Open Access. Powered by Scholars. Published by Universities.®

Engineering Commons™

Open Access. Powered by Scholars. Published by Universities.®

Discipline
Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 38851 - 38880 of 196356

Full-Text Articles in Engineering

Multi-Scale Prediction Of Coal Seam Fracture Development In Mg Block, Eastern Margin Of Ordos Basin, Zhu Guanghui, Li Zhongcheng, Shi Suzhen, Shi Hao, Lin Liming, Liu Yancheng, Zhang Xin Mar 2022

Multi-Scale Prediction Of Coal Seam Fracture Development In Mg Block, Eastern Margin Of Ordos Basin, Zhu Guanghui, Li Zhongcheng, Shi Suzhen, Shi Hao, Lin Liming, Liu Yancheng, Zhang Xin

Coal Geology & Exploration

Finding out the development characteristics of coal seam fractures is of great significance for coalbed methane exploitation and safe production of underground coal mines. Logging and seismic are effective means of geophysical identification of coal seam fractures. Electrical imaging, resistivity, density, sonic differential time, natural gamma, neutron porosity and array acoustic logs are used to describe the small scale fracture morphology of No.8 and No.9 coal seams of MG block in the eastern margin of Ordos Basin. The middle-scale fracture of No.8 and No.9 coal seams was predicted by prestack Azimuth AVO inversion in OVT domain. And the large-scale fracture …

Go to article

Table Of Contents, The Editors Mar 2022

Table Of Contents, The Editors

Coal Geology & Exploration

No abstract provided.

Go to article

Research Progress And Development Direction Of Key Technologies For Efficient Coalbed Methane Development In China, Xu Fengyin, Yan Xia, Lin Zhenpan, Li Shuguang, Xiong Xianyue, Yan Detian, Wang Hongya, Zhang Shuangyuan, Xu Borui, Ma Xinyuan, Bai Nan, Mei Yonggui Mar 2022

Research Progress And Development Direction Of Key Technologies For Efficient Coalbed Methane Development In China, Xu Fengyin, Yan Xia, Lin Zhenpan, Li Shuguang, Xiong Xianyue, Yan Detian, Wang Hongya, Zhang Shuangyuan, Xu Borui, Ma Xinyuan, Bai Nan, Mei Yonggui

Coal Geology & Exploration

During the 13th Five Year Plan period, the major problem of the low output of a single well of coalbed methane (CBM) has restricted the efficient development of CBM in China. Through Major National Science and Technology Projects and other technical researches, significant progress has been made in the theoretical understanding and engineering technology of CBM exploration and development. It is manifested in four aspects as follows. Firstly, the exploration concept has changed from looking for rich dessert areas to high-yield dessert areas, and the extensive development deployment has become finer. Secondly, in terms of efficient stimulation technology, with the …

Go to article

Development Status And Thoughts On Coalbed Methane Industry In Xinjiang, Li Ruiming, Zhou Zixin Mar 2022

Development Status And Thoughts On Coalbed Methane Industry In Xinjiang, Li Ruiming, Zhou Zixin

Coal Geology & Exploration

After nearly 10 years of rapid development, great breakthroughs have been made in the exploration and development of coalbed methane(CBM) in Xinjiang Uygur Autonomous Region, China. The theory and drilling pressure drainage technology system of CBM exploration and development applicable to the geological characteristics of Xinjiang have been further clarified and improved, and a number of pilot test projects for ground CBM development have been built, realizing small-scale commercial development and utilization. On the basis of the analysis of resource potential, gas production effect and market demand, the development and utilization of CBM in Xinjiang has the following advantages. First, …

Go to article

Exploration And Development Process Of Coalbed Methane In Eastern Margin Of Ordos Basin And Its Enlightenment, Yang Xiuchun, Xu Fengyin, Wang Hongya, Li Shuguang, Lin Wenji, Wang Wei, Hao Shuai Mar 2022

Exploration And Development Process Of Coalbed Methane In Eastern Margin Of Ordos Basin And Its Enlightenment, Yang Xiuchun, Xu Fengyin, Wang Hongya, Li Shuguang, Lin Wenji, Wang Wei, Hao Shuai

