baber/WOPTO huggingface dataset:
Patent WO-2022262568-A1 (WO)
Inventor: MI JIANJUN
IPC: F02B37/00
Filed: 2022-05-31
Abstract: La présente invention concerne un procédé de suralimentation pour un moteur à combustion interne, le moteur à combustion interne (1) aspirant le gaz et évacuant le gaz lors du fonctionnement, le gaz d'admission et le gaz d'échappement étant raccordés par l'intermédiaire d'un tube d'aspiration (10), et le gaz d'admission étant entraîné, en utilisant l'énergie cinétique du gaz d'échappement et au moyen du tube d'aspiration (10), pour accélérer l'écoulement dans le moteur à combustion interne (1). La présente divulgation concerne également un appareil de suralimentation pour un moteur à combustion interne, comprenant un tube d'aspiration (10), une ouverture d'entrée de gaz du tube d'aspiration étant proche d'une ouverture de tube d'admission de gaz du moteur à combustion interne, et une ouverture de sortie de gaz du tube d'aspiration étant proche d'une ouverture de tube d'échappement de gaz du moteur à combustion interne ; l'entrée de gaz et la sortie de gaz du tube d'aspiration forment des structures de gaine de conduit avec un tube d'admission de gaz (5) et un tube d'échappement de gaz (2) du moteur à combustion interne, respectivement ; le gaz d'échappement du moteur à combustion interne (1) est évacué d'un conduit des gaines de conduit, entraîne l'accélération et l'écoulement de l'air dans l'autre conduit des gaines de conduit, est conduit par l'intermédiaire du tube d'aspiration (10), et entraîne l'écoulement de l'air dans le tube d'admission de gaz (5) du moteur à combustion interne dans le moteur à combustion interne (1) ; la pression d'admission de gaz du moteur à combustion interne (1) est augmentée sans consommation d'énergie supplémentaire ni composants rotatifs.
Patent WO-2023071190-A1 (WO)
Title: 一种活体检测方法、装置、计算机设备及存储介质
Inventor: HU YUXUAN
IPC: G06V40/40
Filed: 2022-05-31
Abstract: 一种活体检测方法、装置、计算机设备及存储介质，其中，该方法包括：响应活体检测请求，获取与目标动作对应的多帧待检测图像，其中，所述目标动作为进行活体检测时指示用户做出的动作（S101）；基于所述各帧待检测图像中与所述目标动作匹配的特征点位置信息，确定各帧待检测图像分别对应的用于表示所述目标动作完成情况的检测值（S102）；基于与所述目标动作匹配的检测方案对所述检测值进行检测，得到活体检测结果（S103）。
Patent WO-2023000923-A1 (WO)
Inventor: WANG XINHAO
IPC: B65G1/04
Filed: 2022-06-24
Abstract: 一种货架（100）、仓储装置（200）、控制方法、装置、设备及可读存储介质，其中，该货架（100）包括：沿货架（100）周向间隔设置的多根第一立柱（110）和多根第二立柱（120），在货架（100）的宽度方向上，第一立柱（110）位于两根第二立柱（120）之间；至少一个暂存层板（130），暂存层板（130）包括沿水平方向设置的第一横梁（131）、沿第一横梁（131）的两侧间隔设置的多个暂存构件（132），第一横梁（131）的两端分别设置于两根第一立柱（110），暂存构件（132）包括两个支撑臂（132A）以及在两个支撑臂（132A）之间形成的叉槽（132B），暂存层板（130）用于提供多个暂存位（133）；至少一个储存层板（140），通过第一立柱（110）和第二立柱（120）在竖直方向上与暂存层板（130）间隔设置，储存层板（140）用于提供多个储存位。
Patent WO-2024007303-A1 (WO)
Title: Communications sans fil utilisant un codage par réseau de blocs de code croisé basé sur des lots
Inventor: CAO YU
IPC: H03M13/05
Filed: 2022-07-08
Abstract: La présente divulgation concerne des blocs de code (CB) qui sont transmis par un dispositif de transmission et reçus par un dispositif de réception dans un réseau de communication sans fil. Les CB sont générés sur la base d'un lot de paquets de couche physique auxquels un sous-ensemble de paquets codés de couche supérieure sont mappés, et les paquets codés de couche supérieure sont générés à partir de paquets d'informations de couche supérieure. Des paquets des paquets d'informations de couche supérieure qui sont utilisés pour générer le sous-ensemble de paquets codés de couche supérieure pour le lot chevauchent des paquets des paquets d'informations de couche supérieure qui sont utilisés pour générer un sous-ensemble supplémentaire des paquets codés de couche supérieure pour un mappage à un autre lot de paquets de couche physique. Des blocs de contrôle sont également transmis et reçus, et chaque bloc de contrôle est généré sur la base de parties de multiples CB.
