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As the future highest dam in the world，Shuang Jiang Kou rockfill dam was the water retaining structure of homonymous hydropower station，a controlling engineering on Da Du River hydropower development，which is under design ...
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As the future highest dam in the world，Shuang Jiang Kou rockfill dam was the water retaining structure of homonymous hydropower station，a controlling engineering on Da Du River hydropower development，which is under design now.This dam is a central earth core dam with a height of 312 meters.A type of gravel soil stiffer than clay，which is made by artificial compounding of clay and gravel，is introduced to reduce the difference in displacement of earth core and rock filled shell zone.A three dimensional coupled nonlinear finite element analysis is carried out to study the three dimensional stressstrain behavior of Shuang Jiang Kou rockfill dam. Computation results show that the introduction of the contact high-plasticity clay layer is effective and necessary.
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摘要 :
As the future highest dam in the world，Shuang Jiang Kou rockfill dam was the water retaining structure of homonymous hydropower station，a controlling engineering on Da Du River hydropower development，which is under design now.T...
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As the future highest dam in the world，Shuang Jiang Kou rockfill dam was the water retaining structure of homonymous hydropower station，a controlling engineering on Da Du River hydropower development，which is under design now.This dam is a central earth core dam with a height of 312 meters.A type of gravel soil stiffer than clay，which is made by artificial compounding of clay and gravel，is introduced to reduce the difference in displacement of earth core and rock filled shell zone.A three dimensional coupled nonlinear finite element analysis is carried out to study the three dimensional stressstrain behavior of Shuang Jiang Kou rockfill dam. Computation results show that the introduction of the contact high-plasticity clay layer is effective and necessary.
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Automatically extracting features from large scale raw data for fault diagnosis is important in the current era of big data. In this paper, a deep neural network based on the kernel function and denoising auto-encoder is proposed....
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Automatically extracting features from large scale raw data for fault diagnosis is important in the current era of big data. In this paper, a deep neural network based on the kernel function and denoising auto-encoder is proposed. The kernel denoising auto-encoder (KDAE) neural network consists of one KDAE layer and multiple auto-encoder (AE) layers to automatically extract the fault features from raw data. Then, the softmax classifier is added as classifier layer. The improved chaos firefly algorithm is used to optimize the undetermined parameters of the kernel function and the network to obtain the diagnosis model. The proposed method is then verified by the typical failure test data of the aero-engine intermediate bearing, which has achieved higher classification accuracy than the traditional denoising auto-encoder network.
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摘要 :
Automatically extracting features from large scale raw data for fault diagnosis is important in the current era of big data. In this paper, a deep neural network based on the kernel function and denoising auto-encoder is proposed....
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Automatically extracting features from large scale raw data for fault diagnosis is important in the current era of big data. In this paper, a deep neural network based on the kernel function and denoising auto-encoder is proposed. The kernel denoising auto-encoder (KDAE) neural network consists of one KDAE layer and multiple auto-encoder (AE) layers to automatically extract the fault features from raw data. Then, the softmax classifier is added as classifier layer. The improved chaos firefly algorithm is used to optimize the undetermined parameters of the kernel function and the network to obtain the diagnosis model. The proposed method is then verified by the typical failure test data of the aero-engine intermediate bearing, which has achieved higher classification accuracy than the traditional denoising auto-encoder network.
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OFDM technology has been widely adopted as the mainstream physical technology in B3G and 4G systems for better utilization ratio of spectrum, as a result, the RF parts of B3G and 4G systems have to face greater challenges. At the ...
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OFDM technology has been widely adopted as the mainstream physical technology in B3G and 4G systems for better utilization ratio of spectrum, as a result, the RF parts of B3G and 4G systems have to face greater challenges. At the same time, we need find an effective and efficient method to evaluate the RF performance of B3G and 4G systems. The error vector magnitude (EVM) is suitable to serve as a key parameter to evaluate the RF performance of OFDM transmitters according to the experience of RF conformance test of 2G system. In this paper the research model of EVM measurement for B3G and 4G systems is set up. Then an accurate, robust EVM measurement algorithm is proposed, which is quite easy to be applied into practice. According to the comparison between the simulation results and the measurement results with professional test instrument, the algorithm can accomplish EVM measurement; moreover, it is competent to be a key measurement algorithm in RF test instruments for OFDM transmitters.