Coal Geology & Exploration

The buried depth of coal seam in the eastern margin of Ordos Basin changes greatly, and the characteristics of coalbed methane reservoir formation and reservoir reconstruction methods vary greatly with different buried depths. At present, coalbed methane exploration gradually extends from a shallow area of 1 000 m to a deeper area of 2 000 m. To study the theory and technology of efficient exploration and development of coalbed methane resources under different burial depths, this paper reviews the exploration and development practices in the eastern margin of Ordos Basin in the past 30 years. According to the changes of …

Go to article

Review Of The Progress Of Geological Research On Coalbed Methane Co-Production, Guo Chen, Qin Yong, Yi Tongsheng, Ma Dongmin, Wang Shengquan, Shi Qingmin, Bao Yuan, Chen Yue, Qiao Junwei, Lu Lingling Mar 2022

Review Of The Progress Of Geological Research On Coalbed Methane Co-Production, Guo Chen, Qin Yong, Yi Tongsheng, Ma Dongmin, Wang Shengquan, Shi Qingmin, Bao Yuan, Chen Yue, Qiao Junwei, Lu Lingling

Coal Geology & Exploration

Coalbed methane (CBM) co-production is an important way to improve the efficiency of CBM development in multi-seam areas, but the special nature of reservoir formation makes the co-mining method and production effect complex and variable, which presents challenges for efficient development. Experts in the field of CBM from China have carried out a lot of basic research and engineering practice on CBM reservoir formation and the feasibility of co-production in multiple seams, which have gained fruitful results, providing strong support for deepening the CBM geological theory and promoting industrial development. To provide reference for subsequent research, engineering implementation and industrial …

Go to article

Enrichment Theory Of Large Area And High Abundance Marine Shale Gas And Its Geological Evaluation Technology Progress And Application, Wang Hongyan, Liu Dexun, Yu Yuanjiang, Zhao Qun, Qiu Zhen, Dong Dazhong, Shi Zhensheng, Sun Shasha, Jiang Zhenxue, Liu Honglin, Zhou Shangwen, Bai Wenhua Mar 2022

Enrichment Theory Of Large Area And High Abundance Marine Shale Gas And Its Geological Evaluation Technology Progress And Application, Wang Hongyan, Liu Dexun, Yu Yuanjiang, Zhao Qun, Qiu Zhen, Dong Dazhong, Shi Zhensheng, Sun Shasha, Jiang Zhenxue, Liu Honglin, Zhou Shangwen, Bai Wenhua

Coal Geology & Exploration

The enrichment characteristics and main controlling factors of marine shale gas, geological evaluation and comprehensive area selection of sweet spots are the core content and key to the breakthrough of shale gas exploration and development in Sichuan Basin and its periphery. On the basis of intensive study of geology and geophysical multidisciplinary joint research, field investigation, survey and sampling analysis of key outcrops, core observation and fine description of key exploration wells, this paper presents the enrichment theory and connotation of geological evaluation technology of large area and high abundance shale gas as well as its recent advances, field applications …

Go to article

Accumulation Model And Exploration And Development Suggestions Of Coal Measure Gas Hydrates In Sanlutian Area Of Muli Coalfield, Qinghai Province, Cao Daiyong, Qin Rongfang, Wang Anmin, Chen Limin, Li Jing, Wei Yingchun Mar 2022

Accumulation Model And Exploration And Development Suggestions Of Coal Measure Gas Hydrates In Sanlutian Area Of Muli Coalfield, Qinghai Province, Cao Daiyong, Qin Rongfang, Wang Anmin, Chen Limin, Li Jing, Wei Yingchun

Coal Geology & Exploration

The Natural Gas Hydrate(NGH) is known as the most promising strategic resource in the 21st century because of its huge energy density, convenient use, high combustion value, and cleanness, and it is an alternative energy source with huge potential for conventional oil and gas resources. The occurrence of the NGH in the Sanlutian area of Muli Coalfield in Qinghai Province is the result of the interaction between the abundant gas sources and the hydrate stability zone in cold highland areas. The NGH in coal-bearing strata is defined as the coal measure gas hydrate, belonging to unconventional coal measure gases. To …

Go to article

Difference Analysis Of Methane Diffusion Properties Between Tectonic Coal And Primary Coal, Meng Zhaoping, Zhang Kun, Shen Zhen Mar 2022

Difference Analysis Of Methane Diffusion Properties Between Tectonic Coal And Primary Coal, Meng Zhaoping, Zhang Kun, Shen Zhen

