Abstract: Disclosed is a recoverable and self-expanding short-frame valve suitable for aortic valve regurgitation, including a tubular frame and valve leaflets. The tubular frame can contract to a delivery configuration or expand to a use configuration in a radial direction; the tubular frame includes a first portion and a second portion integrally formed and coaxially arranged; a waist portion is formed at the junction of the first portion and the second portion when the tubular frame is in the use configuration; and the second portion is divergently arranged in a direction away from the waist portion. According to the present disclosure, the complete recovery of the valve can be realized without affecting the later coronary intervention.

Abstract: A photodiode chip, a photodiode, and a method for controlling a wavelength of a photodiode are provided. The photodiode chip sequentially incudes, above a substrate, a grating layer and a ridge waveguide layer. The ridge waveguide layer includes multiple ridge waveguides. Each of the multiple ridge waveguides corresponds to one column of gratings in the multiple columns of gratings below. The grating layer includes multiple columns of gratings. At least two columns of gratings have different grating period pitches.

Abstract: An ultrahigh-pressure acid-fracturing isodiametric hose assembly, comprising a hose body and a metal joint. The metal joint comprises an inner tube, a first outer tube the inner tube, and a second outer tube. The first outer tube and the second outer tube each is an independent pressing part. An external groove is provided at an outer wall of the inner tube. An end of the first outer tube comprises an internal ridge which matches the external groove for snapping. The terminal of the inner tube comprises a connecting portion. An outer wall of the inner tube comprises a first protrusion, and an inner wall of the first outer tube comprises a second protrusion engaging with the first protrusion. The hose body is clamped between the first protrusion and the second protrusion that are engaged. An inner wall of the second outer tube comprises multiple micro-protrusions.

Abstract: An atmospheric-vacuum heat exchange system with a winding-tube heat exchanger, has a first and second heat exchanging group; a primary distillation tower (4) or flash tower; an atmospheric furnace (5); an atmospheric tower (6); a vacuum furnace (7) and a vacuum tower (8); each winding-tube heat exchanger has a shell-pass cylinder (370), a first and second shell-pass connecting tube (371,372), a first and second tube plate (330,340), a plurality of first and second tube box (310,320), a plurality of heat exchange tubes (360) spirally wounded with multiple spiral tube layers; the number of the first and second tube box (310, 320) are respectively N, and each spiral tube layer has N group(s) of the wounded heat exchange tubes (360), N is a natural number greater than or equal to 1. The loss of heat exchanger is reduced.

Abstract: The present invention provides a rabies virus monoclonal antibody 2F2 and universal rabies virus antibody rapid detection test paper and belongs to the technical field of biological detection. An amino acid sequence of the monoclonal antibody 2F2 is shown as SEQ ID No. 1. The monoclonal antibody 2F2 provided by the present invention specifically binds to rabies virus G proteins, and preparation of the monoclonal antibody 2F2 into test paper has the advantages of rapidity, accuracy, sensitivity, specificity and low cost.

Abstract: A network speed map indicating data rates (e.g., download speeds) provided by a mobile network within a geographical area can be created based on crowd-sourced data. An example process includes receiving a plurality of data samples from mobile devices, each sample including a CQI value and a geolocation. Efficiency values can be determined from sampled CQI values associated with a bin of interest within the geographical area, and a spectrum efficiency value associated with the bin can be determined based on the determined efficiency values. A data rate (e.g., a download speed) associated with the bin can be estimated based on the spectrum efficiency value, and a network speed map showing one or more bins, including the bin, with estimated data rates (e.g., download speed) can be generated and displayed on a user computing device.

Abstract: An adaptive network operation (ANO) server configured to reduce unnecessary radio operation during lower and/or non-traffic times is described herein. The ANO server may receive raw data associated with one or more nodes within a telecommunications network. Responsive to receiving the raw data, the ANO server may determine, based at least in part on the raw data, a traffic level associated with the one or more nodes and/or a traffic capacity associated with the one or more nodes. The ANO server may determine one or more frequency bands and/or channels to activate and/or deactivate and may generate configuration settings to send to the one or more nodes.

