连线干涉测量(Connected Element Interferometry,CEI)是一种全天时全天候的被动测角技术,已用于空间目标的跟踪监视.地球静止轨道(Geostationary Earth Orbit,GEO)卫星需要频繁机动以保持轨位或完成其他任务,其机动后的快速轨道恢复能...连线干涉测量(Connected Element Interferometry,CEI)是一种全天时全天候的被动测角技术,已用于空间目标的跟踪监视.地球静止轨道(Geostationary Earth Orbit,GEO)卫星需要频繁机动以保持轨位或完成其他任务,其机动后的快速轨道恢复能力对于监视预警极为重要.针对基于CEI的GEO短弧定轨和预报,分析了定轨算法的形亏和数亏,在附加先验轨道约束的短弧定轨基础上,提出了轨道半长轴初值的自适应优化方法.利用亚太七号卫星的CEI仿真和实测数据进行了短弧定轨和预报,实验结果表明,采用优化后的半长轴初值,30min短弧定轨和10min预报的卫星位置分量精度均优于4km,能够满足非合作GEO目标机动后快速轨道恢复的需求.展开更多
To integrate different renewable energy resources effectively in a microgrid, a configuration optimization model of a multi-energy distributed generation（DG） system and its auxiliary equipment is proposed. The model...To integrate different renewable energy resources effectively in a microgrid, a configuration optimization model of a multi-energy distributed generation（DG） system and its auxiliary equipment is proposed. The model mainly consists of two parts, the determination of initial configuration schemes according to user preference and the selection of the optimal scheme. The comprehensive evaluation index（CEI）, which is acquired through the analytic hierarchy process（AHP） weight calculation method, is adopted as the evaluation criterion to rank the initial schemes. The optimal scheme is obtained according to the ranking results. The proposed model takes the diversity of different equipment parameters and investment cost into consideration and can give relatively suitable and economical suggestions for system configuration.Additionally, unlike Homer Pro, the proposed model considers the complementation of different renewable energy resources, and thus the rationality of the multi-energy DG system is improved compared with the single evaluation criterion method which only considers the total cost.展开更多
This study almed to screen a highIy efficient ceI uIose-degrading compIex microbial system from soiI and rotten straw and then study its appIication to natural ceI uIose. The isoIated stralns were preIiminariIy screen...This study almed to screen a highIy efficient ceI uIose-degrading compIex microbial system from soiI and rotten straw and then study its appIication to natural ceI uIose. The isoIated stralns were preIiminariIy screened with Congo red stalning and the ceI uIases activities were determined with DNS method. The non-antagonis-tic highIy efficient ceI uIos-degrading stralns were seIected and cuItured combinedIy for deveIoping a ceI uIose-degrading compIex microbial system. The resuIts showed that the CMC enzyme activity of the mixed cuIture of the three fungi stralns was higher than those of the cuItures of the three singIe stralns. The morphoIogical and moIecuIar bioIogical identification indicated that F1 was Botryosphaeria, F2 was Rhi-zopus oryzae, and F5 was Fusarium oxysporum. When straw was used as carbon source, the CMC enzyme activities of F1, F2 and F5 were 39.2, 31.4 and 40.6 IU/mI, respectiveIy; whiIe the CMC enzyme activity of the mixed cuIture of F1＋F2＋F5 was 50.12 IU/mI, which was increased by 23% compared to that of the singIe straln of F5. The experimental resuIts indicated that the ceI uIose-degrading effect of the compIex microbial system was better than those of the singIe fungi stralns, and the singIe stralns of F1, F2 and F5 had certaln deveIopment potentials.展开更多
Na-Se batteries have caught tremendous attention because of natural abundant of element sodium and their high volumetric energy density(2530 Wh/L).However,the low utilization ratio of Se is the main obstacle for pract...Na-Se batteries have caught tremendous attention because of natural abundant of element sodium and their high volumetric energy density(2530 Wh/L).However,the low utilization ratio of Se is the main obstacle for practical application.Herein,an advanced Se-based electrode is designed and prepared by using tea stem-derived micropore carbon matrix(TSC)as Se host and coating TSC/Se with cyclic polyacrylonitrile(cPAN).TSC/Se/cPAN electrode shows rate capacity of 318.3 mAh/g at 2 C(1 C=675 mA/g)and great discharge capacity of 420.6 mAh/g after 300 cycles at 0.2 C.The impressive electrochemical performance is mainly ascribed to the interface design of c PAN coating,resulting in the enhanced electronic conductivity of whole electrode and high ratio of robust inorganic salt NaCl in CEI film.The TSC/Se/c PAN||NVP full cell also exhibits great discharge capacity of 556.6 mAh/g after 55 cycles at 0.1 C.展开更多
文摘连线干涉测量(Connected Element Interferometry,CEI)是一种全天时全天候的被动测角技术,已用于空间目标的跟踪监视.地球静止轨道(Geostationary Earth Orbit,GEO)卫星需要频繁机动以保持轨位或完成其他任务,其机动后的快速轨道恢复能力对于监视预警极为重要.针对基于CEI的GEO短弧定轨和预报,分析了定轨算法的形亏和数亏,在附加先验轨道约束的短弧定轨基础上,提出了轨道半长轴初值的自适应优化方法.利用亚太七号卫星的CEI仿真和实测数据进行了短弧定轨和预报,实验结果表明,采用优化后的半长轴初值,30min短弧定轨和10min预报的卫星位置分量精度均优于4km,能够满足非合作GEO目标机动后快速轨道恢复的需求.
