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The photomultiplier test facility for the reactor neutrino oscillation experiment CHOOZ and the measurements of 250 8-in EMI9356KA B53 photomultipliers

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NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 1996年第1-2期372卷 207-221页

作者： Baldini, A Bemporad, C Caffau, E Cei, F Cristaudo, P Giannini, G Grassi, M Nicolo, D Parlati, S Pazzi, R Pieri, G Stalio, S Zhang, YM UNIV PISA IST NAZL FIS NUCLI-56100 PISAITALY SCUOLA NORMALE SUPER PISA PISAITALY UNIV TRIESTE IST NAZL FIS NUCLTRIESTEITALY UNIV TRIESTE DIPARTMENTO FISI-34127 TRIESTEITALY

We describe a LabView controlled PMT test facility developed for the CHOOZ neutrino oscillation experiment. The results relative to the measurements of 250 8-in. diameter EMI 9356KA B53 photomultipliers are presented.

关键词： neutrino oscillations Photomultipliers Reactors laboratory virtual instrumentation engineering workbenc Tea

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Risk Considerations on Developing a Continuous Crystallization System for Carbamazepine

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ORGANIC PROCESS RESEARCH & DEVELOPMENT 2017年第7期21卷 1021-1033页

作者： Yang, Xiaochuan Acevedo, David Mohammad, Adil Pavurala, Naresh Wu, Huiquan Brayton, Alex L. Shaw, Ryan A. Goldman, Mark J. He, Fan Li, Shuaili Fisher, Robert J. O'Connor, Thomas F. Cruz, Celia N. US FDA Off Pharmaceut Qual CDER 10903 New Hampshire Ave Silver Spring MD 20993 USA

Continuous manufacturing (CM) is an emerging technology in the pharmaceutical manufacturing sector, and the understanding of the impact on product quality is currently evolving. As the final purification and isolation step, crystallization has a significant impact on the final physicochemical properties of drug substance and is considered a critical process step in achieving the continuous manufacturing of drug substances. Although many publications previously focused on various innovative techniques to continuously make crystals with desired properties, engineering difficulties such as system design, automation, and integration with process analytical technology (PAT) tools have not been thoroughly discussed. Here, we focus on how to develop a continuous crystallization system, from the perspective of process engineering, and the related risk considerations on product quality. Specifically, we designed and built an automated two-stage mixed suspension mixed product removal (MSMPR) crystallization platform for a model compound (carbamazepine, CBZ) that exhibits multiple polymorphs. The crystallization process includes the integration of PAT tools (online Raman microscopy and focused beam reflectance microscopy, FBRM) for real-time monitoring. A series of case studies were done to evaluate the performance of the continuous system and PAT tools. Specifically, the drawing schemes, slurry transport, and variations on process variables are considered as the three key risk areas for continuous crystallization process development. Our proof-of-concept continuous crystallization system uses feedback/feedforward controls to achieve constant levels in crystallizers, a centralized automation prograrn coded in LabVIEW, and PAT monitoring for polymorphs and particle size distribution (Raman and FBRM). To the best of our knowledge, this is also the first study on continuous crystallization of carbamazepine for form III and its polymorphic transition (between form II and form III)

关键词： Continuous production Process engineering continuous systems Crystallization process step laboratory virtual instrumentation engineering workbenc crystallization process Case studies Carbamazepine

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Control of a Spinning Disc Reactor: An Experimental Study

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INDUSTRIAL & engineering CHEMISTRY RESEARCH 2013年第47期52卷 16832-16841页

作者： Ghiasy, Dena Tham, Ming T. Boodhoo, Kamelia V. K. Newcastle Univ Sch Chem Engn & Adv Mat Newcastle Upon Tyne NE1 7RU Tyne & Wear England

Despite abundant experimental work on intensification aspects of spinning disc reactors (SDRs), research on control characteristics of such novel devices are rather scarce. Control of SDRs may be challenging due to fast dynamics and high responsiveness of the system. However, the readily controllable rotational speed of the disc may offer an extra degree of freedom in control system design. In the present work, two test processes, namely, neutralization of HCI and NaOH and precipitation of barium sulfate, are chosen to investigate the control aspects of SDRs experimentally. The most commonly used controllers based on PI/PID algorithms implemented in LabVIEW, coupled with commercially available instrumentation, are employed to achieve the control objectives. The pH control of the neutralization process was successfully achieved using a PID controller which manipulated the flow rate of the base stream to the SDR. Addition of a disturbance observer scheme resulted in further enhancement of the control performance by suppressing the undesired effects of pH system nonlinearity. The conductivity control of the precipitation process was successfully achieved by manipulating the disc rotational speed, which presents a vastly appealing potential for adopting an innovative approach to process control for SDRs.

