Shock compression experiments on a new kind of 47Zr45Ti5Al3V alloys at pressures between 28 and 200 GPa are performed using a two-stage light gas gun.The Hugoniot data are obtained by combining the impedance-match met...Shock compression experiments on a new kind of 47Zr45Ti5Al3V alloys at pressures between 28 and 200 GPa are performed using a two-stage light gas gun.The Hugoniot data are obtained by combining the impedance-match method and the electrical probe technique.The relationship between the shock wave velocity Us and particle velocity up can be described linearly by U_(s)=4.324(±0.035)+1.177(±0.012)up.No obvious evidence of phase transition is found in the shock compression pressure range.The calculated U_(s)-up relationship obtained from the additive principle is different from the experimental data,indicating that theα→βphase transition occurs below 28 GPa.The Grüneisen parameterγobtained from the experimental data can be expressed byγ=1.277(ρ0/ρ).The zero-pressure bulk modulus B0s=97.96 GPa and its pressure derivative B_(0s)=3.68.The P–V–T equation of state for 47Zr45Ti5Al3V is given using the Vinet equation of state to describe the cold curve and the Debye model for the thermal contributions.展开更多
Background Carcinoma of unknown primary （CUP） encompasses a heterogeneous group of tumors with varying clinical features. The management of patients of CUP remains a clinical challenge. The purpose of this study was...Background Carcinoma of unknown primary （CUP） encompasses a heterogeneous group of tumors with varying clinical features. The management of patients of CUP remains a clinical challenge. The purpose of this study was to evaluate the clinical applications of integrated 18F-fluorodeoxyglucose positron emission tomography/computed tomography （FDG PET/CT） information in patients with CUP, including detecting the occult primary tumor and effecting on disease therapy.展开更多
基金Supported by the National Basic Research Program of China under Grant No 2010CB731600the Specialized Research Project for the Protection against Space Debris of China under Grant Nos kjsp06209 and kjsp06210.
文摘Shock compression experiments on a new kind of 47Zr45Ti5Al3V alloys at pressures between 28 and 200 GPa are performed using a two-stage light gas gun.The Hugoniot data are obtained by combining the impedance-match method and the electrical probe technique.The relationship between the shock wave velocity Us and particle velocity up can be described linearly by U_(s)=4.324(±0.035)+1.177(±0.012)up.No obvious evidence of phase transition is found in the shock compression pressure range.The calculated U_(s)-up relationship obtained from the additive principle is different from the experimental data,indicating that theα→βphase transition occurs below 28 GPa.The Grüneisen parameterγobtained from the experimental data can be expressed byγ=1.277(ρ0/ρ).The zero-pressure bulk modulus B0s=97.96 GPa and its pressure derivative B_(0s)=3.68.The P–V–T equation of state for 47Zr45Ti5Al3V is given using the Vinet equation of state to describe the cold curve and the Debye model for the thermal contributions.
文摘Background Carcinoma of unknown primary （CUP） encompasses a heterogeneous group of tumors with varying clinical features. The management of patients of CUP remains a clinical challenge. The purpose of this study was to evaluate the clinical applications of integrated 18F-fluorodeoxyglucose positron emission tomography/computed tomography （FDG PET/CT） information in patients with CUP, including detecting the occult primary tumor and effecting on disease therapy.
