云制造资源语义描述和服务匹配策略

针对云制造环境下资源语义描述和服务匹配问题,在充分考虑用户个性化需求与制造资源异构性的基础上,分析了云制造资源描述和服务匹配的难点,利用规范化描述的特点,将制造资源描述问题转化为Web语义描述问题,提出一种通用的制造资源语义描述框架。结合4种相似度算法,设计了阀值和权重,提出了基于过滤器的服务匹配策略。实验结果证明了该策略和算法的有效性和可行性。应用这4种相似度算法能够有效缩小匹配的规模,提高了服务的查找效率与准确度。     

大数据环境下林业资源信息云服务体系架构

为了应对林业资源信息管理在大数据时代面临的新机遇和挑战,解决智慧林业中林业资源信息服务体系架构设计与应用问题,基于云计算理论与技术,深入剖析了林业资源信息云服务的内涵及其基本特征,参照IEEE 1471 2000提出了林业资源信息云服务架构设计元模型,进而借鉴架构模式中的层架构模式设计思想,初步设计了林业资源信息云服务体系架构的总体结构和分布式协同部署模式,在国家林业局和辽宁省开展的林业资源监管服务系统构建过程中对体系架构的理论设计结果进行了实践应用和反馈修正。结果表明,林业资源信息云服务体系架构能够满足大数据环境下林业资源监管业务需求,具有良好的实用性和推广性。     

大数据环境下林业资源信息云服务体系架构——设计与实证

为了应对林业资源信息管理在大数据时代面临的新机遇和挑战,解决智慧林业中林业资源信息服务体系架构设计与应用问题,基于云计算理论与技术,深入剖析了林业资源信息云服务的内涵及其基本特征,参照IEEE 1471 2000提出了林业资源信息云服务架构设计元模型,进而借鉴架构模式中的层架构模式设计思想,初步设计了林业资源信息云服务体系架构的总体结构和分布式协同部署模式,在国家林业局和辽宁省开展的林业资源监管服务系统构建过程中对体系架构的理论设计结果进行了实践应用和反馈修正。结果表明,林业资源信息云服务体系架构能够满足大数据环境下林业资源监管业务需求,具有良好的实用性和推广性。     

宁波正广食品机械有限公司

该公司致力于食品前处理生产线的设计开发，集生产制造、市场营销、工程服务等于一体。     

神经网络自变量输入模式的视电阻率求解算法

根据瞬变电磁场理论公式中的响应和自变量之间的关系特点,提出用非线性方程模式的BP神经网络求解电阻率。通过构造单输入单输出网络结构,建立以不同时间点上的电流归一化的感应电压值为输入、视电阻率值为输出的神经网络,来拟合瞬变电磁场的二次涡流曲线。利用数值方法计算出的数据验证该训练网络的精确性,比较了不同算法对训练精度和收敛速度产生的影响。以重庆大学某处的防空洞探测实验为例验证了该算法的有效性,该算法避开具体的复杂电磁场计算或数值反问题计算,从而实现电阻率快速计算,为快速成像准备必要条件。     

基于物联网的玉米病害环境监测系统研究与实现

为研究和实现基于物联网的玉米病害环境监测系统,笔者设计了包括感知层、传输层、云服务层和应用层的4层架构。在感知层,利用传感器技术实时采集玉米病害环境的温湿度、降雨量、风向风速、光照强度和土壤温湿度等数据;在传输层中使用4G移动通信网络实现数据的远距离传输;云服务层中,基于四川农畜育种攻关云服务平台,应用数据库技术、云服务技术实现数据的存储和管理;最后,在应用层采用B/S模式实现数据展示服务。结果表明,该系统能够准确采集、稳定传输和安全存储数据,降低了人工成本。因此,它能够为玉米病害研究课题组提供有效的信息化服务,具有一定实用价值。     

