35results about How to "Cost advantage" patented technology

The invention belongs to the technical field of synthesis and preparation of aluminum nitride, and discloses a controllable and extensible preparation method of a one-dimensional aluminum nitride nanowire / nanotube, which comprises the following steps: (1) uniformly mixing a solid aluminum source and a solid nitrogen source, transferring the mixture into a rotatable crucible, transferring the crucible into a tubular furnace, sealing the tubular furnace, and carrying out heat preservation for 2-3 hours; vacuumizing and then introducing protective gas; (2) under the condition that protective gas is continuously introduced, the tubular furnace is heated to a preset target temperature for a nitridation reaction, and the nitridation reaction is carried out under the condition that a crucible rotates at a constant rotating speed; and after the reaction is finished, cooling the tubular furnace and stopping the rotation of the crucible to obtain a one-dimensional aluminum nitride nanowire or nanotube product. According to the method, the solid aluminum source and the solid nitrogen source are used as raw materials, and the crucible rotation is introduced during the nitridation reaction to carry out dynamic enabling improvement, so that the single-crystal aluminum nitride nanowire or nanotube with high purity and uniform morphology can be efficiently synthesized.

The invention discloses a laser spot relative position measurement-based CA type five-axis machine tool rotating shaft zero error and axis error measurement compensation method. The method comprises the following steps of S1, detection system preparation: clamping or fixing a laser pen to a main shaft; s2, the A-axis zero error is measured and compensated, wherein the A-axis zero error is defined as the angle deviation between the actual posture and the theoretical ideal posture of the execution tail end of the machine tool when the rotating shaft is set to be at the 0-degree reference position; s3, measuring and compensating a C-axis zero error, wherein the C-axis zero error is defined as the angle deviation between the actual posture and the theoretical ideal posture of the execution tail end of the machine tool when the rotating shaft is set to be at the 0-degree reference position; s4, performing measurement compensation on the deviation of the A axis-main axis rotation center line in the Y direction; s5, measuring and compensating the deviation of the C-axis-main axis rotation center line in the Y direction; and S6, performing measurement compensation on the deviation of the C-axis-main axis rotation center line in the X direction.

This invention discloses an ultra-high strength and plasticity three-dimensional multi-level hybrid heterogeneous titanium-based composite material and its preparation method. The method includes: 1. performing a flow friction coating treatment on titanium alloy powder and modified amorphous cracked carbon with high active sites; 2. performing a flow friction coating treatment on modified high active and highly dispersed boron source; 3. low-temperature short-time high-pulse current-assisted vacuum hot pressing sintering; 4. multiple non-constant rate hot deformation treatments. This invention uses modified amorphous cracked carbon with high active sites and modified high active and highly dispersed boron source as reinforcing phase precursors to sequentially coat a titanium alloy powder matrix. Combined with sintering and hot deformation treatments, a multi-level, multi-scale, and multi-heterogeneous phase structure is constructed in four dimensions to obtain a three-dimensional multi-level hybrid heterogeneous titanium-based composite material, which exhibits ultra-high strength and plasticity, with a tensile strength of 1430 MPa to 1605 MPa and an elongation of 7.5% to 9%.

The application relates to the technical field of offshore wind power DC transmission, and discloses an offshore wind power bidirectional asymmetric feeding type DC transmission system and a control method thereof, which comprises a first conversion module, a second conversion module, a third conversion module, a switch module and an onshore conversion station, wherein the internal current flow path of the switch module is controlled, the third conversion module is used to establish an offshore collection voltage during black start, and after the black start is completed, the first conversion module and the second conversion module are connected to the system, so that the problem that an offshore wind farm cannot be black started is solved.

