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Journal of Geographical Sciences 2024年第3期34卷 459-482页

作者：胡旭钱凌欣钮潇雨高鸣罗文袁林旺俞肇元 School of Geography Nanjing Normal UniversityNanjing210023China Key Laboratory of Virtual Geographic Environment Nanjing Normal UniversityMinistry of EducationNanjing210023China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing210023China

The simulation of intercity population mobility helps to deepen the understanding of intercity population mobility and its underlying laws,which has great importance for epidemic prevention and control,social management,and even urban *** are many factors that affect intercity population mobility,such as socioeconomic attributes,geographical distance,and industrial *** complexity of the coupling among these factors makes it difficult to simulate intercity population *** address this issue,we propose a novel method named the quantum harmonic oscillator model for simulation of intercity population mobility(QHO-IPM).QHO-IPM describes the intercity population mobility as being affected by coupled driving factors that work as a multioscillator-coupled quantum harmonic oscillator system,which is further transformed by the oscillation process of an oscillator,namely,the breaking point of intercity population *** intercity population mobility among seven cities in the Beijing-Tianjin-Hebei region and its surrounding region is taken as an example for verifying the *** experimental results show that(1)compared with the reference methods(the autoregressive integrated moving average(ARIMA)and long and short-term memory(LSTM)models),the QHO-IPM achieves better simulation performance regarding intercity population mobility in terms of both overall trend and mutation.(2)The simulation error in the QHO-IPM for different-level intercity population mobility is small and stable,which illustrates the weak sensitivity of the QHO-IPM to intercity population mobility under different structures.(3)The discussion regarding the influence degree of different driving factors reveals the significant“one dominant and multiple auxiliary”factor pattern of driving factors on intercity population mobility in the study *** proposed method has the potential to provide valuable support for understanding intercity population mobility laws and related de

关键词： intercity population mobility coupling driving factors quantum harmonic oscillator model probability distribution pattern optimization strategy

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Information geography: A new fulcrum of geographic ternary world

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Science China Earth Sciences 2022年第2期65卷 383-386页

作者： Guonian LÜ linwang YUAN Zhaoyuan YU Key Laboratory of Virtual Geographic Environment School of GeographyNanjing Normal UniversityMinistry of EducationNanjing 210023China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing 210023China State Key Laboratory Cultivation Base of Geographical Environment Evolution(Jiangsu Province) Nanjing 210023China

The development trend of ternary space requires the construction of the information space for information mapping,transmission and transformation of geographic elements and social-human elements. Relevant researches of information geography from the perspective of Geographic Information Science and human geography are reviewed in this paper, then the concept interpretation of information geography from the perspective of ternary space is proposed. It is presented in this paper that information geography can be constructed with a framework using seven geographic elements as the basic expressing dimensions and seven social-human elements as the basic aggregating core. Information geography analyzes spatio-temporal distribution, structural characteristics, evolution process and interactions of various elements in the information space. And it eventually realizes the actual description, multi-scenario simulation, multi-objective decision-making and multi-channel control of the physical world and the social-human world.

关键词： Information geography Ternary space Seven geographic elements Seven social-human elements

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城市产业结构如何影响流动人口的定居意愿——基于结构方程模型的实证研究

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江苏师范大学学报（哲学社会科学版） 2024年第1期50卷 83-98,124页

作者：蔡果兰吕林旺中央民族大学理学院北京100081

在经济高质量发展的大背景下,产业结构转型升级正在持续进行,如何提高流动人口的定居意愿、实现以人为核心的新型城镇化是学界广泛关注的话题。然而现有针对定居意愿的研究多局限于收入、心理等个人属性,忽略了产业结构等客观因素对定... 详细信息

在经济高质量发展的大背景下,产业结构转型升级正在持续进行,如何提高流动人口的定居意愿、实现以人为核心的新型城镇化是学界广泛关注的话题。然而现有针对定居意愿的研究多局限于收入、心理等个人属性,忽略了产业结构等客观因素对定居意愿的制约与塑造。通过多群组结构方程模型,从理论和实证两方面研究了城市产业结构对流动人口定居意愿的路径和机制。研究发现,个人就业质量和心理认同作为中介变量,解释了产业结构对定居意愿所产生的较强的间接影响;流动人口所从事的行业类型在该影响路径中具有显著的调节效应;不同产业的流动人口在定居意愿的影响路径上存在显著差异,第二产业群体更关注就业质量,第三产业群体则近似相同的受到心理认同和就业质量的影响。基于此,本文提出制定差异化的政策,提供符合产业需求的就业机会,增强流动人口心理认同的建设,进而推动当地的城镇化和市民化进程。

