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Search Results: 1 - 10 of 11891 matches for " Yin Zongze "
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VARIATION OF UNSATURATED SOIL STRENGTH WITH WATER CONTENTS
非饱和土强度随含水量的变化

LING Hua,YIN Zongze,
凌 华
,殷宗泽

岩石力学与工程学报 , 2007,
Abstract: The variation of the strength of unsaturated soil with water contents is studied;and the practical strength formula is developed.To study the relationship between the strength and the water content,it is necessary to keep the water content constant in the test.The pore air pressure dissipates quickly and the pore water pressure does not have such behavior.To study the problem,it is necessary to guarantee that the pore air pressure has dissipated completely in the test,and to adjust the general triaxial test apparatus to strength tests of unsaturated soil.The test procedure and control measures to realize the above two test aims are put forward.Secondly,based on the test results,the influences of water contents on strength are analyzed.It can be easily found that the cohesion and the angle of internal friction of unsaturated soil decrease linearly with the increase of water content.Then,the total stress strength formula of unsaturated soil is established.If the water content distribution of soil strata is known,the strength can be easily obtained by the presented formula,i.e.the difficulty of measuring and calculating suction pressure can be avoided.For the water content can be easily obtained,the presented formula is convenient and practical.
NEW PREDICTION METHOD OF STABILITY TIME FOR ANTI-SLIDE STRUCTURES
抗滑结构稳定时间的预测方法

ZHENG Mingxin,YIN Zongze,WU Jimin,
郑明新
,殷宗泽,吴继敏

岩石力学与工程学报 , 2006,
Abstract: On the basis of in-situ survey data,the displacement of anti-slide pile top is predicted using the gray prediction theories of GM(1,1) model.Furthermorea,ccording to the definition of very slow speed of landslide by D.J.Varnes and the rule of deformation stability of in-situ loading test,the critical speed of anti-slide structure stability is put forward.Then,by combining the gray prediction equation of displacement of anti-slide pile top and the critical speed of anti-slide structure,the stability time of anti-slide structure is solved,and a new method for stability time prediction is set up for anti-slide structure.
STUDY ON DEFORMATION CHARACTERISTIC OF SILT BY TRUE TRIAXIAL TEST
粉砂侧向变形特性的真三轴试验研究

Xu Zhiwei,Yin Zongze,
徐志伟
,殷宗泽

岩石力学与工程学报 , 2000,
Abstract: 保持小主应力、中主不应力不变,在大主应力方向加荷是实际工程中可能存在的一种应力路径。就该应力路径分别对粉砂、细砂和中砂进和组真三轴试验,针对粉砂的真三轴试验结果,对其应力-应变关系及反映侧向变形变化规律的治经进行了特定条件下的研究。在特定的应力路径下排水剪切,小主应力方向膨胀,泊桦比可以大于0.5甚至大于1,中主应力方向首先压缩,之后膨胀,泊松比可以小于0,这是现代土力学和有限元分析中不曾考虑的
SOLUTION OF NONLINEAR CONSOLIDATION PROBLEM BY RADIAL POINT INTERPOLATION METHOD WITH UNEQUAL-RANK POLYNOMIAL BASIS
不等阶多项式基径向点插值法求解非线性固结问题

Wang Zhiliang,Wang Jianguo,Yin Zongze,
王志亮
,王建国 殷宗泽

岩石力学与工程学报 , 2004,
Abstract: 引入著名的邓肯-张模型,采用一种新型无单元法——不等阶多项式基径向点插值法,对平面应变下比奥固结问题进行了非线性数值分析。其中,对于位移插值函数,令其多项式基比孔隙水压力的高一阶,而径向基阶数二者相同。计算结果表明,当时间步长、结点分布和数值积分方案都相同时,该法的解与有限元解非常吻合,且精度高于等阶多项式基径向点插值法,并能减少甚至避免计算结果出现的数值涟漪现象。
THE MULTIGRID METHOD TO ROCK MECHANICS AND ENGINEERING
多重网格法在岩石力学与工程中的应用

