检索结果-内蒙古大学图书馆

surface Water Wave Topography Construction using Free surface synthetic schlieren Method for Demonstration of Ripple Tank Wave Phenomena

引用

Journal of Physics: Conference series 2018年第1期1144卷

作者： s Yapo E seesomboon N Chattrapiban N Pussadee Master's Degree Program in Teaching Physics Faculty of Science Chiang Mai University Chiang Mai 50200 Thailand Department of Mechanical Engineering Faculty of Engineering Chiang Mai University Chiang Mai 50200 Thailand Department of Physics and Materials Science Chiang Mai University Chiang Mai 50200 Thailand Thailand Center of Excellence in Physics Commission on Higher Education 328 Si Ayutthaya Road Bangkok 10400 Thailand Research Center in Physics and Astronomy Faculty of Science Chiang Mai University Chiang Mai 50200 Thailand

The ripple tank is a popular water wave phenomena demonstration tool for secondary school students. The projected wave images are observed in bright - dark patterns on a screen. This tool, however, falls short in presenting the amplitude of the waves which is another important parameter in explaining the wave phenomena. The free surface synthetic schlieren (Fs-ss) method presents an immense technical tool for solving this problem. Fs-ss is an optical method based on light refraction in determining the surface gradient field from the motion of a random dot pattern when the water surface is perturbed. The surface height of the wave is constructed using the inverse gradient operation on the displacement gradient field of the random dot pattern. In this work, Wave propagation, reflection, diffraction, and interference pattern surface construction were performed to visualize wave phenomena in 3D.

关键词：

来源：评论

学校读者我要写书评

暂无评论

COMMUNICATIONs AND YOU

引用

Naval Engineers Journal 1967年第1期79卷 33-37页

作者： WILsON, THOMAs B. U.S. NAVY COMMANDER THOMAS B. WILSON JR. U.S. NAVY has served in the U.S. Navy since 1942 starting as an enlisted man in the Destroyer Forces Atlantic Fleet prior to entry into the U.S. Naval Academy in 1944. He graduated in 1948 and served in the Amphibious Forces U.S. Pacific Fleet on attack troop transports until 1951 when he entered the Navy's Postgraduate Training Program. Concurrently in 1953. he received a Master of Science Degree in Naval Architecture from Webb Institute of Naval Architecture and entered the ranks of the “Engineering Duty Officers” assigned to the Naval Ship Systems Command (formerly the Bureau of Ships) Department of the Navy. He has served on the waterfront in Naval Shipyards in supervisory positions on new construction conversion repair and dry-docking of ships ranging from minesweepers to attack aircraft carriers. Other duty includes tours in Supervisor of Shipbuilding Jacksonville Florida the Material Section of Mine Forces Pacific Fleet the Engineering Department of the U.S.S. RANDOLPH (CVS 15) Project Coordinator for Aircraft Carrier Design in the Bureau of Ships and Industrial Officer of the David Taylor Model Basin. He is currently the Fleet Maintenance Officer on the Staff Commander in Chief U.S. Naval Forces Europe.

来源：评论

学校读者我要写书评

暂无评论

THE MARITIME DILEMMA

引用

Naval Engineers Journal 1970年第6期82卷 41-48页

作者： JOLLIFF, JAMEs V. THE AUTHOR graduated from the Naval Academy in 1954. Following graduation he served aboard USS SAMUEL N. MOORE (DD-747) as Engineering Officer and USS CIMARRON (AO 22) as First Lieutenant and Gunnery Officer. After a short tour as Ship Superintendent Long Beach Shipyard he attended Webb Institute of Naval Architecture for three years while studying Naval Construction and Engineering. After receipt of a Master of Science in Naval Architecture degree he was designated an Engineering Duty Officer (EDO) and assigned to duty at the Long Beach Naval Shipyard. While there he served in billets of Assistant Repair Superintendent and Assistant Planning and Estimating Superintendent and as such was primarily concerned with the repair and conversion of U. S. naval surface ships. After two years at Long Beach he was ordered to duty as Staff Maintenance Officer Commander Mine Force U. S. Pacific Fleet. He then served as an instructor in the Engineering Department of the U. S. Naval Academy during which time he was awarded an M. S. in Financial Management from George Washington University. He is currently studying in a PhD program at Catholic University Washington D. C.