Abstract: The present invention relates to a heat shrinkable film having a shrink onset temperature of 60° C. or lower and a shrink tension of 6 N/mm2 or lower. The film comprises a copolyester and/or copolyester blend derived from components including a terephthalic acid or an ester thereof; ethylene glycol (EG); 2-methyl-1,3-propanediol (MPO); diethylene glycol (DEG); and one or both of 2-dimethylpropane-1,3-diol (NPG) and 1,4-cyclohexanedimethanol (CHDM).

Abstract: A telecommunication device configured to select one of a plurality of network connectivities of the telecommunication device to use for transmission of a network packet is described herein. The telecommunication device may select the network connectivity based on user routing criteria, connectivity metrics, or transmission times. The user routing criteria may be dynamically updated during a communication or connection, affecting selection of the network connectivity for further network packets. The network connectivities may be respectively associated with different network operators. Also, the telecommunication device may select a first network connectivity for transmitting a first network packet and a second network connectivity for transmitting a second network packet. Further, the telecommunication device may select a first network connectivity for uplink communications and a second network connectivity for downlink communications.

Abstract: The present application relates to a battery management and control system for a flow battery. An example battery management and control system includes an alternating current distribution box, a rectifying and inverting device, a flow battery including a battery pack that outputs direct current power, a positive electrode pump driver, and a negative electrode pump driver. The rectifying and inverting device connected to the battery pack inverts the direct current power into alternating current power and outputs the alternating current power. The alternating current distribution box is connected respectively to a power grid, the rectifying and inverting device, the positive electrode pump driver and the negative electrode pump driver. The box continuously supplies alternating current power to at least one of the positive electrode pump driver, the negative electrode pump driver or an additional system from either the power grid or the rectifying and inverting device.

Abstract: The application relates to a distributed large-scale system of an all-vanadium redox flow battery, comprising a main electrical energy storage center, power distribution subsystems and a control subsystem. If the power of the power distribution subsystem does not meet a preset power requirement and/or the distance between the power distribution subsystem and the main electrical energy storage center exceeds a preset distance, a sub electric energy storage center connected with the main electrical energy storage center is arranged in the power distribution subsystem. The power distribution subsystem comprises an electric energy load point and/or an electric energy access point. The main electrical energy storage center and the plurality of power distribution subsystems are electrically connected with the control subsystem respectively. The power supply system has the effect of meeting the power increase and decrease requirements of a plurality of distributed external loads or power supply systems.

Abstract: An electric coolant pump includes a pump house, a motor connected to the pump house, and an impeller housed in the pump house and driven by the motor. The motor includes a stator and a movable unit rotatably mounted within the stator. The stator is provided with a central shaft. The movable unit includes a support body, a bearing assembly fixedly embedded in the support body, a rotor core fixed to the support body, and a plurality of permanent magnets attached to the rotor core. The bearing assembly includes at least one bearing rotatably sleeved on the central shaft. The support body is formed by an injection-molding process to wrap the bearing assembly and fixed connecting bearing assembly and the rotor core.

Abstract: A network speed map indicating data rates (e.g., download speeds) provided by a mobile network within a geographical area can be created based on crowd-sourced data. An example process includes receiving a plurality of data samples from mobile devices, each sample including a CQI value and a geolocation. Efficiency values can be determined from sampled CQI values associated with a bin of interest within the geographical area, and a spectrum efficiency value associated with the bin can be determined based on the determined efficiency values. A data rate (e.g., a download speed) associated with the bin can be estimated based on the spectrum efficiency value, and a network speed map showing one or more bins, including the bin, with estimated data rates (e.g., download speed) can be generated and displayed on a user computing device.

