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The Research for Surface Properties of Steel Slag Powder and High-Temperature Rheological Properties of Asphalt Mortar

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Journal of Wuhan University of Technology(Materials Science) 2023年第5期38卷 1096-1104页

作者： WANG Yefei YUAN Yan yang lihong LIU Yong CHEN Yiwen College of Civil Engineering Fuzhou UniversityFuzhou 350108China Fujian Road&Bridge Construction Co. LtdFuzhou 350108China

In order to evaluate the feasibility of steel slag powder as filler,the coating properties of steel slag and limestone aggregate were compared by water boiling test,the micro morphology difierences between steel slag powder and mineral powder(limestone powder)were compared by scanning electron microscope(SEM),and the high-temperature rheological properties of asphalt mortar with difierent ratio of filler quality to asphalt quality(F/A)and difierent substitution rates of mineral powder(S/F)were studied by dynamic shear rheological *** results show that the surface microstructure of steel slag powder is more abundant than that of mineral powder,and the adhesion of steel slag to asphalt is better than that of *** the same temperature,the lower the ratio of S/F is,the greater the rutting factor and complex modulus will *** addition,the complex modulus and rutting factor of the asphalt mortar increase with the increase of F/A,and the filler type and F/A have a negligible efiect on the phase angle.

关键词： steel slag powder asphalt mortar microcosmic adhesion high-temperature rheological properties

A Multilevel Analysis of Asian Immigrant Children’s Reading Achievement in the Early Years:Evidence from the ECLS-K Data

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Frontiers of Education in China 2015年第1期10卷 110-131页

作者： Guofang LI lihong yang Department of Teacher Education College of EducationMichigan State UniversityEast LansingMI 48824USA Department of Counseling Educational Psychologyand Special EducationCollege of EducationMichigan State UniversityEast LansingMI 48824USA

This study investigates 1.5 generation1 Asian immigrant children’s(n=264)early literacy achievement patterns,treating them as a heterogeneous ***,the within-group variances in reading achievement from kindergarten to third grade are examined,drawing on four waves of data from the ECLS-K class of *** analysis shows that ethnicity plays a role in shaping the children’s initial reading readiness and later growth,but the effects of languages spoken at home are not *** analysis also demonstrates a persistent achievement gap between low-and high-socioeconomic status(SES)Asian ***,gender difference in terms of children’s reading development is not found to be *** is also no interaction between SES and the other factors such as gender,ethnicity and language backgrounds.

关键词： Asian immigrant children early reading achievement multilevel analysis

A review of SAGD technology development and its possible application potential on thin-layer super-heavy oil reservoirs

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Geoscience Frontiers 2022年第4期13卷 1-10页

作者： Guodong Cui Ting Liu Jingyu Xie Guanghui Rong lihong yang Faculty of Engineering China University of GeosciencesWuhan 430074China The 2th Oil Production Plant of PetroChina Changqing Oilfield Company Qingyang 710021China School of Resources and Geosciences China University of Mining and TechnologyXuzhou 221116China The 12th Oil Production Plant of PetroChina Changqing Oilfield Company Xi’an 710000China Sinopec Petroleum Exploration and Production Research Institute Beijing 100083China

Super-heavy oil is a significant unconventional energy source,and more than 30 years of research have shown that steam-assisted gravity drainage(SAGD)technology is suitable for thick super-heavy oil ***,more and more thin-layer super-heavy oil reservoirs have been discovered in China,while their deep buried depth and serous heterogeneity make the existing SAGD technology difficult to apply,so it is urgent to improve the existing SAGD technology for the thin-layer super-heavy *** this end,this paper focuses on the enlightenment of field application in SAGD ***,based on typical SAGD field projects,the development history of SAGD technology in the world was reviewed,and the influence of reservoir physical properties on the application of SAGD technology in thin-layer superheavy oil reservoirs was ***,the well pattern,wellbore structure,pre-heating,artificial lift,and monitor technique of SAGD were detailed described,and their adjustment direction was expounded for the development of thin-layer super-heavy oil ***,the gas-and solventassistant SAGD were comprehensively evaluated,and their application potential in thin-layer superheavy oil reservoirs was *** research results can provide theoretical guidance for the application of SAGD technology in thin-layer super-heavy oil reservoirs.