关键词：流动人口定居意愿产业结构就业质量结构方程模型

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Biodegradation Characteristics of Environmental Endocrine Disruptor Di-n-butyl Phthalate

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Biomedical and Environmental Sciences 2005年第3期18卷 187-191页

作者： linwang QI-FANGLUO InstituteofEnvironmentalMedicine TongjiMedicalCollegeHuazhongUniversi~ofScienceandTechnologyWuhan430030HubeiChina CorrespondenceshouldbeaddressedtoQi-FangLUO InstituteofEnvironmentalMedicine13HangkongRoadWuhan430030HubeiChina

Objective The biodegradation characteristics of di-n-butyl phthalate (DBP), an environmental endocrine disruptor, were studied by the method of dominant bacteria and immobilized microorganisms. Methods Taking DBP as the only carbon source to acclimatize the collected activated sludge, the concentration of DBP increased progressively in the process of acclimatization. Plate streaking was used to separate 1 strain of the degradation dominant bacteria after acclimatization. Better conditions to degrade DBP by the bacterium could be obtained through orthogonal experiments and the bacterium was identified. Then the acclimated activated sludge was made to immobilize the microorganism using polyvinyl alcohol as entrapment agent. The immobilized microorganism degraded DBP at different conditions. Results The appropriate conditions to degrade DBP by the dominant bacteria were: degradation time, 32 h; DBP concentration, 200 mg/L; rate of shaking incubator, 100 r/min; pH, 7 and temperature, 30℃. DBP could be degraded by more than 95% under such conditions. The bacteria were identified as pseudomonas. The proliferated immobilized microorganisms degraded DBP more effectively and more adapted to temperature and pH than the free acclimated activated sludge. Conclusion One strain of DBP degradation dominant bacteria was separated from the acclimatized activated sludge. It could grow with DBP as the only carbon source and energy, and degraded DBP effectively. After having been immobilized and proliferated, the dominant bacteria could keep a higher biological activity and degrade DBP more effectively than activated sludge.

关键词： Environmental endocrine disruptor Di-n-butyl phthalate Biodegradation Degradation dominant bacteria Immobilized microorganism

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Evolutionary model of the central place hierarchical system

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Science China Earth Sciences 2011年第10期54卷 1614-1626页

作者： LU YuQi YUAN linwang ZHONG YeXi Key Laboratory of VGE Ministry of Education Nanjing Normal University Nanjing 210046 China

Central place theory is one of the two theoretical cornerstones of geography, yet it cannot be connected with other spatial structure models, fails to provide definite time-space parameter conditions, lacks an evolutionary process model, and does not easily enable construction of a complete theoretical system of regional spatial structure. This paper gives an in-depth analysis of the process and mechanism for production and evolution of central places of different grades, and constructs an evolutionary model of the central place hierarchical system. The results of deduction, analysis and simulation show that production and evolution of the central place hierarchical system may be divided into five stages. These stages are the embryonic, formative, improvement, maturation, and advancement stages. Affected by spatial location and centricity, central places have obvious differences in scale and functional structures. There are great differences in the scale of same-grade central places. However, low-grade central places could have larger scales than high-grade central places, and the central places of a central location may form the agglomeration area of central places. Based on the hypothesis condition of an isotropic plain, the research shows that it is possible not only to form proportional functional structures of central places, but also to produce non-proportional scale structures of central places, and thus to complete the transformation from rationalistic deduction of spatial equilibrium mode to an explanation and demonstration of an unbalanced practical model.

关键词： central place theory hierarchical system evolutionary model functional structure scale structure

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地理信息学科发展的思考

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地球信息科学学报 2024年第4期26卷 767-778页

作者：闾国年袁林旺陈旻张雪英周良辰俞肇元罗文乐松山吴明光南京师范大学地理科学学院南京210023 南京师范大学虚拟地理环境教育部重点实验室南京210023 江苏省地理信息资源开发与利用协同创新中心南京210023

地理信息科学(GIS)既有学科自身发展的需求,也是支撑地理学、地球系统科学和未来地球学等前沿探索的技术方法,还是服务于国家战略与社会发展的支撑技术。面对当今地理信息科学发展的内在规律、相关学科发展的外在驱动,以及人工智能等新... 详细信息

