Comparison of fuzzy AHP and fuzzy TOPSIS methods for facility location selection

Facility location selection is a multi-criteria decision problem and has a strategic importance for many companies. The conventional methods for facility location selection are inadequate for dealing with the imprecise or vague nature of linguistic assessment. To overcome this difficulty, fuzzy multi-criteria decision-making methods are proposed. The aim of this study is to use fuzzy analytic hierarchy process (AHP) and the fuzzy technique for order preference by similarity to ideal solution (TOPSIS) methods for the selection of facility location. The proposed methods have been applied to a facility location selection problem of a textile company in Turkey. After determining the criteria that affect the facility location decisions, fuzzy AHP and fuzzy TOPSIS methods are applied to the problem and results are presented. The similarities and differences of two methods are also discussed.     

Andyrchy facility for detection of cosmic rays

The Andyrchy facility was created for studying the energy spectrum and nuclear composition of primary cosmic rays in the region of a knee in the cosmic-ray spectrum. The position of this facility above the Baksan underground scintillation telescope allows simultaneous detection of electron-photon and high-energy muon components of extensive air showers. The parameters of this facility also allow it to be used for solving a number of other problems of cosmic-ray physics. Data since 1996 have been collected for several physical problems. The facility is described, and its performance characteristics are presented.     

并行环境下基于层次与特征技术的设备资源模型研究

将层次建模技术及特征建模技术有机地结合起来,对设备资源数据进行了分析与抽象,并应用面向对象技术,提出了设备资源特征的面向对象表达策略,建立了设备资源的层次模型和特征模型,为不同应用环境提供了不同层次的设备资源信息。     

Calibration of acoustic transducers using holographic interferometry

The paper describes an optical facility and holographic-interferometry techniques, as well as utilization of optical holograms for calibration of acoustic transducers for detecting emitted acoustic signals. Estimates of technical parameters and measurement accuracy are given. An approach to retrieving comparative data is suggested, and other application domains of the facility are discussed.     

A simulation-based approach for risk assessment of facility layout designs under stochastic product demands

In traditional facility layout design method, the facility layout is governed by the flow intensity between departments, which is the product flow quantity between departments. A facility layout design must maintain its efficiency over time while coping with the uncertainty in product demand. An error in the product demand assessment can render the layout inefficient with respect to material handling costs. Analytical models for the determination of the risk involved in a facility layout design are difficult to derive when the problem of size and complexity increases. This paper presents a simulation-based method for predicting the uncertainty associated with the layout. The validation of the simulation approach against analytical procedures is first detailed. The methodology for the simulation based approach is provided. Three scenarios of increasing complexity and size are also detailed. Results from case studies have shown that the procedure results in reduction of risk as high as 80%.     

Ultrasonic testing complex. Synchronization unit

The paper describes a general-purpose facility for pulsed ultrasonic measurements. Basic characteristics of the facility are given. A circuit diagram of a synchronization unit is discussed.     

基于信息模型的设备监理服务的实现

通过对设备监理现状及其发展方向的分析,提出了基于设备信息模型的设备监理服务的实现。设备信息模型是在信息集成技术的基础上,将设备的三维实体模型与设备工程的各个维度信息进行集成的N维模型。通过对设备监理目标的分析,将其分为4个维度,并基于此对设备监理服务实现过程中设备信息模型的功能进行了详细的分析。     

A facility for measuring the static characteristics of high-intensity electron beams

The operating principle of a versatile facility for measuring the static parameters of high-intensity electron beams is based on detecting transient radiation produced by ribbon-shaped and axially symmetric electron beams incident on a metal target. Schemes for detection of transient radiation are discussed, and features of the measurement procedures suitable for particular beam configurations are described. For the first time, the design of an analyzer of ribbon-shaped electron beams is presented. The usability of the facility is confirmed by experimental results and numerical calculation.     

Uncertainty analysis of the high pressure closed loop gas flow standard facility in NIM

High pressure air flow standard facilities, including the pVTt facility, sonic nozzle facility and closed loop facility were built in NIM at the end of 2014. The high pressure closed loop gas flow facility was the first closed loop facility in China. The system has 4 sets of 100 mm diameter turbine meters for the reference meters with a flow range of (40–1300) m³/h and a pressure range of (190–2500) kPa. To avoid uncertainties introduced during installation, the reference meters were designed to be calibrated in situ using the sonic nozzle facility. The uncertainty in the pressure measurement was reduced by installing an absolute pressure transducer in the manifold upstream of the reference meters, with differential pressure transducers used to measure the pressure drops across the reference flow meter and the test flow meter. The relative expanded uncertainty for the test meter can reach 0.20% (k = 2) as verified by comparison the sonic nozzle facility and the closed loop facility measurements.     

The APΓO-2 technological facility for ion-beam-assisted deposition

The APΓO-2 technological facility for ion-beam-assisted deposition is described. This facility is used to obtain composite coatings under bombardment by gas ions with energies of several tens of keV. The design features of the Penning-type ion source and the double-arm electron-beam evaporator are presented.     

