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Bearing and uplift capacities of under-reamed piles in soft clay underlaid by stiff clay using lower-bound

Mantu MAJUMDER, Debarghya CHAKRABORTY

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 537-551 doi: 10.1007/s11709-021-0708-x

Abstract: The bearing and uplift capacities of under-reamed piles are estimated through non-dimensional factorsThe results of this study are expected to be useful for the estimation of the bearing and uplift capacities

Keywords： bearing capacity     uplift capacity     under-reamed pile     clay     limit analysis    

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The new finding of Neogene marine low-resistivity light oil field in the western part of Pearl River Mouth Basin

Xie Yuhong

Strategic Study of CAE 2011, Volume 13, Issue 5,   Pages 16-22

Abstract: generated by shallow lacustrine mudstone and shale of Eocene Wenchang formation could migrate from sag to Qionghaiuplift distantly; neritic shoal-bar reservoir had developed in the 1st member of Zhujiang formation,of the 1st and the 2nd member of Zhujiang formation had constituted hydrocarbon coursing system in Qionghaiuplift; the Dongsha tectonic movement had controlled the late faults by which lower hydrocarbon could

Keywords： Wenchang L low-resistivity light oil field     finding process     reservoir characteristics     pool-forming pattern     Qionghaiuplift    

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Numerical analysis on uplift bearing characteristic of cast in situ DX pile

Chen Lihong,Zhang Qinglin,Yuan Xiyu

Strategic Study of CAE 2012, Volume 14, Issue 1,   Pages 31-36

Abstract: text-align: justify;">This paper analyzes DX single pile with 2 bearing plates on its resistance of upliftcurve and axial force of DX pile are obtained,and the conclusions based on the analysis are drawn.The uplift

Keywords： DX pile     uplift bearing capacity     numerical analysis    

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The characteristics of Paleozoic marine hydrocarbon accumulation in China

Kang Yuzhu

Strategic Study of CAE 2010, Volume 12, Issue 5,   Pages 11-17

Abstract: reservoir-seal assemblage, multi-accumulation model and that hydrocarbon is mainly distributed around paleo-uplift

Keywords： Paleozoic era     marine hydrocarbon field     basin     uplift     depression     hydrocarbon distribution    

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Construction characteristics and effects of DX pile

Tang Songtao,Chen Lihong,Peng Wen

Strategic Study of CAE 2012, Volume 14, Issue 1,   Pages 37-40

Abstract: Meanwhile, the ascending displacements of anchor piles are less than 1 mm, which means even in the uplift

Keywords： DX pile     bearing capacity     settlement     uplift    

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From Brain Science to Artificial Intelligence Review

Jingtao Fan, Lu Fang, Jiamin Wu, Yuchen Guo, Qionghai Dai

Engineering 2020, Volume 6, Issue 3,   Pages 248-252 doi: 10.1016/j.eng.2019.11.012

Abstract:

Reviewing the history of the development of artificial intelligence (AI) clearly reveals that brain science has resulted in breakthroughs in AI, such as deep learning. At present, although the developmental trend in AI and its applications has surpassed expectations, an insurmountable gap remains between AI and human intelligence. It is urgent to establish a bridge between brain science and AI research, including a link from brain science to AI, and a connection from knowing the brain to simulating the brain. The first steps toward this goal are to explore the secrets of brain science by studying new brain-imaging technology; to establish a dynamic connection diagram of the brain; and to integrate neuroscience experiments with theory, models, and statistics. Based on these steps, a new generation of AI theory and methods can be studied, and a subversive model and working mode from machine perception and learning to machine thinking and decision-making can be established. This article discusses the opportunities and challenges of adapting brain science to AI.