Abstract: A network speed map indicating data rates (e.g., download speeds) provided by a mobile network within a geographical area can be created based on crowd-sourced data. An example process includes receiving a plurality of data samples from mobile devices, each sample including a CQI value and a geolocation. Efficiency values can be determined from sampled CQI values associated with a bin of interest within the geographical area, and a spectrum efficiency value associated with the bin can be determined based on the determined efficiency values. A data rate (e.g., a download speed) associated with the bin can be estimated based on the spectrum efficiency value, and a network speed map showing one or more bins, including the bin, with estimated data rates (e.g., download speed) can be generated and displayed on a user computing device.

Abstract: A network speed map indicating data rates (e.g., download speeds) provided by a mobile network within a geographical area can be created based on crowd-sourced data. An example process includes receiving a plurality of data samples from mobile devices, each sample including a CQI value and a geolocation. Efficiency values can be determined from sampled CQI values associated with a bin of interest within the geographical area, and a spectrum efficiency value associated with the bin can be determined based on the determined efficiency values. A data rate (e.g., a download speed) associated with the bin can be estimated based on the spectrum efficiency value, and a network speed map showing one or more bins, including the bin, with estimated data rates (e.g., download speed) can be generated and displayed on a user computing device.

Abstract: Systems and methods are described herein for identifying areas of maximum congestion so that small cells can be deployed at those specific sites to obviate network congestion problems. The systems and methods identify several input sources (e.g., call data records, passively collected data using Mobile app, etc.) that can be used to identify data congestion. The systems and methods divide a particular geographic area into smaller tiles of a certain shape (e.g., hexagon, square, etc.). For each of the geographic tiles, the systems and methods sort and group the input data samples based on their associated congestion discriminating characteristics (e.g., timestamps, type of input data, etc.). The systems and methods then compute a congestion index for each geographic tile area based on the grouped data samples. In this manner, the systems and methods identify geographic tile areas and time periods of high congestion.

Abstract: An adaptive network operation (ANO) server configured to reduce unnecessary radio operation during lower and/or non-traffic times is described herein. The ANO server may receive raw data associated with one or more nodes within a telecommunications network. Responsive to receiving the raw data, the ANO server may determine, based at least in part on the raw data, a traffic level associated with the one or more nodes and/or a traffic capacity associated with the one or more nodes. The ANO server may determine one or more frequency bands and/or channels to activate and/or deactivate and may generate configuration settings to send to the one or more nodes.

Abstract: A system, apparatus and method is disclosed for multiband wireless communication. Frequency bands and/or transmission formats are identified as available within a range for wireless communication. The system evaluates signal quality metrics for each frequency band and selects a communication method based on the evaluation. Multiple frequency bands and communication methods can be utilized by the system such that a combination of licensed, unlicensed, semilicensed, and overlapped frequency bands can be simultaneously used for communication. The system monitors communications and can report link performance for adaptive control of the selected communication methods.

Abstract: In an embodiment, an image sensor includes: first and second voltage rails; first and second regulators configured to generate first and second regulated voltage at the first and second voltage rails, respectively; and a plurality of pixels coupled to the first and second voltage rails. Each pixel includes: first and second transistor coupled first and second storage capacitor, respectively. A third transistor is coupled between a control terminal of the first transistor and the first or second voltage rails. The third transistor is configured to limit a slew rate of current flowing between the control terminal of the second transistor and the first or second voltage rails to a first slew rate when the image sensor operates in global shutter mode, and to a second slew rate when the image sensor operates in rolling mode, the first slew rate being smaller than the second slew rate.

Abstract: A SD-1 strain of Klebsiella pneumoniae from mink and its application are disclosed, wherein the collection number of the Klebsiella pneumoniae is CGMCC NO: 17901. The Klebsiella pneumoniae SD-1 strain can be used for preparing a vaccine. The preferred form of the vaccine is an inactivated vaccine. The SD-1 strain of Klebsiella pneumoniae was screened from minks that died after vaccination. Compared with the current Klebsiella pneumoniae, the strain has mutated and is a new type of pathogenic strain. Vaccine prepared from the SD-1 strain provides better immune protection for minks.