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为实现分布式测量的农业小气候观测系统设计,需要设计一种体积小、成本相对较低的观测传感器。设计中应用STM32系统,采用现代电子设计技术及智能化的软硬件开发,实现传感器的设计制造。结果表明,应用STM32系统进行主控单元硬件设计,及STM32系统自带的标准库函数开发固化软件,不仅功能上能够满足要求,而且设计及生产成本均较低。设计完成的一体式传感器不仅能够更好地满足农业小气候观测需求,而且较集中控制方式的农业小气候观测系统有安装维护上的优势,其体积小,而且“全无线”设计,不会影响农事活动。基于物联网的智能化传感器设计为实现分布式测量打下了基础。 相似文献
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园艺设施是现代化农业产业中的重要成分,在农业现代化进程和乡村振兴战略中发挥着重要作用。本文通过文献研究和数据分析的方法重点研究了江苏省园艺设施的发展现状及趋势,通过分析江苏省三大园艺设施类型（塑料大棚、连栋温室、日光温室）的设施发展情况与配套设备,对四大种植模式（设施农业模式、观光农业模式、无土栽培模式、精准农业模式）进行归纳总结,寻找园艺设施现存的问题,提出农艺-设施-农机高度融合策略及四大趋势导向（产品市场趋势、产业提升趋势、现代化发展趋势和智能化生产趋势）是现代农业未来发展之路的观点。研究结果可为江苏省现代化设施园艺高效发展提供参考,并有望对江苏省园艺设施产业的未来快速发展提供借鉴。 相似文献
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果蔬分选是农业果蔬产后不可缺少的重要环节,以可编程逻辑控制技术为核心的自动化生产线为现代农业的智能化发展提供了新途径.为提高果蔬的分选效率,减少本地分选的人工成本,将数据采集、数据处理、无线通讯、智能控制等技术深度融合,研究一种可远程控制的果蔬智能分选机制,并通过可编程逻辑控制器(PLC)自动化数据采集与机械控制和.NET Core架构的分布式网络控制方法两方面对远程控制分选方案进行研究,配合合适的糖度-质量等果蔬品质模型,实现高速远程在线果蔬智能分选.基于该分选技术的软硬件方案进行试验,对控制策略和分选精确度进行仿真.结果表明,与传统的果蔬分选技术相比,该系统从系统成本、反应速度、分拣精度、管理效率等方面均有优势,果蔬分选精度能达93％以上,可以实现远程故障排查,节省了人工成本,具有推广应用价值. 相似文献
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On the present condition of fire control, we propose the fire intelligent monitor scheme based on Internet, which aims at urban fire in a large range. Then the overall structure and primary function modules of the system are discussed. Contrast with traditional fire-fighting mode, our system can identify and location fires automatically, shorten rescue time and increase operation efficiency through the application of intelligent fire identification and GIS. 相似文献
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Based on the systems engineering theory, this paper reviews the trend of researches and developments on vehicle semiactive suspension systems, analyzes states of researches on electrorheological fluids and magnetorheological fluids material,and puts forward semi_active suspension sytems based on magnetorheological fluids damper. On the basis of summing up existing methods for vibration control on semi_active suspension systems, emphases are put on the discussion of aplication of PID control. linear optimal control,adaptive control and intelligent control on the semi_active suspension systems. The compound control strategy is put forward based on the skyhook damping control theory, fuzzy control theory and adaptive control theory. Moreover, the integral idea about the research and development of semi_active suspension is based on MR damper,and discusses some theories and applied problems deserving research. 相似文献
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In system controlled,Sampling these parameters and with parameters for controller in time, it is an object to adaptive control. The article presents a scheme that the structure parameters on it's model and model parameters is robust identified by on line, while to optimal of algorithm on adaptive control is fulfilled. In control scheme, method of intelligent identifying to the structure parameters(levels of model) and algorithm of robust pole placement are introduced also It is advancer for already mentioned scheme. Whole scheme presents new model on adaptive control. 相似文献
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The problem on rocket safety control is important during the rocket launching proceeding, and is also the focus of every space country. The importance of rocket safety control is introduced, and the characteristics of the existing system are analyzed. Because of the special characteristics, the paper proposes an intelligent decision support system of rocket safety control, adopting the technique of artificial intelligent especially expert system. First, the authors introduce rocket safety control architecture and function. Then, a new method is proposed to represent the knowledge which is integrated with production rule and object-oriented technique. Furthermore, the reasoning is investigated, and decision-making network and uncertainty reasoning model are introduced. 相似文献
