Pellet injection is a primary method for fueling the plasma in magnetic confinement devices.For that goal the knowledges of pellet ablation and deposition profiles are critical.In the present study,the pellet fueling ...Pellet injection is a primary method for fueling the plasma in magnetic confinement devices.For that goal the knowledges of pellet ablation and deposition profiles are critical.In the present study,the pellet fueling code HPI2 was used to predict the ablation and deposition profiles of deuterium pellets injected into a typical H-mode discharge on the EAST tokamak.Pellet ablation and deposition profiles were evaluated for various pellet injection locations,with the aim at optimizing the pellet injection to obtain a deep fueling depth.In this study,we investigate the effect of the injection angle on the deposition depth of the pellet at different velocities and sizes.The ablation and deposition of the injected pellet are mainly studied at each injection position for three different injection angles:0°,45°,and 60°.The pellet injection on the high field side(HFS)can achieve a more ideal deposition depth than on the low field side(LFS).Among these angles,horizontal injection on the middle plane is relatively better on either the HFS or the LFS.When the injection location is 0.468 m below the middle plane on the HFS or 0.40 m above the middle plane of the LFS,it can achieve a similar deposition depth to the one of its corresponding side.When the pre-cooling effect is taken into account,the deposition depth is predicted to increase only slightly when the pellet is launched from the HFS.The findings of this study will serve as a reference for the update of pellet injection systems for the EAST tokamak.展开更多
为了解临床禽源致病性大肠杆菌中高致病性毒力岛(High pathogenicity island HPI)流行情况和基因特征,根据Gen Bank已知禽源irp2基因序列,设计、合成一对特异性引物,建立irp2基因PCR检测方法,优化、确定PCR扩增特性,进行敏感性、特异性...为了解临床禽源致病性大肠杆菌中高致病性毒力岛(High pathogenicity island HPI)流行情况和基因特征,根据Gen Bank已知禽源irp2基因序列,设计、合成一对特异性引物,建立irp2基因PCR检测方法,优化、确定PCR扩增特性,进行敏感性、特异性、重复性检测评价。对256份临床分离禽源大肠杆菌进行irp2基因PCR检测和基因遗传变异分析。结果显示,建立的PCR检测方法敏感性可达2.14×10^(-4)ng/μL;特异性显示与鸡沙门菌、副鸡嗜血杆菌、鸭疫里默菌、禽巴氏杆菌、鸡毒支原体、鸡新城疫病毒、禽流感病毒(H9N5)核酸均无交叉反应;重复性显示3份阳性样品重复5次检测,变异系数3.4%~5.0%。256份临床样品PCR检测irp2基因,阳性率30.6%。获得了9株分离株irp2基因序列,分析显示,与GenBank已知基因同源性高达96.2%以上。说明建立的禽源大肠杆菌HPI毒力岛irp2基因PCR检测方法具有良好的特异性、敏感性和重复性,可应用于临床致病性大肠杆菌毒力岛基因快速检测。展开更多
在通用数字信号处理中,DSP具有强大的数字信号处理能力,但其控制能力不足,通常采用HPI与主机组成系统解决此问题。本文以TMS320C5416为例,介绍了DSP芯片HPI(host port interface)的组成及功能,并以AVR ATmega128L单片机作为主机,重点研...在通用数字信号处理中,DSP具有强大的数字信号处理能力,但其控制能力不足,通常采用HPI与主机组成系统解决此问题。本文以TMS320C5416为例,介绍了DSP芯片HPI(host port interface)的组成及功能,并以AVR ATmega128L单片机作为主机,重点研究一种灵活通用的HPI与主机之间实现数据互传的硬件连接方案和软件实现方法,实现了主机通过HPI对DSP的程序引导。展开更多
