305results about How to "Avoid mutual influence" patented technology

The invention relates to an NAND memory and a preparation method therefor. The NAND memory comprises a silicon substrate, a plurality of peripheral devices, a plurality of NAND strings formed above the peripheral devices, a monocrystal silicon layer formed above the multiple NAND strings, and one or more first interconnection layers formed between the multiple peripheral devices and the multiple NAND strings, wherein the monocrystal silicon layer and the multiple NAND strings are in contact connection. By manufacturing array devices and peripheral devices separately, mutual influence to the processing process of the two devices in manufacturing can be avoided, so that the problem of limitation to the post layer manufacturing by the temperature of the former layer in the prior art can be solved, thereby obtaining high peripheral device performance; and in addition, the array devices are overlaid on the peripheral devices, so that high device density is realized.

The invention discloses a semiconductor device and a preparation method thereof. The semiconductor device sequentially comprises a silicon substrate, one or more NAND strings formed at the upper partof the silicon substrate, one or more peripheral devices formed at the upper parts of the NAND strings, a monocrystal silicon layer formed at the upper parts of the one or more peripheral devices, andone or more first interconnection layers formed between the one or more peripheral devices and between the one or more NAND strings from bottom to top, wherein the peripheral devices are bonded withan array device through a bonding interface. The preparation process that two devices are affected by each other when prepared can be avoided through separating preparation of the array device and theperipheral devices, so that the problem of temperature limitation of preparation of the front layer to preparation of the back layer in the prior art is solved, thereby obtaining good performance ofthe peripheral devices. In addition, the peripheral devices are superposed on the array device, thereby achieving high device density.

The invention discloses an urban express road intersection public transit priority signal coordinating and timing method which includes the steps: performing dividing and numbering for control areas, and dividing urban express roads under the tidal traffic flow actions into two types of control areas according to a fact that whether intersection downstream roads have bus stops or not; building traffic characteristics data sets; determining initial signal timing schemes comprising initial signal phase structures, initial signal control periods and initial phase green time of intersections; respectively constructing intersection public transit priority signal timing models for the two types of control areas, and calibrating model parameters; determining intersection public transit priority signal timing prioritization schemes, and determining public transit priority green time of the intersections and phase green time of the intersections by the aid of a 'value testing method'; determining an intersection public transit priority signal coordinating and timing scheme. Waiting delay of major traffic flow of the express road at the intersections is greatly reduced, and traffic efficiency is improved.

The invention provides a true triaxial simulation test device for three-directional rigid loading impact ground pressure. The problem that the simulation is not vivid in an existing impact ground pressure test device is solved. The true triaxial simulation test device comprises a pressure box, wherein the pressure box is internally provided with a pressure cavity, and further comprises a rigid loading unit and an impact loading unit; the inner periphery of the pressure cavity is provided with a flexible confining pressure loading jacket; the flexible confining pressure loading jacket has elastic deformation amounts in X, Y and Z directions; the rigid loading unit comprises loading oil cylinders of the pressure box in the X, Y and Z directions; telescopic shafts of the loading oil cylinders penetrate through the outer wall of the pressure box and the inner ends of the telescopic shafts are fixedly connected with loading base plates; the inner surfaces of the loading base plates abut against the outer surface of the flexible confining pressure loading jacket; and the impact loading unit comprises a lifting device in the Z direction and an impact weight is hung under the lifting device. According to the true triaxial simulation test device, the influences of deformation with one another in the three directions are solved, and the influences of a supporting effect are also avoided, so that the impact ground pressure is simulated relatively vividly.

