期刊文献+
共找到16篇文章
< 1 >
每页显示 20 50 100
WEAK-STRONG UNIQUENESS FOR THREE DIMENSIONAL INCOMPRESSIBLE ACTIVE LIQUID CRYSTALS
1
作者 Fan YANG Congming LI 《Acta Mathematica Scientia》 SCIE CSCD 2024年第4期1415-1440,共26页
The hydrodynamics of active liquid crystal models has attracted much attention in recent years due to many applications of these models.In this paper,we study the weak-strong uniqueness for the Leray-Hopf type weak so... The hydrodynamics of active liquid crystal models has attracted much attention in recent years due to many applications of these models.In this paper,we study the weak-strong uniqueness for the Leray-Hopf type weak solutions to the incompressible active liquid crystals in R^(3).Our results yield that if there exists a strong solution,then it is unique among the Leray-Hopf type weak solutions associated with the same initial data. 展开更多
关键词 analysis of parabolic and elliptic types weak-strong uniqueness active liquid crystals weak solution energy equality
下载PDF
Fault Type Analysis along the San Andreas Fault Zone: A Numerical Approach 被引量:1
2
作者 Matrika Prasad KOIRALA Daigoro HAYASHI 《Journal of Mountain Science》 SCIE CSCD 2010年第1期36-44,共9页
Finite Element (FE) modeling under plane stress condition is used to analyze the fault type variation with depth along and around the San Andreas Fault (SAF) zone. In this simulation elastic rheology was used and was ... Finite Element (FE) modeling under plane stress condition is used to analyze the fault type variation with depth along and around the San Andreas Fault (SAF) zone. In this simulation elastic rheology was used and was thought justifiable as the variation in depth from 0.5 km to 20 km was considered. Series of calculations were performed with the variation in domain properties. Three types of models were created based on simple geological map of California, namely, 1) single domain model considering whole California as one homogeneous domain, 2) three domains model including the North American plate, Pacific plate, and SAF zone as separate domains, and 3) Four domains model including the three above plus the Garlock Fault zone. Mohr-Coulomb failure criterion and Byerlee's law were used for the calculation of failure state. All the models were driven by displacement boundary condition imposing the fixed North American plate and Pacific plate motion along N34°W vector up to the northern terminus of SAF and N50°E vector motion for the subducting the Gorda and Juan de Fuca plates. Our simulated results revealed that as the depth increased, the fault types were generally normal, and at shallow depth greater strike slip and some thrust faults were formed. It is concluded that SAF may be terminated as normal fault at depth although the surface expression is clearly strike slip. 展开更多
关键词 Finite Element modeling plane stress fault type analysis San Andreas Fault zone rockdomain properties failure analysis
下载PDF
Experimental and numerical analysis of secondary disasters induced by oxygen rich combustion within a tunnel 被引量:2
3
作者 Cheng Caixia Sun Fuchun +2 位作者 Zhou Xinquan Niu Huiyong Liang De 《Mining Science and Technology》 EI CAS 2011年第6期897-901,共5页
Various physical parameters, including gas concentrations (O2, CO, CH4, and H2) and temperatures at dif- ferent air velocities, were determined for full scale wood fires in the Chongqing Coal Research Institute fire t... Various physical parameters, including gas concentrations (O2, CO, CH4, and H2) and temperatures at dif- ferent air velocities, were determined for full scale wood fires in the Chongqing Coal Research Institute fire test tunnel. Both experimental measurements and numerical simulations are discussed. The numer- ical analysis was performed with the computational fluid dynamics software package ''FLUENT''. The results show that the experimental data agree with the simulation results. The results verify that Roberts' theory of burning is correct. They also prove that the air velocity is the key factor that determines the type of combustion. Also, it is shown that secondary disasters are unlikely for oxygen rich combustion with a limited fire load. 展开更多
关键词 Numerical analysis Combustion type Oxygen-enriched combustion Secondary disasters
下载PDF
DYNAMIC BEHAVIOR ANALYSIS FOR LANDING-GEAR WITH DIFFERENT TYPES OF DUAL-CHAMBER SHOCK-STRUTS 被引量:10
4
作者 Nie Hong Qiao Xin +1 位作者 Gao Zejun Zhou Lanqin 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 1991年第2期235-244,共10页
In this paper three types of dual- chamber shock- struts are considered in dynamic analyses of landing-gear behavior during impact and taxi. Their dynamic characteristics are compared with each other according to calc... In this paper three types of dual- chamber shock- struts are considered in dynamic analyses of landing-gear behavior during impact and taxi. Their dynamic characteristics are compared with each other according to calculation results, and some conclusions are presented.It is very helpful for selecting a suitable type of dual-chamber shock-strut in landing-gear design. 展开更多
