Plurilingualism in Teaching the Lingua Franca: A Critical Review by Marzieh Ebrahimi

“…However, it also presents other issues that necessitate careful examination, including theoretical uncertainties, practical challenges, and constraints associated with critical pedagogy. …”
Get full text

Intelligent Industrial Design System Based on Spatial Digital Technology by Yingbin Jian, Yunpeng Li, Lijie Wang, Shenghuan Dong

“…Moreover, considering that the various conditions of the workpiece detection surface will make the calculation of the refraction of the identification light more complicated; this paper analyzes the specific parameters of the identification light, which lays a theoretical foundation for the accurate calculation of the subsequent wavefront arc. …”
Get full text

Analysis and Enhancements of a Prolific Macroscopic Model of Epilepsy by Christopher Fietkiewicz, Kenneth A. Loparo

“…In the present study, a prolific series of models is evaluated with regard to theoretical and computational concerns, and enhancements are developed. …”
Get full text

Variation Pattern of the Stress-Strain Curve of Concrete under Multifactor Coupling by Haijian Xie, Henglin Lv

“…This model can not only predict the change of the stress-strain curve of high-strength concrete in a coal mine air shaft environment but also provide theoretical reference for the application of high-strength concrete in an air shaft environment.…”
Get full text

Forest Ecosystem Carbon Measurement Methods and Future Directions by YUAN Yuna, JIANG Xuebing

“…The forest ecosystem is a crucial component of terrestrial ecosystems,possessing the largest carbon reservoir on the Earth's surface.The fluctuations in its carbon stocks have a profound impact on the global carbon cycle.In the current context of a growing greenhouse effect and the rising occurrence of extreme climates,accurately estimating carbon stocks in the forest ecosystem and strengthening the construction monitoring system for its carbon stocks holds great significance for gaining an in-depth understanding of the global carbon cycle and predicting global climate change.Oriented toward strengthening the carbon sink function of forest ecosystems and achieving the dual carbon target, this paper systematically explained the mechanism of carbon sequestration in forest ecosystems.It analyzed and compared several mainstream methods of forest carbon estimation, proposing feasible strategies for building a forest carbon stock monitoring system in China.The aim is to provide a theoretical reference for the stable improvement of China's forest ecosystem carbon stock monitoring capacity and to provide scientific support for achieving the carbon peak and carbon neutrality in a timely manner.…”
Get full text

Superposition Method for Structural Topology Optimization of Rigid Manipulator by Xiaorui Liu, Peixiang He, Guanghui Xie

“…The performance of the integrated topology obtained is evaluated by theoretical simulation，and verified by taking the rigid link of 3-DOF industrial manipulator as an example. …”
Get full text

A social network perspective on the interaction between policy bubbles by Moshe Maor

“…To bridge these gaps, this article develops a theoretical framework and methodological toolbox for explaining the potential impact of interbubble dynamics on the sustainment of policy bubbles. …”
Get full text

Outage performance analysis for multi-UAV relay systems with threshold-based DF protocol by Zhenlei DAN, Xuewen WU, Jian OUYANG, Xiaoxiao WANG, Chenwei GU

“…The unmanned aerial vehicle (UAV) relay system has become a hot topic as an effective method for the remote transmission in wireless communications.By taking path loss into account,a relay cooperative transmission system model based on multiple UAVs was established firstly,and the maximum output signal-to-noise ratio (SNR) of the system with threshold-based decode-and-forward (DF) protocol was obtained.Then,by assuming that both the uplink and downlink experience Rician distribution,the closed-form expression for outage probability (OP) of the considered system with multiple UAVs was derived.Furthermore,the asymptotic OP formula at high SNR was also derived to show the diversity order and array gain of the considered system,which were convenient to reveal the effects of system parameters on the outage performance.Finally,the computer simulations verify the correctness of the theoretical analysis,and reveal the effect of the relay number,antenna number and the threshold on the system outage performance,thus the proposed scheme can provide guidance for the system design and application.…”
Get full text

Interference Avoidance and Mitigation Techniques for Hybrid Satellite-Terrestrial Mobile Backhaul System by Xiaoyan ZHANG, He WANG

“…One of the best ways is to assume that satellite and terrestrial segments share the same spectrum in order to utilize more eff ciently the scarce and expensive spectrum resource.The interference avoidance and mitigation technologies such as antenna arrays, multi-antenna communication technologies, intelligent backhaul nodes, interference-aware power allocation method, and licensed shared access (LSA) were deployed in a hybrid satellite-terrestrial mobile backhaul (MBH) system to demonstrated how to enhance the overall capacity of the hybrid system and reuse the spectrum at diff erent systems on a noninterfering basis.Through theoretical analysis and numerical simulations, it is observed that these interference avoidance and mitigation techniques mentioned above could be used eff ciently to meet the enormous capacity demands of future backhaul networks, off -load the terrestrial segment, manage intrasystem (terrestrial) and the intersystem (satellite-terrestrial) co-channel interference (CCI), lead to hardware costs and energy-consumption savings, and improve spectrum utilization eff ciency.…”
Get full text

Machine Learning-Based Multitarget Tracking of Motion in Sports Video by Xueliang Zhang, Fu-Qiang Yang

“…In terms of moving target detection, the traditional detection algorithms are analysed theoretically as well as implemented algorithmically, based on which a fusion algorithm of four interframe difference method and background averaging method is proposed for the shortcomings of interframe difference method and background difference method. …”
Get full text

How to resist fear. ETA terrorism and Basque Socialism, 1995-2011 by Sara Hidalgo García de Orellán

“…To do so, we will use the theoretical-methodological tools provided by the history of emotions. …”
Get full text

The Dynamics of Structural and Energy Intensity Change by Lizhan Cao

“…Moreover, the change of economy-wide energy intensity is shaped by both structural and sectoral energy intensity changes. According to theoretical findings and simulation exercises, structural change, initiated by technological growth rate and substitution elasticity, affects the growth rate of economy-wide energy intensity. (1) If the energy threshold technological growth rates are high or low enough, the overall energy intensity will develop monotonically. (2) If the energy threshold technological growth rate is moderate, and (i) substitution elasticity and initial final production technological growth rate meet some requirements, the economy-wide energy intensity will grow monotonically; otherwise, (ii) with the suitable combination of substitution elasticity and initial final production technological growth rate, the overall energy intensity can develop nonmonotonically, like U or inverted-U curves.…”
Get full text