基于LS-SVM逆系统的焦炉集气管压力系统内模控制

焦炉集气管压力是炼焦生产过程中重要的工艺参数,其值是否稳定,直接影响到煤气质量、焦炉寿命、焦炭质量和生产环境。针对焦炉集气管压力系统是一个强干扰、非线性和多变量耦合的复杂系统,采用LS-SVM辨识出焦炉集气管压力系统的逆系统模型,并将其串联在原系统之前,运用逆系统的方法将集气管压力系统解耦成2个相互独立的单输入单输出伪线性子系统。同时,对解耦后的系统采用非线性内模控制策略以保证系统的鲁棒性和稳定性。仿真和应用结果表明该控制策略的解耦控制效果较好,提高了系统的快速调节能力和跟踪精度,而且增强了系统的鲁棒性,可以保证焦炉集气管压力稳定在现场工艺要求的范围内。     

不同试验设计对玉米杂交组合的选择效果

为了解不同试验设计对玉米杂交组合的选择效果,对玉米杂交组合在鉴定、品比和单株试验环境下产量和株型表现进行了比较研究。结果表明:在单株种植(60 cm×60 cm)的条件下,杂交组合的产量表现与其在品比试验环境中产量的表现相关极显著,株型性状的表现也较一致,同时,很多不利的株型性状能充分地表现出来,更有利于组合的选择与淘汰。而目前采用的单行区鉴定试验环境中,杂交组合的产量表现与其在品比试验环境中的表现相关不显著。采用单株种植设计进行杂交组合的产量测验,不仅可以克服单行区鉴定试验中存在的相邻组合相互干扰的问题,而且能节省试验用地,减少人力、物力开支。     

基于需求驱动的茶叶产业互动式信息服务技术

信息服务技术是用户与信息源之间的沟通桥梁,是信息服务质量优劣的决定性因素。笔者针对茶叶产业信息服务特点,强调信息服务的需求驱动性和信息服务的互动性,以用户和市场作为检验信息服务质量的重要标准,以实现信息服务价值的最大化为目的,提出基于需求驱动的互动式信息服务模式。该模式将用户的需求作为驱动因子,并引入信息需求循环优化的互动思想,结合信息的推送和反馈机制,进一步优化信息服务机制,使信息服务更加贴近用户的实际需求。     

温室环境进化RBF网络控制模型的研究

温室环境模型是制定控制策略、优化控制方法的重要基础。采用径向基网络构建北方地区的温室环境控制模型,以温室内的温度和湿度为输出,采用进化策略(ES)优选网络中心,简化网络结构,并与OLS算法进行性能对比。试验结果表明：进化RBF网络具有更小的网络结构,并在逼近能力和泛化能力上优于OLS算法。该模型为设计北方温室环境控制方案和结构奠定了良好基础。     

Task decomposition and resources allocation of product collaboration innovative design

To deal with the complexity problems of design tasks decomposition and allocation in the process of product collaborative innovation, a task decomposition model based on mapping level function, structure and task and fuzzy search and matching collaborative partners is proposed by considering the dependencies between the design tasks and the design capacity constraints of innovative subjects. Then on the basis of studying the classification and attributes of design resource, a design resources allocation model with resource use threshold is established to compensate the lack of resource allocation by the priority strategy for design tasks, and the simulation modeling for task-resource allocation based on the time colored Petri net is carried out. Finally, a product collaborative innovation design R & D case of a certain brand phone is imported to verify the effectiveness of the proposed model.     

Efficiency of product collaborative innovation design based on the attribute and matching task

The degrees that the design agent capacity matches the design task are an important factor affecting the efficiency of collaborative product innovation design. The classification and quantitative calculation of different types of design agent capacity combination is carried out after the characteristic of design agent is analyzed. An efficiency model whose goal is the shortest entire time is constructed based on the definition of task attribute,and then the solving method of efficiency model are designed based on particle swarm optimization algorithm. The collaborative product innovation design of cabin is taken as an example to prove that considering the matching agent attribute with task can shorten the design cycle and improve design efficiency.     

Application of CAD Techniques for Design of Packaging Paper Box

CAD techniques were applied to automated design of packaging paper box such as the performance and selection of box pattern, the structure computation, the art design(including sample design, the box sample unfolding and craft drawing), input and edition of Chinese characters and foreign words, and output of the drawings. A packaging paper box system is developed to automate the packaging paper box design processes.     

