HBRC Journal最新文献_第10页

Evaluation of structural performance and energy saving ability of normal, voided and foamed RC slabs 普通、空心和泡沫钢筋混凝土板的结构性能和节能性能评价

HBRC Journal Pub Date : 2019-01-02 DOI: 10.1080/16874048.2019.1626089

S. Mustafa, Ebtsam Fathy, M. Essa, Amal A.E. Mohammed

{"title":"Evaluation of structural performance and energy saving ability of normal, voided and foamed RC slabs","authors":"S. Mustafa, Ebtsam Fathy, M. Essa, Amal A.E. Mohammed","doi":"10.1080/16874048.2019.1626089","DOIUrl":"https://doi.org/10.1080/16874048.2019.1626089","url":null,"abstract":"ABSTRACT Saving energy consumed in buildings has become an important factor in design. Thus, the aim of this research is to assess the thermal and structural performance of different types of concrete slabs using real simulation for heat transferred from solar radiation, and from difference between indoor and outdoor temperatures in the existence of dead and imposed loads. Three types of slabs were examined: normal, voided and foamed concrete. Moreover, the effect of slab end conditions was investigated. Thermal analysis was performed for each slab type considering summer and winter weather of Egypt. In this analysis, the heat transferred through each slab was calculated, and hence the ability of each type to maintain the indoor temperature could be determined. The non-uniform distribution of temperature along the thickness of each slab type was used through structural analysis to examine the performance of the considered slabs under the effect of thermal actions and static loads. Both voided and foamed concrete slabs maintained successfully the indoor temperature from being affected by the climatic conditions; whereas, the best from a structural point of view was in favor of voided slabs as clarified through this research.","PeriodicalId":31454,"journal":{"name":"HBRC Journal","volume":"15 1","pages":"33 - 54"},"PeriodicalIF":0.0,"publicationDate":"2019-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/16874048.2019.1626089","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46037283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Numerical error assessment in nonlinear dynamic analysis of structures 结构非线性动力分析中的数值误差评估

HBRC Journal Pub Date : 2019-01-02 DOI: 10.1080/16874048.2019.1619257

W. Hassan

{"title":"Numerical error assessment in nonlinear dynamic analysis of structures","authors":"W. Hassan","doi":"10.1080/16874048.2019.1619257","DOIUrl":"https://doi.org/10.1080/16874048.2019.1619257","url":null,"abstract":"ABSTRACT The complex nature of exciting forces in earthquake engineering applications mandates employing numerical methods to obtain structural response. Several numerical methods are used in earthquake engineering to solve the ordinary differential equation of motion. Previous studies assumed the appropriate time step as a constant fraction of natural period of the system disregarding period range. This study is concerned with assessing, by numerical experiment; the numerical error of commonly used schemes in nonlinear dynamic analyses and assessing their appropriateness for different excitations with different structural periods. The current investigation involved testing Newmark, HHT and HHT1 methods. The three methods were tested for nonlinear single degree of freedom system representing a typical concrete bridge structure. Three different exciting forces were used to test the schemes; half-sine pulse, harmonic force, and actual ground motion record. Three natural periods were used to conduct the experiment, representing short, medium and long period systems including the resonant condition. Three structural damping ratios, representing lightly, moderately and heavily damped systems, were used to assess the damping effect on the accuracy of the schemes. The results of this investigation indicated that commonly used assumption of time step as a constant fraction of natural period of the system disregarding the period range could result in significant numerical errors. The study also showed the significant effect of damping ratio of the system on the accuracy of the numerical schemes. The study presents a recommendation matrix of the most appropriate time step for each scheme for different applications and structural conditions.","PeriodicalId":31454,"journal":{"name":"HBRC Journal","volume":"15 1","pages":"1 - 31"},"PeriodicalIF":0.0,"publicationDate":"2019-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/16874048.2019.1619257","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43817389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Winkler model for pile seismic analysis considering end constraints effects 考虑端部约束的桩基地震分析的Winkler模型

