baber/WOPTO huggingface dataset:
Patent WO-2019196260-A1 (WO)
Title: Method and device for automatically searching for logistics information, terminal device, and readable storage medium
Inventor: LIU ZHEN
IPC: G06Q10/08
Filed: 2018-07-27
Abstract: The present solution is applicable to the technical field of data processing, and provided thereby are a method and device for automatically searching for logistics information, a terminal device and a computer-readable storage medium, the method comprising: extracting information from an application interface of a messaging application so as to obtain a transaction prompt message displayed in the application interface; parsing the obtained transaction prompt message, and determining a transaction application for generating corresponding transaction items; acquiring a plurality of transaction records relating to a user account of a terminal user from the transaction application; determining a transaction record in the plurality of transaction records which matches the transaction prompt message to serve as a target transaction record; and searching for logistics information corresponding to the transaction items according to the target transaction record, and displaying the logistics information in the application interface. The present solution simplifies the operation by the terminal user and improves the efficiency of logistics information transmission.
Patent WO-2019056864-A1 (WO)
Title: Printed circuit board and method for determining insertion state between printed circuit board and flexible circuit board
Inventor: XU BING
IPC: G01R31/04
Filed: 2018-08-01
Abstract: A printed circuit board and a method for determining an insertion state between the printed circuit board and a flexible circuit board. The printed circuit board comprises a substrate (301), and a connector (302) fixed onto the substrate (301) and configured to connect a flexible circuit board. By means of the additional provision of an auxiliary gold finger (3022) on the connector (302) and the cooperation with a determination circuit (303) additionally provided on the substrate (301) and connected to the auxiliary gold finger (3022), an insertion state between first gold fingers (3021) of the connector (302) and second gold fingers (304) of the flexible circuit board can be determined. Therefore, during practical application, a device may be powered on after the insertion state is determined to be normal, such that risks such as high current caused by an insertion abnormality are effectively prevented, the scrap loss is reduced, and the device yield is improved.
Patent WO-2019052413-A1 (WO)
Title: Overlay comment display method and device
Inventor: SU CHAO
IPC: H04N21/431
Filed: 2018-09-10
Abstract: Provided in embodiments of the present disclosure are an overlay comment display method and device. The method comprises: receiving an overlay comment display request sent by a client end, the overlay comment display request comprising a scenario code corresponding to an overlay comment display scenario and a scenario resource; acquiring, from an overlay comment database corresponding to the scenario code, overlay comment content corresponding to the scenario resource; and sending the overlay comment content to the client end for display.
Patent WO-2020061882-A1 (WO)
Inventor: WANG XINGZE
IPC: G01B11/06
Filed: 2018-09-27
Abstract: A method for detecting a defect in a transparent/translucent material, comprising: determining one or more sampling point positions according to a preset sampling configuration; controlling a coherent light source (10) to generate a coherent light beam to irradiate a sampling point, wherein the coherent light beam irradiates a sampling point position of a layered detection material during detection; acquiring, by means of a photosensitive element, interference image information of a light signal reflected by the coherent light beam after irradiating the detection material (30); calculating material thickness information corresponding to the sampling point position according to the interference image information, and determining a defect of the layered detection material according to the material thickness information. In addition, further disclosed are a device that detects a defect in a transparent/translucent material using the method above and a detection system that detects a defect in a transparent/translucent material using the method above. The accuracy of the thickness defect detection of the transparent/translucent layered material may be improved.