The invention relates to a NAND memory and a preparing method thereof. The NAND memory comprises a plurality of NAND strings and a monocrystalline silicon layer formed on the plurality of NAND strings. The monocrystalline silicon layer is in contact connection with the NAND strings. Each of the said NAND strings comprises a plurality of conductors / insulator lamination layers, a semi-conductor channel which extends at the vertical direction and traverses through the plurality of conductors / insulator lamination layers; a tunnel layer formed between the plurality of conductors / insulator lamination layers and the semi-conductor channel; and a memory cell layer formed between the tunnel layer and the plurality of conductors / insulator lamination layers. The invention is advantageous in that through separating the preparation of array devices and peripheral devices, it can be prevented that the producing of one device will affect that of the other device; the problem of the prior art that thetemperature is limited due to the fact that the producing of the latter layer is affected by the producing of the former layer can be resolved; good peripheral device performance can be obtained; asthe array device is superposed on the peripheral device, high device density can be realized.

The invention discloses a clutch temperature control method and system for a wet type DCT. The method comprises the steps that according to oil temperature of a transmission, rotating speed of an engine, a shifting fork position signal, a gear signal, surface temperature of a first clutch, surface temperature of a second clutch, friction power of the first clutch, the friction power of the secondclutch and pressure of a main oil path, actual lubricating flow flowing into a clutch assembly is calculated; according to the actual lubricating flow flowing into the clutch assembly, the rotating speed of the engine, the oil temperature of the transmission, the friction power of the first clutch and the friction power of the second clutch, the surface temperature of the first clutch and the surface temperature of the second clutch are calculated; and then according to the surface temperature of the first clutch, the surface temperature of the second clutch and the oil temperature of the transmission, whether the clutch assembly is overheated or not is judged, and overheating protection is started in a hierarchical mode. By adopting the control method and system, accurate surface temperature of the clutches can be obtained, and the surface temperature of the clutches combines with the oil temperature of the transmission to be taken as a judgment basis for carrying out clutch overheating protection.

The invention relates to a sewage recycling comprehensive treatment technique, including that sewage is pretreated by a physicochemical technique and a biochemical technique; the pretreated sewage is separated by an immersed ultrafiltration solid-liquid separation system; ozone is used for eliminating part of organic matter and bacteria in the ultrafiltration membrane permeate liquid generated in the previous step; after being treated in the previous step, organic pollutant in the water is further removed by adopting activated carbon for filtering; after the treatment in the previous step, the water carries out reverse osmosis treatment to obtain permeate water of a reverse osmosis membrane, that is, reuse water. All sewage treatment techniques adopted by the invention are mutually matched, have reasonable sequence and play own roles independently, thus preventing the sewage treatment techniques from affecting with each other, allowing the equipment of each sewage treatment technique to achieve optimal treatment effect and leading to more complete sewage treatment.

The invention relates to a high-performance moderate-temperature inorganic phase-change energy-storage material and a preparation method thereof. The material comprises the following components by weight percent: 95-99% of sodium phosphate dibasic dodecahydrate and 1-5% of sodium salt additive, wherein the sodium salt additive comprises sodium metasilicate nonahydrate, sodium salt of carboxy methyl-cellulose and sodium polyacrylate. According to the invention, as an improvement of a traditional inorganic phase-change energy-storage material, the material provided by the invention has larger phase change latent heat larger than 210 J / g and appropriate phase change temperature 30-40 DEG C, is an energy storage material with good performance within the temperature range, and has a wide application prospect.

The invention discloses an E1 emulation realization method, which relates to the field of network simulation and comprises the following steps of: performing protocol encapsulation on a direction, and performing serialization processing on received data to generate a real-time transport protocol value; assembling a time division multiplexing (TDM) payload into a frame, forming cache data packets by using the processed data, and finishing a corresponding description table; attaching packet headers to the TDM payload, generating control word information and real-time transport protocol information according to configuration, and performing encapsulation according to a protocol; performing clock domain adaptation on the processed data, finishing Ethernet media access control (MAC) processing, and transmitting Ethernet data by using a media independent interface (MII); performing protocol decapsulation on the direction, receiving and caching the Ethernet data, and finishing MAC layer processing; classifying and identifying the Ethernet data packets, extracting the payload and related control bytes, and counting state information; and performing clock recovery on a processed TDM payload code stream, and externally transmitting the processed TDM payload code stream. The method is relatively lower in cost; updating can be performed; and requirements on the performance of a central processing unit (CPU) are reduced, and clock recovery performance is improved.

