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Articles 45571 - 45600 of 1108835
Full-Text Articles in Entire DC Network
Geo-Historical Analysis Of Earthquakes In Palestine: Spatial Distribution And Risk Exploration To Enhance Contribution To Decision-Making, Yacoub Al-Qasasfeh
Geo-Historical Analysis Of Earthquakes In Palestine: Spatial Distribution And Risk Exploration To Enhance Contribution To Decision-Making, Yacoub Al-Qasasfeh
Journal of the Arab American University مجلة الجامعة العربية الامريكية للبحوث
This study examines the historical evolution of earthquakes in Palestine from 760 BCE to 2023 CE. The aim is to comprehend and provide insights for decision-makers regarding the seismic nature of the region. The study traces the movement of tectonic plates across various geological eras, analyzing the resulting changes in the geology of Palestine and their role in shaping its current morphology. Using a descriptive, historical, and analytical approach, the study relies on relevant reports and studies. The seismic movements, including medium, strong, and violent earthquakes, were tracked over an extended period. The study calculated the periodic average for each …
Effect Of Different Nutrient Media On Mycelial Growth Of Different Species Of Medicinal Mushroom, Luna Ahmad, Fahed Albiski, Ramzi Murshed, Hijazi Mando, Bssam Al Okla
Effect Of Different Nutrient Media On Mycelial Growth Of Different Species Of Medicinal Mushroom, Luna Ahmad, Fahed Albiski, Ramzi Murshed, Hijazi Mando, Bssam Al Okla
Journal of the Arab American University مجلة الجامعة العربية الامريكية للبحوث
The research was carried out in 2022 in the National Commission for Biotechnology (NCBT). The aim is studying the mycelium growth of 5 commercial strains of four medicinal mushroom: Ganoderma lucidum (G.l), Agaricus blazei (A.b), Hericium erianaceum (H.e) and Lentinus edodes (Tow strains: strain M3782 (L.e1) and strain straw (L.e2)), sourced of Aloha company of USA on four nutrient growth media: Potato Dextrose Agar (PDA), Malt extract Agar (MEA), Sabouroud Dextrose Agar (SDA) and Corn meal agar (CMA). The following mycelium growth parameters were studied: mycelium height (H), mycelium diameter (D), mycelium density (G), growth rate (GR) and growth coefficient …
Methods For Well Placement And Formation Properties Evaluation Using Drilling Vibration Data, Baker Hughes Company
Methods For Well Placement And Formation Properties Evaluation Using Drilling Vibration Data, Baker Hughes Company
Defensive Publications Series
During drilling operations of oil and gas wells, drill string vibrations are inevitable and considered one main reason of drilling malfunctioning and Bottom Hole Assembly (BHA) failures. Such vibrations can be produced by several factors such as downhole weight on bit, bit torque, bit revolutions, rate of penetration and bit axial acceleration. Another reason of drill string vibration is due transition in properties of formations that are being drilled such as in interbedded formations or stringer drilling scenarios. Currently, these vibrations are measured downhole via three-axis accelerometers which sense three basic modes; axial (longitudinal) mode, which is the vibration along …
Limb Light - Interactive Lighting Control, Joseph Pandit, Matthew Tran
Limb Light - Interactive Lighting Control, Joseph Pandit, Matthew Tran
Computer Science and Engineering Senior Theses
The progression of stage lighting in the modern age has significantly influenced the immersive experience of the audience. Through events like Daft Punk’s 2006 Cochella performance, lighting has become more pivotal to performances in every genre. However, interactive, customized lighting remains inaccessible to small and mediumscale performers. The cost of hiring a lighting director or pre-programing each song is simply too much. Current cost effective solutions, like sound-activated effects, lack in both quality and real-time emotional responsiveness.
