Sections 1 and 2 explain what we believe to be some useful results mentioned in the title. Their core consists of: (1) based on the Mie scattering theory, a model is established and the polarization degree of light scattered from micro-bubbles are calculated and compared for different parameter wavelengths and scattering angles; the characteristics of light scattered from microbubbles can be used to recognize ship wake; (2) the results indicate that the effect on the depolarization by microbubble forward scattering is much more than that of its backscattering; (3) the polarization properties of light scattered from microbubbles are selective in parameter wavelength; the results appear to be useful for the detection of ship wake.

The front-end read-out circuit for Positron Emission Tomography(PET) imaging system is a kind of digital-analog mixed-signal VLSI.Based on the features of multi-channel and high performances of these kinds of chip,the JTAG controller is adopted to realize the initial control and auxiliary test of the chip.An extendable JTAG controller IP core is designed using TSMC 0.18 μm CMOS process,which supports 14 groups of extendable control signal and also supports the reading and writing operations of 16 multi-bits registers scan chains,and joins with the customized substrate driving software.The designed JTAG controller IP core can be also used for the controlling and testing of other mixed-signal VLSI,and has good universality and engineering usage.

The influence of noise and cell mismatch to the jitter performance of DLL is analyzed,and precise Verilog-A models for each module of DLL is achieved.Simulation results show that the worst jitter performance of the Voltage-Controlled Delay Line,which is about 50ps,appears in the middle tap due to cell mismatch;whereas the noise effect to Voltage-Controlled Delay Line cumulates at the last tap,and its peak-to-peak jitter value reaches to 85ps.Compared with transistor-level simulation,the use of Verilog-A modeling can save a lot of time and improve design efficiency greatly.