79 results about "Normal height" patented technology

A medical device and its use are described. The device is useful for replacement or treatment of a diseased or damaged intervertebral spinal disc. The device has volume to occupy space between vertebral bodies, has mechanical elasticity to provide motion between vertebral bodies, and sufficient strength to withstand the forces and loads on the vertebra. The device may have modifications to allow for attachment to the bones of the vertebrae. The device may also contain modifications for ease of placement in the anatomic space between vertebral bodies. The device may be constructed to expand to restore the normal height of the intervertebral space.

An inlet is adapted to receive pressurized gas from a CO2 gas cartridge. A variable compression member has a normal height, under normal operating temperature conditions, adapted to provide a normal compressive force between the gas cartridge and the inlet to effectively seal the gas cartridge to the inlet. The variable compression member also has a reduced height, under heightened temperature conditions, adapted to provide a reduced compressive force between the gas cartridge and the inlet to allow pressurized gas to escape between the gas cartridge and the inlet. A seal member is compressed between the gas cartridge and the inlet. The inlet may be part of a pneumatic dispensing device. The gas inlet is in fluid communication with a gas enclosure to enable pressurized gas delivered through the inlet to provide a dispensing force on a product cartridge to cause dispensing of the viscous product.

A water craft includes a tow tower including a tower loop raised and lowered by two linear actuators. The tower loop is firmly supported in the raised position by the linear actuators to provide a proper attachment for towing enthusiasts, and is lowered to allow the water craft to be stored in a normal height garage structure. The linear actuators are unique designs with large shaft diameter, short stroke, and high overlap between the shaft and actuator body, and in particular include novel compressible bumpers to create a compressive jam-lock counterforce at full extension to effectively jam-lock the linear actuator and prevent back creep.

It is intended to provide an electronic component mounting device and an operation performing method for mounting electronic components so that both the operation quality and the productivity can be improved. Height precision division information that divide the height precision required for up and down movements of operating heads into the first division which indicates a normal height precision and the second division which indicates that a high height precision is required based on the type of electronic components are stored as operation data beforehand. In operation performing procedures, when an electronic component belongs to the first division, an operating head is made to move up and down based on an approximate operation position height derived from an approximate curved surface of the top surface of a board which is calculated by using the height measurement result obtained by measuring a plurality of height measuring points on the surface of the board, and when the electronic component belongs to the second division, the operating head is made to move up and down based on an individual operation position height obtained by individually measuring the board height at the operation position.

The invention provides a GPS leveling height transfer method, which comprises the following steps of: S1: creating a regional gravity quasigeoid model based on the Molodensky theory according to ground gravity observation data by combining with a regional digital terrain model and a global gravity field model; S2, obtaining a reference system difference between a GPS geodetic height and a leveling height and a height anomaly correction term influenced by the reference system difference through a GPS leveling overdetermined boundary value method, and creating a practical quasigeoid model according to the gravity quasigeoid model, the height anomaly correction term and the preset GPS leveling height anomaly system deviation; S3, obtaining a normal height of a pointed to be measured of a region to be measured according to the gravity observation data and the practical quasigeoid model. The method can implement that the GPS leveling replaces a trigonometric leveling or a conventional leveling to meet the transfer accuracy of a two-stage leveling height difference.

The invention discloses a region quasi-geoid refining method based on CQG2000, including the followings: step one, the CQG2000 is used as a platform, and GPS leveling data is used for determining the quasi-geoid model of the region to be measured according to remove-fit-restore method; step two, GPS system is used for obtaining the real-time geodetical coordinates of any unknown point in the region to be measured, and measured data are transmitted to an arithmetic and control unit that uses the constructed region quasi-geoid model to convert the measured GPS geodetic height of the known point into normal height, i.e., leveling height, in real time. The method is simple and convenient to be carried out, the measured data are accurate and reliable, and the measurement speed is quick, thereby being capable of efficiently solving the problem of geoid fitting defect caused by no gravity data obtained when the quasi-geoid is refined and the problems of complicated measuring processes and big measuring cost when gravity data is used for refining, greatly improving the precision and resolution factor of quasi-geoid and having very high use value.

