检索结果-南通市图书馆

Comparative study on pullout behaviour of pressure grouted soil nails from field and laboratory tests

Journal of Central South University 2013年第8期20卷 2285-2292页

作者： HONG Cheng-yu YIN Jian-hua pei hua-fu Department of Civil Engineering Shantou University Shantou 515063 China Department of Civil and Environmental Engineering The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong China

Pullout resistance of a soil nail is a critical parameter in design and analysis for geotechnical engineers. Due to the complexity of field conditions, the pullout behaviour of cement grouted soil nail in field is not well investigated. In this work, a number of field pullout tests of pressure grouted soil nails were conducted to estimate the pullout resistance of soil nails. The effective bond lengths of field soil nails were accurately controlled by a new grouting packer system. Typical field test results and the related comparison with typical laboratory test results reveal that the apparent coefficient of friction （ACF） decreases with the increase of overburden soil pressure when grouting pressure is constant, but increases almost linearly with the increase of grouting pressure when overburden pressure （soil depth） is unchanged. Water contents of soil samples at soil nail surfaces show obvious reductions compared with the results of soil samples from drillholes. After soil nails were completely pulled out of the ground, surface conditions of the soil nails and surrounding soil were examined. It is found that the water content values of the soil at the soil/nail interfaces decrease substantially compared with those of soil samples extracted from drillholes. In addition, all soil nails expand significantly in the diametrical direction after being pulled out of ground, indicating that the pressurized cement grout compacts the soil and penetrates into soil voids, leading to a corresponding shift of failure surface into surrounding soil mass significantly.

关键词： soil nail apparent coefficient of friction overburden soil pressure grouting pressure

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

Personalization for Massive Product Innovation Using Open Architecture

引用

Chinese Journal of Mechanical Engineering 2018年第2期31卷 12-24页

作者： Qing-Jin Peng Yun-Hui Liu Jian Zhang pei-hua Gu Department of Mechanical Engineering University of Manitoba Department of Mechatronics Engineering Shantou University

Product innovation is creation of new concepts to plan and realize technological and functional details in the product to satisfy market and customer needs. One of the key drivers to product innovation is reactions of the product to users’ needs. Product innovation needs a cognitive design method based on needs of variant users for the product personalization. In this paper, an open concept is introduced to provide ways to meet user’s individual need in product lifespan. It is for industries to propose product concepts based on open sources, develop and support the product on the public capability. Using the open concept in the product architecture, called open?architecture product(OAP), can improve the product personalization leading to massive product innovation. To promote this promise of the OAP, effective methods are discussed for the OAP development. This paper introduces research on OAPs using adaptable design methods to meet product personalization. Adaptable design is based on the modular structure for product adaptability using function modules and adaptable interfaces. The proposed method provides solutions for planning modules and implementation of OAPs. Methods of OAP module planning, detail and interface design are described for transformation of product concepts into physical structures. A multiple?purpose electrical car is developed in a case study to show effectiveness of the proposed method.

关键词： Product design Personalization Massive innovation Open architecture Adaptable design

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

Aerodynamic Analysis of a Localized Flexible Airfoil at Low Reynolds Numbers

引用

Communications in Computational Physics 2012年第4期11卷 1300-1310页

作者： Wei Kang Jia-Zhong Zhang pei-hua Feng School of Energy and Power Engineering Xi’an Jiaotong UniversityXi’an 710049ShaanxiChina

A localized flexible airfoil at low Reynolds numbers is modeled and the aerodynamic performance is analyzed *** characteristic based split scheme,a fluid solver for two dimensional incompressible Navier-Stokes equations is developed under the ALE framework,coupled with the theory of shallow arch,which is approximated by Galerkin ***,the interactions between the unsteady flow and the shallow arch are studied in *** particular,the effect of the selfexcited vibration of the structure on aerodynamic performance of the airfoil is investigated deeply at various angles of *** results show that the lift-to-drag ratio has been increased greatly compared with the rigid ***,the relationship between the self-excited vibration and the evolution of the flow is analyzed using FFT tools.

关键词： Fluid-structure interaction Navier-Stokes equations aerodynamic performance lift enhancement and drag reduction flow control

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

Investigation of Work Hardening Behavior of Inconel X-750 Alloy

引用

Acta Metallurgica Sinica(English Letters) 2017年第9期30卷 869-877页

作者： pei-Tao hua Wei-Hong Zhang Lin-Jie huan Wen-Ru Sun Superalloys Division Institute of Metal Research ChineseAcademy of Sciences 110016 Shenyang China University of Chinese Academy of Sciences 100049 BeijingChina

