检索结果-内蒙古大学图书馆

A dISCRETE POINT SAMPLER FOR GROUNd-WATER MONITORING WELLS

GROUNd WATER MONITORING ANd REMEdIATION 1988年第3期8卷 161-164页

作者： MACphERSON, JR PANKOW, JF James R. MacPherson Jr. is a graduate research associate in the Department of Environmental Science and Engineering at the Oregon Graduate Center (19600 NW Von Neumann Dr. Beaverton OR 97006-1999). He received his B.S. in biology from the College of William and Mary in 1980 and continued there to receive his M.S. in environmental chemistry in 1982. He then worked for a consulting firm on TSCA FIFRA and RCRA projects until 1984. His research interests include vapor phase transport in the unsaturated zone sampling and analytical method development and the role of biodegradation in contaminant fate. James F. Pankow is professor and chairman of the Department of Environmental Science and Engineering at the Oregon Graduate Center (19600 NW Von Neumann Dr. Beaverton OR 97006-1999). He received his B.A. in chemistry in 1973 from the State University of New York at Binghamton and his Ph.D. in environmental engineering science from the California Institute of Technology in Pasadena California in 1979. His group is involved in the study of the physical and chemical processes affecting the behavior of organic compounds in the environment. This work includes the development and application of appropriate sampling and analysis techniques for the determination of trace organic compounds in ground water.

A discrete point sampler has been developed that overcomes disadvantages inherent in several current small-volume samplers. It is designed to obtain ground water samples after a well has been purged with a pump. It consists of a sample chamber, two ports, and a stopcock for withdrawing sample aliquots. After lowering the sampler into a well, sampling is initiated by pulling on a line that sequentially removes the plugs in the lower and the upper level ports. The sample chamber fills from the bottom port and vents air from the top port. The device is suitable for sampling for volatile organic compounds in ground waters that are not subject to spontaneous bubble degassing. The upper port is sufficiently far above the lower port that none of the water that is sampled is exposed to the vented air. The sample chamber fills in such a way that the water that is taken from the chamber for analysis is not exposed to the headspace in the chamber.

关键词：

来源：评论

学校读者我要写书评

暂无评论

OXYGEN-TRANSFER THROUGH FLEXIBLE TUBING ANd ITS EFFECTS ON GROUNd-WATER SAMPLING RESULTS

引用

GROUNd WATER MONITORING ANd REMEdIATION 1988年第3期8卷 83-89页

作者： HOLM, TR GEORGE, GK BARCELONA, MJ Thomas R. Holm is an associate chemist in the Aquatic Chemistry Section of the Illinois State Water Survey (2204 Griffith Dr. Champaign IL 61820-7495) a division of the Illinois Department of Energy and Natural Resources. His research interests include ground water geochemistry trace-metal speciation and arsenic chemistry. Prior to joining the Water Survey he was a research assistant prof essor at the University of Minnesota (Twin Cities) where he studied the geochemistry of aquifer thermal energy storage. Before that he was a postdoctoral research associate in the Water Chemistry Program of the University of Wisconsin (Madison) where he investigated arsenic speciation and cycling in fresh water sediments. He received his B.S. in chemistry from Portland State University and his M.S. and Ph.D. in environmental engineering science from the California Institute of Technology. Gregory K. George is' an assistant chemist in the Aquatic Chemistry Section of the Illinois State Water Survey (2204 Griffith Dr. Champaign IL 61820-7495). His research work has focused on evaluation and improvement of analytical methods for naturally occurring aquatic organic matter and on the development and validation of analytical and sampling methods for ground water oxidants. He was previously a research technician with the University of Illinois Institute for Environmental Studies where he determined dissolved 226Ra for a ground water treatment project. He received a B.S. in chemistry from the University of Illinois (Urbana-Champaign). Michael J. Barcelona is the head of the Aquatic Chemistry Section of the Illinois State Water Survey (2204 Griffith Dr. Champaign IL 61820-7495). His research interests include ground water geochemistry contaminant detection monitoring and verification techniques with an emphasis on ground water resource protection and management. He has been involved in various aspects of ground water research and policy matters extensively in the past eight years. He has a B.A. in chemistry from St. Mary's

A model for the diffusion of gases through polymeric tubing was derived which predicts that the amount of gas transferred is proportional to the tubing length and inversely proportional to the pumping rate. The model was experimentally tested and confirmed for oxygen transfer through fluorinated ethylene-propylene copolymer (FEP) tubing using tubing lengths and flow rates typical of ground water sampling. diffusion can introduce measurable concentrations of oxygen into initially anoxic water. diffusive loss of carbon dioxide from water that is oversaturated with respect to atmospheric CO 2 does not measurably affect ph under similar usage conditions.