关键词： barium sulfate Spinning rotational speed control characteristics Velocity control SDPR gene control performance inclined plate and tube settler control systems design Flow rates pH control DISK REACTOR laboratory virtual instrumentation engineering workbenc Degree of freedom Spin

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LABVIEW-BASED MCA EMULATION SOFTWARE FOR ORTEC MULTICHANNEL BUFFERS

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MEASUREMENT SCIENCE AND TECHNOLOGY 1992年第10期3卷 959-968页

作者： ABDELAAL, RE Energy Res. Lab. Res. Inst. King Fahd Univ. of Petroleum&Minerals Dhahran Saudi Arabia

A Macintosh graphic user interface for the emulation of multi-channel analysers (MCAS) using the ORTEC range of multi-channel buffers (MCBS) is described. Developed using the instrumentation-oriented LabVIEW graphical programming environment, the emulation software employs simulated instrument controls, indicators and displays on the computer screen to depict MCA operation. This makes it simpler and easier to use than currently available software developed for other computers, which is usually command or menu driven. Following an overview of the LabVIEW environment, features included in the software for data acquisition, display, listing, storage and retrieval are described. Details are given of LabVIEW implementation with examples of software instruments developed for programming model 918A MCB. Performance data are presented and some of the problems encountered in developing the software are discussed.

关键词： computer software Computers computer programs indicators simulating system buses compensatory amounts buffers MENU Maximum credible accidents laboratory virtual instrumentation engineering workbenc MCB MULTICHANNEL

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Inertial sensing MEMS device using a floating-gate MOS transistor as transducer by means of modifying the capacitance associated to the floating gate

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MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS 2018年第6期24卷 2753-2764页

作者： Abarca-Jimenez, G. S. Mares-Carreno, J. Reyes-Barranca, M. A. Granados-Rojas, B. Mendoza-Acevedo, S. Munguia-Cervantes, J. E. Aleman-Arce, M. A. Inst Politecn Nacl Unidad Profes Interdisciplinaria Ingn Campus Hida Blvd CircuitoConcepcion 3 San Agustin Tlaxiaca 42162 Hidalgo Mexico CINVESTAV IPN Dept Elect Engn Ave Inst Politecn Nacl 2508 Mexico City 07360 DF Mexico Univ Texas Dallas Dept Mat Sci & Engn 800 W Campbell Rd Richardson TX 75080 USA Inst Politecn Nacl Ctr Nanociencias & Micro & Nanotecnol Ave Luis Enrique Erro S-N Mexico City 07738 DF Mexico

In this work, a novel application of floating gate MOS transistors is presented. An inertial sensor with an embedded FGMOS was designed, simulated and fabricated using commercially available CMOS technology, like the ON Semiconductor 0.5 A mu m, two poly, three metal, N-well, post-processed using a surface micromachining etchant to obtain a CMOS-MEMS chip, and tested. COMSOL multiphysics was used for electro-mechanical evaluation of the inertial system, PSPICE for electrical behavior analysis, Keithley instruments for electrical characterization, and Labview for data acquisition for electrical characterization. In this work, it is demonstrated that an embedded FGMOS can be used to correlate drain current either for static or dynamic inertial parameters. The presented work demonstrates the feasibility to change the coupling coefficient of the FGMOS by means of a MEMS structure, like an accelerometer, to convert displacement into an electrical signal, being suitable for integration in more complex systems.

关键词： Transistor Device Component floating gates laboratory virtual instrumentation engineering workbenc Microelectromechanical systems electrical signal Complex systems Inertial floating gate mos CMOS technology metal-oxide-semiconductor field effect transistors MEMS devices electric machines Transducers Surface micromachining Drain current

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Web-Enabled Remote Scientific Environments

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COMPUTING IN SCIENCE & engineering 2009年第3期11卷 36-46页

作者： Vargas, Hector Sanchez-Moreno, Jose Dormido, Sebastian Salzmann, Christophe Gillet, Denis Esquembre, Francisco Ecole Polytech Fed Lausanne CH-1015 Lausanne Switzerland Univ Murcia E-30001 Murcia Spain

A new approach to developing Web-enabled environments for remote diagnostics, maintenance, and experimentation in engineering is based on a middleware layer that uses a Java-Internet-Labview server to provide communication between Java programs and Labview virtual instruments. The authors illustrate their technique by applying it to the development of a complete Web-enabled application for remote control of a thermal process.

