考虑系统柔度影响的水压致裂法测量深部岩石应力

为了有效测量水压致裂方法中的重张压力,必须使用具有足够小柔度的试验设备,否则无法从重张压力估计垂直钻孔平面的最大水平应力。仅通过替换水压致裂系统中的某一部件来大幅度降低系统柔度是很难的。但如果流量计尽可能安装在靠近跨接式封隔器隔离出的钻孔测试区,那么系统柔度就会大大降低。为此,我们研制出配有井下流量计的试验系统,并在野外试验中成功验证。此外,我们还介绍了能开展几千米深应力测量的一种新方法。

抗MERS-CoV和狂犬病病毒重组复制缺陷型狂犬病病毒二价疫苗的研制及其体液免疫原性

RV∆P是此前构建的一种有前景和安全的病毒载体,本研究利用复制不完全的P基因缺陷型RV(RV∆P)开发了一种新型的抗中东呼吸综合征冠状病毒(MERS-CoV)和狂犬病病毒(rabies virus,RV)的二价疫苗。MERS-CoV棘突糖蛋白由S1和S2亚单位组成,S1亚单位是中和抗体的主要靶点。

ON CORRELATION OF CAVITATION EROSION AND NOISE ON A FOIL SECTION

Tests with two different sized models were conducted in the Marine Propeller Cavitation Tunnel at the Univer- sity of Tokyo.At two angles of attack the developed sheet-cloud and bubble cavitation occurred.Erosion pattern was recorded by pure indium specimens and noise was measured with a hydrophone mounted inside the tunnel.The broadband SPL was mainly used for correlation of noise with pit counting results from erosion.In case of sheet- cloud cavitation power law relations between velocity and SPL have been found and there existed a linear relation- ship between SPL values and IgPR values(PR-pitting rate).However in case of bubble cavitation such power law relation does not exist between pitting rate and velocity,and neither between SPL and velocity.It was noticed that the different trends of SPL for these two different types of cavitation could be qualitatively linked to their pitting rates by using some SPL values at high center frequencies.