Results 61 to 70 of about 9,645 (160)
The Application of Spatial Econometrics Models in Mass Appraisal System of Real Estate [PDF]
, 2015 房地产批量评估系统可以成功地解决在较短时间内完成房地产大规模的评估工作，有助于加强房地产交易环节的税收征管，有助于确定房地产保有环节的税基，有助于完成房地产抵押贷款等商业类评估工作等。批量评估是一个包含多部分的复杂系统，其中，自动评估模型（可简称“评估模型”）是实现房地产评估自动化的核心，其设计的合理性直接关乎自动评估结果的精确度。本文对房地产批量评估系统中评估模型的理论进行了全面阐述，比较研究国内批量评估实践代表性城市的实际做法，认为深圳市所采用的整体评估模型分析框架更加适合国内房地产市场的现有特点 ...
马铮
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Finding floral and faunal species richness optima among active fire regimes
Conservation Biology, Volume 39, Issue 6, December 2025.Abstract Changing fire regimes have important implications for biodiversity and challenge traditional conservation approaches that rely on historical conditions as proxies for ecological integrity. This historical‐centric approach becomes increasingly tenuous under climate change, necessitating direct tests of environmental impacts on biodiversity.
Zachary L. Steel +8 more
wiley +1 more source
Shuitu Baochi Xuebao, 2007 用经典统计分析和地统计学的方法，对中国生态系统研究网络（CERN）临泽站新设置的农田生态系统综合观测场土壤性状的空间分布特性进行研究。结果表明，除pH外，土壤有机碳、全N、速效养分和电导率的变异性均超过20％，有机碳和全N的空间相关距离为13．8m和12．6m，表现出较高的空间异质性。克里格插值结果同样显示土壤各性状在研究的尺度上有明显的空间变异格局。相对误差为10％时采集124个土样才可达到95％的置信水平。作为生态网络长期监测样地，必须按空间异质性对观测场地进行采样分区、匀地过渡 ...
王芳, 苏永中
doaj
High-throughput Sequencing Analysis of Diversity and Spatial Heterogeneity of Fungal Community in Pit Muds of Different Ages for Baijiu Production [PDF]
The fungal community structure, the relationship between fungal flora and physicochemical factors, and the prediction of fungal function in pit muds from different spatial positions of 10- and 50-year-old cellars at Jinhui liquor Co. Ltd. were studied by
REN Haiwei, LI Zhijuan, LIU Meiqi, CAI Zaoning, SUN Yifan, GUO Xiaopeng, FAN Wenguang, ZHANG Bingyun, LI Yantao, WEI Junqiang
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Integrative Conservation, Volume 4, Issue 3, Page 430-441, September 2025.Our study identifies southern China, including mountainous regions and islands, as key areas rich in phylogenetic diversity, and phylogenetic endemism of lizards that are currently under‐protected. Current protected areas however do not adequately cover regions that are critical for preserving the evolutionary history of lizards.
Tao Liang (梁涛) +8 more
wiley +1 more source
Shuitu Baochi Xuebao, 2021 土壤水力参数是土壤水分和污染物迁移等陆面过程数值模拟的重要基础参数。为探明关中平原农田土壤水力参数空间分异特征，建立空间分布预测模型，在关中平原网格布设124个样点，采集根层0-20 cm原状和扰动土壤样品，利用van Genuchten模型拟合获取土壤水分特征曲线，获得残余含水量（θr）、饱和含水量（θs）以及系数α和n等土壤水力参数。采用经典统计学、地统计学和结构方程方法分析了θr、θs、α和n的空间变异特征及影响因子，建立了水力参数传递函数预测模型。结果表明：θr和α为强变异，θs为中等变异 ...
牛晓倩 +4 more
doaj
Ecological Analysis of Bird Communites in Xiamen(Amoy) Intertidal Zone during Spring. [PDF]
, 1999 Sampling investigation in Xiamen intertidal zone during spring indicated that waders were the main components of intertidal avian communities and 44.4% of the components of intertidal avian communities were composed by shorebirds (charadriiformes).Among ...
宋晓军, 陈小麟
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COVID‑19疫情期间经济韧性的空间异质性：以印度尼西亚爪哇岛为例 [PDF]
Received September 30, 2024; accepted June 10, 2025.Дата поступления 30 сентября 2024 г.; дата принятия к печати 10 июня 2025.Relevance. Spatial heterogeneity in economic resilience is a critical but understudied issue in Indonesia, where persistent ...
Aji, M. R. W. +14 more
core +1 more source
Shuitu Baochi Xuebao, 2019 生物结皮作为干旱和半干旱地区重要的生物组分，对该区域生态过程中的生物地球化学循环产生重要的影响。以陕北水蚀风蚀交错区的生物结皮为研究对象，调查该区域2种土壤（黄绵土和风沙土）和3种植被（长芒草、油蒿和小叶杨群落，以农田为对照）生境下生物结皮对土壤性质的影响。结果表明：（1）结皮层与结皮下层0-10 cm各土壤性质指标的变化存在显著差异 ...
张健, 徐明, 邹晓, 许明祥
doaj
牛山湖两种不同生境小型鱼类的种类组成、多样性和密度 [PDF]
, 2007 研究了2003年春季浅水草型湖泊牛山湖小型鱼类空间分布(种类组成、多样性和密度等)与生境异质性之间的关系.根据水生植被状况、离岸距离和水深,选择了两种差异较大且有代表性的生境类型,即近岸沉水植物茂密的生境A和远岸沉水植物稀疏的生境B.使用围网(180m2)在这两种生境中进行小型鱼类的采样,采用多次标志回捕法和Zippin去除法估算了围网内小型鱼类的密度.结果表明,两种不同生境中小型鱼类的种类组成、多样性度量值和密度估算值均存在一定程度的差异:1)生境A中的渔获物由5科14种小型鱼类组成 ...
叶少文, 曹文宣, 李钟杰
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