摘要：本申请涉及数据库技术领域，提供了一种数据库的节点切换方法。本申请实施例的方法，不仅事先为主节点创建物理连接池，还事先为备节点创建物理连接池。在数据库容灾组网进行容灾切换之后，也就是原主节点倒换成备节点，原备节点倒换成新的主节点之后，客户端可以通过主节点的物理连接池，与新的主节点的数据库进行连接，而无需重新为新的主节点创建物理连接池。如此，可以使得数据库容灾组网在进行容灾切换之后快速恢复数据库服务，提升了故障恢复的速度。

摘要：【中文】本发明公开了一种基于机器学习的UWB室内定位方法，首先在在待定位室内均匀布置与服务器连接的多个基站，并将将待定位室内按横向和纵向将空间划分为多个区域构建坐标系，然后在室内采集相关数据后对构建的BP神经网络模型进行训练和验证，最后通过训练完成的BP神经网络模型进行定位，获取位置坐标；优点是定位精度高，定位实时性强。 【EN】The invention discloses a UWB indoor positioning method based on machine learning, which comprises the steps of firstly, uniformly arranging a plurality of base stations connected with a server in a room to be positioned, dividing the space in the room to be positioned into a plurality of areas according to the transverse direction and the longitudinal direction to construct a coordinate system, then training and verifying a constructed BP neural network model after collecting related data indoors, and finally positioning through the trained BP neural network model to obtain position coordinates; the method has the advantages of high positioning precision and strong positioning real-time property.

摘要：【中文】本发明适用于通信技术领域，提供了一种密钥的更新、数据解密方法及装置、客户端及交互系统，所述更新方法包括：确认当前需要更新密钥时，服务端发出获取请求，当前所用的密钥处于有效期内；接收并存储服务端基于获取请求确认可提供时反馈的新密钥，所述新密钥包括对应的生效时间点及有效期；当到达所述生效时间点时，将所述新密钥替代当前使用的密钥，所述当前使用的密钥的有效期的结束点在所述生效时间点之后。本发明中，在旧密钥失效之前以新密钥进行更新，可保证每一次使用密钥进行数据解密后保证数据的正常使用，提高数据传输的可靠性。 【EN】The invention is suitable for the technical field of communication, and provides a method and a device for updating a secret key and decrypting data, a client and an interactive system, wherein the updating method comprises the following steps: when confirming that the key needs to be updated currently, the server side sends out an acquisition request, and the currently used key is in the validity period; receiving and storing a new key fed back by a server when the server confirms to provide based on an acquisition request, wherein the new key comprises a corresponding effective time point and an effective period; replacing the currently used key with the new key when the point in effect time is reached, the end point of the validity period of the currently used key being after the point in effect time. In the invention, the new key is updated before the old key is invalid, so that the normal use of data can be ensured after the data decryption is carried out by using the key each time, and the reliability of data transmission is improved.

摘要：【中文】本发明适用于数据交互技术领域，提供了一种服务的获取方法及装置、服务使用方、交互系统及云端，所述获取方法包括：向资源模块发出查询请求；接收所述资源模块基于所述查询请求反馈的信息，所述信息由服务提供方发布且存储于所述资源模块。本发明中，设置资源模块存储服务提供方提供的信息服务，从资源模块获取需要的信息服务，实现服务提供方与服务使用方的交互，提高交互能力。 【EN】The invention is suitable for the technical field of data interaction, and provides a service acquisition method and device, a service user, an interaction system and a cloud end, wherein the service acquisition method comprises the following steps: sending a query request to a resource module; and receiving information fed back by the resource module based on the query request, wherein the information is issued by a service provider and is stored in the resource module. In the invention, the resource module is arranged to store the information service provided by the service provider, and the required information service is acquired from the resource module, so that the interaction between the service provider and the service user is realized, and the interaction capability is improved.

摘要：本发明提供一种大容量电压源变流器对拖测试平台以及测试方法，包括：试验电源US、断路器QF1、调压器TY、变压器TF、断路器QF2以及试品变流器TO；试验电源US、断路器QF1、调压器TY、变压器TF以及断路器QF2依次串联连接；断路器QF2的输出端与试品变流器TO连接；试品变流器TO包括N个不同电压和功率等级的端口。本发明通过更改控制策略和一次接线改造实现，不需额外的培试变流器装置；可通过调压器调节变压器的输出电压，实现与不同电压等级变流器并网端口的连接，适配性强；不受变流器端口数量和容量的限制，灵活性高。

摘要：本发明涉及空调技术领域，具体涉及一种独立双系统氟泵空调混合模式运行方法，获取环境温度并且根据环境温度运行混合模式，第一制冷系统运行压缩机模式，第二制冷系统运行氟泵模式；设定偏差阈值。本发明通过第一制冷系统运行压缩机模式，第二制冷系统运行氟泵模式，相较于两个系统均同时运行压缩机或氟泵的模式，可充分利用自然冷源，节能性更好；另外在调节的过程中，保证第一制冷系统的制冷量输出与第二制冷系统的制冷量输出之间的偏差不大于设定的偏差阈值，从而能够保证第一制冷系统和第二制冷系统运行时的冷量差异不至于过大，即出风温度差异不至于过大；从而做到双系统的送风温度均匀且双系统的各自的内风机转速差异小。

