检索结果-南通市图书馆

Design and optimization of torsion harvester of Lycium barbarum L.

在线全文

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2024年第4期17卷 109-115页

作者： Qingyu Chen Shixia Zhang Naishuo Wei Puhang Li guangrui hu Jun Chen Yu Chen College of Mechanical and Electronic Engineering Northwest A&F UniversityYangling 712100ShaanxiChina

The production of Lycium barbarum *** a labor-intensive *** manual harvests are required during the harvesting season,which contributes to the high harvesting *** cultivation conditions of *** were investigated to increase efficiency and mitigate harvesting damage.A torsion harvester was designed according to the characteristic of infinite inflorescence and the distribution of detachment force,and the kinematics model of the harvester was *** vibration responses of ripe and unripe fruit were obtained through ADAMS simulation of the branch model,and the influencing factors and value range of the torsion harvester were also *** mathematical models of ripe fruit harvesting rate,unripe fruit harvesting rate,ripe fruit damage rate and torsion angle,vibration rods distance,and vibration frequency were established by the Box-Behnken *** influences of various factors on ripe fruit harvesting rate,unripe fruit harvesting rate,and ripe fruit damage rate were analyzed,and the best parameter combination was obtained:torsion angle 73.66°,vibration rods distance 35.51 mm and vibration frequency 19.12 *** experiment showed that the harvesting rate of ripe fruit is 95.67%,the harvesting rate of unripe fruit is 4.68%,and the damage rate of ripe fruit is 3.70%.The research results can promote the mechanization process of *** harvest,and provide a reference for vibration harvest of berries.

关键词： L.barbarum vibrating torsion response surface method parameters optimization ADAMS RSM

Research hotspots and development trends of harvesting robots based on bibliometric analysis and knowledge graphs

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

International Journal of Agricultural and Biological Engineering 2024年第6期17卷 1-10页

作者： Jianguo Zhou Yingkuan Wang Jun Chen Tongyun Luo guangrui hu Jionglong Jia Adilet Sugirbay College of Mechanical and Electronic Engineering Northwest A&F UniversityYangling 712100ShaanxiChina Academy of Agricultural Planning and Engineering Ministry of Agriculture and Rural AffairsBeijing 100125China Chinese Society of Agricultural Engineering Beijing 100125China School of Design Xi’an Technological UniversityXi’an 710021China West Kazakhstan Agrarian-Technical University Named After Zhangir Khan Uralsk 090009Kazakhstan

Over the past 30 years,there has been continuous progress in global science and ***,many agricultural products still heavily rely on traditional methods of manual and mechanical harvesting,facing challenges such as high costs and low *** address these challenges,researchers have developed various harvesting robots to handle diverse tasks in complex farm *** study analyzed pertinent papers on harvesting robots retrieved from the Web of Science(WOS)core database and the China National Knowledge Infrastructure(CNKI)database,spanning the years 1993 to *** specialized software such as CiteSpace and VOSviewer,a bibliometric analysis was conducted to examine the research progress and hotspots in the field of harvesting *** analysis of 517 English papers indicated a continuous expansion in the research scale of harvesting ***,the research history can be divided into three distinct ***,research on harvesting robots is experiencing a rapid growth phase,with the number of related papers steadily increasing each *** the year 2022 alone,151 English papers were *** growth is attributed to close collaborations among different countries/regions,institutions,and ***,the United States,and Japan play crucial roles in the research of harvesting ***,China has published 326 English papers,ranking first *** analysis,it was also found that Chinese papers focused on harvesting robots earlier,thereby promoting the development of agricultural ***,bibliometric analysis revealed that the research hotspots of harvesting robots mainly include system and structure design,object recognition and localization,and multi-robot coordination,among *** the future,development trends of harvesting robots will focus on:1)diversifying robot types,2)expanding application scenarios,3)enhancing overall performance to reduce losses,and 4)reducing manufacturing co

关键词： harvesting robots crops harvesting bibliometric analysis research hotspots development trends

Investigation of the pin-roller metering device and tube effect for wheat seeds and granular fertilizers based on DEM

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

International Journal of Agricultural and Biological Engineering 2023年第2期16卷 103-114页

作者： Sugirbay Adilet Kaiyuan Zhao Guangyao Liu Nukeshev Sayakhat Jun Chen guangrui hu Lingxin Bu Yu Chen Hongling Jin Shuo Zhang Zagainov Nikolay Muratkhan Marat College of Mechanical and Electronic Engineering Northwest A&F UniversityXianyang 712100ShaanxiChina College of Water Resources and Architectural Engineering Northwest A&F UniversityXianyang 712100ShaanxiChina Technical Faculty S.Seifullin Kazakh Agrotechnical UniversityAstana 010000Kazakhstan College of Mechatronic Engineering North Minzu UniversityYinchuan 750021China

The metering device is the central part of the seeder discharging granular fertilizers or seeds from the hopper to the colter passing through the *** on the metering device design,the batches of particles are discharged or discharged *** research analyzes existing metering devices,and a new pin-roller metering device is recommended to discharge evenly high doses of granular fertilizers and wheat seeds at low rotation *** objective was to adapt the metering device to precision agriculture so that a little electric motor containing gearbox drives every metering ***,the pin-roller metering device parameters were investigated to apply high doses of granular fertilizers and wheat seeds *** optimal pin positions were determined according to response surface methods(RSM)by simulating the granular fertilizers and wheat seeds'behavior on *** coefficient of variation(CV)and the slip rate(SR)of the particles between the pins were chosen as indicators for evaluating the *** shape of the pin was specified,and then the number of lines,the number of pins in a line,and the pin height were chosen to *** analysis of the simulation results shows the optimal parameters:the number of pins in a line is four,and the number of lines is *** SR of granular fertilizers and wheat seeds were 8%and 2%,*** pin-roller metering device is compared with the six-grooved and twelve-grooved metering *** comparison results show that the pin-roller metering device distributes twice more uniformly than other metering *** CV of the granular fertilizer distribution for six-grooved,twelve-grooved,and pin-roller metering devices was 111.13%,80.74%,and 37%,*** CV of the wheat seed distribution for twelve-grooved and pin-roller metering devices was 96%,and 37%,*** long as the particles interact with the tube,leaving the metering device,the effect of tube type and position is investi

