酸再生塔气液相塔壁腐蚀速率的对比研究

主要研究氢氟酸再生塔使用多年以后，根据气相和液相部位的壁厚对比试验，金相组织分析，扫描电镜分析以及能谱分析，评定了蒙乃尔合金在酸再生塔中低部液相部位和顶部气相部位的腐蚀性能。通过蒙乃尔合金在酸再生塔气相和液相中的腐蚀速率对比，结果表明蒙乃尔合金在液相部位的腐蚀速率比气相部位明显增大。     

大型工业化制备液相色谱分离装备及其应用简介

结合公司新研制的产品-DAC800大型工业化高压制备液相色谱分离纯化装备，概述了大型工业化制备液相色谱分离纯化装备的基本构成，并探讨了大型工业化制各液相色谱装备应用的要点。     

色谱质谱联用技术

在色谱质谱联用技术中，气相色谱与质谱的联用和液相色谱与质谱的联用是应用最广泛的在线联用技术。本书分为两部分。第一部分主要介绍了气相色谱质谱联用技术的基本原理，气相色谱与质谱联用仪器以及操作要点，数据采集与处理，谱库检索和典型应用示例。第二部分主要介绍了液相色谱质谱联用技术的原理、方法、技术及最新的发展，并结合具体实例进行讨论，同时介绍了ESI、APCI的原理及相关的接口技术。     

聚焦型微通道内气泡生成特性数值模拟

微气泡因具有比表面积小和稳定性好等特点被广泛应用于污水处理和矿物浮选等领域。为了高效获得稳定的微气泡,利用COMSOL软件研究了聚焦型微通道中气、液相流速、表面张力、液相黏度和壁面润湿性对气泡生成的影响。结果表明：当气相流速增加时,气相克服表面张力的能力增强,气泡的脱离尺寸和频率增大,脱离时间减小;液相流速增加时作用在微气泡上的惯性力和剪切力增大,气泡脱离时间和脱离尺寸均减小;表面张力增大时气泡脱离时间和脱离尺寸增大,脱离频率减小;液相黏度增大时,作用于气泡的黏性力随之增大,气泡的脱离时间和脱离直径均随之减小,脱离频率增大;接触角从40°增大到180°,气泡的脱离尺寸和脱离时间整体先增大后减小,脱离频率先减小后增大。     

甲基汞分析方法比对及甲基汞标准样品的研制

对甲基汞的4种分析方法(气相色谱法，液相色谱法，冷原子吸收光谱，毛细管电泳法)，进行了比对讨论，应用表明，气相色谱法效果较好。研制了甲基汞标推样品，测试结果表明，样品性能能满足实际应用的需要。     

一种能够用于气相和液相检测的双道石英晶体传感器

报导了一种能够用于气相和液相检测的双道石英晶体传感器，介绍了传感器的工作原理、硬件结构和软件设计，给出了有关的实验结果。     

气相沉积TiN和Ti（C,N）镀层的抗氧化性能

研究了气相沉积ＴｉＮ和Ｔｉ（Ｃ，Ｎ）镀层的抗氧化性能，通过ＳＥＭ观察和ＸＲＤ相分析，研究分析了氧化腐蚀产物类型，探讨了膜基体系失效机制。结果表明，气相沉积层的抗氧化性能明显优于无镀层的３Ｃｒ２Ｗ８Ｖ试样，尤以ＰＣＶＤ ＴｉＮ性能最佳，氧化产物为金红石型ＴｉＯ２。     

封堵井水泥石在CO2湿相环境下的腐蚀规律研究

为探讨不同湿相环境对油井水泥石在CO₂埋存条件下腐蚀的影响机理和规律，采用了试样表观分析、扫描电镜(SEM)、能谱仪(EDS)和物理分析等方法，测定了两种不同配比的水泥石在超临界CO₂气相和液相环境下的表观特征、腐蚀深度、抗压强度、渗透性、微观形貌等变化，并对比分析了气相CO₂和液相CO₂两种暴露条件下对水泥石腐蚀过程的影响。结果发现，水泥石在腐蚀过程中由外向内出现了淋滤脱钙层、碳化层、氢氧化钙溶解层和未腐蚀层等4个区域；两种水泥石在处于超临界CO₂的两相状态下，随着暴露时间的延长，其抗压强度显著下降，腐蚀深度、渗透率、孔隙结构都有不同程度的增加，且在液相CO₂环境下水泥石试样腐蚀更为严重；液相CO₂环境下高矿化度地层水的协同作用会增加CaCO₃的溶解度，增强浸出效果，加剧了CO₂对水泥的侵蚀。从而揭示了湿相环境对油井水泥石在二氧化碳埋存条件下耐久性能影响机理和规律，并为油井水泥腐蚀提供了参...     

仪器分析技术在油品分析中的应用

综述了气相色谱、高效液相色谱、近红外光谱、质谱、核磁共振以及全二维气相色谱、气相色谱 -原子发射光谱联用、棒状薄层色谱 -氢火焰离子化检测器联用、气相色谱 -质谱联用等仪器分析技术在油品分析中的应用 ,引用参考文献 5 2篇     

磁场复合电解加工流场分布特性的数值模拟

采用欧拉-欧拉多流体方法,对磁场复合电解加工的气液两相流进行了数值模拟,研究磁场作用下电解质流场流速、气泡体积分数分布等流体力学信息.仿真表明,静液状态时,在磁场的作用下,液相产生了流速,流速呈环状分布,气相呈搅拌状分布.入口添加流速后,在低流速下,液相速度仍呈环状分布,气相呈搅拌状分布;在较高流速下,液相和气相的分布与无磁场时的分布相近.     

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.     

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.