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Limit equilibrium analysis for stability of soil nailed slope and optimum design of soil nailing parameters

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Journal of Central South University 2017年第11期24卷 2496-2503页

作者： deng Dong-ping LI Liang ZHAO Lian-heng School of Civil Engineering Central South UniversityChangsha 410075China

Reinforcement of slopes using soil nailing can effectively improve slope stability, and it has been widely used in upgrading cut slopes. Based on the assumptions of stresses on the slip surface, a new method for analyzing the stability of a slope reinforced with soil nails was established in the limit equilibrium theory framework, by considering that slope sliding occurs owing to shear failure of the slip surface, which subjects to Mohr–Coulomb(M–C) strength criterion. Meanwhile, in order to easily analyze the stability of a soil nailed slope in actual engineering and facilitate optimum design of parameters for soil nailing, factor of safety(FOS) contour curve charts were drawn on the basis of the established linear proportional relationship between the spacing of soil nails and slope height, and the length of soil nails and slope height. Then, by analyzing and verifying the results obtained from classic examples, some conclusions can be got as follows: 1) The results obtained from the current method are close to those obtained from the traditional limit equilibrium methods, and the current method can provide a strict solution for the slope FOS as it satisfies all the static equilibrium conditions of a sliding body, thus confirming the feasibility of the current method; 2) The slope FOS contour curve charts can be used not only to reliably analyze the stability of a soil nailed slope, but also to design optimally the parameters of soil nailing for the slope with a certain safety requirement.

关键词： slope stability soil nailing limit equilibrium factor of safety contour curve optimum design

Effects of the grain-for-green program on soil erosion in China

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International Journal of Sediment Research 2012年第1期27卷 120-127页

作者： Lei deng Zhou-ping SHANGGUAN Rui LI National Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Northwest A&F University

Severe soil erosion is a serious environmental problem in *** 1999 the Chinese government implemented the Grain-for-Green Program(herein referred to as the Program),a well rounded program of ecological reconstruction to help control the country's soil erosion *** study quantitatively analyzed the impacts of the Program using data from 11 Chinese river systems to evaluate the effects of the Program on soil *** show runoff decreased and the soil erosion significantly decreased because of an increase in the area of farmland-converted *** comparing two time periods,2003-2007 and 1998-2002,runoff and soil erosion were reduced by 18%and 45.4%,***,the Program has the effect of controlling soil erosion while producing ecological benefits.

关键词： China Grain-for-Green Program Runoff Soil erosion

Economic policy uncertainty and firms’investments in venture capital funds:Evidence from China

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China Journal of Accounting Research 2024年第4期17卷 190-206页

作者： Liangyong Wan Xin sui Jing Rao Lai deng School of Business Administration South China University of TechnologyGuangzhouChina School of Management Guangdong University of TechnologyGuangzhouChina

The latest business practice in the Chinese venture capital(VC)market involves the active participation of non-financial firms,as limited partners,in VC *** a unique hand-collected dataset from China,we find that economic policy uncertainty is positively related to the propensity of firms to participate in VC ***-sectional tests show that the positive effect of policy uncertainty on the likelihood of participating in VC funds is enhanced by industrial growth ***,economic consequence tests show that participating in VC funds is conducive to improving investment efficiency,increasing innovation performance and promoting product *** study advances our understanding of firms’investment decisions and the VC industry development amid economic policy uncertainty.

关键词： Economic policy uncertainty Venture capital Investment decision Limited partner

LA-ICP-MS zircon U-Pb dating of tuffites in the Sachakou Pb-Zn mining area, Karakorum, Xinjiang and its establishment of Early Triassic strata

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China Geology 2024年第1期7卷 150-152页

作者： Xiao-jian Zhao Nuo Li Kai Weng Ming Wang Qing-lin sui deng-hui Chen Zhou-ping Guo Meng-qi Jin Xi’an Center China Geological SurveyMinistry of Natural ResourcesXi’an 710054China Xinjiang Research Center for Mineral Resources Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China College of Geography and Remote Sensing Sciences Xinjiang UniversityUrumqi 830046China University of Chinese Academy of Sciences Beijing 100029China No.8 Geological Party Xinjiang Bureau of Geology and Mineral Exploration and DevelopmentAksu 843000China School of Resource&Environment and Safety Engineering University of South ChinaHengyang 421001China

*** In the past decade,a group of medium to giant lead-zinc deposits,represented by Huoshaoyun,Sachakou,and Yuanbaoling,have been discovered in the Aksai Chin region of Karakoram,*** are all located in the Mesozoic carbonate and clastic rock *** Sachakou leadzinc mining area is adjacent to the northwest of the Huoshaoyun lead-zinc mining area and is in the same stratigraphic layer as *** many scholars have been arguing about the type and age of Huoshaoyun lead-zinc mineralization,few scholars have paid attention to the classification of the ore-bearing strata in the *** stratigraphy of the Lower Permian Shenxianwan Group to the Upper Cretaceous Tielongtan Group is exposed in the Sachakou area of Karakorum,Xinjiang,however,the Late Permian-Early Triassic stratigraphy is missing(Fig.1a).Due to the harsh natural conditions in the area and the low level of work,the stratigraphic delineation is not exhaustive,and the regional lithology is dominated by carbonates and clastic rocks,which makes it difficult to identify the age of the regional lithology and causes problems for the exploration and research of lead-zinc in the area.