The invention discloses a multi-temporal imaging island shoreline surveying method, and relates to the technical field of geodetic surveying and surveying engineering. The method comprises the following steps: collecting and processing image data of an island to form a shoreline image database; collecting and processing water level observing data of the island; according to the shoreline image database and the water level observing data, computing the normal height of the shoreline of the island; according to the shoreline image database, selecting part of a shoreline and establishing a beach digital elevation model of the island; and according to the water level observing data, the normal height of the selected shoreline and the beach digital elevation model, acquiring the planar position of the shoreline of the island. In the multi-temporal imaging island shoreline surveying method, the shoreline image database is established through multi-source image data of the island, and in combination with the water level observing data of the island, the normal height of the shoreline is computed, and thus, the planar position of the shoreline of the island is acquired. Compared with the conventional method, the multi-temporal imaging island shoreline surveying method has the advantage that the shoreline extracting efficiency and the shoreline extracting precision of the island are effectively improved.

Improvement in Combination bed (4) and desk (3) is disclosed: an articulated parallelogram (6, 8, 10, 11) based system and mechanism that links bed frame (4) and desktop (3) to elements (6, 10) fixed to a wall (or support or furniture body). Bed rotates as a wallbed, and desktop goes down and up always leveled. In raised position, bed lies against the wall, bedding concealed, and cantilever desktop at standard height rests against bed bottom. In the lowered position, the bed is deployed at normal height and desktop goes underneath at floor level. Desktop can admit objects as a PC monitor (up to 0.4 m height) that can remain undisturbed through conversion and stowing.

The invention relates to a network RTK (Real-Time Kinematic) positioning method for obtaining coordinates and normal height of a reference-ellipsoid-centric coordinate system in real time. Source nodes are expanded and are used for transmitting the demand of a moving station in a more detailed manner, the NTRIP (Networked Transport of RTCM via Internet Protocol) is not required to be modified, judgment and an algorithm are only required to be correspondingly added into NtripCaster software or an NtripProxy relay module is only required to be added between NtripCaster and the moving station, and the method is easy to realize; if the coordinates of the reference-ellipsoid-centric coordinate system are required to be obtained in real time, the corresponding source node is only required to be selected during logging-in to a server, non-secret-involved seven parameters are filled in a handbook and other operation modes are unchanged; if the moving station needs to obtain the normal height, the corresponding source node is only required to be selected during logging-in to the server and other operation modes are unchanged; and on the premise that the state privacy policies are complied, the goals of measuring and staking out the coordinates and the normal height of the reference-ellipsoid-centric coordinate system in real time are realized.

The invention provides a laying method and a device of an engineering control network. The laying method of the engineering control network comprises the steps that a GPS (global positioning system) control network point is selected in a measurement control area; normal height h of the GPS control network point is acquired according to geodetic height H' of the GPS control network point relative to a reference ellipsoid and height anomaly zeta 2008 of the GPS control network point; a horizontal control point is selected in the measurement control area; horizontal constraint adjustment is performed on a GPS control network by utilizing an engineering application coordinate of the horizontal control point; an engineering application horizontal coordinate of the GPS control network point is obtained; and engineering construction treatment is performed according to the normal height h and the engineering application horizontal coordinate of the GPS control network point. According to the method and the device, the horizontal coordinate and sea level elevation can be obtained in the same GPS control network.

The invention relates to a method for improving a yield of continuous casting molten steel. The method comprises steps of (1) forwardly moving an tundish retaining wall, (2) spraying a repairing material to a slag line position of the tundish retaining wall, (3) constructing a slag overflow groove in a tail part of the tundish, (4) adjusting molten steel flow via a sliding plate during casting, closing the sliding plate when slag is discharged and then re-opened after five to eight seconds, and repeating the work until the molten steel of a large pack is fully cast into the tundish, (5) increasing a flow of the large pack casting molten steel via adjustments of the sliding plate, arising a molten steel liquid level of the tundish, timely discharging steel slag via the slag overflow groove,decreasing the molten steel flow after the slag discharging work is finished, so the molten steel liquid level of the tundish can restore to a normal height, and (6) repeating the step (4) and step (5) until the whole casting process is completed. The tundish structure is improved, the sliding plate is controlled during a large pack casting process and the slag of the tundish is timely discharged, so the molten steel yield can be greatly improved.