制造系统设备布局的建模理论与求解方法

为提高企业对市场的敏捷反应能力及市场竞争力,在制造系统中提出了设备布局设计问题.介绍了设备布局的相关概念及不同分类标准下的布局形式,分析了各种设备布局形式的适用范围及优缺点.概括了布局设计中的优化目标及约束条件,综述了布局建模理论及其所建立的模型,并阐释了模型的求解算法.最后,探讨了目前研究中存在的一些问题,为今后的设备布局设计提供了参考.     

A simulation study of an automated sprayshop conveyor system

The paper describes the features and attributes of the CORE requirements analysis tool in a simulation environment and the associated implementation via the FORSS software package. This method is applied to the analysis of a proposed automated manufacturing facility which involves the integration of a power-and-free conveyor system into the paint sprayshop of a manual treatments facility. Practical results for the simulation model are presented.     

A Facility for Thermokinetic Studies at a Positive Pressure

A thermogravimetric facility for investigating the thermal decomposition of substances under dynamic and isothermal conditions is described. The facility is designed for thermokinetic experiments at pressures of up to 10 MPa in various gases. The distinctive features of the effect of pressure on the behavior of the thermal destruction of polymers in an inert atmosphere are analyzed using polymethylmethacrylate and polystyrene as examples.     

Calibration of current and voltage probes in the electromagnetic-pulse transmission path and near the load of the Angara-5-1 facility

The metrological support of current and voltage measurements in the transmitting path and load of the Angara-5-1 facility is described. The techniques for calibrating probes are based on the excitation of pulsed current and voltage in the calibrated units of the facility. The levels of currents and voltages are 50–100 times lower than the operating values. Comparison of the signals from the calibrated probes to the signals of reference probes helps to determine the characteristics of the calibrated probes. Cross measurements were performed to verify the techniques.     

A radiographic facility for the 70-GeV proton accelerator of the institute for high energy physics

A radiographic facility for the 70-GeV proton a ccelerator of the Institute for High Energy Physics is described. The available infrastructure in the initial straight part of the injection channel is used in the facility. The 100-mm-diameter lenses of the injection line ar e intended for transportation of the proton beam from the U-70 accelerator to the accelerating—storage complex. The facility has been designed only for an energy of 50 GeVwith a viewfield of 60 mm and used for imaging of samples with an optical density of >300 g/cm² in the presence of some losses in the line. The optical resolution of the facility is 0.25 mm. A set of experiments aimed at multiframe recording of fast processes were conducted on the facility in 2004-2008. Small-sized explosion-proof chambers, as well as the measuring system for monitoring the state of the chamber and environment, were used in the dynamic experiments.     

A robust single row facility layout problem with fuzzy random variables

The facility layout problem is the optimal arrangement of facilities in the plant area. Based on layout configurations, there are several types of the facility layout problem. The single row facility layout problem (SRFLP) is one them in which facilities have to be placed along a line. Although there are exact approaches, based on the integer programming model for solving SRFLP, a huge number of variables and constraints should be used in this model. This paper presents a new exact method to SRFLP based on a new class of variables and an extended branch and bound method (B&B). First, the SRFLP is formulated by new decision variables. To solve it, a new branching scheme for B&B algorithm is presented. Subsequently, we introduce a fuzzy robust single row facility layout problem (FRSRFLP) and solve it by a real expected value method and a fuzzy stochastic chance-constrained programming based on possibility and necessity measures together with an extended B&B method. Furthermore, the proposed methods are applied for solving some benchmark problems to show their efficiency.     

A Vacuum Photoemission Detector for X-ray Tomography on the ITER Facility

A vacuum photoemission detector designed for plasma tomography in X rays on the ITER facility is described. Such detectors allow X rays to be detected in the presence of intense neutron and -photon fluxes. The results of tests of a prototype of this detector on a ⁶⁰Co source of rays, its calibration using radiation from an X-ray tube, and tests of its serviceability on the T-10 facility are presented. The values of the valid signal and the signal-to-noise ratio are assessed for the parameters of the ITER facility. Selecting the number of detectors and their arrangement on the ITER facility to ensure the required spatial resolution of the diagnostics is considered.     

避险车道上施救设备的研发

介绍了一种用于避险车道上施救避险车辆的设备.叙述了该设备的设计原理和方法,且介绍了设备的各个部分的结构特点和功用,为同类产品的设计与制造提供了借鉴.     

A secondary beam separator: A combination of the COMBAS fragment separator with the ion catcher

The development of an experimental facility based on the high-luminosity COMBAS fragment separator and a fast ion catcher is discussed. The main characteristics of the COMBAS fragment separator and the ion catcher determining the advantages of the proposed combination are presented. The developed facility is expected to allow production of secondary radioactive beams with a quality higher than the quality of beams obtained using the in-flight separation technique. It is planned that the facility will be used in a tandem with a post-accelerator for producing single-isotope and monochromatic high-intensity secondary radioactive beams in a wide range of mass numbers A and atomic numbers Z. A list of perspective scientific problems requiring high-intensity and high-quality secondary beams of exotic nuclei is proposed.     

LDV标定装置的不确定度研究

本文介绍了 L DV(激光多普勒测速仪 )标定装置的不确定度研究。文章全面分析了该装置的各项不确定度源 ,并运用一种新方法动态确定了标定装置中主要不确定度源——校准盘的半径偏差。由此得出该装置在 95 %置信度时的相对扩展不确定度为 U95 =5 .5× 10 - 4 。