Patent WO-2020034363-A1 (WO)
Inventor: XIE HEPING
IPC: E21B25/00
Filed: 2018-09-30
Abstract: 一种取芯钻机与牙钻联锁机构被公开。该牙钻中空，取芯钻机外壁与牙钻内壁滑动配合，牙钻内壁有锁紧槽（9），取芯钻机外壁有锁闩槽（10），锁紧槽（9）和锁闩槽（10）均沿轴向，锁闩槽（10）内有锁闩（2），锁闩槽（10）内连有转轴，转轴沿取芯钻机径向设置，锁闩（2）上有通孔（3），转轴穿过通孔（3），锁闩（2）与转轴转动配合，通孔（3）到锁闩（2）后端的距离大于通孔（3）到锁闩（2）前端的距离，锁闩（2）内侧面有弹簧孔A（25），弹簧孔A（25）为盲孔，弹簧孔A（25）内有压紧弹簧（4），弹簧（4）与取芯钻机接触，弹簧孔A（25）到锁闩（2）后端的距离小于弹簧孔A（25）到锁闩（2）前端的距离，弹簧（4）弹起时，锁闩（2）部分嵌入锁紧槽（9）。该取芯钻机与牙钻联锁机构可限制钻机向前和周向运动，而向后运动不受约束，结构简单，拆装方便。
Patent WO-2019161680-A1 (WO)
Inventor: ZHANG YUXIN
IPC: H01L51/52
Filed: 2018-11-01
Abstract: La présente invention concerne un substrat d'affichage, son procédé de fabrication et un dispositif d'affichage. Le substrat d'affichage comprend : une partie électroluminescente agencée dans une région d'affichage du substrat d'affichage ; un ou plusieurs remblai disposés dans une région de non-affichage du substrat d'affichage, la région de non-affichage entourant la région d'affichage ; et une première partie d'absorption de contrainte, disposée au-dessous d'au moins un remblai.
Patent WO-2020093234-A1 (WO)
Title: Fuel mixture for smelting copper
Inventor: ZHENXIANG ZHU
IPC: C10L5/00
Filed: 2018-11-06
Abstract: Disclosed is a fuel mixture for smelting copper. The fuel mixture comprises: a composite carbon powder, oxygen and natural gas, which are conveyed to a mixing gun through respective conveying pipes therefor and merged, and are finally introduced into the bottom of a copper smelting furnace together via the mixing gun. The composite carbon powder comprises the following components by weight: 70-85 parts of petroleum coke powder, 10-20 parts of ferrocene, and 5-10 parts of 2,6-di-tert-butyl-4-methylphenol. The fuel mixture for smelting copper can be used for different types of pyrometallurgical copper smelting furnaces. The fuel mixture for smelting copper can be used for the regeneration smelting of crude copper and waste copper, as well as the initial smelting of a copper ore. The fuel mixture for smelting copper can enhance mass and heat transfer, improve combustion efficiency, control redox atmosphere, adjust the pH of a slag, etc., thereby saving on the time in a furnace, prolonging the service life of a furnace (lining), reducing the amount of slag copper, saving on fuel costs, and improving comprehensive economic benefits.
Patent WO-2020077745-A1 (WO)
Inventor: LU QIANXI
IPC: H04W16/10
Filed: 2018-11-27
Abstract: L'invention concerne un procédé de configuration de connexion, un dispositif terminal, un dispositif de réseau et un support de stockage. Le procédé comprend les étapes suivantes : un dispositif de réseau configure une connexion de dispositif terminal à dispositif terminal pour un premier dispositif terminal ; et le premier dispositif terminal rapporte, au dispositif de réseau, un état d'une connexion de dispositif terminal à dispositif terminal (S201).
Patent WO-2019120052-A1 (WO)
Inventor: FANG JUN
IPC: H04N5/345
Filed: 2018-11-28
Abstract: 一种用于对光源传递的信息进行解码的方法，所述光源被配置为能够工作于至少两种模式，其中，在不同的模式下，当通过滚动快门成像器件对该光源拍摄时所获得的该光源的图像上呈现出不同的预定外观，以表示不同的数据，所述方法包括：通过滚动快门成像器件对所述光源进行连续拍摄；获取所述光源的若干帧连续图像；针对所述光源的每一帧图像，分别提取出该图像的起始部分和结束部分；对提取出的所述起始部分和结束部分进行分析，以确定每个起始部分和结束部分表示的数据；以及对每一帧图像的结束部分表示的数据和紧随其后的下一帧图像的起始部分表示的数据执行数据去除操作，以确定出所述光源传递的数据序列。
Patent WO-2019128704-A1 (WO)
