栏目导航
- GPM IMERGE卫星遥感降水数据在巢湖流域的精度评价
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作者：程扬
出版日期：2020-01-01
来源：关键词：降水数据 精度评价 GPM 巢湖流域
- 描述：以处于湿润区的巢湖流域为研究区,利用120个地面站点2016年1月至2017年2月的实测降水数据,评估了GPM IMERGE降水数据在研究区的适用性和分布规律。结果显示:(1) GPM产品对巢湖流域降水的估测能力总体较高。日尺度上,GPM产品均表现出较高的线性相关性(R>0.78)和较低的均方根误差(RMSE9.52%)。在季节尺度上,GPM数据与地面站点数据在夏季相关性最高(R>0.8),但均方根误差也最高(RMSE>13.8 mm)。(2)降水强度对GPM产品的探测精度存在影响,降水强度过低(0.1 mm/d)或过高(50 mm/d)对GPM的探测能力均有削弱。(3)流域中部GPM数据和地面站点降水量的相关性较边缘更高;准实时产品在流域西南部绝对误差较大,但经地面站点校正后的GPM-F产品在流域内绝对误差分布较平均;流域内多数站点的GPM数据高估了降水。(4)相比准实时产品,经地面站点校正的GPM-F产品在秋冬季和高强度降水中的精度较准实时GPM-E和GPM-L产品均有提升,但导致了更严重的高估情况。因此,在选择GPM产品进行流域降水分析及水文模拟时,应结合时效性要求、研究的时间尺度和降水强度等条件综合考量,并在研究流域做适当精度评估后选用。
- GF-6与Landsat-8影像在水质监测中的差异性分析
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作者：李弘哲
出版日期：2022-01-01
来源：关键词：6 Landsat 8 水质监测 巢湖 GF 差异性
- 描述：针对GF-6与Landsat-8影像在水质监测中的差异性问题，以巢湖水质富营养状态评价为研究内容，对水质参数进行反演，利用综合营养状态指数法构建水质评价模型。运用ENVI 5.3和ArcGIS 10.3软件，实现各项水质参数和综合营养状态指数TLI可视化。对比实测数据，运用Person相关性模型进行反演结果精度评定。结果表明：影像成像时刻巢湖水质营养状态为中营养；GF-6和Landsat-8反演得到的综合营养状态指数TLI分别为42.75和42.13,两者差别较小，但经过与实测数据的相关性分析可得，GF-6和Landsat-8的Person系数分别为0.988和0.965,表明GF-6反演的数据与实测值相关性更强，更加准确可靠。研究结论可为水质监测中如何选用遥感影像数据提供参考。
- GDP增速合肥居省会城市第四
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作者：王峰
出版日期：2021-07-31
来源：关键词：省会城市 GDP 工业增加值 社会消费品零售总额 合肥市
- 描述：GDP增速合肥居省会城市第四
- G60科创走廊九城市共话“高质量发展”
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作者：徐枫
出版日期：2021-01-01
来源：关键词：长三角 交流大会 安徽省合肥市 科创 松江区 工作交流会 人大常委会 新发展理念
- 描述：10月15日至16日,第四届长三角G60科创走廊九城市人大工作交流会暨"贯彻新发展理念、推进高质量发展"交流大会在安徽省合肥市举行。松江区人大常委会主任唐海东带队出席,松江区人大常委会有关同志、部分在松科创企业人大代表等参加。本次会议由合肥市人大常委会承办。会议期间,松江区、嘉兴市、杭州市、金华市、苏州市、湖州市、宣城市、芜湖市、合肥市等长三角G60科创走廊九城市的人大常委会领导开展了工作交流。
- Feedbacks and Performances of High Efficiency Daliwan Fertilizer on China Cash Crops
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作者：陈宥维
出版日期：2021-01-01
来源：关键词：可持续发展 复合肥 Compound Fertilizer Sustainable Development Fertilizer Reduction and Growing Efficiency Daliwan 大力丸 减肥增效
- 描述：Sustainable development in agriculture is an important guideline for global agricultural development. Since year 2020 global prevalence of the COVID-19 pandemic, and pricing disturbances of fertilizer raw materials, global agricultural sectors are facing enormous pressures. To facilitate fertilizing efficiency, the demand for high efficient agricultural materials is one of the main competencies in the market. This is the first study reporting the open structure interview with farmers collecting their feedback on the performances of compound fertilizer “Daliwan” over the past 4 years of marketing in China. The most mentioned performances on temperate fruits section are better leaf greenness, fruit enlargement, and fruit size evenness, with 31.21%, 47.09% and 37.72%, of farmers responded to these performances. The three most mentioned performances in citrus fruits are bet-ter tree growth, leaf greenness, and fruit enlargement, which are 52.32%, 50.90% and 40.81%, respectively. Vegetable growers are most recognized for the fertilizer performances on bigger leaf area, better leaf greenness, and fruit size evenness, which occupied 44.04%, 43.18%, and 46.18% from the data collected. Eucalyptus tree, forestry tree mostly feedback on leaf greenness (61.54%) and faster bark skinning (45.05%). Labor-saving is the most collected in all feedbacks in all crops. All users strongly responded to feedback on labor-saving and time saving using this fertilizer. “Da-liwan” is proven to enhance efficiency and cut the burden for growers over the past four years in China.
