检索结果-南通市图书馆

Unsaturated Creep Behaviors of Weak Intercalated Soils in Soft Rock of Badong Formation

Journal of Mountain Science 2015年第6期12卷 1460-1470页

作者： zhu yan-Bo YU Hong-Ming College of Geology Engineering and Geomatics Chang'an University Faculty of Engineering China University of Geosciences

The cutting slopes in soft rock of redbed appeared in Yichang-Badong highway often suffer from the instability along weak intercalations, so the creep behaviors of weak intercalated soils are crucially important for the stability of cutting slopes. Because the deformation of weak intercalated soils is significantly affected by water content due to the strong water sensitivity, it is necessary to study the influence of matric suction on the creep behaviors of weak intercalated soils. In order to find out the unsaturated creep characters of weak intercalated soils, a GDS unsaturated triaxial apparatus was used. Then the triaxial creep experiments on weak intercalated soil samples under varying matric suction were conducted to obtain the unsaturated creep curves. The results show that the weak intercalated soils have obvious creep behaviors, and the creep strain is in nonlinear relationship with stress and time. When the matric suction is constant, a larger deviator stress will lead to a larger creep strain; When the deviator stress is constant, a smaller matric suction will lead to a larger creep strain. Based on the Mesri creep model, an improved creep model for weak intercalated soils under varying matric suction was established, in which the relationship of stress-strain was expressed with a hyperbolic function, and the relationship of strain-time was expressed with power functions in stages. Then an unsaturated creep model including stress-matric suction-strain-time for weak intercalated soils was established based on the power function relationship between matric suction and Ed(a parameter of the improved creep model). The comparison of the calculated values of creep model and the experimental values shows that the creep behaviors of weak intercalated soils can be predicted by the unsaturated creep model by and large.

关键词： Badong formation Weak intercalated soils Unsaturated creep behaviors Soil triaxial apparatus Creep model

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Experimental,numerical and sensitive analysis of nitrogen dynamics in soils irrigated with treated sewage

引用

Science China(Technological Sciences) 2009年第11期52卷 3279-3286页

作者： zhu yan yanG JinZhong WANG LiYing State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan UniversityWuhan 430072China

An ammonia volatilization submodel and a crop-growth submodel have been set up and incorporated to the 2D nitrogen transport and transformation simulation model Nitrogen-2D. The coupled model Nitrogen-2D considers all the important nitrogen transformation processes such as mineralization, immobilization, denitrification, nitrification, volatilization, root uptake and soil adsorption in the soil. The model was used to simulate the nitrogen dynamics for the experiment in four lysimeters under sewage irrigation. Simulation results show that the model can describe the water content and ammonium nitrogen content distribution well but simulate the change of the nitrate nitrogen poorly. Sensitivity analysis shows that the simulation results are influenced by the soil water characteristic parameters severely, especially by the parameter of n. The model is much less sensitive to N dynamic parameters.

关键词： Nitrogen-2D nitrogen transformation and transport ammonia volatilization crop-growth model sensitivity analysis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

On Hilbert Coefficients of Filtrations

引用

Chinese Annals of Mathematics,Series B 2007年第5期28卷 543-554页

作者： yan GU Guangjun zhu Zhongming TANG Department of Mathematics Suzhou University Suzhou 215006 Jiangsu China.

Let F be a Hilbert filtration with respect to a Cohen-Macaulay module M. When G（F, M） and FK（F,M） have almost maximal depths, the Hilbert coefficients gi（F, M） is calculated. In the general case, an upper bound ... 详细信息

关键词： Hilbert coefficients Fiber cones Depth

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Correlation between Chinese Medicine Constitution and Skin Types: A Study on 187 Japanese Women

引用

Chinese Journal of Integrative Medicine 2020年第3期26卷 174-179页

作者： Seika Kanezawa zhu yan-bo WANG Qi BHY Corporation Limited Shibuya-kuTokyo151-0063Japan School of Management Beijing University of Chinese MedicineBeijing100029China Center for Studies in Constitution Research of Traditional Chinese Medicine School of Basic MedicineBeijing University of Chinese MedicineBeijing100029China

