检索结果-内蒙古大学图书馆

Heat transfer coefficient on stirring palm fatty acid distillate in a jacketed tank at a dynamic stage

AIP Conference Proceedings 2024年第1期3073卷

作者： I. Dewa Gede Arsa Putrawan Yona Octavia Adli Azharuddin Antonius Indarto Dendy Adityawarman Chemical Engineering Product Design and Development Research Group Institut Teknologi Bandung Bandung Indonesia Tekno Buana Globalindo Company Bandung Indonesia Master Program in Chemical Engineering Institut Teknologi Bandung Bandung Indonesia Chemical Reaction Technology and Catalysis Research Group Institut Teknologi Bandung Bandung Indonesia Chemical Engineering Process Design and Development Research Group Institut Teknologi Bandung Bandung Indonesia

Convective heat transfer coefficients for palm fatty acid distillate have been measured in a batch stirred tank. The heat transfer took place at a dynamic stage in jacketed tanks with a working volume of 3.5 and 10.0 liters, at temperature ranging from 60 to 80°C and Reynolds number ranging from 1000 to 6000. The results indicate that the convective heat transfer coefficient is in the range of 230 to 680 W·m-2·°C-1. The data fit well with the existing empirical model and can be expressed as Nu=0.5·Re⅔·Pr⅓ where Nu, Re, and Pr are Nusselt, Reynolds, and Prandtl numbers.

关键词：

来源：评论

学校读者我要写书评

暂无评论

DESIGN ASPECTS OF NEW SERD CATAPULT

引用

NAVAL ENGINEERS JOURNAL 1977年第1期89卷 55-67页

作者： BRACE, RL MCWADE, JE USN Capt. R.L. Brace: USN reported for active duty in the U.S. Naval Reserve in June 1945 and upon his release from active duty in 1948 entered Chaffey Junior College Ontario Calif. from which he received his Associate Degree in Engineering in June 1949. Subsequently he attended Purdue University from which he received his BS degree in Chemical Engineering in 1951 and while on a Westinghouse Research Fellowship his MS degree in Engineering in 1952. He joined Phillips Petroleum Co. in Oklahoma as a research engineer with the Jet Fuel Research Group upon receiving the latter degree and while so serving obtained 12 patents. In January 1955 he was recalled to active duty and reported to Officers Candidate School. Newport R.I. Upon being commissioned in the U.S. Naval Reserve in May of that year he began his flight training at the Naval Air Training Command ultimately being designated a Naval Aviator and augumented into the regular Navy in 1956. He served with four carrier-based attack squadrons including three combat tours and in 1962 completed a duty assignment with the U.S. Army in South Vietnam. Other assignments include Catapult and Arresting Gear Officer USS Enterprise (CVN-65) duty on the Staff. Commander Naval Air Force. U.S. Atlantic Fleet: Assistant Chief of Staff for Material Task Force 78 during the mine countermeasure operations in North Vietnam Officer-in-Charge. Fleet Air Western Pacific Repair Activity Cubi Point P.I.: and Head. Aircraft Launch and Recovery Equipments Branch Ship Installations Division. Naval Air Systems Command from 1974 to 1976 during which he had full responsibility for all shore-based and shipboard aircraft launching and recovery systems and was Acquisition Manager for the SERD Catapult Program. Capt. Brace who was designated an Aeronautical Engineering Duty Officer in 1964. is a graduate of the U.S. Navy Test Pilot School the Naval War College and the Defense Systems Management School and his military decorations include the Meritorious Service Award the Air Me

来源：评论

学校读者我要写书评

暂无评论

Synthesis of mercaptoethyl ester of palm fatty acid distillate: Effects of dehydration methods

引用

IOP Conference Series: Materials Science and engineering 2020年第1期823卷

作者： I Dewa Gede Arsa Putrawan Dicka Ar Rahim Andri Patuan Anggi Sitompul Salma Rifasari Wakana Research Group on Chemical Engineering Product Design & Development Faculty of Industrial Technology Institut Teknologi Bandung Bandung Indonesia. Research Group on Chemical Engineering Energy & Process System Faculty of Industrial Technology Institut Teknologi Bandung Bandung Indonesia. Study Program of Chemical Engineering Faculty of Industrial Technology Institut Teknologi Bandung Bandung Indonesia.

