35results about How to "Low-speed" patented technology

The invention combines the features of a supercharger, a turbocharger and turbo-compounding into one system, utilizing a hydraulic or mechanical continuously variable transmission to drive the turbocharger up to a specific speed or intake manifold pressure and then holding the ideal speed to keep it at the right boost pressure for the engine condition. The benefits of a supercharger, which is primarily good for high torque at low speed, and a turbocharger, which is usually only good for high horsepower at high speeds are merged. Once the exhaust energy begins to provide more work than it takes to drive the intake compressor, the invention recovers that excess energy and uses it to add torque to the crankshaft. As a result, the invention provides the benefits of low speed with high torque and the added value of high speed with higher horsepower or better fuel economy all from one system.

A passively stable personal hydrofoil watercraft that has a floation device, wherein a user can ride in a prone, kneeling, or standing position. The watercraft includes a strut having an upper end interconnected with the flotation device and lower end connected with a hydrofoil. The hydrofoil greatly reduces the power required to travel at higher speed. The watercraft also includes a propulsion system connected to the hydrofoil. Both longitudinal and directional control of the watercraft is via weight shift, eliminating the need of any movable surfaces. The floation device, strut, and hydrofoil may be permanently interconnected or may be detachable.

An energy converter for inducing membrane vibrations when subject to a fluid flow and converting the kinetic energy embedded in the fluid flow into another form of energy, such as electricity. The energy converter includes a supporting structure and multiple generator units. Each generator unit includes at least one flexible membrane, and at least one electrical conductor and at least one magnetic field generator configured to apply a magnetic field to the at least one electrical conductor, wherein one of the electrical conductor and the magnetic field generator is attached to the membrane and configured to move with the membrane. Each membrane vibrates when subject to the fluid flow and has at least two ends supported by the supporting structure. The vibration of each membrane creates a relative movement between the conductor and a magnetic field generated by the magnetic field generator, which induces a current. A power conditioning circuit is provided to condition the current.

An energy converter for inducing membrane vibrations of a membrane when subject to a fluid flow, and converting the vibrations into another form of energy, such as electricity. The energy converter includes at least one flexible membrane, at least one electrical conductor and at least one magnetic field generator configured to apply a magnetic field to the at least one electrical conductor. One of the electrical conductor and the magnetic field generator is attached to the membrane and configured to move with the membrane. The other one of the electrical conductor and the magnetic field generator has a curved surface bending towards the membrane. When subject to a fluid flow, the membrane vibrates and creates a relative movement between the conductor and the magnetic field, which induces a current.

A vertical takeoff and landing (“VTOL”) unmanned aerial vehicle (“UAV”) incorporates a pair of substantially identical thrust-vectoring engines, e.g., turbofans, which are respectively mounted on opposite sides of the aircraft at substantially equal lateral and vertical distances above or below, and at substantially equal longitudinal distances forward and aft of, the center of gravity of the aircraft. The thrust vectoring of the engines can be either two-dimensional or three-dimensional, and can be effected by rotatable vanes, flaps, nozzles or combination thereof, on the engines. By locating the engines equidistantly from the center of gravity of the aircraft and re-spectively forward and aft of its pitch axis, the aircraft is provided with VTOL capability, including hovering, and the operation of its conventional attitude control mechanisms are substantially enhanced at both very low and very high speeds. The vehicle is particularly well suited to missions in hostile urban environments, such as cities.

The invention mainly discloses a high-precision small storage robot applicable to large space carrying. The robot comprises a walking mechanism, a transmission mechanism and an execution mechanism, the transmission mechanism comprises a base, a rotating platform and a transmission arm, the base is fixed to the walking mechanism, a support arm is arranged on the upper portion of the base, the upperend of the support arm is rotationally connected with the rotating platform which is internally provided with a lifting device, the lifting device is connected with the transmission arm which is internally provided with a telescopic device, the telescopic device is connected with the execution device, the base is internally provided with a rotating device which is connected with the rotating platform, and the rotating device drives the rotating platform, the transmission arm and the execution mechanism to rotate on the horizontal plane. Accordingly, the structure is simple, stable and compact, the occupied area is small, the degree of freedom is high, rotation is flexible, the motion precision is improved, the motion range is expanded, and the use cost is lowered.

