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Length of stay in urban areas of circular migrants from the mountainous areas in China

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Journal of Mountain Science 2016年第5期13卷 947-956页

作者： TAN Ming-hong LI Xiu-bin yan jian-zhong XIN Liang-jie SUN Lai-xiang Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101China College of Resources and Environment Southwest UniversityChongqing 400715China Department of Geographical Sciences University of MarylandCollege ParkMD 20742USA

Currently, there is limited literature dealing with the length of stay of circular migrants in urban areas （LSCMU）, although many studies have discussed the phenomenon of migration and the determinants of migration. This study attempts to fill that gap using survey data from the mountainous areas of Chongqing, Southwest China. From a comparative perspective, this study divided workers into two groups （a young group aged between 16 and 35 years and an old group aged between 36 and 65 years）. The average LSCMU values for the young and old groups were 225 days and ~74 days, respectively. Two multi-regression models were used to estimate the determinants of LSCMU in the two groups. The results showed that LSCMU was closely related to individual factors in both groups, including gender, age and job training. Family and community factors, including household size, arable land per capita and the distance from market, had much weaker effects on the dependent variable, especially in the older group. It was noticeable that job training had significant positive effects on LSCMU in both groups; these findings have special implications for the urbanization process in China.

关键词： Circular migrants Urban Mountain areas China

Factors Influencing the Grazing Management Styles of Settled Herders: a Case Study of Nagqu County, Tibetan Plateau, China

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Journal of Mountain Science 2013年第6期10卷 1074-1084页

作者： HUA Xiao-bo yan jian-zhong LIU Xiang WU Ying-ying LIU Lin-shan ZHANG Yi-li College of Resources and Environment Southwest University Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences

The implementation of pasture contracting policies in the Tibetan Plateau has been of widespread concern in the scientific community and related government departments. Studying the effects of the implementation of pasture contracting policies will help us understand herders' attitudes toward those policies and to amend existing policies *** paper analyzes 135 herder families' grazing management behavior using participatory rural appraisal(PRA), quantitative analysis and a Logistic regression model in three townships of Nagqu County in remote areas of the Tibetan Plateau, China. The results show that the herders have become settled and are no longer nomadic, so the settlement project has basically been completed and the policy of contracting for grazing rights is being gradually implemented in Nagqu County. Since the grazing rights and pastures were under contract, group-based management has been widely accepted in this area, which helps the herders deal with constraints, such as limited pasture area, a small grazing radius, controlled family animal husbandry and an uneven distribution of water. The herders that have more family members available for labor, higher proportion of family members with good health, and higher income from animal husbandry tend to choose household-based *** tend to choose group-based management when higher quality winter pastures are available.

关键词： Pasture contract Nagqu County Settledherders Participatory rural appraisal Tibetan Plateau

Recent progress in self-propelled particles

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Journal of Hydrodynamics 2024年第1期36卷 61-77页

作者： Zhen-yu Ouyang jian-zhong Lin Laboratory of Impact and Safety Engineering Ministry of EducationNingbo UniversityNingbo315201China Department of Mechanics State Key Laboratory of Fluid Power and Mechatronic SystemsZhejiang UniversityHangzhou310027China

Self-propelled particles are commonly found in a large number of planktonic organisms such as bacteria,fungi,and algae in nature,and researchers have taken a long interest in exploring their swimming mechanisms for more than a *** in the past 20 years,with the development of computational fluid dynamics and flow display technology,as well as the need for the design of synthetic self-propelled particles and micro-swimming devices,self-propelled particles have become the forefront and hotspot of current research in the field of fluid *** paper first introduces the swimming characteristics of common self-propelled particles,leading to a classic“squirmer”type self-propelled particle *** this basis,a systematic introduction and summary of the theoretical and numerical simulation research of“squirmer”will be ***,the main challenges and opportunities faced by the current research will be summarized.

关键词： Self-propelled particles multiphase flow hydrodynamic interaction

Tuning Surface Molecular Design of Porous Carbon for Blue Energy Harvesting

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Research 2024年第1期2023卷 651-662页

作者： jian Yu zhong-Lin Wang Tianwei Ma Department of Civil and Environmental Engineering University of Hawaii at MānoaHonoluluHI 96822USA Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China College of Engineering Texas A&M University-Corpus ChristiCorpus ChristiTX 78412USA

Capacitive mixing is a promising blue energy technology due to its membrane-free electricity generation and long electrode life ***,because of limited performance,existing systems do not lend themselves to practical *** it is a crucial factor directly influencing electrode behavior,surface chemistry has largely been overlooked in capacitive ***,we show that manipulating surface functionalization alone can tune the responses of electrodes to produce a high voltage rise without altering the pore structure of the *** findings reveal that the spontaneous electrode potential of a surface-modified carbon electrode shifts negatively proportional to the surface charge due to the surface groups,which explains why and how manipulating the surface chemistry can improve the power generation capacity.

