baber/WOPTO huggingface dataset:
Patent WO-2021139251-A1 (WO)
Title: Server system anomaly detection method and apparatus, computer device, and storage medium
Inventor: ZHENG LIYING
IPC: G06F11/30
Filed: 2020-09-28
Abstract: A server system anomaly detection method and apparatus, a computer device, and a storage medium. The method comprises: according to multivariate time sequence data of various indicators generated by a server system, constructing a multiscale signature matrix (S202); inputting the multiscale signature matrix into a convolution layer to encode a spatial pattern of the multiscale signature matrix, and outputting a spatial feature map (S204); inputting the spatial feature map into an attention-based convolutional long short-term memory network layer, and updating a hidden state of the spatial feature map by means of the attention-based convolutional long short-term memory network layer, to obtain an updated spatial feature map (S206); inputting the updated spatial feature map into a deconvolution layer to decode and reconstruct the updated spatial feature map, to obtain a reconstructed signature matrix (S208); comparing the reconstructed signature matrix and the multiscale signature matrix, and determining an anomalous indicator of the server system (S210). In addition, the method also relates to blockchain technology, in that multivariate time sequence data may be stored in a blockchain. The method can increase anomaly detection accuracy.
Patent WO-2022047886-A1 (WO)
Inventor: SHI WEILING
IPC: H02K41/02
Filed: 2020-10-12
Abstract: A linear motor, comprising: a base (10); a sliding seat (20), the sliding seat (20) and the base (10) sliding relative to each other in a sliding direction; at least two primary assemblies (40) which are spaced apart in a first direction perpendicular to the sliding direction and are fixed to the base (10), wherein each of the primary assemblies (40) comprises a plurality of armature coils (42) arranged at intervals in the sliding direction; a secondary assembly (30) which is fixed to the sliding seat (20) and is positioned between the at least two primary assemblies (40), wherein the secondary assembly and the primary assemblies (40) are arranged at intervals in the first direction, and the secondary assembly (30) is used to generate a secondary magnetic field; and at least two electric brush assemblies (70) fixed to the sliding seat (20), wherein the electric brush assemblies (70) are electrically conducted with the armature coils (42) corresponding to the secondary assembly (30), such that the primary assemblies (40) generate a primary magnetic field, and the primary magnetic field and the secondary magnetic field interact with each other, such that the sliding seat (20) and the base (10) move relative to each other. The linear motor has a simple structure and reduced costs.
Patent WO-2021232668-A1 (WO)
Title: Biodegradable foam midsole material and preparation method therefor
Inventor: XIONG ZUJIANG
IPC: C08K3/013
Filed: 2020-10-19
Abstract: The present invention provides a biodegradable foam midsole material prepared from a biodegradable resin material. The biodegradable resin material comprises the following components: 100 parts by weight of a biodegradable resin; 0.5-5 parts by weight of masterbatch; 0.5-10 parts by weight of a nucleating agent; 0.2-1 part by weight of an antioxidant; 0-1.5 parts by weight of stearic acid; and 0-1 part by weight of a cell stabilizer. Compared with the prior art, the biodegradable foam midsole material provided by the present invention uses specific amounts of specific components, thus implementing good interaction. The product not only has light density and a high resilient property, but also has a good mechanical property and antifatigue property, thus providing a wearer with good wearing and running experience while greatly reducing the weight of a sports shoe. In addition, the biodegradable foam midsole material has a biodegradable property and can be degraded by enzymes of natural microorganisms after being abandoned after use, and the degraded product can be absorbed and metabolized as a carbon source by the microorganisms. Therefore, the biodegradable foam midsole material would not pollute the environment after being abandoned.
