宜兴农产品电子商务发展的制约因素及其对策研究

农业是典型的传统行业,具有季节性强、产品标准化低、企业素质较低等特点。发展农产品电子商务,电子商务与农产品的结合就必须消除许多阻碍,才能使两者有效地融合在一起。通过对宜兴农产品电子商务的发展现状和特点研究入手,分析发展农产品电子商务所面临的制约因素,提出进一步发展宜兴农产品电子商务的对策与措施。     

现代化温室生产效益评析

本对荷兰温室和我国引进温室的生产效益进行了比较，对各自的效益形成因素作了分析和评价，并针对如何提高现代化温室生产效益提出了思考和建议。     

线上体育教学的制约因素与对策研究

随着信息技术的发展,线上教学成为体育教育的重要组成部分.作者通过梳理相关文献,找出体育教学中存在的学情把握不准、教学内容单一、教学手段老套、学生能力欠缺等问题,并提出通过增加视频直播率、丰富课堂教学内容、提升教师信息素养、培养学生体育能力来解决相关问题,以达到为国家培养德、智、体、美、劳全面发展的卓越健康人才的目的.     

温室农业生产控制策略的组态设计

介绍了用于温室农业生产过程中控制策略的组态设计。给出了控制策略组态流程,描述了控制策略组态模块的主要功能,并就控制策略组态设计中两个关键技术———模块间逻辑关系的判断和拓扑排序作了详细讨论。组态过程灵活、直观。组态系统可以实现任意控制流程,具有易用性、开放性和通用性等特点。     

温室农业生产控制策略的组态设计

介绍了用于温室农业生产过程中控制策略的组态设计.给出了控制策略组态流程,描述了控制策略组态模块的主要功能,并就控制策略组态设计中两个关键技术--模块间逻辑关系的判断和拓扑排序作了详细讨论.组态过程灵活、直观.组态系统可以实现任意控制流程,具有易用性、开放性和通用性等特点.     

基于PLC的智能温室监控系统研究

从PLC角度出发,阐述了智能温室监控系统的主要构成,并对PLC控制软件的设计行进了研究。这方面的研究能够促使智能温室监控系统向更高的水平发展,对我国的温室种植发展起到一定的推动作用。     

论和谐社会如何应用发展的眼光推进农业机械化发展

我国农业发展正面临着转型阶段,从传统农业现代农业的转变是我国农业发展中最为关键的部分,实现现代农业的重要途径是促进农业机械化发展。本文在分析传统农业向现代农业的转变中,从和谐社会建设入手,详细分析了我国现代农业机械化发展,以期能够对我国现代农业以及和谐社会的建设提供一定的借鉴意义。     

基于WIN CE6.0的自动化温室生产控制系统设计

本文针对我国温室生产中存在的问题,设计了现代化自动温室生产控制系统。系统以Intel Xscale 270和Windows CE 6.0为核心,通过软硬件实现了实时温室环境参数采集、自动和人工控制灌溉作业、智能化温室天窗控制、温度调节、智能化机器人作业等功能。该系统可应用于现代化温室生产过程中。     

林业分类经营的制约因素分析与对策

林业分类经营的本质和关键问题是林业生产力重新布局问题和林业管理体制与政策问题.目前林业分类经营的制约因素一是林业投入不足;二是林地面积有限;三是富余劳动力多;四是森林资源管理体制滞后.相应的发展对策一是选择适宜的融资方式;二是提高林地生产力;三是转移剩余劳动力;四是建立新型的管理体制.     

Artificial intelligence,or the mechanization of work

AI is supposed to be a scientific research program for developing and analyzing computer-based systems that mimic natural psychological processes. I argue that this is a mere fiction, a convenient myth. In reality, AI is a technology for reorganizing the relations of production in workplaces, and specifically for increasing management control. The appeal of the AI myth thus serves as ideological justification for increasing managerial domination. By focusing on the AI myth, critics of AI are diverting themselves from the very important task of preventing this increasingly dangerous threat to deskill and dehumanize large sectors of the workforce. Personal history Edward S. Reed was educated in Philosophy of Science at Boston University, and in Psychology at the University of Edinburgh. He directed the project in Cognition and Action at the University of Minnesota, Center for Research in Human Learning, 1980–1982. At present he is an assistant Professor of Philosophy at Drexel University, and a Research Consultant for the Drucker Brain Injury Center of Moss Rehabilitation Hospital, both in Philadelphia. His biography of the psychologist James Gibson,Revolution in Perception, will be published by Yale University Press in 1988.     

当前农业结构调整中存在的问题及对策

农业产业结构调整是我国农村经济进入新的历史发展阶段的必然选择,对增加农民收入具有十分重要的历史和现实意义.但在农业结构调整过程中存在一些突出问题,如调整的盲目性,信息的滞后性和观念的狭隘性等,针对这些问题就推进农业结构调整的主要对策作一探讨.     

