The influence of the sidelong heat transfer on the PTR signal is discussed. The typical effect is to reduce the phase delay of the PTR signal when thermal waves extend to the sideface, A three-dimensional model, of wh...The influence of the sidelong heat transfer on the PTR signal is discussed. The typical effect is to reduce the phase delay of the PTR signal when thermal waves extend to the sideface, A three-dimensional model, of which the results are in good agreement with the experimental date, is put forward. Comparisons with the results from the one-dimensional model are given.展开更多
SPIE-Vol.3818 01201131999年 SPIE 会议录,卷3818:紫外大气及空间遥感:方法与仪器=1999 proceedings of SPIE,Vol.3818:Ultraviolet atmospheric and space remote sensing:meth-ods and instrumentation[会,英]/SPIE-The Internationa...SPIE-Vol.3818 01201131999年 SPIE 会议录,卷3818:紫外大气及空间遥感:方法与仪器=1999 proceedings of SPIE,Vol.3818:Ultraviolet atmospheric and space remote sensing:meth-ods and instrumentation[会,英]/SPIE-The InternationalSociety for Optical Engineering.—1999.—200P.(EC)本会议录收集了于1999年7月22日在科罗拉多州 Denver 召开的紫外大气与空间遥感会议上发表的20篇论文,内容涉及波长与辐射测量学标准,紫外光谱辐射测量用可移动高精度双光谱仪。展开更多
Y2001-62695 01111971999年 IEEE 辐射及其对元件与系统的影响会议录=1999 IEEE European Conference on radiation and its ef-fects on components and systems[会,英]/IEEE Nuclearand Piasma Sciences Society.—IEEE,1999.—597P.(...Y2001-62695 01111971999年 IEEE 辐射及其对元件与系统的影响会议录=1999 IEEE European Conference on radiation and its ef-fects on components and systems[会,英]/IEEE Nuclearand Piasma Sciences Society.—IEEE,1999.—597P.(EC)本会议录收集了于1999年9月13～17日在法国Fontevraud 召开的辐射对系统的影响会议上发表的103篇论文,内容涉及空间环境中的辐射,材料间的辐射相互作用,辐射测量学,辐照测试仪器,辐射对晶体管和电路的影响,集成电路硬化处理,辐射条件下光学元件的特性。0111198双参数指数分布步加试验定数截尾加速系数的 BLUE[刊]/刘海峰//解放军理工大学学报(自然科学版).—2001,2(1).—100～102(K)在寿命分布为双参数指数分布的前提下,对失效率加速模型(2)和保证寿命加速模型(3)讨论了利用双应力交叉步加试验数据对参数进行最佳线性无偏估计(BLUE)的方法。然后由模型求得正常工作应力下各种可靠性指标。展开更多
In this paper,single-point field measurements of noise radiated from high-speed trains were performed at two sites along Beijing-Tianjin intercity railway(BTIR),aiming at acquiring the realistic acoustic data for vali...In this paper,single-point field measurements of noise radiated from high-speed trains were performed at two sites along Beijing-Tianjin intercity railway(BTIR),aiming at acquiring the realistic acoustic data for validation and verification of physical model and computational prediction.The measurements showed that A-weighted sound pressure levels(SPLs) were between 80 and 87 dBA as trains passed.The maximum noise occurred at the moment when the pantograph arrived,suggesting that pantograph noise was one of the most significant sources.Sound radiated from high-speed trains of BTIR was a typical broadband spectrum with most acoustic power restricted in the range of medium-high frequency from about 400 Hz to 5 kHz.Aerodynamic noise was shown to be the dominant one over other acoustic sources for high-speed trains.展开更多
文摘The influence of the sidelong heat transfer on the PTR signal is discussed. The typical effect is to reduce the phase delay of the PTR signal when thermal waves extend to the sideface, A three-dimensional model, of which the results are in good agreement with the experimental date, is put forward. Comparisons with the results from the one-dimensional model are given.
文摘SPIE-Vol.3818 01201131999年 SPIE 会议录,卷3818:紫外大气及空间遥感:方法与仪器=1999 proceedings of SPIE,Vol.3818:Ultraviolet atmospheric and space remote sensing:meth-ods and instrumentation[会,英]/SPIE-The InternationalSociety for Optical Engineering.—1999.—200P.(EC)本会议录收集了于1999年7月22日在科罗拉多州 Denver 召开的紫外大气与空间遥感会议上发表的20篇论文,内容涉及波长与辐射测量学标准,紫外光谱辐射测量用可移动高精度双光谱仪。
文摘Y2001-62695 01111971999年 IEEE 辐射及其对元件与系统的影响会议录=1999 IEEE European Conference on radiation and its ef-fects on components and systems[会,英]/IEEE Nuclearand Piasma Sciences Society.—IEEE,1999.—597P.(EC)本会议录收集了于1999年9月13～17日在法国Fontevraud 召开的辐射对系统的影响会议上发表的103篇论文,内容涉及空间环境中的辐射,材料间的辐射相互作用,辐射测量学,辐照测试仪器,辐射对晶体管和电路的影响,集成电路硬化处理,辐射条件下光学元件的特性。0111198双参数指数分布步加试验定数截尾加速系数的 BLUE[刊]/刘海峰//解放军理工大学学报(自然科学版).—2001,2(1).—100～102(K)在寿命分布为双参数指数分布的前提下,对失效率加速模型(2)和保证寿命加速模型(3)讨论了利用双应力交叉步加试验数据对参数进行最佳线性无偏估计(BLUE)的方法。然后由模型求得正常工作应力下各种可靠性指标。
基金supported by the National Key Technology R&D Program (Grant No.2009BAG12A03)Knowledge Innovation Project of Chinese Academy of Sciences of China(Grant No.KJCX2-EW-L02-1)
文摘In this paper,single-point field measurements of noise radiated from high-speed trains were performed at two sites along Beijing-Tianjin intercity railway(BTIR),aiming at acquiring the realistic acoustic data for validation and verification of physical model and computational prediction.The measurements showed that A-weighted sound pressure levels(SPLs) were between 80 and 87 dBA as trains passed.The maximum noise occurred at the moment when the pantograph arrived,suggesting that pantograph noise was one of the most significant sources.Sound radiated from high-speed trains of BTIR was a typical broadband spectrum with most acoustic power restricted in the range of medium-high frequency from about 400 Hz to 5 kHz.Aerodynamic noise was shown to be the dominant one over other acoustic sources for high-speed trains.
