668results about How to "Precise regulation" patented technology

A system and method is disclosed for the provision of assisted breathing by the delivery of a controlled pressurized airflow to the pulmonary airway of a user with breathing disorders. The system comprises a source of compressed respiratory gas, a user nasal interface unit including at least one Venturi device and a thin flexible tubing connecting between the source of high pressure gas and the Venturi device. The system and method provide a regulated and controlled flow of air to the user in accordance with the user needs. The invention further discloses a novel small light-weight nasal user interface for replacing prior art breathing masks.

This application relates to a hybrid power supply apparatus comprising a fuel cell and an energy storage device for use in off-road electric vehicles, such as lift trucks. The apparatus is a substitute for conventional lead acid batteries and is sized to fit within a conventional lift truck battery receptacle tray. The fuel cell and fuel processor systems are designed to meet the average load requirements of the vehicle, while the batteries and power control hardware are capable of responding to very high instantaneous load demands. The invention has a similar electrical interface as conventional battery systems and does not require vehicle modification. The apparatus is air-cooled to ensure that the hybrid power components operate within a preferred temperature range and to maintain the external surfaces of the apparatus and exhaust gases within safe temperature limits. Apart from vehicular applications, low power hybrid fuel cell products as exemplified by the present invention may also find application in uninterruptable power supply systems, recreational power, off-grid power generation and other analogous applications.

A system and method are disclosed for the provision of assisted breathing by the delivery of a controlled pressurized Airflow to the pulmonary airway of a user with breathing disorders. The system comprises a source of compressed respiratory gas (112), a user interface unit (115) including at least one Venturi device (120) and a thin flexible tubing (116) connecting between the source of high pressure gas (112) and the Venturi device. The system and method provide a regulated and controlled flow of air to the user (105) in accordance with the user needs. The invention further discloses a novel small light-weight user interface for replacing prior art breathing masks.

The invention discloses an artificial synaptic device based on a photoelectric coupling memristor and a modulation method of the artificial synaptic device. The artificial synaptic device comprises an upper electrode, a lower electrode and a functional material layer, wherein the functional material layer is arranged between the upper electrode and the lower electrode, the upper electrode, the functional material layer and the lower electrode jointly form a sandwich structure, the functional material layer is made of a material having a photoelectric effect, the lower electrode is a transparent conductive electrode, an electrical signal is input through the upper electrode and the lower electrode, and an optical signal is input through the transparent conductive electrode. In the artificial synaptic device provided by the invention, light is introduced as a control signal of the other end except the electrical signal, two control ends of the artificial synapse device are expanded to three ends, the artificial synaptic device can generate resistance change under an external optical excitation signal by the additionally-arranged end, the artificial synaptic device can be configured to be in a plurality of resistance states correspondingly by selection and control of intensity, frequency and optical pulse time of the optical excitation signal, and various synaptic plasticity functions are correspondingly achieved.

A method of controlling an output voltage of a pulse width modulation (PWM) converter with a PWM signal driving a power switch of the converter may include using a comparator to compare a reference voltage with a scaled output voltage of the converter, incrementing or decrementing an up/down counter at each pulse of a clock signal applied to the counter depending on a state of the comparator, and controlling the comparator to generate the PWM signal with a control voltage selected from a look-up table using a value of the counter.

A system and method for the production and capturing of clean vapors from the vaporizing of a plant substance is described. The system includes a heating system configured to generate heat within a cooking unit. A temperature control system is configured to monitor the level of heat generated by the heating system. Both systems are regulated by a control unit. The control unit is configured to provide an interface for a user to regulate the performance of the temperature control system and the heating system. The cooking unit defines a fully enclosed volume to contain the heat generated. A valve body is in communication with the cooking unit and configured to regulate the release of gases within the cooking unit as it passes into a bag member. The bag member is used to capture released vapor generated by vaporizing the plant substance.