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In laboratory tests, ozone was used to fumigate several kinds of primary grain insects to determine its efficacy. The results showed there was good efficacy in controlling phosphine-susceptible strains of Silophilus zeamais, Rhyzo...
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In laboratory tests, ozone was used to fumigate several kinds of primary grain insects to determine its efficacy. The results showed there was good efficacy in controlling phosphine-susceptible strains of Silophilus zeamais, Rhyzopertha dominica, andTribolium castaneum, and phosphine-resistant strains of Sitophilus oryzae, Rhyzopertha dominica, and Tribolium castaneum. Ozone killed all adults of tested insects in 2 days at 120 ppm, in 4-6 days at 100 ppm, in 6-7 days at 70 ppm and in 12 days at 15-20 ppm. The results of tests carried out in small grain bulks in the field were similar to those from laboratory tests. Ozone appears to have some potential for use in controlling insects in stored products.
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According to the demand of data acquisition in power system, the intelligent wattmeter is constructed, which is based on DSP and FPGA as the data acquisition and processing system, meanwhile, the administration center of the intel...
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According to the demand of data acquisition in power system, the intelligent wattmeter is constructed, which is based on DSP and FPGA as the data acquisition and processing system, meanwhile, the administration center of the intelligent wattmeter is based on single-chip computer 8051. With these, high speed, multi-point sampling, a large quantity accumulation and real-time calculation are realized. At the same time it reduces the effect of the measuring accuracy upon higher harmonic and the measuring accuracy could reach to 0.02 grade.
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摘要 :
According to the demand of data acquisition in power system, the intelligent wattmeter is constructed, which is based on DSP and FPGA as the data acquisition and processing system, meanwhile, the administration center of the intel...
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According to the demand of data acquisition in power system, the intelligent wattmeter is constructed, which is based on DSP and FPGA as the data acquisition and processing system, meanwhile, the administration center of the intelligent wattmeter is based on single-chip computer 8051. With these, high speed, multi-point sampling, a large quantity accumulation and real-time calculation are realized. At the same time it reduces the effect of the measuring accuracy upon higher harmonic and the measuring accuracy could reach to 0.02 grade.
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MIMO-relay technology is accepted as a promising solution to improve cell edge performance for the future 4G wireless system. In this paper, an inter-cell interference mitigation scheme based on MIMO-relay technique is proposed to...
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MIMO-relay technology is accepted as a promising solution to improve cell edge performance for the future 4G wireless system. In this paper, an inter-cell interference mitigation scheme based on MIMO-relay technique is proposed to improve the average capacity for cell edge users. In the paper, a new network structure with shared relay station (SRS) is first studied, and a two-tier channel decomposition method is proposed based on the structure; then the BS (base station) precoding and relay filtering scheme is designed based on the proposed method, and the power allocation scheme at SRS is further discussed with two solutions of average power allocation algorithm and genetic based optimization algorithm. Numerical results show that compare with other inter-cell interference mitigation schemes, the proposed scheme can effectively cancel the inter-cell interference and significantly improve the capacity performance for cell edge users.
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摘要 :
MIMO-relay technology is accepted as a promising solution to improve cell edge performance for the future 4G wireless system. In this paper, an inter-cell interference mitigation scheme based on MIMO-relay technique is proposed to...
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MIMO-relay technology is accepted as a promising solution to improve cell edge performance for the future 4G wireless system. In this paper, an inter-cell interference mitigation scheme based on MIMO-relay technique is proposed to improve the average capacity for cell edge users. In the paper, a new network structure with shared relay station (SRS) is first studied, and a two-tier channel decomposition method is proposed based on the structure; then the BS (base station) precoding and relay filtering scheme is designed based on the proposed method, and the power allocation scheme at SRS is further discussed with two solutions of average power allocation algorithm and genetic based optimization algorithm. Numerical results show that compare with other inter-cell interference mitigation schemes, the proposed scheme can effectively cancel the inter-cell interference and significantly improve the capacity performance for cell edge users.
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