The data storage system according to certain aspects can manage the archiving of virtual machines to (and restoring of virtual machines from) secondary storage. The system can determine whether to archive virtual machines based on usage data or information. The usage information may include storage usage, CPU usage, memory usage, network usage, events defined by a virtual machine software or application, etc. The system may archive virtual machines that are determined to have a low level of utilization. For example, a virtual machine can be archived when its usage level falls below a threshold level. The system may create a virtual machine placeholder for an archived virtual machine, which may be a “light” or minimal version of the virtual machine that acts as if it is the actual virtual machine. By using a virtual machine placeholder, a virtual machine may appear to be active and selectable by the user.

A method of deriving a digital terrain model from a digital surface model of an area of interest includes: dividing the area of interest into a plurality of area portions or patches; calculating, from the digital surface model, a set of candidate surfaces adapted to represent a ground surface in each area portion; if such set includes at least two candidate surfaces, estimating a distance from the ground surface of each candidate surface by using a function of a set of geometrical features related to the considered candidate surface, such function being derived from a known relation between a digital surface model and the height of the ground surface in a reference area; selecting, as a representation of the ground surface in each area portion, the candidate surface having the smallest distance from the ground surface, so as to obtain local digital terrain models; and merging the different digital terrain models.

A servo valve of water pressure consists of permanent magnet torque motor, pre-amplification unit and sliding valve power unit. It is featured as arranging filter stopper at two ends of filtering screen end to form concentric circular seam between said stopper and valve body, opening valve body fixed damping hole at valve body between said stopper and valve bush, using water contained in gap between spool and valve bush to form fixed liquid resistance and spool static pressure support of pre -amplification unit.

A high-density dynamic memory device with compact sense amplifier circuit is described. The memory device achieves high density through the use of a compact sense amplifier circuit that employs a single transistor to sense stored dynamic data. Functionality of the device is enabled by an architecture and method of operation that support a compact sense amplifier circuit. Enabling techniques include sequential sensing of memory columns, a two-pass write operation, a two-step refresh operation, a reference scheme that uses reference data stored in regular memory cells, and the application of digital signal processing to determine sensed data and cancel crosstalk noise.

A differential gearing for an energy generation plant, in particular for a wind power station, has three drives and outputs, a first drive being connected to a drive shaft of the energy generation plant, one output being connected to a generator (8), and a second drive being connected to an electrical machine as differential drive (6). The transmission ratio of the differential gearing (3) can be fixed at 1 by way of a brake (20).

The invention discloses a transmission mechanism for a permanent magnetic gear. The transmission mechanism comprises a stator assembly, an adjustable magnetic ring assembly, a rotor assembly and an enclosure assembly. The transmission mechanism is only provided with a layer of permanent magnet, so that the processing and assembling difficulty is smaller while a permanent magnet is saved. The permanent magnet is fixed by a built-in hole in a rotor core, and the condition that the permanent magnet is thrown away due to a centrifugal force generated by the rotor core during high-speed rotation is avoided, so that the permanent magnet is safe and reliable. The transmission ratio of the transmission mechanism can be changed according to the requirement; the output rotating speed of the transmission mechanism can be set to be constant according to the requirement. A damping bar made of a conductor material is arranged on the rotor core and can be used for cutting a magnetic field generated by a stator winding and forming induced current; a lorentz force generated by the induced current can form damping, so that the rotating speed and the torque of the rotor after starting are rapidly converged and the rotor stably operates; heat generated by the stator assembly, the adjustable magnetic ring assembly and the rotor assembly can be taken away by air current of the transmission mechanism.