The embodiment of the invention provides an organic light-emitting display panel, a manufacturing method thereof and an organic light-emitting display device, and relates to the technical field of display. The organic light-emitting display panel provided by the embodiment of the invention comprises an array substrate, a pixel definition layer, a plurality of interval structures and a plurality oforganic light-emitting devices, wherein the pixel definition layer and the interval structures are arranged on the array substrate, a plurality of pixel openings are formed in the pixel definition layer, the interval structures are used for partitioning the pixel openings into a plurality of sub-pixel openings, and the cross section of each interval structure is in the shape of a inverted trapezoid; each sub-pixel opening is internally provided with an organic light-emitting device, and the organic light-emitting devices arranged inside the same pixel opening are used for transmitting light rays with the same color; each organic light-emitting device comprises an anode and at least one organic light-emitting functional layer, and the organic light-emitting functional layers positioned ontwo sides of each internal structure are separated from each other. Through the technical scheme, the display effect of the organic light-emitting display panel can be improved.

The invention discloses a remote update method and system. The method comprises the following steps: receiving firmware update information broadcast by a gateway through at least one coordinator; sending an update request for requesting update data to the gateway; receiving the update data taking frames as units transmitted by the gateway in response to the update request; updating firmware based on the received update data; and simultaneously transmitting the update data taking the frames as the units to two non-updated coordinators by updated coordinators, and updating all the coordinators at an update speed being an exponential multiple of 2. According to the method and the system, remote update processes is executed in background, so that normal use of current network equipment is not influenced, and the network equipment can process other data normally in the remote update processes. The remote update processes of the network equipment are independent, so that mutual influences are avoided, and the update efficiency is increased.

The embodiment of the invention provides an organic light-emitting display panel, a fabrication method thereof and an organic light-emitting display device, and relates to the technical field of display. The organic light-emitting display panel provided by the embodiment comprises an array substrate, a planarization layer, a pixel defining layer and a plurality of organic light-emitting devices, wherein a plurality of pixel openings are formed in the pixel defining layer, at least two organic light-emitting devices for emitting the same color are arranged in each pixel opening, positive electrodes of the organic light-emitting devices are electrically connected with pixel driving circuits on the array substrate in one-to-one correspondence, a plurality of grooves are further formed in theplanarization layer, the grooves are arranged between two arbitrary organic light-emitting devices in each pixel opening, the grooves are filled with hydrophobic layers, trenches are formed in the hydrophobic layers, extension directions of the trenches are same as extension directions of the grooves, and organic light-emitting function layers arranged at two sides of each trench are discrete to each other. With the organic light-emitting display panel provided by the technical scheme, the display effect of the organic light-emitting display panel can be effectively improved.

The invention provides a multi-dimensional vibration control method of a fulcrum bar tail supporting type aircraft model, belongs to the field of vibration active control, and relates to the multi-dimensional vibration control method of the fulcrum bar tail supporting type aircraft model based on a piezoelectric ceramic actuator and applied to an aircraft model wind tunnel test. The multi-dimensional vibration control method comprises the steps that two components of main vibration acceleration of the aircraft model are measured by a pitch acceleration sensor and a yaw acceleration sensor which are arranged on the centroid of the aircraft model, a main vibration vector of the aircraft model is obtained, and the real-time vibration plane of a fulcrum bar is determined; and the inertial force is introduced to solve a dynamic bending moment on an active section of a multi-dimensional vibration damper, and then the stress distribution on the active section is obtained, and the vibration control force is solved in real time according to the stress of the piezoelectric ceramic actuator on the active section. A multi-dimensional vibration active control system is adopted, the stability and reliability of the active vibration control system of a wind tunnel model are improved, the service life of the piezoelectric ceramic actuator is prolonged, and thus the wind tunnel test data quality and wind tunnel test safety are ensured.