Title: Ct检查系统和ct成像方法
Inventor: KANG KEJUN
IPC: G01N23/04
Filed: 2018-12-11
Abstract: 一种CT检查系统和CT成像方法，CT检查系统包括放射源装置（1）、探测装置（2）、旋转监控装置和成像装置，其中：探测装置（2）获取探测数据的频率为放射源装置（1）出束频率的N倍；旋转监控装置检测探测装置（2）的旋转角度并在探测装置（2）每旋转预设角度时向成像装置发送信号；成像装置根据旋转监控装置所发送的信号以及探测装置（2）的探测数据确定放射源装置（1）每次出束时探测装置（2）的转动位置信息，并基于放射源装置（1）每次出束时探测装置（2）的探测数据及转动位置信息生成CT图像。系统能够较为准确地确定放射源装置（1）每次出束时探测装置（2）的转动位置信息，从而可以有效减少图像形变，提高检测结果的准确性。
Patent WO-2019128769-A1 (WO)
Title: Mems组件及其制造方法
Inventor: WEN YONGXIANG
IPC: B81B1/00
Filed: 2018-12-18
Abstract: 一种MEMS组件及其制造方法，其中的方法包括：在传感器芯片（110）上形成凹槽（103）；在器件芯片（210）上形成焊盘（203）；将传感器芯片（110）与器件芯片（210）键合，以形成键合组件；在传感器芯片（110）的第一位置（401）执行第一划片，以穿透传感器芯片（110）到达凹槽（103）；以及在传感器芯片（110）的第二位置（402）执行第二划片，以穿透传感器芯片（110）和器件芯片（210），将键合组件分离成单个MEMS组件，其中，凹槽（103）与焊盘的位置相对应，并且在第二划片的同时，在传感器芯片（110）中形成开口，以暴露焊盘（203）。采用两次不同深度的划片暴露传感器芯片（110）的焊盘（203）和切割MEMS组件，从而提高良率和可靠性。
Patent WO-2020024545-A1 (WO)
Title: Highly stable organic electroluminescent lighting screen
Inventor: LEE YU HAO
IPC: H01L51/50
Filed: 2018-12-25
Abstract: A highly stable OLED lighting screen, including a substrate (5) and a plurality of pixelated OLED circuit components (7). An auxiliary electrode (2) and a plurality of circuit protection devices (3) are further provided on the substrate, the circuit protection devices are electrically connected to the pixelated first electrodes (1) in the OLED circuit components on a one-to-one basis, and all the circuit protection devices are electrically connected to the auxiliary electrode (2) respectively; an insulator (6) covers the auxiliary electrode, the circuit protection devices and the region between the circuit protection devices and the OLED circuit components; when the current flowing through the pixels on short-circuit points in the OLED circuit components is greater than a fusing threshold set in a circuit protection device, the circuit protection device corresponding to the pixels of short-circuit points is in a blown state, and the OLED circuit component corresponding to the pixels of the short-circuit points is isolated from the OLED circuit components corresponding to normal pixels. By performing isolation control on an OLED circuit component having a defect, defect protection is performed on the OLED lighting screen in real time, thereby improving the reliability of the screen.
Patent WO-2019129152-A1 (WO)
Inventor: WANG XIAOLEI
IPC: F21V17/10
Filed: 2018-12-27
Abstract: A mounting assembly and light source module for an optical component (400) of a lighting fixture, and a lighting fixture, comprising a base (100), a top support (200) and at least two side frames (300); an end of the at least two side frames (300) is connected to the base (100), and the other end is connected to the top support (200); the at least two side frames (300) and the base (100) and the top support (200) enclose to form a mounting space used for fixing the optical component (400); the at least two side frames (300) are distributed around the optical component (400) and are used to connect to a side edge of the optical component (400). The solution may solve the problem wherein an optical component (400) of a lighting fixture being fixed by using a screw connector causes assembly and disassembly operations to be tedious and affects the distribution of light.
