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This paper analyzes the stator windings turn-to-turn fault tolerant capability on inverter-fed permanent magnet (PM) machines. By adding a secondary neutral point (NP) in stator windings, both the fault detection and tolerant capability can be improved considering a small turn-to-turn short at early stage. From the perspective of fault detection, the proposed two NP's windings increase the equipment...
Surface soil moisture (SSM) is a significant variable in various fields of science. This paper aims to analyze and improve a SSM retrieval model to apply it to estimate SSM at the regional scale. Firstly, the model parameters were been analyzed. The rotation angle was transformed into exponential form and the ellipse center horizontal coordinate was decreased for the improved SSM retrieval model....
Reduced-order models with springy massless legs have been employed extensively in the study of legged locomotion. Due to their hybrid nonlinear dynamics, analysis of such systems is often carried out numerically. In contrast, this paper adopts an analytical approach to study conditions for stability in a sagittal-plane model of quadrupedal bounding. Exploiting time-reversal symmetries possessed by...
Research of the neural network language model in NLP is reviewed. In this paper, the neural network language models are classified into early shallow language models and deep neural network models based on deep learning. This paper emphatically introduces progress of the deep neural network language models, and summarizes the status of deep neural network research's development. Finally, the existing...
Modularity is a widely used measure for evaluating community structure in networks. The definition of modularity involves a comparison between the observed network and a null model, which serves as a reference. To make the comparison significant, this null model should characterize some features of the observed network. However, the previously used null models are not good representations of real-world...
For features of planning and design's evaluation, and on basis of the principles of establishing evaluation index system, this paper established the comprehensive evaluation index system of residential planning and design program; In the use of analytical hierarchy process to determine weights of evaluation indexes, and based on the character of fuzzy comprehensive evaluation method that using dimensionless...
This paper presents the performance comparison of interleave division multiple access (IDMA) and code division multiple access (CDMA) systems based on Simulink. We investigate the basic principle that illustrates the similarities and differences of the two different schemes. According to these schemes, we analyze every model function and build simulation platforms for these systems. The simulation...
In this paper the throughput, frame discard probability, and average frame delay performance of DCF in IEEE 802.11 are analyzed and evaluated for different parameters, such as the number of users and frame size considering the network delay and the CTS/ACK time out. Related analysis and statements will be helpful to research and development of wireless networks and products.
Cognitive radio has the potential to improve spectrum efficiency and to alleviate spectrum scarcity by opportunistically utilizing un-utilized or under- utilized spectrum. A cognitive radio device needs to monitor primary user (PU) activities to identify white spaces and utilize spectral opportunities for transmission, without significantly affecting the PU performance. Additional challenges exist...
In this letter, the outage probabilities of selection relaying protocols are analyzed and compared for cooperative wireless networks. It is assumed that both source and relay use equal allocated time in transmission. Depending on the quality of the source-relay channel, the relay may choose either Decode-and-Forward (DF), Amplify-and-Forward (AF), or Direct-Transmission (DT) to forward signals. It...
IIM CAS is now working on simulation platform for driverless vehicle to test some functions of driverless vehicle. The overall architecture of this system is presented and the key components are illustrated briefly. In virtual scene, its intelligent behavior is emphasized and the intelligent virtual traffic environment framework is given out. In the light of the difference of creditability analysis...
Unlike in IEEE 802.11, the CSMA/CA traffic conditions in IEEE 802.15.3 are typically unsaturated. This paper presents an extended analytical model based on Bianchi's model in IEEE 802.11, by taking into account the device suspending events, unsaturated traffic conditions, as well as the effects of error-prone channels. Based on this model we re-derive a closed form expression of the average service...
Latent Dirichlet Allocation (LDA) is a generative model employing the symmetry Dirichlet distribution as prior of the topic-words' distributions to implement model smoothing. When LDA is applied to text classification, smoothing is essential to classification performance. In this paper, we propose a feature-enhanced smoothing method in the idea that words not appeared in the training corpus can help...
Interleave-division multiple-access (IDMA) is one of the key multiple access techniques in the new wireless communication systems. In this paper, we investigate the basic principle of IDMA systems, analyze every model function, and build a simulation platform for IDMA systems. It is convenient to set the main parameters of the model of IDMA systems according to the simulation platform, and thus realize...
Quality function deployment (QFD) is a customer-oriented structural development approach in manufacturing whereas the Gap model told us the truth of service psychological process. Along the gaps in the circle of service satisfaction, a new model of service quality function deployment (SQFD) has been established to develop new service. A Chinese mobile telecom case study (hall service) has been employed...
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