Patent WO-2021078202-A1 (WO)
Inventor: LI ZHAOZAO
IPC: H04W56/00
Filed: 2020-10-22
Abstract: 本发明实施例公开了一种飞行器时间同步系统及方法。该系统包括：第一通信模块和第二通信模块，第一通信模块和第二通信模块之间通过通信线进行数据传输，第一通信模块的I/O接口通过中断信号线与第二通信模块的I/O接口连接；第一通信模块通过通信线向第二通信模块发送数据信息，同时将触发的中断信号通过中断信号线发送给第二通信模块；其中，数据信息包含发送数据信息和触发中断信号时的发送时间；第二通信模块，基于根据数据信息和中断信号的接收时间以及发送时间，所确定的与第一通信模块的通信时间差和系统时间差，和第一通信模块进行时间同步。实现了飞行器不同通信模块间的时间精准同步，从而准确控制飞行器运动。
Patent WO-2022095010-A1 (WO)
Title: Methods and apparatus for rasterization of compute workloads
Inventor: ZHANG YIBIN
IPC: G06T1/00
Filed: 2020-11-09
Abstract: The present disclosure relates to methods and apparatus for graphics processing, e.g., a GPU. The apparatus may receive an image including a plurality of pixels associated with one or more workgroups and one or more pixel tiles, each of the workgroups and the pixel tiles including one or more pixels of the plurality of pixels. The apparatus may determine whether the one or more workgroups are misaligned with the one or more pixel tiles. The apparatus may determine a conversion order of the one or more workgroups when the one or more workgroups are misaligned with the one or more pixel tiles, the conversion order corresponding to a common multiple of one of the one or more workgroups and one of the one or more pixel tiles. The apparatus may convert each of the one or more workgroups based on the conversion order of the one or more workgroups.
Patent WO-2021110136-A1 (WO)
Inventor: ZHAI YIFAN
IPC: A61K31/407
Filed: 2020-12-04
Abstract: Described herein are methods of treating a cancer, for example, a hematologic malignancy or a solid tumor, in a patient in need thereof, comprising administering to the patient a Bcl-2 inhibitor in combination with a second anti-cancer agent.
Patent WO-2022134029-A1 (WO)
Inventor: YANG SONG
IPC: G02F1/1335
Filed: 2020-12-25
Abstract: A display panel (1), a method for manufacturing the display panel (1), and a display device, which belong to the field of liquid crystal display. The display panel (1) comprises an array substrate (101), a box alignment substrate (102), and a liquid crystal layer (103) located between the array substrate (101) and the box alignment substrate (102). The array substrate (101) comprises a first base substrate (1011), and a thin film transistor array (1012), a diffuse reflection layer (1013) and a first flat layer (1014) which are stacked on the first base substrate (1011); one surface of the diffuse reflection layer (1013) close to the first flat layer (1014) being a reflection surface (10131); the reflection surface (10131) being provided with a plurality of protruding structures (10131a); and the protruding structures (10131a) being used for carrying out diffuse reflection on light irradiated onto the reflection surface (10131), such that the first flat layer (1014) can separate the protruding structures (10131a) from the liquid crystal layer (103), so as to prevent the protruding structures (10131a) from influencing the driving effect of the liquid crystal layer (103). The problem of the poor display effect of a display panel in the prior art is solved, thereby improving the display effect of the display panel.
Patent WO-2022147709-A1 (WO)
Title: 一种通信方法和装置
Inventor: XIA XIN
IPC: H04B7/06
Filed: 2021-01-07
Abstract: 本申请提供了一种通信的方法和装置，该方法包括：网络设备在第一资源单元向第一终端设备发送第一信号；该网络设备在第二资源单元接收第四信号，该第二资源单元与该第一资源单元至少部分重合或相邻；该网络设备使用第一波束赋形BF权值发送下行数据，该第一BF权值是根据对该第四信号的信号处理获得的，该信号处理的运算量小于矩阵求逆或矩阵分解的运算量。本申请提供的通信的方法，将空口作为计算资源，能够降低基带的计算复杂度。
Patent WO-2022121077-A1 (WO)
Inventor: KANG MENGMENG
IPC: G06T1/20
Filed: 2021-01-08
Abstract: 一种基于FPGA的图像处理方法、装置、设备及介质，包括：获取到待处理图像中的目标像素点后，从预先存储的查找表中查找邻域像素点对应的权重值以及像素差值与权重值的乘积，然后根据查找到的值对目标像素点进行双边滤波。应用以上技术方案，将空域权重和值域权重计算中复杂的指数运算由实时计算改为查表，在FPGA中无需进行指数运算与乘法运算，降低了运算压力，减小了双边滤波中除法运算的带宽压力；由于查表的速度远大于指数运算与乘法运算的速度，因此进一步提升了应用双边滤波进行图像处理的速度，满足了图像处理中实时性的要求。
Patent WO-2022155804-A1 (WO)
Inventor: LI HAIXIAN
IPC: G06F1/16
Filed: 2021-01-20