The constant strain rate uniaxial compression tests were conducted in this paper for studying the work hardening behavior and revealing the underlying microstructure evolution involved in the plastic response of the nickel-based Inconel X-750 alloy. The work hardening rate versus true strain plots of Inconel X-750 alloy resembled that of low-stacking-fault energy （SFE） alloys with distinct four stages. The dislocations were found in the planar arrangements at a strain of 0.1 located at the onset of stage II, and the dislocation density was increased and the planar arrangement configuration was partially destroyed at a strain of 0.36 located in stage III. It was unexpected that deformation twins were observed at a strain of 0.69 located in stage IV although the alloy has been classified into materials with a higher SFE value. The result is different with a similar study, in which the deformation twins were absent in Ni-Cr-based alloy Inconel 625 even when the strain was as high as 0.65. It was deemed that the low level of solution strengthening favored the deformation of matrix and the activation of slip system for twining in Inconel X-750 alloy. Unlike the low-SFE alloys that the twins were always formed at the end of stage Ⅰ, the higher SFE delayed the twin formation to stage IV for Inconel X-750 alloy. The well- developed planar dislocation configuration gave rise to the stage Ⅱ with a slightly decreasing rate, the collapse of planar dislocation arrangements caused the occurrence of stage Ⅲ with an accelerated decreasing rate, and the twin formation led to the stage IV with a nearly constant work hardening rate.

关键词： Inconei X-750 alloy Work hardening behavior Planar dislocation arrangement Deformationtwins

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

Response enhancement of olfactory sensory neurons-based biosensors for odorant detection

引用

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2009年第4期10卷 285-290页

作者： Chun-sheng WU pei-hua CHEN Qing YUAN Ping WANG Biosensor National Special Laboratory MOE Key Laboratory of Biomedical Engineering Department of Biomedical Engineering Zhejiang University Hangzhou 310027 China

This paper presents a novel strategy for the response enhancement of olfactory sensory neurons (OSNs)-based biosensors by monitoring the enhancive responses of OSNs to odorants. An OSNs-based biosensor was developed on the basis of the light addressable potentiometric sensor (LAPS), in which rat OSNs were cultured on the surface of LAPS chip and served as sensing elements. LY294002, the specific inhibitor of phosphatidylinositol 3-kinase (PI3K), was used to enhance the responses of OSNs to odorants. The responses of OSNs to odorants with and without the treatment of LY294002 were recorded by LAPS. The results show that the enhancive effect of LY294002 was recorded efficiently by LAPS and the responses of this OSNs-LAPS hybrid biosensor were enhanced by LY294002 by about 1.5-fold. We conclude that this method can enhance the responses of OSNs-LAPS hybrid biosensors, which may provide a novel strategy for the bioelectrical signal monitor of OSNs in biosensors. It is also suggested that this strategy may be applicable to other kinds of OSNs-based biosensors for cellular activity detection, such as microelectrode array (MEA) and field effect transistor (FET).

关键词： Olfactory sensory neurons (OSNs) Response enhancement Light addressable potentiometric sensor (LAPS) Olfactory-based biosensor

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

Development of a preliminary slope stability calculation method based on internal horizontal displacements

引用

Journal of Mountain Science 2018年第5期15卷 1129-1136页

作者： pei hua-fu ZHANG Si-qi BORANA Lalit YUAN Bing Department of Geotechnical Engineering Dalian University of Technology Dalian 116024 China Department of Civil Engineering Indian Institute of Technology Indore Indore 453552 India. Shenzhen Graduate school Harbin Institute of Technology Shenzhen 518055 China

This paper proposes a horizontal displacement-based approach to determine the potential slip surface of the slope. Firstly, a group of in-situ inclinometers with an appropriate spacing in the horizontal direction is located in the model *** equation of horizontal displacement with time for each in-situ inclinometer is fitted during the whole simulation process. Furthermore, the intersection of each inclinometer with potential slip surface is determined by using an optimization model. The slip surface can be obtained by using least square fitting method. Finally, the feasibility and accuracy of the method are validated by a series of numerical simulations. It is noted that the optimization model taking the maximum value of displacement increment gradient as an objective has higher accuracy when compared with other optimization models. This method employed in this study provides a preliminary approach to determine the real-time slope stability based on displacement, which can also be measured by using conventional instruments on site.

关键词： Slip surface Slope stability analysis Optimization model Numerical simulation Displacement.

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

Study on disulfur-backboned nucleic acids:Part Ⅳ.Efficient synthesis of 3',5'-dithio-2'-deoxyguanosine

引用

Chinese Chemical Letters 2010年第2期21卷 131-134页

作者： pei hua Shang Chang Mei Cheng hua Wang Hong Chao Zheng Yu Fen Zhao Key Laboratory of Phosphorus and Chemical Biology the Ministry of EducationDepartment of ChemistryTsinghua UniversityBeijing 10084China

An efficient and novel method for synthesizing 3′,5′-dithio-2′-deoxyguanosine was *** this method normal guanosine was used as the starting material.A very efficient procedure was used to synthesize 2-O-tosylguanosine 1,which used 0.1 *** instead of 2 eq.1 was treated with LTBH to give 9-(2-deoxy-β-D-threo-pentofuranosyl)guanine 2.2 could be easily turned to the target compound.