The application provides a two-stage MPC control method and system for power smoothing output, and relates to the field of new energy control. A discrete state space prediction model is constructed; all state variables are obtained in the current sampling period and used as the input of the first-stage MPC control; the mechanical and electrical state prediction sequence and the optimal control input are obtained by combining the constraint condition and the dynamic optimization objective function of the second-stage MPC control feedback in the last sampling period; in the second-stage MPC control, the optimal power trajectory meeting the smoothing requirement is obtained by combining the smoothing optimization objective function, and is mapped to the control constraint interval of the next sampling period and fed back to the first-stage MPC control; the optimal control input is applied to the execution equipment, and after the constraint condition is fed back to the first-stage MPC control, the next sampling period is entered. The application can inhibit the rapid fluctuation of the generated power without energy storage devices, improve the grid connection quality, and enable the renewable energy power generation system to still stably output under the severe changes of the external environment.

The invention discloses a multifunctional PLC expansion device based on an FPGA and a configuration method thereof.The device comprises the FPGA, the FPGA comprises a communication module, a function configuration module, a pulse output module, a serial port module, a pulse counting module and an IO control module, the communication module is used for receiving a configuration instruction, and the function configuration module is used for receiving the configuration instruction; the function configuration module is respectively connected with the communication module, the pulse output module, the serial port module and the pulse counting module, and is used for selectively activating any one of the pulse output module, the serial port module or the pulse counting module according to the configuration instruction; and the IO control module is respectively connected with the pulse output module, the serial port module and the pulse counting module for function output.

This application relates to a stacked interlocking semiconductor packaging structure, comprising: a substrate, a base plate, two chips, a packaging layer, and a protective shell; the substrate is disposed on the top surface of the base plate, and two chips are disposed on the substrate, with the packaging layer encapsulating the chips and the substrate; the protective shell is disposed on the top surface of the base plate and surrounds the sidewalls of the packaging layer; the protective shell includes: two or more stacked rings, each ring having a limiting groove on its inner sidewall, and the packaging layer having multiple limiting protrusions on its sidewalls, the limiting protrusions matching the limiting grooves for embedding within the limiting grooves. The protective shell surrounding the packaging layer effectively isolates and protects the packaging layer, preventing damage caused by direct exposure of the packaging layer's sidewalls to the outside. This application utilizes a stacked, interlocking ring structure to reliably complete the packaging process of microelectronic components or semiconductor devices; the overall structure is simple and easy to manufacture; it has significant advantages in terms of process speed and cost.

The invention relates to a frame interface for an electric bicycle, comprising a frame element with a first fastening region and a second fastening region, and comprising a fastening element, wherein the first fastening region is provided for the bearing-like fastening of a drive unit on the frame element, wherein the fastening element is fastenable on the second fastening region, wherein the second fastening region has a first clamping surface and the fastening element has a second clamping surface, which are provided for jointly encircling at least one partial region of the drive unit in a ring shape, in order to fasten the drive unit on the second fastening region by means of a clamping force.

The invention discloses an unbalanced bridge method direct current insulation detector with a compensation correction function. The detector takes a microcontroller as a core and is connected with an unbalanced bridge detection module, a key setting module, a communication module, a detection indication module and an alarm output module; the unbalanced bridge detection module comprises an unbalanced bridge circuit and a signal conditioning circuit, the unbalanced bridge circuit is used for establishing an unbalanced bridge loop between the positive electrode and the negative electrode of the detected direct current system and the ground, and when the direct current system has insulation imbalance, an unbalanced voltage signal is output; after being amplified and filtered by the signal conditioning circuit, the signals are input into the microcontroller, the microcontroller calculates to obtain positive electrode resistance to ground and negative electrode resistance to ground and compares the positive electrode resistance to ground and the negative electrode resistance to ground with a threshold value, and when a detection result is lower than the threshold value, an alarm is triggered or a fault loop is cut off. According to the invention, a hardware and software combined compensation correction technology is adopted, and the method has the advantages of fast detection speed, high precision, strong anti-interference capability and flexible communication.