关键词： SAGD Thin-layer super-heavy oil Development technology Multimedia assisted SAGD

Radiolarian record to paleoecological environment change events over the past 1.2 MaBP in the southern South China Sea

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Chinese Science Bulletin 2002年第17期47卷 1478-1483页

作者： yang lihong CHEN Muhong WANG Rujian ZHEN Fan The South China Sea Institute of Oceanology Chinese Academy of SciencesGuangzhou 510301China Key Laboratory of Marine Geology Ministry of EducationTongji UniversityShanghai 200092China

This note studies the Radiolarian fossil groups since 1.2 MaBP in ODP leg 184 site 1143, the southern South China Sea (SCS). The result shows that radiolarian abundance experienced a significant variation: before 0.9 MaBP it remained at the extremely low level, but increased with low extent between 0.9-0.65 Ma, which corresponded to the Mid-Pleistocene Transition stage, and it increased rapidly after 0.65 MaBP. During the whole process, the average abundance became higher and higher in each stage, and showed regularly periodic fluctuations. The obvious increase after 0.65 MaBP is inferred to result from the enhanced up-welling in this region, which was induced by the intensified monsoon circulation after the 'Mid-Pleistocene Transition'. An outstanding result of the spectral analyses is that a long oscillation of - 0.2 Ma cycle was found in the records of radiolarian abundance and complex diversity, which corresponds well to the result of other paleoceanographic indexes. This probably indicated a

关键词： radiolarian southern South China Sea distribution environmental change site 1143.

Platform heterogeneity, platform governanee and complementors' product performance: an empirical study of the mobile application industry

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Frontiers of Business Research in China 2019年第3期13卷 284-303页

作者： Jingtao Yi Jinqiu He and lihong yang Business School Renmin University of ChinaBeijing 100872China Institute of Urban Development Nanjing Audit UniversityNanjing 211815China

The platform economy is becoming an important engine for industrial innovation and economic ***,empirical research on how platform governanee affects product performance through network externalities remains *** the perspective of platform ecosystems,this paper intends to empirically investigate the impact of platform governance on the product performance of complementors in the mobile application industry,based on firstly released apps on Apple's App Store and Google *** study shows that complementors of free mobile applications on the weakly regulated platform,Google Play,perform much better than those on the strictly regulated platform,Apple's App Store,due to the larger size of the installed ***,complementors on the strictly regulated platform,Apple's App Store,can take advantage of highly valued end-users on the demand side and higher degrees of product differentiation on the supply side to enhance their product *** is likely due to higher entry barriers for complementors,and better user communities for *** suggest that higher competition efficiency and performance levels are linked to the platforms associated with strict governance.

关键词： Platform heterogeneity Network externality.Platform governanee Complementor's product performance Competition Product differentiation Digital technology

What Factors Can Explain the Rising Spatial Disparity in Economic Activities in China?

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China & World Economy 2020年第3期28卷 51-72页

作者： lihong yang Jinwen Cheng Linhui Yu Chenhua Li School of Economics Nanjing Audit UniversityChina Shenzhen Municipal Financial Regulatory Bureau China School of Economics Zhjiang UniversityChina

This paper explores the impact of spatial externalities in shaping China's economic geography by establishing a theoretical framework that contains regional productivity,trade barriers and local amenities to capture spatial externalities between different regions over *** provincial data on bilateral trade flows with observed information about economic geography during the period 1998-2013,we estimate the distribution and marginal contribution of each *** results suggest that regional labor density and wage are positively related to exogenous productivity and amenities,and negatively related to trade ***,variation in the marginal contribution of exogenous productivity and amenities and trade barriers reflects the regional temporal-spatial features in China's recent marketization ***,the Chinese government should place more emphasis on absorbing advanced technologies and reducing inter-regional market barriers to promote balanced regional development and improve the eficiency of China s spatial resource allocation.

