农产品冷链绿色物流发展的影响因素研究

在经济全球化背景下,发展农产品冷链绿色物流、控制农产品物流质量与安全成为农业做大做强的必然选择。文章从农产品物流特点出发,分析当前我国农产品冷链绿色物流发展的影响因素,探究加强农产品冷链绿色物流发展的对策。     

无公害农产品推广绿色植保技术思考

现阶段的无公害农产品数量不断增加,绿色植保技术也引起了高度的关注。绿色植保技术的实施还要收集较多的数据资料,引导农产品的发展方向,加强技术的个性化应用,以创造出更高的价值。绿色植保技术在应用的时候应站在可持续发展的角度思考,针对各类植保技术有效融合,减少单一技术应用过程中出现的问题、不足,并逐步完善技术,灵活调整绿色植保技术,以增加绿色农产品的供给。     

集成绿色防控技术,确保农产品质量安全

承德市植保植检站多年以来贯彻"绿色植保理念",从科学合理用药和提高农药利用率入手,以技术为导向,以安全为核心,以农药减量、节本增效为目标,以农作物安全、农产品安全和生态环境为宗旨,全面提高农产品质量安全水平,对不同栽培方式的露地蔬菜、水稻、马铃薯、玉米病虫害实施绿色防控新技术,为农业可持续发展保驾护航。     

我国应对绿色农产品贸易壁垒的法律对策

随着全社会环境保护意识的不断增强,绿色贸易壁垒逐渐形成并对我国农产品出口造成很大影响.本文对我国农产品出口遭受绿色贸易壁垒阻碍的形式和原因进行了分析与综合,在此基础上提出了一些建议,旨在降低绿色贸易壁垒对现行我国农业的不利影响并推动我国农业朝着可持续性的绿色农业方向发展.     

发展绿色农业经济措施探究

我国是农业大国,农业发展是我国经济建设的基础。随着我国可持续发展战略的不断推进,绿色农业也开始逐渐推行。绿色农业对改善周边环境、提高农产品安全质量等方面都有着重要作用。在目前阶段,我国绿色农业受到多方因素的制约发展缓慢。将从发展绿色农业的重要性进行阐述,主要分析绿色农业发展中存在的问题,并为促进其发展提出相关的解决措施,以供参考。     

探讨如何推广绿色农业种植技术

近年来,绿色农业种植技术受到了广泛的关注,不仅有政府部门积极倡导宣传,同时也获得了广大种植户的认可,但总体而言,现阶段我国的绿色农业规模相对较小,仍具有较大的发展空间.当下,市场对绿色农产的需求比较旺盛,积极推广绿色农业种植技术,不仅可以满足当下市场需求,提高种植户的种植收益,同时也有助于推动我国农业的可持续发展.简要...     

绿色制造——可持续发展战略的核心

简述了绿色制造的提出及其理论基础,指出经济、社会发展面临的问题,可持续发展的内涵、实施可持续发展战略是未来发展的明智选择;结论：制造业是国家的支柱产业,绿色制造是可持续发展战略的核心之一。     

基于绿色制造的虚拟企业研究

虚拟企业是为了快速响应市场变化而出现的一种企业形式,绿色制造是人类可持续发展的要求。本文分析了现今国际市场正在出现的生态化转向,提出制造业要在国际市场中竞争与生存就必须生产出符合市场需要的绿色产品。并分析了虚拟企业基于绿色制造的方法和途径即绿色设计、绿色制造工艺、面向绿色制造的材料选择、虚拟企业的绿色包装等。     

基于供应链一体化的农产品物流整合探究

农产品物流关系到大众民生,关系到农业市场的稳定与繁荣.如今,供应链一体化已成为现代农业发展的趋势,其发展能够突破农产品物流的现实困境,为农产品产供销提供一套新模式、新思路.为此,基于对农产品物流以及供应链一体化的理解,分析我国农产品物流所处的现实问题,提出相关建议.     

宋天虎：绿色制造促转型升级

环境污染问题的日益严重,给人类的生存生活带来巨大的危害,更是给当下经济发展模式提出警示。尤其是制造行业对环保问题的影响首当其冲,其转型升级走绿色发展之路已刻不容缓。＂虽然中国工业化取得了巨大进步,但必须看到,我国制造业总体上仍处于产业价值链中低端,面对新的国际贸易环境,必须适应新形势,切实加强节能环保和绿色低碳水平,不断提升产业国际竞争力。     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.     

