34results about How to "Reduce the degree of offset" patented technology

The invention provides a multiport back-to-back DC-DC converter which comprises a DC system, a converter, an AC transformer, an AC circuit breaker and a common AC bus. One side of the converter is connected with the DC system through a DC line, and the other side of the converter is connected with the common AC bus through the AC transformer and the AC circuit breaker. According to the multiport back-to-back DC-DC converter, multiple DC lines with the same voltage class or different voltage classes are interconnected through two-level DC-AC-DC exchange, DC fault partition isolation is achieved through reasonable control, the cost of the transformer is saved, the safety performance of the DC-DC converter is improved, and the operation safety stability of an entire DC power grid is improved.

The invention provides an Nb oxide based gating device. The device comprises a bottom electrode, a conversion layer and a top electrode from bottom to top sequentially, wherein the bottom electrode isTiN or conductive glass; the conversion layer is Nb oxide; the top electrode is Pt. Nb oxide as the conversion layer, TiN or the conductive glass as the bottom electrode and Pt as the top electrode constitute the Nb oxide based gating device with excellent electrical stability. Experimental results prove that the deviation degree of an obtained curve is small when the gating device is tested circularly for 100 cycles, which proves that the gating device has excellent electrical stability.

The application, which belongs to the technical field of displaying, discloses a thin-film transistor and a method for manufacturing the same, an array substrate, and a display device. The thin-film transistor comprises a gate pattern, a gate insulating layer, an active layer pattern, a source pattern, and a drain pattern that are laminated successively. At least one of the surface, facing the gate insulating layer, of the source pattern, the surface, facing the gate insulating layer, of the drain pattern, and the surface, facing the gate insulating layer, of the gate pattern is a target surface that is capable of carrying out diffuse reflection on light entering the target surface to prevent entrance of the part of light into the active layer pattern. Therefore, a problem that normal working of a thin-film transistor is affected because of the offset of the volt-ampere-characteristic curve of the active layer pattern can be solved; and thus the influence on normal working of the thin-film transistor by the target light can be weakened. The thin-film transistor is applied to the display device.

The dummy cell of the SRAM corresponds to a normal memory cell of which first and second P-channel MOS transistors for loading are replaced by the first and the second N-channel MOS transistors, of which gate and source are provided with power supply potential and ground potential, respectively. When a word line rises to 'H' level, third and fourth N-channel MOS transistors for accessing are rendered conductive, to pass current from dummy bit line to a line of ground potential via the third N-channel MOS transistor, the first N-channel MOS transistor, and a fifth N-channel MOS transistor for driving. Accordingly, speed of potential decrease of the dummy bit line may be faster than that of bit line. Hence, operational timing can easily be optimized, and operational margin can be increased.

The invention provides a cathode active material and a preparation method thereof and application thereof in a lithium ion secondary battery. By introducing the high-voltage lithium cobalt oxide cathode active material into the lithium ion secondary battery, the cycle performance of the battery can be effectively improved, and meanwhile, along with the cycle of the lithium ion secondary battery, the DSC exothermic peak appearance temperature of the high-voltage lithium cobalt oxide cathode active material shifts to a lower temperature, but the shift degree is lower.

The invention discloses a target extraction and tracking camera and method of an inter-satellite laser communication PAT system. The three functions of detector driving and data processing, target detection and extraction and galvanometer control tracking are integrally designed in the two aspects of software and hardware, the miss distance delay can be reduced, the closed-loop control bandwidth of the system is improved, and the tracking precision of the PAT system is further improved. The basic working principle of the camera is as follows that: a short-wave infrared detector receives fine beacon light, detection and output of the fine beacon light are completed under the excitation of analog voltage and a digital time sequence of an FPGA chip, and an output signal is processed by an amplifying circuit and an analog-to-digital conversion circuit to form a digital image signal to enter the FPGA chip. Digital image data are subjected to a series of processing such as preprocessing, high-precision light spot extraction and galvanometer control in the FPGA chip, digital quantity is output to the digital-to-analog converter to generate control voltage, and finally a fine tracking galvanometer is controlled to complete high-precision and low-delay fine beacon light tracking.

The invention discloses a manufacturing method of a heat preservation and decoration integrated board, and belongs to the technical field of heat preservation and decoration, and the manufacturing method of the heat preservation and decoration integrated board comprises the following steps: S1, panel punching: punching a T-shaped through hole in a panel, S2, pre-burying a nut column: putting the nut column into the T-shaped through hole, S3, filling glue for hole patching, S4, panel sanding, and S5, veneer manufacturing. And S6, pressing and effective connection are conducted, specifically, the inner side faces of the face plate and the back plate are glued, the heat preservation layer and the reinforcing pieces are arranged between the face plate and the back plate, pressing is conducted, and the reinforcing pieces, the face plate and the back plate are fixed through threaded fasteners before pressing and/or after pressing, so that effective connection is formed. According to the manufacturing method of the heat preservation and decoration integrated plate, connection between the face plate and the back plate is reinforced through the reinforcing pieces, good reliability and safety are achieved, the face plate is provided with the T-shaped penetrating holes, the nut columns are embedded, good connection stability is achieved, and production and machining are facilitated.

