Laser anti-drone technology is entering the sequence of actual combat,and it is necessary to consider the vulnerability of typical functional parts of UAVs.Since the concept of"vulnerability"was proposed,a v...Laser anti-drone technology is entering the sequence of actual combat,and it is necessary to consider the vulnerability of typical functional parts of UAVs.Since the concept of"vulnerability"was proposed,a variety of analysis programs for battlefield targets to traditional weapons have been developed,but a comprehensive assessment methodology for targets'vulnerability to laser is still missing.Based on the shotline method,this paper proposes a method that equates laser beam to shotline array,an efficient vulnerability analysis program of target to laser is established by this method,and the program includes the circuit board and the wire into the vulnerability analysis category,which improves the precision of the vulnerability analysis.Taking the UAV engine part as the target of vulnerability analysis,combine with the"life-death unit method"to calculate the laser penetration rate of various materials of the UAV,and the influence of laser weapon system parameters and striking orientation on the killing probability is quantified after introducing the penetration rate into the vulnerability analysis program.The quantitative analysis method proposed in this paper has certain general expansibility,which can provide a fresh idea for the vulnerability analysis of other targets to laser.展开更多
We present a Raman scattering study of ZnSe over a temperature range from 80 to 580 K. Both of TO and LO modes of ZnSe nanowires are observed a red-shift with elevating temperature, and its intrinsic broadening is lar...We present a Raman scattering study of ZnSe over a temperature range from 80 to 580 K. Both of TO and LO modes of ZnSe nanowires are observed a red-shift with elevating temperature, and its intrinsic broadening is larger than that of bulk counterpart. The opticalphonon lifetime of ZnSe nanowires are longer than that of nanoparticles but shorter than that of bulk, which can be attributed to the different surface to volume ratios. Some overtones and multi-phonon peaks are also observed at high temperature due to the larger wave vector q. The 2TA<sub>1</sub>(K) and multi-phonon peaks TA(X,K) + LA(X) appears at the temperature that is higher than room temperature. The intensity of overtones acoustics TA(L) elevates with increasing temperature while the surface mode disappears at temperature higher than 296 K. Detailed investigations on temperature-dependent phonon characteristics provide essential component for understanding confined phonons effects at small scale.展开更多
基金National Natural Science Foundation of China(Grant Nos.62005276,62175234)the Scientific and Technological Development Program of Jilin,China(Grant No.20230508111RC)to provide fund for this research。
文摘Laser anti-drone technology is entering the sequence of actual combat,and it is necessary to consider the vulnerability of typical functional parts of UAVs.Since the concept of"vulnerability"was proposed,a variety of analysis programs for battlefield targets to traditional weapons have been developed,but a comprehensive assessment methodology for targets'vulnerability to laser is still missing.Based on the shotline method,this paper proposes a method that equates laser beam to shotline array,an efficient vulnerability analysis program of target to laser is established by this method,and the program includes the circuit board and the wire into the vulnerability analysis category,which improves the precision of the vulnerability analysis.Taking the UAV engine part as the target of vulnerability analysis,combine with the"life-death unit method"to calculate the laser penetration rate of various materials of the UAV,and the influence of laser weapon system parameters and striking orientation on the killing probability is quantified after introducing the penetration rate into the vulnerability analysis program.The quantitative analysis method proposed in this paper has certain general expansibility,which can provide a fresh idea for the vulnerability analysis of other targets to laser.
文摘We present a Raman scattering study of ZnSe over a temperature range from 80 to 580 K. Both of TO and LO modes of ZnSe nanowires are observed a red-shift with elevating temperature, and its intrinsic broadening is larger than that of bulk counterpart. The opticalphonon lifetime of ZnSe nanowires are longer than that of nanoparticles but shorter than that of bulk, which can be attributed to the different surface to volume ratios. Some overtones and multi-phonon peaks are also observed at high temperature due to the larger wave vector q. The 2TA<sub>1</sub>(K) and multi-phonon peaks TA(X,K) + LA(X) appears at the temperature that is higher than room temperature. The intensity of overtones acoustics TA(L) elevates with increasing temperature while the surface mode disappears at temperature higher than 296 K. Detailed investigations on temperature-dependent phonon characteristics provide essential component for understanding confined phonons effects at small scale.