关键词：

来源：评论

学校读者我要写书评

暂无评论

ROCKET MOTOR dESIGN FOR UNdERWATER SHOCK

引用

NAVAL ENGINEERS JOURNAL 1988年第3期100卷 215-225页

作者： YAGLA, JJ The authorreceived his B.A. degree in science (physics) from the Slate College of Iowa in 1965. He received his M.S. degree in engineering mechanics in 1968 and his Ph.D. in aerospace engineering and engineering science in 1981 from Arizona State University. He has done analytical and experimental research in the field of weapons blast and dynamical response since 1965 at the Naval Surface Warfare Center in Dahlgren Virginia. As a supervisory research mechanical engineer he was previously head of the Physical Response Analysis Branch Blast Effects Branch and Ship Engineering Branch. Dr. Yagla is the test development agent and was test conductor for the gun and missile structural test firings in USSIowaclass battleships. He is a consultant to the Naval Sea Systems Command battleship combat system engineer and the Naval Air Systems Command Cruise Missile Project for blast and structural response. He has been involved in the development of Standard missile and its launching systems since 1969. He participated in the design of shock tests for the Mk 104 rocket motor and analyzed the data. He is presently analyzing shock and vibration problems for the Standard Missile Program Office.

Naval ships and equipment are designed to survive underwater shock. The underwater shock can result from a nearby explosion of a bomb or missile, or the underwater detonation of a nuclear weapon. The shock wave travels through the water and applies an impulsive pressure load to the ship. The ship responds by a sudden acceleration in a direction up and away from the explosion. The motion of the ship is imparted to its weapons and equipment. In the case of Standard missile, impulsive loads are applied to the missiles stowed in the magazines. The evolutionary design of rocket motor chambers and launch shoes for Standard missile for underwater shock is traced from the early Tartar missile to the latest version of Standard missile. As the weight of the missile has increased and the performance requirements have become more demanding, the design of the weapon for underwater shock has become more difficult. The paper explains the design approaches and techniques. Theoretical and experimental methods have been required. Finally, the paper highlights the experiences and problems in conducting underwater shock experiments with production systems in ships at sea.

关键词： WARSHIPS

来源：评论

学校读者我要写书评

暂无评论

HEAT-TRANSFER STUdIES ON A ROCKET NOZZLE FOR NAVAL APPLICATION

引用

NAVAL ENGINEERS JOURNAL 1988年第1期100卷 29-35页

作者： dAS, dK MOORE, GR BOYER, CT Dr. Debendra K. Das:is assistant professor of mechanical engineering at the University of Alaska-Fairbanks. A graduate of Sambalpur University India (BS) 1972 Brown University Rhode Island (MS) 1974 and University of Rhode Island (Ph.D.) 1983 Dr. Das is a registered professional engineer in Rhode Island. He was formerly employed at the Naval Surface Weapons Center Dahlgren Virginia where he performed studies on rocket nozzles and aerodynamic heating for the Navy's missile program. Dr. Glen R. Moore:received his B.S. degree in mechanical engineering from Wichita State University in 1967 and his M.S. and Ph.D. degrees in mechanical engineering from Arizona State University in 1969 and 1971. Since 1971 he has been employed by the Naval Surface Weapons Center Dahlgren Virginia. He has been extensively involved in the analysis and testing of Navy gun and missile system launch environments and their effects on personnel equipment and ships. Dr. Moore has authored numerous reports and papers on gun blast and rocket motor plume environments. He is currently a member of the JANNAF Exhaust Plume Technology Subcommittee. Dr. Charles T. Boyer:received his B.S. M.S. and Ph.D. degrees from Virginia Polytechnic Institute and State University in 1969 1971 and 1984. He served as an intelligence officer and battery commander in the U.S. Army from 1971 until 1973 in Germany. Since 1974 he has worked at the Naval Surface Weapons Center Dahlgren Virginia. He was involved with the analysis and design of gun propelling charge assemblies and with the analysis and measurement of heat transfer from these charge assemblies to the gun bore from 1974 through 1980. Since 1980 he has analyzed and measured the heat transfer from rocket exhaust plumes to ablators used to protect ships and their equipment. He has also analyzed the in-depth heat transfer in these ablators. Currently Dr. Boyer is the project manager for the generic booster/vertical launching system compatibility test program. He has authored numerous reports and p

Heat transfer results are presented here for a rocket nozzle that uses aluminized solid propellant. The Solid Performance Computer program (SPP) was employed to calculate the two-dimensional, two-phase flow properties inside the nozzle. Utilizing the properties of particle phase obtained from this program, calculations were made for the heat flux due to particle impingement. Predictions are also presented for convective and radiative heat transfer along the nozzle surface. A comparison was made to assess the magnitudes of various modes of heat transfer. The methodology and results presented in this paper should provide useful data to designers of new rocket nozzles and should aid studies to improve the design of existing nozzles.