关键词： Middleware REMOTE CONTROL Remote diagnostics laboratory virtual instrumentation engineering workbenc engineering experimentation Communication Research heat treatment virtual instrument web-enabled

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LABVIEW - A SOFTWARE SYSTEM FOR DATA-ACQUISITION, DATA-ANALYSIS, AND INSTRUMENT CONTROL

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JOURNAL OF CLINICAL MONITORING 1995年第1期11卷 51-58页

作者： KALKMAN, CJ Academic Hospital University of Amsterdam Academic Medical Center

Computer-based data acquisition systems play an important role in clinical monitoring and in the development of new monitoring tools. LabVIEW (National Instruments, Austin, TX) is a data acquisition and programming environment that allows flexible acquisition and processing of analog and digital data. The main feature that distinguishes LabVIEW from other data acquisition programs is its highly modular graphical programming language, ''G,'' and a large library of mathematical and statistical functions. The advantage of graphical programming is that the code is flexible, reusable, and self-documenting. Subroutines can be saved in a library and reused without modification in other programs. This dramatically reduces development time and enables researchers to develop or modify their own programs. LabVIEW uses a large amount of processing power and computer memory, thus requiring a powerful computer. A large-screen monitor is desirable when developing larger applications. LabVIEW is excellently suited for testing new monitoring paradigms, analysis algorithms, or user interfaces. The typical LabVIEW user is the researcher who wants to develop a new monitoring technique, a set of new (derived) variables by integrating signals from several existing patient monitors, closed-loop control of a physiological variable, or a physiological simulator.

关键词： processing power DATA ACQUISITION SYSTEMS computer memory programming environments development time Libraries control ring Data Collection Methods Patient Monitoring graphical programming laboratory virtual instrumentation engineering workbenc Software systems Researchers

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Development of an educational nuclear research reactor simulator

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KERNTECHNIK 2014年第6期79卷 518-527页

作者： Arafa, A. Saleh, H. I. Ashoub, N. Atom Energy Author NCRRT EAEA Comp & Syst Engn Radiat Engn Dept Cairo Egypt NCRRT EAEA Radiat Engn Dept Atom Energy Author Cairo Egypt EAEA Atom Energy Author Nucl Res Ctr Reactor Phys Dept Cairo Egypt

This paper introduces the development of a research reactor educational simulator based on LabVIEW that allows the training of operators and studying different accident scenarios and the effects of operational parameters on the reactor behavior. Using this simulator, the trainee can test the interaction between the input parameters and the reactor activities. The LabVIEW acts as an engine implements the reactor mathematical models. In addition, it is used as a tool for implementing the animated graphical user interface. This simulator provides the training requirements for both of the reactor staff and the nuclear engineering students. Therefore, it uses dynamic animation to enhance learning and interest for a trainee on real system problems and provides better visual effects, improved communications, and higher interest levels. The benefits of conducting such projects are to develop the expertise in this field and save costs of both operators training and simulation courses.

关键词： Communication Research Reactors Engines laboratory virtual instrumentation engineering workbenc Research reactors Trainees Training Functional training interest Visual effects input parameter simulator Operators

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Phase shifting by wavelength modulation in a cube beam splitter interferometer

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APPLIED OPTICS 2017年第12期56卷 3543-3546页

作者： Rivera-Ortega, Uriel Univ Popular Autonoma Estado Puebla Strateg Planning & Technol Management Puebla 72410 PUE Mexico

A low-cost and fully automated process for phase-shifting interferometry by continuously changing the input voltage of a laser diode under the scheme of a cube beam splitter interferometer, performing as a two-window common-path interferometric setup, is presented. The input signal of a laser diode is controlled by a data acquisition device which permits a change in its wavelength according to its tunability features. The automation and data analysis is done using LabVIEW in combination with MATLAB. By using the Carre algorithm, the phase map is obtained. Measurements of visibility and phase shift to verify the phase-shifting interferometry requirements are also shown. (C) 2017 Optical Society of America

关键词： MATLAB TUNABLE Input Voltage Cube input signal beam splitters interferometers AUTOMATIC PROCESSING Automation Diode Laser laboratory virtual instrumentation engineering workbenc Phase shift Wavelength modulation

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Numerical simulation of the FDTD method in LabVIEW

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IEEE MICROWAVE MAGAZINE 2007年第6期8卷 90-+页

作者： Akrarn, Gasmelseed Jasmy, Yunus UTM Fac Elect Engn Johor Baharu Malaysia

LabVIEW (laboratory virtual Instrument engineering workbench) is a National Instruments program development. In this article, we present an FDTD code developed in Lab VIEW for basic scattering modeling. 1-D formulation with simple radiating boundary condition followed by a 2-D formulation is presented. The implementation of the PML boundary condition has been used to truncate the 2-D model used for the simulation to avoid reflections from the edges of the modeling grid. This particular formulation allows one to terminate any given material directly in the PML layers without virtually any reflection between the region of interest and the PML absorbing boundaries. The formulation uses the electric field E, the magnetic field H, and the electric displacement D rather than only the electric and magnetic fields as in usual FDTD implementation. This formulation has the advantage of making the PML properties completely independent of the background medium.

关键词： boundary-value problems computational electromagnetics electromagnetic wave scattering finite difference time-domain analysis virtual instrumentation FDTD method LabVIEW National instruments program development PML boundary condition basic scattering mod laboratory virtual instrumentation engineering workbenc Boundary conditions virtual instrument Electromagnetic wave scattering Finite difference time domain method numerical simulation Computational electromagnetics

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