Patent WO-2023020527-A1 (WO)
Inventor: HUANG CHUNCHENG
IPC: H04N5/232
Filed: 2022-08-17
Abstract: The present application relates to the technical field of image processing, and disclosed are an image processing method and apparatus, an electronic device, and a readable storage medium. The method comprises: determining a first exposure parameter according to a photographing scene and brightness information of a target PD pixel in a focusing area of an image sensor; performing first exposure on a candidate PD pixel in the image sensor by using the first exposure parameter configured by a first control path to generate a first image, the candidate PD pixel being a pixel, used for phase focusing, in the image sensor, the candidate PD pixel comprising the target PD pixel, and the first exposure parameter being controlled by the first control path; and performing phase focusing on the photographing scene on the basis of the first image. A second exposure parameter of an imaging pixel in the image sensor is controlled by a second control path, the first control path is different from the second control path, and the image sensor is connected to both the first control path and the second control path.
Patent WO-2023040560-A1 (WO)
Title: 基于多模态医学影像的ffr确定方法、装置、设备及介质
Inventor: LI YINGGUANG
IPC: A61B5/00
Filed: 2022-08-17
Abstract: 一种基于多模态医学影像的FFR确定方法、装置、设备及介质，方法包括：获取包括感兴趣血管段的血管腔内影像（S210）；获取包括待检测血管段的血管外部影像，待检测血管段与感兴趣血管段至少部分重合（S220）；对血管腔内影像和血管外部影像进行配准，得到配准结果（S230）；利用配准结果，基于血管腔内影像和血管外部影像确定基于多模态医学影像的目标血流储备分数（S240）。FFR确定方法，通过利用血管腔内影像和血管外部影像的配准结果，整合血管腔内影像和血管外部影像的优势信息，来优化血流储备分数的计算，得到基于多模态医学影像的兼具血管段完整性与局部精确性的血流储备分数，提高了血流储备分数计算的准确度与稳定性。
Patent WO-2023025169-A1 (WO)
Inventor: MENG YUAN
IPC: C12N5/10
Filed: 2022-08-23
Abstract: L'invention concerne une protéine de liaison isolée contenant un domaine de liaison à l'antigène d'un ADN polymérase Taq, et la préparation et l'utilisation de la protéine de liaison. La protéine de liaison a une affinité élevée avec l'ADN polymérase Taq et peut être utilisée dans le domaine de la détection par PCR.
Patent WO-2024000774-A1 (WO)
Inventor: SHI YANG
IPC: H04R9/02
Filed: 2022-08-25
Abstract: The present invention provides a loudspeaker unit, comprising a frame, and a vibration system and a magnetic circuit system that are fixed on the frame. The vibration system comprises a diaphragm and a voice coil for driving the diaphragm to vibrate and produce sound. The loudspeaker unit further comprises a magnetic front cover which is fixed on the frame and is used for increasing the BL value of the voice coil. According to the loudspeaker unit of the present invention, the BL value of the voice coil is increased.