HBRC Journal Pub Date : 2018-12-01 DOI: 10.1016/j.hbrcj.2017.02.001

Ahmed M. Hassan

{"title":"Winkler model for pile seismic analysis considering end constraints effects","authors":"Ahmed M. Hassan","doi":"10.1016/j.hbrcj.2017.02.001","DOIUrl":"10.1016/j.hbrcj.2017.02.001","url":null,"abstract":"<div><p>Beam on nonlinear Winkler foundation (BNWF) analysis of pile foundation subjected to vertically propagating earthquake ground motions is presented in this paper. The BNWF is considered a simplified approach that is capable to model nonlinear soil-pile-structure interaction. Soil nonlinearity is simulated by p-y curves according to American Petroleum Institute (API) procedure. The analyses are carried out using the open source finite element platform OpenSees. Results are verified against centrifuge experiments and numerical finite element simulations published in the literature. In this paper pile tip and head constraints effects on bending moments and displacement responses are investigated. Three types of pile tip constraints are applied: floating, end bearing, and fixed supports. Pile top constraint is modeled as either free or fixed head. Three different earthquake ground motions are applied in the model. Effect of superstructure mass is investigated for the three considered earthquake records and the different assumed pile end and head constraints. The results indicate significant influence of pile tip and head constraints on pile bending moment and displacement responses. A significant effect of superstructure mass on the analyses results is also observed. The analyses show that earthquake record characteristics remarkably influence pile response behavior. Different earthquake records scaled to the same peak ground acceleration give different pile seismic responses.</p></div>","PeriodicalId":31454,"journal":{"name":"HBRC Journal","volume":"14 3","pages":"Pages 316-320"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.hbrcj.2017.02.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45284988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Fluidity evaluation of fiber reinforced-self compacting concrete based on buoyancy law 基于浮力规律的纤维增强自密实混凝土流动性评价

HBRC Journal Pub Date : 2018-12-01 DOI: 10.1016/j.hbrcj.2017.04.003

Metwally A.A. Abd Elaty, Mariam F. Ghazy

{"title":"Fluidity evaluation of fiber reinforced-self compacting concrete based on buoyancy law","authors":"Metwally A.A. Abd Elaty, Mariam F. Ghazy","doi":"10.1016/j.hbrcj.2017.04.003","DOIUrl":"10.1016/j.hbrcj.2017.04.003","url":null,"abstract":"<div><p>An experimental testing program was undertaken to evaluate the applicability of using the principles of Archimedes' law for buoyancy to assess the fluidity of self compacting concrete (SCC) as well as fiber reinforced self compacting concrete mixes (FR-SCC). A cone instrument with different apex angle values (20, 30, 40 and 45°) was implemented. One type of steel fibers (SF), three types of polypropylene fibers (PP1, PP2 and PP3) as well as one type of glass fibers (GF) with different fiber volume fractions and aspect ratios were conducted. Fourteen FR-SCC mixes in addition to a control mix were examined. A new terminology called fluidity index (FI) was proposed and evaluated based on the displaced volume rate according to the buoyancy law through performing cone penetration test. Parallel with the penetration test, traditional flow ability and segregation resistance tests were performed.</p><p>The results indicated that the proposed method is effective in evaluating the fluidity of FR-SCC mixes in terms of FI. FI values between 0.8 and 1.0 indicate SCC mixes whereas, FI lower than 0.8 indicate fresh concrete with fluidity not satisfying requirements of SCC. The proposed method can be performed either at laboratory or at field with and without sampling. Moreover, it can be directly adapted to the cast concrete in structural members provided that there is no obstruction for penetration. The direct proportion between FI and the slump flow test results indicated its viability to evaluate the fluidity of both FR-SCC and SCC mixtures.</p></div>","PeriodicalId":31454,"journal":{"name":"HBRC Journal","volume":"14 3","pages":"Pages 368-378"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.hbrcj.2017.04.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45601105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Survey of the critical issue of the public housing privacy to influence on residents’ living condition in Hong Kong 调查公共房屋私隐对香港居民生活状况的影响

HBRC Journal Pub Date : 2018-12-01 DOI: 10.1016/j.hbrcj.2016.11.005

Liu Wen Tao

{"title":"Survey of the critical issue of the public housing privacy to influence on residents’ living condition in Hong Kong","authors":"Liu Wen Tao","doi":"10.1016/j.hbrcj.2016.11.005","DOIUrl":"10.1016/j.hbrcj.2016.11.005","url":null,"abstract":"<div><p>This paper explores the oriental pearl—Hong Kong as the target and to know the situation of public housing privacy. Also, some future perspectives will be forwarded to solve the housing privacy problem of Hong Kong and to improve the local residents’ living condition. In the survey, the researcher obtains the data onto two types of interviews: local residents and government officers. It is also supported by the utilization of secondary data. The findings of this research indicate that most of the residents endure in the housing privacy problem, and this problem became the critical social issue that seriously affects their regular life in Hong Kong. Furthermore, the findings have powerful living condition implications. They are highly influential on humanity’s quality of life that related to housing private characteristics. Due to the high living density and small housing size of the public housing in Hong Kong, the local residents’ housing privacy definitely will be affected. Therefore, to improve public housing residents’ living condition in Hong Kong, certain housing private variables need to be paid attention and improved in the future. In a word, to improve residents’ living condition of the public housing in Hong Kong, certain housing private variables need to be paid attention and upgraded in the future.</p></div>","PeriodicalId":31454,"journal":{"name":"HBRC Journal","volume":"14 3","pages":"Pages 288-293"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.hbrcj.2016.11.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49427090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Structural performance of axially loaded FRP-confined rectangular concrete columns as affected by cross-section aspect ratio 纵横比对轴向受压frp约束矩形混凝土柱结构性能的影响

