baber/WOPTO huggingface dataset:
Patent WO-2021128814-A1 (WO)
Inventor: ZHENG YUYING
IPC: B01J23/34
Filed: 2020-07-10
Abstract: A method for preparing a highly-efficient denitration anti-sulfur catalyst-loaded nitrogen-doped grid macromolecule-based composite material, comprising: first, by means of adding metal salts, aggregating a large number of Ce 3+ , Ce 4+ , Sn 3+  and Sn 4+  ions around cyanuric acid molecules; then, adding 2,4,6-triaminopyrimidine and cytosine, and enabling same to have a grafting reaction with cyanuric acid, so as to generate N-doped macromolecules in a first stage; then, using potassium permanganate as an oxidant, and carrying out an oxidation-reduction reaction on the surface of the N-doped macromolecules, so that a manganese-cerium-tin catalyst is grown in situ on the surface of the N-doped macromolecules; and finally, performing calcination once, such that the N-doped macromolecules are cross-linked, and finally a composite material having a denitration anti-sulphur catalyst grown in situ on N-doped grid macromolecules is generated. The composite material has higher denitration anti-sulfur properties.
Patent WO-2021227258-A1 (WO)
Title: Personalized abutment
Inventor: ZENG BIN
IPC: A61C8/00
Filed: 2020-07-24
Abstract: A personalized abutment, comprising a body. The body comprises a buccal side, a lingual side, a mesial side, and a distal side; the body comprises a transgingival area (200); the transgingival area (200) is columnar; the bottom (210) of the transgingival area (200) is round, and the top (220) of the transgingival area (200) is a hyperbolic paraboloid; the height of a buccal side end point (221) of the hyperbolic paraboloid is 0.5 to 6.5 mm, the height of a lingual side end point (222) of the hyperbolic paraboloid is 1 to 7 mm and is greater than the height of the buccal side end point (221), and the mesial side end point (223) and the distal side end point (224) of the hyperbolic paraboloid have the same height and are 0 to 1 mm higher than the lingual side end point (222). By the hyperbolic paraboloid design of the top (220) of the transgingival area (200), on one hand, perfect shaping of the implant cuff can be achieved so as to achieve ideal anatomic shape restoration, facilitating self-cleaning and cleaning of the prosthesis edge; and on the other hand, reasonable transmission and distribution of occlusal stress is facilitated.
Patent WO-2021032033-A1 (WO)
Inventor: LIAN LEI
IPC: C07D237/14
Filed: 2020-08-15
Abstract: 本发明属于农药技术领域，具体涉及一种哒嗪醇类化合物及其衍生物、制备方法、除草组合物和应用。所述哒嗪醇类化合物如通式（I）所示；其中，X代表式（II），该环为含有1-位碳原子的未取代或取代的芳基或杂环基；Y代表卤代烷基；Z代表卤素，氰基，羟基等；所述衍生物是指农业上可接受的通式I中哒嗪环4位上的羟基衍生物，包括盐、酯、肟、羟胺和醚类等衍生物。所述化合物及其衍生物、组合物具有优良的除草活性及作物安全性。
Patent WO-2021109641-A1 (WO)
Inventor: SU BIN
IPC: H02H7/04
Filed: 2020-08-28
Abstract: Provided are a transformer short-circuit protection circuit and a television. The transformer short-circuit protection circuit comprises a detection sub-circuit and a switch sub-circuit, wherein a first detection end of the detection sub-circuit is connected to a first end of a secondary coil of a first transformer, a second detection end of the detection sub-circuit is connected to a second end of a secondary coil of a second transformer that is connected to the first transformer in parallel, an output end of the detection sub-circuit is connected to an input end of the switch sub-circuit, and an output end of the switch sub-circuit is connected to a power supply circuit; the detection sub-circuit is used for switching on the switch sub-circuit when it is detected that either one of the first transformer and the second transformer, which are connected, is short-circuited; and the switch sub-circuit is used for outputting a high-level signal to the power supply circuit after being switched on, so as to switch off a power supply source in the power supply circuit.
