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SPECIAL ISSUE： MIGRANT WORKESR IN The COURSE OF URBANIZATION Factors influencing the migration intentions of rural workers in the Pearl River Delta

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Social Sciences in China 2008年第3期29卷 157-171页

作者： cai he Wang Jin Department of Sociology and Social Work Sun Yat-sen University

The focus of this article is this question： under China＇s present household registration system, what factors influence migrant workers＇ decisions to obtain urban household registration in order to stay permanently in the city？ Our research finds that if willingness to give up their land is used as the indicator for behavioral permanent migration, the main factors that influence migrant workers＇ intention to migrate will be their individual motives for migration, i.e. choices based on economic rationality. If wishing to transfer their household registration to the cities where they work is used as the indicator for institutional permanent migration, the main factors that influence their intentions will be regional conditions and the pressure of institutional legitimacy, and their choices will be socially rational in that they are seeking institutional protection to improve their life in the city. Groups with different aspirations vary in their individual motivations for migration and the degree to which they feel the pressure of institutional legitimacy.

关键词： migration intentions institutional migration behavioral migration individual motivations for migration pressure of institutional legitimacy

Spike protein of SARS‐CoV‐2 Omicron(B.1.1.529)variant has a reduced ability to induce the immune response

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Signal Transduction and Targeted Therapy 2022年第5期7卷 1379-1382页

作者： cai he Xuemei he Jingyun Yang Hong Lei Weiqi Hong Xiangrong Song Li Yang Jiong Li Wei Wang Guobo Shen Guangwen Lu Xiawei Wei Laboratory of Aging Research and Cancer Drug Target State Key Laboratory of Biotherapy and Cancer CenterNational Clinical Research Center for GeriatricsWest China HospitalSichuan University610041 ChengduChina

Dear Editor,The severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)variant Omicron(B.1.1.529)has attracted great concerns since its identification in South *** is the fifth variant of concern(VOC)after Alpha(B.1.1.7),Beta(B.1.351),Gamma(P.1)and Delta(B.1.617.2),and set a record with the shortest duration from variants of interest(VOI)to VOC so *** 2 months after its first report,over 80%of global sequenced samples are verified as Omicron according to GISAID(https://***/explore/World/AllSamples/from=2021-12-15&to=2022-01-15/variants?pangoLineage=B.1.1.529*).

关键词： acute respiratory shortest

Inactivated SARS-CoV-2 induces acute respiratory distress syndrome in human A CE2-transgenic mice

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Signal Transduction and Targeted Therapy 2022年第1期7卷 310-321页

作者： Zhenfei Bi Weiqi Hong Haiying Que cai he Wenyan Ren Jingyun Yang Tianqi Lu Li Chen Shuaiyao Lu Xiaozhong Peng Xiawei Wei Laboratory of Aging Research and Cancer Drug Target State Key Laboratory of BiotherapyNational Clinical Research Center for GeriatricsWest China HospitalSichuan UniversityNo.17Block 3Southern Renmin RoadChengduSichuan 610041PR China National Kunming High-level Biosafety Primate Research Center Institute of Medical BiologyChinese Academy of Medical Sciences and Peking Union Medical CollegeKunmingYunnanChina

The development of animal models for COVID-19 is essential for basic research and drug/vaccine *** reported COVID-19 animal models need to be established under a high biosafety level condition for the utilization of live SARS-CoV-2,which greatly limits its application in routine ***,we gen erate a mouse model of COVID-19 un der a gen eral laboratory condition that captures multiple characteristics of SARS-CoV-2-induced acute respiratory distress syndrome(ARDS)observed in huma ***,human ACE2-tra nsge nic(MCE2)mice were in tratracheally in stilled with the formaldehyde-inactivated SARS-CoV-2,resulting in a rapid weight loss and detrimental changes in lung structure and *** pulmonary pathologic changes were characterized by diffuse alveolar damage with pulmonary consolidation,hemorrhage,necrotic debris,and hyaline membrane *** production of fatal cytokines(IL-β,TNF-α,and IL-6)and the infiltration of activated neutrophils,inflammatory monocyte-macrophages,and T cells in the lung were also determined,suggesting the activation of an adaptive immune *** strategies,such as dexamethasone or passive antibody therapy,could effectively ameliorate the disease progression in this ***,the established mouse model for SARS-CoV-2-induced ARDS in the current study may provide a robust tool for researchers in the standard open laboratory to investigate the pathological mechanisms or develop new therapeutic strategies for COVID-19 and ARDS.