Short-Term Relay Quality Prediction Algorithm Based on Long and Short-Term Memory

The fraction defective of semi-finished products is predicted to optimize the process of relay production lines, by which production quality and productivity ar...     

End-to-End Multiview Gesture Recognition for Autonomous Car Parking System

The use of hand gestures can be the most intuitive human-machine interaction medium.The early approaches for hand gesture recognition used device-based methods....     

Application of Feature Extraction through Convolution Neural Networks and SVM Classifier for Robust Grading of Apples

This paper proposes a novel grading method of apples,in an automated grading device that uses convolutional neural networks to extract the size,color,texture,an...     

分布动态载荷识别的抗噪处理

针对正交多项式频域法在用多种响应对矩形薄板进行载荷识别中抗噪性较差的问题,综合运用平均法、矩阵预处理和奇异值截断法等方法对之进行改善,并引入空间映射的思想,将该方法的应用范围拓展为复杂的模型.利用仿真算例,证实了该方法具有较好的抗噪性.     

基于MELTAC-N平台的核电厂安全级DCS环网研究与测试

针对工程实践中环网通讯相关问题的处理缺乏理论基础及国产化安全级DCS平台的开发缺乏成熟经验借鉴问题,对基于MELTAC-N平台核电厂安全级DCS环网的软硬件实现进行了研究。提出了安全级DCS环网双环网冗余设计、光切换开关设计等硬件设计方法,以及以RPR协议为基础,采用全数据收发策略的软件设计方法。在CPR1000安全级DCS平台上对安全级DCS环网的可靠性及实时性进行了评价,并进行了容错能力、响应时间及响应时间稳定性测试验证实验。结果表明,基于MELTAC-N平台安全级DCS环网软硬件设计具有较好的容错能力及响应时间稳定性。     

The laboratory simulation of abrasive wear

Abrasive wear has long been recognised as one of the most potentially serious tribological problems facing the operators of many types of plant and machinery; several industrial surveys have indicated that wear by abrasion can be responsible for more than 50% of unscheduled machine and plant stoppages. Locating the operating point of a tribological contact in an appropriate operational ‚map’︁ can provide a useful guide to the likely nature and origins of the surface degradation experienced in use, though care must be exercised in choosing the most suitable parameters for the axes of the plot. Laboratory testing of materials and simulations of machine contacts are carried out for a number of purposes; at one level for the very practical aims of ranking candidate materials or surface hardening treatments in order of their wear resistance, or in an attempt to predict wear lives under field conditions. More fundamentally, tests may be aimed at elucidating the essential physical mechanisms of surface damage and loss, with the longer term aim of building an analytical and predictive model of the wear process itself. In many cases, component surface damage is brought about by the ingress of hard, particulate matter into machine bearing or sealing clearances. These may be running dry although, more usually, a lubricant or service fluid is present at the interface. A number of standardised wear test geometries and procedures have been established for both two- and three-body wear situations, and these are briefly described. Although abrasive wear is often modelled as following an ‚Archard’︁ equation (i.e. a linear increase in material loss with both load and time, and an inverse dependence on specimen hardness) both industrial experience and laboratory tests of particularly lubricated contacts show that this is not always the case: increasing the hardness differential in an abrasively contaminated lubricated pair may not always reduce the rate of damage to the harder surface.     

ANGULAR DISTORTION ALLOWABLE VALUE AND ASSESS METHOD OF WELD ON COKE TOWER

A graph as the new engineering method for estimate the safety of bulging deformation of coke tower is proposed. Through stresses analysis of circumferential weld of coke tower and comparing the stresses produced by pressure with heat stress of steady state, residual stress, bending stress produced by both itself weight and wind loads, it showed that the stresses produced by pressure on the angle distortion are the main factor of equivalent stress of the combined stress. After comparing four kinds of stress controlling conditions, the relation to stress with depth of angular distortion, grade of curvature of angular distortion and half of region of angular distortion has been inferred. Graph of deformation allowable value of coke tower for different condition by angular distortion and half of region of angular distortion has been plotted. The five steps for its engineering use have been explained. The lighter the grade of curvature is, the larger of bulge allowance, may be, and the bigger of depth of angular distortion may pose too. For the coke tower with a popular structure of Dg 5 400 mm×28 mm, the result by graph is nearly more than the result of two formulas formed by other research, the error is less than 7.0%. But, the graph can be easily applied to different size of angular distortion.