Patent WO-2021135381-A1 (WO)
Title: Weaving process for three-dimensional jacquard fabric and three-dimensional jacquard fabric thereof
Inventor: YU YANG
IPC: D03D15/267
Filed: 2020-09-11
Abstract: A weaving process for a three-dimensional jacquard fabric and a three-dimensional jacquard fabric, the process comprising the following steps: designing a three-dimensional effect pattern that must be obtained from weaving, said three-dimensional effect pattern being a square continuous pattern; selecting the smallest unit pattern in the square continuous pattern; determining, on the basis of the smallest unit pattern, the number of heald frames, a means for threading yarn, and a means for lifting a heald; and repeatedly weaving warps and wefts that are made from a chemical fiber material to form a fabric. The fabric can present a three-dimensional effect and be pleasing to the eye and can be weaved by using a traditional two-dimensional loom without requiring new special equipment, thus costs are low. The fabric is high-strength and durable and is widely applicable to wall reinforcement for buildings, structural member production, industrial production and products for daily use.
Patent WO-2021098351-A1 (WO)
Inventor: SHEN LEI
IPC: G01B7/24
Filed: 2020-09-11
Abstract: A strain gauge, comprising a substrate (1); a transverse sensitive grid (13) disposed on the substrate (1); and at least two non-transverse sensitive grids (11, 12) that are each disposed on the substrate (1), that are located at two sides of the transverse sensitive grid (13) respectively, and that are each electrically connected to the transverse sensitive grid (13), wherein the two non-transverse sensitive grids (11, 12) are connected by means of a transverse connecting line (210) and share one grounding lead (115) and a grounding port (113), one end of the grounding lead (115) is connected to the connecting line (210) at the middle position of the connecting line (210), and the other end of the grounding lead (115) is connected to the grounding port (113); and the two non-transverse sensitive grids (11, 12) have the same resistance and are each respective connected to one end of each of two non-grounding leads (114, 124) that the same resistance, and the two non-grounding leads (114, 124) are connected to two non-grounding ports (122, 112) at the other end, respectively. The strain gauge has relatively high accuracy, reaches a stable state faster after being connected to a circuit, and has stronger anti-interference capabilities. Further provided are a pressure sensor and an interventional medical catheter.
Patent WO-2021057849-A1 (WO)
Title: Inductor quality factor measurement method, corresponding measurement circuit and application thereof
Inventor: GU LIJUAN
IPC: G01R27/26
Filed: 2020-09-24
Abstract: The present application relates to an inductor quality factor measurement method, a corresponding measurement circuit and an application thereof. One step voltage is given to an oscillating circuit to cause the oscillating circuit to perform underdamped oscillation, a value of a backup inductor quality factor Q i  may be calculated by means of performing simple elementary arithmetic on formula (I) or formula (II), and then a value of an inductor quality factor Q in the oscillating circuit may be determined by means of averaging the obtained values of several backup inductor quality factors Q i . The inductor quality factor measurement method, the corresponding measurement circuit and the application thereof of the present invention are used to measure voltage parameters at several points during testing, and then a value of a quality factor Q of an inductor in an oscillating circuit may be obtained by means of simple elementary arithmetic, thus the requirements on the circuit are lower, measurement costs are effectively saved, and the measurement process is also simpler.
Patent WO-2022082761-A1 (WO)
Inventor: WANG NINI
IPC: G02B13/00
Filed: 2020-10-23
Abstract: An optical system, a lens module, and an electronic device; the optical system comprises in sequence along the direction of the optical axis from the object side to the image side: a first lens (L1) having a positive refractive power, the object side (S1) being convex at the paraxial region; a second lens (L2) having a refractive power; a third lens (L3) having a refractive power; a fourth lens (L4) having a refractive power; a fifth lens (L5) having a refractive power; a sixth lens (L6) having a positive refractive power; and a seventh lens (L7) having a negative refractive power, the image side (S12) being convex at the paraxial region; the optical system satisfies the condition: 4≤(Y72*TL))/(ET7*f)≤10, wherein Y72 is the maximum optical effective radius of the image side (S12) of the seventh lens (L7), TL is the distance on the optical axis from the object side (S1) of the first lens to the optical system imaging plane (S17), ET7 is the distance on the optical axis from the object side (S11) of the seventh lens (L7) at the maximum optical effective diameter to the image side (S12) of the seventh lens (L7) at the maximum optical effective diameter, and f is the focal length of the optical system. The present optical system can meet the requirements for wide-angle photography and miniaturisation.
