Tornado

摘要： Some volcanic events including flood basalt eruptions and hotspots on earth may strongly be related to (chaotic) Asteroid impacts and (more periodic) near solar system Supernovae explosions. Impacts may define some of the eruption sites and Supernovae, their intensity. The accompanied heat event can lead to a sedimentary basin on top, where a metamorphic process in the lower crust provides a depression at the surface of the earth due to rock volume reduction by water release. The definitely alternating heat event may generally be fixed to the original geographically defined impact site and can certainly last hundreds of Million years. Plate tectonics distribute the relicts of the (tornado like spiraling upwards?) volcanism across the globe. The Hawaiian volcanic hotspot and its possible origin in Northern Australia beginning with the eruptions of Cambrian Antrim flood basalts and a speculative initiating earlier Asteroid impact may act as a further example. Similar to the footprints of astronomical events on climate and life on earth geological processes like volcanism, metamorphism within the earth’s crust and subsequent sedimentary basin development may also be marks of some cosmic influence.

摘要： An outbreak of powerful tornadoes tore through multiple states in the central and southern United States from 10 to 11 December 2021.It is claimed the deadliest tornado outbreak that has taken place on December days.The National Oceanic and Atmospheric Administration had confirmed 66 tornadoes as of 21 December,producing at least 90 fatalities.Most tornadoes occurred at night and thus they were difficult to be visually located,which directly increases the risk for local residents.Two violent nighttime tornadoes were rated category 4 on the enhanced Fujita scale(EF4).Although a high death toll was caused during this event,the operational service actually presented an excellent performance.This tornado outbreak has aroused extensive discussion from both the public and the research community in China.This paper presents a brief discussion on the formation environment and warning services of the tornado outbreak.Recall the deadliest violent tornado in the past 45 years in China,the radar-based tornadic vortex signatures at the locations with EF4 damages show a comparable strength with those in the current cases.Some views on the tornado warning issuance and receiving and damage surveys in China are also presented.

摘要： 本文实现了一个基于Python语言,Airtest工具的聚焦网络爬虫,利用关键字匹配技术对目标网站进行扫描,得到所需数据并抓取。通过自动化的测试能够生成详细的测试报告。用户账号收集用的是Windows系统服务器以及华为云手机,不易被网站检测到是爬虫。而用Linux环境搭建主要是用于智能中签,并且对系统进行了功能模块测试和性能测试。所以对于Python爬虫来说是非常实用和可靠的。

摘要： 在基于物联网技术的大型电机远程监测系统中,大量实时测试数据的转发、存储和计算给云服务器的性能带来了很大挑战.针对这一问题,文章创新性地设计了一系列大型电机远程监测系统云服务器数据接口.通过Python中的PyMySQL扩展库编写数据库通信接口,通过Tornado扩展库基于协程方式编写数据接收接口,基于WebSocket协议编写数据发送接口,优化了电机远程监测系统云服务器对于数据的收、发功能.相比于传统方式,在相同条件下能够大幅降低云服务器系统的内存占用率和CUP占用率,减轻云服务器系统的负担.

摘要： The strong destructive winds during tornadoes can greatly threaten human life and destroy property.The increasing availability of visual and remote observations,especially by Doppler weather radars,is of great value in understanding tornado formation and issuing warnings to the public.In this study,we present the first documented tornado over water detected by a state-of-the-art dual-polarization phased-array radar(dual-PAR)in China.In contrast to new-generation weather radars,the dual-PAR shows great advantages in tornado detection for its high spatial resolution,reliable polarimetric variables,and rapid-scan strategy.The polarimetric signature of copolar cross-correlation coefficient with anomalously low magnitude appears to be effective for verifying a tornado and thus is helpful for issuing tornado warnings.The Guangdong Meteorological Service has been developing an experimental X-band dual-PAR network in the Pearl River Delta with the goal of deploying at least 40 advanced dual-PARs and other dual-polarization weather radars before 2035.This network is the first quasi-operational X-band dual-PAR network with unprecedented high coverage in the globe.With such high-performance close-range PARs,efficient operational nowcasting and warning services for small-scale,rapidly evolving,and damaging weather(e.g.,tornadoes,localized heavy rainfall,microbursts,and hail)can be expected.

