31results about How to "Small error" patented technology

The invention relates to a multi-source data-based urban land space information identification method which comprises the following steps of: firstly, constructing a resident settlement index through night light and a vegetation index; meanwhile, interpreting urban land information by using high-resolution satellite remote sensing images in partial regions to obtain accurate settlement percentage data; based on the two sets of data, establishing a regression model of the resident settlement index and the settlement percentage data, inverting settlement percentage data in all regions by using easily available resident settlement indexes and obtaining settlement data according to the settlement percentage data and the night light; finally, processing the settlement data on the bases of standard urban land area statistical data. According to the multi-source data-based urban land space information identification method, rapid calculation is carried out by using the easily-available low-resolution data such as the night light and the vegetation index and the error between the identified urban land area and the standard urban land area statistical data is very little, thus space information of urban land can be rapidly and accurately obtained.

The invention relates to a camshaft adjuster (1) for adjusting and fixing the relative position of the angle of rotation of a camshaft (8) in relation to the crankshaft of a reciprocating piston internal combustion engine. Said adjusting device comprises a high transmission and friction-reduced adjusting gear mechanism (2), comprising a drive shaft which is rotationally fixed to the crankshaft, a driven shaft which is rotationally fixed to a camshaft (8) and an adjusting shaft (9) which is connected to an adjusting motor shaft (10) of an adjusting motor. A camshaft adjuster (1), which is economical to run, can be produced such that the adjusting gear mechanism (2) and the adjusting motor (3) are embodied as separate units and are connected together by a rotational backlash-free, disengaging clutch (4).

Reception beamforming that does not generate discontinuity in the vicinity of the depth of a transmit focus is executed even if reception scanning lines are disposed outside of the irradiation area of a focusing-type transmission beam. The degree of discontinuity showing the discontinuity of reception signals detected by plural ultrasound elements 105 or the degree of discontinuity regarding the discontinuity of the wave fronts of phased signals is detected by a discontinuity extracting unit 113. If there is an area where the degree of discontinuity is larger than a predefined value, a delay time generating unit 114 for discontinuity elimination changes the delay times in the area where the discontinuity is generated.

The invention discloses a conveniently overhauled crane carriage for a crane. A movable maintenance platform is arranged on the crane carriage. A crane carriage frame comprises two walking beams and a bearing beam which are arranged in an I shape. The two ends of each winding drum are arranged on two winding drum fixing bases respectively. A dedicated monitoring device comprises an installing frame composed of two fixed segments and a horizontal segment. A driving chain wheel, a driven chain wheel and a chain are arranged in the horizontal segment, a horizontal mobile platform is fixed to the chain, and a rotary mobile platform is rotationally connected to the horizontal mobile platform. According to the conveniently overhauled crane carriage for the crane, the crane carriage can be produced through a modularized assembling mode and has the advantages of being simple in structure, few in welding point and light in self weight, welding portions can be decreased effectively at the same time, and the situation that the errors of crane carriage wheel lines are too large due to welding deformation is avoided; in addition, whether the surface of a main beam has deformation or cracks or the working conditions of driving wheels and driven wheels can be monitored in real time through a camera, and meanwhile the overhauling efficiency is improved.

A plunger pump power control device and a control method thereof. The device comprises a valve body, a valve core, a valve sleeve, a stop plug, a spring pre-loaded mechanism, a feedback mechanism and a slide valve. The slide valve is provided within one end of the valve core. The stop plug is provided at one end of the valve body, and the spring pre-loaded mechanism is provided at the other end of. The valve sleeve, the valve core, and the slide valve are provided between the stop plug and the spring pre-loaded mechanism, and the feedback mechanism is hinged on the valve body. The device enables the hydraulic plunger pump to control the output power, the pump power output is simulated by two broken lines, and the error is less. It is flexible to load variable by the valve core through the pressure of the C-cavity.

The invention relates to a gas cutting series combined tool, which comprises a linear cutting device, a circular arc cutting device and a beveling cutting device, wherein a longitudinal trolley of the linear cutting device consists of a front slide block and a back slide block; the front slide block and the back slide block are symmetrically welded and fixed on the two ends of the lower side of the longitudinal center of an operation platform, and is arranged on a rail; weight balancing plates are symmetrically welded at the left side and the right side of the operation platform; balancing rolling wheels are arranged under the weight balancing plates through a support wheel and wheel shafts; the bottoms of the two balancing rolling wheels are in contact with a workpiece steel plate on the same horizontal plane; a left group of upright posts and a right group of upright posts used for positioning and fixing transverse cutting torches are arranged in the transverse center position on the operation platform; clamping screws and elastic clamp sheets used for fixing the transverse cutting torches are arranged on the upright posts; the rail is tightly clamped on the surface of the workpiece steel plate through magnetic blocks; a moving support frame and a supporting support frame are arranged at one side of the operating platform; the two sides of one end of the moving support frame are rotatably connected with the operation platform through pin shafts; the beveling cutting device is fixed on the operation platform of the linear cutting device.

The invention provides a high-conductivity writing type conductive gel pen ink. The high-conductivity writing type conductive gel pen ink is composed of the following components by mass: 1 to 2 partsof formamide, 1 to 2 parts of ethanolamine, 4 to 16 parts of acrylic resin, 1 to 7 parts of conductive carbon black, 3 to 10 parts of graphite, 1 to 10 parts of a dispersant, 10 to 60 parts of water,1 to 3 parts of an antifoaming agent, 0.1 to 0.8 part of xanthan gum, 10 to 20 parts of propylene glycol methyl ether and 10 to 50 parts of carbon nanotube with a solid content of 5 parts. The high-conductivity writing type conductive gel pen ink provided by the invention has the advantages of low cost, strong adhesion force, excellent electrical conductivity, rapid forming at a normal temperature, smoothness in writing, insusceptibility to pen plugging and easy storage trough organic combination of the above-mentioned components, is specifically applicable to application in writing by being perfused into a conventional gel pen, and meets the increasing demands of the market.

The invention provides a writing type conductive gel pen ink. The writing type conductive gel pen ink is composed of the following components by mass: 1 to 2 parts of formamide, 1 to 2 parts of ethanolamine, 4 to 16 parts of acrylic resin, 1 to 7 parts of conductive carbon black, 3 to 10 parts of graphite, 1 to 10 parts of a dispersant, 30 to 70 parts of water, 1 to 3 parts of an antifoaming agent, 0.1 to 0.8 part of xanthan gum and 10 to 20 parts of propylene glycol methyl ether. The writing type conductive gel pen ink provided by the invention has the advantages of low cost, strong adhesionforce, excellent electrical conductivity, rapid forming at a normal temperature, smoothness in writing, insusceptibility to pen plugging and easy storage trough organic combination of the above-mentioned components, is specifically applicable to application in writing by being perfused into a conventional gel pen, and meets the increasing demands of the market.