Coal Geology & Exploration

Primary coal destroyed by geological stresses will form different types of coal structures, and the accumulation and migration of coalbed methane(CBM) are affected by the changes in pore structures, adsorption/desorption, diffusion and permeability. In this paper, the methane isothermal adsorption experiment, and low-temperature liquid nitrogen and carbon dioxide adsorption experiment were carried out on the samples of primary coal and tectonic coal of No.3 coal seam of Zhaozhuang Coal Mine in Qinshui Basin, so as to analyze the adsorption/desorption properties and pore structure characteristics of primary coal and tectonic coal. The methane diffusion difference and control mechanism of primary coal …

Go to article

Physical Simulation Of In-Situ Microbial Methanation In Coal Reservoirs With The Participation Of Supercritical Co2, Su Xianbo, Wang Lufei, Zhao Weizhong, Xia Daping, Zhou Yixuan, Wang Qian Mar 2022

Physical Simulation Of In-Situ Microbial Methanation In Coal Reservoirs With The Participation Of Supercritical Co2, Su Xianbo, Wang Lufei, Zhao Weizhong, Xia Daping, Zhou Yixuan, Wang Qian

Coal Geology & Exploration

Supercritical CO2 can destroy the molecular structure of coal and increase the production of biomethane. To investigate the gas production potential under the in-situ conditions of coal reservoirs with the participation of supercritical CO2, the original reservoir pressure, reservoir temperature, and gas composition of the target coal seam in a coalbed methane block in Xinjiang were used as the in-situ reservoir conditions. The self-designed anaerobic fermentation device for coal reservoirs was used to simulate the in-situ anaerobic fermentation process, and the biogas production, coal surface functional groups and microbial community structure under the in-situ conditions were analyzed. …

Go to article

Molecular Simulation Of The Effect Of Co2/N2 Binary Gas On Methane Adsorption In Coal, Sun Zhixue, Min Cheng, Zhang Wanlu, Jiang Yongping, Yu Xuefeng, Cui Bin Mar 2022

Molecular Simulation Of The Effect Of Co2/N2 Binary Gas On Methane Adsorption In Coal, Sun Zhixue, Min Cheng, Zhang Wanlu, Jiang Yongping, Yu Xuefeng, Cui Bin

Coal Geology & Exploration

The binary gas flooding technology (CO2/N2-ECBM) has become an important means of increasing the production of coalbed methane(CBM). It is of great significance to clarify the CO2/N2 competitive adsorption law in coal seams and its influence on the physical properties of coal seams. The molecular simulation software Materials Studio was used to establish a coal molecular model according to the actual temperature and pressure of the CBM block in Yanchuannan. On the basis of the Grand Canonical Monte Carlo(GCMC) method, the influence of each injection stage in the technology of CO2/N …

Go to article

Characteristics And Significance Of Proppant In Hydraulic Fractures In Coal Reservoirs, Wang Shengwei, Xiong Zhangkai, Lyu Shuaifeng, Gao Chao Mar 2022

Characteristics And Significance Of Proppant In Hydraulic Fractures In Coal Reservoirs, Wang Shengwei, Xiong Zhangkai, Lyu Shuaifeng, Gao Chao

Coal Geology & Exploration

The distribution form and internal characteristics of proppant after coal seam hydraulic fracturing determine the fracturing effect to a great extent. The proppant in the hydraulic fracture exposed in the underground roadways of the coal mine is taken as the research object. The morphology and accumulation characteristics of the proppant were observed, and the relationship between the morphology and accumulation characteristics of the proppant and its stacking process was analyzed. Then, the morphology and accumulation characteristics of the proppant obtained at the typical part of the hydraulic fracture are described, which provides a basis that restores the stacking process of …

Go to article

Influencing Factors On Gas Production Effect Of Acid Fractured Cbm Wells In Deep Coal Seam Of Daning-Jixian Block, Li Shuguang, Wang Hongna, Xu Borui, Zhen Huaibin, Wang Chengwang, Yuan Pu Mar 2022

Influencing Factors On Gas Production Effect Of Acid Fractured Cbm Wells In Deep Coal Seam Of Daning-Jixian Block, Li Shuguang, Wang Hongna, Xu Borui, Zhen Huaibin, Wang Chengwang, Yuan Pu

