On the basis of an initial introduction to the status quo in the worldwide research on mobile Internet technologies, this paper presents the problems encountered during the research and points out some key points and ...On the basis of an initial introduction to the status quo in the worldwide research on mobile Internet technologies, this paper presents the problems encountered during the research and points out some key points and research goals in this field. It infers that it is necessary to perform research on issues such as new Internet routing theories and protocols, structural characteristics of changing networks, multicast theories in mobile Internet environment and IPv6-based wireless IP network theories.展开更多
Through 40 years development Ti hasbecame an important military and civil in-dustry material called "Air"—"Land"—"Ocean"metal.Ti is an ideal structurematerial and corrosion resistant ma...Through 40 years development Ti hasbecame an important military and civil in-dustry material called "Air"—"Land"—"Ocean"metal.Ti is an ideal structurematerial and corrosion resistant material,which has bright future in the developmentof modern technology.展开更多
Development of agri-culture and animalhusbandry in Tibetover the past 50years has played animportant role in local eco-nomic development. However,with China’s accession to theWTO,the goal of agriculturalproduction an...Development of agri-culture and animalhusbandry in Tibetover the past 50years has played animportant role in local eco-nomic development. However,with China’s accession to theWTO,the goal of agriculturalproduction and livestockbreeding is changing fromproviding the public with foodto increasing the income offarmers and herders. Whilethe public shows more con-cern for market economicdevelopment and protection展开更多
Graphene, a two-dimensional material with outstanding electrical and mechanical properties, has attracted considerable attention in the field of semiconductor technologies due to its potential use as a buffer layer fo...Graphene, a two-dimensional material with outstanding electrical and mechanical properties, has attracted considerable attention in the field of semiconductor technologies due to its potential use as a buffer layer for the epitaxial Ⅲ-nitride growth. In recent years, significant progress has been made in the chemical vapor deposition growth of graphene on various insulating substrates for the nitride epitaxy, which offers a facile, inexpensive, and easily scalable methodology. However, certain challenges are still present in the form of producing high-quality graphene and achieving optimal interface compatibility with Ⅲ-nitride materials.In this review, we provide an overview of the bottlenecks associated with the transferred graphene fabrication techniques and the state-of-the-art techniques for the transfer-free graphene growth. The present contribution highlights the current progress in the transfer-free graphene growth on different insulating substrates, including sapphire, quartz, SiO_(2)/Si, and discusses the potential applications of transfer-free graphene in the Ⅲ-nitride epitaxy. Finally, it includes the prospects of the transfer-free graphene growth for the Ⅲ-nitride epitaxy and the challenges that should be overcome to realize its full potential in this field.展开更多
Few-layer molybdenum disulfide（MoS2） is emerging as a promising quasi-two-dimensional material for photonics and optoelectronics, further extending the library of suitable layered nanomaterials with exceptional opti...Few-layer molybdenum disulfide（MoS2） is emerging as a promising quasi-two-dimensional material for photonics and optoelectronics, further extending the library of suitable layered nanomaterials with exceptional optical properties for use in saturable absorber devices that enable short-pulse generation in laser systems. In this work, we catalog and review the nonlinear optical properties of few-layer MoS2, summarize recent progress in processing and integration into saturable absorber devices, and comment on the current status and future perspectives of MoS2-based pulsed lasers.展开更多
Recently,the 2016 Lithium Industry Forum,an event hosted by the China Nonferrous Metals Industry Association Lithium Branch,opened in Xining,Qinghai Province.Li Bingxin,Deputy Secretary-general of the China Nonferrous...Recently,the 2016 Lithium Industry Forum,an event hosted by the China Nonferrous Metals Industry Association Lithium Branch,opened in Xining,Qinghai Province.Li Bingxin,Deputy Secretary-general of the China Nonferrous Metals Industry Association Lithium Branch,shared the operation展开更多
文摘On the basis of an initial introduction to the status quo in the worldwide research on mobile Internet technologies, this paper presents the problems encountered during the research and points out some key points and research goals in this field. It infers that it is necessary to perform research on issues such as new Internet routing theories and protocols, structural characteristics of changing networks, multicast theories in mobile Internet environment and IPv6-based wireless IP network theories.
文摘Through 40 years development Ti hasbecame an important military and civil in-dustry material called "Air"—"Land"—"Ocean"metal.Ti is an ideal structurematerial and corrosion resistant material,which has bright future in the developmentof modern technology.
文摘Development of agri-culture and animalhusbandry in Tibetover the past 50years has played animportant role in local eco-nomic development. However,with China’s accession to theWTO,the goal of agriculturalproduction and livestockbreeding is changing fromproviding the public with foodto increasing the income offarmers and herders. Whilethe public shows more con-cern for market economicdevelopment and protection
基金supported by the National Key R&D Program of China(2019YFA0708204)National Natural Science Foundation of China(T2188101)+1 种基金Science Fund for Distinguished Young Scholars of Jiangsu Province(BK20211503)Jiangsu Funding Program for Excellent Postdoctoral Talent(2022ZB595)。
文摘Graphene, a two-dimensional material with outstanding electrical and mechanical properties, has attracted considerable attention in the field of semiconductor technologies due to its potential use as a buffer layer for the epitaxial Ⅲ-nitride growth. In recent years, significant progress has been made in the chemical vapor deposition growth of graphene on various insulating substrates for the nitride epitaxy, which offers a facile, inexpensive, and easily scalable methodology. However, certain challenges are still present in the form of producing high-quality graphene and achieving optimal interface compatibility with Ⅲ-nitride materials.In this review, we provide an overview of the bottlenecks associated with the transferred graphene fabrication techniques and the state-of-the-art techniques for the transfer-free graphene growth. The present contribution highlights the current progress in the transfer-free graphene growth on different insulating substrates, including sapphire, quartz, SiO_(2)/Si, and discusses the potential applications of transfer-free graphene in the Ⅲ-nitride epitaxy. Finally, it includes the prospects of the transfer-free graphene growth for the Ⅲ-nitride epitaxy and the challenges that should be overcome to realize its full potential in this field.
基金support from the Royal Academy of Engineering (RAEng)
文摘Few-layer molybdenum disulfide（MoS2） is emerging as a promising quasi-two-dimensional material for photonics and optoelectronics, further extending the library of suitable layered nanomaterials with exceptional optical properties for use in saturable absorber devices that enable short-pulse generation in laser systems. In this work, we catalog and review the nonlinear optical properties of few-layer MoS2, summarize recent progress in processing and integration into saturable absorber devices, and comment on the current status and future perspectives of MoS2-based pulsed lasers.
文摘Recently,the 2016 Lithium Industry Forum,an event hosted by the China Nonferrous Metals Industry Association Lithium Branch,opened in Xining,Qinghai Province.Li Bingxin,Deputy Secretary-general of the China Nonferrous Metals Industry Association Lithium Branch,shared the operation
