This paper summarizes the requirements for modern maritime wireless communication networks in the marine environments including the sea-to-sea and sea-to-shore communication scenarios.The existing maritime wireless co...This paper summarizes the requirements for modern maritime wireless communication networks in the marine environments including the sea-to-sea and sea-to-shore communication scenarios.The existing maritime wireless communication systems are presented and the development of the state-of-the-art maritime communication systems is surveyed.Furthermore,a hierarchical and integrated maritime network architecture is proposed to satisfy the increasing various classes of services which demand different Quality of Service(QoS).Finally,the open issues for further development of maritime communications are identified.展开更多
氧化钛/氧化锆/碳三层结构钙钛矿太阳能电池(Perovskite solar cells,PSCs)具有原材料廉价、制备工艺易放大和稳定性好等优势,受到了广泛关注。但三层结构PSCs的低温制备研究进展缓慢,主要原因之一在于难以在低温条件下构建合适的氧化...氧化钛/氧化锆/碳三层结构钙钛矿太阳能电池(Perovskite solar cells,PSCs)具有原材料廉价、制备工艺易放大和稳定性好等优势,受到了广泛关注。但三层结构PSCs的低温制备研究进展缓慢,主要原因之一在于难以在低温条件下构建合适的氧化锆间隔层。本研究以尿素为孔隙率调节剂,用简单的喷涂法制备多孔氧化锆间隔层用于三层结构PSCs。通过调节喷涂次数优化氧化锆层厚度为1100 nm时,电池的性能最优,单电池功率转换效率达到14.7%,5块电池串联模块(5×0.9 cm×2.5 cm)达到10.8%。PSCs在恒温恒湿箱(25℃,湿度40%)保存200 d,功率转换效率保持稳定,没有明显下降。柔性基底上的氧化锆层经50次弯曲测试后保持完整,未见脱落。与传统的丝网印刷氧化锆间隔层制备方法相比,本研究的喷涂方法具有方法简便、操作温度低、与柔性基底兼容性好的优点。展开更多
It is difficult to quantify and certify the greenhouse gas(GHG)emission reduction in the entire process of a project of carbon capture,utilization and storage(CCUS)-enhanced oil recovery(EOR).Under the methodological ...It is difficult to quantify and certify the greenhouse gas(GHG)emission reduction in the entire process of a project of carbon capture,utilization and storage(CCUS)-enhanced oil recovery(EOR).Under the methodological framework for GHG voluntary emission reduction project,the carbon emission reduction accounting method for CCUS-EOR project was established after examining the accounting boundaries in process links,the baseline emission and project emission accounting methods,and the emission and leakage quantification and prediction models,in order to provide a certification basis for the quantification of GHG emission reduction in the CCUS-EOR project.Based on the data of energy consumption,emission and leakage monitoring of the CCUS-EOR industrial demonstration project in Jilin Oilfield,the net emission reduction efficiency is determined to be about 91.1%at the current storage efficiency of 80%.The accounting and prediction of carbon emission reduction for CCUS-EOR projects with different concentrations and scales indicate that within the project accounting boundary,the certified net emission reduction efficiency of the low-concentration gas source CCUS-EOR projects represented by coal-fired power plants is about 37.1%,and the certified net emission reduction efficiency of the high-concentration gas source CCUS-EOR projects represented by natural gas hydrogen production is about 88.9%.The proposed method is applicable to the carbon emission reduction accounting for CCUS-EOR projects under multiple baseline scenarios during the certification period,which can provide decision-making basis for the planning and deployment of CCUS-EOR projects.展开更多
基金the "Program for Promoting Maritime Economies with Science and Technology" in Tianjin，the National Natural Science Foundation of China，the Tianjin Research Program of Application Foundation and Advanced Technology，the National Science and Technology Major Project，Seed Foundation of Tianjin University
文摘This paper summarizes the requirements for modern maritime wireless communication networks in the marine environments including the sea-to-sea and sea-to-shore communication scenarios.The existing maritime wireless communication systems are presented and the development of the state-of-the-art maritime communication systems is surveyed.Furthermore,a hierarchical and integrated maritime network architecture is proposed to satisfy the increasing various classes of services which demand different Quality of Service(QoS).Finally,the open issues for further development of maritime communications are identified.
基金National Natural Science Foundation of China(52162020)Jiangxi Provincial Natural Science Foundation(20202BABL203012)Jiangxi Province Key Laboratory of Synthetic Chemistry(202005)。
文摘氧化钛/氧化锆/碳三层结构钙钛矿太阳能电池(Perovskite solar cells,PSCs)具有原材料廉价、制备工艺易放大和稳定性好等优势,受到了广泛关注。但三层结构PSCs的低温制备研究进展缓慢,主要原因之一在于难以在低温条件下构建合适的氧化锆间隔层。本研究以尿素为孔隙率调节剂,用简单的喷涂法制备多孔氧化锆间隔层用于三层结构PSCs。通过调节喷涂次数优化氧化锆层厚度为1100 nm时,电池的性能最优,单电池功率转换效率达到14.7%,5块电池串联模块(5×0.9 cm×2.5 cm)达到10.8%。PSCs在恒温恒湿箱(25℃,湿度40%)保存200 d,功率转换效率保持稳定,没有明显下降。柔性基底上的氧化锆层经50次弯曲测试后保持完整,未见脱落。与传统的丝网印刷氧化锆间隔层制备方法相比,本研究的喷涂方法具有方法简便、操作温度低、与柔性基底兼容性好的优点。
基金Supported by the PetroChina Science and Technology Project (2021ZZ01-06,2021DJ1101)。
文摘It is difficult to quantify and certify the greenhouse gas(GHG)emission reduction in the entire process of a project of carbon capture,utilization and storage(CCUS)-enhanced oil recovery(EOR).Under the methodological framework for GHG voluntary emission reduction project,the carbon emission reduction accounting method for CCUS-EOR project was established after examining the accounting boundaries in process links,the baseline emission and project emission accounting methods,and the emission and leakage quantification and prediction models,in order to provide a certification basis for the quantification of GHG emission reduction in the CCUS-EOR project.Based on the data of energy consumption,emission and leakage monitoring of the CCUS-EOR industrial demonstration project in Jilin Oilfield,the net emission reduction efficiency is determined to be about 91.1%at the current storage efficiency of 80%.The accounting and prediction of carbon emission reduction for CCUS-EOR projects with different concentrations and scales indicate that within the project accounting boundary,the certified net emission reduction efficiency of the low-concentration gas source CCUS-EOR projects represented by coal-fired power plants is about 37.1%,and the certified net emission reduction efficiency of the high-concentration gas source CCUS-EOR projects represented by natural gas hydrogen production is about 88.9%.The proposed method is applicable to the carbon emission reduction accounting for CCUS-EOR projects under multiple baseline scenarios during the certification period,which can provide decision-making basis for the planning and deployment of CCUS-EOR projects.
