摘要：【中文】基于信号稀疏表示的NPC三电平逆变器故障诊断方法，(1)对NPC三电平逆变器的拓扑结构和开路故障类型进行分析，同时在MATLAB/SIMULINK环境搭建NPC三电平逆变器故障仿真模型，模拟开路故障类形，采样三相相电压信号Y作为分析的特征信号；(2)对三相相电压信号Y进行分析，通过信号稀疏表示的方法，得到过完备字典D和稀疏系数X，将稀疏系数X作为信号的特征信息；(3)建立多分类支持向量机模型，用训练样本对支持向量机进行训练，将已训练的支持向量机保存；用测试样本测试训练好的支持向量机模型，分析故障诊断结果。其将信号稀疏表示和支持向量机结合取得了良好的诊断效果，具有诊断正确率高等优点。 【EN】The method comprises the steps of (1) analyzing a topological structure and an open-circuit fault type of the NPC three-level inverter, simultaneously building a fault simulation model of the NPC three-level inverter in an MATLAB/SIMULINK environment, simulating the open-circuit fault type, and sampling a three-phase voltage signal Y as an analyzed characteristic signal; (2) analyzing a three-phase voltage signal Y, obtaining an over-complete dictionary D and a sparse coefficient X by a signal sparse representation method, and taking the sparse coefficient X as characteristic information of the signal; (3) establishing a multi-classification support vector machine model, training the support vector machine by using a training sample, and storing the trained support vector machine; and testing the trained support vector machine model by using the test sample, and analyzing the fault diagnosis result. The method combines signal sparse representation and a support vector machine to obtain a good diagnosis effect, and has the advantages of high diagnosis accuracy and the like.

摘要：【中文】本发明涉及教学系统技术领域，尤其是一种借助虚拟现实及软件研发技术的辅助教学系统，包括网络数据库模块以及注册模块，同时注册模块信号连接有题库管理模块，且题库管理模块与网络数据库模块相连接，所述课件下载及发布模块信号连接有交流反馈模块，所述网络数据库模块还连接有安全维护模块，通过中央控制器模块分别设置有试卷修改模块、试卷解析模块以及成绩管理模块，试卷修改模块借助于中央控制器模块中的计算函数进行修改，试卷解析模块以及成绩管理模块通过中央控制模块中的数据统计完成。本发明克服了运行不稳定的缺陷，同时，学生客户端根据自己的时间定制学习计划，对学习的内容实现快速纠正的效果。 【EN】The invention relates to the technical field of teaching systems, in particular to an auxiliary teaching system by means of virtual reality and software research and development technologies, which comprises a network database module and a registration module, wherein the registration module is in signal connection with an item bank management module, the item bank management module is connected with the network database module, the courseware downloading and publishing module is in signal connection with an alternating current feedback module, the network database module is also connected with a safety maintenance module, a test paper modification module, a test paper analysis module and a score management module are respectively arranged on the network database module through a central controller module, the test paper modification module is modified by means of a calculation function in the central controller module, and the test paper analysis module and the score management module are completed by means of data statistics in the central control module. The invention overcomes the defect of unstable operation, and simultaneously, the student client customizes the learning plan according to the time of the student client, and realizes the effect of quickly correcting the learning content.

摘要：【中文】本发明涉及教学技术领域，尤其是一种基于计算机软件的多媒体教学辅助系统，包括控制器，所述控制器电性连接有字体调节模块、角度调节模块、亮度调节模块、高度调节模块、收卷模块、调节模块、数据库、教师端、学生端，所述调节模块电性连接有照射模块，通过调节模块对照射模块的角度和光照强度进行调节，所述照射模块电性连接有供电电源；所述教师端包括微处理器，所述微处理器电性连接有下载模块、上传模块、搜寻模块，所述搜寻模块信号连接有通讯模块，所述通讯模块信号连接有互联网，所述微处理器与所述控制器信号连接，所述上传模块与所述数据库信号连接。本发明具有有利于增强教学效果的特点。 【EN】The invention relates to the technical field of teaching, in particular to a multimedia teaching auxiliary system based on computer software, which comprises a controller, wherein the controller is electrically connected with a font adjusting module, an angle adjusting module, a brightness adjusting module, a height adjusting module, a winding module, an adjusting module, a database, a teacher end and a student end, the adjusting module is electrically connected with an irradiation module, the angle and the illumination intensity of the irradiation module are adjusted through the adjusting module, and the irradiation module is electrically connected with a power supply; teacher end includes microprocessor, microprocessor electric connection has download module, upload module, search module signal connection has communication module, communication module signal connection has the internet, microprocessor with controller signal connection, upload the module with database signal connection. The invention has the characteristic of being beneficial to enhancing the teaching effect.

摘要：【中文】本发明涉及计算机教学技术领域，尤其是一种计算机软件技术开发的教学系统,包括教学装置，教学装置包括底座，底座底部的四角转动均安装有万向轮，底座顶部的两端均安装有蜗轮蜗杆升降机构，蜗轮蜗杆升降机构的输出端安装有安装板，底座顶部的四角均固定安装有导向杆，导向杆的顶部均固定安装有限位块，安装板的顶部固定安装有导向座，导向座的内部固定安装有滑轨，滑轨上可滑动安装有滑动齿板，滑动齿板的一侧传动连接有传动齿轮，安装板的底部安装有电机，滑动齿板上安装有教师计算机，安装板上安装有网络连接器和控制箱。本发明的教学装置更方便教师操作，从而大大提高了教学效率。 【EN】The invention relates to the technical field of computer teaching, in particular to a teaching system for computer software technology development, which comprises a teaching device, wherein the teaching device comprises a base, universal wheels are respectively installed at the four corners of the bottom of the base in a rotating manner, worm and gear lifting mechanisms are respectively installed at the two ends of the top of the base, an installation plate is installed at the output end of each worm and gear lifting mechanism, guide rods are respectively and fixedly installed at the four corners of the top of the base, limit blocks are respectively and fixedly installed at the tops of the guide rods, a guide seat is fixedly installed at the top of the installation plate, a slide rail is fixedly installed in the guide seat, a sliding toothed plate is slidably installed on the slide rail, a transmission gear is connected to one side of the sliding toothed plate in a transmission manner, a motor is installed at the bottom of the. The teaching device of the invention is more convenient for teachers to operate, thereby greatly improving the teaching efficiency.