关键词： HEAT TRANSFER

来源：评论

学校读者我要写书评

暂无评论

SHIP EM dESIGN technology

引用

NAVAL ENGINEERS JOURNAL 1988年第3期100卷 154-165页

作者： LI, ST LOGAN, JC ROCKWAY, JW Shing Ted Li:is a project manager in the Antenna and RF Systems Integration Branch Shipboard Systems Division Naval Ocean Systems Center San Diego Calif. Majoring in electrical engineering he graduated from Taipei Institute of Technology in Taiwan in 1958. He received the M.S. degree from the University of Tennessee in 1965 and the Ph.D. degree from Georgia Institute of Technology Atlanta Ga. in 1974 both in electrical engineering. Dr. Li was employed by the Taiwan Power Company from 1958 to 1959 and again from 1961 to 1964. In the period of September 1959 to February 1961 he served as a second lieutenant in the Nationalist Chinese Army. From 1965 to 1969 he was a design engineer at the Eastern Engineering Company in Atlanta Ga. Since July 1974 he has been employed at the Naval Ocean Systems Center. His present interests include the areas of electromagnetic compatibility and advanced communication systems. Dr. Li is a member of Pi Mu Epsilon and Sigma Xi and is a registered professional engineer in Georgia. James C. Logan:is a project engineer in the Antenna and RF Systems Integration Branch Shipboard Systems Division Naval Ocean Systems Center San Diego Calif. He received the B.S. degree in 1967 and the M.S. degree in 1973 in electrical engineering from Syracuse University Syracuse N. Y. In the period 1967–1971 he served as a lieutenant in the U.S. Navy. He has been employed at the Naval Ocean Systems Center since 1973. During this period of time he has been active in the development of numerical modeling techniques applicable to Cosite HF VHF and UHF antennas. John W. Rockway:is a senior technical staff member in the Communications Department Naval Ocean Systems Center San Diego Calif. He received the B.S. and M.S. degrees in electrical engineering from Washington State University Pullman Wash in 1966 and 1968 respectively. He received the Ph.D. degree in engineering science in 1971. Currently he is employed in the Communications Department of the Naval Ocean Systems Center. His prese

This paper describes the design procedure and engineering design tools used for Navy shipboard exterior RF communication system design. The approach is an iterative process by which candidate RF system designs can be analyzed to determine their relative desirability. Several computer codes have been developed for designing the exterior RF communication systems for Navy ships. The software design aids consist of two packages, one for antenna modeling (such as the NEC-Method of Moments, NEC-Basic Scattering, and NEC-Reflector antenna codes), and another for communication systems analysis (such as dECAL, PECAL, LINCAL, and COSAM II). These codes have been well documented, validated, and applied successfully to design and integrate a number of shipboard exterior communication and topside antenna systems. However, there exist two shortcomings: (1) lack of a user friendly interface, and (2) lack of the ability to enforce design discipline and completeness. The Naval Ocean System Center recognized these shortcomings and has initiated the development of engineering workstations such as the Interactive Graphic Utility Automated for Numerical Electromagnetic Code (NEC) Analysis (IGUANA), the Numerical Electromagnetics engineering design System (NEEdS), and the Communication engineering design System (COEdS).

关键词： NAVAL VESSELS

来源：评论

学校读者我要写书评

暂无评论

CENTENNIAL BANQUET AddRESS

引用

Naval Engineers Journal 1988年第4期100卷 95-97页

作者： COSTELLO, ROBERT B. UNDER SECRETARY OF DEFENSE (ACQUISITION) Robert B. Costello was nominated by President Reagan to be Under Secretary of Defense (Acquisition) in 1987 was confirmed by the Senate and took oath of office in December 1987. Born in New Rochelle New York on June 21 1926 Dr. Costello earned his B.C.E. and M.C.E. from Rensselaer Polytechnic Institute in 1947 and 1948. He received a Ph.D. in civil engineering from Cornell University in 1951. Dr. Costello enlisted in the Navy in 1944 was recalled to active duty as an officer during the Korean War and retired from the Naval Reserve with the rank of captain in 1978. After the Korean War Dr. Costello held a number of positions in advanced research and management specializing in material science aerospace missile testing and engineering. In 1960 Dr. Costello joined the Allison Division of General Motors as Chief of Missile Engineering. Subsequently he con- ducted scientific research in deep ocean engineering and acoustic research at the Defense Research Laboratories. He holds numerous patents in deep ocean materials systems and instrumentation. Dr. Costello then returned to the Allison Division as Director Liabon for the Main Battle Tank Program. Dr. Costello was then assigned to the Delco Electronics Division where he became the Director of Materials Management. In I982 Dr. Costello was appointed the Executive Director Purchasing Activities. for the entire General Motors Corporation. He was responsible for providing new directions and implementing a broad range of new programs throughout General Motors and its suppliers worldwide. He was nominated by President Reagan to be Assbtant Secretary of Defense (Production and Logistics) in October I986 and took oath of office in March 1987. He held thb position until his current appointment.