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In the intelligent control system with microprocessor controlling, the development of embedded software requires some simple and practical intelligent control algorithms. The algorithms can not only make the control system's performance good, but also meet the demands of real time control. Aim at the problem, it is presented that a fuzzy controller with simulating human intelligent control. The structure , control algorithms and the simulation results of the controller are given. The simulation and application show that the fuzzy controller with simulating human intelligent control has many advantages such as fast response, less overshoot, good robust. The design of the controller does not need the accuracy math model of controlled object. 相似文献
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小麦抗倒伏研究动态追踪——基于WoS和CNKI数据库的文献计量分析 总被引：1，自引：0，他引：1
为追踪小麦抗倒伏研究领域内的发展动态,基于科学引文数据库(Web of Science)和中国知网数据库(CNKI),对1990—2020年相关文献进行计量学分析,可视化呈现了该领域的研究态势。结果显示,近30年小麦抗倒伏研究逐渐成为作物学科研究的热点,研究机构主要集中于英国和中国。抗倒伏研究的代表性刊物为Field Crops Research、《麦类作物学报》等。研究方向主要为小麦倒伏遗传效应及基因定位、茎秆表型及组成物质与抗倒伏性能的关系、倒伏发生的评价与监测、倒伏防控的农艺措施等。随着学科间交叉融合,对小麦生长的全过程动态监控及智能调控,将成为小麦抗倒伏研究的重点。该分析结果有利于相关研究者深入了解小麦抗倒伏研究的发展趋势,为小麦抗倒伏理论与技术研究提供依据。 相似文献
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咸水淡化技术是开发利用海洋资源最合理的方式。文章从咸水直接灌溉带来的土壤盐渍化危害入手,概述了咸水处理与精准灌溉的意义,介绍了微咸水淡化流程和精准灌溉流程,提出了微咸水处理及精准灌溉的结合方式,展望了咸水淡化和节水灌溉的发展趋势,并分析了制约咸水淡化技术发展的能源和工艺2个因素。本研究得出,节水灌溉技术未来将集远程灌溉管理和综合调控分析于一体,真正实现智能化灌溉管理。将太阳能技术与纳滤技术相结合会创造广阔的市场前景,纳米颗粒膜和光热转化碳纤维等材料将是海水淡化研究的热点。因此,咸水淡化技术与精准灌溉相结合,其资源利用效率将大幅提高,土壤环境亦会得到极大改善,与未来生态科技的发展趋势将更加契合。 相似文献
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《保鲜与加工》2003,(10):87-92
IPv6 is the best protocol to replace IPv4, solve the jam of Internet facing nowadays, provide better service and development for next Internet because there is a huge address space, hiberarchy of addressing architecture, high-speed route, better security, better support for mobility and QoS. The document discourses at great length on the addressing architecture of IPv6, the addressing types of IPv6 and their connections with interface, the addressing model of IPv6 and the representation of detailed format and brief format for the IPv6's addressing, addressing prefixes and addressing types. And this specification discusses the addressing format, the addressing range and their uses of unicast, anycast and multicast. The paper has guide effect on constructing network of IPv6. 相似文献
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Intelligent materials, control devices and intelligent control algorithm research and development in recent years have opened a new world for seismic resistance and disaster reduction in civil engineering. We designed and fabricated a new piezoelectric friction damper. In our research, we regarded the piezoelectric friction damper as the control device. We proposed a fuzzy control algorithm for reducing nonlinear seismic response of a 3 story benchmark building and established the interactive relationships between structural responses and fuzzifier factors, defuzzifier factor. A numerical simulation is carried out to analyze the nonlinear seismic responses of the controlled 3 story benchmark building. The simulation results are compared to those of other control strategies. The results show that the fuzzy control can reduce the nonlinear seismic response of 3 story benchmark building and minimize the structural damage caused by strong earthquakes. 相似文献
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WEB(Web based Network Management) is new trend of Network Management.Features of WBM and related international standards are described.AI environment integrates with WBM is the next trend of network management too.Integrated and intelligent WBM system will be developed in the futare. 相似文献
