2010 Third International Conference on Information and Computing最新文献_第4页

Research on the Forecast of Cultivated Land Variation Trend in Rapidly Urbanization Area: A Case Study of Wujiang City 快速城市化地区耕地变化趋势预测研究——以吴江市为例

2010 Third International Conference on Information and Computing Pub Date : 2010-06-04 DOI: 10.1109/ICIC.2010.54

Q. Li, Xu Yannan, Wang Xi

{"title":"Research on the Forecast of Cultivated Land Variation Trend in Rapidly Urbanization Area: A Case Study of Wujiang City","authors":"Q. Li, Xu Yannan, Wang Xi","doi":"10.1109/ICIC.2010.54","DOIUrl":"https://doi.org/10.1109/ICIC.2010.54","url":null,"abstract":"The city of Wujiang, which locates at the center of the Yangtze River delta, is a relatively ideal case for study because it is a typical area that experiences the rapid urbanization. According to the statistical and survey data at county level during the past 20 years, this article establishes a predicting model by comprehensively using both PCA and BP neural networks. Principal component analysis is firstly used to preprocess input variables in order to raise the network’s operational efficiency. While establishing the model of BP neural networks, it uses the data from 1990-2004 as the learning samples and that from 2005-2007 as the testing samples. The results show that the relative errors between the predicted value and the actual value are all less than 1.15%, which indicates that the neural network technique has a big power in the study of forecasting of cultivated area and the train of thought is reasonable. Finally the model established is used to do the simulated predication of the cultivated area for the year of 2010 in Wujiang, and the result shows that under the guidance of current policy, the decreasing rate of the cultivated area in the city of Wujiang dramatically drops.","PeriodicalId":176212,"journal":{"name":"2010 Third International Conference on Information and Computing","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132207701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation of Tail-slap Loads of Supercavitating Projectiles 超空泡弹丸尾扇载荷仿真

2010 Third International Conference on Information and Computing Pub Date : 2010-06-04 DOI: 10.1109/ICIC.2010.135

Jia-zhong Zhang, Jin-Sheng Zhang, Yingjie Wei

引用次数: 3

Multi-objective Optimization Design of Automobile Suspension Helical Spring 汽车悬架螺旋弹簧多目标优化设计

2010 Third International Conference on Information and Computing Pub Date : 2010-06-04 DOI: 10.1109/ICIC.2010.62

Qin-man Fan, Yong-hai Wu, Luan Kun, Wang Feng

引用次数: 3

Design and Implementation of Remote Monitoring and Control System for Freight Train Load Testing 货运列车载荷试验远程监控系统的设计与实现

2010 Third International Conference on Information and Computing Pub Date : 2010-06-04 DOI: 10.1109/ICIC.2010.36

Guozheng Li, Nanlin Tan

引用次数: 2

Experimental Study on Effect of Three-dimensional Stresses on Permeability of Coalbed Gas-water Double State Flow 三维应力对煤层气-水双态渗流渗透率影响的实验研究

2010 Third International Conference on Information and Computing Pub Date : 2010-06-04 DOI: 10.1109/ICIC.2010.308

Lv Xiang-Feng, Pan Yi-shan, Liu Jian-jun, Tang Ju-peng

{"title":"Experimental Study on Effect of Three-dimensional Stresses on Permeability of Coalbed Gas-water Double State Flow","authors":"Lv Xiang-Feng, Pan Yi-shan, Liu Jian-jun, Tang Ju-peng","doi":"10.1109/ICIC.2010.308","DOIUrl":"https://doi.org/10.1109/ICIC.2010.308","url":null,"abstract":"The absolute permeability of coal, relative permeability of gas-water are necessary parameters to forecasting the birth rate of coalbed methane and water in mining. Taking Tiandiwangpo Mine in Jincheng for example, using steady-state method, the experiment of absolute permeability of coal, relative permeability of gas-water double state flow in the coalbed methane(CBM) reservoir were simulated under the condition of changing load and pore pressure. The relative permeability curves of coalbed gas-water were obtained. The relationship between effective stress and effective permeability of gas and water were studied. Some new laws are presented as follows: (1)with the increasing of confining pressure, the relative permeability of gas-water are increased slightly, it is proved that confining pressure has a great effect on the absolute permeability of coal, (2)a lower critical value of effective stress exists, the effective permeability of gas and water will decrease rapidly with the increase of effective stress when it is smaller than it. For the coal sample No.3, the lower critical effective stress is about 2.7MPa, (3) On the other hand, a upper critical value of effective stress is found, the effective permeability of gas and water will decrease slightly with the increase of effective stress when it is bigger than it. For the coal sample No.3, the upper critical effective stress is about 8.5MPa, (4) along with the increasing of the pore and the cranny, the effective permeability of gas and water increased as the pore pressure increased. The relational expressions for effective stress and the effective permeability of water and gas were studied. The experimental results can provide a theoretical basis for reasonable drainage of coalbed methane(CBM).","PeriodicalId":176212,"journal":{"name":"2010 Third International Conference on Information and Computing","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126592022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Existence of Multiple Periodic Solution of a Predator-Prey System with Infinite Delay 一类无穷时滞捕食-食饵系统多周期解的存在性

2010 Third International Conference on Information and Computing Pub Date : 2010-06-04 DOI: 10.1109/ICIC.2010.26

Pan Gao, Rong Cheng

引用次数: 0

An Optimized Fourth Order Runge-Kutta Method 优化的四阶龙格-库塔法

2010 Third International Conference on Information and Computing Pub Date : 2010-06-04 DOI: 10.1109/ICIC.2010.195

Xiong You, Xinmeng Yao, Xin Shu

引用次数: 3

Study on Settlement Time Property of Composite Foundation 复合地基沉降时间特性研究

2010 Third International Conference on Information and Computing Pub Date : 2010-06-04 DOI: 10.1109/ICIC.2010.109

Jiang Long, Yang Hui

引用次数: 0

Design of a PKI-Based Secure Architecture for Mobile E-Commerce 基于pki的移动电子商务安全体系结构设计

2010 Third International Conference on Information and Computing Pub Date : 2010-06-04 DOI: 10.1109/ICIC.2010.31

Wu Yanyan

引用次数: 2

Research of Autocontrol System with Variable Speed for Hydraulic Log-core Veneer Lathe Based on Single-chip Computer 基于单片机的液压长芯贴面机变速自动控制系统研究

2010 Third International Conference on Information and Computing Pub Date : 2010-06-04 DOI: 10.1109/ICIC.2010.193

Guang-ming Xiong, Xia Lu

引用次数: 0