B-P神经网络在作物生育动态模拟中的应用

利用B－P神经网络对作物生育动态进行模拟。在对B－P神经网络的结构和训练算法加以选择后，网络模型具有拟合精度高、收敛速度快和泛化能力强等特点。B－P网络可用于作物生育进程中单输入单输出、单输入多输出、多输入单输出和多输入多输出动态关系的模拟和作物生育动态的预测。     

Product ontology screening and its application in variant design

A product ontology screening method which can be used in variant design is proposed. With the support of complete ontology view of product resources, the product functional requirement and structural characteristics are converted to demand constraints, which are used to screen product ontology. For different screening hierarchies and objects, different screening rules such as pattern matching, case matching combined with manual decision and auto matching on the basis of case-based reasoning are adopted. The semi-automatic screening method with human-computer cooperation has impressive effectiveness on the improvements of the accuracy of design schemes and the flexibility and efficiency of design process. Finally, a variant design supporting system for building door and window is developed, which proves the feasibility and effectiveness of the method.     

Research and development of a parallel piezoelectric 4-axis force/torque sensor

This paper proposed a novel parallel piezoelectric four-axis force/torque sensor based on the bottleneck contradictions of elastic style multi-axis wrist force sensor, It introduces the sensor's structure and operating principle and discussed the selection and spatial layout of piezoelectric quartz wafer group.Then it derives the mathematic model of the sensor. The finite element model of the sensor is established, and the prototype of the sensor is manufactured. Finally, it obtains the input and output curve, voltage sensitivity, charge sensitivity and the coupling interference.The results indicate that the sensor has advantages of simple and rational structure, correct mathematic model, nice manufacturability, good linearity, good rigidity, and natural frequency greater than 30 kHz, less than 3% of the interference error without decoupling matrix.These can meet the requirements of sensor design.     

Experiment Modal Analysis System Based On GraphicCell Object

A structure input and output method of graphic cells object oriented is proposed, and input and output model based on OpenGL graphic industry standard is founded. Using the technologies of MFC and OpenGL, the input, display and dynamic output of 3D graphics are realized, which are based on graphic cells such as node, beam, triangle, quadrangle element. Graphic cells keep consistency well with the elements of finite element in the aspects of geometry, reading and writing of structure files and so on. Using the model, the functions of structure input, data gathering and analyzing, and modal vibrating shapes output etc are finished. A visual experiment modal analysis system is daeloped.     

刚性陶瓷瓦热防护系统概率设计分析方法

针对高超声速飞行器中广泛应用的陶瓷瓦热防护系统,结合有限元法和蒙特卡洛模拟建立了其概率热分析系统,提出了刚性陶瓷瓦热防护系统尺寸概率设计方法。建立了刚性陶瓷瓦热防护系统的二维有限元模型,考虑了热传导系数、比热容和表面辐射率等材料属性参数以及热防护系统各层厚度的不确定性,得到系统温度场的概率分布特性和系统热防护性能对各参数的灵敏度,并对系统的热可靠性进行了评估。算例表明：文中提出的方法对热防护系统设计过程中合理确定陶瓷瓦厚度和在保证系统性能的前提下有效减轻重量具有指导价值。     

Parameter design and simulation for animproved direct current side active power filter

Considering the characteristics of the dc side series active power filter (APF) that the output voltage cannot be adjusted and the control circuit is complex , an improved single phase dc series APF topology is proposed. The improvement of the new circuit topology and fundamental working principle are analyzed. Following the circuit power factor pre regulator principle, the designing method for the main circuit parameters is given. The voltage ring and the current ring are designed by using the zero pole method. The main circuit power switch is controlled with the same frequencies, while the control circuit was simplified further. Compared with the paralleled APF, the main circuit of topology structure is simplified and the number of the active switches is reduced, which show low input current harmonics, high power factor, large voltage output adjustment range and low cost. The simulation results prove that the proposed topology is correct and reliable.