Wang Jianhua,Yin Zongze,Zhao Weibing,
王建华
,殷宗泽,赵维炳

岩石力学与工程学报 , 1995,
Abstract: A multigrid algorithm is described in this paper,which can be used to obtain the finite element solution of rock mechanics and engineering problems.The design anddata structure of adaptive multigrid finite element software are discussed in detail.Numerical experiments performed with the stress analysis of underground cavern excavation problems have shown that the multigrid method is an effective matrix equation solver for rock mechanics and engineering problems.
Biochemical Characterization of a Haloalkane Dehalogenase DadB from Alcanivorax dieselolei B-5
Anzhang Li, Zongze Shao
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0089144
Abstract: Recently, we found that Alcanivorax bacteria from various marine environments were capable of degrading halogenated alkanes. Genome sequencing of A. dieselolei B-5 revealed two putative haloalkane dehalogenase (HLD) genes, which were supposed to be involved in degradation of halogenated compounds. In this report, we confirm for the first time that the Alcanivorax bacterium encodes a truly functional HLD named DadB. An activity assay with 46 halogenated substrates indicated that DadB possesses broad substrate range and has the highest overall activity among the identified HLDs. DadB prefers brominated substrates; chlorinated alkenes; and the C2-C3 substrates, including the persistent pollutants of 1,2-dichloroethane, 1,2-dichloropropane and 1,2,3-trichloropropane. As DadB displays no detectable activity toward long-chain haloalkanes such as 1-chlorohexadecane and 1-chlorooctadecane, the degradation of them in A. dieselolei B-5 might be attributed to other enzymes. Kinetic constants were determined with 6 substrates. DadB has highest affinity and largest kcat/Km value toward 1,3-dibromopropane (Km = 0.82 mM, kcat/Km = 16.43 mM?1·s?1). DadB aggregates fast in the buffers with pH≤7.0, while keeps stable in monomer form when pH≥7.5. According to homology modeling, DadB has an open active cavity with a large access tunnel, which is supposed important for larger molecules as opposed to C2-C3 substrates. Combined with the results for other HLDs, we deduce that residue I247 plays an important role in substrate selection. These results suggest that DadB and its host, A. dieselolei B-5, are of potential use for biocatalysis and bioremediation applications.
Enzymes and genes involved in aerobic alkane degradation
Wanpeng Wang,Zongze Shao
Frontiers in Microbiology , 2013, DOI: 10.3389/fmicb.2013.00116
Abstract: Alkanes are major constituents of crude oil. They are also present at low concentrations in diverse non-contaminated because many living organisms produce them as chemo-attractants or as protecting agents against water loss. Alkane degradation is a widespread phenomenon in nature. The numerous microorganisms, both prokaryotic and eukaryotic, capable of utilizing alkanes as a carbon and energy source, have been isolated and characterized. This review summarizes the current knowledge of how bacteria metabolize alkanes aerobically, with a particular emphasis on the oxidation of long-chain alkanes, including factors that are responsible for chemotaxis to alkanes, transport across cell membrane of alkanes, the regulation of alkane degradation gene and initial oxidation.
ON CRITICAL LENGTH OF PILE IN COMPOSITE FOUNDATION UNDER EMBANKMENT OF HIGHWAY
路堤下复合地基临界桩长探讨

Zhang Zhongkun,Li Haibin,Yin Zongze,Cao Zhengkang,
张忠坤
,李海斌,殷宗泽,曹正康

岩石力学与工程学报 , 2004,
Abstract: The definition and current study situation on critical length of pile in composite foundation are analyzed. By means of numerical analysis,the existence of critical length of pile in composite foundation under embankment of highway is revealed. Take the composite foundation at the section K102+990 of NingTong highway for example,the critical length of pile is studied by means of FEM and semi-analysis method.
REVIEW ON COAL ASH AND EPS USED AS FILLER OF ROAD EMBANKMENT
粉煤灰与EPS路堤研究综述

Zhang Zhongkun,Hou Xueyuan,Cao Zhengkang,Yin Zongze,
张忠坤
,候学渊,曹正康,殷宗泽

岩石力学与工程学报 , 2001,
Abstract: The current study on both coal ash and expanded polystyrene (EPS) used as the filler of road embankment to reduce settlement of road embankment is reviewed. The extensive geotechnical meaning of EPS application is pointed out.
TOLERANCE AND DEGRADATION OF THE EXOPHIALA ISOLATES TO CREOSOTE,PCP,COPPER NAPHTHENATE AND CCA-c
外瓶霉属真菌耐药性和降解能力的研究

Yuan Yl Chen Zongze Yin Qinyan Dai Bingli Wang Xuming,
袁毅 陈宗泽 殷勤燕 戴秉丽 王旭明 C.J.K
,Wang

菌物学报 , 1996,
Abstract: Exophiala isolates demonstrated high resistance to creosote and pentachlorophenol (PCP). Difference in the resistance of Exophiala isolates to creosote and PCP was evident. Exophiala isolates exhibited a wide range of tolerance to PCP. It is significant that Exophiala isolates were more tolerant than Poria placenta (Basidiomycete dacayer). Except P-3182, all other Exophiala isolates were similar to or a little more tolerant than Phialophora hetermorpha, but less tolerant than Rhinocladiella atrovirens, P-3182 was the most tolerant compared with the Exophiala isolates and reference fungi, its inhibition threshold was 49. 5ppm. The Exophiala isolates displayed a wide range of tolerance to creosote, too. These isolates were more resistant than P. placenta and Ph. hetermorpha, but less tolerant than Rh. atrovirens. Among the isolates, P -2830 (1.15%) was the most tolerant and P-3182 (0.88%) was the next. For the test of fungal growth in liquid culture with creosote and PCP, changes were obvious between 0 and 3 weeks. This result indicates that Exophiala isolates can degrade creosote, PCP and propagate within the tested concentration. Exophiala isolates exhibited high resistence to and can degrade creosote and PCP. There was good agreement among isolation frequency and the invasion of the poles by some microfungi appeared to precede the appearance of Basidiomycete decayer. To copper naphthenate and CCA - c, the Exophiala isolates were similar to or a littie more tolerant than reference fungi. The Exophiala isolates can not grow in liquid medium with CCA-c.
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