检索结果-南通市图书馆

Study on analysis model of Millet Yield Loss Caused by Weeds in Summer Season Millet Field

Plant Diseases and Pests 2013年第2期4卷 36-39页

作者： Lv Peng Duan Xishun Liu Hongxia Hou Shenglin Bo Kuiyong Wang Xinyu Xiang Jinying Ma Xue Jia Haiyan Zhou Hanzhang National Millet Improvement Center/Hebei Branch of National Sorghum Improvement Center/Millet Institute of Hebei Academy of Agricultural and Forestry Science/Key Laboratory of Minor Crops in Hebei Province Seed Management Station of Shijiazhuang Vocational and Technical Education Center of Shenze County

Weed management in summer season foxtall millet field was studied by evaluating weed damage and exploring competition between weeds and foxtail millet, and a few fitting models were simulated and compared by employing field plot experiment and nonlinear regression analysis. The results showed that the millet yield losses and weed density were extremely significantly correlated. Among the tested models, the determination coefficient （ R2 ） of hyperbolic model was 0.997 12, and minimum residual sum of squares was 16.174, which was considered the optimal model to simulate the competition relation between weeds and millet. The predicted equation was Y = d/（ 1. 733 ＋ 0. 018d） ; the interspecific competitiveness of weeds was 0. 577 0 and the intraspecific competitiveness was 0.010 3 ; the maximum loss rate of millet yield was 55.56%. This study had established an analysis model with high gcodness-of-fit and practical prediction which could help weed management in summer season millet field.

关键词： Millet field Weeds Yield loss analysis model

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

An analysis model of Sports Human Body Based on Computer Vision Tracking Technology

引用

International Journal of Technology Management 2017年第4期 71-73页

作者： Mingzhu Yuan Public Physical Education Teaching Department Fuzhou University of International Studies and Trade

This paper proposes the analysis model of sports human body based on computer vision tracking technology. Visual target tracking is an important research field of the computer vision, motion trajectory and it can provide not only the goal, to provide the initial data movement analysis, scene understanding, behavior or the event detection in intelligent surveillance, human-computer interaction, robot visual navigation and motion recognition based on field has a broad application prospect. For this reason, it is possible to consider the use of a large number of unlabeled samples to assist the training classifier to improve its performance. This type of machine learning method using both labeled and that unlabeled samples is called the semi-supervised learning. This paper proposes the novel idea of the related research topics to propose the new perspective of the model that will be later give us the novel idea of making it efficient for further development of sport science.

关键词： Human Body analysis model Computer Vision Tracking Technology

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A Queuing Network analysis model in Emergency Departments 25th

A Queuing Network Analysis Model in Emergency Departments

引用

第25届中国控制与决策会议

作者： Huabo Zhu Jun Gong Jiafu Tang College of Information Science and Engineering Northeastern University State Key Laboratory of Synthetical Automation for Process Industries (Northeastern University)

ISBN: (纸本)9781467355339

This paper establishes a general multi-stage queuing network model with feedback patient flow to analyze the behavior of patients flow among the stages and the performance of emergency departments（ED） in a hospital. The queuing network is decomposed into a set of single queuing systems that include a tandem queuing and a closed queuing system. The parameter values of the system are obtained from observations through parameter estimation. The complex interaction between the neighbor stages is analyzed and the expression of the patients flow between different stages is calculated in steady state by routing probability in the system. The main performance indicator formulas are developed and results are derived by using the parameter values. Some insights are derived from experiment and numeric analysis in a case study.

关键词： Queuing Network Emergency Department analysis model Performance Indicator

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Research on CNC Integrated Manufacturing Condition analysis model and Its Application Based on Visual Multi-Feature Fusion

Research on CNC Integrated Manufacturing Condition Analysis ...

引用

2010 Chinese Control and Decision Conference

作者： Libing Liu~1,Yingshu Chen~1,Jiahang Li~1,Xiankai Li~2,Dawei Tian~2 1.School of Mechanical Engeering,Hebei University of Technology,Tianjin,300130 2.ShenYang Machine Tool Group,China

＜正＞A visual diagnosis method for flexible CNC manufacturing condition monitoring is proposed based on multi-feature space ***,the generalized sensor space and the observable feature vector are analyzed and ***,based on image processing technologies,the method for establishing clustering fusion model of complex condition is *** last,the visual multi-feature clustering fusion model is *** model works quickly and accurately.