关键词： distress lung routine

Altered oceanic crust source for the alkaline rocks with superchondritic Nb/Ta ratios due to the steep subduction

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Journal of Earth Science 2024年

作者： Xu Zhao Ning-Bo Li he-cai Niu Shu-Cheng Tan Department of Geology， School of Earth Sciences， Yunnan University CAS Key Laboratory of Mineralogy and Metallogeny， Guangzhou Institute of Geochemistry， Chinese Academy of Sciences CAS Center for Excellence in Deep Earth Science

The cause resulting in alkaline rocks with superchondritic Nb/Ta ratios remains a geochemical enigma. This paper present zircon and apatite geochronology， mineralogy， geochemistry， and Nd-Hf-Zn isotope investigation on the Ejinao nepheline syenite from South China to constrain the petrogenesis of alkaline rocks. The occurrence of alkaline minerals， including alkaline feldspar， arfvedsonite， and nepheline， indicate an alkaline feature of the Ejinao nepheline syenite. Zircon and apatite from the rock show U-Pb concordia age of 135.4±0.9 Ma and 137.5±5.8Ma， respectively， suggesting generation in the Early Cretaceous. The rock is characterized by low MgO （0.17 wt.%–0.26 wt.%） contents， but high Fe2O3T（4.66 wt.%–6.16 wt.%） and total alkalis (Na2O + K2O = 12.1 wt.%–13.1 wt.%) contents， consistent with the melts from subducting oceanic crust rather than mantle peridotite. The rock has low TiO2（0.13 wt.%–0.21 wt.%） contents and superchondritic Nb/Ta and Zr/Hf ratios， resulting from rutile residue in the source area. The εNd（t）（-1.35 to -1.09）， εHf（t）（-3.03 to -1.52）， and δ66Zn （0.32‰ to 0.34‰） values of the nepheline syenite manifest the involvement of 15%–20% carbonate-bearing sediments in the altered oceanic crust. Geochemical modeling further reveals that the nepheline syenite was sourced from 10%–20% melting of such a source. This superchondritic Nb/Ta nepheline syenite was generated during the steep subduction of the Paleo-Pacific Ocean， which is needed to bring oceanic slab to a hot mantle and resulted in the altered oceanic crust melting. Our study highlights that the altered oceanic crust represents a novel source for superchondritic Nb/Ta alkaline rocks.

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Scavenging and release of REE and HFSE by Na-metasomatism in magmatic-hydrothermal systems

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Fundamental Research 2024年第2期4卷 315-323页

作者： Wu-Bin Yang he-cai Niu Ning-Bo Li Pete Hollings Shannon Zurevinski Roger H.Mitchell Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China CAS Center for Excellence in Deep Earth Science Guangzhou 510640China Department of Geology Lakehead UniversityThunder BayON P7B 5E1Canada

Exploitable or potentially exploitable deposits of critical metals,such as rare-earth(REE)and high-field-strength elements(HFSE),are commonly associated with alkaline or peralkaline igneous ***,the origin,transport and concentration of these metals in peralkaline systems remains poorly *** study presents the results of a mineralogical and geochemical investigation of the Na-metasomatism of alkali amphiboles and clinopyroxenes from a barren peralkaline granite pluton in NE China,to assess the remobilization and redistribution of REE and HFSE during magmatic-hydrothermal *** amphiboles and aegirine-augites from the peralkaline granites show evolutionary trends from sodic-calcic to sodic compositions,with increasing REE and HFSE concentrations as a function of increasing Na-index[Na^(#),defined as molar Na/(Na+Ca)ratios].The Na-amphiboles(i.e.,arfvedsonite)and aegirine-augites can be subsequently altered,or breakdown,to form hydrothermal aegirine during late-or post-magmatic *** compositions analyzed by insitu LA-ICPMS show that the primary aegirine-augites have high and variable REE(2194-3627 ppm)and HFSE(4194-16,862 ppm)contents,suggesting that these critical metals can be scavenged by alkali amphiboles and *** to the primary aegirine-augites,the presentative early replacement aegirine(Aeg-I,Na^(#)=0.91-0.94)has notably lower REE(1484-1972)and HFSE(4351-5621)*** contrast,the late hydrothermal aegirine(Aeg-II,Na^(#)=0.92-0.96)has significantly lower REE(317-456 ppm)and HFSE(6.44-72.2 ppm)*** that the increasing Na^(#)from aegirine-augites to hydrothermal aegirines likely resulted from Na-metasomatism,a scavenging-release model can explain the remobilization of REE and HFSE in peralkaline granitic *** scavenging and release of REE and HFSE by Na-metasomatism provides key insights into the genesis of globally significant REE and HFSE *** high Na-index of th

关键词： Critical metals Alkali amphiboles Na-metasomatism REE and HFSE Na-index(Na^(#))

Study on dispersion characteristics of terahertz waves in helical waveguides

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Chinese Physics B 2020年第11期29卷 386-390页

作者： Jin-Hai Sun Shao-Hua Zhang Xu-Tao Zhang he cai Yong-Qiang Liu Zeng-Ming Chao Science and Technology on Electromagnetic Scattering Laboratory Beijing 100854China China Aerospace System Engineering Corporation Beijing 100070China

Corresponding to the atmospheric transmission windows of the electromagnetic spectrum in the low terahertz range,the mode coupling and dispersion characteristics of two helically corrugated waveguides(HCW)in the frequency ranges of 90 GHz-100 GHz and 260 GHz-265 GHz are *** analytic calculations and numerical simulations,dispersion curves and structural parameters of the two frequency ranges waveguides are obtained.A novel method was proposed to obtain the dispersion of the HCW from the eigenwave solution using a periodic boundary *** HCW in a frequency range of 90 GHz-100 GHz was fabricated and its dispersion performance was *** comparing the measured results with the theoretical and the simulated results,the validity of the analytical and simulation method is *** to our machining capability,the dispersion of the 260 GHz-265 GHz HCW was only simulated and calculated and it was found that the results agree well with each other.