Objective:Chinese medicine(CM)is widely applied in cosmetics and *** theory of CM believes that skin characterizations reflect the internal status of balanee which can be represented by body con stitution,but relevant studies are *** study aims to analyze the relation ship betwee n body constitution of CM and skin ***:Participants were recruited from a private health and beauty clinic in Tokyo,Japan from June 2013 to January *** participant was assessed using Constitution in Chinese Medicine Questionnaire(CCMQ)for body constitution and the Baumann Skin Type Questionnaire for skin ***'s rank correlation and stepwise multiple linear regression were used to investigate the effect of body constitutions on skin ***:A total of 187 Japanese females were recruited in this *** dampness-heat and phlegm-dampness scores were associated with oilier skin while higher qi-depression and blood-stasis were associated with drier *** score in Inherited Special and yin-deficiency constitutions tended to have more sensitive skin,and higher score in blood-stasis was associated with more pigmented skin and ***:Our findings supported the"Constitution-Skin Correlated theory"in *** of the association between skin conditions and the body constitutions might be helpful to explore more individualized treatment options for skin care and dermatological diseases through modifications of the unique body constitutions using CM modalities.

关键词： Chinese medicine constitution in Chinese medicine Baumann Skin Type constitution-skin correlated theory

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The Impact of Top Management Team Process on Corporate Social Responsibility and Firm Performance

引用

Frontiers of Business Research in China 2013年第2期7卷 268-288页

作者： yan zhu School of Management Macao University of Science and Technology Macao China

This article aims to explore how top management team （TMT） process affects strategic corporate social responsibility （CSR）, and in turn, how strategic CSR influences firm performance. In addition, this article examines whether CSR mediates the relationship between TMT process and firm performance. The sample consists of 203 hotels from the tourism and hospitality industry in the southeast China. TMT processes assessed are communication and cohesion. Results indicate that （1） corporate social responsibility is positively related to firm performance, （2） top management team process （communication and cohesion） is positively related to corporate social responsibility, and （3） corporate social responsibility fully mediates the relationship between top management team process and firm performance. Results highlight upper echelons mechanisms that underpin the TMT process-firm performance relationship. This study contributes to understanding how TMT process affects firm performance both directly and indirectly, through strategic CSR.

关键词： upper echelons theory top management team process corporatesocial responsibility communication cohesion

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

An interpretation of the imagery symbol of the Panopticon in The Eye in the Door

引用

Language and Semiotic Studies 2023年第3期9卷 381-392页

作者： yan zhu School of Foreign Languages Soochow University Suzhou 215006 China

The Eye in the Door is one of the masterpieces of Pat Barker,a famous contemporary British female *** this novel the image of the Panopticon stands out because ofits high frequency and detailed descriptions,and it also becomes the key to the interpretation of the novel because of its relation to the fates of many characters and its metaphorical *** the perspective of semiotics,this paper makes a progressive interpretation of this imagery symbol from three aspects:the features of the Panopticon in the surface sense,the surveillance function and power mechanism of the Panopticon in the deeper sense,and the Panopticon as the metaphor of the British society during the First World War in the social and cultural sense,then points out that the imagery symbol of the Panopticon is the encoding and embodiment of the writer's *** this imagery symbol,the writer criticizes the disciplinary characteristics and totalitarian tendency of the British society during the First World War and expresses her reflection on the First World War and its causes.

关键词： disciplinary society imagery symbol Pat Barker The Eye in the Door the Panopticon

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Verifiable random functions with Boolean function constraints

引用

Science China(Information Sciences) 2018年第3期61卷 243-245页

作者： Qianwen WANG Rongquan FENG yan zhu School of Mathematical Sciences Peking University School of Computer and Communication Engineering University of Science and Technology Beijing

Dear editor,Verifiable random functions(VRFs)[1]are cryptographic functions that behaves like a random function for producing a random string y for any variant x,but also allows for efficient verification of uniqueness of y for a valid witness *** this work,we extend the concept of VRFs to a notion of a conditionally verifiable random function

关键词： VRF Verifiable random functions with Boolean function constraints

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Two-dimensional Nitrogen-doped Mesoporous Carbon/Graphene Nanocomposites from the Self-assembly of Block Copolymer Micelles in Solution

引用

Chinese Journal of Polymer Science 2018年第3期36卷 266-272页

作者： Nan Wang Hao Tian Shu-yan zhu De-Yue yan Yi-Yong Mai School of Chemistry and Chemical Engineering Shanghai Key Laboratory of Electrical Insulation and Thermal AgeingShanghai Jiao Tong University Shanghai 200240China