The invention provides a detection method of vital signs during sleeping. The detection method is based on a sleep detection device which comprises a piezoelectric thin film sensor, and the piezoelectric thin film sensor collects pressure signals when a person sleeps. The method includes following steps: performing power amplifying and filtering on the pressure signals; setting sampling frequency,and performing AD sampling on processed pressure signals; selecting a time period, and processing the pressure signals collected within the time period to serve as reference signals for judging whether a user has heart beat, respiration, snoring and body movement; dividing the pressure signals into four branches, namely heart beat signals, respiration signals, snoring signals and body motion signals; according to the heart beat signals, the respiration signals, the snoring signals and the body motion signals, respectively calculating heart beat data, respiration data, snoring data and body motion data; according to the heart beat data, the respiration data, the snoring data and the body motion data, acquiring the vital signals of the person.

The invention relates to an inertia sensing apparatus, comprising a substrate, a first and second inertia sensing elements. The first inertia sensing element is connected to a substrate and has a containment space. The second inertia sensing element is connected to the substrate and is disposed in the containment space of the first inertia sensing element, wherein the first inertia sensing element and the second sensing element are connected to the substrate, and the first inertia sensing element and the second sensing element are not connected to each other, the first inertia sensing element and the second sensing element individually and independently detect at least one inertia motion of the inertia sensing apparatus. Therefore, the invention is based on the second inertia sensing element disposed in the containment space of the first inertia sensing element and they individually and independently detect at least one inertia motion of the inertia sensing apparatus, so as to decrease an area of the inertia sensing apparatus, thus reducing the chip size and prevent the two inertia sensing elements from coupling to result in decreasing the sensing precision.

The invention discloses a combined bed, wall cabinet and desk assembly for a student hostel, which mainly comprises a wall cabinet (1), a combined bed, a bookcase (3) and a desk (5), wherein the wall cabinet (1) is divided into left, middle and right cabinets and is positioned above the combined bed; a bed board (12) is paved above a bed frame (11) of the combined bed; an anti-falling guardrail (13) is arranged outside a bed edge of the bed frame (11); the bed frame (11) is also provided with a bedside clapboard (2); a drawer (4) with a lock is arranged on the left below the bed board (12); a box cabinet (6) is arranged below the drawer (4); a bookshelf (9) is arranged in the middle below the bed board (12) from top to bottom; the bookshelf (9) is divided into a shoe cabinet (8) and a pedal (7) from top to bottom; the pedal (7) is drawable; a garderobe (10) is arranged on the right below the bed board (12); the garderobe (10) is provided with two doors; the bookcase (3) is divided into four layers from top to bottom by clapboards; and the desk (5) with the drawer with the lock is arranged below the bookcase (3) and above one side of the bedside clapboard (2). The bed board of the combined bed is at a short distance from the ground and is also provided with the drawable pedal, so that a user can conveniently go to bed and get out of the bed and the sleeping safety is guaranteed; the combined bed, wall cabinet and desk assembly has a reasonable space layout, a compact structure and a function of providing convenience for sleeping, studying, object storing and the like; and a study zone and a sleeping rest zone are effectively separated, so that the dynamic-static separation is realized.

The invention discloses an independent sound system of an automobile seat. The independent sound system comprises a headrest, sound boxes, a power amplifier and a sound source, wherein the power amplifier is correspondingly connected with the sound boxes and the sound source in a signal mode. The headrest comprises an intermediate pillow portion, and wing portions on the left and right sides of the pillow portion extending toward the front of the headrest, wherein a cavity for embedding each sound box is formed in each wing portion, and a central axis of each loudspeaker in each sound box anda central axis of the headrest form an angle of 60-120 degrees. According to the independent sound system of the automobile seat, the sound boxes are arranged at the left and right wing parts of the headrest close to a head of a driver / passenger, so that the left and right loudspeakers face and are close to the left and right ears of a person in a small range and a short distance to form a stereofield effect of 'open headphones' near field listening. At the same time, the independent sound boxes of other seats in the same automobile can be prevented from influencing each other, the pressure caused by wearing earphones is avoided, and the ' in-head effect' of earphones cannot be formed.