来源：评论

学校读者我要写书评

暂无评论

THE OCEAN—AN ENGINEER's CHALLENGE

引用

Naval Engineers Journal 1971年第5期83卷 61-75页

作者： JOLLIFF, JAMEs V. USN The authorgraduated from the Naval Academy in 1954. Following graduation he served aboard USS SAMUEL N. MOORE (DD-T4T) as Engineering Officer and USS CIMARRON (AO 22) as First Lieutenant and Gunnery Officer. After a short tour as Ship Superintendent Long Beach Shipyard he attended Webb Institute of Naval Architecture for three years while studying Naval Construction and Engineering. After receipt of a Master of Science in Naval Architecture degree he was designated an Engineering Duty Officer (EDO) and assigned to duty at the Long Beach Naval Shipyard. While there he served in billets of Assistant Repair Superintendent and Assistant Planning and Estimating Superintendent and as such was primarily concerned with the repair and conversion of U. S. naval surface ships. After two years at Long Beach he was ordered to duty as Staff Maintenance Officer Commander Mine Force U. S. Pacific Fleet. He then served as an instructor in the Engineering Department of the U. S. Naval Academy during which time he was awarded an M. S. in Financial Management from George Washington University. He is currently studying in a PhD program at Catholic University Washington D. C.

It has been said that the primary goal of the ocean engineer is to understand the nature of the ocean and to make use of this understanding through his engineering skill for the benefit of mankind. Perhaps these goals can be said to consist of the following pursuits: The scientific study of the world ocean by gathering and analyzing data relating to the ocean, its lithospheric and atmospheric interfaces, and their interrelationships. The development of basic technology for furthering man's extension into the ocean technologies, for example, relating to structures and materials, hydrodynamic shapes, life support systems and sensor phenomena. specific task accomplishments such as coring the ocean floor, recovering ocean minerals, extending man himself into the sea and countering corrosion. Utilization of the ocean and its resources for purposes of desalinization, weather and climate forecasting, liquid storage, mineral extraction, recreational park development, aquaculture, advanced commercial fishery development, undersea warfare, and proper waste disposal. In fact, there is very little that is done on the continents today, that we should not seek to do in the oceans in the future. © 1971 American society of Naval Engineers

关键词：

来源：评论

学校读者我要写书评

暂无评论

HIGH-sPEED VELOCITY LOG

引用

NAVAL ENGINEERs JOURNAL 1982年第4期94卷 43-48页

作者： BARNETT, NJ CHENEY, sH Neal J. Barnett:holds a Bachelor of Mechanical Engineering degree from the City College of New York February 1967 and a Master of Science degree in Applied Mechanics from the Polytechnical Institute of Brooklyn May 1972. He is a member of Tau Beta Pi the National Engineering Honor Society Pi Tau Sigma the National Mechanical Engineering Honor Fraternity and the ASME the American Society of Mechanical Engineers. Mr. Barnett has been a civilian employee of the Navy Department since 1967 and is currently employed as a navigation systems engineer at the Naval Air Development Center Warminster Pa. For the past nine years Mr. Barnett has specialized in and has been technically responsible for the development of ship and submarine speed sensors for U.S. Navy Fleet applications. Samuel H. Cheney:holds a Bachelor of Science in Electrical Engineering degree from Drexel University Philadelphia Pa. June 1974 where he specialized in electronics and communications. He is a member of the Institute of Electrical and Electronics Engineers (IEEE). Mr. Cheney is currently employed as an Electronics Engineer at the Naval Air Development Center (NAVAIRDEVCEN) Warminster Pa. where he is currently assigned as Project Engineer for the High Speed Velocity Log Program prior to coming to NAVAIRDEVCEN in September 1977 he was employed by the Department of the Army Frankford Arsenal where he was involved in development of electronic fire control systems.

