Therefore , it is necessary to establish the system of the multi - component detection on - line for circulation nutrient - liquid . on - line detection of nutrient liquid is used to adjust components concentrations of nutrient liquid in term of variable growth requirement . this research is helpful to provide an efficient approach from greenhouse agriculture to precision agriculture and concentrated agriculture 营养液浓度的合理调配是保证作物健康生长的关键，因此，营养液多组分在线检测系统的建立，有利于根据作物生长全阶段对营养需求的不同进行营养液的动态合理调配，为设施农业走向“精准农业” 、 “高效农业”提供一条有效的途径。
The transformation from suburban agriculture to urban agriculture should be realized hi order to improve the competitive power of the agriculture of beibei hi market . the developing direction and emphases are fringe industry between agriculture and industry of tour , agriculture and industry of service , agriculture and industry . in a word , city agriculture based on service and experience should be developed to increase the proportion of fringe industry in rural economics 其方向和重点是大力发展农业与旅游业、农业与服务业、农业与工业之间的边缘产业，即服务型和体验型的都市农业类型，提高边缘产业在农村经济构成中的比重；产品型都市农业发展要充分利用城市经济的带动作用，积极发展高效农业、设施农业，突出菜、果、花三大特色产业。
At last , the test on the network communication portion was implemented , and the result proved the communication portion is reliable . the design of internet communication portion involves software 、 hardware and network technology . the design of ethernet driver software and protocol serve software of 32bit mpu , not only helpful to the development of modern agriculture measure and control system , but also to the application of embedded system on information devices 对整个网络通讯部分统一进行了测试，测试结果表明系统的通讯部分可以正常工作;互联网通讯功能的设计与实现涉及到了从硬件、软件、网络技术，在32位mpu上的以太网驱动软件及协议服务软件的设计成功，不仅有助于现代设施农业测控系统的发展，还有助于嵌入式系统在信息设备中的应用。
Through study of correlative contents of advanced computer cybernetics , artificial intelligence , the domain knowledge and special crop growth mechanism in greenhouse , we present the system of multi - sensor data fusion ( msdf ) based on radial basis function network ( rbf ) to implement on line detection for nutrient - liquid , which may realize multiple components detection on - line , for example no3 - , cl - , ca2 + , ph , ec , nh4 + , k + and so on . the soft sensor ' s mechanism is introduced to overcome the limitations of sensor ' s manufacturing process . to improve the believe - degree of soft sensor ' s result , we analyze soft sensor ' s result by uncertain inferential capacity and combination rule of evidential theory 本论文通过对计算机技术、控制理论、人工智能技术和设施农业领域知识等相关理论的研究，结合对特定温室蔬菜生长的研究与机理分析，提出了一种基于rbf神经网络的营养液多传感器数据融合( msdf )系统，实现对营养液组分： no _ 3 ~ - 、 cl ~ - 、 ca ~ ( 2 + ) 、 ph 、 ec 、 nh _ 4 ~ +和k ~ +的在线检测；对于由于目前传感器制造工艺的限制而不能在线检测的离子成分如磷酸根和硫酸根，提出了一种基于径向基函数网络的软测量机制，可以有效地实现对营养液中磷酸根和硫酸根成分的实时检测；为了提高软测量结果的可信度，利用d - s证据理论的不确定推理能力和合成公式，结合领域知识对软测量结果进行可信度分析。
In the hi - tech zones , many national high and new technology industries which have decision - making power of intellectual property are developing speedly , and there come the leading industries involved in electronics information , resources economizing with high efficiency , mechanic - electronics as the whole , bio - medicine , farming with more effective faculty , etc 高新区内一批拥有自主知识产权的高新技术产业得到迅速成长，形成了电子信息、高效节能、光机电一体化、生物医药、高效设施农业等主导产业。
The research provided a theory foundation and technical sustain for the development of establishment agriculture and the standardization of building greenhouse in the country . meanwhile the research gave a new method of optimizing designing of greenhouses " structures , which completely depended on the data mining of tests 本研究为设施农业的发展和农村的温室建造的规范化提供了理论依据和技术支持，并且为温室的结构优化设计寻找了一条完全基于试验数据挖掘的新方法。
