电力物联网建设尚处于起步阶段,为寻找关键技术突破点和创新路径提出基于自然语言处理和互信息的电力物联网技术协同创新研究方法。从电力系统和物联网两个方面将电力物联网划分为8个技术子领域,包括电力“源-网-荷-储”以及物联网感知...电力物联网建设尚处于起步阶段,为寻找关键技术突破点和创新路径提出基于自然语言处理和互信息的电力物联网技术协同创新研究方法。从电力系统和物联网两个方面将电力物联网划分为8个技术子领域,包括电力“源-网-荷-储”以及物联网感知层、网络层、计算层、应用层,并收集与子领域相关的Web of Science文献数据。基于自然语言处理技术提取文献中关键技术术语,构建术语-领域共现矩阵。在此基础上,采用互信息理论研究电力物联网技术子领域间协同关系。所提方法解析出了突现型、渐缓型、波动型和增长型四类电力物联网创新技术,研究发现电力源-储端、源-应用层互动强度最高,攻关新能源发电、储能以及物联网关键技术,创新领域交叉新兴技术应用是电力物联网建设的重点,研究结论为电力物联网技术创新发展提供了借鉴。展开更多
In order to evaluate the feasibility of safe mining close to the contact zone under reduced security coal pillar conditions at a coal mine in eastern China, the interaction mechanism of the interface between deep buri...In order to evaluate the feasibility of safe mining close to the contact zone under reduced security coal pillar conditions at a coal mine in eastern China, the interaction mechanism of the interface between deep buried sand and a paleo-weathered rock mass was investigated in the laboratory by direct shear testing. A DRS-1 high pressure soil shear testing machine and orthogonal design method were used in the direct shear tests. Variance and range methods were applied to analyze the sensitivity of each factor that has an influence on the mechanical characters of the interface. The test results show that the normal pressure is the main influencing factor for mechanical characteristics of the interface, while the lithological characters and roughness are minor factors; the shear stress against shear displacement curve for the interface shows an overall hyperbola relationship, no obvious peak stress and dilatancy was observed.When the normal pressure is 6 MPa, the shear strengths of interfaces with different roughness are basically the same, and when the normal pressure is more than 8 MPa, the larger the roughness of the interface, the larger will be the shear strength; the shear strength has a better linear relationship with the normal pressure, which can be described by a linear Mohr–Coulomb criterion.展开更多
文摘电力物联网建设尚处于起步阶段,为寻找关键技术突破点和创新路径提出基于自然语言处理和互信息的电力物联网技术协同创新研究方法。从电力系统和物联网两个方面将电力物联网划分为8个技术子领域,包括电力“源-网-荷-储”以及物联网感知层、网络层、计算层、应用层,并收集与子领域相关的Web of Science文献数据。基于自然语言处理技术提取文献中关键技术术语,构建术语-领域共现矩阵。在此基础上,采用互信息理论研究电力物联网技术子领域间协同关系。所提方法解析出了突现型、渐缓型、波动型和增长型四类电力物联网创新技术,研究发现电力源-储端、源-应用层互动强度最高,攻关新能源发电、储能以及物联网关键技术,创新领域交叉新兴技术应用是电力物联网建设的重点,研究结论为电力物联网技术创新发展提供了借鉴。
基金the National Natural Science Foundation of China(Nos.41172290 and40572160)
文摘In order to evaluate the feasibility of safe mining close to the contact zone under reduced security coal pillar conditions at a coal mine in eastern China, the interaction mechanism of the interface between deep buried sand and a paleo-weathered rock mass was investigated in the laboratory by direct shear testing. A DRS-1 high pressure soil shear testing machine and orthogonal design method were used in the direct shear tests. Variance and range methods were applied to analyze the sensitivity of each factor that has an influence on the mechanical characters of the interface. The test results show that the normal pressure is the main influencing factor for mechanical characteristics of the interface, while the lithological characters and roughness are minor factors; the shear stress against shear displacement curve for the interface shows an overall hyperbola relationship, no obvious peak stress and dilatancy was observed.When the normal pressure is 6 MPa, the shear strengths of interfaces with different roughness are basically the same, and when the normal pressure is more than 8 MPa, the larger the roughness of the interface, the larger will be the shear strength; the shear strength has a better linear relationship with the normal pressure, which can be described by a linear Mohr–Coulomb criterion.