This research was aimed to evaluate the synthesis of mercaptoethyl ester of palm fatty acid distillate (PFAD) where water as a byproduct was removed by using vacuum distillation and azeotropic distillation. The reactions were done in a batch reactor using para-toluene sulfonic acid (pTSA) as a catalyst. The performances of the synthesis were evaluated by measuring the sulfhydryl content and yield of the product. Compared to dehydration by vacuum distillation, dehydration by azeotropic distillation gave lower sulfhydryl content and yield but faster reaction completion. Azeotropic distillation gave sulfhydryl content and yield in the range of 6–7% and 57–74%, respectively. Vacuum distillation gave sulfhydryl content and yield in the range of 7–9% and 75–85%, respectively.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Mechanical behaviours and modelling of nanostructure anode in Lithium-Ion battery (LIB) – enabling low-cost 3D nanostructures in future LIB for sustainable energy storage

引用

AIP Conference Proceedings 2023年第1期2594卷

作者： C. Harito J. Wijaya R. Fajarna S. K. Tippabhotla O. Thomas F. E. Gunawan A. S. Budiman Industrial Engineering Department Faculty of Engineering Bina Nusantara University Jakarta Indonesia 11480 Industrial Engineering Department BINUS Graduate Program – Master of Industrial Engineering Bina Nusantara University Jakarta Indonesia 11480 Xtreme Materials Lab Engineering Product Development Singapore University of Technology and Design (SUTD) Singapore Aix-Marseille Université CNRS IM2NP UMR 7334 Marseille France

Anode design is a crucial factor for the further development of lithium-ion battery (LIB) technology, especially in terms of achieving high charging rate performance, as typically needed in electric vehicles (EV). In the present work, a unique battery test cell was designed and fabricated to study in-situ the mechanical behavior of the silicon nanowire electrode during electrochemical lithiation using synchrotron X-ray microdiffraction. Modelling of the nanostructured anode was also performed to provide further understanding of the in-situ findings. The combined approach provides further in-depth understanding of the evolution of the mechanics in the silicon nanowires (1D nanostructure) during operation of the battery, and furthermore shows the path for potentially enhancing the performance of the device. 3D nanostructures have been identified as the key to dramatically enhanced kinetics performance of LIB. However, existing fabrication methodologies for 3D nanostructures are inherently expensive – using advanced lithography techniques or other nanopatterning methodologies, as well as using additive manufacturing approaches. Electrospinning (as an integrated additive manufacturing methodology) may be used to produce low-cost 3D-printed fiber structures. This will pave the way to achieve the order of magnitude increase in battery kinetics as needed to realize the vision of the sustainable transportation.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Operational systems, logistics engineering and technology insertion

引用

NAVAL ENGINEERS JOURNAL 1997年第3期109卷 205-220页

作者： Grubb, MJ Skolnick, A Michael J. Grubb:has perfomzed naval engineering at the Crane Division Naval Surface Warfare Center (NSWC) for more than twenty-five years. He currently the program manager for the Sustainable Hardware and Affordable Readiness Practice Program (SHARP). is a Navy-wide logistics research and development prgram aimed at the successful transiton of proved technologies inot the fleet. SHARP focuses on reducing acquisition performance capability reliability maintainability and readiness of these systems. Mr. Grubb has served as a department director for the past eleven years. His most recent assignment was as director of the Tactical Computer Resources and Test Equipment Department. This organization provided acquisition and in-service engineering support of the Navy's tectical embedded computers priphirals displays and mass memory storage devices. The organization also provided a complete range of product engineering and metrology engineerig services for SSP NevSeaSysCom and the Trident Program. Prior to this appointment Mr. Grubb was deptuy director psysical security programs department and site responsible for program management and system integration of ashore integrated security systems. Mr. Grubb holds a B.S. degree in industrial engineering from Iowa State Universtiy an M.S. degree in industrial engineering from Purdue University and has copleted the course work (Dec.'96 for a master's degree in public and environment affairs at Indiana University-Purdue Univeristy Indianapolis. Dr. Alfred Skolnick operates System Science Consultants (SSC) specilizing in strategic planning technical program definiton technology assessment and engineering analyses on selected matters of national interest. He has taught physics mathematics and management sciences at University of Virginia and Marymount University and is currently adjunct professor of mathematics at Northern Virginia Community College. Form 1985 to 1989 he was president of the American Society of Noval Engineers. Dr. Skolnick served at Applied Physic