Patent WO-2023051564-A1 (WO)
Inventor: LIU SIQI
IPC: H04W24/02
Filed: 2022-09-28
Abstract: 本申请实施例公开了一种联合调度方法和设备，属于通信技术领域。本申请实施例的联合调度方法包括：终端确定第一调度对象和第一被调度对象组；所述终端在所述第一调度对象上监控联合控制信息；其中，所述第一调度对象至少支持调度所述第一被调度对象组，所述第一被调度对象组包括至少一个被调度对象，所述联合控制信息支持用于调度至少两个被调度对象。
Patent WO-2023221364-A1 (WO)
Inventor: JIN YU
IPC: G09G3/00
Filed: 2022-09-29
Abstract: A test circuit (100a), a display panel (100), and a display apparatus. The test circuit (100a) comprises: a substrate (10); a first wire layer (20), which is arranged on the substrate (10), wherein the first wire layer (20) comprises a first wire (21) that extends in a first direction; a second wire layer (30), which is located on the side of the first wire layer (20) that faces away from the substrate, the second wire layer (30) comprising a second wire (31) that extends in a second direction, wherein the second wire (31) comprises an overlapping section (311), and the orthographic projection of the overlapping section (311) on the substrate (10) at least partially overlaps with the orthographic projection of the first wire layer on the substrate; and a static-electricity release portion (40), which is arranged on at least one side of the overlapping section (311) in the second direction, the static-electricity release portion (40) being used for releasing static electricity from the second wire (31). In the test circuit (100a), the static-electricity release portion (40) is arranged on at least one side of the overlapping section (311) in the second direction, and the static-electricity release portion (40) can release the static electricity from the second wire (31), thereby ameliorating the problem of the static electricity being conducted to the overlapping section (311) to break down the first wire (21).
Patent WO-2023066128-A1 (WO)
Title: Power line communication method, main routing device, and apparatus
Inventor: Tao Shuangming
IPC: H04W72/04
Filed: 2022-10-13
Abstract: The present application is applicable to the field of communication control. Provided are a power line communication method, a main routing device, and an apparatus. In the method provided in the present application, a main routing device can acquire a device access state of a first sub-routing device. If the device access state of the first sub-routing device is a first state, this indicates that no user equipment accesses the first sub-routing device. At this time, the main routing device may not allocate a sending opportunity in a first time period of a transmission management cycle to the first sub-routing device, and may allocate a sending opportunity in a second time period of the transmission management cycle to the first sub-routing device, thereby reducing sending opportunities of the first sub-routing device, preventing the first sub-routing device from excessively wasting time slots, and improving the bandwidth utilization rate of a power line network, thus having relatively strong practicability and usability.
Patent WO-2023066369-A1 (WO)
Title: Module power-on test device for electricity meter based on internet of things
Inventor: CHEN YAN
IPC: G01R35/04
Filed: 2022-10-21
Abstract: A module power-on test device for an electricity meter based on the Internet of Things, the device comprising a base (1), pins (13), a lifting device and a limiting device. Insertion holes in a surface of a module (35) to be tested correspondingly match the pins (13), and the positions of the pins (13) are fixedly designed. During the process of manually plugging and unplugging said module (35) to bring same into contact with the pins (13), it is very easy to misalign the pins (13) with the insertion holes in the surface of said module (35); moreover, the pins (13) are very prone to becoming crooked during the process of manual plugging and unplugging, which seriously affects testing efficiency. Providing the limiting device at the top of the lifting device, and placing and fixing said module (35) in the limiting device by using the limiting device can effectively improve the accuracy of the contact between the pins (13) and the insertion holes in the surface of said module (35), and avoid the misalignment of the pins (13) during the process of plugging and unplugging. Furthermore, the probability of the pins (13) becoming crooked during the process of plugging and unplugging can be effectively reduced, and therefore the testing efficiency can be effectively improved.
Patent WO-2023185018-A1 (WO)
Inventor: LIU JIE
IPC: H04W28/02
Filed: 2022-11-22
Abstract: The present application relates to the technical field of communications, and in particular to a communication control method, a communication device and a medium. In the method, the largest RB, which can be currently allocated by a base station under test, is allocated to a terminal device in communication with said base station, such that the terminal device can transmit data to said base station at a network transmission rate corresponding to the largest RB; by means of monitoring the network transmission rate of a MAC layer of said base station, whether an event of transmitting data at the maximum network transmission rate occurs is determined; and if the event of transmitting data at the maximum network transmission rate occurs in said base station, it indicates that a network transmission function of said base station is normal. In the communication control method in the present application, only the network transmission rate of a MAC layer of a base station under test needs to be measured, and no transmission network, core network or remote control device is involved, therefore the risk of a transmission network, a core network, etc., being under a network attack can be greatly reduced, thereby improving the network security during a test process of a base station.