- Excel规划求解在冷混水溶复合肥配方设计中的应用
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作者：刘宇锋
出版日期：2022-01-01
来源：关键词：Excel规划求解 配方设计 冷混水溶复合肥 应用
- 描述：配方设计是水溶复合肥料研发的一项重要技术工作，直接影响水溶复合肥料生产的稳定和产品性能。将Excel 中的规划求解引入冷混水溶复合肥配方设计中，通过原料种类选择、养分含量分析、计算模型确定、变量约束条件设置和目标设置等步骤，可快速准确地计算符合条件的原料配比数值，简化计算过程，提高工作效率，在冷混水溶复合肥配方设计领域具有推广应用价值。
- Effects of nonpoint source pollution from different sources on lake nitrogen and phosphorus: A case study of Chaohu Lake basin.
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作者：IR Akhundov
出版日期：2023-01-01
来源：关键词：redundancy analysis total phosphorus 冗余分析 source Chaohu Lake basin 巢湖流域 non total nitrogen multi 总磷 非点源污染 point source pollution 多来源 总氮
- 描述：This study aimed to clarify the impact of different sources of nonpoint source (NPS) pollution on lake nitrogen and phosphorus. This study was based on a redundancy analysis method that comprehensively considered the five major sources of nonpoint source pollution in the Chaohu Lake basin including planting land, livestock and poultry breeding, aquaculture, rural domestic sewage discharge, and atmospheric deposition. The effects of NPS pollution from multiple sources on lake nitrogen and phosphorus were discussed. Additionally, the impact of different sources was analyzed on the two seasons of the normal and wet water periods. The results showed that the influence of nonpoint source pollution on lake nitrogen and phosphorus in the normal period was slightly higher than that in the wet period, and the interpretation rate of nonpoint source pollution in the normal period could reach 80.5%, whereas that in the wet period was 71.6%. Different sources of non-point source pollution showed certain variations during different rainfall periods. The pollution sources with the most obvious difference in their contribution rates were atmospheric deposition and rural domestic sewage discharge, of which the interpretation rate of atmospheric deposition could reach 46.4% in the wet season and only 6.3% in the normal season. The contribution rate of rural domestic sewage discharge showed the opposite trend. However, the total amounts of the two sources exceeded 50% in both the normal and wet seasons. The effects of nonpoint source pollution from planting land, livestock and poultry breeding as well as aquaculture on lake nitrogen and phosphorus were similar; the interpretation rates of the three factors were between 10% and 20% and the change was relatively small between normal and wet water periods. This study has shown that the impact of atmospheric deposition and discharge of rural domestic sewage on the concentrations of nitrogen and phosphorus in lakes is greatly affected by seasonal factors. Agricultural planting, livestock and poultry breeding, and aquaculture, as the three main forms of agricultural production, should be equally prioritized because of their influence on changes in nitrogen and phosphorus concentrations in lakes.
- Effects of Jiawei Liu\'an Jian on pathomorphology of airway remodeling in rats with cough variant asthma.
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作者：暂无
出版日期：2020-01-01
来源：关键词：大鼠 气道重塑 炎性细胞 Ingredient Decoction) cough variant asthma Jiawei Liu\'an Jian (Supplemented Six inflammatory cells airway remodeling 咳嗽变异性哮喘 加味六安煎 rats
- 描述：Objective To observe the effects of Jiawei Liu\'an Jian (Supplemented Six-Ingredient Decoction, JWLAJ) on airway inflammation and pathological changes of pulmonary tissue remodeling in rats with cough variant asthma (CVA), and to explore its mechanism in treating CVA, so as to provide evidence for clinical treatment. Methods A total of 60 Wistar rats were randomly allocated into normal group, model group, Montelukast sodium (MS) group, and treatment groups including low-dose, mid-dose and high-dose JWLAJ groups. The rats were sensitized with albumin and aluminium hydroxide, and then inhaled albumin to replicate CVA rat models. The infiltration of pulmonary inflammatory cells, the degree of collagen deposition (collagen area and collagen volume fraction) and morphological changes of airway in the lung tissues of rats in each group were observed. Results Compared with the normal group, inflammatory cell infiltration, hyperemia and edema could be observed in the lung tissues under the microscope in the model group. Compared with the model group, the amount of inflammatory cells in the lung tissues were reduced in all treatment groups, and the degrees of hyperemia and edema were also reduced. Collagen area: Compared with the normal group, the collagen area of the model group was increased (P<0.05); compared with each other in the treatment groups, the collagen area decreased most significantly (P<0.05) in the low-dose JWLAJ group; there was no statistically significant difference between the treatment groups and the MS group (P>0.05). Collagen volume fraction: Compared with the normal group, the collagen volume fraction of the model group was increased (P<0.05); compared with each other in treatment groups, the collagen volume fraction decreased most significantly (P<0.05) in the low-dose JWLAJ group; there was no statistically significant difference between the treatment groups and MS group (P>0.05). The airway morphological parameters: Compared with normal group, there was a significant increase in smooth muscle area/bronchial basement membrane diameter (Wam/Pbm), as well as airway wall area/bronchial basement membrane diameter (Wai/Pbm) in the model group (P<0.05). Compared within the treatment groups, the Wam/Pbm, Wai/Pbm ratios were the lowest in low-dose JWLAJ group (P<0.05). There was no statistically significant difference between the MS group and treatment groups (P>0.05). Conclusion JWLAJ could be used to prevent and treat CVA, probably by reducing infiltration, hyperemia and edema of inflammatory cells in lung tissues, reducing collagen deposition surrounding the airway, as well as interfering in airway remodeling.
