中国农业综合开发之路——反思篇

政府有组织、大规模的实施以改造中低产田、增加粮食产量为主要目标的农业综合开发,是从1988年开始的,如今已走进第20个年头了.近20年来,农业综合开发不断发展,取得了显著的综合效益,走上了一条蓬勃发展之路.进入新的时期,农业综合开发如何与时俱进,为建设全面小康社会作出新的贡献,是每个从事于农业综合开发工作的同志值得思考的课题.本文分三篇,从回顾中国农业综合开发所走的道路,反思农业综合开发的制度设计与政策效应,并提出今后一段时期的农业综合开发的初步设想,旨在推动农业综合开发的探讨与研究工作.     

中国农业综合开发之路——回顾篇

政府有组织、大规模的实施以改造中低产田、增加粮食产量为主要目标的农业综合开发,是从1988年开始的,如今已走进第20个年头了.近20年来,农业综合开发不断发展,取得了显著的综合效益,走上了一条蓬勃发展之路.进入新的时期,农业综合开发如何与时俱进,为建设全面小康社会作出新的贡献,是每个从事于农业综合开发工作的同志值得思考的课题.本文分三篇,从回顾中国农业综合开发所走的道路,反思农业综合开发的制度设计与政策效应,并提出今后一段时期的农业综合开发的初步设想,旨在推动农业综合开发的探讨与研究工作.     

新时期我国农业综合开发的政策着力点

农业综合开发是中国农业发展的一项战略性政策措施,当前处于发展的第三个阶段。该阶段,农业综合开发在指导思想上发生战略性转变,明确了全国三类区域的划分及政策目标定位,近年对若干重要政策进行了调整。面向未来新的时期,农业综合开发的政策着力点应优先考虑八大领域。一、引言农业综合开发是指中央政府为保护、支持农业发展,改善农业生产基本条件,优化农业和农村经济     

创新三大机制，促进农业综合开发

随着国际国内政治经济形势的发展变化.农业综合开发工作面临着一系列新的情况、新的形势、新的矛盾、新的挑战和新的机遇.苍溪县结合县域实际,进一步完善和创新农业综合开发的立项投入、规范管理和健康运行三大机制.逐步形成了"政府引导、农民主体、社会参与、高效共赢"的科学开发机制,解决了农业综合开发工作诸多难点问题.推动了农业综合开发事业健康发展.     

新田县农业综合开发成功经验

新田县通过20年的农业综合开发，实行山、水、田、林、路综合治理。以提高农业综合生产能力、增强农业发展后劲、增加农民收入为目标。全县农业综合开发取得了明显的经济效益、社会效益和生态效益。     

学习贯彻十七大精神推动农业综合开发事业又好又快发展

农业综合开发作为政府支持农业、农村发展的重要政策措施,具有很强的基础性、公益性、示范性和带动性作用.科学发展观为农业综合开发指明了新方向,和谐社会建设为农业综合开发搭建了新平台,改革开放为农业综合开发增添了新动力.在新的历史发展阶段,农业综合开发要在扶持主导产业、特色产业基地建设,推进产业化经营,推进科技进步,着力机制创新等方面有新的作为,实现又好又快发展.     

瞄准问题，突出实践，力推农业综合开发科学发展

当前,全球金融危机对我国农业发展的冲击,深刻变化的国际环境,艰巨繁重的发展任务,复杂多样的社会矛盾对农业综合开发工作提出了新的要求.面对新的形势和任务,如何实现农业综合开发沿着正确方向科学发展,对此,城步苗族自治县农业综合开发办联系实际,紧抓这一历史机遇,努力实现农业综合开发科学跨越.     

实施农业综合开发，促进旅游农业发展

农业综合开发是国家支持和保护农业的重要举措,是发展农村生产力的有效途径,是提高农业综合生产能力、保证粮食安全和促进农民增收的关键措施.山东省海阳市立足资源和区域优势,将农业综合开发土地治理项目与旅游农业的规划、建设密切结合,强化措施,整合资金,加强管护.确保了农业综合开发土地治理项目和旅游农业高标准建设.发挥了农业综合效益,走出了一条以农业综合开发促进旅游农业发展的新路子.     

综合开发打基础现代农业促增收

近年来,沛县农业资源开发局在县委、县政的正确领导下,紧紧围绕加快现代农业发展这一核心目标,以新理念、新思路、新举措,突出规模开发、产业开发、多元开发、科技开发,全力做好农业综合开发文章.三年来,综合开发卓有成效地改善了农业生产条件,提高了农业综合生产能力,增加了农民收入,使农村面貌大有改观.     

强力推进农业开发，有效实现农企“双赢”

近几年来,祁阳县积极利用农业综合开发惠农助农政策.以实施产业化经营项目为契机,以发展优质稻这一支柱产业为主攻方向,将推进农业产业化与加强农业基础设施建设有机结合起来.走出了一条农业综合开发扶大扶强龙头企业,龙头企业带动支柱产业发展和农民持续增收,最终实现农企互动"双赢"的路子.     

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.     

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。     

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....     

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.     

Limits of topographic measurement by the scanning tunnelling and atomic force microscopes

Parameters describing the topographic character of a surface (height, surface wavelength, slope and curvature) can be derived from equivalent sinusoidal profiles. The response of a surface-measuring instrument may be modelled in terms of instrument parameters such as stylus radius, and scanning range and resolution. The performance of the instrument may then be mapped as a zone in amplitude-wavelength (AW) space to show the sinusoidal profiles it is capable of measuring. In a first-order analysis the STM and AFM are considered as equivalent to contact-stylus instruments with a notional stylus radius equal to the tip radius plus the gap. Comparisons between different instruments and types of instrument are readily made by mapping in AW space. The error arising from convolution of the sinusoidal profile with that of the finite tip may be quantified and plotted as contours in AW space.