Advanced high speed ships (surface effect ships, hydrofoils and air cushioned vehicles) under development will operate at speeds which are considerably higher than conventionally hulled ships. Precise velocity sensing and measuring techniques that provide the required accuracy throughout their operating speed range do not currently exist. This paper will discuss the Navy's development of a High speed Velocity Log (HsVL), which will provide self contained, two-axis velocity measurement for these advanced high speed hulls. The system selected by the Navy for an exploratory development program uses microwave doppler radar technology. The paper will discuss reasons why an FM-CW doppler radar technique was chosen over other candidate technologies. The doppler radar technique involves the transmission of narrow beam radar signals down toward the water surface. Frequency of backscattered energy from the water surface is compared with the frequency of transmission to determine the “doppler” frequency shift from which ship's velocity relative to the water surface is computed. The paper will present test results of the HsVL feasibility model aboard the hydrofoil Uss High Point (PCH-1) and aboard the Amphibious Assault Landing Craft Jeff (B). In addition, a summary of an intensive analysis phase to determine HsVL critical design parameters will be described.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Green synthesis of NiO nanoparticles using a Cd hyperaccumulator (Lactuca sativa L.) and its application as a Pb(II) and Cu(II) adsorbent

引用

Environmental Nanotechnology, Monitoring and Management 2024年 21卷

作者： Hamdan, Abd Mujahid sardi, Arif Reksamunandar, Rhyan Prayuddy Maulida, Zahratul Arsa, Dwi Ardiana Lubis, syafrina sari Nisah, Khairun Department of Enginering Physics Faculty of Science and Technology UIN Ar-Raniry Banda Aceh Jln. Syekh Abdurrauf No 1 Darussalam Banda Aceh 23111 Indonesia Department of Biology Faculty of Science and Technology UIN Ar-Raniry Banda Aceh Jln. Syekh Abdurrauf No 1 Darussalam Banda Aceh 23111 Indonesia Department of Madrasah Ibtidaiyah Teacher Education Faculty of Tarbiyah and Teacher Training Jl. Dr. S. H. Sarundajang Ringroad I Sulawesi Utara Manado 95128 Indonesia Postgraduate Program Master of Environmental Management Syiah Kuala University Jln. Tgk. Chik Pante Kulu Banda Aceh Darussalam 23111 Indonesia Department of Environmental Engineering Faculty of Science and Technology UIN Ar-Raniry Banda Aceh Jln. Syekh Abdurrauf No 1 Darussalam Banda Aceh 23111 Indonesia Department of Chemistry Faculty of Science and Technology UIN Ar-Raniry Banda Aceh Jln. Syekh Abdurrauf No 1 Darussalam Banda Aceh 23111 Indonesia

The proliferation of heavy metal contamination, namely, lead and copper, has emerged as a pervasive worldwide peril to human existence. One potential solution for addressing this issue is the utilization of nanoparticle adsorption, specifically for nickel oxide nanoparticles. However, to promote environmental sustainability, scholarly studies have identified green synthesis as a prospective methodology. The process of cadmium phytoremediation, although offering a potential remedy for heavy metal contamination, gives rise to apprehensions surrounding the proper disposal of cadmium hyperaccumulator plant biomass. Hence, it is imperative to establish suitable strategies for the disposition or usage of this biomass. The utilization of hyperaccumulator extracts for the eco-friendly production of nickel oxide nanoparticles remains unexplored in the current literature. The main aim of this research is to explore the possible application of Lactuca sativa L. as a plant species with the ability to accumulate high levels of cadmium. The study also seeks to examine the efficacy of utilizing these plants in the fabrication of nickel oxide nanoparticles and evaluate their capacity to absorb lead and copper ions. The characterization of nickel oxide nanoparticles is conducted through a range of techniques, encompassing scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction, X-ray fluorescence, Fourier transform infrared spectroscopy, transmission electron microscopy, Brunauer-Emmett-Teller spectroscopy, and vibrating sample magnetometry. The present work achieved successful utilization of Lactuca sativa L. extract for the manufacture of nickel oxide nanoparticles, which showed notable efficacy as an adsorbent for lead and copper. The synthesis of nickel oxide nanoparticles using an extract from Lactuca sativa L. has demonstrated the viability of utilizing hyperaccumulator biomass in the phytoremediation of cadmium. This finding presents a promising