Patent WO-2023134391-A1 (WO)
Title: System for evaluating quality of stem cells
Inventor: KANG YUJIAN JAMES
IPC: G16B30/00
Filed: 2022-12-16
Abstract: The present disclosure provides a system for evaluating the quality of stem cells, comprising: a quality scoring module, used for calculating the quality score of the stem cells based on the expression level of feature genes related with the quality of stem cells and weight coefficient of the feature genes; a quality evaluation module, used for evaluating the quality of the stem cells based on the quality score of the stem cells; and a result output module, used for outputting a result report of the quality of the stem cells; further comprising: a subpopulation clustering module, used for obtaining single-cell gene expression data and specific quality attributes of the stem cells; a subpopulation identification module, used for determining a quality predictive model of the stem cells, the feature genes related with the quality of stem cells, and weight coefficient of the feature genes based on the single-cell gene expression data and the specific quality attributes of the stem cells. The present disclosure achieves the effect of accurately and quantitatively evaluating the quality of stem cells, and the system can be used for screening the stem cells with high quality.
Patent WO-2023179151-A1 (WO)
Inventor: Sun Huasen
IPC: B62D33/04
Filed: 2022-12-29
Abstract: 一种用于车厢分层的保温厢板，包括金属材料制成的导轨(1)和非金属材料制成的板体(2)，所述板体(2)包括相对设置的外侧板(21)和内侧板(22)，所述内侧板(22)上设有竖向设置的条形凹槽(23)，所述导轨(1)固定设置在条形凹槽(23)内，所述条形凹槽(23)的顶部和底部分别设有非金属材料制成的隔热件(3)，所述隔热件(3)通过紧固件(5)固连在板体(2)上，所述导轨(1)的上端与条形凹槽(23)顶部的隔热件(3)以及导轨(1)的下端与条形凹槽(23)底部的隔热件(3)均通过插接结构连接。所述保温厢板具有保温隔热性能好、导轨安装稳定的优点。
Patent WO-2023216621-A1 (WO)
Inventor: LI YONG
IPC: G06F9/451
Filed: 2022-12-29
Abstract: 本申请实施例公开了一种云桌面的图像处理方法、装置、服务器和存储介质，属于互联网技术领域。所述方法包括：将云桌面的图像数据存储至共享纹理，所述共享纹理是具有共享属性的纹理；对所述共享纹理中存储的图像数据进行编码处理，得到编码处理后的图像数据；将所述编码处理后的图像数据发送至所述终端。本申请在获取到云桌面的图像数据后，将图像数据存储到了不同的线程均可访问的共享纹理中，可以直接对共享纹理中存储的图像数据进行编码处理。这样云桌面的图像数据无需在内存和显存之间进行多次传输。可见，本申请能够提高对图像数据进行编码处理的效率，可降低终端获取云桌面的图像数据的时延。
Patent WO-2023134516-A1 (WO)
Title: Broadcast communication method and apparatus
Inventor: LI MENG
IPC: H04W72/00
Filed: 2023-01-04
Abstract: Embodiments of the present application provide a broadcast communication method and apparatus. An identifier of a first broadcast service is sent to a radio access network device, so that the radio access network device may identify the same first broadcast service in different networks. The radio access network device may send data of the broadcast service in a first network by means of resources that have been allocated to the first broadcast service in a second network. In other words, in the present application, the radio access network device may share air interface resources for the same broadcast service in different networks, thereby saving transmission resources of the radio access network device and avoiding waste of air interface resources.