Patent WO-2021103900-A1 (WO)
Title: 窗式空调器的密封组件以及具有其的窗式空调器
Inventor: XING ZHIGANG
IPC: F24F1/031
Filed: 2020-10-27
Abstract: 一种窗式空调器(200)的密封组件(100)以及具有其的窗式空调器(200)，窗式空调器(200)适于支撑在墙体(300)的窗口(310)上，窗口(310)内设有可移动的窗扇(400)，窗式空调器(200)包括机壳(210)，机壳(210)设有容纳槽(211)，窗扇(400)的至少一部分适于伸入到容纳槽(211)内，密封组件(100)适于分别与窗扇(400)和窗口(310)的内壁接触，且包括固定部件(1)和密封部件(2)，固定部件(1)连接于机壳(210)上，密封部件(2)连接于固定部件(1)，密封部件(2)适于密封设置在窗扇(400)和窗口(310)的内壁之间。
Patent WO-2021083186-A1 (WO)
Inventor: GUAN AIYING
IPC: C07D495/04
Filed: 2020-10-28
Abstract: 本发明公开了一种含稠环嘧啶的哌啶胺类化合物，结构如通式L所示：式中各取代基的定义见说明书。本发明的化合物具有广谱的杀菌活性，对黄瓜霜霉病、小麦白粉病、玉米锈病、黄瓜炭疽病等具有优良的防治效果。本发明的化合物同时表现出很好的杀虫杀螨活性，对小菜蛾、粘虫、朱砂叶螨等具有优良的防治效果。
Patent WO-2022099504-A1 (WO)
Inventor: WANG XINGHONG
IPC: C12M1/00
Filed: 2020-11-11
Abstract: Provided are a liquid adding method for sampling and drawing a reagent, and a liquid path system therefor. The method comprises: a sampling needle of a liquid path system moving to a specified position of a reagent bottle; by means of a pull-down stroke of a fourth injector, acquiring a reagent in the reagent bottle, and enabling the sampling needle and a communication pipe connected between the sampling needle and a third injector to be filled with the reagent; the sampling needle ascending, and a first injector or a second injector drawing a diluent and then discharging the diluent into a swab arranged on the outer side of the sampling needle for recycling; the sampling needle moving into a reaction tank, and discharging the reagent into the reaction tank by means of a push-up stroke of the fourth injector; and acquiring the diluent via the first injector or the second injector or the fourth injector, and discharging the diluent into the sampling needle and the communication pipe by means of the interior of the third injector until the diluent is converged in the swab for recycling. The liquid path system comprises a first injector, a third injector, a fourth injector, a sampling needle, a swab arranged on the outer side of the sampling needle, a reagent bottle which contains a reagent, a dilution device which contains a diluent, a reaction tank, a connection pipe, a first three-way electromagnetic valve, a second three-way electromagnetic valve, a third three-way electromagnetic valve, a fourth three-way electromagnetic valve, a fifth three-way electromagnetic valve, a first joint and a second joint. By using the method in the present application, it can be ensured that a reagent is not wasted, added liquids are not contaminated, liquid adding is rapid, efficient and precise, uniform mixing is sufficient, the efficiency is improved, and the market competitiveness is improved.
Patent WO-2021098589-A1 (WO)
Inventor: XUE YUEGE
IPC: H01R4/48
Filed: 2020-11-13
Abstract: A band (200), the band (200) comprising a band body (210) and a conductive layer (220). One end of the band body (210) can be used for connecting to an electronic device (100). The conductive layer (220) is provided on the surface of the band body (210), and when the band body (210) is connected to the electronic device (100), the conductive layer (220) is electrically connected to the electronic device (100). The band (200) enables the electronic device (100) to be worn on the body of a user, so that the conductive layer (220) is electrically connected to the body of the user, and the electronic device (100) can measure the user's electrocardiogram by means of the conductive layer (220).
Patent WO-2022133823-A1 (WO)
Title: Antenna circuit, communication chip, terminal device, and feedback tuning method
Inventor: YUAN GUANGKAI
IPC: H04B1/40
Filed: 2020-12-23
Abstract: Provided in the present application are an antenna circuit, a communication chip, a terminal device, and a feedback tuning method. The antenna circuit comprises: a filter circuit, a matching circuit, an antenna network circuit, and a feedback circuit. The filter circuit is used to filter an input voltage. The matching circuit is used to match an output of the filter circuit and an input of the antenna network circuit. The feedback circuit is connected to the matching circuit by means of a connection node in the matching circuit. The feedback circuit is used to adjust an amplification factor of the feedback circuit according to the voltage of the connection node, so that the voltage of the connection node is the maximum value. In the present application, by means of adjusting the amplification factor, the overall equivalent capacitance value in the antenna circuit can be adjusted equivalently to then change the resonant frequency of the antenna circuit, so that the antenna circuit is in a resonant state, thereby ensuring the communication quality and improving the communication stability and reliability. In addition, the cost of the antenna circuit can also be reduced.
