On March 19, the construction of a 10-MW photovoltaic power plant and a 1 000-kW new type geothermal power generation project were started by Guodian Longyuan Group in Yanbajing Town, Dangxiong County of Tibet.
The wind power generation project is a very complex project. In the actual construction process, it not only requires the coordination of all aspects, but also needs to implement the whole process and dynamic supervis...The wind power generation project is a very complex project. In the actual construction process, it not only requires the coordination of all aspects, but also needs to implement the whole process and dynamic supervision in the field management. Through taking effective management measures on the construction site, it can ensure the construction efficiency and improve the construction quality of the wind power generation project.展开更多
With the rapid development of China's economy, various fields in China are constantly innovating and reforming in the process of development, so as to meet the requirements of personalization in the new era. Photo...With the rapid development of China's economy, various fields in China are constantly innovating and reforming in the process of development, so as to meet the requirements of personalization in the new era. Photovoltaic power generation projects have a very important influence and function on the development of China's photovoltaic industry in the planning and construction process. Especially at the present stage, the construction scope of China's electric power engineering projects is constantly expanding, and the number of construction projects is also constantly increasing. At present, the traditional operation mode has been difficult to meet the personalized demand of photovoltaic power generation. In order to ensure the project quality, it is necessary to strengthen the whole process management of photovoltaic power generation projects.展开更多
Since the release of the first version of the 5th generation(5G) mobile networks standard: Release-15(Rel-15), the 3rd Generation Partnership Project(3GPP) made significant efforts in the field of indoor and outdoor w...Since the release of the first version of the 5th generation(5G) mobile networks standard: Release-15(Rel-15), the 3rd Generation Partnership Project(3GPP) made significant efforts in the field of indoor and outdoor wireless positioning. Notably, Release-16(Rel-16) augmented support for enhanced mobile broadband(eMBB) and ultra-reliable low-latency communication(uRLLC), particularly within complex indoor settings. To further meet the diverse application needs of positioning scenarios, the 3GPP standards for Release-17(Rel-17) and Release-18(Rel-18) propose new enhancement measures to continuously provide more accurate positioning services. In this paper, the scholarly discourse on 5G positioning was critically examined, providing a systematic review of the 5G positioning standards as delineated in 3GPP's Rel-16 and Rel-17, and extended the discussion to the anticipated enhancements in 5G Rel-18, along with their underlying motivations. Through these discussions, not only a comprehensive perspective on the current development of 5G positioning technology was provided but also forward-looking analysis and predictions for the evolution of positioning technology in the upcoming 3GPP Release-19(Rel-19) was offered. Additionally, it serves as a reference for researchers interested in understanding the development of positioning within the standard framework in the field of 5G indoor positioning, which holds significant meaning for promoting research and application of 5G positioning technology.展开更多
Let S be a semigroup with identity and zero,（S）the category of finitely generated projective S-systems.In this paper,the Whitehead group K<sub>1</sub>S of S is defined to be K<sub>0</sub>Ω（...Let S be a semigroup with identity and zero,（S）the category of finitely generated projective S-systems.In this paper,the Whitehead group K<sub>1</sub>S of S is defined to be K<sub>0</sub>Ω（S）, where Ω（S）is the Loop category of（S）,and the structure of K<sub>1</sub>S is given.展开更多
This article presents downlink initial synchronization and cell identification algorithms for long term evolution （LTE） of third-generation （3G） mobile communication systems, which are based on synchronization cha...This article presents downlink initial synchronization and cell identification algorithms for long term evolution （LTE） of third-generation （3G） mobile communication systems, which are based on synchronization channel （SCH） and cell specific pilot symbols, respectively. The key features of the proposed scheme are： it can improve performance of the frequency synchronization through oversampling of the SCH, it can support a large number of target cells by modulating a cell-specific pilot sequence over two symbols within a subframe, and it can guarantee cell identification performance by maximally ratio combining the frequency domain differential cross-correlation. Simulations show that the proposed scheme has a potential use in 3G LTE.展开更多
文摘On March 19, the construction of a 10-MW photovoltaic power plant and a 1 000-kW new type geothermal power generation project were started by Guodian Longyuan Group in Yanbajing Town, Dangxiong County of Tibet.
文摘The wind power generation project is a very complex project. In the actual construction process, it not only requires the coordination of all aspects, but also needs to implement the whole process and dynamic supervision in the field management. Through taking effective management measures on the construction site, it can ensure the construction efficiency and improve the construction quality of the wind power generation project.
文摘With the rapid development of China's economy, various fields in China are constantly innovating and reforming in the process of development, so as to meet the requirements of personalization in the new era. Photovoltaic power generation projects have a very important influence and function on the development of China's photovoltaic industry in the planning and construction process. Especially at the present stage, the construction scope of China's electric power engineering projects is constantly expanding, and the number of construction projects is also constantly increasing. At present, the traditional operation mode has been difficult to meet the personalized demand of photovoltaic power generation. In order to ensure the project quality, it is necessary to strengthen the whole process management of photovoltaic power generation projects.
基金supported by the National Natural Science Foundation of China (62372049)。
文摘Since the release of the first version of the 5th generation(5G) mobile networks standard: Release-15(Rel-15), the 3rd Generation Partnership Project(3GPP) made significant efforts in the field of indoor and outdoor wireless positioning. Notably, Release-16(Rel-16) augmented support for enhanced mobile broadband(eMBB) and ultra-reliable low-latency communication(uRLLC), particularly within complex indoor settings. To further meet the diverse application needs of positioning scenarios, the 3GPP standards for Release-17(Rel-17) and Release-18(Rel-18) propose new enhancement measures to continuously provide more accurate positioning services. In this paper, the scholarly discourse on 5G positioning was critically examined, providing a systematic review of the 5G positioning standards as delineated in 3GPP's Rel-16 and Rel-17, and extended the discussion to the anticipated enhancements in 5G Rel-18, along with their underlying motivations. Through these discussions, not only a comprehensive perspective on the current development of 5G positioning technology was provided but also forward-looking analysis and predictions for the evolution of positioning technology in the upcoming 3GPP Release-19(Rel-19) was offered. Additionally, it serves as a reference for researchers interested in understanding the development of positioning within the standard framework in the field of 5G indoor positioning, which holds significant meaning for promoting research and application of 5G positioning technology.
文摘Let S be a semigroup with identity and zero,（S）the category of finitely generated projective S-systems.In this paper,the Whitehead group K<sub>1</sub>S of S is defined to be K<sub>0</sub>Ω（S）, where Ω（S）is the Loop category of（S）,and the structure of K<sub>1</sub>S is given.
基金the Cooperative Research between Beijing University of Posts and Telecommunications and TD Tech Ltd. and the National Natural Science Foundation of China （60302025）.
文摘This article presents downlink initial synchronization and cell identification algorithms for long term evolution （LTE） of third-generation （3G） mobile communication systems, which are based on synchronization channel （SCH） and cell specific pilot symbols, respectively. The key features of the proposed scheme are： it can improve performance of the frequency synchronization through oversampling of the SCH, it can support a large number of target cells by modulating a cell-specific pilot sequence over two symbols within a subframe, and it can guarantee cell identification performance by maximally ratio combining the frequency domain differential cross-correlation. Simulations show that the proposed scheme has a potential use in 3G LTE.
