132results about How to "Increase the speed of descent" patented technology

The invention relates to a base matrix, a encoder/decoder of Low Density Parity Check (LDPC) codes and a generation method thereof. The encoder/decoder is determined uniquely by the parity check matrix of the LDPC codes. With different code sizes, said parity check matrix can be obtained by expanding different base matrixes, and also can be obtained by expanding a unique base matrix after correction. Elements of said base matrix must meet an inequation in which the girth value is up to the standard, e.g. when girth ≧6, for any element i, j, k, l in the matrix which forms the short loop having a length of 4 in anticlockwise, there are always mod(i−j+k−l, z) unequal to 0. By this invention, the girth of the constructed base matrix is made as large as possible, the amount of the shortest loops is as few as possible when it is the same girth, thus the curve of bit error ratio (BER) is dropped quickly, the error floor of the LDPC codes is eliminated effectively, and the optimal performance of the LDPC codes is obtained.

The embodiment of the invention provides a luminance compensation method and a self-illumination display device, and relates to the technical field of display devices. According to the luminance compensation method and the self-illumination display device, attenuation difference of self-illumination elements in all areas after the self-illumination display device works for a long time can be reduced, and the lumpy mura phenomenon occurring after a displayer of the self-illumination display device works for a ling time can be avoided. The luminance compensation method comprises the steps of obtaining a pre-stored compensation factor table of the self-illumination display device, wherein the compensation factor table comprises compensation factors of N areas, the compensation factor of the area with the temperature higher than the temperature of a standard area is smaller than G, and the compensation factor of the area with the temperature lower than the temperature of the standard area is larger than G; compensating for the luminance of images displayed in all the N areas according to the compensation factor table. The luminance compensation method is used for compensating for the luminance of the self-illumination display device.

In a shift register circuit, a defective operation while an output signal is not outputted and a drive capability lowering while the output signal is outputted are prevented. A unit shift register comprises a first transistor for supplying a clock signal inputted to a first clock terminal to an output terminal, and the first transistor is driven by a drive circuit. A second transistor is connected between the gate of the first transistor and the output terminal and has a gate connected to the first clock terminal. The second transistor connects the gate of the first transistor to the output terminal based on the clock signal when the gate of the first transistor is at L (Low) level.

A capacity varying type rotary compressor comprises a casing (100) that maintains a discharge pressure state; a motor (200) installed in the casing (100) and generating a driving force; one or more cylinder assembly (300,400) fixed in the casing (100) and compressing a refirgerant by a rolling piston (340,430) and a vane (350,440), the rolling piston (340,430) eccentrically coupled to a rotation shaft (230) of the motor (200) and performing a linear motion; and a vane restricting unit (500) for restricting the vane (440) separated from the rolling piston (430) or releasing the vane (440) thereby contacting to the rolling piston (430) according to a difference of pressures applied to the vane (440). In the rotary compressor, an entire structure is simplified thereby to minimize precessing assemblies, resulting in reducing aproduction cost and enhancing a productivity. Furthermore, as the vane (440) is restricted by using a pressure difference of the system, a relibility is enhanced. Especially, in case of using a stopper (550), the reliability of the product can be more enhanced.

The invention claims an internal shrinking tensile rope parachute. The basic idea of the invention is as follows: using an internal shrinking tensile rope, which can be shortened after being aerated and can produce tensile force and can be prolonged after being stretched and can compress air, to replace the rope tape of the existing parachute system, or adding an internal shrinking tensile rope on the parachute system, and adding a set of air supply system and a sensing control system. Said replaced rope tapes comprise a parachute lanyard (1), a connection rope (2), a binding rope (3), a close rope (4) and so on. When the parachute system with said structure is used, the contraction and stretching of the rope tape is controlled to control the size of the tensile force produced by the rope tape so as to change the shape, position relationship and aerodynamic characteristic of the parachute system to further reduce overload produced on the parachute system, and change the motion speed and direction of the parachute system and reduce landing speed of air-dropped articles. The parachute system with said structure is added with new functions and can probably reduce weight of the parachute system.