Keywords： Artificial intelligence     Brain science    

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Technological development and engineering applications of novel steel-concrete composite structures

Jianguo NIE, Jiaji WANG, Shuangke GOU, Yaoyu ZHU, Jiansheng FAN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 1-14 doi: 10.1007/s11709-019-0514-x

Abstract: structures, the long-span composite transfer structures, the comprehensive crack control technique based on uplift-restricted

Keywords： high-performance composite structure     bi-directional composite     composite transfer     uplift-restricted and    

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An Enhanced Physically Based Scour Model for Considering Jet Air Entrainment

Rafael Duarte,António Pinheiro,Anton J. Schleiss

Engineering 2016, Volume 2, Issue 3,   Pages 294-301 doi: 10.1016/J.ENG.2016.03.003

Abstract:

Based on systematic experiments on the influence of air entrainment on rock block stability in plunge pools impacted by high-velocity jets, this study presents adaptations of a physically based scour model. The modifications regarding jet aeration are implemented in the Comprehensive Scour Model (CSM), allowing it to reproduce the physical-mechanical processes involved in scour formation concerning the three phases; namely, water, rock, and air. The enhanced method considers the reduction of momentum of an aerated jet as well as the decrease of energy dissipation in the jet diffusive shear layer, both resulting from the entrainment of air bubbles. Block ejection from the rock mass depends on a combination of the aerated time-averaged pressure coefficient and the modified maximum dynamic impulsion coefficient, which was found to be a constant value of 0.2 for high-velocity jets in deep pools. The modified model is applied to the case of the observed scour hole at the Kariba Dam, with good agreement.

Keywords： Air entrainment     Uplift     Rock scour     Dam safety     High-velocity jets     Block stability     Scour assessment    

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Discussion on formula for anti pull bearing capacity of DX pile

Yuan Xiyu,He Dexin,Chen Lihong

Strategic Study of CAE 2012, Volume 14, Issue 1,   Pages 69-73

Abstract:

When the DX-pile is under uplift load, the pile-soil interaction consistsof pile shaft resistance and uplift resistance provided by the bells which effectively raises the uplift-pilethe problem of calculating the resistance of bell is still under studied which is the key to DX-pile uplift

Keywords： DX-pile     uplift capacity     resistance of load carrying plate     calculation methods    

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Engram-Driven Videography Article

Fang, Mengqi Ji, Xiaoyun Yuan, Jing He, Jianing Zhang, Yinheng Zhu, Tian Zheng, Leyao Liu, Bin Wang, Qionghai

Engineering 2023, Volume 25, Issue 6,   Pages 101-109 doi: 10.1016/j.eng.2021.12.012

Abstract:

Sensing and understanding large-scale dynamic scenes require a high-performance imaging system. Conventional imaging systems pursue higher capability by simply increasing the pixel resolution via stitching cameras at the expense of a bulky system. Moreover, they strictly follow the feedforward pathway: that is, their pixel-level sensing is independent of semantic understanding. Differently, a human visual system owns superiority with both feedforward and feedback pathways: The feedforward pathway extracts object representation (referred to as memory engram) from visual inputs, while, in the feedback pathway, the associated engram is reactivated to generate hypotheses about an object. Inspired by this, we propose a dual-pathway imaging mechanism, called engram-driven videography. We start by abstracting the holistic representation of the scene, which is associated bidirectionally with local details, driven by an instance-level engram. Technically, the entire system works by alternating between the excitation–inhibition and association states. In the former state, pixel-level details become dynamically consolidated or inhibited to strengthen the instance-level engram. In the association state, the spatially and temporally consistent content becomes synthesized driven by its engram for outstanding videography quality of future scenes. The association state serves as the imaging of future scenes by synthesizing spatially and temporally consistent content driven by its engram. Results of extensive simulations and experiments demonstrate that the proposed system revolutionizes the conventional videography paradigm and shows great potential for videography of large-scale scenes with multi-objects.

Keywords： Instance-level videography     Memory engram     Large-scale dynamic scene     Feedforward and feedback     Entropy equilibrium    

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Construction technology in huge caisson on the ground

Qiu Qionghai,Lin Fan,Jiang Jianghua

Strategic Study of CAE 2010, Volume 12, Issue 4,   Pages 14-20

Abstract:

Taizhou Changjiang River Highway Bridge is a suspension bridge with three towers, two spans and two anchorages. The main span is 2×1 080 m. The south and north foundation of the anchorages are deep water caisson with rectangular plane size 67.9 m×52.0 m. A great many of technical innovations are adopted to solve many technical problems including the disposal of the compound basement, manufacturing and installation of the caisson, fulfillment of concrete in the caisson etc, based on the conditions such as the thick overburden layer at the top of the caisson, the super dimension and the big sinking depth of the caisson. This article gives a brief introduction on construction technologies in huge caisson on the ground and can be taken as a reference during the construction of the super scale caisson on the ground in the future.

