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Study on Evaluation of Farmland Adaptability of Degradable Plastic Film in High Altitude Arid Area 高海拔干旱区可降解地膜农田适应性评价研究
Pub Date : 1900-01-01 DOI: 10.12677/ojns.2022.104054
华国 张
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引用次数: 0
Coupling Relationship between the Transformation Ability of Mineral Resource-Based Cities and the Pressure of Urban Resources—A Case Study of Hei’he City 矿产资源型城市转型能力与城市资源压力的耦合关系——以黑河市为例
Pub Date : 1900-01-01 DOI: 10.12677/ojns.2022.106121
可 孙
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引用次数: 0
Analysis of a Typical Ozone Pollution Process and Its Precursor VOCs Emission Characteristics in Lu’an City Based on Online VOCs Observation 基于在线VOCs观测的六安市典型臭氧污染过程及其前体VOCs排放特征分析
Pub Date : 1900-01-01 DOI: 10.12677/ojns.2023.111011
平宽 李
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引用次数: 0
Temporal and Spatial Distribution Characteristics of Soil Temperature over China 中国土壤温度的时空分布特征
Pub Date : 1900-01-01 DOI: 10.12677/OJNS.2021.91012
江艳 杨
本文利用全球陆面数据同化系统(GLDAS)CLM陆面模式的土壤温度月资料,对1982~2019年中国区域土 壤温度时空变化特征进行研究。采用线性回归、Morlet小波分析以及MK趋势检验方法,分析中国区域 两个深度土壤层(0~10 cm、10~50 cm)的年、四季土壤温度的空间变化特征,月、年际、年代际变化趋 势和周期变化特征。结果表明:1) 中国区域两个深度层土壤温度时空变化特征基本一致;2) 年、四季 土壤温度空间分布均为中国东南部大于西北部,青藏高原西北侧土壤温度变化趋势会随着季节发生明显 变化;3) 土壤温度月变化呈现“倒U型”,春夏季大于秋冬季。年际变化中土壤温度最高值出现在1998 年,最低值出现在2003年。年代际变化最高值出现在20世纪90年代,最小值出现在21世纪初;4) 年、 四季土壤温度均存在两类尺度的周期变化,其中春、夏季时间尺度周期相似,秋、冬季时间尺度周期相 似;5) 20世纪末,年、春季、夏季、秋季土壤温度有增暖的突变现象。21世纪初,冬季有降温的突变 现象。
本文利用全球陆面数据同化系统(GLDAS)CLM陆面模式的土壤温度月资料,对1982~2019年中国区域土 壤温度时空变化特征进行研究。采用线性回归、Morlet小波分析以及MK趋势检验方法,分析中国区域 两个深度土壤层(0~10 cm、10~50 cm)的年、四季土壤温度的空间变化特征,月、年际、年代际变化趋 势和周期变化特征。结果表明:1) 中国区域两个深度层土壤温度时空变化特征基本一致;2) 年、四季 土壤温度空间分布均为中国东南部大于西北部,青藏高原西北侧土壤温度变化趋势会随着季节发生明显 变化;3) 土壤温度月变化呈现“倒U型”,春夏季大于秋冬季。年际变化中土壤温度最高值出现在1998 年,最低值出现在2003年。年代际变化最高值出现在20世纪90年代,最小值出现在21世纪初;4) 年、 四季土壤温度均存在两类尺度的周期变化,其中春、夏季时间尺度周期相似,秋、冬季时间尺度周期相 似;5) 20世纪末,年、春季、夏季、秋季土壤温度有增暖的突变现象。21世纪初,冬季有降温的突变 现象。
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引用次数: 0
Analysis of Precipitation Structure in Sichuan-Chongqing Region from 2016 to 2017 2016 - 2017年川渝地区降水结构分析
Pub Date : 1900-01-01 DOI: 10.12677/ojns.2020.85054
其融 李
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引用次数: 0
Determination of Permanganate in Environmental Water Samples Based on Nitrogen and Phosphorus Doped Carbon Dots Derived from Soybean Phospholipids 大豆磷脂中氮磷掺杂碳点法测定环境水样中的高锰酸盐
Pub Date : 1900-01-01 DOI: 10.12677/ojns.2023.111006
高 黄
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引用次数: 0
Characteristic Analysis of Precipitation Change in Sichuan Province during Recent 60 Years 近60年四川省降水变化特征分析
Pub Date : 1900-01-01 DOI: 10.12677/ojns.2021.96109
梓奕 王
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引用次数: 0
Thunderstorm Weather Analysis of Urumqi Airport from May 29 to 30, 2021 2021年5月29 - 30日乌鲁木齐机场雷暴天气分析
Pub Date : 1900-01-01 DOI: 10.12677/ojns.2022.101010
天成 张
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引用次数: 0
Research Progress of Gut Microbiota’s Function in Metabolic and Immunological Diseases 肠道微生物群在代谢与免疫疾病中的作用研究进展
Pub Date : 1900-01-01 DOI: 10.12677/ojns.2022.106107
卓 孙
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引用次数: 0
Seismic Wave Absorption and Attenuation Simulation and Anti-Q Filter Processing 地震波吸收与衰减仿真及抗q滤波器处理
Pub Date : 1900-01-01 DOI: 10.12677/ojns.2020.84033
坤 韩
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引用次数: 0
期刊
Open Journal of Natural Science
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