The invention relates to a combined valve. The combined valve comprises a multifunctional valve, a confluence plate and at least one operation reversing valve, wherein a left opening and a right opening at one side surface of one operation reversing valve are respectively connected to a left cavity and a right cavity of a piston cylinder; a left reflux opening, a middle inlet and a right reflux opening at the other side surface of the operation reversing valve are respectively connected to a left flow channel, a middle flow channel and a right flow channel of the confluence plate; the channels of the left reflux opening and the right reflux opening of the operation reversing valve are respectively provided with a one-way valve; the left reflux opening and the right reflux opening are corresponding connected to a left flow channel and a right flow channel of the confluence plate through respective throttle valves; and the left inlet and right inlet of the multifunctional valve are respectively and correspondingly communicated with a left outlet and a right outlet through respective throttle valves. The combined valve avoids mutual influence among cylinders and collision abrasion to a piston and a cylinder end cover when the piston moves rapidly, prolongs the service life of the piston cylinder efficiently, and guarantees operation safety and stability of the piston cylinder.

The invention discloses a transport cart with an omnibearing movement function. The transport cart with the omnibearing movement function comprises a cart body platform, dual differential driving units, a goods platform, a control cabinet, an acceleration sensor, a battery power set and a wireless communication module. An embedded controller and a servo motor driver are arranged in the control cabinet. The four dual differential driving units are movably connected with the cart body platform. Both the control cabinet and the battery power set are fixedly connected into the cart body platform. An ultrasonic sensor, the acceleration sensor and the wireless communication module are fixed to the cart body platform. Numerical values measured by the acceleration sensor are transmitted to the embedded controller through the wireless communication module, and the servo motor driver drives the dual differential driving units according to the control quantity worked out by the embedded controller so as to achieve omnibearing movement of the cart body platform. According to the transport cart with the omnibearing movement function, through the coordinated control of the four dual differential driving units, the control performance of the system is improved, and the moving speed of the cart body platform is made more stable.

The invention discloses a port-reuse bidirectional charger and an application method thereof. The port-reuse bidirectional charger comprises a plurality of change-over switches, a rectifier, a plurality of isolated bidirectional DC / DC convertors and a charging interface, wherein the rectifier is connected with a power grid through alternating current and used for converting alternating current into direct current; the input sides of the isolated bidirectional DC / DC convertors are connected in parallel and then connected with the rectifier, and the output sides of the isolated bidirectional DC / DC convertors are connected to the charging interface through the change-over switches; a charged / discharged storage battery is connected to the charging interface, and the number and the connection mode of the output isolated bidirectional DC / DC convertors are selected by setting the on-off of the change-over switches so as to meet the charging and discharging power requirements of the storage battery. The change-over switches are arranged on the output side of the charger to realize port reusing, different numbers of chargers can be used in parallel when the power requirements are different,a circuit does not need to be redesigned, and the use is facilitated.

The present invention discloses a high acid crude oil electric desalting wastewater treatment method, which comprises that high acid crude oil electric desalting wastewater is sequentially subjected to an oil and suspended solid removing treatment, a sequencing batch reactor activated sludge treatment (SBR), a flocculation treatment, a Fenton oxidation treatment and a membrane bioreactor (MBR) treatment, wherein SBR is mainly provided for removing BOD and ammonia nitrogen, the flocculation treatment and the Fenton oxidation treatment are mainly provided for treating naphthenic acid and other organic matters difficultly degraded by SBR, and MBR is provided for deep treatment of residual dissolved organic matters and suspended solids after the Fenton oxidation treatment. According to the present invention, COD in the treated effluent is less than or equal to 40 mg / L, ammonia nitrogen in the treated effluent is less than or equal to 2 mg / L, petroleum in the treated effluent is less than or equal to 2 mg / L, and turbidity is less than 1 NTU, such that the stringent local discharging standard can be met, and the effluent can be used as influent for reverse osmosis constant depth reuse treatments. The method is suitable for standard discharging treatments of electric desalting wastewater from high acid crude oil processing or polymer flooding oil field wastewater and various naphthenic acid-containing wastewater.