The invention relates to the technical field of bolt chamfering machines, in particular to a fully automatic bolt chamfering machine. The fully automatic bolt chamfering machine comprises a loading mechanism, a material holding mechanism, a machine working table of a tool rest mechanism, an unloading mechanism and an electrical control system, and is characterized in that: a feeding outlet end of a sliding rail of the loading mechanism is connected with an inlet of a chuck of the material holding mechanism; the material holding mechanism is arranged on the machine working table; the machine working table in front of the chuck of the material holding mechanism is provided with the tool rest mechanism; and an electrical cabinet of the electrical control system is arranged inside the machine working table. The fully automatic bolt chamfering machine has the advantages that: the fully automatic bolt chamfering machine does not need manual processing of labors; from the bolt feeding to chamfering processing, the fully automatic bolt chamfering machine adopts automation completely and is controlled by PLC completely; the fully automatic bolt chamfering machine has quite high work efficiency and saves time and labor; moreover, the processed product has high precision.

A control system for hybrid construction machine includes: an operation valve for operating a boom; a variable displacement type fluid pressure motor; a distribution mechanism adapted to adjust a flow to be distributed to the fluid pressure motor; a motor generator adapted to be rotated integrally with the fluid pressure motor; a variable displacement type assist pump adapted to be rotated integrally with the motor generator; a distribution mechanism control unit adapted to control the distribution mechanism; a tilt angle control unit adapted to control tilt angles of the fluid pressure motor and the assist pump; and a motor generator control unit adapted to maintain a rotation speed of the motor generator at a target rotation speed. The target rotation speed at the time of boom regeneration control is set to higher than the target rotation speed in a case where only an assist control is carried out.

The invention particularly relates to a deep-well rescue robot applicable to narrow spaces and with strong passing capability, in-time rescue and convenience in carry and a rescue method. The deep-well rescue robot comprises an elliptical spherical-shell-shaped path finding body and a plurality of spherical-shell-shaped rescue bodies, wherein four-rotor or six-rotor type flying mechanisms are arranged at the corresponding positions of respective upper end surfaces of the path finding body and the rescue bodies; and the outer side surface of the path finding body is provided with two rows of supporting leg groups horizontally arranged in a ring shape along the vertical direction, and each row of supporting leg group comprises a plurality of automatically-telescopic folding type supporting legs. The rescue robot can realize flying movement or creeping movement under a well by means of the flying mechanisms or the supporting legs, is compact in volume and can meet underwater rescue; and the path finding bodies can realize elusion when descending and encountering obstacles, is strong in passing capability and is suitable for rescuing in the narrow spaces. When descending, the path finding body can draw a first-type deep-well map and a second-type deep-well map so as to be beneficial to increasing the descending speed and the ascending speed of the rescue bodies and the path finding body.

A plunger device for a hydrocarbon wellbore is provided that has replaceable modular components that allow the function of the plunger device to be altered. Concentric sleeves and short sleeves may be selectively disposed about a chassis of the plunger device. One or more short sleeves may be removed to expose an entrance aperture which allows fluid flow to enter an interior volume of the chassis and pass through an exit aperture in the chassis. This configuration allows the plunger to descend down a bore hole more rapidly. However, a well operator may determine that it is advantageous to keep the short sleeve on the chassis to block the entrance aperture. Thus, the weight of the plunger overcomes the pressure in the borehole, and the plunger descends more slowly down the borehole.

The invention relates to a multi-functional earthquake emergency response escape slide for a public building. The multi-functional earthquake emergency response escape slide comprises a slide body and a slide column, the slide body is arranged along the slide column, a plurality of support pieces extend from the slide column, and the slide body is connected with the slide column through the support pieces. The multi-functional earthquake emergency response escape slide for the public building uses the spiral slide as the body, the structure is simple, the design is smart, the space is saved, and the entertainment and guidance are strong when there is no disaster. By means of an isolating support and flexible connection, the escape slide is separated from the body structure, the shaking in an earthquake can be effectively reduced, the capacity input is reduced, the earthquake resistance performance is excellent, a cylinder-shaped slide-way accelerates the gliding speed of a survivor and improves the safety, the bottom layer is provided with a cushion and a protection shell, and the safety of the survivor is effectively protected. LED emergency lamps and vent holes good for escaping are arranged in the slide-way. When there is no disaster, the multi-functional earthquake emergency response escape slide can serve as an entertainment slide or an emergency response escape propagandizing facility for the government; the multi-functional earthquake emergency response escape slide is capable of being used for the earthquake, fire hazard and non-disaster conditions and suitable for the large public building and other densely populated places.