关键词： 3′,5′-Dithio-2′-deoxyguanosine Guanosine Synthesis

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

Determination of vanadyl sulfate ion-pair dissociation constant at 298.15 K by Fuoss method

引用

Rare Metals 2015年第12期34卷 873-876页

作者： Shu-Di Zhang pei-hua Ma Yu-Chun Zhai Wei-Min Chen School of Materials and Metallurgy Northeastern University School of Environmental and Chemical Engineering Shenyang Ligong University

Vanadium battery has fast and large capacity charge and discharge characteristics, and the concentration and stability of the battery electrolyte are the key to the electrolyte performance. In actual, with higher acidity and higher concentration of the vanadium battery electrolyte, the ion-pair is dominant. The ion-pair dissociation constant is one of the important thermodynamic data related to battery performance. The vanadyl sulfate conductivity in aqueous solution was determined using the conductance method at 298.15K. Using the origin data fitting, the limiting molar conductance is obtained, and then by the improved Ostwald dilution law and the Davies equation, the activity coefficient is solved so as to obtain the ionic strength of the true solution. Using the Fuoss method, the dissociation constant of vanadyl sulfate ion-pair was calculated. At last, the vanadyl sulfate limiting molar conductance (Λ 0 ) is 174.8251748 S·dm2·mol?1, and the vanadyl sulfate ion-pair dissociation constant K d is 0.002636367, and then other thermodynamic properties can be studied.

关键词： Fuoss method Conductance method Dissociation constant Vanadium battery Vanadyl sulfate Aqueous solution

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

Simulation study of energy resolution with changing pixel size for radon monitor based on Topmetal-Ⅱ^- TPC

引用

Nuclear Science and Techniques 2019年第1期30卷 49-57页

作者： Meng-Yao huang hua pei Xiang-Ming Sun Shu-Guang Zou Department of Physics and Astronomy Iowa State University PLAC Key Laboratory of Quark & Lepton Physics (MOE)Central China Normal University College of Information Science and Engineering Henan University of Technology

In this paper, we study how pixel size influences energy resolution for a proposed pixelated detector—a high sensitivity, low cost, and real-time radon monitor based on a Topmetal-Ⅱ^- time projection chamber(TPC). This monitor was designed to improve spatial resolution for detecting radon alpha particles using Topmetal-Ⅱ^- sensors assembled by a 0.35 lm CMOS integrated circuit *** to concerns that small pixel size might have the side effect of worsening energy resolution due to lower signalto-noise ratio, a Geant4-based simulation was used to investigate the dependence of energy resolution on pixel sizes ranging from 60 to 600 lm. A non-monotonic trend in this region shows the combined effect of pixel size and threshold on pixels, analyzed by introducing an empirical expression. Pixel noise contributes 50 keV full-width at half-maximum energy resolution for 400 lm pixel size at 1–4σ threshold that is comparable to the energy resolution caused by energy fluctuations in the TPC ionization process( ~20 keV). The total energy resolution after combining both factors is estimated to be 54 keV for a pixel size of 400 lm at 1–4σ threshold. The analysis presented in this paper would help choosing suitable pixel size for future pixelated detectors.

关键词： Geant4 Energy resolution Pixel size Radon monitor Topmetal

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

Microfluidic assisted 90%loading CL-20 spherical particles:Enhancing self-sustaining combustion performance

引用

Defence Technology（防务技术） 2023年第4期22卷 176-184页

作者： Ling-feng Yang Xian-rui Shi Chun-zhi Li Bo Wu Chong-hua pei State Key Laboratory of Environment-friendly Energy Materials Southwest University of Science and TechnologyMianyang621010PR China Xi'an Modern Chemistry Research Institute Xi'anShaanxi710065PR China Luzhou North Chemical Industries Co. Ltd.Luzhou646003PR China

The performance of the chemical fuel determines the altitude,range and longevity of spacecraft in air and space *** alternatives(e.g.,hypergolic ionic liquids or high-energy composites)with high-energy density,heat of formation and fast initial rate are considered as potential chemical *** the high-energy density material,hexanitrohexaazaisowurtzitane(CL-20)often serves as secondary explosive with poor self-propagating combustion ***,90%loading CL-20 microspheres with uniform particle sizes are precisely prepared by microfluid method,which exhibit unique hierarchical *** morphology,thermal behaviors,as well as combustion performance were further *** results demonstrated that as-prepared spherical particles exhibit prominent thermal compatibility,and the enhanced self-sustaining combustion *** work provides an efficient method achieving the uniform high-energy density particles with excellent self-sustaining combustion performance.

关键词： Microfluidics Hexanitrohexaazaisowurtzitane Spherical particles Thermal behavior Self-sustaining combustion

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：