Abstract: L'invention divulgue une tablette intelligente interactive, comprenant un module de commande tactile d'affichage et un cadre disposé autour du module de commande tactile d'affichage, le module de commande tactile d'affichage comprenant une plaque de recouvrement, un écran tactile et un écran à cristaux liquides. Le cadre comprend un corps de cadre ; le corps de cadre a une face latérale interne à proximité du module de commande tactile d'affichage ; une partie enfichable fait saillie à partir de la face latérale interne ; la plaque de recouvrement comprend une première face latérale et une seconde face latérale, qui sont en regard l'une de l'autre ; la première face latérale et la seconde face latérale sont reliées par l'intermédiaire d'une face latérale marginale ; une rainure enfichable est évidée dans la face latérale marginale ; la partie enfichable est enfichée dans la rainure enfichable ; l'écran tactile est disposé sur la seconde face latérale et recouvre la seconde face latérale ; et l'écran à cristaux liquides est disposé sur une face latérale de l'écran tactile tournée à l'opposé de la plaque de recouvrement. La rainure enfichable est disposée sur la face latérale marginale de la plaque de recouvrement et est reliée par enfichage à la partie enfichable du cadre, de telle sorte que la plaque de recouvrement puisse être fixée sur le cadre et l'écran tactile et l'écran à cristaux liquides sont également fixés sur la seconde face latérale de la plaque de recouvrement d'une manière complètement ajustée et, ainsi, un support destiné à supporter la plaque de recouvrement peut être omis, la largeur d'un bord noir de la tablette intelligente interactive est efficacement réduite et l'effet d'affichage est amélioré.
Patent WO-2021203820-A1 (WO)
Inventor: HUANG HUANKUN
IPC: G06F16/27
Filed: 2021-02-03
Abstract: 一种基于区块链的数据同步方法、装置及计算机可读存储介质，该方法由第一业务节点执行，该方法包括：根据第一本地区块高度获取目标区块数据(S101)；第一本地区块高度指第一业务节点在获取目标区块数据之前，本地区块数据中的最高区块高度；目标区块数据中的最小区块高度大于第一本地区块高度；根据目标区块数据中的区块高度和第一本地区块高度，确定缺失区块数据的区块高度(S102)；缺失区块数据的区块高度小于目标区块数据中的最小区块高度，且大于第一本地区块高度；根据缺失区块数据的区块高度，向目标业务节点请求同步缺失区块数据(S103)。采用本方法，可提高缺失区块数据的同步效率。
Patent WO-2021160026-A1 (WO)
Title: Beam report method, network node and terminal
Inventor: YANG ANG
IPC: H04W24/10
Filed: 2021-02-05
Abstract: Provided are a beam report method, a network node and a terminal, relating to the technical field of communications. The beam report method is applied to a network node, and comprises: sending a channel state information report configuration to a terminal; and receiving a beam report reported by the terminal according to the channel state information report configuration, wherein group-based beam reporting in the channel state information report configuration is set to enable, the function of an adjacent network node associated with the beam report is activated, and the beam report is associated with the adjacent network node.
Patent WO-2021164601-A1 (WO)
Title: Information transmission method and apparatus, related device, and storage medium
Inventor: HU LIJIE
IPC: H04W72/00
Filed: 2021-02-07
Abstract: Provided is an information transmission method and apparatus, a network device, a terminal, and a storage medium. The method comprises: a network device sends indication information to a terminal, the indication information indicating at least one of the following: at least one time domain and/or frequency domain resource, wherein the at least one time domain and/or frequency domain resource is used for enabling the terminal to determine its own time domain and/or frequency domain resource for receiving information and/or transmitting information; whether the time domain and/or frequency domain resource corresponding to the indication information allows access by a terminal; the types of terminals that are allowed to access the time domain and/or frequency domain resource corresponding to the indication information; at least one terminal processing capability supported by the time domain and/or frequency domain resource corresponding to the indication information; priorities of the types of terminals that are allowed to access the time domain and/or frequency domain resource corresponding to the indication information; and the type of the terminal having the highest priority that is allowed to access the time domain and/or frequency domain resource corresponding to the indication information.