摘要：【中文】本发明公开了一种用于高热隧道施工通风的CO₂双层隔热软风管，包括多个端部相连接的风管本体，各风管本体均包括同轴套设在一起的内层风管和外层风管，内层风管和外层风管间形成环形腔体，各风管本体的环形腔体相连通，环形腔体内用于填充CO₂气体；其中，位于两端的两个风管本体的环形通道的端部为封闭状；内层风管用于输送冷空气；各内层风管和外层风管的端部均设置有连接件，相邻的两个风管本体内层风管和外层风管的端部通过连接件相连接。使用该软风管可以有效地阻止冷空气在风管内输送的过程中与洞内高温空气进行热交换，从而达到对施工地点降温的目的；并且方便运输和使用。 【EN】The invention discloses CO for ventilation in high heat tunnel construction₂Double-deck thermal-insulated air hose, including the tuber pipe body that a plurality of tip are connected, each tuber pipe body all includes that coaxial cover establishes inlayer tuber pipe and outer tuber pipe together, forms annular cavity between inlayer tuber pipe and outer tuber pipe, and the annular cavity of each tuber pipe body is linked together, and the internal CO that is used for filling of annular cavity is filled to the internal₂A gas; wherein, the end parts of the annular channels of the two air pipe bodies positioned at the two ends are closed; the inner air pipe is used for conveying cold air; the end parts of the inner air pipes and the outer air pipes are provided with connecting pieces, and the end parts of the inner air pipes and the outer air pipes of the two adjacent air pipe bodies are connected through the connecting pieces.The soft air pipe can effectively prevent cold air from exchanging heat with high-temperature air in the hole in the process of conveying in the air pipe, thereby achieving the purpose of cooling a construction site; and is convenient to transport and use.

摘要：【中文】本发明公开了一种基于风机风量及功率的隧道节能通风方法，远程管理后台将实际风量与S1得到的最大风量进行比较，同时将S3中的有害气体浓度与设定的浓度值进行比较，如果检测风量大于S1得到的最大风量，同时检测有害气体浓度低于设定的浓度值，则风机按照最大风量供风；如果检测风量大于S1得到的最大风量，且同时检测出有害气体浓度高于设定的浓度值，则增大风机的供风量，直至检测的有害气体浓度小于设定的浓度值；如果检测风量小于S1得到的最大风量，同时检测出有害气体浓度高于设定的浓度值，则增大供风量。在保障隧道掌子面空气质量的同时也降低隧道通风成本。 【EN】The invention discloses a tunnel energy-saving ventilation method based on fan air volume and power.A remote management background compares actual air volume with maximum air volume obtained in S1, and simultaneously compares harmful gas concentration in S3 with a set concentration value, if the detected air volume is larger than the maximum air volume obtained in S1, and meanwhile, the detected harmful gas concentration is lower than the set concentration value, the fan supplies air according to the maximum air volume; if the detected air volume is larger than the maximum air volume obtained in S1 and the concentration of the harmful gas is detected to be higher than the set concentration value, increasing the air supply volume of the fan until the detected concentration of the harmful gas is smaller than the set concentration value; if the detected air volume is smaller than the maximum air volume obtained in S1 and the concentration of the harmful gas is detected to be higher than the set concentration value, the air supply volume is increased. The tunnel ventilation cost is also reduced while the air quality of the tunnel face of the tunnel is guaranteed.

摘要：【中文】本发明属于冰塞技术领域，具体涉及一种制冷夹套的排气装置。包括调节螺钉、外套筒和排气管，排气管底部通过螺纹连接的方式安装在制冷夹套排气口上，排气管内部为通孔，从下到上设置有三个台阶面；第一个台阶面与制冷夹套上端面贴合，用来限制排气管底部螺纹拧入的深度；第三个台阶面与调节螺钉头部位置贴合，限制调节螺钉螺纹拧入深度。本发明所述的一种制冷夹套的排气装置，能够通过调节螺钉和外套筒与排气管相对位置的变化改变排气孔的通流面积，控制氮气的排气量，解决了排气量控制不精准、冰塞时间不可控等问题，同时也很好的节省液氮资源。 【EN】The invention belongs to the technical field of ice plugs, and particularly relates to an exhaust device of a refrigeration jacket. The air exhaust pipe comprises an adjusting screw, an outer sleeve and an air exhaust pipe, wherein the bottom of the air exhaust pipe is arranged on an air exhaust port of a refrigeration jacket in a threaded connection mode, a through hole is formed in the air exhaust pipe, and three step surfaces are arranged from bottom to top; the first step surface is attached to the upper end surface of the refrigeration jacket and used for limiting the screwing depth of the threads at the bottom of the exhaust pipe; the third step surface is attached to the head of the adjusting screw to limit the screwing depth of the adjusting screw. According to the exhaust device of the refrigeration jacket, the flow area of the exhaust hole can be changed through the relative position change of the adjusting screw and the outer sleeve with the exhaust pipe, the exhaust volume of nitrogen is controlled, the problems that the exhaust volume is not accurately controlled, the ice plug time is not controllable and the like are solved, and meanwhile, liquid nitrogen resources are well saved.