Patent WO-2020124685-A1 (WO)
Inventor: HAN CAIFENG
IPC: H01H13/705
Filed: 2019-01-07
Abstract: 一种可收合平衡架按键开关，包括底座（1）、活动板（2）、平衡架（3）、传动件（6）和键帽（4），底座（1）上安装活动板（2），活动板（2）沿着底座（1）左右滑动，活动板（2）上方为平衡架（3），平衡架（3）包括左右设置的左支架（31）和右支架（32），一个支架的下端与活动板（2）连接，另一个支架的下端连接底座（1），在传动件（6）的作用下两个支架同步运动，复位弹簧（5）的两端分别连接在两个支架上或者连接在支架和键帽（4）上，两个支架上端均与键帽（4）连接。当左右推动活动板（2）时，平衡架（3）随活动板（2）发生转动，键帽（23）随之上下运动，从而实现了按键的可收合。并且，收合时不与复位弹簧（5）产生干涉，减少了收合所需要的力。另外，本按键开关保证了键帽(23)上下运动的平稳性，避免了键帽(23)歪斜卡磕或者是触发不良等问题。
Patent WO-2020143062-A1 (WO)
Title: 无线通信方法和终端
Inventor: ZHAO ZHENSHAN
IPC: H04W28/04
Filed: 2019-01-11
Abstract: 本申请实施例提供一种无线通信方法和终端，可以避免资源浪费。该方法包括：第一终端接收第二终端采用第一侧行链路发送的第一传输块TB；所述第一终端采用第二侧行链路向所述第二终端发送针对所述第一TB的反馈信息，所述反馈信息是基于编码块组CBG的反馈信息。
Patent WO-2020113806-A1 (WO)
Title: Grader
Inventor: GAO LE
IPC: E02F3/76
Filed: 2019-01-28
Abstract: Disclosed is a grader, comprising a frame (4) and a swing frame (10), wherein the swing frame (10) comprises a supporting beam assembly (1) and connecting parts (2, 3); the supporting beam assembly (1) comprises a plurality of beam members (11, 12, 13), and the ends of the plurality of beam members (11, 12, 13) are connected in sequence, so that the plurality of beam members (11, 12, 13) create a closed shape; the connecting parts (2, 3) are arranged on connecting ends of two adjacent beam members (11, 12, 13); and at least one of the connecting parts (2, 3) is rotatably connected to the frame (4), and at least the other of the connecting parts (2, 3) is rotatably connected to a driving part. Under the same bearing capacity, the supporting beam assembly (1) is smaller in structure, each beam has a bearing function, and the occupied area and the weight are smaller, thereby facilitating the implementation of making the whole vehicle lightweight.
Patent WO-2019154288-A1 (WO)
Title: Cationic compound and preparation method therefor and use thereof
Inventor: LIU JIN
IPC: C07D205/04
Filed: 2019-01-31
Abstract: Disclosed in the present invention are a cationic compound, a preparation method therefor and a use thereof. Provided by the present invention is a compound represented by formula I having a novel structure, or a pharmaceutically acceptable salt thereof, or a stereoisomer thereof, or a solvate thereof, or a prodrug thereof, or a metabolite thereof, the compound having a fast acting time, and having a long-acting local anesthetic effect after a single administration, wherein the time for which the sensory nerves are blocked is longer than the time for which the motor nerves are blocked; the compound has both a long-acting local anesthetic effect and a selective local anesthetic effect, significantly reducing the side effects of QX314 and QX314 compositions as well as cationic compounds having surfactant structural features, and being more safe; which is to say that the compound represented by formula I of the present invention and the pharmaceutically acceptable salt thereof may be used for the preparation of a safe drug having a long-acting local anesthetic effect and a selective local anesthetic effect, having the advantages of a long-acting local anesthetic effect, good local anesthetic selectivity, reduced nerve damage and greater safety.
Patent WO-2019154412-A1 (WO)
Inventor: HUANG ZHENHUA
IPC: A61K31/4412
Filed: 2019-02-11
Abstract: 本发明提供一种下述通式（I）所示的新型抗菌剂化合物、其药学上可接受的盐、酯、其前体药物、其溶剂化物、氘代物或其立体异构体。本发明的化合物表现出优异的抗菌活性，特别是针对革兰氏菌表现出优异的抗菌活性。式中，各基团定义如说明书中所述。
Patent WO-2020164069-A1 (WO)
Title: Amélioration de la mobilité dans un état connecté
Inventor: WANG SIQI
IPC: H04W36/00
Filed: 2019-02-14
Abstract: L'invention concerne des procédés, des systèmes et des dispositifs se rapportant à une communication sans fil numérique et, de façon plus précise, à des techniques se rapportant à l'amélioration de la performance de mobilité. Dans un aspect donné à titre d'exemple, un procédé de communication sans fil consiste à recevoir une transmission qui comporte des informations conditionnelles pour un transfert intercellulaire du terminal. Le procédé consiste également à déterminer si une cellule candidate remplit une condition pour un transfert intercellulaire en fonction des informations conditionnelles. Dans un autre aspect donné à titre d'exemple, un procédé de communication sans fil consiste à déterminer qu'il n'y a pas de signal de référence ayant une autorisation de liaison montante configurée avec une valeur de mesure qui dépasse une valeur de seuil. Le procédé consiste également à initier une procédure d'accès aléatoire. Dans un autre aspect donné à titre d'exemple, un procédé de communication sans fil consiste à générer des informations conditionnelles pour un transfert intercellulaire d'un terminal. Le procédé consiste également à transmettre une transmission qui comporte les informations conditionnelles au terminal.