This thesis presents an interactive lighting control system designed to bridge this gap and create a novel creative tool. Our approach integrates MIDI-triggered …
Influence Of Age At Harvest And Packaging Conditions On Color Stability Of Bovine Psoas Major Muscle, Xiao Lu, Xin Luo, Sulaiman K. Matarneh
Influence Of Age At Harvest And Packaging Conditions On Color Stability Of Bovine Psoas Major Muscle, Xiao Lu, Xin Luo, Sulaiman K. Matarneh
Nutrition, Dietetics, and Food Science Student Research
This study investigated the effect of cattle age on the color stability of Psoas major steaks under different packaging conditions, including polyvinyl chloride (PVC) film packaging, high-oxygen-modified atmosphere packaging (HiOx-MAP), and carbon monoxide modified atmosphere packaging (CO-MAP), over a 14-day storage period. Steaks from old cows had a greater myoglobin content than those from young animals (p < 0.05), resulting in a darker beef color. Regardless of animal age, steaks in PVC and HiOx-MAP exhibited poor color stability during storage, as evidenced by the low color intensity and high surface metmyoglobin (MetMb; p < 0.05). These samples also exhibited a reduced MetMb reducing activity (MRA) and oxygen consumption rate (OCR) and higher 2-thiobarbituric acid reactive substance (TBARS) levels, with these effects being evident in steaks from mature cows. In contrast, steaks stored in CO-MAP had greater redness, MRA, and OCR, along with lower surface MetMb and TBARS levels (p < 0.05), contributing to the limited discoloration of steaks from both age groups. These findings suggest that while both harvest age and packaging affect the shelf stability of bovine steaks, packaging plays a more significant role. CO-MAP proved to be more effective than aerobic packaging and may mitigate age-related differences in color stability.
Transatlantic Forum On Cybersecurity, Nicolas Sabouret, Julien Signoles, Marbin Pazos Revilla
Transatlantic Forum On Cybersecurity, Nicolas Sabouret, Julien Signoles, Marbin Pazos Revilla
GNSI Conference Reports
On June 23, 2025, the Global and National Security Institute (GNSI) in partnership with the University of Paris-Saclay’s Graduate School of Computer Science, the Florida Center for Cybersecurity and the University of South Florida Bellini College of Artificial Intelligence, Cybersecurity and Computing held the Transatlantic Forum on Cybersecurity. This international virtual event brought together leading academics to examine some of the most pressing cybersecurity issues of today. Thought-provoking discussions touched on formal models for cybersecurity, network security and the implications and policies for evolving cybersecurity threats.
Miller Plastic Products Inc V. Nlrb
Next-Generation Biomaterials For Load-Bearing Tissue Interfaces: Sensor-Integrated Scaffolds And Mechanoadaptive Constructs For Skeletal Regeneration, Rahul Kumar, Kyle Sporn, Pranay Prabhakar, Phani Paladugu, Akshay Khanna, Alex Ngo, Chirag Gowda, Ethan Waisberg, Ram Jagadeesan, Nasif Zaman, Alireza Tavakkoli
Next-Generation Biomaterials For Load-Bearing Tissue Interfaces: Sensor-Integrated Scaffolds And Mechanoadaptive Constructs For Skeletal Regeneration, Rahul Kumar, Kyle Sporn, Pranay Prabhakar, Phani Paladugu, Akshay Khanna, Alex Ngo, Chirag Gowda, Ethan Waisberg, Ram Jagadeesan, Nasif Zaman, Alireza Tavakkoli
SKMC Student Presentations and Publications
Advancements in load-bearing tissue repair increasingly demand biomaterials that not only support structural integrity but also interact dynamically with the physiological environment. This review examines the latest progress in smart biomaterials designed for skeletal reconstruction, with emphasis on mechanoresponsive scaffolds, bioactive composites, and integrated microsensors for real-time monitoring. We explore material formulations that enhance osseointegration, resist micromotion-induced loosening, and modulate inflammatory responses at the bone-implant interface. Additionally, we assess novel fabrication methods-such as additive manufacturing and gradient-based material deposition-for tailoring stiffness, porosity, and degradation profiles to match host biomechanics. Special attention is given to sensor-augmented platforms capable of detecting mechanical …
Unifying Explainability And Machine Learning: Towards Trustworthy And Plausible Explanations Without Post-Hoc Manipulations, Ian E. Nielsen
Unifying Explainability And Machine Learning: Towards Trustworthy And Plausible Explanations Without Post-Hoc Manipulations, Ian E. Nielsen
Theses and Dissertations
The deployment of machine learning (ML) in safety-critical domains is impeded by the black-box nature of deep learning models. Although these models excel at discerning complex patterns, their opacity undermines trust, limiting their use for high-stakes tasks. This thesis advances the field of eXplainable Artificial Intelligence (XAI) by introducing novel methods to evaluate and enhance model interpretability, ensuring explanations are both faithful (accurate to the model’s reasoning) and plausible (intelligible to human users). A key challenge in XAI is the unreliability of post-hoc explanation methods. To address this, we propose (1) quantitative evaluation metrics for assessing the faithfulness of local …