关键词 DYNAMIC BEHAVIOR analysis FOR LANDING-GEAR WITH DIFFERENT TYPES OF DUAL-CHAMBER SHOCK-STRUTS
下载PDF
Pressure Buildup Analysis Using Type Curves for a Well in a Pressure-Maintained System
5
作者 林加恩 杨慧珠 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2007年第1期6-11,共6页
The development and application of a new solution is demonstrated for the type-curve analysis and in-terpretation of well test data from a multiwell reservoir system of both production and injection wells with two-pha... The development and application of a new solution is demonstrated for the type-curve analysis and in-terpretation of well test data from a multiwell reservoir system of both production and injection wells with two-phase flow. The buildup type curves or buildup behavior could be obtained through the solution by using su-perposition. But a new outer boundary condition for variable pressure boundary must be introduced to obtain the correct pressure buildup solutions by superposition. A technique is shown to determine the deviation time from the infinite-acting semilog radial flow stabilization in the derivatives of pressure, which is calculated with respect to and plotted vs. shut-in time. Field examples are given to illustrate the use of the proposed method for analyzing transient pressure data from a well located in a multi-well water-injection reservoir. An adaptive genetic algorithm-based method is used to match the pressure and pressure derivative data to estimate reservoir parameters. The validity and applicability of the proposed method are also demonstrated through the examples. 展开更多
关键词 multi-well reservoir pressure buildup two-phase flow type curve analysis
下载PDF
A Spectral Analysis of 155 Seyfert 1 Type AGN
6
作者 Stefanie Komossa 《天文研究与技术》 CSCD 北大核心 2003年第S1期42-45,共4页
We present the results of optical spectral analysis of a sample of 155 bright X ray selected ROSAT Seyfert 1 type AGN. We measured emission line properties by performing multi component fits to the emission line profi... We present the results of optical spectral analysis of a sample of 155 bright X ray selected ROSAT Seyfert 1 type AGN. We measured emission line properties by performing multi component fits to the emission line profiles, covering the effect of blended iron emission. We also obtained continuum parameters, including 250eV X ray luminosities derived from the ROSAT database. The measured properties are gathered for correlation analysis. Strong correlations between Hβ redshift, flux ratios of Fe Ⅱ to Hβ broad component and to Hβ narrow component are found. The observed trends are most likely driven by the Eddington ratio. 展开更多
关键词 A Spectral analysis of 155 Seyfert 1 Type AGN BSC FWHM RASS
下载PDF
Phylogenetic analysis of the genomes of two strains of human adenovirus type 3
7
作者 RONG ZHOU XIAO BO SU +6 位作者 QI WEI ZHANG QI YI ZENG BING ZHU CHU YU ZHANG HOE BO WU ZAO HE WU SI TANG GONG 《Journal of Microbiology and Immunology》 2007年第2期139-143,共5页
Human adenovirus type 3 (HAdV-3) is widely prevalent all over the world, especially in Asia. The objective of this study is to carry out complete genomic DNA sequencing and the phylogenetic analysis for two strains ... Human adenovirus type 3 (HAdV-3) is widely prevalent all over the world, especially in Asia. The objective of this study is to carry out complete genomic DNA sequencing and the phylogenetic analysis for two strains (Guangzhou01 and Guangzhou02) of HAdV-3 wild virus isolated from South China. Nasopharyngeal secretion aspirate specimens of sick children were inoculated into HEp-2 and HeLa culture tubes, and the cultures were identified by neutralization assay with type-specific reference rabbit antiserum. Type-specific primers were also utilized to confirm the serotype. The restriction fragments of HAdV genome DNA were cloned into pBlueScript SK ( + ) vectors and sequenced, and the 5' and 3' ends of the linear HAdV-3 genome were directly sequenced with double purified genomic DNA as templates. General features of the HAdV-3 genome sequences were explored by using several bio-software. Phylogenetic analysis was done with MEGA 3.0 software. The genomic sequences of Guangzhou01 and Guangzhou02 possess the same 4 early regions and 5 late regions and have 39 coding sequences and two RNA coding sequences. Other non-coding regions are conservative. Inverted repeats and palindromes were identified in the genome sequences. The genomes of group B human adenovirus as well as HAdV-3 have close phylogenetic relationship with that of chimpanzee adenovirus type 21. The genomic lengths of these two isolated strains are 35 273 bp and 35 269 bp, respectively. The phylogenetic analysis showed that HAdV-B species has some relationship with certain types of chimpanzee adenovirus. 展开更多