地理信息科学(GIS)既有学科自身发展的需求,也是支撑地理学、地球系统科学和未来地球学等前沿探索的技术方法,还是服务于国家战略与社会发展的支撑技术。面对当今地理信息科学发展的内在规律、相关学科发展的外在驱动,以及人工智能等新技术的牵引,本文首先从描述内容、表达维度、表达方式、分析方法与服务模式6个维度,分析了GIS的发展过程,探索了其发展规律;然后,在解读地理学发展的初心与目标的基础上,提出了面向“物理-人文-信息”三元世界的地理学学科体系,讨论了信息地理学研究对象,提出了一个综合信息7要素与地理描述7维度的概念模型;随后,从信息科学视角的地理信息科学、地理学视角的信息地理学、以及语言学视角的地理语言学3个方面分析了地理信息学科的发展趋势。最后,总结了GIS、信息时代的地理学、地理场景、地理大模型等可能的发展方向和要点,以期丰富对地理信息学科的认识,促进地理信息相关科学的发展,提升学科对国家发展需求支撑和社会服务能力。

关键词：地理信息地理信息系统地理信息科学信息地理学地理语言学地理场景三元世界

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Clarifying the atomic origin of electron killers in β-Ga_(2)O_(3) from the first-principles study of electron capture rates

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Journal of Semiconductors 2022年第11期43卷 61-69页

作者： Zhaojun Suo linwang Wang Shushen Li Junwei Luo State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

The emerging wide bandgap semiconductorβ-Ga_(2)O_(3) has attracted great interest due to its promising applications for high-power electronic devices and solar-blind ultraviolet ***-level defects inβ-Ga_(2)O_(3) have been intensively studied towards improving device ***-level signatures E_(1),E_(2),and E_(3) with energy positions of 0.55–0.63,0.74–0.81,and 1.01–1.10 eV below the conduction band minimum have frequently been observed and extensively investigated,but their atomic origins are still under *** this work,we attempt to clarify these deep-level signatures from the comparison of theoretically predicted electron capture cross-sections of suggested candidates,Ti and Fe substituting Ga on a tetrahedral site(Ti_(GaI) and Fe_(GaI))and an octahedral site(Ti_(GaII) and Fe_(GaII)),to experimentally measured *** first-principles approach predicted electron capture cross-sections of Ti_(GaI) and Ti_(GaII) defects are 8.56×10^(–14) and 2.97×10^(–13) cm^(2),in good agreement with the experimental values of E_(1) and E_(3) centers,***,therefore,confirmed that E_(1) and E_(3) centers are indeed associated with Ti_(GaI) and Ti_(GaII) defects,*** the predicted electron capture cross-sections of Fe_(Ga) defect are two orders of magnitude larger than the experimental value of the E_(2),indicating E_(2) may have other origins like C_(Ga) and Ga_(i),rather than common believed Fe_(Ga).

关键词： wide bandgap semiconductor,defects,carrier trap,electron-phonon coupling first-principles calculation

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Relationship between trefoil factor 1 expression and gastric mucosa injuries and gastric cancer

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World Journal of Gastroenterology 2005年第17期11卷 2674-2677页

作者： Jian-LinRen Jin-YanLuo Ya-PiLu linwang Hua-XiuShi DepartmentofGastroenterology TheSecondHospitalXianJiaotongUniversityXi'an710004ShaanxiProvinceChina DepartmentofGastroenterology TheSecondHospitalXianJiaotongUniversityXi'an710004ShaanxiProvinceChina//DepartmentofGastroenterologyZhongshanHospitalXiamenUniversityXiamen361004FujianProvinceChina

AIM:To determine whether trefoil factor 1 (TFF1) is associated with mucosa healing and carcinoma suppression, we assess the expression of trefoil factor 1 in normal and pathologic gastric mucosa. METHODS: TFF1 in normal and pathologic gastric mucosa was assessed by immunohistochemical method, and the average positive A was estimated by Motic Images Advanced 3.0 software. RESULTS: Increased TFF1 was detected in gastritis, gastric ulcer and duodenal ulcer compared with normal mucosa. The same result could be seen in multiple and compound ulcer compared with simple ulcer. There was no significant difference between gastric ulcer and duodenal ulcer, gastritis and simple ulcer respectively. Increased TFF1 was detected in the peripheral mucosa of the gastric adenocarcinoma compared with normal mucosa. The expression of TFF1 in gastric adenocarcinoma was related to the differentiation of adenocarcinoma. The lower the differentiation of adenocarcinoma, the weaker the expression of TFF1. There was no TFF1 expressed in low-differentiated adenocarcinoma. The expression of TFF1 in middle and highly differentiated adenocarcinoma was a little lower than that in normal mucosa. But there was no significant difference. No TFF1 was assessed in esophageal squamous carcinoma and peripheral tissue. There was no significant difference between male and female. CONCLUSION: The expression of TFF1 was higher in gastritis and peptic ulcer than that in normal mucosa, and was also higher in multiple and compound ulcer than in simple ulcer. It seems that TFF1 plays a role in gastric mucosa protection and epithelial restitution. Increased expression of TFF1 in peripheral tissue suggests that TFF1 is associated with mechanism of carcinoma suppression and differentiation. Decreased expression of TFF1 in carcinoma and its relativity to the differentiation suggests that TFF1 is related to gland and cell destruction of carcinoma.