关键词： CNC Integrated Manufacturing Complex Condition Multi-Feature Clustering Fusion analysis model

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Analytical model of shear mechanical behaviour of bolted rock joints considering influence of normal stress on bolt guide rail effect

引用

Journal of Central South University 2021年第5期28卷 1505-1518页

作者： ZHENG Luo-bin WANG Liang-qing ZHU Lin-feng Faculty of Engineering China University of GeosciencesWuhan 430074China

Rock bolts have been widely used in slopes as a reinforcement *** the shear mechanical behaviours of bolted rock joints is very complicated due to the complex factors that affect the axial force and shear force on the *** bolts under shear action exhibit the guide rail effect;that is,the rock mass slides along the rock bolt as if the rock bolt is a *** normal stress can inhibit the guide rail effect and reduce the axial force on ***,this factor is not considered by the existing analysis *** tests of bolted joints under different normal stresses were carried out in the *** the test,the axial force on each point monitored on the bolt was recorded by a strain gauge,and the attenuation trend of the strain was *** analytical model that considers the inhibition of the bolt rail effect due to an increase in the normal stress was proposed to predict the shear mechanical behaviour of rock bolted *** new model accommodates the bolt shear behaviours in the elastic stage and plastic stage,and the estimated values agree well with the results of the direct shear tests in the *** validation shows that the proposed model can effectively describe the deformation characteristics of the bolts in the shear tests.

关键词： bolted rock joints shear test shear behaviour analysis model

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Nonlinear Dynamic analysis of Flexible Marine-Risers

引用

China Ocean Engineering 1991年第4期6卷 373-384页

作者： Chen Jiajing and Wang Dongjiao Professor, South China University of Technology, Guangzhou PhD Student, Hong Kong Polytechnic Formerly, South China University of Technology, Guangzhou

A nonlinear dynamic analysis model is estabilished on the basis of 'lumped mass' approach, which takes the influence of the fluid flow within the pipe into consideration. Numerical results are compared with the published works, and the effects of internal fluid flow, internal pressure, dyanmics as well as the nonlinear characteristics on the behavior of flexible risers are discussed. From this work, some useful conclusions are drawn.

关键词： flexible riser nonlinear dynamic analysis model irregular wave oilfield exploitation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

FLOOD REMOTE SENSING MONITORING AND DAMAGE EVALU ATION INFOR-MATION SYSTEM

引用

Progress in Natural Science:Materials International 1991年第4期 307-314页

作者：陈述彭黄绚 Beijing 100101 PRC State Key Laboratory of Resources and Environment Information System Academia Sinica

Ⅰ.EXPERIMENTAL SYSTEM FOR FLOOD CONTROL AND DISASTER RELIEF IN CHINASimilar to other Asian countries,affected by the monsoon climate,the flood disastersof China have been very severe since ancient *** in the middle a... 详细信息

关键词： remote sensing monitoring disaster evaluation geographic information system analysis model

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Investigation for Smartfood’s Market Ability Based on Regression analysis

引用

Management Studies 2022年第3期10卷 147-154页

作者： LI Runshi SHEN Tzuying TING Tzuyun Beihang University BeijingChina Shanghai Soong Ching Ling School International Division ShanghaiChina Shanghai High School International Division ShanghaiChina

Product Development at Smartfood is considering adding a new low-carbohydrate food product labeled K-Pack to their product ***,the company needs to estimate the product’s profit potential and choose the best marketing *** order to investigate the different factors’impact on sales,we establish a multiple regression *** our model,we consider selling price,advertisement payment,and selling location as independent variables and the sale is a dependent *** on the empirical test,we found that the sales of the product increase as the selling price and the ads investment increase,and locations near bakery sections lead to higher *** also found that the final profits increase as the selling price and the ads investment *** a result of the analysis made with the model,we provide the company with a full-scale estimation of sales and suggestions on their marketing strategy:higher price,higher advertisement payment,and selling locations near the stores’bakery *** with the original prediction made by the company’s staff,the methods followed are more accurate and provide suggestions more specifically.

关键词： multiple regression analysis model marketing strategy advertisement payment

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：