Perspectives Regarding Creating A Community Of Inquiry In Online Versions Of Lab Courses, Yuna Buhrman
Perspectives Regarding Creating A Community Of Inquiry In Online Versions Of Lab Courses, Yuna Buhrman
Walden Dissertations and Doctoral Studies
The COVID-19 pandemic shut down science, technology, engineering, and mathematics (STEM) college labs due to the restricted physical access to resources. The problem that was addressed in this study was that there is a lack of understanding of how the three presences of the community of inquiry were implemented by STEM lab instructors when developing online lab courses during emergency remote teaching (ERT). The purpose of this generic qualitative study was to explore perspectives of college STEM lab instructors regarding social, teaching, and cognitive presences in online versions of their lab courses during ERT. Data were collected using semistructured interviews …
Algorithms Of Eversion: Contemporary States And Digital Sovereigns, James Libengood
Algorithms Of Eversion: Contemporary States And Digital Sovereigns, James Libengood
USF Tampa Graduate Theses and Dissertations
The rapid development of artificial intelligence (AI), the internet of things (IoT), and digitization have pushed digital sovereignty to the top of the governance agenda in the 21st century. This notion is expanded upon in this work through seven chapters encompassing theoretical underpinnings, methodological frameworks, and real-world case studies. It shows how multinational corporations dominate digital coloniality, and how the merge of physical and digital reality or eversion poses challenges. The study compares contrasting governance approaches, such as the European Union’s General Data Protection Regulation (GDPR), geared to ethical AI and data protection, versus BRICS nations’ stance on data localization …
Work In Progress: Exploring The Impact Of International Experiences On The Development Of Students’ Entrepreneurial Mindset, Olgha Bassam Qaqish, Marcia Pool, William H. Pennock, Erick Salvador Vasquez, Fahmidah Ummul Ashraf
Work In Progress: Exploring The Impact Of International Experiences On The Development Of Students’ Entrepreneurial Mindset, Olgha Bassam Qaqish, Marcia Pool, William H. Pennock, Erick Salvador Vasquez, Fahmidah Ummul Ashraf
Chemical and Materials Engineering Faculty Publications
International experiences, including collaborative online international learning (COIL) experiences that naturally increase accessibility, are of interest to many undergraduate students. These experiences provide educators a unique opportunity to develop a student's entrepreneurial mindset (EM). Additionally, hands-on experiences aligned with the National Academy of Engineering’s (NAE) grand challenge themes (Sustainability, Security, Health, and Joy of Living) support connections between the experience, disciplinary knowledge, multicultural awareness, and EM. Through this Work-in-Progress (WiP) study, we seek to answer: 1) How do international experiences influence undergraduate science and engineering students’ EM, and 2) How does the international experience modality (i.e., study abroad or COIL) …
Investigating Thermal And Optical Properties In Rare Earth Zirconates For Radiative Barrier Coatings, William Riffe
Investigating Thermal And Optical Properties In Rare Earth Zirconates For Radiative Barrier Coatings, William Riffe
Thermal and Environmental Barrier Coatings VII
Please click Additional Files below to see the full abstract
Tweaking Cmas Wettability By Laser-Induced Surface Modifications Of Thermal Barrier Coatings, Emilie Lam, Alice Dolmaire, Lucille Desprès, Aurélien Sikora, Laura Gemini, Aurélie Julian-Jankowiak, Alan Kéromnès
Tweaking Cmas Wettability By Laser-Induced Surface Modifications Of Thermal Barrier Coatings, Emilie Lam, Alice Dolmaire, Lucille Desprès, Aurélien Sikora, Laura Gemini, Aurélie Julian-Jankowiak, Alan Kéromnès
Thermal and Environmental Barrier Coatings VII
Please click Additional Files below to see the full abstract
Utah Surface Irrigation Water Optimization Opportunities And Barriers, Matt Yost, Clara Anderson, Burdette Barker, Justin Wyatt Clawson, Kalen Taylor, Michael Pace
Utah Surface Irrigation Water Optimization Opportunities And Barriers, Matt Yost, Clara Anderson, Burdette Barker, Justin Wyatt Clawson, Kalen Taylor, Michael Pace
All Current Publications
Surface irrigation systems are still the predominant system used in some parts of Utah, representing nearly half of the irrigated area in the state and the region. Understanding the barriers to water optimization and opportunities for improvement in surface irrigation systems will help ensure their viability. This article presents the results of a survey of surface irrigators in Utah.
