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Among power generation, transmission and use, distribution is an extremely important link. The distribution system includes a transformer and a variety of high and low voltage electrical equipment, the circuit breaker is a large amount of electrical appliances. The circuit breaker can be used to distribute electric energy, the asynchronous motor is not frequently started and the power line and motor...
In order to solve the problems of power transformer such as the fault can be reflected by different characteristic signal from different side and complexity of fault reason and phenomenon, a synthetic diagnosis method using multi-neural network and evidence theory for transformer fault diagnosis is presented. Various kinds of data are dealt by using neural network's excellent abilities of learning,...
The rise of the network economy and E-commerce has pushed the rapid development of logistics market. The Multi-tier Shuttle Warehousing System (MSWS) as a new autonomous unit load storage/retrieval system, which flexibility and work efficiency is much-improved compared with the conventional AS/RS, has attracted more and more attention of logistics enterprises both at home and abroad. MSWS is composed...
The purpose of this study was to explore the relationship between grip strength and inter-muscular coordination of the forearms and hands. Twenty-four healthy young volunteers participated in the experiment. The subjects were instructed to grip hydraulic hand dynamometer with five force levels-maximal voluntary contraction (MVC), 70% MVC, 50% MVC, 30% MVC and without any contraction. Muscle activity...
The study aims to research the effecting factors of the level of independent innovation ability in China, constructing innovation environment by the grey clustering model and build the national innovation capability evaluation index system, including the innovation input, innovation output and innovation potential of 4 indexes and 17 level two indexes. The related data of 26 countries was collected...
4 first-grade indicators and 13 second-grade indicators, which are selected by a two-stage grey cluster method from numerous factors such as those influencing the development of economy and society, infrastructure construction, and related industry development, constitute an assessment indicator system for evaluating regional economic and social development. Data was collected from 14 cities and prefectures...
Vital signs (including breath and heartbeat) monitoring is a key tool in healthcare. Current monitors need invasive electronic sensors attached to user's body, which is inconvenient and uncomfortable. We demonstrate photonic smart health monitoring system based on phase-sensitive optical fiber interferometers. Users simply lie/sleep on a sensor mat embedded with optical fiber interferometers. Breath...
A simple fiber-optic in-line Mach-Zehnder modal interferometer is fabricated and studied for monitoring human being's breathing rate, which is one of the most important vital signs. The sensing structure is simply fabricated by a couple of up-tapers manufactured in the common telecommunication single mode fiber (SMF) by a commercial splicer. Sensing performances with different distances between the...
The innovation graph method and current reckoning method are combined to realize complementary advantages and comprehensive identification in this paper. For different identification objects, using different identification method, the bad measurement is mainly caused by current reckoning method, and the topology change identification is mainly done by the innovation graph method. This way uses the...
Modern power grid has already become one of the pillar industry of the national economy. The safety and steady operation of power grid is closely related to the development of all walks of life, national economy guarantee the fundamental interests of people. So it is significant to guarantee the safety of grid in production, operation, and the electric power supply. In this paper, connecting with...
Hub motor driven pure electric vehicle's transmission structure is simple and the driving wheel torque is controlled independently of each other. When the vehicle turns, both sides of the hub motor around the main pin to produce differential torque, so it can be flexible control of vehicle steering. In this paper, the hub motor driven pure electric vehicle as a prototype, side-slip angle and angular...
Urban saturation load is the key index to determine the final scale of power grid development in urban power network planning. The research on urban power load forecasting has important guiding significance and practical value for the construction and planning of urban power network in the future. In this paper, a new method based on the saturated load density was proposed for the prediction of urban...
High uncertainties in day-ahead unit commitment (UC) introduced by the deviation of wind power forecast error require high amount of spinning reserve, which counteracts the cost and fossil energy saving contributed by wind power integration. To mitigate the above problem, a two-level unit commitment coordinated strategy (TLUCCS) is presented based on the characteristic of wind power forecast accuracy...
Power grid scale is expanding, more generators with large capacity are used in the power system, the growth of the load current is rapidly, the realization of the major regional power grid interconnection, all of these factors will lead to the fault current level continues to rise, which may lead to serious security problems, even collapse and collapse of the system. This paper proposes a high-speed...
The current reckoning method is modeled by alternating current branch model, at the same time, the current reckoning network model is established[1]. Based on the current measurements, the link reckoning technology is used to obtain the reckoning current, and then achieve the identification, current difference, to mine its identification characteristics in the presence of undesirable measurements...
The paper studies the rapid identification technology of short circuit fault and the predictive technology of the time at which the fault current is zero, introduces the current signal can be used for processing cycle of the half-wave Fourier algorithm, improves the algorithm according to the features of short circuit current and the inherent defects of half-wave Fourier algorithm and verifies the...
Forward logistics and reverse logistics collaborative distribution is a powerful way to reduce carbon emission because the vehicle loading efficiency can be improved. Firstly, this paper study the theoretically and proposes a forward and reverse logistics collaborative delivery model. Secondly, Design optimize the target is based on distribution distance, actual load and fuel consumption which are...
In this paper, the generation of passive intermodulation at standard TNC coaxial connectors is investigated. A series of tests has been performed in order to analysis the intermodulation level under different temperature circumstances. The relationship between the intermodulation response of the connectors and the change of temperature and straining on the junctions has been studied. It has been found...
In this paper, we propose a cooperative spatial modulation (SM) system combined with incremental hybrid decode-amplify-forward (IHDAF) scheme, which can select direct transmission or the corresponding relaying protocol according to the instantaneous channel signal-to-noise ratio (SNR). The signal processing scheme has also been provided. Simulation results of the system outage probability show that...
The modularization strategy can dramatically shorten the lead time and reduce the cost of complex products development, and module partition is the basis of the modularization. In this paper, a complex network module is built to represent the complex product structure, and using interval-valued intuitionistic fuzzy sets to calculate the weights of the edges of the network model are brought to illustrate...
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