Coal Geology & Exploration

The No.8 deep coal seam in Daning-Jixian Block is large, thick, widely distributed, and rich in coalbed methane(CBM) resources. After volume acid fracturing, a breakthrough has been achieved in the producing test. However, the productivity of the testing wells varies greatly, and the major controlling factors of productivity are not clear, severely restricting the CBM development. In this paper, the testing wells in the No.8 coal seam with a buried depth of more than 2 000 m of the Upper Carboniferous Benxi Formation in Daning-Jixian Block were taken as the research object, and 28 typical evaluation indicators were selected from …

Go to article

Geological Adaptability Analysis And Operational Parameter Optimization For Staged Fracturing Horizontal Wells In Coal Seam Roof, Jiang Zaibing, Li Haozhe, Xu Yaobo, Zhang Qun, Li Guihong, Fan Yao, Jiang Wenping, Shu Jiansheng, Pang Tao, Cheng Bin Mar 2022

Geological Adaptability Analysis And Operational Parameter Optimization For Staged Fracturing Horizontal Wells In Coal Seam Roof, Jiang Zaibing, Li Haozhe, Xu Yaobo, Zhang Qun, Li Guihong, Fan Yao, Jiang Wenping, Shu Jiansheng, Pang Tao, Cheng Bin

Coal Geology & Exploration

The technique of staged fracturing horizontal wells in coal seam roof is effective for efficient extraction of coalbed methane (CBM) in broken soft and low-permeability coal seams. With the help of the major national science and technology projects of the 13th Five Year Plan for National Economic and Social Development, the efficient extraction technology of CBM by staged fracturing horizontal wells in coal seam roof was studied. By using theoretical analysis and numerical simulation, the fracture propagation patterns in different in-situ stress states were compared, and the influence of the angle between the horizontal well layout orientation and the minimum …

Go to article

Barriers And Enablers For Older Adults Participating In A Home-Based Pragmatic Exercise Program Delivered And Monitored By Amazon Alexa: A Qualitative Study, Paul Jansons, Jackson Fyfe, Jack Dalla Via, Robin M. Daly, Eugene Gvozdenko, David Scott Mar 2022

Barriers And Enablers For Older Adults Participating In A Home-Based Pragmatic Exercise Program Delivered And Monitored By Amazon Alexa: A Qualitative Study, Paul Jansons, Jackson Fyfe, Jack Dalla Via, Robin M. Daly, Eugene Gvozdenko, David Scott

Research outputs 2022 to 2026

Background: The remote delivery and monitoring of individually-tailored exercise programs using voice-controlled intelligent personal assistants (VIPAs) that support conversation-based interactions may be an acceptable alternative model of digital health delivery for older adults. The aim of this study was to evaluate the enablers and barriers for older adults participating in a home-based exercise program delivered and monitored by VIPAs. Method: This qualitative study used videoconferencing to conduct semi-structured interviews following a 12-week, prospective single-arm pilot study in 15 adults aged 60 to 89 years living alone in the community. All participants were prescribed an individualized, brief (10 min, 2–4 times …

Go to article

A Combined Approach For Private Indexing Mechanism, Pranita Maruti Desai Ms., Vijay Maruti Shelake Mr. Mar 2022

A Combined Approach For Private Indexing Mechanism, Pranita Maruti Desai Ms., Vijay Maruti Shelake Mr.

Journal of Digital Forensics, Security and Law

Private indexing is a set of approaches for analyzing research data that are similar or resemble similar ones. This is used in the database to keep track of the keys and their values. The main subject of this research is private indexing in record linkage to secure the data. Because unique personal identification numbers or social security numbers are not accessible in most countries or databases, data linkage is limited to attributes such as date of birth and names to distinguish between the number of records and the real-life entities they represent. For security reasons, the encryption of these identifiers …

Go to article

Activated Carbon As Superadsorbent And Sustainable Material For Diverse Applications, Gaurav Sharma, Shweta Sharma, Amit Kumar, Chin Wei Lai, Mu. Naushad, Shehnaz (Panjab University Shehnaz (Panjab University, Jibran Iqbal, Florian J. Stadler Mar 2022

Activated Carbon As Superadsorbent And Sustainable Material For Diverse Applications, Gaurav Sharma, Shweta Sharma, Amit Kumar, Chin Wei Lai, Mu. Naushad, Shehnaz (Panjab University Shehnaz (Panjab University, Jibran Iqbal, Florian J. Stadler