关键词： China economic topography regional amenities trade barrier

Reporting quality and effect size comparison in randomized controlled trials of bo's abdominal acupuncture using CONSORT statement and STRICTA

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Journal of Traditional Chinese Medicine 2016年第3期36卷 382-391页

作者： Wen Wanxin yang lihong Liu Shaonan Zhong Ying Hu Xiaoyi Huang Xiaowan Guo Xinfeng Department of General Internal Medicine Guangdong Provincial Hospital of Chinese Medicine (The Second Clinical College of Guangzhou University of Chinese Medicine) Evidence-based Medicine & Clinical Research Service Group Guangdong Provincial Hospital of Chinese Medicine (the Second Clinical College of Guangzhou University of Chinese Medicine Guangdong Provincial Academy of Chinese Medical Sciences) Department of Respiratory Medicine Guangdong Provincial Hospital of Chinese Medicine (the Second Clinical College of Guangzhou University of Chinese Medicine)

OBJECTIVE: To evaluate the reporting quality of randomized controlled trials(RCT) that compared Bo's abdominal acupuncture with conventional body acupuncture, and compare the efficacy and safetybetweenthembyperforminga ***: All RCTs comparing Bo's abdominalacupuncture with conventional body acupuncture were included. English and Chinese databases were searched from their respective inceptions to March 2014. The reporting quality was assessed according to the "Consolidated Standards of Reporting Trials"(CONSORT) checklist for parallel RCTs and the revised "Standards for Reporting Interventions in Clinical Trials of Acupuncture"(STRICTA). A Meta-analysis was conducted to synthesize the effect sizes,and publication bias was evaluated by the Egger linear regression test using ***: Ninety-seven studies were included, of which most lacked adequate reporting information, and 80.4% showed that the efficacy of abdominal acupuncture is superior to conventional body acupuncture, especially for the following diseases:lumbar disc herniation, cervical spondylosis, omarthritis and cervical vertigo, except simple ***-sizes were controversial when evaluating different ***: The international standard CONSORT statement and STRICTA guidelines should be strictly applied when reporting acupuncture RCTs in the future. Abdominal acupuncture appears to be more effective compared with conventional body acupuncture for some diseases. However, further high quality blind RCTs using validated outcomeindexesandstandardreportingarewarranted.

关键词： Bo's abdominal acupuncture Randomized controlled trials CONSORT STRICTA Reporting quality Meta-analysis

Hydroxyapatite Growth on Ti MAO Surface Assisted by the Addition of Calcium and Phosphate Ions in Hydrothermal Treatment Solution

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稀有金属材料与工程 2012年第S1期41卷 478-480页

作者： Ma Fengcang Liu Ping Li Wei Liu Xinkuan Chen Xiaohong yang lihong Zhu Jianmin Shanghai Univ Sci & Technol Sch Mat Sci & Engn Shanghai 200093 Peoples R China

Microarc oxidation was performed on Ti-6Al-4V in an electrolyte containing calcium and phosphate *** were hydrothermally treated in different solutions containing calcium and phosphate *** hydroxyapatite coatings were *** was found that hydroxyapatite coating is improved by the addition of calcium and phosphate ions in hydrothermal *** addition of phosphate ions promotes the nucleation and growth of *** the effect of single calcium ions is not *** addition of calcium and phosphate ions increases the nucleation and growth of hydroxyapatite,but decreases the preferred growth trend in some extent.

关键词： biomaterials surfaces hydroxyapatite crystal growth hydrothermal treatment thick film

Effects of Al Content on Microstructure and Mechanical Property of CrAlN Coating Synthesized by Reactive Magnetron Sputtering

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稀有金属材料与工程 2012年第S1期41卷 425-428页

作者： Li Wei Liu Ping Zheng Kangpei Ma Fengcang Liu Xinkuan Chen Xiaohong yang lihong Shanghai Univ Sci & Technol Sch Mat Sci & Engn Shanghai 200093 Peoples R China

A series of CrAlN coatings with different Al content were synthesized on high-speed steel(M2)substrate by reactive direct current(DC)magnetron *** influences of Al content on the microstructure and mechanical property of CrAlN coatings were studied by scanning electron microscopy(SEM),X-ray diffraction(XRD),energy dispersive spectrum(EDS)and nano-indentation techniques,*** results indicate that the coatings exhibit only fcc c-CrN phase when Al content is less than 65 at%,and fcc c-CrN and c-AlN phases when Al content is 78 at%.The coating with Al content of 60 at%exhibits high hardness and elastic *** maximum hardness and elastic modulus values could reach 36.8 GPa and 459.5 GPa,respectively.

关键词： CrAlN coating magnetron sputtering Al content microstructure mechanical property