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Chen L.-Q.,Changzhou Institute of Technology | Du L.-L.,Wuwei Occupational College | Li B.,Changzhou Institute of Technology
Open Electrical and Electronic Engineering Journal | Year: 2014

In order to study the battery performance, putting forward a kind of two order RC equivalent circuit model, measuring static and transient data by HPPC test, fitting the relationship between open circuit voltage and state of charge (SOC), analyzing system identification of the dynamic parameters with MATLAB tool. Finally, by comparing the simulation data with the test data, the model is correct and feasible. © 2014, Chen et al.

Ming Z.,Wuwei Occupational College
Advanced Materials Research | Year: 2011

Concrete is a mainly and commonly good combined construction material, and is consisted of many well-defined components, so mechanical properties of concrete are very complex. the compressive strength of the concrete is a main criterion in producing concrete, but the test on it is complicated because test components of concrete must be kept in the special condition an tested after 28 days. To simplify the procedures and obtain a reasonable data, the paper presents a method using the system of BP neural network predicting the strength of concrete. the system is trained and tested by using many data of strength of concrete in the past ,the test result shows that the value of the strength of concrete predicted is approximate to the experimental value, and the method presented is very efficient and reasonable in predicting the compressive strength of concrete. © (2011) Trans Tech Publications.

Dong P.,Key Irrigation Experimental Station in Wuwei | Wang Z.,Key Irrigation Experimental Station in Wuwei | Wen G.,Wuwei Occupational College | Fan X.,Integrated Service Center on Water Conservancy Technologies in Wuwei City
Paiguan Jixie Gongcheng Xuebao/Journal of Drainage and Irrigation Machinery Engineering | Year: 2014

The effects of irrigation frequency on soil moisture, water consumption and water use efficiency (WUE) in growth stage, maize seed yield are studied for seed maize by field experiment under 900 m3/hm2 constant irrigation quota and four irrigation frequencies: 0, 2, 3, 4, respectively. It is showed that irrigation frequency mainly affects the soil moisture in 0-100 cm layer after jointing stage, the number of rows per ear and the number of kernels per row. The highest water consumption mainly appears in tasseling and grain fill stages. Seed maize demonstrates a variably sensitive degree to water shortage during its various growth stages, i.e. the degree decreases steadily in a sequence such as fill, jointing, seedling, milk and tasseling stages. An irrigation schedule, such as 900 m3/hm2 irrigation quota for 3 times in seeding and jointing stages, jointing and tasseling stages, tasseling and filling stages, respectively, exhibits a higher economic yield and a better WUE in arid and semi-arid areas in Northwest China. ©, 2014, Paiguan Jixie Gongcheng Xuebao/Journal of Drainage and Irrigation Machinery Engineering. All right reserved.

Chai A.P.,Wuwei Occupational College
Applied Mechanics and Materials | Year: 2013

Time-varying data widely exists anywhere in the objective world, and whose diverse distribution as time is a hybrid stochastic process. Whereas, determining how to achieve knowledge from time-varying database is still an important content of data-mining. In fact, existing techniques of data-mining are difficult to deal with this problem. The paper deeply studies and analyses finite dimension distribution function families of stochastic process and gives out existent theorem of time-varying data classification, proposes a new more effective technique called time-varying datasets classification approach based on slide-window neural networks, and gives out smoothing algorithm and convergent condition with solving this problem as well as simulation examples. The result shows the proposed method is a very effective time-varying data classification method. © (2013) Trans Tech Publications, Switzerland.

Chen L.-Q.,Changzhou Institute of Technology | Du L.-L.,WuWei Occupational College | Li B.,Changzhou Institute of Technology
Energy Education Science and Technology Part A: Energy Science and Research | Year: 2014

This paper proposed a measuring parameter rebound voltage to realize real-time accurate estimation for state of charge (SOC) of power battery. On the basis of experimental data of SOC, rebound voltage and discharge current, a method which combined the features of grey prediction model and BP neural network prediction model was used to predict the data of SOC. By comparing the prediction data with practical data, the grey neural network method can achieve less error and the prediction accuracy is improved significantly. © Sila Science. All rights reserved.