基金The National Natural Science Foundation of China(No.51377021)the Science and Technology Project of State Grid Corporation of China(No.SGTJDK00DWJS1600014)
文摘To integrate different renewable energy resources effectively in a microgrid, a configuration optimization model of a multi-energy distributed generation（DG） system and its auxiliary equipment is proposed. The model mainly consists of two parts, the determination of initial configuration schemes according to user preference and the selection of the optimal scheme. The comprehensive evaluation index（CEI）, which is acquired through the analytic hierarchy process（AHP） weight calculation method, is adopted as the evaluation criterion to rank the initial schemes. The optimal scheme is obtained according to the ranking results. The proposed model takes the diversity of different equipment parameters and investment cost into consideration and can give relatively suitable and economical suggestions for system configuration.Additionally, unlike Homer Pro, the proposed model considers the complementation of different renewable energy resources, and thus the rationality of the multi-energy DG system is improved compared with the single evaluation criterion method which only considers the total cost.
基金Supported by Key Program for International S&T Cooperation Projects of China(2012DFA30600)National Key Technology Research and Development Program(2012BAD29B06)Special Scientific Research Fund of Marine Public Welfare Profession of China(201305013)~~
文摘This study almed to screen a highIy efficient ceI uIose-degrading compIex microbial system from soiI and rotten straw and then study its appIication to natural ceI uIose. The isoIated stralns were preIiminariIy screened with Congo red stalning and the ceI uIases activities were determined with DNS method. The non-antagonis-tic highIy efficient ceI uIos-degrading stralns were seIected and cuItured combinedIy for deveIoping a ceI uIose-degrading compIex microbial system. The resuIts showed that the CMC enzyme activity of the mixed cuIture of the three fungi stralns was higher than those of the cuItures of the three singIe stralns. The morphoIogical and moIecuIar bioIogical identification indicated that F1 was Botryosphaeria, F2 was Rhi-zopus oryzae, and F5 was Fusarium oxysporum. When straw was used as carbon source, the CMC enzyme activities of F1, F2 and F5 were 39.2, 31.4 and 40.6 IU/mI, respectiveIy; whiIe the CMC enzyme activity of the mixed cuIture of F1＋F2＋F5 was 50.12 IU/mI, which was increased by 23% compared to that of the singIe straln of F5. The experimental resuIts indicated that the ceI uIose-degrading effect of the compIex microbial system was better than those of the singIe fungi stralns, and the singIe stralns of F1, F2 and F5 had certaln deveIopment potentials.
基金financially supported by Fujian Science and Technology Planning Projects of China(Nos.2022T3067 and 2023H0045)the Self-deployment Project Research Programs of Haixi Institutes,Chinese Academy of Sciences(No.CXZX2022-JQ12)the XIREM autonomously deployment project(No.2023GG02)。
文摘Na-Se batteries have caught tremendous attention because of natural abundant of element sodium and their high volumetric energy density(2530 Wh/L).However,the low utilization ratio of Se is the main obstacle for practical application.Herein,an advanced Se-based electrode is designed and prepared by using tea stem-derived micropore carbon matrix(TSC)as Se host and coating TSC/Se with cyclic polyacrylonitrile(cPAN).TSC/Se/cPAN electrode shows rate capacity of 318.3 mAh/g at 2 C(1 C=675 mA/g)and great discharge capacity of 420.6 mAh/g after 300 cycles at 0.2 C.The impressive electrochemical performance is mainly ascribed to the interface design of c PAN coating,resulting in the enhanced electronic conductivity of whole electrode and high ratio of robust inorganic salt NaCl in CEI film.The TSC/Se/c PAN||NVP full cell also exhibits great discharge capacity of 556.6 mAh/g after 55 cycles at 0.1 C.
