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Reasonable selection of yield criteria for quantitative analysis of unsaturated soil slope stability

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Journal of Mountain Science 2016年第7期13卷 1304-1312页

作者： LIU Zi-zhen YAN Zhi-xin REN Zhi-hua QIU Zhan-hong duan jian School of Civil Engineering and Architecture Taizhou UniversityTaizhou 318000China School of Civil Engineering and Mechanics Lanzhou UniversityLanzhou 730000China Yunnan Province Highway Science and Technology Research Institute Kunming 650051China

The yield criterion parameters of the soil material change with different values of the cohesion and the angle of friction because of sustained rainfall infiltration. Based on the Mohr-Coulomb(M-C) and Drucker-Prager(D-P) yield criteria, some reasonable yield criteria selections were discussed for quantitative analysis of unsaturated soil slope stability. Moreover, a critical point was found at the effective angle of friction equaling to 16.5° by transformation of parameters related to unsaturated soil under sustained rainfall. When the effective angle of friction more than 16.5° through parameter transformation of different yield criteria under natural condition, the calculation result of the safety factor was such that: f(DP1) > f(M-C) > f(equivalent M-C) > f(DP2) > f(DP3). While the effective angle of friction less than 16.5°, through parameter transformation, the safety factors were in the following order: f(DP1) > f(M-C) > f(DP2) > f(equivalent M-C) > f(DP3). The calculated results from a case study showed that the equivalent M-C yield criterion should be the best at evaluating soil slope stability before rainfall; the DP2 yield criterion should be selected to calculate the soil slope stability at the effective angle of friction less than 16.5° under sustained rainfall. The yield criterion should be selected or adjusted reasonably to calculate the safety factor of unsaturated soil slopes before and during sustained rainfall.

关键词： Unsaturated soil slope Yield criteria Parameter transformation Rainfall Safety factor

DATCP:deadline-aware TCP for the commoditized data centers

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The Journal of China Universities of Posts and Telecommunications 2012年第6期19卷 52-62页

作者： ZHANG Peng WANG hong-bo LI Yang-yang DONG jian-kang CHENG Shi-duan State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications

Many flows in data centers have deadlines and missing deadlines would hurt application performance such as affecting response quality in Web applications or delaying computing jobs in MapReduce-like systems. However, transmission control protocol （TCP） which is widely used in data centers now cannot provide deadline-aware transmission service. Service differentiation only distinguishes flows with different priority but is unable to guarantee completion time. In this paper, we propose a new protocol named deadline-aware TCP （DATCP） to provide deadline-aware transmission service for the commoditized data centers, which can be used as a flexible method for flow scheduling. DATCP combines flow urgency and importance to calculate precedence. Flow urgency is dynamically adjusted according to the gap between desired rate and actual throughput. Setting importance can avoid starving the important but no-urgent flows. Furthermore, a flow quenching method is presented which allows as many high precedence flows as possible to meet deadlines under heavy network load. By extensive simulations, the performance of DATCP was evaluated. Simulation results show that DATCP can make flows meet deadlines effectively.

关键词： data center networks (DCN) deadline-aware transmission service TCP flow scheduling

基于“微生物-肠-脑轴”探讨补肾通腑方对APP/PS1小鼠肠道菌群及LPS/TLR4/NF-κB通路的影响

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中国药理学通报 2025年第1期41卷 171-178页

作者：王旭张杰赵敏宋晓雨段建平河南中医药大学第一附属医院脑病科河南郑州450000 河南中医药大学第一临床医学院河南郑州450000 中西医防治重大疾病河南省协同创新中心河南郑州450046

目的探讨补肾通腑方调控肠道菌群,改善阿尔茨海默病(Alzheimer’s disease,AD)模型小鼠学习记忆能力的作用机制。方法以APP/PS1小鼠为研究对象,给予补肾通腑方治疗8周,采用Morris水迷宫法观察小鼠空间学习记忆能力变化;16S rDNA检测小... 详细信息