The invention relates to an asymmetric FHE method and secret key substitution and cipher text delivery methods thereof. A private key and a public key are generated randomly, and the secret key is used to generate an operation support function, a unit cipher text of secret key encryption and a public key encryption operation support function; a plaintext is encrypted to generate a cipher text, namely, the secret key is used for encryption directly to obtain a direct cipher text, or the public key corresponding to the secret key is used to carry out encryption operation to obtain a compatible cipher text in the same secret key space; and when the cipher text needs to be delivered to the receiving end safely, the sending, receiving and server ends or the sending and receiving ends complete delivery of the cipher text. Operation of the cipher text is carried out directly without leakage of the plaintext, a safe data storage and operation environment is provided, the computing speed is improved substantially compared with the prior art, the required cipher text volume and expansion speed are lower, the methods can be realized in different manners, and a data owner can use different cloud computing services needless of worrying about leakage of sensitive and secrete data.

The invention discloses an automatic marine plankton classification method based on a convolutional neural network and digital holography. The method comprises the following steps: 1) shooting a holographic image of the marine plankton by using a digital holographic system; and 2) constructing a convolutional neural network model, setting a convolutional layer number, a convolutional kernel size,training parameters and a loss function, inputting the pictures obtained in the step 1) into a neural network, and operating the neural network to obtain a final classification result. The invention discloses a marine plankton rapid classification method based on a digital holographic image by combining a digital holographic technology with a deep learning technology in order to meet the requirements of high efficiency, low cost and rapidity aiming at wide application of a current digital holographic system to marine plankton.

A plurality of advanced angle chamber oil paths communicated to advanced angle hydraulic chambers and a plurality of retarded angle chamber oil paths communicated to retarded angle hydraulic chambers according to a change in rotating angle of a cam shaft are provided. The plurality of advanced angle chamber oil paths and the plurality of retarded angle chamber oil paths, respectively, are switched between communication and cut-off according to a rotating angle of the cam shaft. When torque in the direction of advanced angle acts in an advanced angle mode for phase shifting in the direction of advanced angle, the advanced angle hydraulic chambers are caused to communicate to a hydraulic power source and the retarded angle hydraulic chambers are caused to communicate to a drain. Also, at high speed of an engine, in the advanced angle mode, shut-off valves in the advanced angle chamber oil paths and the retarded angle chamber oil paths are opened so that hydraulic pressure is communicated from the hydraulic power source to the advanced angle chambers at all times in the same manner as in the related art.

The invention provides a reinforced structure for gear and rotating shaft connection. The structure comprises a gear, a flat key, a rotating shaft, a reinforcing column, an adjusting hole and buckles;the rotating shaft is fixedly arranged on the inner side of the gear, second springs are fixedly connected to one side faces of the two buckles, a movable cavity is formed in the periphery of the rotating shaft, the reinforcing column is fixedly connected to the middle of each support block, arc clamping grooves are formed in the two sides of the top of the reinforcing column, first springs are fixedly connected to the left end and the right end of the support block, and a screw is fixedly connected to the upper portion of a convex connecting block. Accordingly, by means of cooperation of thereinforcing column and the fixed cavity, when the gear rotates at a high speed, the reinforcing column can be thrown out of the rotating shaft by means of centrifugal force, then the reinforcing column is fixed through the fixed cavity so that the joint of the gear and the rotating shaft can be reinforced through the reinforcing column, and axial support is provided; meanwhile, the radial load ofthe flat key is shared, the phenomena of cutting, deforming and cracking of the flat key are reduced, and the stability and accuracy of the gear in the high-speed rotating process are enhanced.

The invention discloses a sabot separation device of a high-speed air cannon. The sabot separation device comprises a vacuum cavity, a deflating hole is formed in the vacuum cavity, and a thin film isarranged on the deflating hole. The separation device has small influence to the speed and attitude of an emitted projectile body and is convenient to install and maintain

The pontoon planer is a planer assembly for a pontoon boat that includes a pair of planer foils attached to the undersurface of the boat. Each foil presents a wedge-shaped profile, and a respective foil is disposed between the motor mount and a respective pontoon. The planers function to channel water in a downward direction to provide a lifting force to allow the pontoons to plane at lower speeds.

The invention relates to a method for tracking a target object. The method comprises the steps of collecting a moving object set of a frame image at a position; identifying a moving object matched with a target object with rapid speed and small size; adjusting the position of the target object on the frame image and an adjustment angle of a collection range so that the target object is kept in a central region of the collection range and the tracking for the target object with rapid speed and small size is realized. With the method, automatic tracking can be implemented and the practicabilityis strong.