Patent WO-2023134614-A1 (WO)
Title: 事务的处理
Inventor: YANG ZHENKUN
IPC: G06F16/27
Filed: 2023-01-09
Abstract: 一种处理事务的方法和装置，方法包括：接收第一事务，第一事务为非只读事务，第一事务包括第一数据库语句和第二数据库语句，第一数据库语句和第二数据库语句分别用于对分布式数据库中的第一数据库节点和第二数据库节点进行操作；与第一数据库节点建立第一数据库连接；通过第一数据库连接向第一数据库节点发送第一数据库语句；与第二数据库节点建立第二数据库连接；通过第二数据库连接向第二数据库节点发送第二数据库语句；接收第一数据库节点针对第一数据库语句的反馈信息，反馈信息包括第一事务的控制信息；向第二数据库语句对应的数据库节点发送控制信息。
Patent WO-2023213131-A1 (WO)
Inventor: WEI LICHUAN
IPC: H05K7/20
Filed: 2023-03-07
Abstract: 本申请实施例公开了一种冷却装置，包括箱体、发泡装置以及循环装置，箱体的内部具有冷却腔，冷却腔内盛有冷却液体以对发热物体进行冷却；发泡装置的部分结构浸没于冷却液体内，且能够生成气泡，气泡能够在冷却液体内部上升至贴合发热物体需要冷却的表面；循环装置与箱体连接，用于将汽化后的冷却液体收集冷凝后重新输送至冷却腔内。通过设置发泡装置，产生气泡群冲刷发热元件表面，使得气泡能够替代汽化核心，加速发热元件附近液体的蒸发，可以降低发热元件表面过热度，而且气泡群可以辅助汽化核心在发热元件表面的脱离，提升换热能力上限，阻止或延缓膜态沸腾发生，提高临界热流密度，进而提升设备相变换热冷却能力，满足高强度散热需求。
Patent WO-2023221724-A1 (WO)
Inventor: WU SUWEN
IPC: H04L25/00
Filed: 2023-04-19
Abstract: 本申请提供了一种基带处理的方法和装置，方法包括：第一装置接收来自射频装置的第一功能信息和第一功耗信息，第一功能信息指示射频装置支持的第一基带处理功能，第一功耗信息指示第一基带处理功能的功耗；第一装置向射频装置发送第一指示信息，第一指示信息指示第一目标基带处理功能，第一指示信息是根据第一功能信息、第一功耗信息、第二功能信息和第二功耗信息确定的，第二功能信息指示第一控制装置支持的第二基带处理功能，第二功耗信息指示第二基带处理功能的功耗，其中，第一目标基带处理功能为N个需求基带处理功能中的前M个或后K个，需求基带处理功能为对基带信号进行处理过程中依次执行的基带处理功能，能够降低系统功耗。
Patent WO-2023207994-A1 (WO)
Inventor: SHI QUAN
IPC: H10K59/00
Filed: 2023-04-25
Abstract: A display panel, a manufacturing method therefor, and a display apparatus. The display panel (100) comprises a light-emitting device layer (110), an encapsulation layer (120) and an optical regulation layer (130), which are successively stacked, the optical regulation layer (130) comprising first lens structures (131) located on the side of the encapsulation layer away from the light-emitting device layer, and a planarization layer (132) located on the sides of the first lens structures away from the light-emitting device layer, and on the exposed side of the encapsulation layer away from the light-emitting device layer, the surfaces of the sides of at least part of the first lens structures (131) away from the light-emitting device layer (110) having relief appearances.
Patent WO-2023226737-A1 (WO)
Inventor: DING YE
IPC: B65G15/60
Filed: 2023-05-08
Abstract: 本发明公开了一种具有清扫清洁功能的皮带机下托辊装置，包括下托辊组件以及设于所述下托辊组件一侧的清扫辊刷组件，所述清扫辊刷组件与所述下托辊组件相配合；所述下托辊组件包括下托辊，所述下托辊沿皮带机的回程皮带的运行方向设置，所述下托辊的表面设置为菱形网格状；所述清扫辊刷组件包括辊刷轴以及设于所述辊刷轴上的辊刷，所述辊刷轴平行设于所述下托辊的下方，所述辊刷与所述下托辊的表面相配合。本发明还公开了一种包含皮带机下托辊装置的皮带机。本发明使得下托辊在支撑回程皮带的同时起到清扫清洁作用，避免了传统的清扫机构与皮带间的直接接触，减少了皮带机表面的磨损情况。
Patent WO-2023226780-A1 (WO)
Inventor: LIU HONGFEI
IPC: F01N13/08
Filed: 2023-05-11
Abstract: The present invention relates to the field of vehicles. Disclosed is a carbon deposit self-cleaning type exhaust pipe, comprising an exhaust pipe, a fixing frame, a cleaning device, an internal magnetic assembly, a driving device, and an external magnetic assembly; the fixing frame is fixedly connected to the exhaust pipe, and a sliding shaft is fixedly connected to the center of the fixing frame; an internal support frame is fixedly connected to the right end of the sliding shaft, the cleaning device is slidably connected to the sliding shaft, and the driving device is provided on the outer side of the fixing frame and the outer side of the exhaust pipe; when a rotating cylinder rotates, by means of an acting force of a groove against a roller, the external magnetic assembly reciprocates on the outer side of the exhaust pipe to drive an internal impeller to move on the sliding shaft. The problem of hard-to-clean areas caused by fixed position of an internal impeller is solved, and the problems of reduced space of exhaust pipes and unsmooth exhaust discharge caused by provision of a plurality of cleaning devices are also avoided; an air flow is used as a driving force for rotation of both brush strips and the rotating cylinder, and there is no need to additionally provide an actuator and a sensor, so that carbon deposit cleaning work for the exhaust pipe is more stable and reliable.