目的探讨补肾通腑方调控肠道菌群,改善阿尔茨海默病(Alzheimer’s disease,AD)模型小鼠学习记忆能力的作用机制。方法以APP/PS1小鼠为研究对象,给予补肾通腑方治疗8周,采用Morris水迷宫法观察小鼠空间学习记忆能力变化;16S rDNA检测小鼠肠道菌群丰度、多样性变化;HE染色观察海马病理形态学变化;免疫荧光检测海马区小胶质细胞活化情况;Western blot检测TLR4、NF-κB、IL-6等炎症因子表达。结果与模型组相比,补肾通腑方可以缩短AD模型小鼠逃避潜伏期、游泳路径,增加跨越平台次数(P<0.05),提升肠道菌群多样性,调节肠道菌群丰度,促进海马神经元细胞损伤修复,降低iNOS/Iba1共表达,提高Arg1/Iba1共表达(P<0.01),促进小胶质细胞从M1型向M2型转化,下调TLR4、NF-κB、IL-6等促炎因子的表达。结论补肾通腑方改善AD模型小鼠学习记忆能力的作用机制可能与调节肠道菌群介导的LPS/TLR4/NF-κB通路,从而抑制促炎型小胶质细胞活化、减轻中枢神经系统炎症、改善海马区神经元细胞损伤有关。

关键词：阿尔茨海默病补肾通腑方肠道菌群 LPS/TLR4/NF-κB通路 16S rDNA 微生物-肠-脑轴

Special Issue on Electromechanical Coupling Design for Electronic Equipment

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Chinese Journal of Mechanical Engineering 2017年第3期30卷 495-496页

作者： Bao Yan duan jian Rong TAN Key Laboratory of Electronic Equipment Structure Design of Ministry of Education Xidian University State Key Lab of CAD&CG Zhejiang University

With the development of electronic equipment to high accuracy, high density, high frequency, and atrocious ser- vice environment, the functional surface in this type of equipment has increasingly serious problems,

关键词： In Special Issue on Electromechanical Coupling Design for Electronic Equipment Design

Classical Dynamics of Harmonic Generation of the Hydrogen Molecular Ion Interacting with Ultrashort Intense Laser Pulses

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Chinese Physics Letters 2001年第2期18卷 236-238页

作者： LI Chao-hong duan Yi-Wu Wing-Ki Liu jian-Min Yuan Department of Physics Hu’nan Normal UniversityChangsha 410081 Department of Physics University of WaterlooWaterlooOntarioN2L3G1Canada Department of Physics and Atmospheric Science Drexel UniversityPhiladelphiaPA19104USA Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsChinese Academy of SciencesWuhan 430071

Within Born--Oppenheimer approximation,by using the classical trajectory theory,a description for the high-order harmonic generation of the hydrogen molecular ion interacting with ultrashort laser pulses has been *** Coulomb singularities have been remedied by the *** action-angle variables have been used to generate the initial inversion symmetry microcanonical *** a proper intensity range,a harmonic plateau with only odd harmonics *** a larger intensity,because of the existence of chaos,the harmonic spectra become *** a large enough intensity,the ionization takes place and the harmonics *** the chaos causes the noises,the ionization suppresses the harmonic generation,and the onset of the ionization follows the onset of chaos.

关键词： harmonic harmonics chaos

SIMULATION OF THE ATOMIZED FLOW BY SLIT TYPE BUCKET ENERGY DISSIPATOR

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Journal of Hydrodynamics 2005年第6期17卷 758-763页

作者： LIU Shi-he duan hong-dong School of Water Resource and Hydropower Wuhan University Wuhan 430072 China Water Resources and Hydropower Planning and Design general Institute MWR Beijing 100011 China

Slit type bucket is one kind of flip bucket for energy dissipation generally used in the hydraulic project. In this paper the atomized flow produced behind this energy dis sipator is analyzed, a numerical model for the aerated jet con sidering air entrainment and air resistance force is suggested, and simulation of the rain resulted by the atomized flow is also discussed. Furthermore, the prototype observation data for the atomized flow of Dongjiang Hydropower Station is used to verify the model suggested.