The invention discloses a novel anti-scaling ultrasonic flow meter. The novel anti-scaling ultrasonic flow meter is characterized in that the lower end at the middle part of a flow meter tube section is provided with a vertical cylindrical hole, and the vertical cylindrical hole is internally provided with a disk-shaped reflecting antenna. The novel anti-scaling ultrasonic flow meter disclosed by the invention has the technical effects and the advantages that the flow characteristic of an ultrasonic flow sensor (tube section) is effectively improved, the metering accuracy and the maintainability of an ultrasonic heat meter are increased, on-site maintenance and replacement for the disk-shaped reflecting antenna can be carried out, the reliability is increased, the service life is prolonged, the centralized heating current situation of China is more suited, and the failure of the ultrasonic heat meter due to the scaling caused by a heat-supply water quality problem is solved; and with the implementation of a country building energy-saving meterage policy, the novel anti-scaling ultrasonic flow meter has an important significance in increasing the metering accuracy of a legal instrument for centralized water supplying and heat metering and improving the flow characteristic.

The invention relates to a double-sided Schottky controlled fast recovery diode device and a preparation method. The fast recovery diode device comprises a semiconductor substrate, the semiconductor substrate comprises an N-type substrate and an N-type buffer layer, and an active region is arranged in the central area of the N-type substrate. On the cross section of the diode device, the active region comprises a number of alternately distributed active P-columns and active N-columns. Anode metal is arranged on the N-type substrate. The active P-columns are in ohmic contact with the anode metal on the N-type substrate, and the active N-columns are in Schottky contact with the anode metal on the N-type substrate. A number of alternately distributed cathode P- regions and cathode N+ regionsare arranged on the N-type buffer layer, the cathode N+ regions are in ohmic contact with cathode metal, and the cathode P- regions are in Schottky contact with the cathode metal. Fast reverse recovery can be realized, the dynamic loss can be reduced, the excellent softness can be improved, and the device has high reliability.

The invention provides a design method of a synchronous motion transmission error curve and a spiral bevel gear using the transmission error curve. The synchronous motion transmission error curve of the invention has two tooth changing points, which means that the number of tooth changing impact is small; the slope of adjacent transmission error curves is very close to each other at the point of gear change, which means that the angular velocity of gear change is almost the same. The engaging-in and engaging-out points are close to the inflection point of the transmission error curve, and thesecond derivative is zero, which means that the inertial dynamic load is almost zero when the gear is changed. The synchronous motion of the adjacent transmission error curve between the engaging-in and engaging-out points means that the non-uniform coefficient of load distribution between teeth is minimized. The above characteristics will greatly reduce the load on the teeth and vibration and impact caused by gear change, improve the load distribution between the teeth, and further improve the transmission performance of spiral bevel gears.

In order to enable high speed, high bandwidth data transfer between two ASIC devices, for example in a backplane, a wide parallel input data word is divided into a smaller number of words, and each smaller word is converted to serial form and then transmitted over a respective sub-link at a high clock rate relative to the system clock. At the receiving side, the clock is recovered from the serial words, and the serial words are converted back to parallel form. An alignment process is then carried out, firstly involving detecting the positions of the bits of the words and then storing the words in a buffer FIFO register. The words are clocked out of the FIFO register in synchronism under control of the system clock once it is detected that valid words are received in the FIFO registers.

The invention relates to a preparation method of a high-strength waterproof easy plaster, and belongs to the technical field of building materials. According to the method, nano-silicon dioxide is introduced by a sol mode, dispersion of nano-particles can be improved, cement particles are rapidly hydrated once the cement particles contact with water, a pH (potential of hydrogen) value of cement and ion strength are rapidly increased, so that sol is rapidly gelatinized, a calcium hydroxide crystal in cement paste easily grows along crystal surface as silicon is doped into the sol, a gel formedafter gelatinization of the sol is provided a special dispersing system, nano-silicon dioxide particles are mutually linked to form a space net structure with nano-micro-holes, the sol is added, a hole structure of the easy plaster can be optimize, calcium hydroxide crystal particles are refined, the content of calcium hydroxide is reduced, and the content of the hydrated calcium silicate gel is improved, so that mechanical property and durability of the easy plaster are improved. The prepared high-strength waterproof easy plaster is good in infiltration resistance, high in compressive strength and excellent in bonding strength and has a wide application prospect.