关键词 Human adenovirus type 3 Genome Phylogenetic analysis
下载PDF
Molecular Cloning and Expression Analysis of a Cys2/His2 Type Zinc Finger Protein Gene in Upland Cotton
8
作者 YANG Yu-wen,NI Wan-chao,ZHANG Bao-long,SHEN Xin-lian(Jiangsu Academy of Agriculture Sciences,48 Zhonglinjie Street,Nanjing,Jiangsu 210014,China) 《棉花学报》 CSCD 北大核心 2008年第S1期73-,共1页
The zinc finger proteins belong to the largest family of transcription factors.But there is little research of Cys2/His2 type zinc finger proteins in cotton,and there is no submission of correlating
关键词 CYS Molecular Cloning and Expression analysis of a Cys2/His2 Type Zinc Finger Protein Gene in Upland Cotton
下载PDF
Acoustic emission assessment of interface cracking in thermal barrier coatings 被引量:6
9
作者 Li Yang Zhi-Chun Zhong +4 位作者 Yi-Chun Zhou Wang Zhu Zhi-Biao Zhang Can-Ying Cai Chun-Sheng Lu 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2016年第2期342-348,共7页
In this paper,acoustic emission(AE) and digital image correlation methods were applied to monitor interface cracking in thermal barrier coatings under compression.The interface failure process can be identifie via i... In this paper,acoustic emission(AE) and digital image correlation methods were applied to monitor interface cracking in thermal barrier coatings under compression.The interface failure process can be identifie via its AE features,including buckling,delamination incubation and spallation.According to the Fourier transformation of AE signals,there arefourdifferentfailuremodes:surfaceverticalcracks,opening and sliding interface cracks,and substrate deformation.The characteristic frequency of AE signals from surface vertical cracks is 0.21 MHz,whilst that of the two types of interface cracks are 0.43 and 0.29 MHz,respectively.The energy released of the two types of interface cracks are 0.43 and 0.29 MHz,respectively.Based on the energy released from cracking and the AE signals,a relationship is established between the interface crack length and AE parameters,which is in good agreement with experimental results. 展开更多
关键词 Thermal barrier coatings Acoustic emission Interface cracking Crack type Quantitative analysis
下载PDF
A comparative study on crash-influencing factors by facility types on urban expressway 被引量:4
10
作者 Yong Wu Hideki Nakamura Miho Asano 《Journal of Modern Transportation》 2013年第4期224-235,共12页
This study aims at identifying crash-influencing factors by facility type of Nagoya Urban Expressway, considering the interaction of geometry, traffic flow, and ambient conditions. Crash rate (CR) model is firstly d... This study aims at identifying crash-influencing factors by facility type of Nagoya Urban Expressway, considering the interaction of geometry, traffic flow, and ambient conditions. Crash rate (CR) model is firstly developed separately at four facility types: basic, merge, and diverge segments and sharp curve. Traffic flows are thereby categorized, and based on the traffic categories, the significances of factors affecting crashes are analyzed by principal component analysis. The results reveal that, the CR at merge segment is significantly higher than those at basic and diverge segments in uncongested flow, while the value is not significantly different at the three facility types in congested flow. In both un- and congested flows, sharp curve has the worst safety performance in view of its highest CR. Regarding influencing factors, geometric design and traffic flow are most significant in un- and congested flows, respectively. As mainline flow increases, the effect of merging ratio affecting crash is on the rise at basic and merge segments as opposed to the decreasing significance of diverging ratio at diverge segment. Mean- while, longer acceleration and deceleration lanes are adverse to safety in uncongested flow, while shorter acceleration and deceleration lanes are adverse in congested flow. Due to its special geometric design, crashes at sharp curve are highly associated with the large centrifugal force and heavy restricted visibility. 展开更多
关键词 Crash-influencing factors Crash rates Principal component analysis - Facility types Urbanexpressway
下载PDF
Quantitative analysis of urinary endogenous markers for the treatment effect of Radix Scutellariae on type 2 diabetes rats 被引量:3
11
作者 Guang-Yue Hou Li-Hui Men +4 位作者 Lu Wang Zhong Zheng Zhi-Qiang Liu Feng-Rui Song Zhong-Ying Liu 《Chinese Chemical Letters》 SCIE CAS CSCD 2017年第6期1214-1219,共6页
