Abstract: The present invention relates to a carbonate reservoir filtration-loss self-reducing acid fracturing method.

Abstract: The present invention relates to an automatic cleaning device for suction port of electric submersible pump. The pipe string joint is connected between the oil pipe and the electric submersible pump. A plurality of oil drain passage inlets, steel balls, return springs, sealing plugs and oil drain passage outlets are evenly distributed in circumferential direction of a boss. The upper end of the connecting pipe is connected with the outlet of the oil drain passage, and the lower end is connected with the nozzle. The retaining ring secures the connecting pipe on the housing of the electric submersible pump. A high-pressure fluid ejected from the nozzle directly acts on the suction port of the electric submersible pump. The present invention can automatically clean the suction port of the electric submersible pump by relying on the pressure difference between the outlet and the suction port of the electric submersible pump.

Abstract: The present invention provides a pluripotent stem cell comprising a co-expression vector in which Runx1 and Hoxa9 are of in tandem, and a T cell differentiated therefrom and application thereof. In the present invention, Pluripotent stem cells inducibly co-expressing exogenous Runx1 and Hoxa9 are successfully established by introducing an exogenous vector co-expressing Runx1 and Hoxa9 into pluripotent stem cells. The pluripotent stem cells are directionally differentiated into T-lineage progenitor cells and will be developed into T cells. The pluripotent stem cell-derived T cells obtained by the method of the present invention are not only functionally normal but also have no tumorigenic risk.

Abstract: A medical device and medical device system for controlling delivery of therapeutic stimulation pulses that includes a sensing device to sense a cardiac signal and emit a trigger signal in response to the sensed cardiac signal, a therapy delivery device to receive the trigger signal and deliver therapy to the patient in response to the emitted trigger signal, and a processor positioned within the sensing device, the processor configured to determine whether the sensed cardiac signal exceeds a possible P-wave threshold, compare a portion of the sensed cardiac signal to a P-wave template having a sensing window having a length less than a width of the P-wave, confirm an occurrence of a P-wave signal in response to the comparing, emit the trigger signal in response to the occurrence of a P-wave signal being confirmed, and inhibit delivery of the emitting signal in response to the occurrence of a P-wave signal not being confirmed.

Abstract: The present invention discloses a mobile operating platform for a paddy field, including a body, a power generating device, a movement control system, a draft control system and an automatic leveling system, where the power generating device, the movement control system, the draft control system and the automatic leveling system are all mounted on the body. The present invention has a compact overall structure, and utilizes the pressure of a water flow to realize the movement of the platform, and can fully utilize the characteristics of the water flow to reduce power consumption, and avoid the use of a heavy and complicated traditional walking device, the entire mobile operating platform for a paddy field does not contact the ground, saving mechanical power and avoiding damage to an aquatic crop; the draft control system adjusts a draft by the amount of water filled in a closed cavity in the body.

Abstract: An automatic steering device of an agricultural machine is provided, which is connected with a steering axle of the agricultural machine and comprises: a data acquisition unit for acquiring data information of the agricultural machine, the data information comprises an actual steering angle value, a travelling position and a travelling direction; a driving unit for providing a rotating torque; a steering unit connected with the driving unit and the steering axle and used for transmitting the rotating torque to the steering axle; and a control unit connected with the data acquisition unit and the driving unit, used for obtaining a steering angle value according to the data information of the agricultural machine, and controlling the driving unit according to the steering angle value. The embodiments have simple structure, can be suitable for the agricultural machine with different steering angle ranges, and have high efficiency and simple operation.

Abstract: An apparatus for diagnosing and controlling the aerodynamic stability of a compressor and method there of are provided. The apparatus includes a measurement device (100), a signal processing device (200) and a control and execution device (300), wherein the measurement device (100) is configured to measure the pressure or velocity fluctuations of air flows in different positions inside a compressor in real time, and to transmit real-time measurement signals obtained from different positions to the signal processing device (200); the signal processing device (200) is configured to determine, according to the real-time measurement signals, a type and spatial distribution of instability precursor in the compressor, and to output corresponding control strategy signals to the control and execution device (300); and the control and execution device (300) executes, according to the received control strategy signals, corresponding control actions to regulate the stability of the compressor (S3).

Abstract: Provided are a phase transition material fluid and a proppant formed therefrom, wherein the components for preparing the phase transition material fluid comprise in percentages by mass: a supramolecular building block 10 to 60 wt %, a supramolecular functional unit 20 to 50 wt %, a dispersant 0.1 to 2 wt %, an inorganic co-builder 0.1 to 1 wt %, an initiator 0.1 to 1 wt %, the balance being a solvent. The supramolecular building block comprises a melamine-based substance and/or a triazine-based substance; the supramolecular functional unit comprises a dicyclopentadiene resin; and the dispersant includes a hydroxyl-bearing polysaccharide substance and a surfactant. After the phase transition material fluid enters the reservoir, it may form a solid substance to prop the fracture under the action of supramolecular chemistry and physics.

Abstract: The present invention discloses a mobile operating platform for a paddy field, including a body, a power generating device, a movement control system, a draft control system and an automatic leveling system, where the power generating device, the movement control system, the draft control system and the automatic leveling system are all mounted on the body. The present invention has a compact overall structure, and utilizes the pressure of a water flow to realize the movement of the platform, and can fully utilize the characteristics of the water flow to reduce power consumption, and avoid the use of a heavy and complicated traditional walking device, the entire mobile operating platform for a paddy field does not contact the ground, saving mechanical power and avoiding damage to an aquatic crop; the draft control system adjusts a draft by the amount of water filled in a closed cavity in the body.

