渔船节能减排问题研究

国家在发展经济的过程中把节能减排作为重要目标,其也是经济产业实现现代化发展目标的主要标志。国家在推进节能减排计划的同时把渔船节能减排作为主要内容。主要是由于我国在渔船发展方面形成的问题异常严峻,极大程度影响了渔业的可持续发展。近些年来,渔业管理部门以及社会各界都在努力贯彻落实渔船节能减排工作,并且积极寻求新的节能减排技术,希望可以解决渔船高能耗、高污染的一系列问题。首先梳理了节能减排的意义,其次全面讨论了我国渔船节能工作现状,基于此。提出了我国渔船节能减排的对策。     

余热利用助力设备节能改造

国务院在“十一五”规划纲要中首次提出“节能减排”,称其为推进经济结构调整,转变增长方式的必由之路。其后,国家发改委会同有关部门制定的《节能减排综合性工作方案》进一步明确了实现节能减排的目标和总体要求。     

一种节能减排的螺杆主机

空压机的节能减排是一个不可分割的整体概念,完美的空压机应该是节能减排空压机.空压机减排,说到底就是减重量,降噪声.它需要专有技术. 众所周知,钢铁的生产过程同时也是一个三废(废气、废水和固体废弃物)排放过程.减少空压机的钢材消耗就是等于减少三废的排放.如果说空压机的节能取决于其机组比功率,那么空压机的减排取决于其机组重量和噪声.     

温家宝主持召开国务院节能减排工作领导小组会议明确节能减排工作重点

7月1日上午,国务院总理、国务院节能减排工作领导小组组长温家宝主持召开节能减排工作领导小组会议,听取2007年节能减排工作进展情况汇报,安排2008年节能减排工作。     

2014年～2015年节能减排科技专项行动方案主要内容

<正>为进一步贯彻落实国务院《节能减排"十二五"规划》和《"十二五"节能减排综合性工作方案》的部署,全面推进节能减排科技工作,科技部、工业和信息化部组织制定了《2014~2015年节能减排科技专项行动方案》,其主要内容如下:(1)主要目标将实现突破共性和关键技术150项,相关关键设备能效提高10%以上,制修订国家或行业技术标准100项;在重点行业组织推广先进适用技术300项,实施节能减排重大技术示范工程100项,应用普及率提高30%;建设20个     

四象限变频技术应用于煤矿卡轨车上的效益分析

我国煤矿设备运行普遍存在能耗高、效率低的问题,是国家实施节能减排的重点单位,卡轨车作为煤矿辅助运输的主力军,其节能减排的核心是推广应用变频节能新技术。阐述了我国卡轨车的应用现状,研究分析了四象限变频技术应用于卡轨车的效益计算,希望能为我国煤矿节能减排提供理论参考。     

Research on the Energy Saving Technology Evaluation System of Typical Manufacturing Processes

从典型制造工艺节能减排的角度出发,研究节能减排技术的评价指标,提出综合评价计算方法,建立典型制造工艺节能减排技术评价体系,为中小企业开展节能减排项目提供参考依据.     

典型制造工艺节能减排技术评价体系研究

从典型制造工艺节能减排的角度出发,研究节能减排技术的评价指标,提出综合评价计算方法,建立典型制造工艺节能减排技术评价体系,为中小企业开展节能减排项目提供参考依据。     

节能减排基础常识

节能减排的形势社会当前,实现节能减排目标面临的形势十分严峻。2006年以来,全国上下加强了节能减排工作,国务院发布了加强节能工作的决定,制定了促进节能减排的一系     

流体机械节能减排现状、任务和对策

介绍了我国流体机械的能源消费现状,节能减排进展,面临的节能减排严峻挑战和艰巨的任务,通过对水泵、风机和压缩机能源利用的研究,分析了流体机械的节能减排潜力,提出了针对性的节能减排建议.     

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.