All Works

Activated carbon is a carbonaceous material with highly porous structure. Different functionalities can be introduced to its surface by various physical and chemical treatments. Various precursors can be used for the synthesis of activated carbon such as fossil fuels, agricultural wastes, and lignocellulosic wastes, etc. Number of papers have been reported in literature devoted to the synthesis, characterization, and various applications of activated carbon. Herein, in this review, special attention has been paid to the basic properties of activated carbon and its surface chemistry originated due to physical and chemical treatment. In addition, a general introduction to adsorption process, various …

Go to article

Microstructural Characteristics And Mechanical Properties Of Additively Manufactured Cu–10sn Alloys By Laser Powder Bed Fusion, Abhishek Mehta, Le Zhou, Holden Hyer, Thinh Huynh, Binghao Lu, Erica J. Drobner, Sun Hong Park, Yongho Sohn Mar 2022

Microstructural Characteristics And Mechanical Properties Of Additively Manufactured Cu–10sn Alloys By Laser Powder Bed Fusion, Abhishek Mehta, Le Zhou, Holden Hyer, Thinh Huynh, Binghao Lu, Erica J. Drobner, Sun Hong Park, Yongho Sohn

Mechanical Engineering Faculty Research and Publications

Cu – 10 wt% Sn (Cu–10Sn) alloy specimens were additively manufactured by varying the laser powder bed fusion (LBPF) processing parameters, e.g., laser power (200–350 W) and laser scan speed (100–1400 mm/s) at a fixed hatch spacing (0.12 mm) and slice thickness (0.03 mm), to examine their effects on the density, melt pool structure, and microstructure. Microstructural characteristics of the most dense sample were examined using electron microscopy (SEM, TEM) and X-ray Diffraction. The grains in the top-most melt pool layer showed a fan-like structure, whereas all other areas showed small columnar structure aligned nearly parallel to the build direction …

Go to article

Design And Evaluation Of A Prototype Low-Damage Beam-Column Connection For Mass Timber Moment Frames, Samuel D. Richmann Mar 2022

Design And Evaluation Of A Prototype Low-Damage Beam-Column Connection For Mass Timber Moment Frames, Samuel D. Richmann

Civil and Environmental Engineering Master's Project Reports

A moment-resisting, beam-column connection for mass timber moment frames was developed, designed and tested. The design was intended to limit damage to the timber members by creation of a ductile failure mechanism in steel U-shaped flexural plates (UFPs). Using design equations developed by previous research on UFPs by Baird, et al. (2014) as well as accepted design practices from the NDS and AISC, the components were sized to eliminate failure in the timber. The connection was tested using a quasi-static lateral displacement method following the procedure outlined in section K2.4b of AISC 341-16. A vertical load was placed on the …

Go to article

Towards Trojan Detection From A Raw Bitstream, Corey Ryan Simpson Mar 2022

Towards Trojan Detection From A Raw Bitstream, Corey Ryan Simpson

Theses and Dissertations

Many avenues exist to insert malicious circuitry into an FPGA designs, including compromised CAD tools, overwriting bitstream files, and post-deployment attacks. The proprietary nature of the Xilinx bitstreams precludes the ability to validate an implemented design. This thesis introduces the BitRec and IPRec projects in an effort to support trojan detection tools. BitRec provides a novel approach to mapping of the Xilinx bitstream format into FPGA features in order to recreate the original design's netlist. BitRec supports the 7 Series, UltraScale and UltraScale+ architectures. IPRec then provides a novel approach to recognizing parameterizable IP within a flattened netlist in an …

Go to article

Exploring Magneto-Excitons In Bulk And Mono-Layer Semiconductors Using Non-Linear Spectroscopy Techniques, Varun Mapara Mar 2022

Exploring Magneto-Excitons In Bulk And Mono-Layer Semiconductors Using Non-Linear Spectroscopy Techniques, Varun Mapara

USF Tampa Graduate Theses and Dissertations

The research in two-dimensional (2D) materials has evolved from ``traditional" quantum wells based on group III-V and II-VI semiconductors to atomically thin sheets of van der Waals materials such as 2D semiconducting Transition Metal Dichalcogenides (TMDs). These 2D materials remain a stimulating field that continues to introduce new challenges. From both a fundamental physics and technological perspective, magneto-optical spectroscopy has been an essential tool in this research field. TMDs, for example, pose the challenge of characterizing their spin-valley-resolved physics and deriving implications in quantum computation and information research. With the discovery of valley Zeeman effects, the spin-valley physics of TMDs …

