洁净手术室空调控制系统设计

为了实现洁净手术室的空调系统控制,本文分析了洁净手术室空调系统要求,结合洁净手术室的空气处理系统,设计了由上位计算机、情报面板和PLC组成的三层控制网络,提出了空调机组的PLC控制策略,实现了洁净手术室空调系统控制.经调试证明,该系统能满足洁净手术室空调系统控制要求.     

手术室空调温湿度自控系统的工程实现

根据洁净手术室的系统工艺要求和空调系统结构特点,基于EBI平台实现对手术室空调温湿度自动化控制。介绍了系统硬件网络结构、手术室空调系统组成及控制功能、CARE软件编程和EBI监控平台的组态设计。实践表明,系统能满足洁净手术室空调系统控制要求,系统人机界面友好、运行稳定、可靠性高、控制灵活、功能全,具有良好的应用价值。     

基于PLC的洁净手术室净化空调自动控制系统设计

手术是医院治疗患者的主要手段之一,手术室则是医院治疗过程中的主要场所,而手术室空气质量会直接影响患者手术的康复率,其对于医院医疗水平的整体提升也十分重要。若想进一步提升医院手术室的空气洁净度,应合理利用PLC技术实现洁净手术室净化空调自动控制。在我国当前发展的大趋势下,自动控制系统的应用在洁净手术室净化空调中十分重要,可以使手术室空气环境控制更加智能化,因此,相关人员需要重视洁净手术室PLC技术的应用,并将其加以完善,通过合理使用PLC技术与智能化技术,推动了我国医院医疗行业的发展。     

洁净手术室空调系统热湿处理过程优化及能耗分析

以南京市某新建医院Ⅱ级洁净手术室为例,分别对一次回风系统、二次回风系统和新风承担全部湿负荷系统的夏季热湿处理过程进行计算与分析,结果表明:在相同设计工况下,一次回风系统能耗最大,二次回风系统在该洁净手术室空调热湿处理过程中无法实现,新风承担全部湿负荷系统能耗最小。选择新风承担全部湿负荷空调系统作为设计方案,并采用冷凝热回收技术进一步降低洁净手术室空调系统的能耗。     

医院洁净手术室空气净化系统浅析

手术室空气环境的洁净程度直接影响到手术效果,因此采用科学的方法和严格的管理措施有效控制手术室内空气中的细菌来源,对降低感染发生率是非常重要的。现以德清县人民医院手术室为例,就洁净手术室过滤器分类、空气净化系统组成、控制功能及使用维护管理进行分析探讨,并介绍了洁净手术室的沉降菌检测。     

基于PLC的洁净手术室净化空调新风机组自动控制设计与实现方法

净化空调具体是由新风机组、循环机组以及送风管道共同构成。其中,净化空调新风机组主要作用是为手术室供应新风,同时,针对室外新风予以初步净化,并在热湿处理后送入循环机组,最终经过其他两个机组加工后送入手术室。可见,以PLC为基础的洁净手术室净化空调新风机组自动控制设计是否合理便显得尤为重要。本文简要分析了净化空调系统的主要模式以及手术室空气处理的基础方法,同时,从系统整体设计以及新风机组构成两个方面分析洁净手术室净化空调新风机组自动控制的设计方式,以期为洁净手术室净化空调新风机组自动控制设计提供参考和帮助。     

基于EBI和C-Bus技术的楼宇空调自动化监控系统

根据洁净区间的空气处理系统要求和空调系统结构特点,采用工业自动化数字控制系统,实现对智能楼宇空调系统的自动化管理。介绍了EBI和C-Bus总线的空调自动化监控系统网络结构、空调系统组成及功能、现场控制网络节点硬件构成和DDC软件编程、EBI监控平台的组态设计。经工程项目调试,系统能满足洁净区间空调系统控制要求,现已投入使用,运行效果良好,达到了设计指标要求,具有良好的应用价值。     

冷冻干燥配料系统设计与制作的技术要求

通过对冷冻干燥配料工序使用的配料罐及其洁净流体物料的输送系统提出了一些设计、制造的技术要求，探索使其更加符合“GMP”要求。     

基于FPGA的数字AM调制的实现

近年来,数字AM调制技术应用越来越广泛,具体应用中多采用专用的调制芯片完成.文中介绍一种在FPGA中实现数字AM调制的方法,采用该方法设计的系统具有使用灵活、扩展性强、便于集成等优点.文中先讨论了采用Mat-lab的Simulink工具建立仿真模型进行仿真测试,然后用的FPGA芯片实现,并下载验证.经验证,系统可实现AM调幅功能.同时,该方法已应用于DDS设计中,各项性能指标均达到设计要求.     

医院净化空调系统节能技术分析

净化空调系统与暖通空调系统一样,都是一种具备特殊功能的空调系统,在医院中,高质量的净化空调系统是保证手术室洁净程度的关键所在。本文从医院净化空调系统的设计、安装和运营三个环节,对其节能技术进行了简要分析。     

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。     

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.     

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....     

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.