Patent WO-2021136514-A1 (WO)
Inventor: QIU WEIHUA
IPC: A24F40/40
Filed: 2020-12-31
Abstract: 一种雾化器（100），其包括储液件（10）和雾化组件（20），储液件（10）上设置有用于存储气溶胶形成基质的储液腔（101），雾化组件（20）与储液件（10）滑动连接，雾化组件（20）包括用于加热气溶胶形成基质的发热结构（21），雾化组件（20）上开设有进液口（202），进液口（202）上安装有密封件（30），储液件（10）内相对储液件（10）固定设置有顶杆（40），顶杆（40）与密封件（30）连接，相对储液件（10）滑动雾化组件（20），可使雾化组件（20）于第一位置和第二位置之间活动，当雾化组件（20）处于第一位置时，密封件（30）关闭进液口（202），当雾化组件（20）处于第二位置时，密封件（30）脱离进液口（202），气溶胶形成基质通过进液口（202）后与发热结构（21）接触。在该雾化器（100）中，气溶胶形成基质与发热结构（21）可相互隔离，避免了泄漏及变质。还公开了一种带有该雾化器（100）的气溶胶发生装置。
Patent WO-2021143600-A1 (WO)
Title: Wireless data terminal and wireless data terminal control system
Inventor: CHENG LIANGJUN
IPC: H01Q1/52
Filed: 2021-01-06
Abstract: The present application provides a wireless data terminal and a wireless data terminal control system. The wireless data terminal comprises a housing, a drive component, a first antenna component, and a second antenna component. The drive component can drive the first antenna component and the second antenna component to extend and retract in different directions between a first position and a second position. When the wireless data terminal does not need to be used or a large isolation is not required between antennas, the drive component can drive the antenna components to retract to the first position, which can reduce the size of the volume occupied by the wireless data terminal while meeting the requirement for the antenna isolation. When a large isolation is required between the antennas, the drive component can drive the antenna components to extend to the second position, which increases the isolation between the antennas.
Patent WO-2021139714-A1 (WO)
Inventor: HE DONGDONG
IPC: H04L12/437
Filed: 2021-01-07
Abstract: 本申请实施例提供数据传输方法、设备及系统，可应用于涉及车辆驾驶的系统，比如自动驾驶系统或车联网(vehicle to everything，V2X)系统，具体的，可应用于以太环网中的通信设备。该方法中，通信设备通过该通信设备的第一环网接口接收第一报文，第一报文中包括第一字段，第一字段的值为第一数值或第二数值，第一数值用于指示不允许环网接口向业务接口发送第一字段所在的报文，第二数值用于指示允许环网接口向业务接口发送第一字段所在的报文；之后，该通信设备根据第一字段的值发送第一报文。基于该方案，可以避免通信设备的业务接口连接的设备重复接收组播报文，降低对业务的影响。
Patent WO-2022147801-A1 (WO)
Inventor: YOU CHUNHUA
IPC: H04W80/00
Filed: 2021-01-08
Abstract: Disclosed in the embodiments of the present application are a data processing method and apparatus. In the method, when a first condition is met, a sending terminal performs first cascade processing on multiple items of data to acquire first data, and sends the first data. The multiple items of data belong to one data radio bearer DRB of the sending terminal. The first condition comprises one or more of the following: a timer expiring, the timer being used for controlling the first cascade processing, and the timer being started after the cascade processing prior to the first cascade processing is completed; the number of the multiple items of data being greater than or equal to a first threshold, the first threshold being greater than or equal to 2; and the bit size of the multiple items of data being greater than or equal to a second threshold, the second threshold being greater than or equal to 2. The embodiments of the present application facilitate the sending terminal directly processing the first data when the first data is transmitted to other protocol layers, rather than respectively processing each item of data amongst the multiple items of data, thereby reducing the complexity of the sending terminal processing the data.