Discontinuous Deforma Tion Analysis Of Progressive Toppling Of Rock Slopes With Fractured Slab Structure, Yuan Sifan, Li Tonglu, Haider Mumtaz, Zhang Changliang, Li Ping
Discontinuous Deforma Tion Analysis Of Progressive Toppling Of Rock Slopes With Fractured Slab Structure, Yuan Sifan, Li Tonglu, Haider Mumtaz, Zhang Changliang, Li Ping
Journal of China & Foreign Highway
Progressive toppling of rock sl opes with fractured slab structures is quite common in the slopes of hydropower and highway engineering,posing a potential safety risk during both construction and operational phases.The field investigation found that progressive toppling mostly occurs on slopes with concentrated tectonic stress,intense river incision,and high steepness.Typically,these slopes are composed of hard,thinly-layered,and overthrusted rock mass with a fractured slab structure.From a macroscopic point of view,progressive toppling failure is neither a collapse nor a slide but a form of discontinuous deformation.The traditional limit equilibrium method for slope stability analysis is not suitable for evaluating such slopes.In this paper,by taking …
Prediction For Humidity Adjustment Factor And Dry-Wet Cycle Reduction Factor Of Resilient Modulus Of Subgrade Soil Based On Ann, Wang Xufeng, Fu Wei, Peng Junhui, Hu Jiankun, Zhang Junhui, Li Zhiguang
Prediction For Humidity Adjustment Factor And Dry-Wet Cycle Reduction Factor Of Resilient Modulus Of Subgrade Soil Based On Ann, Wang Xufeng, Fu Wei, Peng Junhui, Hu Jiankun, Zhang Junhui, Li Zhiguang
Journal of China & Foreign Highway
Existing methods for determining the humidity adjustment factor and dry-wet cycle reduction factor of the resilient modulus of subgrade soil are mostly based on laboratory tests that consume a large amount of manpower and time,and the prediction accuracy is limited due to the constraints of specification value ranges.In order to achieve fast and accurate prediction of these two factors,the effects of stress state,moisture content,and the number of dry-wet cycles on the resilient modulus of subgrade soil were investigated through laboratory dynamic triaxial tests.Based on existing literature,physical parameters,state parameters,and stress parameters of subgrade soil were selected,and an artificial neural network prediction …
Experimental Study On Engineering Performance Of Post-Planted Precast Concrete Pile With Prebored Grouting, Zhao Yu, Wang Wei, Jiang Lei, Song Zhenya, Zhang Hao
Experimental Study On Engineering Performance Of Post-Planted Precast Concrete Pile With Prebored Grouting, Zhao Yu, Wang Wei, Jiang Lei, Song Zhenya, Zhang Hao
Journal of China & Foreign Highway
The traditional piling methods of precast concrete (PC) piles are difficult to pass through the hard soil layers and tend to induce severe soil squeezing effects.To address this issue,the technology of a post-planted PC pile with prebored grouting was analyzed.Based on the project of the Hefei‒ Zongyang section of G3W Dezhou ‒ Shangrao Expressway,the bearing characteristics of post-planted PC piles were researched by the load tests of five piles in two different field test sections.The results show that the bearing capacity of the PC piles can be effectively improved by setting the cement mortar coating layer around the PC piles.The …
Research On Evaluation Index Of Low-Temperature Semi-Circular Bending Test Of Asphalt Mixtures, Lyu Songtao, Chen Qi, Lu Weiwei, Zhao Pei, Wang Jinping
Research On Evaluation Index Of Low-Temperature Semi-Circular Bending Test Of Asphalt Mixtures, Lyu Songtao, Chen Qi, Lu Weiwei, Zhao Pei, Wang Jinping
Journal of China & Foreign Highway