- EAST装置实现1 056秒长脉冲高参数等离子体运行
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作者：
出版日期：2022-01-01
来源：关键词：托卡马克装置 实验堆 建制化 高温等离子体 世界纪录 中科院合肥 开放共享 创新成果
- 描述：记者从中科院合肥物质科学研究院获悉,2021年12月30日晚,中科院合肥研究院等离子体所EAST控制大厅里,正在运行的国家重大科技基础设施EAST全超导托卡马克装置（东方超环）再次创造新的世界纪录,实现了1 056秒的长脉冲高参数等离子体运行,这是目前世界上托卡马克装置实现的最长时间高温等离子体运行。据悉,EAST装置运行15年来,先后实现了1兆安、1.6亿度、1 056秒的等离子体运行,通过开放共享的建制化管理模式,全面实现了EAST设计参数指标,在稳态等离子体运行的工程和物理上继续保持国际引领。
- DSSAT模型对巢湖流域小麦管理因子模拟和应用研究
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作者：吴春蕾
出版日期：2011-01-01
来源：关键词：产量 DSSAT模型 巢湖流域 小麦生长
- 描述：巢湖流域是安徽省重要的农业区域，小麦的种植在粮食生产的结构中占据了一定的地位，然而不合理的施肥、病虫害影响，再加上多变的自然气候现象导致的产品品质低、产量不高以及由此而产生一系列的环境问题比较突出，严重制约了巢湖社会经济的可持续发展。近年来，信息技术在农业中逐步发展，为传统的农业科技的深入发展开辟了一条新道路，作物模型的成功开发和应用促进了对作物生育规律由定性描述向定量分析的转化过程，其具有较强的机理性、系统性和通用性，可通过灌溉、施肥、播期、密度等一些可调控因子来调节作物的生长、发育的进程，在特定的气候条件下预测作物的产量。本研究基于2007-2010三年中垾镇小麦试验数据基础上，结合小麦的七个遗传参数，运用DSSAT4.0模型进行敏感性分析，并对模型进行调试，以及将生育期、LAI、产量、籽粒重、地上生物量、秸秆量与模型模拟值进行比对校验。再运用校正好的模型，对2009-2010年小麦生长阶段中，在不同播期和播种密度下的生长发育进行模拟，分别观察同一播期，不同密度以及同一密度，不同的播期下，小麦的产量及地上部分生物量的变化，筛选出适合于当地的播种日期与播种密度。同时对2009-2010年小麦生长阶段中，不同施氮水平对小麦的产量、LAI以及对小麦生育期各部位的含N量进行模拟比较。通过以上试验，可以得出以下结论：(1)生育期：对2007-2010这三年的生育期的模拟结果较好，大部分误差都在5%以内，三年的模拟误差大小依次为1.71%、4.00%、8.05%；LAI：对2007-2010这三年中在空白，常规，优化， N减30%这四个施肥处理下，小麦在分蘖期，拔节期，孕穗期，开花期，成熟期的LAI的模拟值与实测值变化趋势趋于一致。从不同的施肥处理LAI结果来看，LAI的平均大小依次是常规﹥优化﹥N减30%﹥空白。产量：对于2007-2010这三年的结果来看，其中2009-2010这一年的模拟值与实测值的相对误差较2007-2008及2008-2009这两年相对较小，在四个指标的模拟误差中，三年产量的平均相对误差最小。(2)2009-2010年密度和播种期试验中可以得出在巢湖市中垾镇小麦的适宜的播种日期是11月7日，播种密度为150株/m~2，在该播种条件下，小麦的产量较高，为6059kg/hm~2，要保证地上收获较多生物量，适宜的播种日期在11月7日，播种密度选在150株/m~2，地上生物量可达到14332kg/hm~2.(3)2009-2010年的N肥试验得出，在适宜的播种密度与播期条件下，随着施N量的提高，小麦产量和LAI都不断增大，增加的幅度呈递减趋势。在不同的生长发育期，各部位N含量变化有差异。拔节期：叶N﹥茎N﹥根N﹥籽粒N；开花期：叶N﹥茎N﹥根N﹥籽粒N；成熟期：籽粒N﹥根N﹥茎N﹥叶N；收获期：籽粒N﹥根N﹥茎N﹥叶N。