For a better understanding of Li Ziqi,this paper tries to find causes of her success based on Harold Lasswell's 5W Model of Communication.At last,according to our study,Li's success can be concluded as follows...For a better understanding of Li Ziqi,this paper tries to find causes of her success based on Harold Lasswell's 5W Model of Communication.At last,according to our study,Li's success can be concluded as follows:firstly,Li has made full use of the advantage of the folk cultural exchanges;secondly,Li's videos are quite rich in the cultural content,covering a large number of cultural symbols which can cause a wide sympathy among people worldwide;thirdly,Li has taken good advantage of the new media technology in the we-media era;and fourthly,Li is careful and hardworking enough to produce her videos and have a high requirement for the video quality.In addition,this paper gives some advice on how to promote Chinese culture going global:firstly,give a great support to the folk cultural exchanges and allow them to play a leading role in spreading Chinese culture globally;secondly,explore more Chinese cultural symbols and enrich the Chinese culture content to speak for China;thirdly,take full advantage of the new media technology;fourthly,seek more common grounds while overcoming the existing cultural differences;and fifthly,reform our existing Chinese education system to improve the quality of folk cultural exchanges.Through the analysis above,this paper aims to provide some views on Li’s success overseas and give some advice on promoting Chinese culture globally.展开更多
With the exponential growth of the data traffic in wireless communication systems, terahertz(THz) frequency band is envisioned as a promising candidate to support ultra-broadband for future beyond fifth generation(5G)...With the exponential growth of the data traffic in wireless communication systems, terahertz(THz) frequency band is envisioned as a promising candidate to support ultra-broadband for future beyond fifth generation(5G), bridging the gap between millimeter wave(mmWave) and optical frequency ranges. The purpose of this paper is to provide a comprehensive literature review on the development towards THz communications and presents some key technologies faced in THz wireless communication systems. Firstly, despite the substantial hardware problems that have to be developed in terms of the THz solid state superheterodyne receiver, high speed THz modulators and THz antennas, the practical THz channel model and the efficient THz beamforming are also described to compensate for the severe path attenuation. Moreover, two different kinds of lab-level THz communication systems are introduced minutely, named a solid state THz communication system and a spatial direct modulation THz communication system, respectively. The solid state THz system converts intermediate frequency(IF) modulated signal to THz frequency while the direct modulation THz system allows the high power THz sources to input for approving the relatively long distance communications. Finally, we discuss several potential application scenarios as well as some vital technical challenges that will be encountered in the future THz communications.展开更多
Millimeter-wave(mm Wave) communications will be used in fifth-generation(5G) mobile communication systems, but they experience severe path loss and have high sensitivity to physical objects, leading to smaller cell ra...Millimeter-wave(mm Wave) communications will be used in fifth-generation(5G) mobile communication systems, but they experience severe path loss and have high sensitivity to physical objects, leading to smaller cell radii and complicated network architectures. A coverage extension scheme using large-scale antenna arrays(LSAAs) has been suggested and theoretically proven to be cost-efficient in combination with ultradense small cell networks. To analyze and optimize the LSAA-based network deployments, a comprehensive survey of recent advances in statistical mmWave channel modeling is first presented in terms of channel parameter estimation, large-scale path loss models, and small-scale cluster models. Next, the measurement and modeling results at two 5G candidate mmWave bands(e.g., 28 GHz and 39 GHz) are reviewed and compared in several outdoor scenarios of interest, where the propagation characteristics make crucial contributions to wireless network designs. Finally, the coverage behaviors of systems employing a large number of antenna arrays are discussed, as well as some implications on future mmWave cellular network designs.展开更多
The paper aims at proffering a solution for college English who experience a dilemma that they cannot tap their potential fully to improve the effectiveness and efficiency of writing in English. The author recommends ...The paper aims at proffering a solution for college English who experience a dilemma that they cannot tap their potential fully to improve the effectiveness and efficiency of writing in English. The author recommends model thinking which entails habitual application of models and thus formulating a kind of efficient thinking in composing and arranging the existent linguistic and disciplinary resources established in the students' mind as an approach for those students to further their English writing skills.展开更多
In this paper,we discuss the mathematical relation determined by the basic physical constant between three types of quarks and the masses of leptons with charges in detail.First,by further theoretical analysis,we wond...In this paper,we discuss the mathematical relation determined by the basic physical constant between three types of quarks and the masses of leptons with charges in detail.First,by further theoretical analysis,we wonderfully see that the result got from the mass empirical formula of quark and charged lepton is identical with the data received by theoretical estimating from the gauge field theory.Second,we also gladly see that the result got from quark and lepton(with charges)mass empirical formula is completely accordant with experiment data.These mass formulas reveal the essential relation between me,mμ,mτ and mq.At the same time,the empirical formula may also derive the mass formula of neu-trinos.As to the mass of neutrinos,at present we only know the square difference of its mass,and so this is meaningful to theoretically estimating the mass.展开更多
文摘For a better understanding of Li Ziqi,this paper tries to find causes of her success based on Harold Lasswell's 5W Model of Communication.At last,according to our study,Li's success can be concluded as follows:firstly,Li has made full use of the advantage of the folk cultural exchanges;secondly,Li's videos are quite rich in the cultural content,covering a large number of cultural symbols which can cause a wide sympathy among people worldwide;thirdly,Li has taken good advantage of the new media technology in the we-media era;and fourthly,Li is careful and hardworking enough to produce her videos and have a high requirement for the video quality.In addition,this paper gives some advice on how to promote Chinese culture going global:firstly,give a great support to the folk cultural exchanges and allow them to play a leading role in spreading Chinese culture globally;secondly,explore more Chinese cultural symbols and enrich the Chinese culture content to speak for China;thirdly,take full advantage of the new media technology;fourthly,seek more common grounds while overcoming the existing cultural differences;and fifthly,reform our existing Chinese education system to improve the quality of folk cultural exchanges.Through the analysis above,this paper aims to provide some views on Li’s success overseas and give some advice on promoting Chinese culture globally.
