With the emergence of the 6G technology,integrated sensing and communication(ISAC)has become a hot-spot vertical application.The low-altitude scenario is considered to be a significant use case of the ISAC.However,the...With the emergence of the 6G technology,integrated sensing and communication(ISAC)has become a hot-spot vertical application.The low-altitude scenario is considered to be a significant use case of the ISAC.However,the existing channel model is hard to meet the demands of the sensing function.The radar-cross-section(RCS)is a critical feature for the sensing part,while accurate RCS data for the typical frequency band of ISAC are still lacking.Therefore,this paper conducts measurements and analysis of the RCS data of the unmanned aerial vehicles(UAVs)under multiple poses and angles in real flying conditions.The echo from a UAV is acquired in an anechoic chamber,and the RCS values are calculated.The results of different flying attitudes are analyzed,providing RCS features for the ISAC applications.展开更多
We investigated the eff ects of temperature（14,20,and 22℃）,salinity（5,10,15,20,and 25）,and body length（0.83,1.17,1.49,and 2.33 mm）on the energy budget of Daphniopsis tibetana Sars in the laboratory.The results ...We investigated the eff ects of temperature（14,20,and 22℃）,salinity（5,10,15,20,and 25）,and body length（0.83,1.17,1.49,and 2.33 mm）on the energy budget of Daphniopsis tibetana Sars in the laboratory.The results demonstrated no diff erence in D.tibetana assimilation efficiency（AE）with values of 51.59%–56.22% at the trial temperatures.Gross growth efficiency（K1）and net growth efficiency（K2）were 28.78% and 55.71%,respectively,at 14℃.Daphniopsis tibetana energy conversion efficiency（AE,K1,and K2）was higher at salinities of 10–20,with values of 72.80%–77.31%,42.50%–50.42%,and 58.43%–65.02%,respectively.Daphniopsis tibetana energy conversion efficiency was highest when body length was 1.17–1.19 mm,with values of 83.70%–84.73%,50.11%–50.81%,and 59.13%–60.71%,respectively.The results of this study can provide a reference for large-scale cultivation use of D.tibetana in the further.展开更多
基金supported by ZTE Industry-University-Institute Cooperation Funds under Grant No.HC-CN-20220622006。
文摘With the emergence of the 6G technology,integrated sensing and communication(ISAC)has become a hot-spot vertical application.The low-altitude scenario is considered to be a significant use case of the ISAC.However,the existing channel model is hard to meet the demands of the sensing function.The radar-cross-section(RCS)is a critical feature for the sensing part,while accurate RCS data for the typical frequency band of ISAC are still lacking.Therefore,this paper conducts measurements and analysis of the RCS data of the unmanned aerial vehicles(UAVs)under multiple poses and angles in real flying conditions.The echo from a UAV is acquired in an anechoic chamber,and the RCS values are calculated.The results of different flying attitudes are analyzed,providing RCS features for the ISAC applications.
基金Supported by the National Natural Science Foundation of China(No.41501535)the Special Program for Key Basic Research of the Ministry of Science and Technology,China(No.2014FY210700)
文摘We investigated the eff ects of temperature（14,20,and 22℃）,salinity（5,10,15,20,and 25）,and body length（0.83,1.17,1.49,and 2.33 mm）on the energy budget of Daphniopsis tibetana Sars in the laboratory.The results demonstrated no diff erence in D.tibetana assimilation efficiency（AE）with values of 51.59%–56.22% at the trial temperatures.Gross growth efficiency（K1）and net growth efficiency（K2）were 28.78% and 55.71%,respectively,at 14℃.Daphniopsis tibetana energy conversion efficiency（AE,K1,and K2）was higher at salinities of 10–20,with values of 72.80%–77.31%,42.50%–50.42%,and 58.43%–65.02%,respectively.Daphniopsis tibetana energy conversion efficiency was highest when body length was 1.17–1.19 mm,with values of 83.70%–84.73%,50.11%–50.81%,and 59.13%–60.71%,respectively.The results of this study can provide a reference for large-scale cultivation use of D.tibetana in the further.