Abstract: A multiple lens-based smart mechanical arm, wherein it comprises a multi joint multi-functional mechanical arm, a CCD camera for collecting PCB board images to be assembled, a bio-contact device, and a computer; the CCD camera is mounted on the multi joint multi-functional mechanical arm, the bio-contact device is mounted on the fingertip of the multi joint multi-functional mechanical arm, and the CCD camera, and the bio-contact device and the multi joint multi-functional mechanical arm are connected to the computer. The invention adds a biological tactile device on the basis of the binocular positioning to accurately locate the assembly target area and improve the accuracy of the assembly of the irregular parts. The conversion relationship between the pressure and electric output of the sensitive material in the bio-contact device and the mathematical model of pressure and position is applied.

Abstract: The present invention relates to a carbonate reservoir filtration-loss self-reducing acid fracturing method.

Abstract: An interframe registration and adaptive step size-based non-uniformity correction method for an infrared image, comprising: first calculating a normalized cross-power spectrum of n-th and (n?1)-th original infrared images with the non-uniformity, and then calculating a horizontal relative displacement and a vertical relative displacement of the n-th and (n?1)-th original infrared images with the non-uniformity; calculating a space variance and a time variance of each pixel of the n-th original infrared image with the non-uniformity, using the obtained space variance and time variance to calculate an adaptive iterative step size of each pixel of the n-th original infrared image with the non-uniformity, and using the iterative step size to update a gain correction coefficient and a bias correction coefficient; finally, performing non-uniformity correction on the pixel in an overlapping area of the n-th and (n?1)-th original infrared images with the non-uniformity.

Abstract: A high frequency response pressure sensor based on direct current glow discharge plasma principle is provided, including: discharging electrodes including a cathode and an anode and used for generating a plasma between the cathode and the anode under the effect of a high voltage direct current power supply; a support structure used for supporting and fixing the discharging electrodes and ensuring that a stable gap is provided between the cathode and the anode; and a shielding casing used for shielding the plasma from an external gas so that the plasma remains unaffected by a flow speed of the external gas and senses only a change in pressure of the external gas. The high frequency response pressure sensor is not affected by mass inertia and has the potential of breaking through MHz high frequency response.

Abstract: Techniques for maintaining high availability servers are disclosed. For example, a method comprises the following steps. One or more client requests are provided to a first server for execution therein. The one or more client requests are also provided to a second server for storage therein. In response to the first server failing, the second server is configured to execute at least one client request of the one or more client requests provided to the first server and the second server that is not properly executed by the first server.

Abstract: The present disclosure relates to a frame sealant, a preparation method therefor, and a display mother substrate and a display device using the same. The sealant includes: 20-30 parts by weight of a long-chain acrylate emulsion, 4-8 parts by weight of a photoinitiator, 10-20 parts by weight of a methacrylate, and 46-66 parts by weight of fibers.

Abstract: A message authentication and communication method for a communication network system comprises: the access control device receiving a communication establishment request sent by the first mobile apparatus; the access control device sending a communication mutual authentication request to the authentication server in response to the communication establishment request; the access control device receiving a mutual authentication response message sent by the authentication server in response to the communication mutual authentication request; the access control device authenticating the mutual authentication response message; when the mutual authentication response message is authenticated successfully, the access control device sending a mutual authentication message to the first mobile apparatus.

Abstract: The invention discloses a calculation method for dynamic fluid loss of acid-etched fracture considering wormhole propagation, which is applied to pad acid fracturing process, comprising the following steps: Step 1: dividing the construction time T of injecting acid fluid into artificial fracture into m time nodes at equal intervals, then the time step ?t=T/m and tn=n?t, where, n=0, 1, 2, 3, . . . , m, and to is the initial time; Step 2: calculating the fluid loss velocity vl(0) in the fracture at t0; Step 3: calculating the flowing pressure distribution P(n) in the fracture at tn; Step 4: calculating the width wa(n) of acid-etched fracture at tn; Step 5: calculating the wormhole propagation and the fluid loss velocity vl(n) at tn; Step 6: substituting the fluid loss velocity vl(n) into Step 3, and repeating Step 3 to Step 6 in turn until the end of acid fluid injection.

Abstract: An application is used to identify a data identifier associated with data to be queried. The application and the data identifier are used to identify data in a cache associated with the data identifier and a first version identifier corresponding to the data in the cache associated with the data identifier. In response to determining that the first version identifier does not match a second version identifier, the application is used to obtain data from a database associated with the data identifier, and the application is used to replace the data in the cache associated with the data identifier with the data from the database associated with the data identifier.

Abstract: An apparatus includes a processor to: train a first neural network of a chain to generate first configuration data including first trained parameters, wherein the chain performs an analytical function generating a set of output values from a set of input values, each neural network has inputs to receive the set of input values and outputs to output a portion of the set of output values, and the neural networks are ordered from the first at the head to a last neural network at the tail, and are interconnected so that each neural network additionally receives the outputs of a preceding neural network; train, using the first configuration data, a next neural network in the chain ordering to generate next configuration data including next trained parameters; and use at least the first and next configuration data and data indicating the interconnections to instantiate the chain to perform the analytical function.

Abstract: A dynamic five-hole probe includes a pressure sensing part, a pressure measuring hole transition section, a pressure acquisition section, dynamic pressure sensors and flexible wall pressure buffering tubes, the pressure sensing part being provided with pressure measuring holes to sense three dimensional dynamic pressure components of an airflow; the pressure measuring hole transition section transits from an inlet end surface five-hole structure into an outlet end surface five-hole structure; the pressure acquisition section has therein a centrally symmetric pressure measuring hole structure; pressure sensor mounting holes are in communication with the five pressure measuring holes; each of the dynamic pressure sensors is mounted in a corresponding one of the sensor mounting holes to measure a dynamic pressure of the airflow. The pressure sensing part may have a diameter of 3 mm or less.