The invention relates to a micromechanical component for a stress sensor, having a first substrate (10) with a first substrate surface (10a), a second substrate (12) with a second substrate surface (12a) and an evaluation electronics (20) configured at and / or in the second substrate (12), wherein the first substrate (10) is fixed at the second substrate (12) by means of at least one electrical connection (22) formed by means of a metal bonding method, which is configured in an intermediate volume (14) between the first substrate surface (10a) and the second substrate surface (12a), wherein at least one electrode (16, 16a, 16b, 62) and at least one counter electrode (18a, 18b, 18c) are arranged in the intermediate volume (14), wherein the at least one electrode (16, 16a, 16b, 62) and / or the at least one counter electrode (18a, 18b, 18c) are electrically connected at the evaluation electronics (20) by means of the at least one electrical connection (22) formed by means of a metal bonding method.

The invention provides an in-situ polymerized lithium iron phosphate-bright aluminum foil composite positive electrode and a preparation method thereof, and relates to the field of lithium batteries. According to the positive electrode slurry, the functional additive A and the functional additive B are adopted for compatibility, and the additive B is a compound of which the molecular structure simultaneously contains polymerizable carbon double bonds and phosphate groups and is used for linking an inorganic surface and an organic polymer; the functional additive A and the functional additive B are compatible to construct a three-dimensional stable chemical bonding network, and a dynamic gradient conductive interface layer with high conductivity and strong binding power is constructed on the surface of the optical aluminum foil in situ, so that the risk that an active material falls off from a current collector in the later period of circulation is greatly reduced, and the interface resistance is remarkably reduced; the mechanical stability of the pole piece is remarkably improved (the interface bonding strength can still be kept at 90% after 1000 times of circulation), and the cycle life is long.

An apparatus (1) includes a self-centering device (2) for centering and guiding a bar (B), tube, or the like to be fed into the spindle of a machine tool. The apparatus includes a hollow housing (3) with a through-hole (5) having a longitudinal axis (X) for receiving the bar (B) to be fed into the spindle along a feeding direction (A). An inner sliding surface (4) is defined within the housing (3) and inclined relative to the longitudinal axis (X). Centering and guiding elements (6) are provided. It is housed in a hollow body (3) and shaped to contact the rod (B) and apply distributed centering and guiding action thereon; the centering and guiding element (6) is able to slide along the inner surface (4) at a distance from the longitudinal axis (X) to accommodate different rod (B) diameters; in the body (3), an elastic device (7) is housed to push the centering and guiding element (6) to a position with minimum reciprocating distance, thereby making and maintaining the centering and guiding element (6) in contact with the surface of the rod (B) during operation. A propulsion device (30) for a bar (B) is also disclosed, comprising: a support and guide member (31) configured to continuously receive the bar (B) from a first side (L1) and configured to guide the bar (B) along a propulsion direction (A); a movable gripping member (32) moving from a disengaged position (P1) and further from the member (31) to be separated from the bar (B) to a locked position (P2) closer to the support member (31) to longitudinally press the bar (B) against the support member (31) from a second opposing side (L2); and a propulsion engine device (M) configured to rotate the support and guide member (31) and / or the movable gripping member (32) at the locked position (P2) to drag the bar (B) along the propulsion direction (A).

In order to achieve improvement in running stability and operability, improvement in freedom of design layout, ease of assembly and adjustment, and compliance with the riding feeling of the user with a simple configuration, on a running unit (140), a neutral restoration mechanism (160L, 160R) is provided which supports a pair of left and right wheels (155L, 155R) by upper and lower moving swing arms (151L, 151R) in a staggered linkage and has an extension member (165L, 165R) that extends and contracts in accordance with the swing of the swing arms (151L, 151R), the neutral restoration mechanism (160L, 160R) being configured so that the torque acting on the swing arms (151L, 151R) by the restoration force of the extension member (165L, 165R) is substantially constant and independent of the amount of swing of the swing arms (151L, 151R). The running vehicle is provided with the above-described running unit (140).