The invention discloses an air conditioner load control system based on personnel information detection. The air conditioner load control system comprises a BP neural network module used for completing training and predicting the air conditioner load quantity and further comprises a personnel information detection module used for detecting personnel information within the air conditioner working range. The personnel information comprises the personnel types and the corresponding quantities. The BP neural network module is provided with a corresponding relation between an air conditioner load and the personnel information. The invention further discloses an air conditioner load control method based on personnel information detection. According to the air conditioner load control system and method based on personnel information detection, compared with other personnel number acquisition technologies used for air conditioner load predicting, the personnel load requirement difference can be better analyzed, and the air conditioner load control system and method have very important significance for precise load management and control, internal personnel thermal comfort strengthening and comfortable artificial environment creating.

The invention discloses a preparation method of mesoporous silica spherical nano particles with a dendritic pore structure. A template agent adopted by the method is cetyltrimethyl p-methylbenzene ammonium sulfonate, an alkali source is organic small-molecular amine, and a silicon source is tetra-alkyl silicate ester; the added co-surfactant is a three-block neutral polymer F127; in the raw materials, the molar ratio of the silicon source to the template agent to organic small-molecular amine to F127 to water is 1:(0.03-0.06):(0.001-8.0):(0.0001-0.1):(20-1,000); the particle sizes of the particles can be effectively controlled from 20nm to 200nm. By simply controlling the addition amount of the co-surfactant F127 and the addition order before and after the silicon source, the particle size of the mesoporous silica with a dendritic pore structure can be effectively controlled. The synthesis method provided by the invention is simple and low in cost, has a short period and good repeatability, and is environment-friendly.

The invention discloses a full-automatic chemiluminiscence tester and belongs to the field of chemiluminiscence testing.The full-automatic chemiluminiscence tester comprises a mechanical arm module, a refrigeration module, a power module, a reagent sample disk, a sampling needle component, a stirring component, a reaction cup frame, an incubation device, a magnetic separation component, a washing station component and a measuring room.Full-automatic management is achieved for mixing, reacting, incubating, magnetic separating, detecting and other procedures of a sample to be tested, the detection efficiency is improved, and operation errors are reduced.

The invention discloses a novel RGO/MXene composite film and a preparation method thereof, and the method comprises the following steps: carrying out reduction processing on GO through DA to prepare RGO; stripping MAX by using a LiF and HCl mixed solution to obtain a two-dimensional MXene material with a clear lamellar structure; ultrasonically mixing an MXene dispersion solution and an RGO dispersion solution, constructing the RGO/MXene composite film on a PVDF film substrate in a vacuum filtration manner, and applying the RGO/MXene composite film to processing of industrial wastewater. According to the method, the synergistic film-forming mechanism and the separation mechanism of the RGO and the MXene are explored in detail, and some reference significance is provided for further widening the application range of the MXene and developing and constructing more novel high-performance film materials. From the perspective of improvement of the structure of the film material, the processing efficiency and the recyclability of the film are improved, and finally the practical purpose of reducing the industrial wastewater processing cost is achieved.

A wind power plant having a device for adjusting the angle of pitch of the rotor blades situated on a hub, the rotor blades being able to be set via respectively at least one asynchronous motor in normal operation, and being able to be rotated into their safety position (feathered pitch) in emergency operation. The asynchronous motor is fed in emergency operation via a commutator driven by a DC motor from a DC source that is independent of the network.

The invention provides a forced dormancy culture method for peach with leaves, which comprises the following steps of: spraying a somnifacient to a peach tree so that the peach with leaves enters dormancy; then carrying out artificial four-section temperature change and reduction processing of the peach with leaves; supplementing illumination by an illumination supplementing lamp during temperature reduction; spraying a dormancy breaking agent to the peach tree when the final reduced temperature is reached so that the peach tree is released from the dormancy; after the dormancy is broken out, leading the peach tree to grow by embedding and covering a straw on a soil layer of the root of the peach tree to be used as a temperature booster and fermenting to maintain the temperature of the soil layer to be more than 10 DEG C; and carrying out illumination supplementation by the illumination supplementing lamp from a peach tree sprouting period to a fruit coloring period. By the steps of spraying the somnifacient to a peach tree plant, artificially cooling the peach with leaves, spraying the dormancy breaking agent, artificially supplementing illumination in the cooling period, heating by a biological temperature booster and carrying out artificial illumination supplementation processing in the growing and developing period, the peach can be ripe in the period of the Spring Festival by the method. The invention has the characteristics of obvious effect, convenient implementation, accurate adjustment and control and high operability and is suitable for being used for controlling the culture of the ripe period of the peach and other fruits.

