7results about How to "Good controllability" patented technology

This application relates to the field of two-dimensional semiconductor material preparation technology, specifically to a method for preparing monolayer molybdenum disulfide by dual-sulfur source chemical vapor deposition, comprising the following steps: Step 1, providing a chemical vapor deposition reaction chamber having an upstream region, a growth region, and a downstream region; Step 2, arranging a molybdenum-containing precursor in the growth region, and arranging a substrate above or opposite to the molybdenum-containing precursor; Step 3, arranging a first sulfur-containing precursor in the upstream region and a second sulfur-containing precursor in the downstream region; Step 4, introducing a carrier gas into the reaction chamber and heating it to cause the first sulfur-containing precursor, the second sulfur-containing precursor, and the molybdenum-containing precursor to volatilize and undergo a chemical vapor deposition reaction on the substrate surface to form a monolayer molybdenum disulfide. This invention employs a dual-sulfur source strategy, achieving large-size, uniform, and low-defect preparation of monolayer MoS2, facilitating widespread application.

The present application belongs to the technical field of traditional Chinese medicine, and specifically discloses a traditional Chinese medicine composition for treating children's functional dyspepsia, a preparation method and application thereof. The traditional Chinese medicine composition is prepared from the following raw medicinal materials by weight: Fructus Aurantii Immaturus 5-20 parts, Magnolia officinalis 5-20 parts, Forsythia suspensa 5-30 parts, Dendrobium 5-30 parts, Atractylodes macrocephala 5-20 parts, and Glycyrrhiza 5-30 parts. The pharmacological experiment results show that the traditional Chinese medicine composition has the effects of improving gastrointestinal motility and regulating gastrointestinal hormone secretion, has a significant therapeutic effect on children's functional dyspepsia, has stable curative effect, and has a small dosage. Meanwhile, the present application has the advantages of simple process operation, low cost, good controllability and stability, and is suitable for industrialized mass production.

This invention discloses a frame-based screw-connected powertrain suspension bracket structure, including a frame crossbeam. A left end plate, a right end plate, and a lower end plate are connected to the frame crossbeam. Both the left and right end plates have mounting bolt connection holes. The left and right end plates each have connecting flanges on their sides. The lower end plate has a connecting portion. One end of the connecting flange and one end of the connecting portion are respectively connected to the top and bottom of the frame, and the other end of the connecting flange is connected to the other end of the connecting portion. Using this frame-based screw-connected powertrain suspension bracket structure improves layout flexibility, optimizes the dynamic stiffness and vibration isolation performance of the mounting point, and enhances connection reliability.

This invention discloses a fluorescence emission-independent excitation carbon quantum dots and its preparation method. The method includes: Step 1, mixing o-phenylenediamine and boric acid at a molar ratio of 4 mmol:(1.2~4 mmol), grinding the mixture, transferring it to a square ceramic boat, and placing it in an oven. Under air atmosphere, the temperature is increased from room temperature to 100~135℃ at a heating rate of 5℃ / min, and the solid-phase reaction is carried out for 4~6 h. The mixture is then naturally cooled to room temperature to obtain a brownish-red solid; Step 2, dissolving the brownish-red solid in deionized water and sonicating it to obtain a yellowish-brown liquid; Step 3, filtering the yellowish-brown liquid to obtain a pure carbon quantum dot aqueous solution; Step 4, freeze-drying the carbon quantum dot aqueous solution to obtain carbon quantum dot powder. This invention simplifies the process flow, reduces energy consumption and post-processing complexity, and provides controllable reaction process. The prepared carbon quantum dots exhibit fluorescence emission-independent characteristics and long-wavelength orange fluorescence.

The present application relates to lithium battery electrode material technical field, specifically to a kind of fluidized bed element doped silicon-carbon negative electrode material and its preparation method, lithium battery;Preparation method includes: the boron lithium compound is placed in heating container, inert carrier gas is imported, heating makes it be gaseous form, carrier gas is connected fluidized bed reactor gas path, gaseous boron lithium compound is imported into the fluidized bed that has been ahead of time into porous carbon, boron lithium element co-doping is carried out;Then again pass into silane mixed gas, gas phase cracking deposition silicon, form boron lithium element co-doped silicon-carbon material, or the addition timing of silane mixed gas is same with the addition timing of gaseous boron lithium compound;Finally pass into carbon source, carry out CVD carbon coating;The carbon-coated boron lithium element co-doped silicon-carbon material prepared by the present application can improve ion diffusion rate and electronic conductivity, significantly improve battery kinetics and initial efficiency.

The embodiment of the specification discloses an offline intelligent wearable device NFC service processing scheme. Including: controlling the NFC card reader on the offline intelligent wearable device to be in a closed state; receiving an NFC service trigger instruction; entering a designated service application, and automatically switching the NFC card reader from the closed state to the open state through the designated service application; reading target information from a target NFC device through the NFC card reader in the open state, and writing user information of the offline intelligent wearable device to the target NFC device, so that the target NFC device interacts with the service end of the designated service application according to the user information, and executes corresponding target service; according to the target information, a short-distance wireless communication connection is established with the target NFC device, and the execution result of the target service returned by the target NFC device is received, wherein the maximum communication distance corresponding to the short-distance wireless communication connection is greater than the NFC communication distance of the target NFC device.

This invention belongs to the field of wire bonding technology and discloses a bonding method and application of copper-based bonding wires. The bonding method includes the following steps: depositing a composite metal interlayer at the bonding location on the chip; contacting the bonding end of the copper-based bonding wire with the composite metal interlayer and performing ultrasonic bonding to complete the bonding of the copper-based bonding wire; wherein, in the ultrasonic bonding step, three sets of ultrasonic power and bonding pressure are applied sequentially, satisfying the following conditions: second ultrasonic power > third ultrasonic power > first ultrasonic power, and second bonding pressure ≥ third bonding pressure > first ultrasonic power. This invention effectively overcomes the technical bottlenecks of easy chip damage and easy formation of brittle intermetallic compounds at the bonding interface when copper-based bonding wires are applied to IGBT chips, through the synergistic effect of the composite metal interlayer and the multi-stage gradient ultrasonic bonding process. It achieves a high-strength, non-destructive connection between the copper-based bonding wire and the chip pad, significantly improving the long-term reliability and stability of the bonding interface.