The invention provides a bipolar MMC convertor station control system for an offshore wind power grid and a control method of the bipolar MMC convertor station control system. The system comprises anonshore bipolar MMC convertor station connected to an onshore alternating current system and an offshore bipolar MMC convertor station connected to an offshore wind plant, wherein the onshore bipolarMMC convertor station is connected to the offshore bipolar MMC convertor station; the onshore bipolar MMC converter station comprises positive and negative MMC converters which are respectively connected to the onshore alternating current system and are controlled by constant direct current voltage and constant reactive power; and the offshore bipolar MMC converter station comprises positive and negative MMC converters which are respectively connected to the offshore wind plant, and adopts a master-slave control strategy with power balancing capacity. The system and the method have the advantages that a stable synchronous alternating current power supply can be provided for the offshore wind plant, and the mutual influence between the positive and negative bipolar MMC converters is avoided.

A cross-flow fan is composed of vane wheel unit consisting of multiple fans, motor, back guide surface, stabilizer, exhaust guide plate and internal guide plate. Its features are that there are lobeson said back guide surface, stabilizer, exhaust guide plate and internal guide plate for disturbing the eddy and turbulent flow to reduce noise.

Belonging to the technical field of functional materials, the invention relates to a Janus magnetic molecularly imprinted nanosheet, a preparation method and application thereof. The method includes:preparing Janus hollow microspheres by sol-gel method, and conducting ultrasonic breaking to obtain a Janus nanosheet containing amino on one side and containing chlorine element on the other side; then taking surface chlorine element as the initiator of atom transfer radical polymerization, adopting dA as the template molecule, using 5-(2-methoxy vinyl)-2'-deoxyuridine as the functional monomer,and grafting a dA molecularly imprinted polymer to the hydrophobic surface of the Janus nanosheet; and then combining oleic acid coated Fe3O4 particles to the hydrophobic surface of Janus through thebonding effect between amino and carboxyl to prepare a Janus magnetic molecularly imprinted nanosheet adsorbent, and applying the obtained material to adsorption and separation of dA. The imprinted adsorption material constructed by the invention has the advantages of good selectivity, large adsorptive capacity to target dA and rapid separation.

The invention relates to a fluid refining device, in particular relating to a device for refining mixed liquid. The device comprises a tubular housing and a spiral piece arranged in the tubular housing, wherein, the spiral piece is composed of a plurality of gaskets in an overlying manner; the intermediate shape of the gasket is a round disc; the periphery of the disc is provided with bulged blades to form a cross; each gasket in the rear and each gasket in the front stagger an angle to form a rotating spiral piece the screw pitch of which gradually diminishes from an inflow end to an outflowend; the entry end of a center shaft of the spiral piece is provided with a cone-shape screw cap; the two ends of the spiral piece are provided with support rings which are fixed with the center shaftthrough a radius rod. The scheme can be used in multiple liquid mixing modes, cancels a bearing seat, reduces the volume of the device, has convenient installation, utilizes the cone-shape screw capto reduce the resistance entering the liquid, and utilizes a gas filled tube to lead the mixing of gas and liquid to be more convenient. The scheme has simple structure, can adjust the screw pitch ofthe spiral piece according to actual condition, and reduces cost.

The invention discloses a power system of a hybrid vehicle. The power system comprises an input shaft arranged in a transmission housing, wherein one end of the input shaft is fixedly connected to anengine through a clutch and the other end of the input shaft is connected to an auxiliary motor which can control the input shaft to rotate; the input shaft is in transmission connection with a main reduction gear of a differential through a D gear assembly and an output assembly; and a D third-speed driven gear in the D gear assembly is a starting gear or a reverse gear which can be driven by theauxiliary motor or the engine. The power system of the hybrid vehicle mainly has the beneficial effects of simple structure and ingenious design. Since the D third-speed driven gear acts as the starting gear and the reverse gear under the forward and reverse rotation control of the engine or / and the auxiliary motor, a D first-speed gear, a D second-speed gear and a reverse gear set structure areomitted. The auxiliary motor drives the D third-speed driven gear to realize the reverse of the vehicle, and the auxiliary motor drives the D third-speed driven gear to realize the starting of the vehicle so as to simplify the overall structure of a transmission and improve the performance and endurance of the whole vehicle.