Patent WO-2021212973-A1 (WO)
Inventor: ZHANG SHIPU
IPC: E04H6/42
Filed: 2021-02-08
Abstract: The present invention relates to the technical field of parking garages, and disclosed is a multi-elevator vertically-lifting three-dimensional parking garage. The parking garage comprises a base, an elevator guide rail group, elevator guide rail seats, first guide rails, second guide rails, clamping mechanisms, annular parking spaces, and vehicle body adjustment devices; the elevator guide rail group is disposed on the base, the base is in shafting connection with the elevator guide rail group, the multiple elevator guide rail seats capable of sliding up and down are disposed on the elevator guide rail group, the elevator guide rail seats are hingedly connected to the first guide rails, the first guide rails are hingedly connected to the second guide rails in a sliding manner, the second guide rails are connected to the clamping mechanisms in a sliding manner, the annular parking spaces are disposed on the periphery of the elevator guide rail group in a surrounding manner, an upper end of the elevator guide rail group is in shafting connection with the top of the annular parking spaces, and each parking space at entrance and exit layers of the annular parking spaces is provided with the vehicle body adjustment device. In the present invention, by means of coordinated operation of multiple elevators, the space of the parking garage is reduced, the efficiency of parking and picking up of vehicles is improved, a contradiction between the efficiency of parking and picking up of the vehicles and the number of parking spaces is solved, and smart city platform management is performed on the basis of automatic operation.
Patent WO-2021190235-A1 (WO)
Title: 空调器的冷媒流量控制方法及系统
Inventor: LIU SHOUYU
IPC: F24F11/89
Filed: 2021-02-25
Abstract: 一种空调器的冷媒流量控制方法及系统，方法包括：步骤S1：在空调器制热模式下，实时监测空调器中室外机的环境温度和压缩机底部温度；步骤S2：判断室外机的环境温度是否小于等于预设的第一温度阈值，以及压缩机底部温度是否小于等于预设的第二温度阈值；若是，则转至步骤S3；若否，则转至步骤S4；步骤S3：减小位于室外机中蒸发器冷媒入口侧的电子膨胀阀的开度，以降低流入蒸发器的冷媒流量，随后转至步骤S2；步骤S4：根据压缩机的吸气过热度实际值与预设的吸气过热度目标值的比较结果调节电子膨胀阀的开度，以调整流入蒸发器的冷媒流量，随后转至步骤S2。该方法根据制热状态选择不同的流量调整策略来调整流入蒸发器的冷媒流量，以保证在空调制热过程中，压缩机底部不会产生大量液态冷媒并被吸入压缩机内部。
Patent WO-2022041698-A1 (WO)
Inventor: SONG HONGGUO
IPC: A41D13/005
Filed: 2021-03-19
Abstract: A PCM cooling garment, comprising a garment body (10) and a cooling material provided in the garment body (10). The cooling material is a phase change material. The garment body (10) comprises an inner layer and an outer layer; connection layers (12) distributed in the shape of a mesh are formed between the inner layer and the outer layer; sealed material storage spaces (13) are formed between the inner layer and the outer layer by means of the connection layers (12); the cooling material is stored in the sealed material storage spaces (13), such that the PCM cooling garment can cool a human body after absorbing cold energy. The PCM cooling garment features a long-lasting significant effect and high applicability, and has strong promotion significance.
Patent WO-2022183539-A1 (WO)
Inventor: YU YANG
IPC: A61K31/7048
Filed: 2021-03-23
Abstract: 本发明提供了一种用于治疗脓毒症的药物组合物及其应用，属于化学药物技术领域。本发明提供一种包含羟基红花黄色素A、芍药苷和芍药内酯苷三组分药物组合物，还提供了一种包含羟基红花黄色素A、芍药苷、芍药内酯苷、氧化芍药苷、洋川芎内酯I、丹参素钠和阿魏酸的七组分药物组合物，本发明在细胞水平和动物水平验证两组药物组合物均具有效治疗脓毒症的药效，同时药物毒性实验表明该药物具有较高的安全性。本发明提供的药物组合物是血必净注射液的药效成分，可用于临床上脓毒症的治疗。
Patent WO-2022174491-A1 (WO)
Inventor: ZHU ZHAOWEI
IPC: G16H10/60
Filed: 2021-03-26
Abstract: L'invention concerne un procédé et un appareil fondés sur l'intelligence artificielle pour le contrôle qualité des dossiers médicaux, un dispositif informatique et un support de stockage. Le procédé consiste à : obtenir le contenu textuel d'un dossier médical à évaluer, effectuer une sélection des informations de contenu textuel importantes sur le contenu textuel, et obtenir des informations de contenu textuel importantes figurant dans le contenu textuel ; obtenir une image du dossier médical à évaluer, effectuer une sélection des informations d'image importantes sur l'image, et obtenir des informations d'image importantes figurant sur l'image ; effectuer une fusion de vecteurs sur les informations de contenu textuel importantes et sur les informations d'image importantes, et obtenir un vecteur fusionné ; et entrer le vecteur fusionné dans un modèle de contrôle qualité pré-entraîné et obtenir un résultat de classification indiquant si le dossier médical à évaluer est aux normes ou pas. Le dossier médical à évaluer peut être stocké dans une chaîne de blocs.