关键词： two phase flow atomized flow slit type energy dissipator

Rotationally symmetric pseudo-Khler metrics of constant scalar curvatures

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Science China Mathematics 2011年第5期54卷 925-938页

作者： duan XiaoJuan ZHOU jian Department of Mathematical Sciences Tsinghua University Beijing 100084 China

We study the ordinary differential equations related to rotationally symmetric pseudo-Khler metricsof constant scalar curvatures. We present various solutions on various holomorphic line bundles over projectivespace... 详细信息

关键词： pseudo-Kahler metrics rotationally symmetric constant scalar curvature phase change

Prediction of NO_(x)concentration using modular long short-term memory neural network for municipal solid waste incineration

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Chinese Journal of Chemical Engineering 2023年第4期56卷 46-57页

作者： Haoshan duan Xi Meng jian Tang Junfei Qiao Faculty of Information Technology Beijing University of TechnologyBeijing 100124China Beijing Laboratory of Smart Environmental Protection Beijing 100124China Beijing Key Laboratory of Computational Intelligence and Intelligent System Beijing 100124China Engineering Research Center of Intelligence Perception and Autonomous Control Ministry of Education Beijing 100124China

Air pollution control poses a major problem in the implementation of municipal solid waste incineration(MSWI).Accurate prediction of nitrogen oxides(NO_(x))concentration plays an important role in efficient NO_(x)emission *** this study,a modular long short-term memory(M-LSTM)network is developed to design an efficient prediction model for NO_(x)***,the fuzzy C means(FCM)algorithm is utilized to divide the task into several sub-tasks,aiming to realize the divide-and-conquer ability for complex ***,long short-term memory(LSTM)neural networks are applied to tackle corresponding sub-tasks,which can improve the prediction accuracy of the ***,a cooperative decision strategy is designed to guarantee the generalization performance during the testing or application ***,after being evaluated by a benchmark simulation,the proposed method is applied to a real MSWI *** the experimental results demonstrate the considerable prediction ability of the M-LSTM network.

关键词： Municipal solid waste incineration NO_(x)concentration prediction Modular neural network Model

AIDEDNet:anti-interference and detail enhancement dehazing network for real-world scenes

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Frontiers of Computer Science 2023年第2期17卷 225-235页

作者： jian ZHANG Fazhi HE Yansong duan Shizhen YANG School of Computer Science Wuhan UniversityWuhan 430072China College of Sport Engineering and Information Technology Wuhan Sports UniversityWuhan 430079China School of Remote Sensing and Information Engineering Wuhan UniversityWuhan 430072China

The haze phenomenon seriously interferes the image acquisition and reduces image *** to many uncertain factors,dehazing is typically a challenge in image *** most existing deep learning-based dehazing approaches apply the atmospheric scattering model(ASM)or a similar physical model,which originally comes from traditional dehazing ***,the data set trained in deep learning does not match well this model for three ***,the atmospheric illumination in ASM is obtained from prior experience,which is not accurate for dehazing ***,it is difficult to get the depth of outdoor scenes for ***,the haze is a complex natural phenomenon,and it is difficult to find an accurate physical model and related parameters to describe this *** this paper,we propose a black box method,in which the haze is considered an image quality problem without using any physical model such as ***,we propose a novel dehazing equation to combine two mechanisms:interference item and detail enhancement *** interference item estimates the haze information for dehazing the image,and then the detail enhancement item can repair and enhance the details of the dehazed *** on the new equation,we design an antiinterference and detail enhancement dehazing network(AIDEDNet),which is dramatically different from existing dehazing networks in that our network is fed into the haze-free images for ***,we propose a new way to construct a haze patch on the flight of network *** patch is randomly selected from the input images and the thickness of haze is also randomly *** experiment results show that AIDEDNet outperforms the state-of-the-art methods on both synthetic haze scenes and real-world haze scenes.

关键词： dehaze anti-interference detail enhancement network