来源：评论

学校读者我要写书评

暂无评论

ELIMINATION OF dIFFUSIONAL LIMITATIONS IN A MEMBRANE ENTRAPPEd CELL REACTOR BY PRESSURE CYCLING

引用

BIOtechnology PROGRESS 1987年第4期3卷 259-264页

作者： EFTHYMIOU, GS SHULER, ML School of Chemical Engineering Cornell University Ithaca New York 14853 George S. Efthymiou:is currently a graduate student in Chemical Engineering at Cornell University where he also obtained his M.S. degree. He obtained his B.S. degree first class in Chemical Engineering at the University of Manchester Institute of Science and Technology in England Michael L. Shuler:is a Professor of Chemical Engineering at Cornell. He received a Ph.D. from the University of Minnesota and a B.S. from the University of Notre Dame with both degrees in chemical engineering

A previous paper described the operation of an immobilized cell multimembrane bioreactor, in which production and recovery were integrated. This paper reports on a new operating procedure for the multimembrane reactor that eliminates diffusion limitations associated with the previously reported operation of the reactor. The new mode of operation increases the reactor productivity by almost an order of magnitude and also eliminates the need for periodical nutrient additions.

关键词： BIOREACTORS

来源：评论

学校读者我要写书评

暂无评论

A PRACTICAL APPLICATION OF MULTIphASE TRANSPORT-THEORY TO GROUNdWATER CONTAMINATION PROBLEMS

引用

GROUNd WATER MONITORING ANd REMEdIATION 1987年第1期7卷 84-92页

作者： HINCHEE, RE REISINGER, HJ Robert E. Hinchee Ph.D. P.E. is manager of Western Regional Engineering Operations for EA Engineering Science and Technology Inc. (41 Lafayette Circle Lafayette CA 94549). He holds a doctorate in civil and environmental engineering from Utah State University is a registered professional engineer and is a master's level certified hazardous materials manager. He is involved in subsurface hydrocarbon behavior research and practical assessment and remediation of contaminated sites. His experience includes investigation and design of remediation at more than 50 subsurface petroleum spill sites. H. James Reisinger II CHMM is a vice president of EA Engineering Science and Technology Inc. (Hunt Valley/Loveton Center 15 Loveton Circle Sparks MD 21152) and is responsible for all analytical services. He holds a master's degree from Millersville State University and is a master's level certified hazardous materials manager. He has developed sampling and analytical programs and provided analysis of the resulting data for more than 100 contaminated sites. He is currently responsible for a major laboratory that is in the EPA CLP program and certified in eight states.

Hydrocarbon transport in the subsurface environment occurs in several phases, chiefly the non-aqueous phase liquid (NAPL), dissolved and vapor phases. Mechanisms that influence transport include the physicochemical properties of the specific compounds present (density, vapor pressure, viscosity, hydrophobicity) and the physical and chemical properties of the subsurface environment, including geology, aquifer minerology and ground water hydrology. Hydrocarbon liquids are typically complex mixtures composed of numerous compounds, each with its own individual physicochemical and, therefore, transport properties. Examination of chemical data can provide insights into the transport mechanisms operating at a site: Ground water transport results in relative enrichment by more soluble, less hydrophobic hydrocarbon compounds as a function of distance from a spill; vapor phase transport typically results in relative enrichment in more volatile hydrocarbon *** sites at which subsurface fuel spills resulted in ground water contamination will illustrate the use of transport mechanism theory. At Site 1 a subsurface spill resulted in a NAPL plume approximately 150m (500 feet) and a dissolved hydrocarbon plume resulting from ground water transport of dissolved hydrocarbon approximately 350m (1150 feet) hydraulically downgradient of the source. At Site 2 there was a sudden subsurface fuel spill; ground water pumping with hydrocarbon recovery was begun within a week of spillage. Vapor phase transport resulted in contaminated ground water hydraulically upgradient of the source. In addition, there was cross-contamination at Site 2, probably as the result of contaminated water level gauging equipment, but the chemical characteristics of this contamination were sufficiently obvious to permit its identification. An understanding of transport mechanisms is instrumental in contamination assessment source identification, contaminant fate prediction and design of an appropriate reme

关键词：

来源：评论

学校读者我要写书评

暂无评论

SMALL-SIZEd WAVEGUIdES WITH PERIOdICALLY LOAdEd POSTS.