Zhao M.,Wuwei Occupational College
2011 International Conference on Electric Information and Control Engineering, ICEICE 2011 - Proceedings | Year: 2011

Recently the earthquake occurs frequently and caused great loss and damage including the slope, the slope stability is very important for the people in the location, its failure will cause a large accident making a numerous loss for the people and society. The paper presents a Neural Network system predicting slope stability and utilizes the characteristics of an artificial intelligence approach and chooses some reasonable case to train and test in the system. As a result, it shows that the Neural Network system presented can be applied in the practical engineer and its accurate can be satisfied for the practical engineer. © 2011 IEEE.

Hu J.,Wuwei Occupational College
Proceedings - 2015 International Conference on Intelligent Transportation, Big Data and Smart City, ICITBS 2015 | Year: 2015

With the rapid development of Internet and information technology, detecting network intrusion behaviors have been attracted more and more attentions. In this paper, we proposed a novel network intrusion detection algorithm using a hybrid ant colony and support vector machine model. Main ideas of SVM are that it denotes a representation of the examples as points in space, and examples of the separate categories are separated by a gap. Afterwards, framework of the detecting network intrusion system is given, which is designed to promote the accuracy of detecting network intrusion by optimizing parameters of support vector machine with ant colony algorithm. Finally, four types of network attack behaviors are utilized in this experiment, that is, a) DOS, b) R2L, c) U2R, and d) Probe. Experimental results demonstrate that the proposed method is able to detect network intrusion with high accuracy. © 2016 IEEE.

Zhong S.-R.,Wuwei Occupational College
Wuli Xuebao/Acta Physica Sinica | Year: 2010

For nonlinear dust acoustic waves in unmagnetized dusty plasma containing cold dust grains and isothermal electrons and ions, small but finite amplitude nonlinear waves are governed by the Korteweg de Veries (KdV) equation. For weakly two-dimensional dust acoustic solitary waves in a dusty plasma with variable dust charge and two-temperature ions, we obtain a Kadomtsev-Petviashvili equation under higher order transverse disturbances for this system. The interactions between two solitons and three solitons propagating in arbitrary directions are investigated. It is found that the maximum amplitude in the interaction region between two same - amplitude solitons is about four times that of a single soliton, while for three solitons the maximum amplitude is nine times that of a single soliton. It suggests that the transverse perturbations for the weakly nonlinear solitary waves in dusty plasma with variable dust charge and two-temperature ions are stable. ©2010 Chin.Phys.Soc.

Wang Z.,Key Irrigation Station in Wuwei | Wang Z.,Chinese Ministry of Water Resources | Feng H.,Chinese Ministry of Water Resources | Wen G.,Wuwei Occupational College
Paiguan Jixie Gongcheng Xuebao/Journal of Drainage and Irrigation Machinery Engineering | Year: 2015

In order to achieve efficiently utilize water and fertilizer of seed maize in Shiyanghe basin, field experiments were conducted to study the effect of 4 factors, irrigation quota (A); irrigation frequency (B); topdressing frequency (C); topdressing quota (D), with 3 levels respectively on soil moisture and seed maize yields under ridges and furrows irrigation systems with film mulching. Results showed that irrigation quota had significant effect on the soil moisture of 60-100 cm soil profile in jointing when irrigation quota is more than 400 m3/hm2. In addition, it could significantly extend the vegetative growth cycle of seed maize and improve crop plant height; In comparison with other experimental factors, irrigation quota has the maximum effect, followed by irrigation frequency, topdressing frequency and topdressing quota. The water and nutrient schedule with irrigation quota of 500 m3/hm2 and total irrigation quota of 3 000 m3/hm2 with 6 irrigation frequency (seeding, pre-jointing, later jointing, heading, filling, mature, respectively) and topdressing quota of 200 kg/hm2 in jointing, was effective and optimal in Shiyanghe basin. ©, 2015, Editorial Department of Journal of Drainage and Irrigation Machinery Engineering. All right reserved.

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