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农业在中国经济发展中起着重要作用,是中国社会经济发展的基础。近年来,随着农业机械化以及科技现代化不断推进,多种现代科学技术逐渐在农业产业中得到应用,其中光伏发电技术在农业上的应用对于农业产业转型有着重要意义,是中国农业产业发展的强有力推手。光伏农业是将光伏发电与农业生产相结合的一种绿色、环保的全新产业模式,是集太阳能光伏发电、智能温控系统、现代高科技种植、养殖为一体的农业产业,有着非常广阔的应用前景。本研究综述了光伏农业中主要的几种结合形式：“光伏+种植业”、“光伏+畜禽业”以及“光伏+渔业”的业态,分析了各结合形式的研究现状和面临的问题,并对光伏农业发展趋势进行了合理展望,以期为未来光伏农业的发展提供参考。 相似文献
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物联网在中国现代农业中的应用 总被引：17，自引：0，他引：17
近几年来物联网技术受到了人们的广泛关注,笔者介绍了物联网的概念、历史与发展现状,以及物联网在中国农业中的初期应用。分析了物联网研究中的关键技术,包括RFID技术、传感器网络以及智能技术等。将物联网技术应用到农业生产和科研中是现代农业依托新型信息化应用的一大进步,可以改变粗放的农业经营管理方式,提高动植物疫情疫病防控能力,确保农产品质量安全,从而引领现代农业的发展,是物联网与农业领域的一次结合,对现代农业具有一定参考意义。 相似文献
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Presently, ECG monitor encounters the trend of miniaturizing, intelligentizing and networking. Short distance and limited channels are shortcomings of the existed telemetric ECG (Electrocardiograph) monitoring system, while the existed remote monitoring system has the disadvantages of high cost and low Data Transfer Rate. Furthermore, neither of these two systems can implement real-time monitoring on the spot. So, an embedded ECG Monitor based on Linux, which successfully solves these problems, is introduced. With embedded system technique, this embedded monitor, which can not only realize real-time monitoring on the spot, but also analyse the ECG data, has the advantages of low cost, small volume, light weight, low power, high stability, powerful networking function and so on. And by communicating through Internet, which has the features of low cost, high data transfer rate and good expandability, it can also send ECG data to monitoring center in order to achieve long-term monitoring. The development of this monitor provides a new solution for medical instruments' implementation and networking, and is of certain reference value. 相似文献
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By using a simple shear apparatus that is developed from RMT-150B,a series of simple shear tests of interface between saturated sand and structure under high normal stress were carried out to study constitutive law and shearing stiffness of interface to provide some theoretical evidences for design and calculation of projects concerned with mechanical problem of interface.In test,sand was consolidated in upper shearing box firstly,then,shear was started and testing data was recorded under high and constant normal stress.During the process,sand can deform relatively freely.It is shown that the relation curve between shear stress and shear displacement under high normal stress in simple shear tests is different from that in direct shear tests,and the complete shearing deformation process of interface under high stress can be described as a nonlinear elastic-perfect plastic form;Weibull distribution with three parameters can overcome the mathematical deficiencies of hyperbola in NEPP.The new model which is established by substituting Weibull distribution for the hyperbola of NEPP better agrees with the testing data.The regressive results of the initial shearing stiffness demonstrate that the linear function is slightly better than power function to express the relation between the initial shearing stiffness and normal stress.Based on the new interface model,the formula of tangential shearing stiffness is proposed,meantime,the change trend of tangential shearing stiffness of the new model is compared with that of NEPP. 相似文献
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分别利用中国知网(CNKI)和Science Direct(SD)搜索平台进行文献计量分析,采用国家知识产权局专利检索与分析平台检索分析专利授权情况,采用微软Bing搜索国际版搜索引擎搜集智能包装技术与产品,并进行归纳及整理,以追踪相关科学研究热点,分析相关产品的应用现状和发展方向。发现近二十年来,关于包装专用新型功能材料研究文献量最大;而知识产权方面,信息型智能包装授权明显高于其他类型,生产中应用也较多,是未来包装技术发展方向。 相似文献