This article aims to investigate the low-temperature crack resistance performance of asphalt mixtures under different aging conditions and loading rates and select appropriate indicators to accurately characterize and quantify their performance.Based on the semi-circular bending test,the influence of different aging degrees (unaged,short-term aged,long-term aged for three days,and long-term aged for five days ) and loading rates (50 mm/min,5 mm/min,0.5 mm/min,and 0.1 mm/min ) on the low-temperature performance of asphalt mixtures was investigated.The evaluation effect and applicable range of five crack resistance performance indicators,namely fracture energy (Gf),stress intensity factor (KIC),flexibility index (IFI),crack resistance index (ICRI),and balanced cracking index (IBCI),were studied through …
Research On Pavement Crack Segmentation Based On Swin-U, Wang Hua, Wang Liangcai, Xiong Feng, Hu Jing
Research On Pavement Crack Segmentation Based On Swin-U, Wang Hua, Wang Liangcai, Xiong Feng, Hu Jing
Journal of China & Foreign Highway
To address the issues of overfitting,low computational speed,and insufficient target information extraction in pavement crack segmentation tasks,this study proposed a Swin-U network model based on the U-Net architecture.The model adopted the Swin-Transformer as the feature extraction module to enhance the model ’s fitting capability and enable more accurate crack feature extraction,thereby enhancing segmentation accuracy.Additionally,a stable loss function,Focal Loss,was introduced to improve the accuracy of target segmentation.Experiment results on a proprietary pavement crack dataset show that the Swin-U network model achieves pixel-level segmentation of crack images and significantly outperforms the traditional U-Net.On the test set,it improves the intersection over union and …
Study On Salt Release Mechanism Of Self-Melting Ice Asphalt Mixture And Its Impact On Road Performance, Li Tao, Zhang Xiu ’Ang
Study On Salt Release Mechanism Of Self-Melting Ice Asphalt Mixture And Its Impact On Road Performance, Li Tao, Zhang Xiu ’Ang
Journal of China & Foreign Highway
To study the long-term salt release characteri stics of self-melting ice asphalt mixture and the impact of the complete salt release on pavement durability,an accelerated salt release method was developed using a Los Angeles abrasion tester.The salt release mechanism under varying asphalt types,deicing agent contents,and gradation types was revealed.The impact of the complete salt release on road performance was analyzed.Results show that the Los Angeles abrasion tester-based salt release method achieves 91 times and 114 times higher salt release efficiency than the magnetic stirrer and natural immersion methods,respectively.SBS-modified asphalt mixture exhibits a longer salt release duration.The salt release duration is …
Long-Term Water P Ermeability Performance Of Asphalt Mixtures Under Wide-Scope Void Ratio, Chen Sanxi, Guan Hongxin, Yao Ming, Mo Zhiwei, Jiang Wangheng
Long-Term Water P Ermeability Performance Of Asphalt Mixtures Under Wide-Scope Void Ratio, Chen Sanxi, Guan Hongxin, Yao Ming, Mo Zhiwei, Jiang Wangheng
Journal of China & Foreign Highway
In order to compare the water pe rmeability performance of asphalt mixtures with different void ratios after scouring and clogging,self-developed equipment was adopted to conduct vertical water permeability tests,dynamic water scouring-based water permeability tests,water pressure tests,and simulated clogging tests on semi-open-graded DK- 13 mixtures with void ratios of 9%,11%,and 13%,as well as open-graded PA- 13 mixtures with void ratios of 15%,17%,and 19%.The experimental results show that:① The water permeability performance of the asphalt mixture becomes better as the void ratio increases.The water permeability coefficient changes relatively small after the void ratio of the asphalt mixture reaches 15%,which is attributed to …
Research On Size Effect On Cubic Compressive Strength Of Ground Granulated Blast Furnace Slag-Fly Ash Stabilized Large-Size Macadam, Liu Qunyan, Liu Liping, He Miao, Yuan Lingqing, Zhang Liang
Research On Size Effect On Cubic Compressive Strength Of Ground Granulated Blast Furnace Slag-Fly Ash Stabilized Large-Size Macadam, Liu Qunyan, Liu Liping, He Miao, Yuan Lingqing, Zhang Liang
Journal of China & Foreign Highway