A magnetism measurement device has a first magnetic sensor (An) that detects magnetism acting along any first direction, a second magnetic sensor (Bn) that detects magnetism acting along a second direction crossing the first direction in which the first magnetic sensor detects magnetism, and a magnetic field generating part (Cn) that causes a magnetic field to be generated in response to energization, and the magnetic field generating part (Cn) is incorporated in a state in which positions opposed to the first magnetic sensor (An) and the second magnetic sensor (Bn) are fixed, so as to act with magnetism along the first direction and the second direction in response to energization.

The application provides a wide free spectral range multispectral imaging chip structure, which comprises a pixel photosensitive unit and a light splitting unit, the pixel photosensitive unit is divided into a plurality of pixel regions along one of pixel directions a in sequence, and the other pixel direction b is not distinguished; the light splitting unit comprises a plurality of light splitting structures, the plurality of light splitting structures are integrally deposited and grown on the plurality of pixel regions one by one respectively, the light splitting structures are used for realizing narrowband filtering, and the plurality of light splitting structures respectively cover different spectral ranges. The application scheme breaks through the limitation of the free spectral range due to the material refractive index difference, and widens the free spectral range of narrowband filtering of a monolithic image sensor.

The utility model discloses a child seat with an adjustable backrest length. The child seat comprises a seat assembly. The backrest piece can rotate relative to the seat assembly so as to adjust the inclination angle of the backrest; the backrest telescopic part is mounted on the backrest part in a sliding manner and is used for adjusting the effective length of the backrest; one end of the connecting belt is connected with the backrest telescopic piece, and the other end of the connecting belt is connected with the seat assembly; one end of the reset piece is connected with the backrest telescopic piece, and the other end of the reset piece is connected with the backrest piece or the seat assembly; the connecting point of the connecting belt and the seat assembly is different from the rotating point of the backrest piece and the seat assembly; when the backrest piece rotates, the backrest telescopic piece can slide relative to the backrest piece through cooperation of the connecting belt and the reset piece, and the effective length of the backrest is automatically adjusted. Through the synergistic effect of the connecting belt and the reset piece, the backrest telescopic piece can automatically slide along with rotation of the backrest piece, the effective length of the backrest is automatically adjusted, and comfort and convenience are improved.

The invention belongs to the technical field of medicine synthesis, and particularly relates to an intermediate compound of alasset hydrochloride, a preparation method of the intermediate compound and a preparation method of the alasset hydrochloride. The preparation method of the alasset, provided by the invention, is safe, environment-friendly and suitable for industrial production.

The invention relates to a method (20) for operating a drive assembly (10) of an electric bicycle (100), comprising the following steps: detecting (21) a pedal frequency of a crank drive (104); detecting (22) a rear wheel rotational speed of a rear wheel (110); determining (23) a transmission ratio between the crank drive (104) and the rear wheel (110); determining (24) an intervention ratio (31) on the basis of the pedal frequency and the rear wheel rotational speed and the transmission ratio; generating (25) a motor torque as a function of the determined intervention ratio (31).

This utility model relates to the technical field of electronic expansion valves, and in particular to a magnetic rotor assembly for an electronic expansion valve. Its overall structure has high integration, fewer parts, which is beneficial for weight reduction, better quality, and cost advantage. It includes a screw, a magnetic ring, and a stop rod. The stop rod is installed inside the magnetic ring, and the screw is installed inside the magnetic ring. The screw is used for the up-and-down transmission of the valve needle component. The magnetic ring provides magnetism to provide driving force, and the stop rod provides a stopping function.

This invention discloses a poly(4-methyl-1-pentene) aerogel, its preparation method, and its applications. By using camphene as a solvent for poly(4-methyl-1-pentene), a thermally induced phase separation process is initiated by controlling the cooling rate, followed by conventional drying to obtain a white aerogel with good self-supporting properties. The preparation method is simple and mild, requiring no complex processes or expensive equipment, and can be produced on a large scale. The aerogel possesses a rich microporous structure and extremely high solar reflectivity, making it suitable for radiative cooling for passive cooling. Furthermore, the aerogel prepared by this method exhibits excellent superhydrophobicity and thermal insulation properties, enhancing its potential for outdoor applications.