关键词： pin-roller metering device DEM coefficient of variation slippage rate tube

BLIND SIGNAL SEPARATION BASED ON ME AND STATISTICAL ESTIMATION

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

Journal of Electronics(China) 1999年第2期16卷 165-171页

作者： Yu Xiao hu guangrui(Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200052) Department of Electronic Engineering Shanghai Jiaotong University Shanghai

There are two major approaches for Blind Signal Separation (BSS) problem: Maximum Entropy (ME) and Minimum Mutual Information (MMI) algorithms. Based on the recursive architecture and the relationship between the ME and MMI algorithms, an Extended ME(EME) algorithm is proposed by using probability density function (pdf) estimation of the outputs to deduce the corresponding iterative formulas in BSS. Based on the simulation results, it can be concluded that the proposed algorithm has better performances than the traditional ME algorithm in convolute mixture BSS problems.

关键词： Blind Signal Separation (BSS) EME algorithm Recursive architecture pdf estimation

在线全文

学校读者我要写书评

暂无评论

基于神经网络的地震剖面反褶积新方法

上海交通大学学报 1996年第3期30卷 154-159页

作者：胡光锐朱军上海交通大学电子工程系上海

地震剖面的反褶积经常是地震勘探资料处理阶段的一个重要步骤，它是公认的提高剖面分辨率的有效方法．常规的反褶积方法已经很多，但如何在提高剖面分辨率的同时又有效地抑制噪声，提高剖面的信噪比，始终是困扰人们的问题．针对这一问... 详细信息

地震剖面的反褶积经常是地震勘探资料处理阶段的一个重要步骤，它是公认的提高剖面分辨率的有效方法．常规的反褶积方法已经很多，但如何在提高剖面分辨率的同时又有效地抑制噪声，提高剖面的信噪比，始终是困扰人们的问题．针对这一问题，提出了一种基于反馈神经网络及其衍生物（ＴＨ网络）的地震剖面反褶积方法．实验结果表明，本方法效果明显，尤其在地震剖面中存在一些相隔较远的反射层时有很好的效果，充分显示了神经网络方法处理地震剖面反褶积问题的有效性．

关键词：信号处理地震剖面反褶积神经网络地震勘探

ESTIMATION OF HMM PARAMETERS BASED ON GRADIENTS

在线全文

学校读者我要写书评

暂无评论

Journal of Electronics(China) 2001年第3期18卷 277-280页

作者： Mao Xiaoquan hu guangrui(Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030) Department of Electronic Engineering Shanghai Jiaotong University Shanghai

Based on the matrix representation, a new method is proposed to calculate the partial derivatives of the likelihood probability of an HMM with respect to its parameters. Experimental results are presented and a compar... 详细信息

关键词： HMM Gradients

CYCLOSTATIONARY MODEL IN DS SPREAD SPECTRUM COMMUNICATION SYSTEM

在线全文

学校读者我要写书评

暂无评论

Journal of Electronics(China) 2002年第2期19卷 172-174页

作者： Gong Xiangyang hu guangrui (Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030) Department of Electronic Engineering Shanghai Jiaotong University Shanghai

During the past research, Direct Sequence (DS) Spread Spectrum (SS) signal is modeled as stationary in most cases. Cyclostationary model for SS signal is introduced in this letter. Compared with stationary model, cycl... 详细信息

关键词： Cyclostationary Stationary Spread spectrum

在线全文

学校读者我要写书评

暂无评论

基于ART神经网络的地震剖面反褶积新方法

上海交通大学学报 1996年第9期30卷 75-80页

作者：胡光锐朱军上海交通大学电子工程系上海

提出一种基于ＡＲＴ神经网络（及其改型）从地震剖面中识别子波的新方法．发挥神经网络在模式识别和优化计算两方面的优势，先以无教师学习算法从剖面中识别出子波，再通过ＴＨ神经网络作反褶积．实验结果表明，本文提出的方法有明显的... 详细信息

提出一种基于ＡＲＴ神经网络（及其改型）从地震剖面中识别子波的新方法．发挥神经网络在模式识别和优化计算两方面的优势，先以无教师学习算法从剖面中识别出子波，再通过ＴＨ神经网络作反褶积．实验结果表明，本文提出的方法有明显的效果，特别在地震剖面中存在一些相隔较远的反射层时有很好的效果．

关键词：地震剖面反褶积神经网络信号处理地震勘探

AN IMPROVED GENETIC ALGORITHM FOR SEARCHING OPTIMAL PARAMETERS IN n-DIMENSIONAL SPACE

在线全文

学校读者我要写书评

暂无评论

Journal of Electronics(China) 2002年第2期19卷 218-219页

作者： Tang Bin hu guangrui(Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030) Department of Electronic Engineering Shanghai Jiaotong University Shanghai

An improved genetic algorithm for searching optimal parameters in n-dimensional space is presented, which encodes movement direction and distance and searches from coarse to precise. The algorithm can realize global optimization and improve the search efficiency, and can be applied effectively in industrial optimization, data mining and pattern recognition.

关键词： Genetic algorithm Genetic chain operation Data mining