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线损是综合反映电力网规划设计、生产运行和经营管理水平的一项重要经济技术指标。青海省集中式大规模光伏接入对电网网损产生一定影响,通过对某电网典型历史代表日24个整点理论线损计算结果进行分析,对典型方式及不同开机组合方式下新能源出力对线损的影响进行分析,总结出新能源出力变化对线损影响的变化规律,为研究大规模光伏发电系统接入电网提供技术依据。

关键词：新能源线损供电量

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连续逆向色谱电泳过程

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化工学报 1999年第2期50卷 191-199页

作者：赵平王世昌天津大学化工研究所天津300072

连续CACE过程借助流场和逆向电场的共同作用,使目标蛋白质在分离柱富集区内连续富集。本文提出了连续CACE分离柱内浓度分布微分方程和定解条件,并对方程进行了求解。解决了富集区内目标蛋白质浓度的在线检测,用牛血红蛋白和细胞色素C在... 详细信息

连续CACE过程借助流场和逆向电场的共同作用,使目标蛋白质在分离柱富集区内连续富集。本文提出了连续CACE分离柱内浓度分布微分方程和定解条件,并对方程进行了求解。解决了富集区内目标蛋白质浓度的在线检测,用牛血红蛋白和细胞色素C在两套连续CACE装置上进行实验研究,取得了预期效果。

关键词：色谱电泳蛋白质 CACE 连续逆向测定

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Effects of freeze–thaw cycles on soil N_2O concentration and flux in the permafrost regions of the Qinghai–Tibetan Plateau

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Research in Cold and Arid Regions 2018年第1期10卷 69-79页

作者： ShengYun Chen Qian zhao WenJie Liu zhao Zhang Shuo Li HongLin Li ZhongNan Nie LingXi Zhou shichang Kang Qilian Shan Station of Glaciology and Ecologic Environment State Key Laboratory of Cryospheric ScienceNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouGansu 730000China Institute of Tropical Agriculture and Forestry Hainan UniversityHaikouHainan 570228China State Key Laboratory of Plateau Ecology and Agriculture Qinghai UniversityXiningQinghai 810016China Department of Economic Development JobsTransport and ResourcesPrivate Bag 105Hamilton VIC 3300Australia Chinese Academy of Meteorological Sciences Beijing 100081China University of Chinese Academy of Sciences Beijing 100049China

Nitrous oxide(N_2 O) is one of the most important greenhouse gases in the atmosphere; freeze–thaw cycles(FTCs) might strongly influence the emission of soil N_2 O on the Qinghai–Tibetan Plateau(QTP). However, there is a lack of in situ research on the characteristics of soil N_2 O concentration and flux in response to variations in soil properties caused by ***, we report the effect of FTC-induced changes in soil properties on the soil N_2 O concentration and flux in the permafrost region of the higher reaches of the Shule River Basin on the northeastern margin of the QTP. We measured chemical properties of the topsoil, activities of soil microorganisms, and air temperature(AT), as well as soil N_2 O concentration and flux, over an annual cycle from July 31, 2011, to July 30, 2012. The results showed that soil N_2 O concentration was significantly affected by soil temperature(ST), soil moisture(SM), soil salinity(SS), soil polyphenol oxidase(SPO), soil alkaline phosphatase(SAP), and soil culturable actinomycetes(SCA), ranked as SM>SS>ST>SPO>SAP>SCA, whereas ST significantly increased soil N_2 O flux, compared with SS. Overall, our study indicated that the soil N_2 O concentration and flux in permafrost zone FTCs were strongly affected by soil properties, especially soil moisture, soil salinity, and soil temperature.

关键词： freeze-thaw cycles soil environment N2O

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Breeding of a New Medium Indica Variety Liangyou 7968 with Good Quality and Disease Resistance

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Agricultural Biotechnology 2024年第5期13卷 10-13页

作者： Dewen ZHANG Yongjun zhao shichang HU Institute of Rice Research Anhui Academy of Agricultural SciencesHefei 230031China Feidong Hu Panpan Family Farm Feidong 236122China Feidong shichang Rice Planting Professional Cooperative Feidong 236122China

With global warming and frequent occurrence of severe weather,rice diseases are also on the ***,the breeding of new rice varieties with disease resistance is still the breeding direction for rice breeding experts."Liangyou 7968"is a new hybrid rice combination with double resistance to bacterial blight and rice *** paper introduced the breeding process,characteristics,high-yielding cultivation techniques and high-yielding seed production technical regulations for Liangyou 7968.

关键词： Disease resistance Liangyou 7968 Breeding research

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