Keywords： suspension bridge     anchorage     caisson     assembly     deep-well dewatering     foundation settlement     air suction     bridge construction    

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A refined risk explicit interval linear programming approach for optimal watershed load reduction with objective-constraint uncertainty tradeoff analysis

Pingjian YANG,Feifei DONG,Yong LIU,Rui ZOU,Xing CHEN,Huaicheng GUO

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 1,   Pages 129-140 doi: 10.1007/s11783-014-0683-8

Abstract: using a case study that deals with uncertainty-based optimal load reduction decision making for Lake Qionghai

Keywords： linear programming     decision making     objective-constraint uncertainty tradeoff     aspiration level     Lake Qionghai    

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Analog Optical Computing for Artificial Intelligence Review

Jiamin Wu,Xing Lin,Yuchen Guo,Junwei Liu,Lu Fang,Shuming Jiao,Qionghai Dai,

Engineering 2022, Volume 10, Issue 3,   Pages 133-145 doi: 10.1016/j.eng.2021.06.021

Abstract:

The rapid development of artificial intelligence (AI) facilitates various applications from all areas but also poses great challenges in its hardware implementation in terms of speed and energy because of the explosive growth of data. Optical computing provides a distinctive perspective to address this bottleneck by harnessing the unique properties of photons including broad bandwidth, low latency, and high energy efficiency. In this review, we introduce the latest developments of optical computing for different AI models, including feedforward neural networks, reservoir computing, and spiking neural networks (SNNs). Recent progress in integrated photonic devices, combined with the rise of AI, provides a great opportunity for the renaissance of optical computing in practical applications. This effort requires multidisciplinary efforts from a broad community. This review provides an overview of the state-of-the-art accomplishments in recent years, discusses the availability of current technologies, and points out various remaining challenges in different aspects to push the frontier. We anticipate that the era of large-scale integrated photonics processors will soon arrive for practical AI applications in the form of hybrid optoelectronic frameworks.

Keywords： Artificial intelligence     Optical computing     Opto-electronic framework     Neural network     Neuromorphic computing     Reservoir computing     Photonics processor    

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Title Author Date Type Operation

Bearing and uplift capacities of under-reamed piles in soft clay underlaid by stiff clay using lower-bound

Mantu MAJUMDER, Debarghya CHAKRABORTY

Journal Article

The new finding of Neogene marine low-resistivity light oil field in the western part of Pearl River Mouth Basin

Xie Yuhong

Journal Article

Numerical analysis on uplift bearing characteristic of cast in situ DX pile

Chen Lihong,Zhang Qinglin,Yuan Xiyu

Journal Article

The characteristics of Paleozoic marine hydrocarbon accumulation in China

Kang Yuzhu

Journal Article

Construction characteristics and effects of DX pile

Tang Songtao,Chen Lihong,Peng Wen

Journal Article

From Brain Science to Artificial Intelligence

Jingtao Fan, Lu Fang, Jiamin Wu, Yuchen Guo, Qionghai Dai

Journal Article

Technological development and engineering applications of novel steel-concrete composite structures

Jianguo NIE, Jiaji WANG, Shuangke GOU, Yaoyu ZHU, Jiansheng FAN

Journal Article

An Enhanced Physically Based Scour Model for Considering Jet Air Entrainment

Rafael Duarte,António Pinheiro,Anton J. Schleiss

Journal Article

Discussion on formula for anti pull bearing capacity of DX pile

Yuan Xiyu,He Dexin,Chen Lihong

Journal Article

Engram-Driven Videography

Fang, Mengqi Ji, Xiaoyun Yuan, Jing He, Jianing Zhang, Yinheng Zhu, Tian Zheng, Leyao Liu, Bin Wang, Qionghai

Journal Article

Construction technology in huge caisson on the ground

Qiu Qionghai,Lin Fan,Jiang Jianghua

Journal Article

A refined risk explicit interval linear programming approach for optimal watershed load reduction with objective-constraint uncertainty tradeoff analysis

Pingjian YANG,Feifei DONG,Yong LIU,Rui ZOU,Xing CHEN,Huaicheng GUO

Journal Article

Analog Optical Computing for Artificial Intelligence

Jiamin Wu,Xing Lin,Yuchen Guo,Junwei Liu,Lu Fang,Shuming Jiao,Qionghai Dai,

Journal Article