The effect of Radix Scutellariae treated on type 2 diabetic rats has been investigated by a liquid chromatography coupled with tandem mass spectrometry(LC-MS/MS) based urinary quantitative approach.In this research,... The effect of Radix Scutellariae treated on type 2 diabetic rats has been investigated by a liquid chromatography coupled with tandem mass spectrometry(LC-MS/MS) based urinary quantitative approach.In this research,multiple reactions monitoring mode of MS/MS in LC-MS/MS analysis was used to quantitatively analyze the concentrations of 7 endogenous compounds in urine of normal control group,type 2 diabetic model group and Radix Scutellariae-treated group,and multivariate statistical analysis was utilized for MS data processing.The above-mentioned three groups can be distinguished via pattern recognition.The obtained results indicated that Radix Scutellariae affect the urinary metabolic profiling of type 2 diabetic rats on the polyol pathway,protein glycation reaction and amino acids metabolism pathway.According to these results,Radix Scutellariae should have the pharmacological effect on preventing or delaying the onset and progression of diabetes and its complications. 展开更多
关键词 LC-MS/MS Endogenous markers Multivariate statistical analysis Type 2 diabetic complications Radix Scutellariae
原文传递
Qualitative Analysis of Van der Pol Type Equation with Periodic Forcing Term
12
作者 郑志明 《Acta Mathematica Sinica,English Series》 SCIE CSCD 1990年第3期243-256,共14页
In this paper we analyze the qualitative behaviour of the equation ε+q(X) +εX=bp(t), where e is a small parameter.We divide the interval of parameter b into four sets of subintervals,A, B,C and D.For bA,B or D,we di... In this paper we analyze the qualitative behaviour of the equation ε+q(X) +εX=bp(t), where e is a small parameter.We divide the interval of parameter b into four sets of subintervals,A, B,C and D.For bA,B or D,we discuss the different structures of the attractors of the equation and their stabilities.When chaotic phenomena appear,we also estimate the entropy.For bC,the set of bifurcation intervals,we analyze the bifurcating type and get a series of consequences from the results of Newhouse and Palis. 展开更多
关键词 PR Qualitative analysis of Van der Pol Type Equation with Periodic Forcing Term der
原文传递
Fault Location and Classification for Distribution Systems Based on Deep Graph Learning Methods 被引量:1
13
作者 Jiaxiang Hu Weihao Hu +5 位作者 Jianjun Chen Di Cao Zhengyuan Zhang Zhou Liu Zhe Chen Frede Blaabjerg 《Journal of Modern Power Systems and Clean Energy》 SCIE EI CSCD 2023年第1期35-51,共17页
Accurate and timely fault diagnosis is of great significance for the safe operation and power supply reliability of distribution systems.However,traditional intelligent methods limit the use of the physical structures... Accurate and timely fault diagnosis is of great significance for the safe operation and power supply reliability of distribution systems.However,traditional intelligent methods limit the use of the physical structures and data information of power networks.To this end,this study proposes a fault diagnostic model for distribution systems based on deep graph learning.This model considers the physical structure of the power network as a significant constraint during model training,which endows the model with stronger information perception to resist abnormal data input and unknown application conditions.In addition,a special spatiotemporal convolutional block is utilized to enhance the waveform feature extraction ability.This enables the proposed fault diagnostic model to be more effective in dealing with both fault waveform changes and the spatial effects of faults.In addition,a multi-task learning framework is constructed for fault location and fault type analysis,which improves the performance and generalization ability of the model.The IEEE 33-bus and IEEE 37-bus test systems are modeled to verify the effectiveness of the proposed fault diagnostic model.Finally,different fault conditions,topological changes,and interference factors are considered to evaluate the anti-interference and generalization performance of the proposed model.Experimental results demonstrate that the proposed model outperforms other state-of-the-art methods. 展开更多
关键词 Fault diagnosis fault location fault type analysis distribution system deep graph learning multi-task learning
原文传递
A study on the condition of temporary housing following disasters: Focus on container housing
14
作者 Yan Hong 《Frontiers of Architectural Research》 CSCD 2017年第3期374-383,共10页
This study conducts an investigation on temporary housing in disaster areas and a survey on the condition of containers used as buildings. The construction of temporary housings in disaster areas using containers is p... This study conducts an investigation on temporary housing in disaster areas and a survey on the condition of containers used as buildings. The construction of temporary housings in disaster areas using containers is proposed as an application solution. With its advantage of combination and splitting, the modularity of containers offers a wide range of implementation possibilities for container housing in disaster areas. Specific housing needs of various types of victims can be easily satisfied through the different organizations of various units. 展开更多
