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- 저자 : Yiyang Ni (검색결과 2 건)
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Yuyang Wang,Shi Jin,Yiyang Ni,Kai-Kit Wong 한국통신학회 2016 Journal of communications and networks Vol.18 No.3
In this paper, we investigate an interference mitigationscheme by antenna selection in device-to-device (D2D) communicationunderlaying downlink cellular networks. We first present theclosed-form expression of the system achievable rate and its asymptoticbehaviors at high signal-to-noise ratio (SNR) and the largeantenna number scenarios. It is shown that the high SNR approximationincreases with more antennas and higher ratio between thetransmit SNR at the base station (BS) and the D2D transmitter. Inaddition, a tight approximation is derived for the rate and we revealtwo thresholds for both the distance of the D2D link and thetransmit SNR at the BS above which the underlaid D2D communicationwill degrade the system rate. We then particularize on thesmall cell setting where all users are closely located. In the smallcell scenario, we show that the relationship between the distance ofthe D2D transmitting link and that of the D2D interfering link tothe cellular user determines whether the D2D communication canenhance the systemachievable rate. Numerical results are providedto verify these results.
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Yi Yang,Hong Wang,Ming Zhang,Mengxue Shi,Cailing Yang,Qiang Ni,Qi Wang,Jing Li,Xuemei Wang,Chen Zhang,Zhi Li 고려인삼학회 2022 Journal of Ginseng Research Vol.46 No.4
Background: In physical activity or labor, the human body is in a state of high intensity stress, and allparts or physiological functions of the body respond positively to maintain or balance the need formovement. The human body has many physiological changes in the process of movement, and fatigue isthe external manifestation of various complex changes inside the human body. Fatigue is also a physiologicalmechanism of self-protection after the body reaches a certain level of activity, which can preventthe occurrence of life-threatening excessive functional failure. The generation of fatigue is a very complexprocess, and its mechanism has not been concluded yet. Therefore, it is an important work to search andscreen the effective components of natural plants that have anti-fatigue effect and to explore theirmechanism. Methods: This was a 8-week, randomized, double-blind, placebo-controlled clinical trial. A total of 110subjects who passed physical examination were included according to the scheme design, and randomlydivided into a test group which was given KRG and a placebo control group. The calculation is carried outaccording to the standard of sub-high-intensity exercise test. Results: There was no adverse effect on safety index of subjects after taking red ginseng capsule. AfterKRG treatment, subjective strength grade is significant lower than placebo treatment. Blood lactic acidcontent is significantly get lower after trial in KRG group, and significant lower than placebo group. Creatine phosphokinase(CK) content is significantly get lower after trial in KRG group, and significantlower than placebo group. Conclusion: According to the criterion in the test scheme, the result shows that KRG is helpful onrelieving physical fatigue.
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