CN-85 detector which covered with boric acid H3Bo3 pellete has been irradiated by thermal neutrons from (241Am-9Be) source with activity 12 Ci and neutron flux 105 n. cm-2. s-1. The irradiation times-TD for detector w...CN-85 detector which covered with boric acid H3Bo3 pellete has been irradiated by thermal neutrons from (241Am-9Be) source with activity 12 Ci and neutron flux 105 n. cm-2. s-1. The irradiation times-TD for detector were 4 h, 8 h, 16 h and 24 h. The track detector has been etched with sodium hydroxide. After chemical etching of the irradiated CN-85 detector, the images have been taken from a digital camera connected to the optical microscope. Image processing for the output images has been performed using MATALB program, and these images were analyzed and we had found the following relations: a) The relation between summation of opened track or surface density for tracks (intensity-IT) varies with radius of opening (track radius-RT). b) The relation between the tracks number-NT varies with the tracks diameter-DT (in micrometer) and tracks area-AT. That analysis of image processing was obtained, and the track intensity-IT was decreased with increase of track radius-RT at all of the irradiation time-TD. And the track intensity-IT was increased with increasing irradiation time-TD (h) for different track radius-RT (0.4225, 0.845, 1.2675 and 1.69 μm). The study indicates the possibility of using the analysis of image processing to CN-85 detector for classification of α-particle emitters through limitation of radius of track-RT, in addition to the contribution of these techniques in preparation of nano-filters and nono-membrane in nanotechnology fields.展开更多
Matlab has a high performance at engineering calculation.C# is good at interface development.Combining their advantages together,hybrid programming with Matlab and C # will help to improve the reliability analysis sof...Matlab has a high performance at engineering calculation.C# is good at interface development.Combining their advantages together,hybrid programming with Matlab and C # will help to improve the reliability analysis software efficiency and accuracy significantly.Procedures of hybrid programming with Matlab and C# in reliability analysis software are introduced in this paper.Finally a mathematical problem is tested to verify the feasibility of this programming method.展开更多
抽取滤波器是数字下变频(Digital Down Converter,DDC)系统中的核心组成部分,一直是工程实践中研究的重点。CIC滤波器(Cascade Integrator Comb,CIC)以及半带滤波器是广泛用于实现抽取功能的两种滤波器。通过分析研究CIC滤波器与半带滤...抽取滤波器是数字下变频(Digital Down Converter,DDC)系统中的核心组成部分,一直是工程实践中研究的重点。CIC滤波器(Cascade Integrator Comb,CIC)以及半带滤波器是广泛用于实现抽取功能的两种滤波器。通过分析研究CIC滤波器与半带滤波器的工作原理,基于Python与Matlab联合编程的方式,设计了可交互的自动化平台。该平台可根据输入的CIC滤波器或半带滤波器的特性参数,自动设计多级CIC滤波器以及多级级联的半带滤波器RTL代码,增强了代码的可复用性,提升了设计效率。可自动设计2倍~128倍抽取的CIC滤波器以及2倍~16倍抽取的半带滤波器。该平台还特别添加了生成CIC滤波器与半带滤波器的多种幅频响应曲线的功能,可以更直观地体现所设计的滤波器的各项参数指标。展开更多
文摘CN-85 detector which covered with boric acid H3Bo3 pellete has been irradiated by thermal neutrons from (241Am-9Be) source with activity 12 Ci and neutron flux 105 n. cm-2. s-1. The irradiation times-TD for detector were 4 h, 8 h, 16 h and 24 h. The track detector has been etched with sodium hydroxide. After chemical etching of the irradiated CN-85 detector, the images have been taken from a digital camera connected to the optical microscope. Image processing for the output images has been performed using MATALB program, and these images were analyzed and we had found the following relations: a) The relation between summation of opened track or surface density for tracks (intensity-IT) varies with radius of opening (track radius-RT). b) The relation between the tracks number-NT varies with the tracks diameter-DT (in micrometer) and tracks area-AT. That analysis of image processing was obtained, and the track intensity-IT was decreased with increase of track radius-RT at all of the irradiation time-TD. And the track intensity-IT was increased with increasing irradiation time-TD (h) for different track radius-RT (0.4225, 0.845, 1.2675 and 1.69 μm). The study indicates the possibility of using the analysis of image processing to CN-85 detector for classification of α-particle emitters through limitation of radius of track-RT, in addition to the contribution of these techniques in preparation of nano-filters and nono-membrane in nanotechnology fields.
文摘Matlab has a high performance at engineering calculation.C# is good at interface development.Combining their advantages together,hybrid programming with Matlab and C # will help to improve the reliability analysis software efficiency and accuracy significantly.Procedures of hybrid programming with Matlab and C# in reliability analysis software are introduced in this paper.Finally a mathematical problem is tested to verify the feasibility of this programming method.
文摘抽取滤波器是数字下变频(Digital Down Converter,DDC)系统中的核心组成部分,一直是工程实践中研究的重点。CIC滤波器(Cascade Integrator Comb,CIC)以及半带滤波器是广泛用于实现抽取功能的两种滤波器。通过分析研究CIC滤波器与半带滤波器的工作原理,基于Python与Matlab联合编程的方式,设计了可交互的自动化平台。该平台可根据输入的CIC滤波器或半带滤波器的特性参数,自动设计多级CIC滤波器以及多级级联的半带滤波器RTL代码,增强了代码的可复用性,提升了设计效率。可自动设计2倍~128倍抽取的CIC滤波器以及2倍~16倍抽取的半带滤波器。该平台还特别添加了生成CIC滤波器与半带滤波器的多种幅频响应曲线的功能,可以更直观地体现所设计的滤波器的各项参数指标。