In an era of fiscal austerity, downsizing and unforgiving pressure upon human and economic capital, it is an Augean task to identify resources for fresh and creative work. The realities of the day and the practical demands of more immediate fleet needs can often dictate higher priorities. Yet, the Navy must avoid eating its seed corn. Exercising both technical insight and management foresight, the fleet, the R&D community, the Office of the Chief of Naval Operations (OpNav) and the product engineering expertise of the Naval Surface Warfare Center (NSWC) are joined and underway with integrated efforts to marry new, fully demonstrated technologies and operational urgencies. Defense funding today cannot sponsor all work that can be mission-justified over the long term because budgets are insufficient to support product maturation within the classical development cycle. However, by rigorous technical filtering and astute engineering of both marketplace capabilities and currently available components, it is possible in a few select cases to compress and, in effect, integrate advanced development (6.3), engineering development (6.4), weapon procurement (WPN), ship construction (SCN), operation and maintenance (O&M,N) budgetary categories when fleet criticalities and technology opportunities can happily meet. In short, 6.3 funds can be applied directly to ''ripe gateways'' so modern technology is inserted into existing troubled or aging systems, sidestepping the lengthy, traditional development cycle and accelerating practical payoffs to recurrent fleet problems. To produce such constructive results has required a remarkable convergence of sponsor prescience and engineering workforce excellence. The paper describes, extensively, the philosophy of approach, transition strategy, polling of fleet needs, technology assessment, and management team requirements. The process for culling and selecting specific candidate tasks for SHARP sponsorship (matching operational need with t

关键词： Naval vessels

来源：评论

学校读者我要写书评

暂无评论

Leatherback turtle conservation and monitoring efforts at the crossroads: A remote sensing perspective 7

Leatherback turtle conservation and monitoring efforts at th...

引用

7th International Conference on Space Science and Communication, IconSpace 2021

作者： Mohan, Midhun Doaemo, Willie Tapilatu, Ricardo F. Mohd Jaafar, Wan Shafrina Wan Adrah, Esmaeel Gopan, Gopika Broadbent, Eben North Shapiro, Aurelie Sasmito, Sigit D Srinivasan, Shruthi Ranagalage, Manjula Varela, Miguel R. Llewelyn, Emma Asok, Frank Huo, Lian-Zhi Silva, Carlos Alberto Paula Dalla Corte, Ana Cardil, Adrian Leite, Rodrigo Vieira University Of California-Berkeley Dept. Of Geography BerkeleyCA94720 United States Pnguot Dept. Of Civil Engineering Lae00411 Papua New Guinea Research Center Of Pacific Marine Resources Papaua Barat Province Manokwari98314 Indonesia Universiti Kebangsaan Malaysia Earth Observation Centre Institute Of Climate Change Bangi43600 Malaysia Morobe Development Foundation Papua New Guinea Morobe Development Foundation United Nations Volunteer Lae00411 Papua New Guinea University Of Florida Spatial Ecology And Conservation Lab School Of Forest Resources And Conservation GainesvilleFL32611 United States Space+Science Wwf Berlin Germany Singapore119077 Singapore Texas A&m Forest Service Department Of Forest Analytics DallasTX75252 United States Rajarata University Of Sri Lanka Faculty Of Social Sciences And Humanities Dept. Of Environmental Management Mihintale50300 Sri Lanka University Of Exeter Centre For Ecology And Conservation Penryn United Kingdom Papua New Guinea Forest Research Institute Forest Product Program Lae00411 Papua New Guinea Chinese Academy Of Sciences Aerospace Information Research Institute Beijing100101 China Federal University Of Paraná-UFPR Dept. Of Forest Science Curitiba80.210-170 Brazil University Of Maryland Dept. Of Geographical Sciences MarylandMD United States University Of Lleida Dept Of Crops And Forest Sciences Lleida Spain Federal University Of Viçosa Dept. Of Forest Engineering MG Viçosa36570-900 Brazil

ISBN: (纸本)9781665425230

The critically endangered West Pacific Ocean subpopulation of the leatherback turtles has faced a significant population decline in the past decades. One of the reasons for this is the loss of nesting habitats in the region. In this pilot study, turtle nesting habitats are remotely monitored employing satellite imageries. This methodology has been used to investigate the extent of habitat loss in the Kamiali wildlife management area along the Huon coast in Papua New Guinea which serves as a major hotspot for the leatherback turtles. Moreover, the conservation of this turtle species is increasingly at risk due to the intensification of community-level conflicts and paucity of donors;data collection endeavors along the Huon coast have been halted since 2014. Using Landsat 8 satellite images for the period 2013 to 2019, a 22.44 % (0.179 km2) decrease in sandy beach areas is noticable, resulting primarily from shrubs-mixed vegetation expansion and coastal squeeze following erosion. The research results highlight the urgency to revamp turtle conservation and data collection initiatives and emphasize the key role remote sensing can play in turtle habitat monitoring, particularly in areas experiencing a conflict of conservational interests. Based on the observations, the study propose four urgent technology-oriented measures-(i) revamping data collection strategies, (ii) developing turtle nesting sensitivity maps, (iii) surveying nesting habitats using drones, and (iv) investigating the influence of logging activities-to enhance leatherback turtle conservation efforts in the Kamiali region, that are expected to have wider applications across the globe especially in the West Pacific and to other sea turtle species. © 2021 IEEE.