关键词： electrode Porous mixing

Adjuvant therapy for hepatocellular carcinoma:Dilemmas at the start of a new era

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World Journal of Gastroenterology 2024年第8期30卷 806-810页

作者： jian-Hong zhong Department of Hepatobiliary Surgery Guangxi Medical University Cancer HospitalNanning 530021Guangxi Zhuang Autonomous RegionChina

Approximately 50%-70%of patients with hepatocellular carcinoma experience recurrence within five years after curative hepatic resection or *** a result,many patients receive adjuvant therapy after curative resection or ablation in order to prolong recurrence-free *** therapy recommended by national guidelines can differ,and guidelines do not specify when to initiate adjuvant therapy or how long to continue *** and other unanswered questions around adjuvant therapies make it difficult to optimize them and determine which may be more appropriate for a given type of *** questions need to be addressed by clinicians and researchers.

关键词： Adjuvant therapy Hepatocellular carcinoma Tumor recurrence Unanswered questions

High-entropy oxides as energy materials:from complexity to rational design

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Materials Futures 2024年第4期3卷 107-141页

作者： zhong yang Xianglin Xiang jian yang Zong-yan Zhao Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093People’s Republic of China

High-entropy oxides(HEOs),with their multi-principal-element compositional diversity,have emerged as promising candidates in the realm of energy *** review encapsulates the progress in harnessing HEOs for energy conversion and storage applications,encompassing solar cells,electrocatalysis,photocatalysis,lithium-ion batteries,and solid oxide fuel *** critical role of theoretical calculations and simulations is underscored,highlighting their contribution to elucidating material stability,deciphering structure-activity relationships,and enabling performance *** computational tools have been instrumental in multi-scale modeling,high-throughput screening,and integrating artificial intelligence for material *** their promise,challenges such as fabrication complexity,cost,and theoretical computational hurdles impede the broad application of *** address these,this review delineates future research *** include the innovation of cost-effective synthesis strategies,employment of in situ characterization for micro-chemical insights,exploration of unique physical phenomena to refine performance,and enhancement of computational models for precise structure-performance *** review calls for interdisciplinary synergy,fostering a collaborative approach between materials science,chemistry,physics,and related ***,these efforts are poised to propel HEOs towards commercial viability in the new energy technologies,heralding innovative solutions to pressing energy and environmental challenges.

关键词： high entropy oxides new energy materials theoretical calculations material design electrochemical energy storage photo(electro)catalysis

BSEC Method for Unveiling Open Clusters and its Application to Gaia DR3:83 New Clusters

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Research in Astronomy and Astrophysics 2024年第5期24卷 169-184页

作者： zhong-Mu Li Cai-yan Mao Institute of Astronomy and Information Dali UniversityDali 671003China

Open clusters(OCs) are common in the Milky Way, but most of them remain undiscovered. There are numerous techniques, including some machine-learning algorithms, available for the exploration of OCs. However, each method has its limitations and therefore, different approaches to discovering OCs hold significant values. We develop a comprehensive approach method to automatically explore the data space and identify potential OC candidates with relatively reliable membership determination. This approach combines the techniques of Hierarchical Density-Based Spatial Clustering of Applications with Noise, Gaussian mixture model, and a novel cluster member identification technique, color excess constraint. The new method exhibits efficiency in detecting OCs while ensuring precise determination of cluster memberships. Because the main feature of this technique is to add an extra constraint(EC) for the members of cluster candidates using the homogeneity of color excess,compared to typical blind search codes, it is called Blind Search-Extra Constraint(BSEC) method. It is successfully applied to the Gaia Data Release 3, and 83 new OCs are found, whose color–magnitude diagrams(CMDs) are fitted well to the isochrones. In addition, this study reports 621 new OC candidates with discernible main sequence or red giant branch. It is shown that BSEC technique can discard some false negatives of previous works, which takes about three percentage of known clusters. It shows that as an EC, the color excess(or twocolor) constraint is useful for removing fake cluster member stars from the clusters that are identified from the positions and proper motions of stars, and getting more precise CMDs, when differential reddening of member stars of a cluster is not large(e.g., ΔE(G_(BP)-G_(RP)) < 0.5 mag). It makes the CMDs of 15% clusters clearer(in particular for the region near turnoff) and therefore is helpful for CMD and stellar population studies. Our result suggests that the color excess con