关键词： Green synthesis Lactuca sativa L. Nanoparticle Nickel oxide Phytoremediation

来源：评论

学校读者我要写书评

暂无评论

MILITARY sIGNIFICANCE OF DEEP DIVING VEHICLEs

引用

Naval Engineers Journal 1963年第2期75卷 365-374页

作者： JACKsON, LAURENCE L. The author was commissioned in the U. S. Navy 6 June 1945 upon being graduated from the U. S. Naval Academy Annapolis Maryland. He served in various submarines until June 1951 when he was ordered to V. S. Naval Postgraduate School Monterey California. From there in 1954 having been awarded a Master of Science Degree Naval Engineering (Electrical) he reported for duty on a submarine then on a submarine squadron staff. In 1957 he began a three-year tour at Pearl Harbor Naval Shipyard. It was during this tour that he was selected to be an Engineering Duty Officer. From 1960 to 1962 Commander Jackson served at David Taylor Model Basin specializing in submarine RDT and E programs. During this tour he was awarded the Secretary of the Navy Commendation for Special Achievement. At present Commander Jackson is in the Ship Design Division of the Bureau of Ships serving as Submarine Program Officer for Hull Design. Commander Jackson is a member of the American Society of Naval Engineers. He has previously published an article in theJournalof the Societyof NavalEngineers(the predecessor of theNavalEngineersJournal)entitled “Submarine FRAM Program What and Why” May 1960.

来源：评论

学校读者我要写书评

暂无评论

sTRUCTURAL ANALYsIs AND DEsIGN OF A CATAMARAN CROss‐sTRUCTURE BY THE FINITE ELEMENT METHOD

引用

Naval Engineers Journal 1973年第1期85卷 33-42页

作者： MANsOUR, DR.A. FENTON, LCDR. PAUL H. Dr. A. Mansour an Associate Professor in the Department of Ocean Engineering at Massachusetts Institute of Technology received his Bachelor of Science degree in Mechanical Engineering from the University of Cairo in 1958 and his M.E. and Ph.D. degrees in Naval Architecture and Marine Engineering from the University of California at Berkeley in 1962 and 1966 respectively. He has had field experience and design responsibilities for about six years in the Suez Canal Authority John J. McMullen Associates Inc. and M. Rosenblatt and Son Inc. and has been with the Massachusetts Institute of Technology for the past four years. During this period he contributed several technical papers and reports in the areas of structural mechanics sea loads finite element analysis of marine structures and probabilistic structural mechanics. He has been a consultant for several companies and organizations is a member of Sigma Xi and SNAME currently serving as a member of the latter's Stress Analysis and Strength of Structural Elements Panel. USN Lieutenant Commander Paul H. Fenton USN a 1964 graduate of the U.S. Naval Academy recently completed a graduate education program at M.I.T. in the field of Naval Construction and Engineering earning two degrees: Ocean Engineer and Master of Science in Naval Architecture and Marine Engineering. He is presently assigned to the Charleston Naval Shipyard Charleston South Carolina and has had previous duty in the U.S.S. STICKELL (DD 888) and with the Naval Support Activity Saigon.