基金supported by the National High Technology Research and Development Program of China (863 program) of China under Grant No.2011AA010200 supported by the National Natural Science Foundation of China (NSFC) under Grant No.61771116 and No.91738102
文摘With the exponential growth of the data traffic in wireless communication systems, terahertz(THz) frequency band is envisioned as a promising candidate to support ultra-broadband for future beyond fifth generation(5G), bridging the gap between millimeter wave(mmWave) and optical frequency ranges. The purpose of this paper is to provide a comprehensive literature review on the development towards THz communications and presents some key technologies faced in THz wireless communication systems. Firstly, despite the substantial hardware problems that have to be developed in terms of the THz solid state superheterodyne receiver, high speed THz modulators and THz antennas, the practical THz channel model and the efficient THz beamforming are also described to compensate for the severe path attenuation. Moreover, two different kinds of lab-level THz communication systems are introduced minutely, named a solid state THz communication system and a spatial direct modulation THz communication system, respectively. The solid state THz system converts intermediate frequency(IF) modulated signal to THz frequency while the direct modulation THz system allows the high power THz sources to input for approving the relatively long distance communications. Finally, we discuss several potential application scenarios as well as some vital technical challenges that will be encountered in the future THz communications.
基金supported in part by the National Natural Science Foundation of China under Grant No.61671145the Key R&D Program of Jiangsu Province of China under Grant BE2018121
文摘Millimeter-wave(mm Wave) communications will be used in fifth-generation(5G) mobile communication systems, but they experience severe path loss and have high sensitivity to physical objects, leading to smaller cell radii and complicated network architectures. A coverage extension scheme using large-scale antenna arrays(LSAAs) has been suggested and theoretically proven to be cost-efficient in combination with ultradense small cell networks. To analyze and optimize the LSAA-based network deployments, a comprehensive survey of recent advances in statistical mmWave channel modeling is first presented in terms of channel parameter estimation, large-scale path loss models, and small-scale cluster models. Next, the measurement and modeling results at two 5G candidate mmWave bands(e.g., 28 GHz and 39 GHz) are reviewed and compared in several outdoor scenarios of interest, where the propagation characteristics make crucial contributions to wireless network designs. Finally, the coverage behaviors of systems employing a large number of antenna arrays are discussed, as well as some implications on future mmWave cellular network designs.
文摘The paper aims at proffering a solution for college English who experience a dilemma that they cannot tap their potential fully to improve the effectiveness and efficiency of writing in English. The author recommends model thinking which entails habitual application of models and thus formulating a kind of efficient thinking in composing and arranging the existent linguistic and disciplinary resources established in the students' mind as an approach for those students to further their English writing skills.
基金the State Key Basic Research Project(973Project)of China(Grant No.2006CB605102)the National Natural Science Foundation of China(Grant No.90306016)
文摘In this paper,we discuss the mathematical relation determined by the basic physical constant between three types of quarks and the masses of leptons with charges in detail.First,by further theoretical analysis,we wonderfully see that the result got from the mass empirical formula of quark and charged lepton is identical with the data received by theoretical estimating from the gauge field theory.Second,we also gladly see that the result got from quark and lepton(with charges)mass empirical formula is completely accordant with experiment data.These mass formulas reveal the essential relation between me,mμ,mτ and mq.At the same time,the empirical formula may also derive the mass formula of neu-trinos.As to the mass of neutrinos,at present we only know the square difference of its mass,and so this is meaningful to theoretically estimating the mass.