Patent WO-2019205825-A1 (WO)
Title: Method for determining clock source and device
Inventor: ZHU FANGYUAN
IPC: H04W56/00
Filed: 2019-03-12
Abstract: Provided is a method for determining clock source and device. The method comprises: the session management network element receives a session request from the mobility management network element, the session request includes information of the network slice and the DNN, and the session request is used to request to create a session; the session management network element determines the clock source information corresponding to the information of the network slice and the DNN; the session management network element sends the clock source information to the access network device, the clock source information is used for clock synchronization between the access network device and the terminal device. In the method, the session management network element determines the clock source information corresponding to the information of the network slice and the DNN according to the received information of the network slice and the DNN, and sends the clock source information to the access network device, the access network device performs clock synchronization according to the clock source and the terminal device, so that a clock source for clock synchronization is selected for the access network device and the terminal device.
Patent WO-2020191521-A1 (WO)
Inventor: YANG LIN
IPC: C12N15/11
Filed: 2019-03-22
Abstract: Provided are a nucleotide sequence, and a method for constructing an RNA target area sequencing library and an application thereof. The nucleotide sequence comprises a first general sequencing sequence located at terminus 5' and a random primer sequence located at terminus 3' which are connected to each other. The random primer sequence contains 6-10 random nucleotides. The sequence is used to perform random reverse transcription on RNA to obtain a first chain of cDNA, and then the first general sequencing sequence on the nucleotide sequence and upstream and downstream specific primers are used to perform two-step nested PCR on the first chain of cDNA obtained after the reverse transcription, to obtain a high-throughput targeted sequencing library.
Patent WO-2020133750-A1 (WO)
Inventor: YOU KAIJIE
IPC: H01M50/209
Filed: 2019-03-25
Abstract: 本发明提供了一种电池包，包括多个电池和箱体，多个电池收容在箱体内；各电池包括防爆阀；箱体包括用于支撑电池的下箱体以及与下箱体配合的上箱体，上箱体包括上板以及下板，下板与上板盖合并形成用于收容灭火剂的收容空间；各电池的防爆阀面对上箱体的下板，下板设置成能够被熔化后泄出收容空间中的灭火剂。在电池发生热失控时，热失控产生的高温气体和/或火焰会熔穿上箱体的下板的与防爆阀对应的位置，从而下板上形成被熔穿的烧熔区域，下板中的灭火剂从烧熔区域中迅速流出到达失控区域，一方面灭火剂对高温气体降温和/或扑灭火焰，另一方面，流出的灭火剂会进入防爆阀内部，以降低电池的温度，从而抑制电池的热失控。
Patent WO-2019196728-A1 (WO)
Inventor: HONG KUI
IPC: A61P5/32
Filed: 2019-04-04
Abstract: 本发明公开了一种雌激素受体下调剂的应用。属于医药技术领域。为了解决现有技术中新结构的雌激素受体下调剂种类较少的问题，本发明提供通式I或II的二倍半萜类化合物作为雌激素受体α下调剂的应用。体外抗肿瘤活性实验证实，通式I或II化合物对几种肿瘤细胞均具有增殖抑制作用，都能下调MCF-7中雌激素受体α的蛋白水平，抑制ESR1转录合成hnRNA和相应的mRNA。因此，通式I或II化合物可用于制备抗乳腺癌及治疗其他雌激素受体相关疾病的药物。
Patent WO-2019214450-A1 (WO)
Title: Air interface inactive state maintaining method and device
Inventor: YANG LI
IPC: H04W76/27
Filed: 2019-04-25
Abstract: Provided are an air interface inactive state maintaining method and device. The method comprises: receiving an RRC uplink notification message sent by a UE, the RRC uplink notification message carrying information indicating that the UE is out of serving cell coverage of a source secondary node; on the basis of the RRC uplink notification message, performing a migration operation of a related high-level configuration of a PDU session anchored on the source secondary node side by the UE, and a migration target node being a target secondary node or a current master node (MN); after performing the migration operation of the high-level configuration, sending an RRC downlink reply message to the UE; and enabling the UE to still maintain in a dual-connectivity or single-connectivity air interface inactive state. By means of the solution of the present disclosure, when the secondary node of the UE changes, the MN can timely know that the UE moves from the source secondary node to the serving cell coverage of the target secondary node, and ensures that a network side connection state and the related high-level configuration can be maintained consistent with the latest moving state of the UE, so as to provide a solution for supporting the UE to maintain in the inactive state.