A method based on NTRIP for measuring an RTD of an arbitrary coordinate system result carries out extension on a source node, is used for conveying moving station requests with details, does not need to modify NTRIP, and simply needs to add judgments and algorithms to NtripCaster software, or adds an NtripProxy relay module between NtripCaster and a moving station. A coordinate under a reference-ellipsoid-centric coordinate system needs to be acquired in real time, a corresponding source node simply needs to be selected when a server is logged in, and non-secret seven parameters are filled in a handhold notebook. If normal height needs to be acquired in real time, a corresponding source node simply needs to be selected when the server is logged in. If ECEF coordinate needs to be obtained in real time, a corresponding source node simply needs to be selected when the server is logged in. An operating mode is basically unchanged, under the premise that a privacy policy is met, the reference-ellipsoid-centric coordinate system and the normal height of real-time survey staking of the RTD can be achieved, and surveying and mapping production efficiency is remarkably improved.

The invention discloses a method for rapidly measuring the precision coordinate and the elevation of a ground point in an area with weak CORS signals or without CORS signals and belongs to the field of geodetic surveying. In the area with weak CORS signals or without CORS signals, the effectiveness, the stability, and the precision of CORS technology cannot satisfy the requirement of actual production. Accordingly, the invention provides the method for rapidly measuring the precision coordinate and the elevation of a ground point in an area with weak CORS signals or without CORS signals. The method comprises: acquiring the coordinate, in an ITRF framework, of a ground point at an average observation epoch moment by means of a method combining static measurement with dynamic measurement; acquiring a precise national CGCS2000 coordinate by using datum transformation; acquiring a full-frequency-domain quasigeoid model with a certain resolution by using data of earth gravitational field models with different precisions and resolutions, digital terrain models, and a certain amount of optimized GNSS / benchmark so as to achieve elevation transformation and the normal height of the ground point. The method has characteristics of fast speed, high precision, and good stability, and has a high application value.

The invention relates to a CORS (Continuously Operating Reference Stations) system-based real-time positioning service method for local coordinates. The method has the beneficial effects that the encryption of seven real ellipsoid conversion parameters is realized by adopting a custom ellipsoid encryption method and the influence of the encryption method on RTK (Real-Time Kinematic) positioning istaken into account to strictly control the offset at the same time; the ellipsoid parameters are converted by adopting an ellipsoid deformation method, thereby eliminating the projection high parameters and solving the contradiction that the projection high parameters cannot be broadcasted in RTCM (Radio Technical Commission for Maritime services) message; generating a grid around a user positionby using the user position as the center, interpolating elevation abnormal values of grid points by using an existing elevation conversion model, generating RTCM residual grid message and broadcasting to the user end, thereby obtaining the normal height of the user end, solving the elevation conversion problem and not affecting the RTK baseline solution at the same time; and by implementing the method disclosed by the invention, after the user terminal receives pseudo conversion parameter message, the Gaussian plane coordinates and the normal height can be directly obtained with no need for configuring any parameters, thereby guaranteeing the security, the real-time performance and the universality of the local coordinate positioning.

When a substrate is transferred by a holding arm to a multiple tier wafer boat, contact between the holding arm and the substrate is prevented. When the wafer boat is not subjected to a thermal effect, a normal height position of a ring member is obtained by relatively elevating and lowering a transfer base member with respect to the wafer boat. Before a wafer, which is not yet thermally processed, is transferred to the wafer boat, a height position of the corresponding ring member is obtained. By comparing a difference between the normal height position of the ring member and the height position of the ring member before the wafer is transported, with a threshold value, whether to transfer the wafer by the wafer transfer mechanism to the wafer boat can be judged.

The invention discloses a dynamic lumbar vertebra fixing system. The dynamic lumbar vertebra fixing system comprises a dynamic rod (1), and at least two pedicle screws (2) connected to the dynamic rod (1), wherein the upper part of each pedicle screw (2) has a cavity; a screw bolt (3) is arranged in the cavity and is in threaded connection with the pedicle screw (2); the dynamic rod (1) passes through the cavity in the upper part of the pedicle screw (2); the screw bolt (3) in the cavity presses the dynamic rod (1); the dynamic rod (1) is a hollow rod; an elastic core shaft (1-2) is inserted into a hole of the dynamic rod (1); at least one section of lead screw part (1-1) of which the diameter is larger than those of two sides is arranged on an excircle of the dynamic rod (1); and more than one circles of lead threads (1-1-1) are arranged on the lead screw part (1-1). The dynamic lumbar vertebra fixing system can return a lumbar segment to a normal three-dimensional line and keep the normal height of a lumbar disc well, allows the limited movement of a spinal column and well accords with the physiological stability of the spinal column, so that the effects of relieving pains and preventing regression of neighboring segments are achieved.