The invention relates to an aircraft prediction and correction composite guidance method based on a sliding mode disturbance observer, wherein the method comprises the following steps: 1, building an aircraft three-degree-of-freedom nonlinear model containing multi-source disturbance according to the nonlinear kinematics and dynamics characteristics of a hypersonic aircraft, and carrying out representation of the multi-source disturbance; 2, designing the sliding mode disturbance observer to carry out rapid online estimation on lumped disturbance; 3, respectively designing a longitudinal guidance law and a lateral guidance law according to the flight state and control input of the aircraft at the current moment, and converting heat flux density, overload and dynamic pressure constraints into heeling angle amplitude constraints by using quasi-equilibrium gliding conditions and disturbance estimated values to ensure that process constraints are met; and 4, designing a composite guidance law according to the disturbance estimation value and the output value of the prediction correction guidance, and finally completing the design of the guidance method. The method is high in anti-disturbance capability, high in guidance precision and suitable for various types of hypersonic aircrafts without power reentry.

The invention discloses a large-diameter offshore wind power rock-socketed single pile excavating method. The large-diameter offshore wind power rock-socketed single pile excavating method comprises the following steps that immersion of a pilot shaft pile casing is carried out; a petroleum drilling machine is adopted for excavating a pilot shaft through the pilot shaft pile casing; a geological drill is adopted for drilling two to three rings of main blast holes and one ring of outline blast holes, and a casing off hole is lowered down; a dedicated CO2 phase change expansion crack pipe is mounted, the interiors of the main blast holes are mounted in a segmented manner, and the interiors of the outline blast holes are continuously mounted; a blast network is connected; a rock-socketed single pile steel pile casing is lowered down; mud and weathering sand between the pilot shaft pile casing and the rock-socketed single pile steel pile casing are sucked away; the pilot shaft pile casing and a drilling casing pile are pulled out; underwater slag cleaning is carried out; and concrete is poured to form a rock-socketed single pile foundation. Pilot shaft mechanical excavating and CO2 expansion rock breaking and expanded excavating are combined, the technical problem that a 2-4mm-diameter petroleum drilling machine and a common geological drill are used for finishing excavating of an offshore rock-socketed single pile foundation with the diameter being 8 to 10 m and above can be solved, the expansion pressure generated by a CO2 phase change is controllable, the explosion impact waves and the vibration speed are small, and the method is economic and environment-friendly.

This invention relates to a long gear superposition gear used in mechanical power actuating device, characterized in that its gear width is three times than the present gear width, and the moment strength a single gear can bear is nine times than the present gear. The design and manufacturing technique of the gear outline is simple with low cost, when it is used in the changeover speed gear of the mechanical power actuating device, it can save raw material above 60%.

A base station of a wireless communication system includes: a base station side data generation portion generating a number of sets of scramble data which are different from each other while the number of sets of the scramble data is the same as or more than the number obtained by multiplying the number of the sub-channels used in said overall wireless communication system by the number of the subcarriers; a base station side storage portion which stores the scramble data; a base station side upper layer control portion which outputs both transmission data for a terminal at other end of a communication and information of sub-channels; a base station side lower layer control portion which, based on the information of the sub-channels, controls the base station side storage portion to output scramble data corresponding to the sub-channels; a base station side scramble portion which conducts a multiplication operation between the transmission data output from the base station side upper layer control portion and the scramble data output from the base station side storage portion based on a control by the base station side lower layer control portion.

A trolley device is used to convey laminar elements. The trolley device includes at least one belt that defines a closed loop, a plurality of pulleys, at least one drive pulley being configured to act on the belt, the pulleys being mounted on a frame with a supporting region over which a section of the belt can be slid and wherein suction means linked to the belt are provided. The belt includes at least on the outer face thereof a projecting section of predetermined length that protrudes in height with respect to the rest of the belt, the projecting section being provided with a plurality of through holes aligned in position with through holes made in the belt.