The self-assembly of block copolymer in solution has proven to be an effective strategy for building up a wide range of nanomaterials with diverse structures and *** paper reports a facile self-assembly approach towards two-dimensional(2D)sandwich-like mesoporous nitrogen-doped carbon/reduced graphene oxide nanocomposites(denoted as mNC/rGO)with well-defined large *** strategy involves the synergistic self-assembly ofpolystyrene-block-poly(ethylene oxide)(PS-b-PEO)spherical micelles,m-phenylenediamine(mPD)monomers and GO in solution and the subsequent carbonization at 900~*** resultant mNC/rGO nanosheets have an average pore size of 19 nm,a high specific surface of 812 m^(2)'g^(-1)and a nitrogen content of 2.2 wt%.As an oxygen reduction reaction(ORR)catalyst,the unique structural features render the metal-free nanosheets excellent electrocatalytic *** a 0.1 mol.L-~KOH alkaline medium,mNC/rGO exhibits a four-electron transfer pathway with a high half-wave-potential(El/2)of+0.77 V versus reversible hydrogen electrode(RHE)and a limiting current density(JL)of 5.2 mA'cm^(-2),which are well comparable with those of the commercial Pt/C catalysts.

关键词： Block copolymer Self-assembly 2D materials Mesoporous carbon ORR

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A novel composite stationary phase composed of polystyrene/divinybenzene beads and quaternized nanodiamond for anion exchange chromatography

引用

Chinese Chemical Letters 2019年第2期30卷 465-469页

作者： Peng Yao Zhongping Huang Qiulian zhu Zuoyi zhu Lili Wang yan zhu College of Chemical Engineering Zhejiang University of Technology Institute of Quality and Standard for Agricultural Products Zhejiang Academy of Agricultural Science Department of Chemistry Zhejiang University

An approach for preparation of a novel composite anion exchanger composed of polystyrene/divinylbenzene (PS/DVB) beads and quaternized nanodiamods (QND) were proposed. Oxidized nanodiamonds (OND) were quaternized by the condensation polymerization between methylamine (MA) and 1,4-butanediol diglycidyl ether (BDDE), which were characterized by Fourier transform infrared (FTIR) spectra, X-ray phtoelectron spectroscopy (XPS), thermogravimetric analysis (TGA). QND with layers of cationic polyelectrolyte was attached onto the surface of sulfonated PS/DVB beads electrostatically. Subsequently, hyperbranched reaction of QND agglomerated on the PS/DVB bead surface was performed by the alternate reaction between MA and BDDE to increase the exchange capacity. The composite anion exchanger showed good stability in organic solvent and a wide pH *** surface of these microspheres was characterized by scanning electron microscopy. In addition, ion exchange selectivity and separation efficiency of the anion exchangers were assessed using the mixtures of anions (F,Cl,NO_2,Br,NO_3,HPO_4~2 and SO_4~2) with carbonate/bicarbonate as eluent, and the anion exchanger with high exchange capacity could be used to analyze chloride in aqueous solution with high concentration of fluoride. This work explores the potential of nanodiamods as an agglomerated material for ion chromatography stationary phases for the separation of inorganic anions.

关键词： Quaternized nanodiamonds Ion chromatography Polystyrene/divinylbenzene Hyperbranched Anion exchangers

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A two-stage amplifier of laser eavesdropping model based on waveguide fiber taper

引用

Defence Technology（防务技术） 2019年第1期15卷 95-97页

作者： Mei-ting Wang yan zhu Yi-ning Mu School of Science Changchun University of Science and Technology

In order to improve ability of amplification about optical arrival angle in laser eavesdropping system, and enhance receiving field of view (FOV) of laser eavesdropping system, this paper presents a new multistage amplifier laser eavesdropping model based on waveguide fiber taper. First of all, taking about four-quadrant (4QD) laser eavesdropping model as an example, from the theoretical view, analyses factors that, currently, laser eavesdropping system face many restrictive factors during practical applications. Besides, from the receiving FOV and ability of amplification about arrival angle of incoming optical axis angles, systematically analyses advantages of multi-stage amplifier model. What’s more,through constructing laser eavesdropping test platform, we demonstrate Signal to Noise Ratio(SNR) of two stage amplification model is eventually promoted to 6-10 dB compared with one amplifying model,especially in low and high audio level, the advantages is more obvious.

关键词： Laser eavesdropping Waveguide fiber taper 4QD

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：