To analyze the effect of specimen size on the compressive strength of ground granulated blast furnace slag-fly ash (GGBFS-FA ) stabilized large-size macadam,the 200 mm × 200 mm × 200 mm cubic specimen and 3 d compressive strength were designated as a reference specimen and strength in this study,and numerical simulations of compressive strength were performed by using a discrete element method for GGBFS-FA stabilized large-size macadam specimens with a maximum particle size (dmax) of 73 mm and five side lengths of 2.0dmax,2.5dmax,3.0dmax,3.5dmax,and 4.0dmax.The size effect mechanism on the mixture ’s compressive strength was revealed from the perspective of energy.By …
Semi-Flexible Pavement Structure Analysis Based On Double Modulus Theory, Pan Qinxue, Zhou Shurui, Hu Jia, Zhang Long, Song Xiaojin, Liu Hongfu
Semi-Flexible Pavement Structure Analysis Based On Double Modulus Theory, Pan Qinxue, Zhou Shurui, Hu Jia, Zhang Long, Song Xiaojin, Liu Hongfu
Journal of China & Foreign Highway
Semi-flexible pavement materials have significant differences in tension and compression.If the mechanical response analysis of pavement structures is conducted by using the traditional linear elastic theory with a single modulus,there will be a considerable deviation from actual situations.To analyze and optimize semi-flexible pavement structures,this paper compared the changes in key mechanical responses of pavement structures under six different semi-flexible layer positions and thickness combinations based on the double modulus theory.The results show that there is a significant difference in the calculation results of key mechanical responses of the pavement based on the double modulus theory and the single modulus theory,with …
Effect Of Mineral Admixtures On Properties Of Shotcrete, Ma Kaikai, Zhao Feng, Sun Rongxiao, Han Song, Hu Peng, Wang Kun
Effect Of Mineral Admixtures On Properties Of Shotcrete, Ma Kaikai, Zhao Feng, Sun Rongxiao, Han Song, Hu Peng, Wang Kun
Journal of China & Foreign Highway
To study the influence of different mineral admixtures on the properties of shotcrete,the effects of four kinds of mineral admixtures including fly ash,silica fume,metakaolin,and carbon black on the rebound rate,one-shot thickness,and compressive strength of shotcrete were analyzed through tests on concrete rebound rate,one-shot thickness,and compressive strength.The results show that:① as the content of carbon black,silica fume,and metakaolin increases from 5% to 10%,the rebound rate of shotcrete decreases by 25.76%,16.46%,and 16.70%,respectively;② carbon black and silica fume have a good effect on increasing the one-shot thickness of concrete.When the content of carbon black and silica fume is 10%,the one-shot thickness exceeds 35 …
Study On Rheological Properties Of Basalt Fiber Asphalt Mastic Modified With Silane Coupling Agent, Liu Yuande, Zheng Nanxiang, Zhang Xiang, Gao Haiwei, Zhang Bowen
Study On Rheological Properties Of Basalt Fiber Asphalt Mastic Modified With Silane Coupling Agent, Liu Yuande, Zheng Nanxiang, Zhang Xiang, Gao Haiwei, Zhang Bowen
Journal of China & Foreign Highway
To investigate the rheological properties of basalt fiber asphalt mastic,a silane coupling agent was used as a modifier for basalt fibers,and the effects of varying fiber contents were analyzed. Cone penetration tests,bending beam rheological tests,and dynamic shear rheometer tests were conducted to evaluate the rheological properties of asphalt mastic consistency, high-temperature stability,and low-temperature cracking resistance under different temperatures and fiber contents.The findings show that the silane-coupled basalt fibers enhance the shear strength and consistency of asphalt mastic.After modification,the phase angle decreases;elastic response increases,and complex modulus improves.Adsorption capacity between fibers and asphalt increases significantly,enhancing high-temperature deformation resistance and low-temperature cracking resistance …