关键词： Trefoil factor Gastric mucosa protection Epithelial restitution Carcinoma suppression

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A 3D GIS spatial data model based on conformal geometric algebra

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Science China Earth Sciences 2011年第1期54卷 101-112页

作者： YUAN linwang YU ZhaoYuan LUO Wen ZHOU LiangChen LU GuoNia Key Laboratory of VGE Ministry of Education Nanjing Normal University Nanjing 210046 China

We propose a new Geographic Information System (GIS) three-dimensional (3D) data model based on conformal geometric algebra (CGA). In this approach, geographic objects of different dimensions are mapped to the corresponding basic elements (blades) in Clifford algebra, and the expressions of multi-dimensional objects are unified without losing their geometric meaning. Geometric and topologic computations are also processed in a clear and coordinates-free way. Under the CGA framework, basic geometrics are constructed and expressed by the inner and outer operators. This expression combined geometrics of different dimensions and metric relations. We present the structure of the framework, data structure design, and the data storage, editing and updating mechanisms of the proposed 3D GIS data model. 3D GIS geometric and topological analyses are performed by CGA metric, geometric and topological operators using an object-oriented approach. Demonstrations with 3D residence district data suggest that our 3D data model expresses effectively geometric objects in different dimensions, which supports computation of both geometric and topological relations. The clear and effective expression and computation structure has the potential to support complex 3D GIS analysis, and spatio-temporal analysis.

关键词： conformal geometric algebra 3D data model 3D measurement 3D spatial relation

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Soil Organic Matter Dynamics Along a Vertical Vegetation Gradient in the Gongga Mountain on the Tibetan Plateau

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Journal of Integrative Plant Biology 2005年第4期47卷 411-420页

作者： linwang HuaOUYANG Cai-PingZHOU FengZHANG Ming-HuaSONG Yu-QiangTIAN InstituteofGeographicalSciencesandNaturalResourcesResearch theChineseAcademyofSciencesBeijing100101China／／GraduateSchooloftheChineseAcademyofSciencesBeijing100039China InstituteofGeographicalSciencesandNaturalResourcesResearch theChineseAcademyofSciencesBeijing100101China

Abstract: Our knowledge about soil organic matter (SOM) dynamics is limited although this is an important issue in the study of responses of ecosystems to global climate changes. Twelve sampling plots were set up every 200 m from 1 700 to 3 900 m along the vertical vegetation gradient along the east slope of Gongga Mountain. Samples were taken from all 12 plots for SOM content measurement, although only 5 of the 12 plots were subjected to radiocarbon measurements. A radiocarbon isotope method and a time-dependent model were used to quantify the SOM dynamics and SOM turnover rates along the vertical vegetation gradient. The results showed that the SOM turnover rate decreased and turnover time increased with soil depth for all vegetation types. The litter layer turnover rates presented a clear trend along the gradient. The litter layer turnover rates decreased with an increase in elevation, except that the litter layer turnover rate of mixed forest was higher than that of evergreen forest. Climatic factors, such as temperature and precipitation, were the main factors influencing the surface soil carbon dynamics. The turnover rates of the subsoil (including the A, B, and C horizons in the soil profiles) along the vertical gradient had no clear trends. The SOM of subalpine shrub and meadow turned over more slowly than that of the forest types in almost all soil horizons. The characteristic of short roots distributing in the upper part of the soil profile leads to different SOM dynamics of shrub and meadow compared with the forest types. Coniferous and mixed forests were susceptible to carbon loss from the young carbon pool, but their long and big roots resulted in high Δ14C values of the deep soil profiles and increased the input of young carbon to the deep soil. In evergreen forest, the carbon cumulative ability from the B horizon to the C horizon was weak. The different vegetation types, together with their different modes of nutrient and carbon intake, may be the mec

关键词： carbon cycle radiocarbon isotope Tibetan Plateau turnover rate turnover time

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