The invention provides an arc rough surface modeling method with multi-scale parameter coupling. By defining the associated three-dimensional rectangular coordinate system and cylindrical coordinate system, an ideal smooth circular arc surface is generated and meshed, and the surface is flattened and projected into a plane. Based on the smooth continuity and periodicity of double sinusoidal waveform surfaces, a large-scale grid is used to control the normal height of the macroscopic matrix and the amplitude of the double sinusoidal waveform surface, and small-scale grids control the smooth continuity of two sinusoidal surfaces. Through coordinate transformation and point cloud technology, the parameters of ideal smooth circular arc surface, the normal height of the macroscopic matrix and the amplitude of the double sinusoidal wavefront are coupled with each other, and the multi-scale coupled circular arc rough surface is generated by parametric programming in the finite element software. On this basis, the elastic-plastic contact characteristics of the circular arc rough surface and related engineering problems can be further analyzed, and the multi-scale coupling modeling problembetween the macro-structure parameters of the circular arc surface and the micro-surface topography parameters of the contact surface can be solved emphatically.

The invention discloses a system for realizing water level prediction based on a GRU network. The system comprises a construction module, a training module and a verification module, the constructionmodule is used for constructing a GRU network model based on the GRU; the training module is used for collecting water level and rainfall information and inputting feature vectors corresponding to thewater level and rainfall information into the GRU network to achieve training of the GRU network model; and the verification module is used for inputting test data into the trained GRU network modeland predicting the height of the water level through the trained GRU network model. The height of the water level can be accurately predicted, early warning is achieved in advance, countermeasures aretaken in advance, the water level of the water area is made to be at the normal height, and life safety and property safety of people are guaranteed.

The invention relates to ventilation and fire protection in track traffic, in particular to a subway platform ventilation and smoke removal distribution structure in a station with an opened-closed system. The subway platform ventilation and smoke removal distribution structure is characterized in that a smoke removal pipe is externally connected with an air supply pipe, the air supply pipe is communicated with a small air removal chamber by the smoke removal pipe, and a control valve is arranged at the connecting part of the smoke removal pipe and the small air removal chamber. The subway platform ventilation and smoke removal distribution structure has the advantage that as the arranged smoke removal pipe is communicated with the air supply pipe, an air (smoke) removal fan can carry out uniform smoke removal on a station platform by the smoke removal pipe and the air supply pipe. The reconstruction cost of the platform is reasonable; and the structure can be adopted under the conditions that the station construction can be influenced by conditions such as piping and the like, the height of the platform can not reach the normal height, a space does not exist for arranging an upper air removal pipe in a rail area, or an upper air removal pipe of a running subway is damaged, and the repair difficulty of the air removal pipe is extremely large due to the influence of a contact network and normal running requirements, so that the air flow composition for normal ventilation and fire hazard smoke removal of the station can be met simultaneously.

The invention provides a test bed for a hydraulic oil pumping device, and relates to auxiliary equipment used for the oil pumping device. The test bed for the hydraulic oil pumping device comprises a machine frame. The machine frame is in a rectangular frame structure, a hydraulic cylinder installation base is fixedly connected with one side of the machine frame, and a hydraulic cylinder is vertically arranged in the hydraulic cylinder installation base. A piston rod of the hydraulic cylinder extends downward into a cavity of the hydraulic cylinder installation base, a turning pulley is arranged near the bottom of the cavity of the hydraulic cylinder installation base and is fixedly connected with the machine frame, and a pulley block is arranged at the top end of the machine frame. A steel wire rope is connected with the end, extending into the cavity of the hydraulic cylinder installation base, of the piston rod of the hydraulic cylinder, and the steel wire rope is anticlockwise winded on the turning pulley and the pulley block, and the tail end of the steel wire rope is connected with a loading basket which is arranged in a frame of the machine frame. Loading weight is arranged in the loading basket, manufacture cost of the test bed is effectively reduced, and various loads and wells with different depths can be simulated. An oil cylinder and a main machine can be tested simultaneously or independently, and indoor operation can be carried out in a workshop with normal height.

