Results 41 to 50 of about 525 (118)
Shuitu Baochi Xuebao[目的] 为明确三峡库区植被时空演变特征,定量分析植被与气候、地形及人类活动等各影响因子的关系。[方法] 基于归一化植被指数(NDVI)数据,采用Theil-Sen Median趋势分析、Mann-Kendall显著性检验、Hurst指数分析、地理探测器模型等方法,探究2000—2020年三峡库区NDVI时空分布特征及其驱动机制。[结果] (1)三峡库区2000—2020年NDVI变化整体呈上升趋势,平均变化率2.89×10-3/a,NDVI值呈由西南向东北递增的规律。(2)高程 ...
戚海梅 +5 more
doaj
Shear characteristics and mesoscopic damage mechanism of long time soaking red sandstone under loading and unloading conditions [PDF]
The bank slope rock mass below the flood control restricted water level (145 m) in the Three Gorges Reservoir area has experienced long-term immersion in the process of reservoir water lifting and lowering; the water level changes lead to the rock mass ...
Binghao ZHOU +4 more
core +1 more source
Evaluation of root-canal isthmus debridement efficacy of 3 kinds of activated irrigation technique. [PDF]
Hua Xi Kou Qiang Yi Xue Za Zhi, 2022 Cong X, Xue M.
europepmc +1 more source
A Study of Leisure Agriculture and Tourism Industry Convergence - Based on Taiwan Experience and Case Study from 1985 to 2014 [PDF]
, 2016 近几十年来，我国随着对“三农”政策的重视与农业结构调整，农业、农村及农民状况得到显着改善，传统农业朝向现代农业发展方向迈进。休闲农业为结合第一级产业传统农业活动、第二级农产品加工制造的工业化活动、第三级农产品和农产加工品透过人为服务的服务业化活动，发挥产业融合乘数效用，将传统农业从第一级产业提升至第六级产业(1*2*3=6)。 本研究梳理国内外产业融合与产业耦合的概念理论基础上，借鉴物理学耦合度函数，构建休闲农业与旅游产业发展耦合协调度模型，以台湾为例，进行休闲农业与旅游产业耦合协调发展状况实证研究 ...
张威创
core
Survival analysis of pneumoconiosis patients in Ninghai County of Zhejiang Province, 2019‒2023 [PDF]
ObjectiveTo understand the survival time and possible influencing factors of pneumoconiosis patients in Ninghai County, Zhejiang Province who were followed up from 2019 to 2023, and to provide references for prolonging the survival time of pneumoconiosis
CHEN Shuangping, HU Yanmin, ZHANG Feng
core +1 more source
Shuitu Baochi Xuebao, 2005 通过对重庆市36座水库的监测,各水库chla值范围为1.59~52.3mg/m3;TP范围为0.002~0.598mg/L;TN范围为0.52~5.94mg/L;SD范围为0.48~3.2m;CODMn范围为0.75~9.3mg/L。CODMn、TN与chla之间呈极显著的正相关关系,SD与chla呈极显著的负相关关系,TP与chla的相关性较差,利用回归分析得出TN、SD、CODMn与chla的线性关系。利用修正的卡尔森指数对水库进行富营养化评价,结果表明:35座大中型水库达到富营养化的水库为27座 ...
刘景红 张晟 陈玉成 黎莉莉 高吉喜 李松
doaj +2 more sources
The Historical Evolution and Evaluation of Development Policies for Western China [PDF]
After the founding of P.R. China, China’s regional development strategy experienced the evolution progress of “Balanced Development→Unbalanced Development→Coordinated development”. There exist twice “GO-WEST” campaigns which laid the foundation of modern
Deng, Xiang, Lu, Zheng
core +1 more source
Formation and catastrophic evolution of giant landslides in the alpine canyon area of western China [PDF]
Objective Most hydroelectric projects in western China are located in alpine canyons. The intricate geological engineering conditions in this area have contributed to the widespread distribution of landslide disasters across the reservoir banks of ...
HU Xinli +7 more
core +1 more source
Shuitu Baochi Xuebao, 2023 为探究气候和植被覆盖度变化对三峡库区消落带库岸边坡的影响,通过开展人工模拟降雨试验,分析不同雨强和植被覆盖度(0,30%,50%,70%,90%)下坡面侵蚀规律及变化特征。结果表明:(1)在不同雨强下,植被边坡侵蚀累计产沙量均随植被覆盖度的增加呈现下降趋势,整体下降演变的趋势可分为迅猛—平缓—稳定3个阶段,三峡库区消落带库岸边坡的临界盖度为50%~70%,维持植被覆盖度在此区间可以有效抑制坡面的泥沙损失。(2)同一植被覆盖度条件下地表径流相对系数与雨强呈正相关 ...
王瑞红 +6 more
doaj
[A long way for the popularization and improvement of burn rehabilitation]. [PDF]
Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi, 2022 Xie WG.
europepmc +1 more source