Go to article

Photo-Induced Drug Release From Polymeric Micelles And Liposomes: Phototriggering Mechanisms In Drug Delivery Systems, Najla M. Salkho, Nahid S. Awad, William G. Pitt, Ghaleb A. Husseini Mar 2022

Photo-Induced Drug Release From Polymeric Micelles And Liposomes: Phototriggering Mechanisms In Drug Delivery Systems, Najla M. Salkho, Nahid S. Awad, William G. Pitt, Ghaleb A. Husseini

Faculty Publications

Chemotherapeutic drugs are highly effective in treating cancer. However, the side effects associated with this treatment lower the quality of life of cancer patients. Smart nanocarriers are able to encapsulate these drugs to deliver them to tumors while reducing their contact with the healthy cells and the subsequent side effects. Upon reaching their target, the release of the encapsulated drugs should be carefully controlled to achieve therapeutic levels at the required time. Light is one of the promising triggering mechanisms used as external stimuli to trigger drug release from the light-responsive nanocarriers. Photo-induced drug release can be achieved at a …

Go to article

Research On 3d Path Planning Algorithm Based On Fast Rrt Algorithm, Zhaoqiang Li, Shiyu Zhang Mar 2022

Research On 3d Path Planning Algorithm Based On Fast Rrt Algorithm, Zhaoqiang Li, Shiyu Zhang

Journal of System Simulation

Abstract: RRT (rapidly exploring random tree) algorithm is a sampling-based path planning algorithm, which can search a path in high-dimensional environment. The traditional RRT algorithm has the problems of low node utilization and large amount of calculation. To solve these problems, the fast RRT* (Quick RRT*) algorithm is improved by optimizing the strategy of reselection of parent node and pruning range, improving the sampling method and introducing adaptive step size, which makes the algorithm time-consuming and path length shorter. At the same time, the node connection screening strategy is added to eliminate the excessive turning angle in the path. …

Go to article

Research On Real-Time Motion Matching Of Shadow Play Based On Kinect, Chuanqian Tang, Zhiqiang Liu, Yijun Su, Xiaojing Liu Mar 2022

Research On Real-Time Motion Matching Of Shadow Play Based On Kinect, Chuanqian Tang, Zhiqiang Liu, Yijun Su, Xiaojing Liu

Journal of System Simulation

Abstract: In the inheritance of shadow play culture, due to the aging of the audience and the discontinuity of inheritance, the shadow play culture is gradually facing decline. Real-time matching of shadow play movements based on Kinect can inject new vitality into traditional shadow play culture. According to the characteristics of shadow play, a joint point shadow play model is constructed, and the static digitization of shadow play is realized. The human body depth image is obtained based on Kinect, and the human skeleton point coordinates are obtained through segmentation mask and machine learning to generate the human skeleton.Bone …

Go to article

Achieving Optimal Value Of Solar: A Municipal Utility Rate Analysis, Ben Saarloos, Jason C. Quinn Mar 2022

Achieving Optimal Value Of Solar: A Municipal Utility Rate Analysis, Ben Saarloos, Jason C. Quinn

Faculty Work Comprehensive List

Wind and solar renewable energy in the United States is projected to triple by 2050 to nearly 30% of total electric energy generation. The upper Midwest region (Iowa, Minnesota, and North and South Dakota in particular) is considered wind energy country and not historically known for solar energy development. In this work, Value of Solar (VOS) is developed as a photovoltaic (PV) optimization measure and analysis tool using a northwest Iowa municipality as a representative case study. By applying a top-down load duration curve system analysis, VOS is used to optimize PV orientation and compare electric rate structures for increasing …

Go to article

Microcystin-Lr Removal From Water Via Enzymatic Linearization And Ultrafiltration, Abelline Fionah, Cannon Hackett, Hazim Aljewari, Laura Brady, Faisal Alqhtani, Isabel C. Escobar, Audie K. Thompson Mar 2022

Microcystin-Lr Removal From Water Via Enzymatic Linearization And Ultrafiltration, Abelline Fionah, Cannon Hackett, Hazim Aljewari, Laura Brady, Faisal Alqhtani, Isabel C. Escobar, Audie K. Thompson