关键词 Temporary housing DISASTERS Case study Container housing Type analysis
原文传递
Evaluation of employee profiles using a hybrid clustering and optimization model Practical study
15
作者 Mahsan Esmaeilzadeh Bijan Abdollahi +1 位作者 Asadallah Ganjali Akbar Hasanpoor 《International Journal of Intelligent Computing and Cybernetics》 EI 2016年第3期218-236,共19页
Purpose-The purpose of this paper is to introduce an evaluation methodology for employee profiles that will provide feedback to the training decision makers.Employee profiles play a crucial role in the evaluation proc... Purpose-The purpose of this paper is to introduce an evaluation methodology for employee profiles that will provide feedback to the training decision makers.Employee profiles play a crucial role in the evaluation process to improve the training process performance.This paper focuses on the clustering of the employees based on their profiles into specific categories that represent the employees’characteristics.The employees are classified into following categories:necessary training,required training,and no training.The work may answer the question of how to spend the budget of training for the employees.This investigation presents the use of fuzzy optimization and clustering hybrid model(data mining approaches)as a fuzzy imperialistic competitive algorithm(FICA)and k-means to find the employees’categories and predict their training requirements.Design/methodology/approach-Prior research that served as an impetus for this paper is discussed.The approach is to apply evolutionary algorithms and clustering hybrid model to improve the training decision system directions.Findings-This paper focuses on how to find a good model for the evaluation of employee profiles.The paper introduces the use of artificial intelligence methods(fuzzy optimization(FICA)and clustering techniques(K-means))in management.The suggestion and the recommendations were constructed based on the clustering results that represent the employee profiles and reflect their requirements during the training courses.Finally,the paper proved the ability of fuzzy optimization technique and clustering hybrid model in predicting the employee’s training requirements.Originality/value-This paper evaluates employee profiles based on new directions and expands the implication of clustering view in solving organizational challenges(in TCT for the first time). 展开更多
关键词 CLUSTERING Evolutionary algorithm Data mining Evolutionary computation Custer analysis Paper type Case study
原文传递
The Functional Approach to the Teaching of Translation: A Case Study on Beiying and Its English Translations
16
作者 YUAN Surong 《Chinese Journal of Applied Linguistics》 2016年第3期304-315,374,375,共14页
This paper reports the attempt to apply the functional approach to the translation teaching practice that guides students in their study of Chinese essays and their English translations. The famed modern Chinese essay... This paper reports the attempt to apply the functional approach to the translation teaching practice that guides students in their study of Chinese essays and their English translations. The famed modern Chinese essay Belying and its three English translations were taken for case study from the perspective of Experiential Function in Systemic Functional Linguistics. A process type analysis of Beiying and its English translations was conducted, including analysis of texts, sample processes, distributions of process types in Beiying and analyses of similarities and differences in the distributions. Results are as follows: 1) The similarities between English and Chinese texts lie in the experiential world, which makes translation possible. The process types in the essay text are directly related to genre, and the material process predominates among the process types in essay texts. 2) The differences are that the percentage of the material process in the ST is higher than that in the three English translations, and this shows the characteristics of verb-prominence in Chinese and nominalization in English. 3) Cultural differences in translation are the root-cause of linguistic differences. These results from the case of practicing the functional approach to the teaching of translation can help students gain understanding of English translations of Beiying and can provide some inspiration for the teaching of Chinese-English essay translation and the related studies. 展开更多
关键词 translation teaching Experiential Function process type analysis English translations of Beiying
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部