The utility model discloses a handle for electronic thoracoscope and laparoscope, including casing, interface, signal board, mainboard and rotating component, the front end outside of casing is provided with locking device, and locking device inside hollow, the interface, signal board and mainboard all are located in the casing, the interface is located locking device terminal, signal board and mainboard are connected through FPC between, and signal board and mainboard are rigidly connected between, rotating component includes angle knob, gear and connecting rod, angle knob is located the outside of casing, and angle knob is set up in the outer peripheral surface of gear, and both synchronous rotation, the front end of gear is fixedly connected with mainboard through connecting rod. The utility model discloses still a kind of electronic thoracoscope and laparoscope. The utility model has the beneficial effect that: the utility model restricts the rotation angle of human wrist, improves the convenience of surgical operation, so that doctors can more conveniently and efficiently obtain different visual angle surgical field of view, ensure the accuracy of surgical operation.

This invention provides a high-strength polyester fiber for outdoor use with radiative cooling function. The preparation method includes the following steps: titanium dioxide, silicon dioxide, silicon carbide, and zirconium phosphate are blended and ground in a certain proportion, dispersed in an acetone solution with a dispersant added, and then ultrasonically treated to form a nanoparticle dispersion; the nanoparticle dispersion is mixed with polyester chips; the mixed composite material is fed into a screw extruder for melt blending to form a spinning solution; the spinning solution is precisely metered by a metering pump and extruded through a spinneret to form fiber bundles, the spinneret being equipped with a slow-cooling heating device; the fiber bundles are post-treated to obtain high-strength polyester fibers. This invention selects a specific combination of titanium dioxide, silicon dioxide, silicon carbide, and zirconium phosphate, combined with specific slow-cooling technology and high-ratio stretch setting, to give the fiber excellent radiative cooling performance and mechanical strength, which can be widely used in outdoor clothing, awnings, car covers, and other fields.

This utility model belongs to the field of engineering construction technology, specifically a large-diameter pipeline high-altitude assembly operation platform, comprising: a main structure with an opening for mounting process pipelines from top to bottom, the opening being U-shaped, and lifting holes on the main structure; external platforms located at the bottom of both sides of the main structure; movable ramps located at the bottom of the main structure, with their ends resting on the two external platforms; and a protective cage located on both sides of the main structure, above the external platforms. This utility model's large-diameter pipeline high-altitude assembly operation platform is simple to manufacture, reusable multiple times, and performs well, ensuring pipeline construction quality and reducing labor and machinery costs.

The application discloses use of cystatin A in preparation of a medicine for promoting skin wound healing, wherein the cystatin A is a small molecule secretory protein, the English name of which is Cystatin A, and the molecular weight of which is 12 kDa. The application proposes that the cystatin A is used for preparation of the medicine for promoting skin wound healing, in particular, a small molecule medicine taking the cystatin A as an active ingredient. The cystatin A applied locally on a wound can effectively promote skin wound healing, has high safety, is stable, can treat large-area skin wounds, has low synthesis cost, provides a new way for clinical treatment of skin wound healing, and has important clinical application value.

The invention relates to a method for operating an NMR measurement system having a main field magnet for generating a static main magnetic field B0 in the z-direction, a measurement HF coil for exciting a core spin of a measurement substance, an NMR lock regulator for detecting field disturbances and for generating a correction field by means of a compensation coil, the lock regulator being carried out, the invention relates to a method for measuring the spin of a reference substance, comprising a locking adjustment during which the spin of the reference substance is excited, characterized in that the spin magnetization M of the reference substance is brought from an unbalanced state into a state in which the x component Mx of the spin magnetization has an equilibrium value Mxeq by applying an HF pulse (1, 1 '), the x component Mx of the spin magnetization being oriented in an x-direction perpendicular to the z-direction, whereby improved measurement accuracy is achieved.