Patent WO-2021204068-A1 (WO)
Inventor: YANG RENHUI
IPC: G06F21/60
Filed: 2021-04-02
Abstract: 本说明书实施例公开了一种可验证声明的存储方法、装置及设备。方案包括：用于存储可验证声明的数据仓库获取可验证声明存储请求，并获取该请求的发送方的分布式数字身份标识，根据发送方的分布式数字身份标识可以判断发送方是否具有数据仓库的使用权限；如果发送方具有数据仓库的使用权限，就可以将发送方请求存储的可验证声明存储至数据仓库的数据库。
Patent WO-2022205401-A1 (WO)
Inventor: LIU KAISHEN
IPC: E21B43/26
Filed: 2021-04-02
Abstract: A fracturing system (100), a control system (10) for a fracturing system (100), and a method for controlling a fracturing system (100) during well site work. The control system (10) comprises: a fracture control apparatus (1), the fracture control apparatus (1) being able to acquire a target fracturing pressure of a fracturing device (101), perform closed-loop control on the fracturing device (101) using the target fracturing pressure as a control target, and set a target sand mixing pressure for a sand mixing device (102); and a sand mixing control apparatus (2), the sand mixing control apparatus (2) performing closed-loop control on the sand mixing device (102) using the target sand mixing pressure as a control target.
Patent WO-2021233017-A1 (WO)
Inventor: TIAN KUAN
IPC: G06T7/11
Filed: 2021-04-13
Abstract: 本申请实施例提供一种图像处理方法、装置、设备及计算机可读存储介质，其中，方法包括：对待处理图像中的每一标注点进行迭代扩张，得到对应标注点的迭代扩张区域；分别确定所述迭代扩张区域与所述划分区域之间的第一损失结果、和所述迭代扩张区域与所述标注点之间的第二损失结果；当所述第一损失结果和所述第二损失结果，满足迭代终止条件时，停止对所述标注点的迭代扩张；将停止所述迭代扩张时得到的迭代扩张区域，确定为所述待处理图像中的待分割对象所在的区域。
Patent WO-2022232963-A1 (WO)
Title: Technologies for in-device coexistence in network communication
Inventor: CUI JIE
IPC: H04W72/00
Filed: 2021-05-04
Abstract: The present application relates to devices and components including apparatus, systems, and methods for non-terrestrial network communication in wireless communication systems. An embodiment includes a method comprising: initiating a process to configure a user equipment (UE) for connection to a Non-Terrestrial Network (NTN) serving cell; obtaining an indication that the UE has a serving connection on a Global Navigation Satellite System (GNSS) -interfering band; and in response to the indication, terminating the process to configure the UE for connection to the NTN serving cell. Other embodiments are disclosed.
Patent WO-2021223726-A1 (WO)
Title: Gat vector for mediating and regulating male fertility of plant recessive genic male sterile line, and application thereof
Inventor: LONG TUAN
IPC: C12N15/82
Filed: 2021-05-07
Abstract: Provided are a GAT vector for mediating and regulating male fertility of a plant recessive genic male sterile line, and an application thereof. The GAT vector comprises five functional element expression cassettes: a plant male fertility restoration gene element expression cassette, used for restoring the male fertility of a recessive genic sterile mutant; a plant pollen abortion gene element expression cassette, used for removing pollen containing GAT and maintaining the heterozygous state of a GAT maintainer line; a gene transformation and maintainer line selection element expression cassette, used for gene transformation and impurity removal and purification of a GAT maintainer line; a herbicide sensitive element expression cassette, used for removal of pollen and seed exudates of a herbicide sensitive GAT maintainer line, and impurity removal and purification of a GAT sterile line; and a seed selection element expression cassette, used for mechanical seed sorting. The GAT vector can be used for hybrid breeding and hybrid seed production of plant recessive genic sterile materials.
