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Sensors & Transducers e-Digest (S&TD)
No. 3, December 2000
One-Electrode Semiconductor (OESS) Sensing Element and Sensors on its Basis
Abstract The one-electrode semiconductor (OESS) and thermocatalityc sensors on its basis are described in the article. These sensors are used for detection and and control of flammable and noxious gases in the chemical, oil and gas industry. Due to small energy consumption these sensors can be used not only in stationary but also in portable equipment designed for detection and leakage localization of various gases, estimation of dangerous concentrations, early fire alarm systems etc.
INNOVATSENSOR Enterprise, 38, Kuprevich str., Minsk, 220141, Republic of Belarus. Tel./fax: (375-17) 263 76 22. Тел.: (375-17) 207 62 87. E-mail: corwin@solo.by
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Oxygen In203-based gas sensor
Abstract The investigation results of In203 semiconductor sensor doped by iron oxide (III) for detection of oxygen concentration in gas atmosphere are presented in the report. It was proved that the investigated semiconductor sensor has high sensitivity to the change of O2 concentration in air, but at the same it is practically insensitive to the presence of methane in air.
Keywords: sensor, oxygen, In203
Authors: Yu.N. Lychkovsky and G.F. Karkotsky
Innovation enterprise «INNOVATSENSOR», 38 Kuprevich str., Minsk, 220141, Belarus Tel./fax : (375-17)263-76-22
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Practical Applications for Low-Cost Data Loggers
Abstract Data loggers are fast becoming the tools of choice among performance contractors, service technicians and engineers responsible for diagnosing and evaluating HVAC/R systems and monitoring energy efficiency and usage. These inexpensive tools are being used in many industries from federal and state energy and weatherization agencies and larger performance contracting companies to smaller service companies and independent technicians, in both residential and commercial applications. Data loggers can be effectively utilized to collect information about various building systems including heating, ventilation and refrigeration performance, energy efficiency and usage, indoor air quality, power consumption, equipment and electric light usage. This paper will examine two case studies and demonstrate how low-cost data loggers can be used as powerful diagnostic tools to establish a baseline, determine energy saving opportunities, recommend system changes and measure the results.
Outline: What is a Data Logger ? Useful Applications for Data Loggers Electric Light Usage Study Indoor Air Quality Monitoring Conclusion Biography
Authors: Hugh J. Flye, Product Application Specialist Gregg M. Daly, Sales Manager
Onset Computer Corporation 470 MacArthur Blvd. Bourne, MA 02532 1-800-564-4377 Web Site: www.onsetcomp.com
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Analysis of Multi-Channel Control Signals for Micro Air Vehicles (MAV's) Using MVAR Model
Abstract The paper considers the multi-channel remote control signals processing required for hovering flight required for the Micro Air Vehicles (MAVs). The multi-variable time series analysis approach is applied to modeling and simulation of the four-channel man-manipulated signals to control the MAV hovering flight. Different multi-variable autoregressive (MVAR) models are identified using the multi-channel remote control signals sampled from the MAV remote controller. The final prediction error (FPE) related to each MVAR model is detailed. The results demonstrate that two variables with the flap and the elevator play a critical role in controlling MAV hovering flight and the other two variables with the thruster and the rudder may be kept the line.
Key Words: MAV; flight control; modeling; simulation; AR model
Authors: Huaiyu Wu, Zhaoying Zhou, Shenshu Xiong, Xiaohao Wang
Department of Precision Instruments & Metrology, Tsinghua University, Beijing 100084, P.R. China E-mail: wuhy@post.pim.tsinghua.edu.cn
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A new book in constrained global optimization and multiple criteria decision making
Global Optimization with Non-Convex Constraints: Sequential and Parallel Algorithms by Roman G. Strongin, Nizhni Novgorod State University, Russia Yaroslav, Yaroslav D. Sergeyev, Institute of Systems Analysis and Information Technology of the CNR,c/o University of Calabria, Italy and Nizhni Novgorod State University, Russia
E-mail :
yaro@si.deis.unical.it
NONCONVEX OPTIMIZATION AND ITS
APPLICATIONS
This book presents a new approach to global non-convex constrained optimization. Problem dimensionality is reduced via space-filling curves. To economize the search, constraint is accounted separately (penalties are not employed). The multicriteria case is also considered. All techniques are generalized for (non-redundant) execution on multiprocessor systems.
Audience: Researchers and students working in optimization, applied mathematics, and computer science.
Kluwer Academic Publishers, Dordrecht
Marry Christmas and Happy New Year ! Happy New Millennium !
With best regards, S&TD Editor
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