The invention aims at providing a synchronous double-valve electromagnetic control oil atomizer. The synchronous double-valve electromagnetic control oil atomizer comprises a synchronous double-valve electromagnet assembly, a pilot ball valve base, a steel ball, a control piston body, an oil atomizer body, a needle valve ejector rod, a needle valve reset spring base, a needle valve reset spring, a nozzle, a nozzle fastening nut, a needle valve and an oil atomizer head fastening nut. The synchronous double-valve electromagnet assembly structure is adopted, two pilot ball valves can be rapidly and synchronously controlled, the requirement for ball valve control flow and response can be met, the effect of the rail pressure change on the movement of the ball valves can be reduced, and the rapid response characteristic of the diesel engine total-working-condition oil atomizer is guaranteed. In addition, the structure of an axial cooling type iron core and a radial coil is adopted in the synchronous double-valve electromagnet assembly, the heat dissipation area of the coil and the iron core is increased, the interior of the iron core and the coil are well cooled, and good electric conduction performance, safety and reliability of the coil and good magnetic conduction performance of iron core materials are guaranteed.

The invention discloses a washing machine. The washing machine comprises a machine body, a door cover assembly and a damper, wherein the door cover assembly is arranged on the machine body and can rotate between a machine body opening position and a machine body closing position; the damper is arranged between the machine body and the door cover assembly, by means of the damper, the speeds of the door cover assembly comprises a first speed and a second speed when the door cover assembly rotates from the opening position to the closing position, and the first speed is higher than the second speed. According to the washing machine, the damper is arranged between the machine body and the door cover assembly, so that the door cover assembly can have a higher descending speed in front-section travel during descending, and accordingly, the descending time of the door cover assembly can be shortened.

The invention discloses a roller cutting grinding mill automatic feeding device capable of enabling materials to be free of remaining. A transmission device comprises a belt (3), belt wheels (2) and feeding clamping grooves (1) fixedly connected with the belt (3); the feeding device comprises a first stock bin (4) connected with the feeding clamping grooves (1) and a feeding pipe (5) fixedly connected with a discharging opening of the first stock bin (4); a discharging opening of the feeding pipe (5) is fixedly connected with a feeding opening of a second stock bin (6), and a plurality of second stock bin discharging openings (61) are formed in the side face of the second stock bin (6) and are fixedly connected with corresponding discharging pipes (8) respectively; and discharging openings of the discharging pipes (8) are connected with U-shaped annular grooves (9) respectively. According to the device, materials can be automatically fed into the feeding device, and it also can be ensured that the phenomenon that the materials are stacked in the stock bins, and the materials cannot smoothly slide is avoided; a machine tool can effectively run, and feeding efficiency and stability are ensured; and workloads of an operator are reduced, and the production efficiency is improved.

The invention discloses an MOSFET/IGBT high-speed driving circuit based on linear optical coupling isolation. The high-speed driving circuit utilizes a variable resistance structural circuit on a collector or an emitter of a linear optical coupler and adopts a dynamic voltage comparing circuit on an output loop of the optical coupler, so that the transmission speed of a driving signal and the gradient of a rising and falling edge are improved, and thus the performance of the driving circuit is improved. The high-speed driving circuit has the advantages of fast high-speed driving speed, small volume and the like.