HBRC Journal Pub Date : 2018-12-01 DOI: 10.1016/j.hbrcj.2016.11.002

Omar A. Farghal

{"title":"Structural performance of axially loaded FRP-confined rectangular concrete columns as affected by cross-section aspect ratio","authors":"Omar A. Farghal","doi":"10.1016/j.hbrcj.2016.11.002","DOIUrl":"10.1016/j.hbrcj.2016.11.002","url":null,"abstract":"<div><p>Wrapping of concrete column using Fiber Reinforced Polymer (FRP) sheets can significantly improve their structural behavior. The aspect ratio of the cross section plays an important role on the efficiency of the applied strengthening technique. This research aimed, experimentally and analytically, to study the effect of aspect ratio on the obtained gain in strength and structural ductility. Also, the effect of both type and configuration of FRP wrapping is discussed. The obtained experimental results showed that the value of the aspect ratio has a significant effect on the gain in strength but it has no obvious influence on the obtained ductility. Moreover, based on the experimental results of 16 specimens concerning the load carrying capacity of FRP-confined specimens, a study to address the applicability of the analytical models (Egyptian code EC, American Concrete Institute ‘ACI’ code) proposed to predict the nominal compressive strength of rectangular columns confined with FRP sheets is presented in this research. Furthermore, this research introduces a modified model to deal with the FRP partial wrapping system. However both the examined models (ACI and EC) haven’t introduced any analytical models to predict the strength of RC columns confined partially with FRP wrapping sheets. The model proposed by ACI code showed an underestimation in predicting the nominal compressive strength, however that proposed by EC showed somewhat an acceptable estimation but inaccurate. Also, the modified expression suggested by the author dealing with columns confined with partially wrapped FRP sheets is examined in this research.</p></div>","PeriodicalId":31454,"journal":{"name":"HBRC Journal","volume":"14 3","pages":"Pages 264-271"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.hbrcj.2016.11.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48522144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Application of the ultimate limit states factored strength approach to design of cantilever walls in dry cohesionless soils 极限状态因子强度法在干无粘性土悬臂墙设计中的应用

HBRC Journal Pub Date : 2018-12-01 DOI: 10.1016/j.hbrcj.2018.02.001

Mohamed F. Mansour , Muhammad D. Saad El-Din , Yasser M. El-Mossallamy , Hesham A. Mahdi

{"title":"Application of the ultimate limit states factored strength approach to design of cantilever walls in dry cohesionless soils","authors":"Mohamed F. Mansour , Muhammad D. Saad El-Din , Yasser M. El-Mossallamy , Hesham A. Mahdi","doi":"10.1016/j.hbrcj.2018.02.001","DOIUrl":"10.1016/j.hbrcj.2018.02.001","url":null,"abstract":"<div><p>Geotechnical design is carried out according to one of two main methods; the Working Stress Design (WSD) and the Limit States Design (LSD) methods. The LSD can be carried out according to two main approaches; the Factored Strength Approach (FSA), and the Factored Resistance Approach (FRA). The use of LSD in Egypt is limited to the design of reinforced concrete structures. The geotechnical design is still based on the WSD method. The updated Egyptian Geotechnical Code will include both methods for a transition period before fully adopting the LSD. This study describes the methodology and results of determination of the partial factors for the limit states FSA for cantilever walls in dry cohesionless soils such that the LSD matches the WSD. These calibrated values are essential for the transition period when both the WSD and LSD design philosophies are applicable. The study recommends a partial factor of 1.25 in the future version of the Egyptian Code for the limit states FSA design of cantilever walls in dry cohesionless soils, which agrees with the current state of practice in different international codes.</p></div>","PeriodicalId":31454,"journal":{"name":"HBRC Journal","volume":"14 3","pages":"Pages 415-421"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.hbrcj.2018.02.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43852241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Using artificial neural networks (ANN) in projects monitoring dashboards’ formulation 人工神经网络(ANN)在项目监控仪表板制定中的应用