摘要：【中文】本发明公开了一种换流变用有载分接开关机械状态评估方法及系统，电故障的探测装置技术领域，其包括以下步骤：步骤1：获取待评估的换流变的有载分接开关和标准相换流变的有载分接开关的在相同档位的切换过程中的振动加速度信号波形，步骤2：根据获取的振动加速度信号波形，计算加速度峰值不平衡度、计算振动加速度信号的振荡衰减时间以及进行傅里叶分析以获取振动加速度信号的频谱图；步骤3：根据加速度峰值不平衡度、振动加速度信号的振荡衰减时间以及频谱图，综合判断待检测有载分接开关的机械状态。本发明有效检测传动轴和齿轮故障、驱动电机故障、切换时序异常以及机械结构松动、断裂等机械故障。 【EN】The invention discloses a method and a system for evaluating the mechanical state of an on-load tap-changer for a converter transformer, belonging to the technical field of electrical fault detection devices and comprising the following steps: step 1: obtaining vibration acceleration signal waveforms of the on-load tap-changer of the converter transformer to be evaluated and the on-load tap-changer of the standard converter transformer in the switching process of the same gear, and step 2: according to the waveform of the obtained vibration acceleration signal, calculating the unbalance degree of the acceleration peak value, calculating the oscillation attenuation time of the vibration acceleration signal and carrying out Fourier analysis to obtain a frequency spectrogram of the vibration acceleration signal; and step 3: and comprehensively judging the mechanical state of the on-load tap-changer to be detected according to the acceleration peak value unbalance degree, the oscillation attenuation time of the vibration acceleration signal and the frequency spectrogram. The invention effectively detects mechanical faults such as transmission shaft and gear faults, driving motor faults, switching time sequence abnormity and mechanical structure looseness, breakage and the like.

摘要：【中文】本发明公开了一种便携式现场多频率振动加速度校正系统和方法，系统包括便携式多频率标准振动源、采集卡工控箱和计算机，便携式多频率标准振动源包括圆柱壳体、电池、调制电路、励磁线圈、中心磁极、瓷缸、动圈平台、导向轮、罩盖。方法用于如上所述的便携式现场多频率振动加速度校正系统，本发明标准振动源方便携带到现场进行换流变振动测试，校正系统组成简单，可快速安装进行测试，操作步骤简单。 【EN】The invention discloses a portable field multi-frequency vibration acceleration correction system and a method, wherein the system comprises a portable multi-frequency standard vibration source, an acquisition card industrial control box and a computer, and the portable multi-frequency standard vibration source comprises a cylindrical shell, a battery, a modulation circuit, an excitation coil, a central magnetic pole, a porcelain cylinder, a moving coil platform, a guide wheel and a cover cap. The method is used for the portable field multi-frequency vibration acceleration correction system, the standard vibration source side is portable and carried to the field to carry out the vibration test of the converter transformer, the correction system is simple in composition, can be quickly installed for testing, and is simple in operation steps.

摘要：【中文】本发明公开一种金属色泽仿古砖及其制备方法。所述金属色泽仿古砖的制备方法，包括：在坯体表面喷墨打印有色墨水，然后喷墨打印提高发色鲜艳度和光泽度的发色助熔剂，最后烧成得到具有类金属颜色和纹理的金属色泽仿古砖。 【EN】The invention discloses an archaized brick with metal color and a preparation method thereof. The preparation method of the metal-color archaized brick comprises the following steps: and (3) ink-jet printing colored ink on the surface of the blank, then ink-jet printing a color development fluxing agent for improving color development vividness and glossiness, and finally sintering to obtain the metal color archaized brick with the metal color and texture.

摘要：【中文】本发明公开了一种口罩制造设备总成，包括进料单元、产品对折单元、鼻夹添加单元、口罩主体部封合单元、产品裁切单元、弹性耳片切割单元、产品调向单元和产品封合单元所述口罩的制造先通过进料单元完成口罩主体部片材的叠放，然后通过产品对折单元对口罩主体部片材进行折叠；再通过鼻夹添加单元完成鼻夹的添加；再通过口罩主体部封合单元完成对口罩主体部片材的封合；然后通过产品裁切单元将口罩主体片材裁切成单个口罩主体部；再通过产品调向单元完成对口罩主体部方向的调整，同时经弹性耳片切割单元后，与口罩主体部进行最终封合。本设备总成平稳性好，可实现高速生产，大大提高了口罩的生产效率，可广泛应用于医用及民用的平面口罩加工领域。 【EN】The invention discloses a mask manufacturing equipment assembly which comprises a feeding unit, a product folding unit, a nose clip adding unit, a mask main body sealing unit, a product cutting unit, an elastic lug cutting unit, a product direction adjusting unit and a product sealing unit, wherein the mask is manufactured by firstly stacking mask main body sheets through the feeding unit and then folding the mask main body sheets through the product folding unit; the nose clip is added through a nose clip adding unit; then the sealing unit of the mask body part is used for sealing the sheet of the mask body part; then cutting the mask body sheet into single mask body parts through a product cutting unit; and the adjustment of the direction of the mask main body part is finished through the product direction adjusting unit, and the mask main body part is finally sealed after the mask main body part is cut by the elastic lug pieces. The equipment assembly has good stability, can realize high-speed production, greatly improves the production efficiency of the mask, and can be widely applied to the field of medical and civil plane mask processing.