The invention discloses a navigation control method of a medical capsule endoscope and solves the problem of external active control on the capsule endoscope when the permanent magnet capsule endoscope performs internal examinations. The method that a permanent magnet and an electromagnetic coil are combined to control internal stable suspension motion of the capsule endoscope is adopted. The control method comprises links including a sensor signal processing link, a feedforward control law link, a feedback control law link, a state estimator link and the like. In the sensor signal processing algorithm link, position information of the capsule endoscope is acquired from an original signal returned by a sensor; in the feedforward control law link, a theoretical output signal value at the steady state is calculated according to a theoretical model to serve as a basic output signal so as to reduce the system nonlinear effect; in the feedback control law link, closed-loop control is realized according to feedback position information to reduce system errors; the state estimator link is used for eliminating or reducing instability caused by system pure lag. With the adoption of the method, stable constraint of any position of the capsule endoscope in liquids in body cavities by an external device can be realized finally.

The invention discloses a protection method for automatically regulating a volume of a loudspeaker according to temperature raising of a voice coil. The protection method comprises the following stepsof: S1: acquiring a current value and a voltage value of an audio of the loudspeaker, and carrying out Fourier transform on the current value and the voltage value; S2: according to a frequency valueafter Fourier transform, obtaining an impedance curve of the voice coil; S3: reading the impedance curve, searching a nominal impedance RAC of the loudspeaker on the impedance curve, and according toa voice coil power and tolerance table corresponding to a material of the voice coil and according to a formula that RDC=RAC-XL(f1), obtaining a direct current resistance RDC, wherein the XL(f1) represents a voice coil inductance inductive impedance of of the loudspeaker under a frequency f1 corresponding to the nominal impedance; S4: carrying out comparison on a resistance value RDC of the acquired direct current resistance and a preset standard resistance value to obtain a resistance variation percentage; and S5: according to the resistance variation percentage and a metal temperature coefficient, calculating the temperature raising, and when the temperature raising exceeds a preset value, regulating input power of the loudspeaker by an attenuation signal. The protection method disclosed by the invention is accurate to monitor, wide in applicability and high in protection.

The invention relates to an elevating system of an objective table. The elevating system comprises a seat body and a connecting plate which can be arranged on the seat body by sliding, an air cylinder is fixedly arranged on the seat body, a piston rod arranged along the perpendicular direction is arranged on the air cylinder, the upper end and the lower end of the piston rod are respectively traveled through the air cylinder, the upper end of the piston rod is fixedly connected with the connection plate, the lower end of the piston is fixedly connected with a wedge-shaped lower inclined block, an upper inclined block which can be moved along the horizontal direction is also arranged on the seat body, a groove is arranged on the upper inclined block, the piston rod passes through the groove, the upper surface of the lower inclined block is parallel to the lower surface of the upper inclined block, the lower surface of the upper inclined block and the upper surface of the lower inclined block are respectively intersected with a plumb line, and the connecting line between the two intersection points is the stroke of the objective table; the flexible change of the stroke of the air cylinder is realized through a pair of wedge-shaped inclined blocks, and the accurate control for the stroke can be achieved through the drive of a screw rod. The elevating system has the advantages that the drive efficiency is high, the drive is accurate, the adjustment is convenient, and the stroke can be flexibly changed.