HBRC Journal Pub Date : 2018-12-01 DOI: 10.1016/j.hbrcj.2017.11.002

Amr Mossalam , Mohamad Arafa

{"title":"Using artificial neural networks (ANN) in projects monitoring dashboards’ formulation","authors":"Amr Mossalam , Mohamad Arafa","doi":"10.1016/j.hbrcj.2017.11.002","DOIUrl":"10.1016/j.hbrcj.2017.11.002","url":null,"abstract":"<div><p>It has been reported via several researches that the sponsorship involvement is a major factor influencing project success. These projects which may vary in their benefits, types, sizes, and complexity levels; generate some sort of difficulty for many government organizations managing hundreds of projects in selecting projects to be monitored. The initial selection of those projects which are being monitored through organization’s dashboards is usually drafted via some criteria that comprise a meaningful group (s) to the top management; and then this selection is altered by forcing few projects in and out. This study aim is to replace the initial existing manual selection process by an intelligent model. The proposed model is based on ANN (Artificial Neural Networks) that uses the databases of more than 300 projects out of which are 48 projects that were actually selected to be in the top management monitoring dashboards. The ANN model was built and tested for accuracy via examining the deviation between the model results and the actual selection. The test results showed acceptable confidence level in the model results where accuracy was proven to be initially accepted. The ANN model is expected to evolve and gains more maturity by including more projects that will be introduced in the coming years plans.</p></div>","PeriodicalId":31454,"journal":{"name":"HBRC Journal","volume":"14 3","pages":"Pages 385-392"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.hbrcj.2017.11.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46810325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

Science park implementation – A proposal for merging research and industry in developing Arab countries 科学园区实施——阿拉伯发展中国家科研与产业融合的建议

HBRC Journal Pub Date : 2018-12-01 DOI: 10.1016/j.hbrcj.2017.06.002

Ashraf Mansour Habib Mansour , Lamis Kanso

{"title":"Science park implementation – A proposal for merging research and industry in developing Arab countries","authors":"Ashraf Mansour Habib Mansour , Lamis Kanso","doi":"10.1016/j.hbrcj.2017.06.002","DOIUrl":"10.1016/j.hbrcj.2017.06.002","url":null,"abstract":"<div><p>Present economy, expansion, achievements of inventions, demographic distribution and business development of knowledge are the key elements of economic and social development. It looks as close as it is, to conception process; it is the process of creating a new innovation with the role of business needs and technological development. Since 1950, science parks have been developed in the United States of America to bridge the gap between research and Industry. Nowadays a science park is widely spread among developed countries, but not with the same plan, objectives, funds, equipped modalities and outcomes.</p><p>This paper will discuss Science Park implementation as an approach for merging research and industry in Lebanon which is considered an example of a developing Arab country. It is going to present how this moderately new archetype for business innovation could be implemented. Based on studies and analysis, an overview has been done by applying an ideal approach, plan, program, and site selection. This is according to the international criteria essence with the Middle Eastern status and especially the Lebanese one. The paper showed that the science park in Lebanon should be approached and financed by universities rather than the government. Furthermore, it highlights the criteria for its implementation and proposed the appropriate site.</p></div>","PeriodicalId":31454,"journal":{"name":"HBRC Journal","volume":"14 3","pages":"Pages 357-367"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.hbrcj.2017.06.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47568448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Enhancement of punching shear strength of flat slabs using shear-band reinforcement 用剪切带加固提高平板冲剪强度

HBRC Journal Pub Date : 2018-12-01 DOI: 10.1016/j.hbrcj.2017.11.003

Nasr Z. Hassan, Mostafa A. Osman, Awad M. El-Hashimy, Heba K. Tantawy

{"title":"Enhancement of punching shear strength of flat slabs using shear-band reinforcement","authors":"Nasr Z. Hassan, Mostafa A. Osman, Awad M. El-Hashimy, Heba K. Tantawy","doi":"10.1016/j.hbrcj.2017.11.003","DOIUrl":"10.1016/j.hbrcj.2017.11.003","url":null,"abstract":"<div><p>Flat-slab system is widely used nowadays. Major and critical problem of this system is its sudden brittle failure is called punching shear failure. To overcome the punching failure problem, there are many ways to increase the punching shear strength of concrete slabs, increasing slab thickness in the area adjacent to the column, increasing column thickness which is against the architectural desire, and finally providing slab with shear reinforcement. Shear reinforcement is more advanced from both the structural and economical point of view.</p><p>An experimental program includes seven full scale square flat slab interior column specimens tested under gravity loads. All slabs have same dimensions of 1700 mm × 1700 mm with thickness 160 mm and reinforcement ratio of 1.2%. Column was square of 200 mm length and 250 mm height. Elongated steel strips of 25 mm width and 1.5 mm thickness undulated into the slab in different ways to investigate punching shear resistance.</p><p>The program is divided into five groups. First group investigates the effect of installing the shear-band reinforcement (hanged up on top mesh, knit the top and bottom mesh together). The second group investigates the effect of inclination of shear reinforcement (shear band with vertical leg, with bended leg 45°). The third group investigates the effect of concentrating the shear reinforcement by increasing the quantity around the column. The fourth group investigates effect of radial distribution of shear-band system around the column. Finally, the fifth group investigates the effect of box distribution of shear-band system around the column.</p></div>","PeriodicalId":31454,"journal":{"name":"HBRC Journal","volume":"14 3","pages":"Pages 393-399"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.hbrcj.2017.11.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46577977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19