我国水果业良性发展存在的问题及对策

为了使中国的水果业走上良性发展的道路,避免过去几年"果贱伤农"现象的发生,应该采取一定的技术和政策措施.应在水果的区域发展和地区分工方面注重各种水果最佳适宜区的发展.在结构调整方面注重各树种的合理搭配,同时注意每种树种中早、中、晚熟品种的比例,适当增加加工品种的比例.积极完善水果市场体系的建设,促进全国统一水果批发市场体系的形成.大力促进中国水果的出口.适应市场需求,实现中国水果的产业化发展.政府在信息、金融信贷和优惠政策方面予以宏观扶持.     

现代温室中湿度的测量

本文分析了现代农业温室中湿度对植物生长的影响,介绍了用热敏电阻的干湿球法测量湿度的原理和着重介绍了利用单片机进行湿度测量的方法,还分析了影响湿度测量的因素。该方法在现代温室中有很好的实用性。     

The influence of individual and contextual work factors on workers' compliance with health and safety routines

This study investigated the relationships between workers’ compliance with health and safety (H&S) routines and instructions adopted in the company (dependent variable) and psychological demands, decision authority, social support, management support, unionization and H&S management system (independent variables). A cross-sectional questionnaire study was performed among 1051 workers and the managers of 102 small- and medium-sized motor vehicle repair garages. Multilevel modeling was performed to account for the hierarchical structure of the data. At the worker level, high compliance with H&S routines correlated significantly with both social support and H&S-related management support. At the garage level, mean management support and a well-developed H&S management system correlated significantly with high workers’ compliance. Changing both the individual and contextual factors in the work environment may thus increase workers’ participation in H&S activities.     

Algorithmization and mechanization of the Cauchy problem associated with the plate equation

This paper develops the algorithm and mechanization of the Cauchy problem associated with the plate equation. The solution is obtained in terms of the initial data on the deflection of the plate and the load term. Thereafter, the algorithmization formulae are used in MAPLE to solve the Cauchy problem automatically.     

Real-time indicators and influence factors of muscle fatigue in push-type work

Muscle fatigue is a significant cause of musculoskeletal injury and can easily induce unsafe behaviour. Push-type work is a common type of physical work, and if not designed appropriately, may lead to muscle fatigue. Previous studies on muscle fatigue mainly focus on investigating continuous force exertion, and in most of them, a constant muscle force is assumed, thereby ignoring the fluctuations present in exertion. In this study, bolt hole drilling was chosen to represent typical push-type work, and the muscle fatigue from this work was examined. The experimental system designed in this study monitored the muscle force in real time. In the experiments, different thrust angles (15°, 45°, and 75°), different relative force values (20% MVC, 40% MVC, and 60% MVC; MVC: maximum voluntary contraction) and different working time intervals (0 s, 30 s, 60 s, and 90 s) were considered. The results demonstrate that there is a significant positive correlation between the rating of perceived exertion (RPE) and muscle force attenuation (r = 0.786, p = 0). The cubic regression model (Y = − 0.00071x³ − 0.024x² − 0.334x + 1.146, R² = 0.639) fits the data most closely. Therefore, force attenuation can be used as a real-time indicator of muscle fatigue. In addition, the relative force value and thrust angle have a significant impact on the RPE score, whereas the working time interval has no major effect on it. This study provides a new method for evaluating muscle fatigue and a basis for the design of push-type work to reduce fatigue-induced accidents and musculoskeletal injuries.     

基于小波变换的例外挖掘

1 引言例外常常是指数据集中远远偏离其它对象的那些小比例对象,在大多数研究中作为噪声被遗弃。但是在一些应用中,例外的检测能为我们提供比较重要的信息,使我们发现一些真实而又出乎预料的知识,具有很高的实用价值,如文挖掘了时序数据中的例外,从而在存储容量相同的情况下,可以获得对原始序列更精确的表示。目前例外挖掘方法可以广义地分为3类:基于分布的方法、基于深度的方法及基于距离的方法。基于深度的方法避免了基于分布的方法中的分布适应性问题,扩展了例外挖掘的应用,但已有的基于深度的方法只有在数据维数k≤2时,效果才被人们接受。基于距离的方法不受数据维数的限制,超越了数据空间,它仅仅依赖于米制距离函数的距离值计算。     

网络信息安全面临的主要威胁及对策

由于互联网络的发展,计算机网络在政治、经济和生活的各个领域正在迅速普及,全社会对网络的依赖程度也变越来越高。但伴随着网络技术的发展和进步,网络信息安全问题已变得日益突出和重要。因此,了解网络面临的各种威胁,采取有力措施,防范和消除这些隐患,已成为保证网络信息安全的重点。