Patent WO-2021238725-A1 (WO)
Title: Screen assembly and electronic apparatus
Inventor: ZHU CHUANYI
IPC: H04M1/02
Filed: 2021-05-18
Abstract: The present application relates to the technical field of electronic apparatuses, and discloses a screen assembly and an electronic apparatus. The screen assembly comprises: a first screen and a second screen; a first slide rail and a second slide rail; a first magnetic component and a second magnetic component having opposite polarities, wherein the first magnetic component abuts the first slide rail, and the second magnetic component abuts the second slide rail; and a first drive device and a second drive device, wherein the first drive device drives the first magnetic component to rotate along the first slide rail, and the second drive device drives the second magnetic component to rotate along the second slide rail, such that the folding angle between the first screen and the second screen changes from a first angle to a second angle.
Patent WO-2022012155-A1 (WO)
Title: Robust iterative learning control method for series inverted pendulums in finite frequency range
Inventor: TAO HONGFENG
IPC: G05B13/04
Filed: 2021-05-20
Abstract: A robust iterative learning control method for series inverted pendulums in a finite frequency range, relating to the field of iterative learning control. The method comprises: establishing a state space equation of series inverted pendulums; converting a state space equation of original series inverted pendulums; designing a robust iterative learning control algorithm according to a repetitive process theory; analyzing the convergence of the robust iterative learning control algorithm in a finite frequency range; and solving for a control law gain of the robust iterative learning control algorithm. The provided algorithm ensures that a frequency domain of a system is stable, has a robust control performance, and ensures the convergence of an output error in time domain and frequency domain ranges in the presence of the external interference.
Patent WO-2022041869-A1 (WO)
Inventor: YIN WEIHUA
IPC: A61H3/06
Filed: 2021-05-21
Abstract: 一种路况提示方法、装置、电子设备、存储介质及程序产品，其中，路况提示方法包括：获取避障设备对应距离设定范围内的目标对象对应的对象属性信息，以及目标对象对应的距离信息（S101）；基于目标对象对应的对象属性信息和距离信息，确定目标对象的风险信息（S102）；基于确定的风险信息，通过避障设备进行路况提示（S103）。
Patent WO-2022041873-A1 (WO)
Inventor: PANG ZHENHUA
IPC: H05B45/10
Filed: 2021-05-21
Abstract: A display apparatus and a step power circuit, a feedback sampling point is arranged at an output portion of a filter circuit in the display apparatus, which allows indirect adjustment of the voltage of a variable voltage portion by means of sampling an output voltage of the filter circuit, accomplishing control of an LED drive voltage, which not only implements timely feedback to perform changing voltage adjustment when a changing voltage fluctuates, but also allows for timely feedback to perform changing voltage adjustment when a fixed voltage fluctuates, and effectively solves the problem of voltage instability; also, voltage instability caused by other rippling or noise introduced due to feedback sampling is prevented by means of the filter circuit filtering voltage rippling in an output voltage of a fixed voltage power supply in the display apparatus, solving the problem of voltage instability when a power supply circuit is supplying power.
Patent WO-2022188271-A1 (WO)
Inventor: LUO CAILIAN
IPC: E02D29/14
Filed: 2021-05-24
Abstract: 本发明涉及建筑技术领域，且公开了一种用于校区下水道井盖的保护装置，包括地面、下水井盖和凸起，所述下水井盖的内部开设有下水孔，所述下水井盖的内部活动连接有连接座，所述连接座的右侧活动连接有防护板，所述防护板的右侧活动连接有固定座，所述固定座的内部活动连接有磁块。该用于校区下水道井盖的保护装置，通过挤压凸起，挤压块向下移动，挤压块内部活动连接电介质板，电介质板向下移动，当正极板与负极板之间电流小于压敏电阻的最大通路电压，压敏电阻处于通路状态，电磁铁与压敏电阻电性连接，电磁铁通电与磁块相吸，防护板展开，防止脚被卡在下水孔内部出现危险，操作简单，自动化程度高，避免小朋友受到伤害，提高了安全性。