关键词： Galaxy stellar content-(Galaxy:)open clusters and associations general-stars fundamental parameters

An Electrochemical Perspective of Aqueous Zinc Metal Anode

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Nano-Micro Letters 2024年第1期16卷 274-312页

作者： Huibo yan Songmei Li Jinyan zhong Bin Li School of Materials Science and Engineering Beihang UniversityBeijing 100191People’s Republic of China

Based on the attributes of nonflammability,environmental benignity,and cost-effectiveness of aqueous electrolytes,as well as the favorable compatibility of zinc metal with them,aqueous zinc ions batteries(AZIBs)become the leading energy storage candidate to meet the requirements of safety and low ***,aqueous electrolytes,acting as a double-edged sword,also play a negative role by directly or indirectly causing various parasitic reactions at the zinc anode *** reactions include hydrogen evolution reaction,passivation,and dendrites,resulting in poor Coulombic efficiency and short lifespan of AZIBs.A comprehensive review of aqueous electrolytes chemistry,zinc chemistry,mechanism and chemistry of parasitic reactions,and their relationship is ***,the understanding of strategies for suppressing parasitic reactions from an electrochemical perspective is not profound *** this review,firstly,the chemistry of electrolytes,zinc anodes,and parasitic reactions and their relationship in AZIBs are deeply ***,the strategies for suppressing parasitic reactions from the perspective of enhancing the inherent thermodynamic stability of electrolytes and anodes,and lowering the dynamics of parasitic reactions at Zn/electrolyte interfaces are ***,the perspectives on the future development direction of aqueous electrolytes,zinc anodes,and Zn/electrolyte interfaces are presented.

关键词： Aqueous zinc ions batteries Parasitic reactions Aqueous electrolyte Zinc anode

Efficacy of Chinese Medicine Treatment Based on Syndrome Differentiation for Primary Insomnia:A Randomized Placebo Controlled Triple-Blinded Trial

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Chinese Journal of Integrative Medicine 2024年第10期30卷 867-876页

作者： XIONG Zhi-yi LU Ying HE Li-yun ZHANG Run-shun ZHOU Xue-zhong LI Peng LIU yan-jiao ZHU jian-gui yan Shi-yan LIU Bao-yan International Acupuncture and Moxibustion Innovation Institute School of Acupuncture-Moxibustion and TuinaBeijing University of Chinese MedicineBeijing100029China Department of Biomedical Data Science Stanford University School of MedicineStanfordCA94305USA Institute of Basic Research in Clinical Medicine China Academy of Chinese Medical SciencesBeijing100700China Guang’anmen Hospital China Academy of Chinese Medical SciencesBeijing100053China School of Computer and Information Technology Beijing Jiaotong UniversityBeijing100044China Beijing Xicheng District Community Healthcare Center Beijing100120China China Academy of Chinese Medical Sciences Beijing100700China

Objective:To assess efficacy of Chinese medicine(CM)on insomnia considering characteristics of treatment based on syndrome ***:A total of 116 participants aged 18 to 65 years with moderate and severe primary insomnia were randomized to the placebo(n=20)or the CM group(n=96)for a 4-week treatment and a 4-week *** CM clinicians independently prescribed treatments for each patient based on syndromes *** primary outcome was change in total sleep time(TST)from *** endpoints included sleep onset latency(SOL),wake time after sleep onset(WASO),sleep efficiency,Pittsburgh Sleep Quality Index(PSQI)and CM ***:The CM group had an average 0.6 h more(95%confidence interval(CI):0.3–0.9,P<0.001)TST and 34.1%(10.3%–58.0%,P=0.005)more patients beyond 0.5 h TST increment than that of the placebo *** was changed–3.3(–3.8 to–2.7)in the CM group,a–2.0(–3.2 to–0.8,P<0.001)difference from the placebo *** CM symptom score in the CM group decreased–2.0(–3.3 to–0.7,P=0.003)more than the placebo *** and WASO changes were not significantly different between *** analysis of prescriptions by these clinicians revealed blood deficiency and Liver stagnation as the most common *** for these clinicians displayed relative stability,while the herbs *** adverse events were mild and were not related to study ***:CM treatment based on syndrome differentiation can increase TST and improve sleep quality of primary *** is effective and safe for primary *** future studies,the long-term efficacy validation and the exploratory of eutherapeutic clinicians'fixed herb formulas should be addressed.(Registration ***01613183).

关键词： primary insomnia Chinese medicine syndrome differentiation randomized controlled trial