关键词： strata Triassic Xinjiang

Refractory and Active Ulcerative Colitis Complicated by Venous Thrombosis: a Case Report

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Chinese Medical Sciences Journal 2014年第4期29卷 242-244页

作者： Yu-ling Li sui-ping Huang Yan Chen Department of Gastroenterology Guangdong Provincial Hospital of Traditional Chinese Medicine Second Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine

ULCERATIVE colitis is a chronic inflammatorydisease characterized by diffuse mucosalinflammation involving the rectum and extendingproximally to involve all or part of the colon. Astep-up approach for medical therapy is routinely applied,from 5-aminosalicylic acid （ASA） compounds, corticosteroids,immunomodulators, and biologics.1 Thrombosis, mainlyvenous, is a rare and well-recognized extra-intestinalmanifestation of inflammatory bowel disease.2 In thisarticle, we report the use of thrombolytic and antithrombotictherapy for the venous thrombosis in a 55-year-old malepatient with refractory and active ulcerative colitis withexcellent outcome.

关键词： venous thrombosis refractory ulcerative colitis active ulcerative colitis

Highly crystalline Y_(3)Al_(5)O_(12):Ce^(3+)phosphor-in-silica glass ceramics for high-power solid-state lighting

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Journal of Rare Earths 2024年第11期42卷 2051-2057,I0002页

作者： Shisheng Lin Hang Lin Hongyi Yang Pengfei Wang ping sui Ju Xu Yao Cheng Yuansheng Wang Key Laboratory of Optoelectronic Materials Chemistry and Physics Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou350108China Xiamen Institute of Rare-earth Materials Haixi InstitutesChinese Academy of SciencesXiamen36100China College of Chemistry and Materials Science Fujian Normal UniversityFuzhou350007China

The pursuit of high-brightness solid-state lighting(SSL)stimulates the development of all-inorganic color converters with high *** is required that the fluorescent material is able to cope with the extreme condition generated from the irradiation of high-power-density excitation *** such,in this work,we developed a new composite color converter,i,e.,Y_(3)Al_(5)O_(12):Ce^(3+)phosphor-in-silica glass ceramic(YAG:Ce^(3+)PiSGC).Remarkably,the amorphous SiO_(2)matrix spontaneously transforms into tetragonal SiO_(2)crystallites during co-sintering with crystallization fraction reaching up to>90%(almost full ceramization).The activation energy for crystallization E_(c)and Avrami index n of amorphous silica oxide are 298.5 kJ/mol and 1.71,indicating the diffusion-controlled glass crystallization *** fabricated prototype high-power phosphor-converted white light-emitting diode(pc-wLED)and phosphor-converted white laser diode(pc-wLD)based on YAG:Ce^(3+)PiSGC show satisfactory photometric/colorimetric *** developed color co nverters have combined merits of environmental protection property,cost-effective manufacturing,good luminescent performance,and easy *** study highlights a new kind of opto-functional composite material and its application as an efficient color converter in high-power solid-state lightings.

关键词： Glass ceramics Y_(3)Al_(5)O_(12):Ce^(3+) Laser-driven white light White light-emitting diode Rare earths

Design and implementation of improved watermarking system in WT domain

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The Journal of China Universities of Posts and Telecommunications 2007年第2期14卷 58-63页

作者： ZHANG deng-yin CHEN Jia-ping SUN Jun-cai Institute of Digital Processing and Transmission Nanjing University of Posts s Nanjing 210003 China

This article presents a watermarking algorithm based on one-dimensional （1-D） chaotic map in wavelet transform （WT） domain. Traditional encryption and watermarking technologies in the WT domain are combined in this algorithm. First, the watermark is encoded by a chaotic sequence, which is generated by a key. On the basis of human visual system （HVS）, it is then divided into two parts and embedded into the low- and intermediate-frequency bands of three-layer WT domain. The encryption of the watermark and the choice of embedded areas based on the perceptivity not only confer the watermark with good invisibility but also with good robustness. Meanwhile, it is difficult to decrypt the watermark extracted from the WT domain.

关键词： watermarking chaotic map WT invisibility robustness

The Optimal Investment,Liability and Dividends in Insurance

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Journal of the Operations Research Society of China 2021年第2期9卷 395-409页

作者： ping-Jin deng Xiu-Fang Li Xiao-Wei Chen School of Finance Collaborative Innovation Center for China EconomyNankai UniversityTianjin 300071China

In this paper,we build an optimal control model with the objective to maximize the expected value of the time discount utility by selecting optimal investment,liability and dividend strategies for insurance *** then use the techniques from Merton(J Econ Theory 3(4):373–413,1971)to solve our optimal control problem and deduce the optimal control ***,we analyze the economic impacts on the optimal controls of the parameters in insurance market.

关键词： Asset and liability management Optimal dividends HJB equation

Remote Operation on Quantum State Among Multiparty

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Communications in Theoretical Physics 2007年第5X期48卷 837-840页

作者： CHEN Ai-Xi deng Li WU Qing-ping Department of Applied Physics East China Jiaotong University Nanchang 330013 China

In this paper, a scheme is proposed for performing remote operation on quantum state among multiparty. We use three-particle GHZ state as quantum channels to prepare a state operator, which describes quantum correlation between states and operations. Based on the special characteristic of the state operator, observers can perform unitary operation on a system that is away from observers. Our studies show this process is deterministic. We further consider remote operation among N spatially distributed observers, and the results show the successful realization of remote operation needs collective participation of N parties, that is, there exists strong correlation among multiparty. In addition, we investigate the case in which observers share a three-particle W state as quantum channels to perform remote operation and studies find this process is probabilistic.

关键词： remote operation entangled state state operator