Patent WO-2020215347-A1 (WO)
Inventor: WU GENBIAO
IPC: A63H17/267
Filed: 2019-04-29
Abstract: A remote control car having a simple servo control system, comprising a car body. Driving wheels are rotatably arranged on the car body; simple coding discs (7) are arranged in a manner of synchronously rotating with the driving wheels (2A, 2B, 2C, 2D), and when the simple coding discs (7) rotate, a photoelectric receiving tube (53) is continuously switched on and switched off to form a pulse signal; motors (5A, 5B), a remote control receiving unit, and the photoelectric receiving tube (53) are electrically connected to a master control unit, separately; the remote control receiving unit receives an instruction sent by a remote controller and sends the instruction to the master control unit to convert the instruction into a desired rotating speed signal indicative of a desired rotating speed of the driving wheel; the pulse signal formed by the photoelectric receiving tube (53) is sent to the master control unit to be converted into an actual rotating speed signal indicative of an actual rotating speed of the driving wheel; the master control unit calculates a difference between the desired rotating speed signal and the actual rotating speed signal to drive the motor to increase or decrease the rotating speed, so that the actual rotating speed signal gets close to the desired rotating speed signal. The present remote control car can accurately monitor and control the rotating speed of the wheel at lower costs.
Patent WO-2020223851-A1 (WO)
Inventor: SHEN XIANGHONG
IPC: B23Q11/00
Filed: 2019-05-05
Abstract: An easy-clean roller shaft cutting device comprises a workbench (1). A top sidewall of the workbench is provided with a cylinder (2), a motor (5) and a shroud (9). An extendable rod (3) is provided at the left side of an output end of the cylinder (2). Fixtures (4) are respectively provided at the front and rear ends of a left portion of the extendable rod (3). A cutter (6) is provided at the rear side of an output end of the motor (5). An accommodation recess (10) is formed at the workbench (1). A transport device (7) is provided in an internal cavity of the accommodation recess (10). A material discharge opening (8) fitting the transport device (7) is formed at the left side of the workbench (1). The easy-clean roller shaft cutting device enables scraps to be collected easily, thereby preventing the scraps from negatively affecting equipment.
Patent WO-2020093686-A1 (WO)
Inventor: CHEN FAPU
IPC: C07D207/44
Filed: 2019-05-28
Abstract: 本发明公开了一种用胆绿素Ⅸα二酯制备高含量胆红素Ⅸα的方法。属于胆红素Ⅸα制备领域。该方法包括如下步骤(先水解后还原路线)：在胆绿素Ⅸα二酯的醇溶液中，滴加氢氧化钠的甲醇溶液，加入水后水解，然后用弱酸调节pH到4～5，旋转蒸发除溶剂，水洗除无机盐，真空干燥后得到胆绿素Ⅸα。在胆绿素Ⅸα的醇溶液中，加入游离基清除剂(稳定剂)，加入还原剂硼氢化物，在还原反应结束时，立即加入酮分解过量的还原剂，然后用弱酸调节pH到4～5，旋转蒸发除溶剂，然后水洗，甲醇-氯仿精制后得到含量超97％的胆红素Ⅸα。该方法不需要色谱分离，反应条件温和，成本低，操作方便，适于工业化大生产。
Patent WO-2020007223-A1 (WO)
Title: Method for controlling earphone switching and earphone
Inventor: GONG JINHUA
IPC: G06F3/16
Filed: 2019-06-26
Abstract: A method for controlling earphone switching and an earphone are provided. The method includes the following. A first earphone acquires a first remaining power and a first operating parameter of the first earphone and a second remaining power and a second operating parameter of a second earphone. The second earphone serves as a slave earphone. The first earphone predicts a first battery life of the first earphone according to the first remaining power and the first operating parameter and a second battery life of the second earphone according to the second remaining power and the second operating parameter. The first earphone predicts switches the second earphone to serve as a master earphone and the first earphone to serve as a slave earphone, when a difference between the second battery life and the first battery life is greater than a first preset threshold.