关键词： Remote sensing

来源：评论

学校读者我要写书评

暂无评论

NAVAL SURFACE WEAPONS SYSTEMS CONTROL-SYSTEM TECHNOLOGY

引用

NAVAL ENGINEERS JOURNAL 1982年第3期94卷 153-159页

作者： CORNETT, PC The authorat FMC Corporation Northern Ordnance Division (FMC/NOD) has the dual responsibility of Manager of Design Assurance and Project Manager of the new Vertical Load Gun Family (VLGF). He received his BSEE degree from Colorado State University in 1962 and his MSEE degree from the University of Minnesota in 1969. As the Design Assurance Manager at FMC/NOD he is responsible for the areas of: Product Evaluation Human Factors and System Studies Reliability Maintainability and Availability Engineering Standards and Controls and Engineering Test. As Project Manager for the VLGF he has full responsibility for all aspects of the new gun development program. From 1964 to 1979 Mr. Cornett was Senior Project Engineer at FMC/NOD. During this period he was responsible for the development design production and test of electronic control systems for several of the Gun Mounts and Guided Missile Launching Systems produced at FMC/NOD. From 1962 to 1964 he was with Sperry Utah Company as cognizant engineer for an electronic assembly in the Sergeant Missile Launcher. Mr. Cornett has applied for a patent for a velocimeter for measuring projectile muzzle velocity. He is a member of the Institute of Electrical and Electronics Engineers.

The Missile Launching Control System of the Guided Missile Launching System (GMLS) Mark 13 Mod 4 is being modified to improve troubleshooting and maintenance, and a training system has been developed to improve training techniques for the operation of the GMLS Mk 13 Mod 4. The improved training technique is the Launcher Maintenance Operational Training System (LMOTS) which allows the technician to get operational and troubleshooting training at the control panel without the need for an actual launcher attached to that control panel. The launcher is replaced by a Launcher Order Responder Unit (LORU) which simulates the actions of the launcher and the possible failures which may occur within the launcher system. An improved troubleshooting technique for the GMLS Mk 13 Mod 4 is accomplished through the use of Built-In Test Equipment (BITE). The BITE lets the technician identify and troubleshoot problem areas by means of a keyboard/display and the schematic diagrams. In the future, the On-Line Monitor (OLM), may actually do the troubleshooting for the technician. The OLM continuously monitors the system and notifies the technican of any problems via a code on the display. Future technology may also include a redundant microcomputer-based control system which, due to the redundancy, could require little or no unscheduled maintenance. This system, as with the previous system described, is dedicated to increasing the efficiency of troubleshooting the GMLS's control system and helping to reduce the mean time to repair the system.

关键词：

来源：评论

学校读者我要写书评

暂无评论

NAVAL AVIATION PACKAGING IMPROVEMENT INITIATIVE

引用

NAVAL ENGINEERS JOURNAL 1993年第3期105卷 146-151页

作者： GLEANER, I ARTER, R Irving Gleaner:is a mechanical engineer with nearly 25 years experience. He is currently employed in the Packaging Programs Management Branch of the U.S. Naval Aviation Supply Office in Philadelphia Pennsylvania. Since 1988 Mr. Gleaner has been actively involved in the design and development of reusable containers for naval avionic hardware ranging from circuit cards to complete aircraft engines. His work includes the performance of technical investigations material studies manufacturing process evaluations stress analysis calculations and analysis of dynamic shock loadings. Prior to working in the Packaging Branch Mr. Gleaner performed refurbishment feasibility studies of critical aircraft hardware in the Product Engineering Group. Mr. Gleaner's previous background was in the electrical power generation industry. where he designed pressure vessels and storage tanks in support of nuclear power generating stations. Richard Arter:is a packaging specialist with nine years experience. He is employed at the U.S. Naval Aviation Supply Office Packaging Programs Management Branch where he is the current leader of the Container Design Team. Since 1983 Mr. Arter has been active in the development of packaging handling storage and transportation (PHS&T) requirements for naval aviation hardware and support equipment. His work includes logistics planning program management of container development projects preparation of performance specifications and development and improvement of packaging and preservation capabilities at various naval activities.