Patent WO-2023241363-A1 (WO)
Title: Communication protection method and system, electronic device, and storage medium
Inventor: YAN XINCHENG
IPC: H04L9/40
Filed: 2023-05-31
Abstract: Embodiments of the present application relate to the technical field of communications. Disclosed are a communication protection method and system, an electronic device, and a storage medium. The method comprises: determining the type of a data packet to be sent, wherein the type of the data packet comprises a data packet I and a data packet II; the data packet I is the first data packet sent to a communication receiving end, and the data packet II is a non-first data packet sent to the communication receiving end; when the data packet is the data packet I, performing strong verification on the data packet; when the data packet is the data packet II, performing weak verification on the data packet, wherein the strong verification is verification having stronger security than the weak verification; and when the verification is passed, sending the data packet to the communication receiving end.
Patent WO-2023241376-A1 (WO)
Title: Video bitrate allocation method, system and device, and storage medium
Inventor: LIU MANMAN
IPC: H04N21/2187
Filed: 2023-06-01
Abstract: Disclosed in the embodiments of the present application are a video bitrate allocation method, system and device, and a storage medium. In the technical solution provided in the embodiments of the present application, a method comprising: by testing each specified target of a video frame to be encoded, determining an ROI of and a non-ROI of said video frame on the basis of the specified targets, and determining a saliency value of each macro block in said video frame, each specified target comprising a macro block of a specified classification; determining estimated bitrates of the ROI and of the non-ROI, and determining a saliency difference matrix of the macro blocks on the basis of the saliency values and a set saliency threshold; and then, on the basis of an association relationship amongst an offset matrix of the macro blocks, the estimated bitrates and the saliency difference matrix, determining the offset matrix, and configuring the bitrate of each macro block on the basis of the offset matrix, the offset matrix comprising a quantization parameter offset of each macro block. The technical means can be used for reducing a bitrate allocation error, improving bitrate allocation precision, and optimizing the livestream watching experience of a user.
Patent WO-2023237112-A1 (WO)
Inventor: ZHANG TING
IPC: C12M1/26
Filed: 2023-06-09
Abstract: A centrifugal impact-based bioaerosol enrichment device, and cell exposure and use thereof. The device comprises a bioaerosol enrichment device main unit and a cell exposure system; air sequentially passes through an enrichment chamber, a balance pool, and an exposure module of the enrichment device main unit; the cell exposure system acquires and adjusts exposure data of bioaerosols in the air in real time; a magnetic levitation mechanism drives a cell exposure membrane box to rotate. The steps of real-time acquisition, intelligent adjustment, dynamic control and exposure are sequentially carried out to perform air bioaerosol enrichment and dynamic monitoring of cell exposure toxicity.
Patent WO-2024002002-A1 (WO)
Inventor: LIN ZHENYE
IPC: H01R13/02
Filed: 2023-06-26
Abstract: Provided in the present application are a connector receptacle, a connector assembly and an electronic device. The connector receptacle comprises: a plurality of conductive terminals, each conductive terminal comprising a power supply terminal, and two power supply terminals which are oppositely arranged in the thickness direction of the connector receptacle forming a power supply terminal group. The two contact surfaces opposite to each other of at least one of the power supply terminal groups are arranged in an attached and communicating mode, and/or, at least one of the power supply terminal groups is integrally formed on a printed circuit board, and the two power supply terminals in the power supply terminal group are in electrical conduction by means of a connection member of the printed circuit board.
Patent CO-2017012568-A1 (CO)
Title: Bebedero automático para iniciación de pollitos
Inventor: OROZCO OSORIO EDGAR
IPC: A01K39/012
Filed: 2017-12-06
Abstract: La presente invención proporciona un bebedero automático para aves que suministra automáticamente agua a las aves desde el primer día hasta cualquier edad de las aves. El bebedero automático comprende principalmente un plato circular que lleva en el centro una cavidad con una abertura que une el espacio de la cavidad con el anillo o canal del plato y una cubierta protectora.