Chemical Engineering Faculty Publications and Presentations

Microcystin-LR (MC-LR) is a toxin produced by cyanobacteria that can bloom in freshwater supplies. This study describes a new strategy for remediation of MC-LR that combines linearization of the toxin using microcystinase A, MlrA, enzyme with rejection of linearized byproducts using membrane filtration. The MlrA enzyme was expressed in Escherichia coli (E. coli) and purified via a His-tag with 95% purity. Additionally, composite membranes made of 95% polysulfone and 5% sulfonated polyether ether ketone (SPEEK) were fabricated and used to filter a solution containing cyclic and linearized MC-LR. Tests were also performed to measure the adsorption and desorption of MC-LR …

Go to article

Autonomous Design Of New Chemical Reactions Using A Variational Autoencoder, Terence Musho, Robert Tempke Mar 2022

Autonomous Design Of New Chemical Reactions Using A Variational Autoencoder, Terence Musho, Robert Tempke

Faculty & Staff Scholarship

Artificial intelligence based chemistry models are a promising method of exploring chemical reaction design spaces. However, training datasets based on experimental synthesis are typically reported only for the optimal synthesis reactions. This leads to an inherited bias in the model predictions. Therefore, robust datasets that span the entirety of the solution space are necessary to remove inherited bias and permit complete training of the space. In this study, an artificial intelligence model based on a Variational AutoEncoder (VAE) has been developed and investigated to synthetically generate continuous datasets. The approach involves sampling the latent space to generate new chemical reactions. …

Go to article

Standards-Compatible Smoke Points For Mono- And Un- Substituted Cycloalkane Fuel Components, Adekunle Vincent Adeniyi Mar 2022

Standards-Compatible Smoke Points For Mono- And Un- Substituted Cycloalkane Fuel Components, Adekunle Vincent Adeniyi

Theses and Dissertations

Emissions from the aviation industry have increased significantly over the decades and may continue to pose an environmental threat. Accordingly, efforts are being made to replace conventional aviation fuels with more sustainable alternatives that can both reduce net CO2 emissions as well as reduce other pollutants (i.e., particulates). Conventional jet fuels include aromatic species, which have high sooting tendency. Therefore, to reduce particulate emissions, the fuel aromatics content must be reduced. Cycloalkanes have potential for replacing aromatics content in jet fuel but, compared to other broad classes of chemical species that make up conventional and alternative jet fuel, there is …

Go to article

Effectiveness Evaluation Of Surface Ship Air Defense And Antimissile Combat In Complex Electromagnetic Environment, Gaofeng Zhang, Liang Wu Mar 2022

Effectiveness Evaluation Of Surface Ship Air Defense And Antimissile Combat In Complex Electromagnetic Environment, Gaofeng Zhang, Liang Wu

Journal of System Simulation

Abstract: In order to effectively evaluate the effectiveness of surface ship air defense and antimissile combat in complex electromagnetic environment, a surface ship air defense and antimissile combat effectiveness index system is established considering the influence of equipment, environment and human behavior, the evaluation process of surface ship air defense and antimissile combat effectiveness based on analytic hierarchy process(AHP) is proposed, and a hierarchical structure model of effectiveness evaluation is constructed including five levels of target layer, sub-efficiency layer, capability layer, constraint layer and plan layer. The application shows that the evaluation process and structure model can fully reflect the …

Go to article

New Embedded Simulation Technology For Smart Internet Of Things, Bohu Li, Xudong Chai, Lin Zhang, Duzheng Qing, Guoqiang Shi, Tingyu Lin, Liqin Guo, Chen Yang, Mu Gu, Zhengxuan Jia, Hui Gong, Zhen Tang Mar 2022

New Embedded Simulation Technology For Smart Internet Of Things, Bohu Li, Xudong Chai, Lin Zhang, Duzheng Qing, Guoqiang Shi, Tingyu Lin, Liqin Guo, Chen Yang, Mu Gu, Zhengxuan Jia, Hui Gong, Zhen Tang

Journal of System Simulation

Abstract: Human society in the new development era and journey is facing the new situation. The operation paradigm, technology and ecosystem of industries related to the national economy and people's livelihood、national security are changing significantly towards the digital, networked, cloud-based and intelligent "Smart Internet of Things". The new embedded simulation technology, with the capabilities of online and continuous analysis, cognition, learning, decision-making, operation and optimization,is urgently needed for the development of "Smart Internet of Things". "Smart Internet of Things" is briefly introduced and the connotation, characteristics and application mode of the new embedded simulation technology are proposed and its architecture, …

Go to article

First Prev Next Last