The invention provides a hybrid cooling system for a ground transformer of a substation. The hybrid cooling system comprises a transformer, a base and a frame platform, wherein the base is used for supporting the transformer, the frame platform is arranged on ground around the transformer, a circle of pressure pipeline is arranged around the transformer and on the frame platform, the pressure pipeline communicates with a water supply mechanism, a travelling mechanism is arranged on the frame platform and is corresponding to the pressure pipeline, an atomization spraying mechanism is arranged on the travelling mechanism, a plurality of L-shaped connection pipelines are vertically arranged on the pressure pipeline, the atomization spraying mechanism is matched with the connection pipelines,a temperature monitoring mechanism is arranged on the pressure pipeline and is corresponding to the transformer, an equipment groove is formed in a part below the frame platform, an acceleration heatabsorption mechanism is arranged in the equipment groove, and a spraying monitoring mechanism is arranged between the transformer and the pressure pipeline and is corresponding to the connection pipelines. By the hybrid cooling system, the transformer temperature can be automatically detected, spraying atomization cooling is performed on a high-temperature region, heat absorption and evaporation of water mist are accelerated by wind, the cooling speed of the transformer is greatly increased, and the safety during running of the transformer of the substation is improved.

The invention belongs to the technical field of rare earth concentrates, and particularly relates to a rare earth concentrate treatment method. The method comprises the following steps: roasting: sodium carbonate and the rare earth concentrates are mixed, the mixture is put into a rotary kiln for roasting to form a roasted product, and the ratio of the rare earth concentrates to sodium carbonate is 1:(0.2-1):0.3. With adoption of a screening and grinding mode, materials with the particle size meeting the requirement are not ground any more, the grinding time is saved, meanwhile, the materialsare intermittently unloaded from the bottom of a material box, the materials which are unloaded once can be ground under swinging of grinding rollers once or multiple times, and blockage of the innerwall of a grinding groove body and the material leakage slits in a grinding plate is prevented; and besides, a small quantity of the materials are unloaded and slowly moved downwards through a distributing plate, a decelerating function for the materials can be achieved, compared with a traditional mode that the materials are added at a time to cause dust flying, the design enables the material flying amount to be smaller, dust pollution can be reduced, and material waste can be avoided.

The present invention discloses a synchronizing signal detection method based on a second-order low-pass wave trap. The advantages of the present invention are that: 1 the noise attenuation speed is increased based on a second-order filter and the wave trap, thereby greatly improving a system cut-off frequency, reducing a detection phase shift and improving a system dynamic response speed; 2 a reference frequency and a filter parameter are adjusted dynamically by SOGI-PLL, thereby satisfying the detection requirement for the power grid frequency large-range change. Compared with a conventional single-phase synchronizing signal detection technology, the structure and the parameter design of the new method are simplified substantially, and the theory and experiment show that the synchronizing signal detection method of the present invention has the satisfied detection accuracy and dynamic response on various power grid working conditions.

The invention provides a cement telegraph pole branching frame, and belongs to the technical field of telegraph poles. The telegraph pole branching frame solves the problem that the service life of the telegraph pole branching frame is shortened when external force applied to cables is increased. The cement telegraph pole branching frame comprises a telegraph pole body with openings in the upper end and the lower end, a cover plate mechanism is arranged at the opening in the upper end of the telegraph pole body, supporting mechanisms triggering the cover plate mechanism to work are arranged atthe left end and the right end of the cover plate mechanism, and the two supporting mechanisms are distributed in a bilateral symmetry mode relative to the center line of the telegraph pole body. Andtwo guide mechanisms are arranged on each supporting mechanism. The cement telegraph pole branching frame is safer to use and longer in service life.

The invention discloses a material grinding bin suitable for a roller cutting attritor. The material grinding bin comprises a bin body, a pressure reducing chamber and a wind pipe, wherein a discharge port of a feed pipe in the bin body is connected with a feed port of a bin; the bin is fixed on a rotating shaft; at least one bin discharge port is formed in the side surface of the bin, and is fixedly connected with a discharge pipe; a discharge port of the discharge pipe is connected with a U-shaped annular groove; the bin adopts a cylindrical structure with regularly polygonal top and bottom; all side surfaces of the bin are rectangular; the bin discharge ports are respectively positioned on all the rectangular side surfaces of the bin; a cone with the bottom surface of the bin as the bottom surface is arranged in the bin, and is lower than the bin; and preferentially, the peak of the cone is positioned in the body center of the bin. One cone is arranged in the bin for accelerating the material gliding speed to prevent the material accumulation caused by the material gliding not in time; and after the blanking is stopped, materials in the bin can totally enter the U-shaped annular groove without needing manual cleaning.