Patent WO-2021147696-A1 (WO)
Title: Display substrate, display panel and display device
Inventor: HAN YING
IPC: G06K9/00
Filed: 2021-01-11
Abstract: The present disclosure provides a display substrate, a display panel and a display device. The display substrate comprises a base substrate, a plurality of sub-pixels located on the base substrate, a plurality of driving circuits and a plurality of light sensors, the orthographic projection of each light sensor on the base substrate being located within the range of the orthographic projection of the corresponding driving circuit on the base substrate.
Patent WO-2022151359-A1 (WO)
Inventor: LIAO ZHUOWEN
IPC: H02J7/00
Filed: 2021-01-15
Abstract: A stand, comprising a seat (10), a charging support (20), and an electrical connection assembly. The seat (10) comprises a seat body, a storage groove (104) for accommodating the charging support (20) is formed on the seat body (11), an electrical connection mechanism comprises a control assembly and a charging assembly, and the control assembly is connected to the seat body (11); the charging support (20) has a plugging position allowing for plugging into the control assembly, and at the plugging position, the charging support (20) can support a mobile terminal, and the control assembly can control the charging assembly to charge the mobile terminal abutting against the charging support (20). When the stand is not in use, plugging between the charging support (20) and the control assembly can be eliminated, and the charging support (20) is placed in the storage groove (104), thereby saving the space occupied by the stand; in addition, it is convenient to carry, and the loss of the charging support (20) is avoided.
Patent WO-2022088550-A1 (WO)
Title: Reagent for detecting concentration of lipoprotein particles and use method of reagent
Inventor: ZOU BINGDE
IPC: G01N15/06
Filed: 2021-02-04
Abstract: A reagent for detecting concentration of lipoprotein particles. The reagent is composed of the following components: a diluent, a density solution, and a buffer solution, the density solution contains an alcohol substance, and the concentration of the alcohol substance is 0.1%-50%. The invention relates to the field of in vitro diagnosis. The present reagent not only can be used for independently detecting the concentration of the lipoprotein particles, but also can be used in combination with other instrument reagents for detecting subcomponents of lipoprotein cholesterol at the same time without detection in two times, so that the time and the cost are saved.
Patent WO-2021164709-A1 (WO)
Inventor: WANG KAI
IPC: C12Q1/6886
Filed: 2021-02-18
Abstract: 提供了一种用于预测实体瘤对象对免疫检查点抑制剂疗法敏感性的检测剂和包含所述检测剂的试剂盒，所述检测剂为用于检测NOTCH基因变异的检测剂；所述NOTCH基因选自NOTCH1、NOTCH2、NOTCH3、NOTCH4中的至少一种；所述免疫检查点抑制剂为PD1抑制剂和/或PD-L1抑制剂。
Patent WO-2021175239-A1 (WO)
Title: 一种多血型系统自动检测卡及检测方法
Inventor: LUO YANG
IPC: G01N33/80
Filed: 2021-03-03
Abstract: 一种多血型系统自动检测卡及检测方法。多血型系统自动检测卡由上而下包括加样层、反应层、显色层、识别层四部分，在加样层上开设加样孔（1），反应层上设有全血垫（3）或从全血中过滤红细胞的过滤垫（2），加样孔（1）的底部与全血垫（3）或过滤垫（2）相连，全血垫（3）的末端与若干个预包被血型抗体的抗体垫（4）相连，过滤垫（2）的末端通过延时垫（5）与预包被血型抗原的抗原垫（6）相连；反应层单独设置质控条带；显色层上设有若干个与抗体垫（4）或抗原垫（6）末端相连的显色区；识别层反向与显色层相连。该多血型系统自动检测卡及检测方法将血型检测与编码技术结合，可快速检测多种血型，实现多种血型自动识别，减少人工判断误差，提高检测效率，无需专用设备，实现血型快速、准确、自动化、便携式检测。
Patent WO-2021203883-A1 (WO)
Inventor: WANG JIANGFENG
IPC: G01B11/25
Filed: 2021-03-05
Abstract: 一种三维扫描方法、三维扫描系统、计算机设备和计算机可读存储介质。该三维扫描方法包括：采集被扫描对象的三维点面信息，并在采集三维点面信息时跟踪三维扫描仪(11)的第一位姿；以及采集被扫描对象表面的色彩纹理信息，并在采集色彩纹理信息时跟踪三维扫描仪(11)的第二位姿；根据三维点面信息和第一位姿，重建被扫描对象的三维模型；根据色彩纹理信息和第二位姿，在三维模型的表面生成色彩纹理。
Patent WO-2021238435-A1 (WO)
Title: Health management method for post-traumatic stress disorder patient, and related device
Inventor: YAO ZHENYU
IPC: G16H20/70
Filed: 2021-04-09
Abstract: Provided are a health management method for a post-traumatic stress disorder patient, and a related device. The health management method comprises: obtaining health information of a user, and performing user registration and establishing an electronic health record according to the obtained health information (S101); displaying a select box regarding a health management mode, so that the user selects a situation mode and a scenario mode; receiving a selection result of the user for the health management mode, and determining the health management mode selected by the user (S102); and displaying a corresponding health management guidance suggestion according to the health management mode selected by the user (S103). Using the health management method can assist in long-term periodic management of post-traumatic stress disorder patients.
