In order to improve the prediction fitting degree of the existing method to predict the drift path of the ship, the particle reloading simulation method was proposed to predict the drift path from the aspect of segmen...
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In order to improve the prediction fitting degree of the existing method to predict the drift path of the ship, the particle reloading simulation method was proposed to predict the drift path from the aspect of segment prediction. Particle reloading simulation method divides the drift time into multiple segments, and then the information is updated after each segment. The updating will continue the whole drift process, and then the drift path will be obtained. Experimental results indicate that our method is extremely promising for predicting drift paths of ships. This is due to the avoidance of the problem of the Monte Carlo method, which prediction accuracy of the long-distance decreases with time.
To forecast total water demand in advance is practically important for water supply planning. The paper first made impacting factors analysis of the total water demand in China. Then established three models for the t...
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To forecast total water demand in advance is practically important for water supply planning. The paper first made impacting factors analysis of the total water demand in China. Then established three models for the total water demand forecasting by multiple regression analysis. The fitting precision of the forecasting models is satisfactory. Applied the models and expert experiences, made the total water demand forecast in China 2018 in some scenarios. The results show that the total water demand will be 608.04 billion m in 2018 in China.
In order to improve ion implantation and deposition signal generator to make it more stable and convenient, take advantage of the great anti-jamming characteristic of PLC and the convenient usage of touch screen, use ...
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In order to improve ion implantation and deposition signal generator to make it more stable and convenient, take advantage of the great anti-jamming characteristic of PLC and the convenient usage of touch screen, use the pulse output and high-speed counter ability of PLC and communication ability of the touch screen, to realize the pulse output and parameter control. This device can generator two high-speed pulse(main arc pulse and the bias pulse) at the same time, enabling 4 parameters measured in microsecond, which are named the main arc pulse width, the bias arc pulse width, frequency and the delay time respectively. The final designed PLC and touch screen can work normally and have been applied to the original generator now as the source of pulse signal.
As an important means of water transportation, ships bear domestic and international trade and transportation, and consume a large amount of fuel every year. It is imperative to improve ship energy efficiency and redu...
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As an important means of water transportation, ships bear domestic and international trade and transportation, and consume a large amount of fuel every year. It is imperative to improve ship energy efficiency and reduce energy consumption. Describes the international situation of ship energy save and emission reduction, to divide the development course of international standards. The constraint index form, listing the coping styles adopted by Chinese government, that the shipbuilding industry in the formulation of standards and norms constraint index. This paper discusses the factors affecting the energy save and emission reduction, including marine technology, transport capacity and energy consumption, ship operations management, manage system, and explore the path to improve transport ship during operation.
computer numerical simulation is used to study the propagation law of seismic waves in underground media, which is one of the most practical and convenient research methods in the field of seismic exploration in moder...
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ISBN:
(纸本)9781665423168
computer numerical simulation is used to study the propagation law of seismic waves in underground media, which is one of the most practical and convenient research methods in the field of seismic exploration in modern geophysics. Due to the many anisotropy parameters of elastic wave, the calculation in the simulation process is large and time-consuming. This paper propose the idea of using acoustic waves for simulation. Acoustic anisotropy theory sets the velocity of the shear wave part of the elastic wave to zero and eliminates many of its parameters. This paper propose the idea of staggered mesh finite difference to discretize the acoustic wave equation. The purpose is to convert the differential equation into a difference equation. The homogeneous medium model and layered medium model are used in the forward modeling process. This paper use the perfectly matched layer(PML) boundary absorption algorithm to process the wave propagating to the model boundary. The experimental results show that our algorithm is correct and of great significance to the study of seismic wave propagation in earth media.
This paper proposes a monitoring method of power dispatching automation master station based on clustering algorithm. Based on the application of history data, this method constructs multi-dimensional space vector, an...
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This paper proposes a monitoring method of power dispatching automation master station based on clustering algorithm. Based on the application of history data, this method constructs multi-dimensional space vector, and generates operation state knowledge base by clustering algorithm. Real time data can be monitored and classified by using the generated knowledge base. The validity of the method is verified by a period of basic data. The results show that the method has better ability and accuracy to monitor power dispatching automation master station system, and it can provide reference for the selection of monitoring method of power dispatching automation master station.
Intersection is an important component of the urban transport network, in where traffic congestion usually takes place. One of the key to solve urban transport problems is to organize the traffic in the intersection r...
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ISBN:
(纸本)9781450363396
Intersection is an important component of the urban transport network, in where traffic congestion usually takes place. One of the key to solve urban transport problems is to organize the traffic in the intersection reasonably and effectively. This paper does research on a specific single intersection, using the video traffic data collection technology, considering signal cycle and phase time which are decided by a real-time traffic flow. The paper developed a self-adaptive timing model on the single target constraint to reduce intersection delay. The model is carried out through fuzzy-genetic algorithm. Matlab simulation analysis and a series of comparison show that the methods of optimization models and genetic algorithm are effective and feasible.
The proceedings contain 13 papers. The topics discussed include: a metric for evaluating supercomputer performance in the era of extreme heterogeneity;evaluating SLURM simulator with real-machine SLURM and vice versa;...
ISBN:
(纸本)9781728101828
The proceedings contain 13 papers. The topics discussed include: a metric for evaluating supercomputer performance in the era of extreme heterogeneity;evaluating SLURM simulator with real-machine SLURM and vice versa;automated instruction stream throughput prediction for Intel and AMD microarchitectures;deep learning at scale on NVIDIA V100 accelerators;algorithm selection of MPI collectives using machine learning techniques;miniVite: a graph analytics benchmarking tool for massively parallel systems;and improving MPI reduction performance for manycore architectures with OpenMP and data compression.
Objective: To explore a method to identify classical recipes of traditional Chinese medicine(TCM) from clinical prescriptions of traditional Chinese medicine(TCM). Methods: By using the template matching algorithm in ...
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Objective: To explore a method to identify classical recipes of traditional Chinese medicine(TCM) from clinical prescriptions of traditional Chinese medicine(TCM). Methods: By using the template matching algorithm in the field of image processing, this paper designs a kind of computeralgorithm for clinical prescription recognition of Chinese medicine by constructing the relevant database and mathematical model of TCM prescription and classical prescription of traditional Chinese medicine, and implements the algorithm with Delphi language. Results: By identifying the clinical prescriptions in TCM cases, the prescriptions contained in the prescriptions can be identified, although they are not the same as the doctors' intentions. Conclusion: The clinical prescription recognition method based on template matching algorithm is feasible, which provides a reference for the further study of TCM informationization.
Ad-hoc network is a repeatedly jumping, nothing central, and self-organizing network. the entire network has not stable infrastructure, consisting of mobile nodes. According to the problem that cluster Ad-hoc network ...
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Ad-hoc network is a repeatedly jumping, nothing central, and self-organizing network. the entire network has not stable infrastructure, consisting of mobile nodes. According to the problem that cluster Ad-hoc network cluster head selection mechanism is not reasonable and the cluster heads, and cluster members in sending data process transmit the data that is too large or too small to node failure. So, we proposed clustering algorithm of Ad-hoc network based on node data value, The algorithm chooses cluster heads in different clusters according to the data value, node energy value, optimal node degree and node average distance, the cluster head collects the date of cluster members and integration it to go to the next step Communication and other work. In contrast to simulation and comparison experiment of the other three traditional algorithms, the results indicated that applying the algorithm of Ad-hoc network in cluster number are optimized, the property in repeatedly into the cluster and rule setup date has improved, and in a certain extent it prolongs the network life cycle, in the meantime it improves the stability of the cluster structure.
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