以TMS320C542为例,介绍了其系列DSP(digital signal processing)芯片HPI(host port interface) 口的各个组成部分及其功能,并以AT89C51单片机作为主处理机,阐述了与TMS320C542之间实现数据共享的方法,成功地解决了主处理机通过 HPI接口...以TMS320C542为例,介绍了其系列DSP(digital signal processing)芯片HPI(host port interface) 口的各个组成部分及其功能,并以AT89C51单片机作为主处理机,阐述了与TMS320C542之间实现数据共享的方法,成功地解决了主处理机通过 HPI接口对DSP内部数据进行在线修改和实时监控的问题.最后给出了如何用HPI口实现程序的加载引导,以提高程序运行速度的方法.展开更多
基金supported by the National Natural Science Foundation of China (Grant Nos.12205196 and 12275040)the National Key Research and Development Program of China (Grant No.2022YFE03090003)。
文摘Pellet injection is a primary method for fueling the plasma in magnetic confinement devices.For that goal the knowledges of pellet ablation and deposition profiles are critical.In the present study,the pellet fueling code HPI2 was used to predict the ablation and deposition profiles of deuterium pellets injected into a typical H-mode discharge on the EAST tokamak.Pellet ablation and deposition profiles were evaluated for various pellet injection locations,with the aim at optimizing the pellet injection to obtain a deep fueling depth.In this study,we investigate the effect of the injection angle on the deposition depth of the pellet at different velocities and sizes.The ablation and deposition of the injected pellet are mainly studied at each injection position for three different injection angles:0°,45°,and 60°.The pellet injection on the high field side(HFS)can achieve a more ideal deposition depth than on the low field side(LFS).Among these angles,horizontal injection on the middle plane is relatively better on either the HFS or the LFS.When the injection location is 0.468 m below the middle plane on the HFS or 0.40 m above the middle plane of the LFS,it can achieve a similar deposition depth to the one of its corresponding side.When the pre-cooling effect is taken into account,the deposition depth is predicted to increase only slightly when the pellet is launched from the HFS.The findings of this study will serve as a reference for the update of pellet injection systems for the EAST tokamak.
文摘为了解临床禽源致病性大肠杆菌中高致病性毒力岛(High pathogenicity island HPI)流行情况和基因特征,根据Gen Bank已知禽源irp2基因序列,设计、合成一对特异性引物,建立irp2基因PCR检测方法,优化、确定PCR扩增特性,进行敏感性、特异性、重复性检测评价。对256份临床分离禽源大肠杆菌进行irp2基因PCR检测和基因遗传变异分析。结果显示,建立的PCR检测方法敏感性可达2.14×10^(-4)ng/μL;特异性显示与鸡沙门菌、副鸡嗜血杆菌、鸭疫里默菌、禽巴氏杆菌、鸡毒支原体、鸡新城疫病毒、禽流感病毒(H9N5)核酸均无交叉反应;重复性显示3份阳性样品重复5次检测,变异系数3.4%~5.0%。256份临床样品PCR检测irp2基因,阳性率30.6%。获得了9株分离株irp2基因序列,分析显示,与GenBank已知基因同源性高达96.2%以上。说明建立的禽源大肠杆菌HPI毒力岛irp2基因PCR检测方法具有良好的特异性、敏感性和重复性,可应用于临床致病性大肠杆菌毒力岛基因快速检测。
文摘在通用数字信号处理中,DSP具有强大的数字信号处理能力,但其控制能力不足,通常采用HPI与主机组成系统解决此问题。本文以TMS320C5416为例,介绍了DSP芯片HPI(host port interface)的组成及功能,并以AVR ATmega128L单片机作为主机,重点研究一种灵活通用的HPI与主机之间实现数据互传的硬件连接方案和软件实现方法,实现了主机通过HPI对DSP的程序引导。
文摘以TMS320C542为例,介绍了其系列DSP(digital signal processing)芯片HPI(host port interface) 口的各个组成部分及其功能,并以AT89C51单片机作为主处理机,阐述了与TMS320C542之间实现数据共享的方法,成功地解决了主处理机通过 HPI接口对DSP内部数据进行在线修改和实时监控的问题.最后给出了如何用HPI口实现程序的加载引导,以提高程序运行速度的方法.