The invention relates to an automatic tea fermentation system. A passage for enabling a fertilization box to pass through is formed in a fermentation tunnel; a pushing device is arranged at one end of the fermentation tunnel; a discharge device is arranged at the other end of the fermentation tunnel; and a water mist spray pipe and a heating device are arranged in the fermentation tunnel. A fermentation method employing the above-mentioned automatic tea fermentation systems comprises the steps of: loading fresh leaves into fermentation tanks; pushing the fermentation tanks into a fermentation tunnel in turn by a pusher; controlling oxygen content, temperature and humidity in the fermentation process; after fermentation, pushing the fermentation tanks to unloading equipment by the pusher, so as to realize automatic tea fermentation. The invention employs a structure containing the fermentation tunnel located in the fermentation chamber cooperated with the pusher, and reduces the volume of the fermentation space, thereby reducing energy consumption radically and reducing the chance of contamination by bacteria as well.

The present invention discloses a deep ultraviolet LED chip and a preparation method thereof. An N electrode of the deep ultraviolet LED chip comprises an N-type AlGaN layer, a multiple quantum well layer, a P-type AlGaN layer, an AlN / GaN superlattice ohmic contact layer and a P-type GaN layer. The AlN / GaN superlattice is composed of a doped or undoped AlN layer and GaN layer with a thickness of an atomic layer level; the P-type GaN layer is etched by the photolithography methods such as laser direct writing to form a nano-scale periodic pattern; and an evaporated transparent conductive layer and a P electrode pad composed of multiple layers of metal are prepared on the P-type GaN layer. The N electrode is a tunnel junction composed of a lightly doped P<->-type AlGaN layer, a heavily doped P<++>-type AlGaN layer, a heavily doped N<++>-type AlGaN layer and a lightly doped N<->-type AlGaN layer; and an N-electrode pad, an N electrode and a P electrode are separately prepared on the tunnel junction and then bonded to a conductive substrate. The invention improves the light extraction efficiency of the deep ultraviolet LED chip and enhances the current expansion performance and thermal diffusion performance of the deep ultraviolet LED chip.

The invention provides a multistage fracturing and exploitation control method. Switch sliding sleeves are arranged on n production layers in the pit respectively, every two adjacent switch sliding sleeves are connected through a packer, and the switch sliding sleeve at topmost end is connected to a well completion pipe sleeve through one packer. When operation needs to be conducted on a certain production layer, the switch sliding sleeve on the production layer is opened, and the sliding sleeve is closed after the operation is completed. Through the multistage fracturing and exploitation control method, production increase operation or exploitation control of the corresponding production layers can be achieved, interaction between all the layer segments can be effectively avoided, productivity of all the layer segments is maximized, the service life of a borehole is prolonged, and well drilling cost is reduced.

The invention provides a carousel picture display method and a carousel picture display device. The carousel picture display method comprises the following steps: monitoring a sliding operation of a user on a target picture displayed in a target display page on a screen of a terminal through an on Scroll End Drag function of Scroll View; in response to the monitored sliding operation, obtaining anoffset coordinate of the target picture; and determining to display the target picture or the next picture of the target picture in the target display page according to the offset coordinate. In thisway, the sliding operation of the user on the target picture displayed in the target display page on the screen of the terminal can be monitored through the on Scroll End Drag function of the ScrollView; and then, in response to the monitored sliding operation, an offset coordinate of the target picture is obtained; and it is determined to display the target picture or the next picture of the target picture in the target display page according to the offset coordinates. The situation of mutual influence of page switching and carousel picture switching is avoided.