Patent WO-2022041771-A1 (WO)
Inventor: LI DINGGUO
IPC: B23K37/02
Filed: 2021-04-15
Abstract: 一种焊接机器人加工用工作台及其使用方法，包括支撑台（1），支撑台（1）的上部滑动安装有滑座（2），滑座（2）的上部设有旋转机构（3），旋转机构（3）包括有旋转台（301）、旋转电机（302）、转轴（303）、主动锥齿（304）和从动锥齿（305），旋转台（301）的上部设有角度调节机构（4），角度调节机构（4）包括有支撑板（401）、工件台（402）、连接轴（403）、气缸（404）和轴座（405）。焊接机器人加工用工作台能够实现旋转的功能，能够水平方向旋转焊接工件，提高工作效率，其次，具备垂直方向角度调节的功能，能够满足焊接机器人对焊接工作角度的要求，提高焊接效果，减少工作耗时，此外，能够对焊接时产生的焊烟进行处理，避免焊烟直接排放对工作人员产生身体健康上的影响，使用效果更好。
Patent WO-2022095384-A1 (WO)
Inventor: CAO SHAOQIANG
IPC: C08K3/32
Filed: 2021-04-30
Abstract: 一种高灼热丝聚甲醛组合物，其包括如下重量份的组分：POM树脂40～60份、阻燃剂母粒40～55份、润滑剂0.5～2份、主抗氧剂0.1～0.5份和辅抗氧剂0.1～0.3份；所述阻燃剂母粒包括如下重量百分含量的组分：热塑性聚氨酯弹性体21％～32％、聚磷酸铵50％～70％和三聚氰胺氰尿酸盐9％～18％，所述热塑性聚氨酯弹性体的邵氏A硬度为75～95A。
Patent WO-2021228114-A1 (WO)
Inventor: WANG YUE
IPC: H01L51/50
Filed: 2021-05-12
Abstract: 提供一种式(I)的硼氮化合物、包含所述化合物的组合物及它们在有机电致发光领域中的应用。通过采用所提供的化合物或组合物制备的有机电致发光器件能实现具有窄光谱发射的高效绿光和红光电致发光。
Patent WO-2021258906-A1 (WO)
Inventor: TAO XINGMING
IPC: A24F40/42
Filed: 2021-05-14
Abstract: A vaporization component includes: a base, a first hole in the base, and a valve structure. The valve structure is configured to open or close the first hole.
Patent WO-2022217733-A1 (WO)
Title: Medical hydrogel and preparation method therefor and use thereof
Inventor: ZHAO BO
IPC: A61L24/04
Filed: 2021-06-10
Abstract: The present invention relates to the field of biomedical materials, and in particular to a medical hydrogel and a preparation method therefor and a use thereof, and a kit for preparing the medical hydrogel. The medical hydrogel of the present invention comprises a hydrogel matrix and a chelating agent chelating with the hydrogel matrix, wherein the hydrogel matrix comprises a polymer having multiple "long arms" and formed by the bonding of a polyethylene glycol derivative I having a structure represented by formula (I) and a polyethylene glycol derivative II having a structure represented by formula (II). After tannic acid and/or citric acid are/is used as a chelating agent to chelate with the hydrogel matrix, a medical hydrogel having good bacteriostatic properties, mechanical properties, adhesion properties, low swelling, and controllable gelation rate and degradation rate can be obtained. In addition, the hydrogel can remain viscous in a wet state without being affected by body fluids, can still ensure effective adhesion and wound surface closure even when a tissue is in a motion or pulsating state, and has great clinical application prospects.