Charge pump circuitry (1) includes a master charge pump (2) including a voltage multiplier (5) and charge pump (30) which operate to produce a boosted, unregulated voltage (Vunreg), and also includes a slave charge pump (3) including a voltage multiplier (36) and charge pump (50) which operate to produce a boosted control voltage (Vctl) which then is filtered. The boosted, unregulated voltage (Vunreg) is regulated in response to the filtered, boosted control voltage (Vctl) to produce a boosted, regulated, low-noise voltage (Vreg). The boosted control voltage (Vctl), relative to a reference voltage (Vref_SH), is controlled by feedback circuitry (61,62,65) in response to the boosted, regulated, low-noise voltage (Vreg).

The invention provides an air conditioner control method, an air conditioner control system, a control device, an air conditioner, computer equipment, a computer readable storage medium and a terminal. The air conditioner control method comprises the steps that wireless connection with at least two indoor units is established; respective identification information of at least two indoor units is obtained and stored; a mode control instruction is received; at least one piece of identification information corresponding to the mode control instruction is recorded; a running instruction of work parameters of the air conditioner is sent to at least one indoor unit corresponding to recorded at least one piece of identification information so that at least one indoor unit can control the air conditioner to execute the corresponding operation according to the running instruction of the work parameters. According to the provided air conditioner control method, accurate regulation and control over at least one indoor unit of the air conditioner is achieved, mistaken regulation and control over the adjacent indoor units during regulation and control over a single indoor unit are avoided, operation steps are simplified, practicability is high, and the using experience of users is improved.

The invention discloses surface-treated metal, a surface treatment method of the metal and a metal and resin composite body. A hole used for filling of resin perpendicularly extends towards the interior of the metal from the surface of the metal, any position of the hole is expanded outwards or shrunk inwards, a cavity structure with the unequal hole diameter is formed, and through the cavity structure, the metal and the resin can form a better nano anchor bolt effect, and the connecting strength of the metal and resin composite body can be effectively improved; a multistage anodic oxidation method is adopted in the metal to treat the surface of the metal, the method is efficient, environment-friendly, reliable and high in repeatability, bonding force between a resin layer and a metal base material of the metal resin composite body is good, the excellent tensile shear strength is achieved, the resin source is wide, the method is suitable for industrial large-scale production, and the problem that according to an existing method, the defective percentage stays at a high level is solved.

The present invention is a flow metering system for accurately metering and regulating the flow rate of fluid in a gravity fed intravenous fluid delivery system. The fluid flow is directed through a flow path guide that is suspended at an angle from one end. As the fluid flows through the flow path guide, the flow path guide bends due to the weight of the fluid. A drop of fluid forms at the end of the flow path guide then falls off, thereby releasing the flow path guide, which springs back it its original position. The sequence of drops and springing back continues throughout the fluid delivery procedure, and is monitored by sensors. The resultant data is used by a processor to determine the flow rate of the fluid. The flow rate may be adjusted as needed by a flow regulator that is responsive to an adjustment actuator that is controlled by the processor.

The invention discloses a catalyst for preparing aromatic hydrocarbons through directed conversion of CO2, and relates to the technical field of catalytic hydrogenation. Metal oxide is adopted as a core, and a a molecular sieve is adopted as a shell so as to obtain the core-shell structure catalyst, wherein the metal ion center of the metal organic compound is one or more of Zn<2+>, Zr<2+>, Fe<3+>, Co<2+>, Ni<2+>, Cu<2+>, Cr<3+> and Mn<2+>, and the molecular sieve is one or more of ZSM-5, MCM-41, SAPO, MCM-22, USY and SBA-15. The catalyst for preparing aromatic hydrocarbons through directed conversion of CO2 has the characteristics of a uniform structure, uniform properties and precise regulation, the preparation process has simple procedures and high repeatability, and the prepared catalyst has the advantages of high conversion rate of CO2, high selectivity to aromatic hydrocarbons, a long service life, a wide application range and the like; and the prepared catalyst can be directly applied to preparation of aromatic hydrocarbons through directed conversion of CO2, and has an industrial value.