The Packaging Improvement Initiative is a Navy wide effort to optimize operational readiness, limit degradation, minimize logistic costs, and reduce repair costs and turn-around-times of Naval Aviation Depot Level Repairables (AVDLRs) by improving packaging, handling, storage, and transportation techniques throughout the complete logistics cycle. Using Total Quality Leadership tools with continuous customer feedback. the Naval Aviation Supply Office has developed several goal-oriented strategies, encompassing short-, mid-, and long-term improvements. Rather than merelv refining the present system, the strategies listed below reflect evaluation and restructuring of packaging processes at sites with varying capabilities and missions. Principal strategies include: 1. Packaging repairables in accordance with existing requirements, after repair at a depot, 2. Having sufficient quantities of reusable containers in place at required locations, 3. Ensuring use of containers for retrograde shipments, 4. Developing improved processes to enable afloat customers to properly protect repairables, 5. Reviewing item repair cost, turn-around-time, and reliability impacts, 6. Performing engineering analyses of shipboard material flow, 7. development of multi-item reusable containers, and 8. The merging of resultant initiative savings with Defense Management Review Decisions (DMRDs) to reduce repair, warehousing, handling, and transportation costs.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Modeling crystallographic anisotropy in interfacial sliding phenomenon in nanoindentation of nanoscale Cu/Nb accumulated rolling bonding (ARB) multilayered materials

引用

AIP Conference Proceedings 2023年第1期2594卷

作者： A. S. Budiman R. Sahay F. E. Gunawan C. Harito H. Gunawan I. Radchenko E. Navarro S. Escoubas T. Cornelius O. Thomas N. Raghavan Industrial Engineering Department BINUS Graduate Program – Master of Industrial Engineering Bina Nusantara University Jakarta Indonesia Xtreme Materials Lab Engineering Product Development Singapore University of Technology and Design (SUTD) Singapore Industrial Engineering Department Faculty of Engineering Bina Nusantara University Jakarta Indonesia 11480 Center for Advancing Materials Performance from the Nanoscale (CAMP-nano) State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University (XJTU) Xi'an China Aix-Marseille Université CNRS IM2NP UMR 7334 Marseille France

Nanoindentation is widely used to investigate mechanical properties of materials at small scales. In this work, owing to the presence of contrasting interfaces along rolling (RD) and transverse direction (TD), a 16 nm accumulative roll bonding (ARB) Cu/Nb nanolaminate as a test material due to its crystallographic anisotropy was used. Nanoindentation was performed and then Scanning Probe Microscopy (SPM) data was conducted to measure the pile-up height along RD and TD in the nanoscale Cu/Nb multilayered materials. It was found that the 16 nm Cu/Nb ARB nanolayered material along RD showed higher surface pile-up than TD attributed the observation to the variation in the Cu/Nb interface plasticity along RD and TD. Further, a comparation and validation of experimental indentation data by performing 2D axisymmetric Finite Element Analysis (FEA) indicated that the simulation compares well with the experimentally generated load-displacement curves, while qualitative agreement was obtained with the pileup data. It is believed that the characterization of surface pile-up is very important for enabling the nanoscale Cu/Nb ARB nanolaminates as the novel stretchable/flexible metallic conductor materials (with emerging applications such as e-skins, human-computer interaction, and soft robotics) that may prove crucial for the global green and sustainability efforts (soft robots for collecting plastic trashes in ocean).

关键词：

来源：评论

学校读者我要写书评

暂无评论

Correction to: Biological synthesis and characterization of iron oxide (FeO) nanoparticles using Pleurotus citrinopileatus extract and its biomedical applications

引用

Biomass Conversion and Biorefinery 2023年第11期14卷 12587-12587页

作者： Manimaran, Kumar Yanto, Dede Heri Yuli Govindasamy, Mani Karunanithi, Bogeshwaran Alasmary, Fatmah Ali Habab, Reem Abdulrahman Research Center for Applied Microbiology National Research and Innovation Agency (BRIN) Cibinong Republic of Indonesia Department of Product Development Institute of Biotechnology Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences (SIMATS) Chennai India Faculty International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City Taiwan Korea University Seongbuk-gu Republic of Korea Department of Research and Innovation Saveetha School of Engineering SIMATS Thandalam India Department of Petroleum Engineering Dhaanish Ahmed College of Engineering Chennai India Department of Chemistry College of Science King Saud University Riyadh Saudi Arabia

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：