引用

Electronics and Communications in Japan, Part I: Communications (English translation of denshi Tsushin Gakkai Ronbunshi) 1987年第9期70卷 107-117页

作者： Kim, Ki-Chai Tokumaru, Shinobu Faculty of Science and Technology Keio University Yokohama Japan 223 Shinobu Tokumaru graduated from Keio University Dept. of Electrical Engineering in 1963 and received Ph.D. from Tohoku University in 1966. Presently he is a Professor of Electrical Engineering at Keio University. He has been working on antennas and electromagnetic scattering. He received an Inada Prize and an Achievement Award. He authored Getting Stronger in Electromagnetic Waves (Kodansha).

This paper considers a small-sized transmission line for energy transmission required for such applications as ICRF heating of nuclear fusion and hyperthermia where waves with coherent polarization are needed. To develop a transmission line with a small cross section, a waveguide periodically loaded with posts is proposed. Various characteristics are obtained theoretically. In the analysis, the electric fields inside the waveguide are calculated first from the current on the post. Next, the internal impedance seen from the post terminal is obtained. From this impedance and the reactance loaded externally, the determinantal equation for the phase constant is derived. The magnetic field in the waveguide is then computed.

关键词： WAVEGUIdES, RECTANGULAR

来源：评论

学校读者我要写书评

暂无评论

INTERCOMPARTMENTAL FLUId SHIFTS IN HEMOdIALYSIS-PATIENTS

引用

BIOtechnology PROGRESS 1987年第2期3卷 69-73页

作者： HEINEKEN, FG EVANS, MC KEEN, ML GOTCH, FA COBE Laboratories Inc. Lakewood Colorado Fred G. Heineken is currently Program Director for Biotechnology within the Emerging Engineering Technologies Division of the Engineering Directorate of the National Science Foundation. He received his B.Sc. degree in Chemical Engineering from Northwestern University and his Ph.D. degree in the same discipline from the University of Minnesota. His work experience includes fermentation research at Monsanto teaching and research in respiration physiology at the University of Colorado and hemodialysis product design and evaluation at COBE Laboratories. Hemodialysis Treatment and Research Center Franklin Hospital Ralph K. Davis Medical Center San Francisco California Mary C. Evans has a BS degree in Chemistry from the University of Florida. She has held positions in the artificial kidney development group at Dow Chemical Company and the new product development group of Cordis-Dow Corporation. She is currently working in clinical research in the Hemodialysis Treatment & Research Center at Franklin Hospital in San Francisco. Marcia Keen is currently a doctoral student at the University of California San Francisco and serves as Clinical Research Supervisor at the Hemodialysis Treatment & Research Center at Franklin Hospital in San Francisco. She received her MS at the University of California San Francisco. Her thesis research developed a non-invasive Doppler technique to quantitate vascular access graft flow in hemodialysis patients. Her research interests include physiologic responses to dialysis therapy manipulations. Frank Gotch is an Associate Clinical Professor of Medicine at the University of California San Francisco. He received his BA and MD from the University of California and is currently Medical Director of the Hemodialysis Treatment & Research Center at Franklin Hospital in San Francisco. His research has addressed such issues as adequacy of dialysis and mathematical modeling of hemodialysis and associated therapies. He is a past president of the American

Hemodialysis is a therapeutic procedure for replacing some functions of the natural kidney. As such, it is capable of allowing people with little or no residual kidney function to survive and in some cases to lead productive lives. There are, unfortunately, a number of side effects associated with this procedure (shock, muscle cramps, fatigue, etc.). In order to minimize these side effects, we have undertaken to model shifts of fluid between the intracellular and extracellular fluid spaces in hemodialysis patients. Fluid shifts are primarily a function of osmolality differences between these fluid spaces. Changes in osmolality are caused mainly by changes in urea and salt concentrations. Least squares analysis of patient data has been used to estimate the appropriate ultrafiltration and urea mass transfer coefficients for each patient. The model has then been used to find a dialysate sodium concentration profile that will minimize fluid shifts into and out of the intracellular fluid space.

关键词： BIOMEdICAL EQUIPMENT

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：