关键词： coupling coefficient dispersion curves gyrotron traveling wave tube(gyro-TWT) helical waveguide

维普期刊数据库

Novel homozygous ADAMTS17 missense variant in Weill-Marchesani syndrome

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International Journal of Ophthalmology(English edition) 2023年第5期16卷 694-699页

作者： Na Miao Yao Zhang Jin-Ying Liao Lin Zhou Ji-cai he Rong-Qin Yang Xu-Yang Liu Li Tang Department of Ophthalmology West China Hospital of Sichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Ophthalmology First People’s Hospital of Liangshan Yi Autonomous PrefectureXichang 615306Sichuan ProvinceChina Xiamen Eye Center Xiamen UniversityXiamen 361011Fujian ProvinceChina Department of Ophthalmology Shenzhen People’s Hospitalthe 2nd Clinical Medical CollegeJinan UniversityShenzhen 518040Guangdong ProvinceChina

AIM: To explore the phenotype and genotype of WeillMarchesani syndrome(WMS) in a Chinese family and review related ***: Three WMS patients and other unaffected individuals in this family with a history of consanguineous marriage were included in this study. Medical history, comprehensive ophthalmic examinations, and systemic evaluation, as well as whole exome and Sanger sequencing of specific genomic regions, were performed. RESULTS: The three affected siblings presented with short stature, brachydactyly and ocular disorders, including very shallow anterior chamber, high myopia, microspherophakia lens subluxation with stretched zonules and glaucoma. Genetic analysis verified a homozygous missense mutation(c.2983C>T: p. Arg995Trp) in ADAMTS17,which was correlated with the diseases in this family, indicating an autosomal recessive inherited manner of WMS. This review aims to summarize the mutation sites of WMS genes, so as to prevent the disease and better guide clinical diagnosis and ***: A novel homozygous missense variant of ADAMTS17 is identified in a WMS family with a history of consanguineous marriage. Our study expands the range of mutations associated with WMS and deepens our understanding of pathology in disease associated with ADAMTS17 variants.

关键词： Weill-Marchesani syndrome ADAMTS17 missense variation molecular genetics

Efficient random saliency map detection

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Science China(Information Sciences) 2011年第6期54卷 1207-1217页

作者： HUANG ZhiYong, he FaZhi , cai XianTao, ZOU ZhengQin, LIU Jing, LIANG MingMing & CheN XiaoComputer School, Wuhan University, Wuhan 430074, China Computer School Wuhan University Wuhan China

Most image retargeting algorithms rely heavily on valid saliency map detection to proceed. However, the inefficiency of high quality saliency map detection severely restricts the application of these image retargeting methods. In this paper, we propose a random algorithm for efficient context-aware saliency map detection. Our method is a multiple level saliency map detection algorithm that integrates multiple level coarse saliency maps into the resulting saliency map and selectively updates unreliable regions of the saliency map to refine detection results. Because of the randomized search, our method requires very little additional memory beyond that for the input image and result map, and does not need to build auxiliary data structures to accelerate the saliency map detection. We have implemented our algorithm on a GPU and demonstrated the performance for a variety of images and video sequences, compared with state-of-the-art image processing.

关键词： saliency map detection image retargeting random algorithm

Fair value accounting under financial crisis

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Journal of Modern Accounting and Auditing 2010年第6期6卷 59-62页

作者： he cai-xia ZHANG Chi School of Accounting Zhongnan University of Economics and Law Wuhan 430073 China School of Management Huazhong University of Science and Technology Wuhan 430073 China

The recent financial crisis has led to a vigorous debate about the pros and cons of fair-value accounting （FVA）. This debate presents a major challenge for FVA going forward and standard setters＇ push to extend FVA into other areas. In this article, we highlight three important issues as an attempt to make sense of the debate. First, much of the controversy results from confusion about what is new and different about FVA. Second, while there are legitimate concerns about marking to market （or pure FVA） in times of financial crisis, it is less clear that these problems apply to FVA as stipulated by the accounting standards, be it IFRS or U.S. GAAP. Third, historical cost accounting （HCA） is unlikely to be the remedy. There are a number of concerns about HCA as well and these problems could be larger than those with FVA.

关键词： fair value accounting historical cost accounting financial crisis