The invention relates to a PDC (Polycrystalline Diamond Composite) drill bit with directional easy controllability enhancing performance. The PDC drill bit comprises a drill bit body, a crown part and cutting teeth, wherein a plurality of cutting teeth are arranged on the contour line of the crown part; the curved surface contour of the crown part of the drill bit is formed by sequentially and smoothly connecting a core part, a nose part, an outer side, a shoulder part and a gage section; the core part of the drill bit is a concave spherical surface; the cutting tooth near the center part of the drill bit is the cut-edge tooth; one intersection point of the cut edge of the cut-edge tooth with the excircle is positioned in the axial line of the drill bit body 1; the contour corresponding to the shoulder of the drill bit is of a spherical surface structure; and the contour corresponding to the gage section is of a conical structure. The PDC drill bit has the advantages that in the directional drilling and deflecting process, the fit of the core part of the drill bit with the shaft bottom is good; the steering resistance of the core part and the friction resistance of the gage are small; and the directional track deviation degree can be reduced through enhancing the directional operation and control performance of the drill bit and improving the shaft wall quality, so that the construction quality of directional drilling is improved.

The invention provides a device with storage and gating functions which comprises a bottom electrode, a conversion layer and a top electrode sequentially from downside to upside; the bottom electrodeis TiN or conductive glass; the conversion layer is made of niobium oxide; and the top electrode is tungsten. The device with the storage and gating functions is composed of the niobium oxide which serves as the conversion layer, the TiN or conductive glass which serves as the bottom electrode, and the metal tungsten which serves as the top electrode. The experimental results show that the deviceprovided by the invention has a gating function in the presence of big current limitation and has a resistance change performance (storage performance) in the presence of small current limitation; thedevice also has excellent stability as the deviation degree of the obtained curve is very small after the device is subjected to circular test for 100 turns in the gating and resistance change performance test; and the device also has a relatively big storage window as the resistance value of a high-resistance resistor is 10 greater than that of a low-resistance resistor in the resistance changeperformance test.

The invention provides a temperature measuring device and chemical vapor deposition equipment, and relates to the technical field of temperature measurement. The temperature measuring device comprises a horizontally arranged multi-stage structure and a temperature measuring element. The multi-stage structure is provided with multi-stage sleeves detachably connected in the axial direction of the multi-stage structure, the multi-stage structure is provided with a first end and a second end which are opposite in the axial direction of the multi-stage structure, the first end is a closed end, and in any two adjacent stages of sleeves, the inner diameter of the sleeve close to the first end is smaller than that of the sleeve close to the second end. The length of the sleeve close to the first end is smaller than that of the sleeve close to the second end; the axial length of the multi-stage structure is larger than or equal to 800 mm, the wall thickness of the portion, located at the first end, of the sleeve is smaller than 3 mm, and the temperature measuring element is detachably installed in the multi-stage structure and used for measuring the temperature of the end of the first end. According to the multi-stage structure, the self-weight resistance of the temperature measuring device can be improved, so that when the temperature measuring device is applied to the chemical vapor deposition equipment for temperature measurement, the deviation degree of the first end in the gravity direction can be slowed down, and the temperature measuring accuracy is improved.

The invention discloses a bridge widening and splicing method which comprises the following steps: 1, pre-embedding reinforcing steel bars and pouring required splicing pieces in advance in a factory, cooling and forming the splicing pieces, and storing the splicing pieces indoors; 2, transporting the poured splicing pieces by a plurality of transport vehicles, and transporting the needed splicing pieces to a construction site for standby application; 3, unloading the splicing pieces transported to the construction site one by one, quality inspection is conducted one by one after unloading is completed, whether the splicing pieces meet the construction standard or not is checked, meanwhile, whether the splicing pieces are damaged or not in the transportation process is checked, and registration is performing if the splicing pieces are damaged; and 4, starting to prepare equipment for new and old bridge construction. According to the method, the balance degree of widening of the new and old bridges is considered by means of laser, so that the problems that when the new and old bridges are widened, people need to observe the balance degree by means of eyes, deviation is caused, and the service life is shortened are effectively solved.

The invention discloses a light emitting device and a display panel. The light emitting device comprises a first electrode, a second electrode, a light-emitting layer arranged between the first electrode and the second electrode, including a first host material and a guest material, and having a side facing the first electrode and a side facing the second electrode, and an auxiliary light-emittinglayer arranged on at least one side of the light-emitting layer; and the auxiliary light-emitting layer material and the first host material are light-emitting host materials used for light-emittingdevices of the same color. The light emitting efficiency of the light emitting device can be improved.

The invention relates to auxiliary installation device for a deceleration strip of a parking lot gate road. The device comprises a moving frame, a positioning device and a mounting auxiliary device, wherein the positioning device is installed on the moving frame, the installation auxiliary device is arranged above the positioning device and installed on the side wall of the moving frame, the walking wheels are arranged at the lower end of the moving frame, and the installation auxiliary device comprises a positioning rod, an installation plate, an electric sliding block, a telescopic rod, a rotating motor, a connecting plate, a drill bit, a lifting air cylinder, an extrusion rod and a nail guide pipe. The deceleration strips to be installed are arranged and fixed in advance through the positioning device; so that compared with a manual hole opening mode, the hole opening auxiliary device has the advantages that the deviation degree of the hole opening position is reduced, the working position does not need to be repeatedly adjusted, and the working quality and the working efficiency are effectively improved.