This invention relates to a test tube capping device, mainly comprising an upper cover tray, a test tube tray, and a lifting platform. When the lifting platform rises, it lifts the test tube tray and the test tubes on it, causing the test tubes to engage with the upper cover mounted on the upper cover tray. After engagement, the lifting platform lowers the test tube tray and the test tubes, and the upper cover, already pressed against the test tubes, detaches from the upper cover tray and descends with the test tubes. Therefore, this invention can cap only the test tubes already mounted on the test tube tray, allowing for capping of a specific number of test tubes at specific locations without requiring capping the entire tray. Furthermore, the overall configuration of the device is more compact, the mechanism and operation are quite simple, stable and reliable, and cost-effective.

The application provides a battery management communication system, method, device and computer readable storage medium. The battery management communication system comprises a battery system general controller, at least one battery cluster master controller, at least one battery module controller, a direct-current power supply bus and a plurality of power carrier communication modules. The direct-current power supply bus is configured to provide working power supply for the battery system general controller, the battery cluster master controller and the battery module controller. The battery system general controller, each battery cluster master controller and each battery module controller are respectively connected to one power carrier communication module, and each power carrier communication module is electrically connected to the direct-current power supply bus. The power carrier communication module is configured to take the direct-current power supply bus as a communication medium to perform power carrier communication between the battery system general controller, the battery cluster master controller and the battery module controller. The application realizes simplified wiring and operation and maintenance efficiency improvement through multiplexing of the power supply bus carrier communication.

An aluminum / aluminum alloy core coaxial cable relates to the technical field of cables, which comprises an inner conductor, a conductor shielding layer, an insulation layer, an insulation shielding layer, an outer conductor layer, a wrapping layer and a sheath layer from inside to outside, wherein the inner conductor is made of aluminum / aluminum alloy material, and the outer conductor layer is a single-layer structure and is composed of a plurality of concentrically arranged copper single wires. Compared with the existing coaxial cable, the aluminum / aluminum alloy core coaxial cable has the following advantages: under the same carrying capacity, the cross-sectional area of the aluminum / aluminum alloy core conductor is about 1.3 times larger than that of the copper core conductor, and under the condition that the thickness of the insulation layer remains unchanged, the outer circumference of the insulation layer also increases accordingly, so that more copper single wires can be accommodated in the single-layer structure, thereby meeting the resistance requirement of the outer conductor layer; the finished product diameter of the aluminum / aluminum alloy core coaxial cable is larger than that of the copper core coaxial cable with the same carrying capacity, so that the aluminum / aluminum alloy core coaxial cable has a larger heat dissipation area and better heat dissipation performance; and the aluminum / aluminum alloy is cheaper than copper as the inner conductor, so that the aluminum / aluminum alloy core coaxial cable has more advantages in cost.

This invention relates to a multi-state transport device with a synchronous containment structure, comprising a main structure, deformable units respectively disposed on both sides of the main structure, movable support components respectively associated with the deformable units, and an additional synchronous structure for applying synchronous retraction drive to the deformable units on both sides during containment. When transitioning from an expanded state to a containment state, the synchronous structure applies synchronous retraction drive to the deformable units on both sides in the containment direction, forming motion coupling and establishing a motion linkage retraction relationship between the deformable units on both sides, forcing the deformable units on both sides to contain synchronously, and the movable support components on both sides synchronously retract from the ground support position to the containment position. The synchronous structure does not apply synchronous constraints to the deformable units on both sides during deployment; it only functions during containment. This invention achieves smooth and coordinated containment through a two-way mechanism of natural gravity synchronization during deployment and forced synchronization by the synchronous structure during containment, resulting in a simple and reliable structure.