The invention discloses a cutting edge gap back milling cutter numerical control machining method, which comprises the following steps: (1) inputting a geometry and a cutter, and setting machining parameters; (2) calculating an upper cutting edge; (3) offsetting the cutting edge to obtain a final lower cutting edge; and (4) calculating a blade gap back milling cutter machining cutter path based on the lower cutting edge. The method has the advantages that: 1, the method provides the key for cutting edge gap back milling cutter numerical control machining, and ensures the normal height of the cutting edge so as to ensure the machining precision; 2, the method has simple operation, flexible parameter input and wide application range; and 3, when the cutter path is calculated, factors such as chuck interference, tool bit interference, corner deceleration, smoothening treatment on taper angles and the like are comprehensively considered, and the most reasonable cutter path is generated on the premise of safety. The invention finally realizes high-efficiency and precise cutting edge gap back milling cutter automatic numerical control machining.

The invention belongs to the technical field of photogrammetry, and particularly relates to a Find position-based image control point elevation precision cloud computing conversion method. The methodcomprises five steps of geodetic coordinate find position acquisition, precision elevation fitting cloud conversion, calculation report output, self-learning and training promotion and conversion result use. A B / S architecture private cloud computing mode is adopted to realize centimeter-level cloud computing elevation conversion from geodetic height to normal height of continuous operation reference station CORS services such as find position, the procedure of joint measurement of national standard points or establishment of a basic control network is omitted in image control point operation,and the cost and the construction period are saved.

The invention provides a keyboard and an assembling method for the keyboard. The keyboard comprises a key cap, a scissors type support frame, a movable device and a fixed device. The key cap is supported by the scissors type support frame. The scissors type support frame at least comprises a first part and a second part, wherein the first part is at least provided with a first pin joint part, and the second part is at least provided with a second pin joint part. The movable device is connected with the first pin joint part, and the fixed device is connected with the second pin joint part. When the movable device moves, the first pin joint part is driven to move away from the second pin joint part or come close to the second pin joint part. The two parts of the scissors type support frame are respectively installed on different devices, the key cap is pressed downwards or lifted upwards through movement of one device, and the height of the keyboard is reduced when the key cap is pressed downwards, so that the aim of being ultrathin of the keyboard is achieved. The keyboard is in the normal height again when the key cap moves upwards, so that a good hand feeling of the keyboard is guaranteed.

The invention discloses a bridge capable of automatically adjusting the height along with the rising of the river water level and a construction method thereof. The bridge is composed of a main beam and an approach bridge; the main beam is composed of a group of closed main beam box bodies, the front end and the rear end of the main beam box bodies are erected on a pier through supports capable ofautomatically adjusting the height through buoyancy of water; the upper ends of approach bridge plates of the approach bridge are hinged to the end parts of the bridge plates of the front main beam box body and the rear main beam box body of the main beam bodies, and the lower ends of the approach bridge plates can slide in supporting plate sliding grooves in a approach bridge bearing table through sliding wheels B. The construction method comprises the steps of manufacturing the main beam box bodies, manufacturing a lifting device, installing the main beam box bodies to form the main beam, constructing the approach bridge plates and the like. The bridge can automatically adjust the height along with the water level of rivers, has a self-locking function, the bridge not only cannot be submerged when the water level rises, but also can not bumpy along with the fluctuation of the water level up and down; and the normal height of the main beam can be recovered after the water level is reduced; and the bridge does not need too high piers, and the engineering cost is relatively low.

The invention discloses a healthy multifunctional study desk which comprises a movable face plate, a desk bucket, lifting regulators, desk corner steel tubes and a connecting rod, wherein the movable face plate is arranged above the desk bucket; the movable face plate is connected with the desk bucket by an angle regulator, so that freely overturning can be realized; the left side and the right side of the desk bucket are respectively connected with the desk corner steel tubes by the lifting regulators; each lifting regulator comprises a lifting inner tube, a lifting outer tube and a fixing device, the lifting inner tube is fixed in the lifting outer tube by a fixed plastic sleeve, and the fixing device is connected with the outer side of the lifting outer tube; the two ends of each desk corner steel tube are respectively provided with a corner sleeve, and the lower end of the corner sleeve is provided with a balance adjustment screw; the two desk corner steel tubes are available; and the two lifting regulators are connected with each other by the connecting rod. The healthy multifunctional study desk adopts the unique movable face plate, desk bucket and lifting regulators, so that the best comfortable proportion can be adjusted according to the normal height of a child when the child writes; and therefore, the healthy sitting posture of the child can be effectively specified, and the child can study healthily and happily.