摘要： 本文设计了一个基于VxWorks操作系统的串口调试系统,能够实现与具有串口的电子设备进行数据调试的功能,明显地提高了嵌入式开发调试的工作效率。

摘要： 2019年3月14日,英国皇家空军最后一架"狂风"(Tornado)GR4战斗轰炸机结束了最后一次飞行,英军的"狂风"随之正式退役。英国媒体将此事件评价为"一个时代的结束"。确实,40年来,"狂风"一直是英国空中力量的重要组成部分,而在浅灰色的英国"狂风"就此风停之际,砂黄色的沙特"狂风"仍处在"风再起时"。

摘要： 针对目前智能课堂的研究,关于课程的管理系统就提出来了.因此,开发了一种基于Tornado和React技术的课程管理系统.通过Tornado框架作为后端框架,实现数据库中数据的增、删、改、查操作,Tornado与现在主流的Web服务器框架相比有着明显的优势:它是非阻塞式服务器,而且速度相当快,这对于当下的Web开发来说至关重要.前端部分采用React技术将前台表单中输入的数据传输到后端数据库中,并且对数据库中的数据进行相应的操作,React的一切都是组件化的,使得代码更加的模块化,重用代码将变得更加容易,可维护性极高.该系统的开发过程还彻底的实现了前后端分离,前后端的联系仅靠API联系起来,前端部分的开发引用了Mock-api这一虚拟的服务端接口完成前端部分开发.这一开发技术路线充分展现了Tornado和React对Web开发的优势所在,也可以提高这一系统的可维护性.

摘要： 主要介绍了嵌入式实时操作系统及在数字电视广播码流监测方面的开发应用.以研究开发用于监控数字电视网络信号的码流监测仪为例,阐述了怎样开发具有网络功能的嵌入式设备.

摘要： 主要介绍了嵌入式实时操作系统及在数字电视广播码流监测方面的开发应用.以研究开发用于监控数字电视网络信号的码流监测仪为例,阐述了怎样开发具有网络功能的嵌入式设备.

摘要： 主要介绍了嵌入式实时操作系统及在数字电视广播码流监测方面的开发应用.以研究开发用于监控数字电视网络信号的码流监测仪为例,阐述了怎样开发具有网络功能的嵌入式设备.

摘要： 主要介绍了嵌入式实时操作系统及在数字电视广播码流监测方面的开发应用.以研究开发用于监控数字电视网络信号的码流监测仪为例,阐述了怎样开发具有网络功能的嵌入式设备.

摘要： 主要介绍了嵌入式实时操作系统及在数字电视广播码流监测方面的开发应用.以研究开发用于监控数字电视网络信号的码流监测仪为例,阐述了怎样开发具有网络功能的嵌入式设备.

摘要： 主要介绍了嵌入式实时操作系统及在数字电视广播码流监测方面的开发应用.以研究开发用于监控数字电视网络信号的码流监测仪为例,阐述了怎样开发具有网络功能的嵌入式设备.

摘要： 主要介绍了嵌入式实时操作系统及在数字电视广播码流监测方面的开发应用.以研究开发用于监控数字电视网络信号的码流监测仪为例,阐述了怎样开发具有网络功能的嵌入式设备.

摘要： 基于CG迭代的腹部TORNADO图像质量提高方法,包括以下步骤：在序列中采用径向定向条带绕中心旋转采集法，获得原始K空间数据；对原始K空间数据进行插值处理，获得插值后K空间数据，对插值后K空间数据进行校正，获得校正后K空间数据；对原始K空间数据进行维诺图密度补偿和轨迹采集，运用非均匀快速傅里叶变换NUFFT获得原始图像；采用步骤S2获得的校正后K空间数据对原始图像进行CG迭代，并利用GPU提高CG迭代速度，获得高质量腹部TORNADO图像。本发明通过CG迭代的优势提高图像质量，提高了图像的信噪比和分辨率，应用GPU提高CG算法的运行速度，达到临床所需要求，使得腹部TORNADO图像获取速度更快，质量更高。

摘要： 一种基于tornado框架的项目组织方法及系统，先将项目的文件结构分为三级目录，根目录用于存放根目录配置文件以及总路由文件，每个中间级目录分别用于存储一个业务，各中间级目录下分别存放作为底层目录，各底层目录分别包含tornado框架中contorller文件夹以及路由文件，contorller文件夹用于存储与tornado框架中对应业务相关的代码；再在总路由文件中写入函数，函数用于读取各个中间级目录的路径，并根据各个中间级目录的路径，分别读取各个中间级目录下的所述路由文件，将各所述路由文件的头部过滤，保留url的list部分，并各保留url的list部分进行合并，合并后的结果存入总路由文件中作为总的路由。本发明逻辑简单，通用性强，维护成本低。