Structural System Reliability Analysis Method For Cable-Supported Bridges Based On Deep Belief Networks, Chen Zhenyu, Xie Bo, Lu Naiwei
Structural System Reliability Analysis Method For Cable-Supported Bridges Based On Deep Belief Networks, Chen Zhenyu, Xie Bo, Lu Naiwei
Journal of China & Foreign Highway
Aiming at the high-precision reconstruction of structural function functions caused by the strong nonlinearity of cable load-bearing bridge structures,this study presented a structural system reliability analysis method based on a deep belief network (DBN ).A long-span suspension bridge was used as the engineering background to identify the dominant fault path of the structural system and analyze the law of structural fault path transfer caused by the deterioration of the suspender strength.Numerical analysis results show that DBN can capture the nonlinear mechanical behavior of the finite element model of the suspension bridge,thereby making the implicit statically indeterminate functional function explicit and …
Research On Rc-Uhpc Composite Slab Frame Culvert Technology In Wave-Affected Areas, Qiu Junfeng
Research On Rc-Uhpc Composite Slab Frame Culvert Technology In Wave-Affected Areas, Qiu Junfeng
Journal of China & Foreign Highway
To address the problems in the construction of offshore bridges and culverts such as the structures susceptible to waves,limited layout,and high cost of soft foundation treatment,this paper proposed a new technical solution for reinforced concrete and ultra-high performance concrete (RC-UHPC ) composite slab frame culverts.With supporting engineering,the ordinary box culvert was selected as a comparison scheme for technical and economic analysis,and the design points and construction procedures of new structures were introduced.Based on the calculation results of the overall bearing force,the bearing performance of the top slab under different load conditions was analyzed,along with an investigation of the secondary internal …
Inverse Analysis Of Thermal Parameters Of Concrete Box Girder Based On De-Bp Neural Network, Yao Yong, Yan Yu, Sun Bo Wen, Wang Yuesong, Jiang Tianyong
Inverse Analysis Of Thermal Parameters Of Concrete Box Girder Based On De-Bp Neural Network, Yao Yong, Yan Yu, Sun Bo Wen, Wang Yuesong, Jiang Tianyong
Journal of China & Foreign Highway
In view of temperature cracks in concrete box girders easily occurring during construction,an inverse analysis method based on uniform design theory and differential evolution back propagation (DE-BP ) neural network was proposed to accurately obtain the thermal parameters of concrete box girders and ensure the reliability of temperature analysis of concrete box girders.This method established the nonlinear relationship between the temperature peak of characteristic points and the thermal parameters through the DE-BP neural network.By using the uniform design method and the Abaqus finite element numerical model,130 sets of sample data were generated.Based on the ratio of 12∶1 for training samples …
Research On Key Construction Monitoring Technology Of Long-Span Skewed Arch And Curved Beam Bridge, Xu Yufeng, Zhang Zhantao, Xie Yunfei, Li Zihui
Research On Key Construction Monitoring Technology Of Long-Span Skewed Arch And Curved Beam Bridge, Xu Yufeng, Zhang Zhantao, Xie Yunfei, Li Zihui
Journal of China & Foreign Highway
As a new structure with sloping arch ribs and curved main beams,a skewed arch and curved beam bridge markedly differs from the conventional bridge in construction monitoring technology due to its complex structure and prominent spatial effect.To investigate the key technology in construction monitoring,this study took a long-span skewed arch and curved beam bridge as the engineering background and discussed construction process simulation analysis,field monitoring,and parameter identification and adjustment of the bridge.The results show that the plate-shell unit model has higher calculation accuracy and can comprehensively show the stresses in all directions of the bridge compared with the beam element …