One of the problems encountered during the design of the AsR‐21 Catamaran is the determination of the effectiveness of the cross‐structure deck plating. In this paper, this problem is examined using the Finite Element Method. The behavior of a multicell box girder representing a catamaran cross‐structure is studied. Because of the relatively low length‐to‐breadth ratio of a typical catamaran cross‐structure, the deck plating effectiveness is found to be rather small. Parametric studies are performed, and curves of the effectiveness as a function of the relevant geometric and loading parameters are presented. These curves may be helpful in the early stages of new designs. © 1973 by the American society of Naval Engineers

关键词：

来源：评论

学校读者我要写书评

暂无评论

Applicability of zirconium loaded okara in the removal and recovery of phosphorus from municipal wastewater

引用

IOP Conference series: Earth and Environmental science 2019年第1期266卷

作者： T A H Nguyen H H Ngo W s Guo T Q Pham T H Cao T H H Nguyen Master's Program in Environmental Engineering VNU Vietnam Japan University Luu Huu Phuoc My Dinh 1 residential area Nam Tu Liem Hanoi Vietnam Centre for Technology in Water and Wastewater School of Civil and Environmental Engineering University of Technology Sydney (UTS) 15 Broadway Ultimo NSW 2007 Australia Graduate University of Science and Technology Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Cau Giay Hanoi Vietnam Faculty of Geology VNU University of Science 334 Nguyen Trai Thanh Xuan Hanoi Vietnam

Recently, there is a new trend to consider wastewater as a precious resource. since phosphorus is a limited non-renewable element, and MAP (Magnesium Ammonium Phosphate - MgNH4PO4.6H2O) is a valuable slow-release fertilizer, the recovery of phosphorous as MAP has received special attention from scientists all over the world. However, the application of this process with municipal wastewater is still a challenge, due to low concentration of phosphorus and high volume of municipal wastewater. This study investigates the potential of reclaiming MAP from municipal wastewater by combination of adsorption and crystallization. soybean milk residue (okara) was loaded with Zirconium (Zr) to prepare the adsorbent (ZLO). Adsorption and desorption experiments were conducted in a semi-pilot scale ZLO packed colum system. Effects of P: N: Mg molar ratios, chemical sources and temperature on the formation of MAP were examined in an attempt to identify the optimal crystallization conditions. The attained precipitate was characterized using XRD, sEM, FTIR techniques. It was found that the ZLO packed column adsorption-desorption system could pre-concentrate phosphorus from municipal wastewater up to 28.36 times, fitting well the minimum requirement (50 mg P/L) for the economical MAP recovery. Up to 95.19% of dissolved phosphorus in desorption solution was recovered at pH = 9, Mg: N: P molar ratio = 2:2:1, using a combination of MgCl2.6H2O and NH4Cl. The harvested MAP exhibited high purity (92.59%), high P-availability (89% by mass), and extremely low levels of heavy metals. The results prove that it is viable to recover MAP from municipal wastewater by employing ZLO as adsorbent, followed by crystallization. This paves the way for mining phosphorus from municipal wastewater and reducing okara as an agricultural byproduct in a green way.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Flare gas recovery as one of the clean development mechanism (CDM) practices

引用

IOP Conference series: Earth and Environmental science 2018年第1期200卷

作者： M s sari Hadiyanto F Muhammad Master Program of Environmental Science School of Postgraduate Studies Diponegoro University Jl. Imam Bardjo S.H No. 5 Pleburan Semarang 50241 Indonesia Department of Chemical Engineering Faculty of Engineering Diponegoro University Jl. H. Prof. Soedarto SH. Tembalang Semarang 50275 Indonesia Department of Biology Faculty of Engineering Diponegoro University Jl. H. Prof. Soedarto SH. Tembalang Semarang 50275 Indonesia

Global warming has become an important issue over the last few decades. One of the causes is the presence of Greenhouse Gases (GHG) which is emitted by human activities. Oil and gas production (drilling, work over, and refinery) for energy consume will be followed by the associated gas. The associated gas will be flared due to safety and non-economic reasons. The objectives of this study are reviewing the environmental impact and utilize technologies from flaring gas. The impact of flaring gas can lead to a decrease in human health, increased GHG, changing the plant metabolism, and decrease the production of agricultural crops. Due to these, there are some technologies to reduce flaring such as: reinjection (EOR activities), PNG, LPG, LNG, CNG, NGH, GTE, and GTL. The flare gas recovery is expected to obtain the lower value of GHG in the air and as one of the clean development mechanism (CDM) practices with a rethink, reuse, reduce, recovery, and recycle principle.

关键词：

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

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

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

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

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：