Abstract: An electronic device includes a substrate, an interposer attached to a top of the substrate and comprising a plurality of through-silicon vias (TSVs), a plurality of core chiplets attached to a top of the interposer, and a plurality of memory chiplets attached to the top of the interposer, wherein each of the plurality of core chiplets comprises a number-theoretic transform (NTT) module.

Abstract: An epitaxial structure of a nonpolar AlGaN-based deep-ultraviolet (DUV) photoelectric detector and a preparation method thereof are provided. The epitaxial structure of the nonpolar AlGaN-based DUV photoelectric detector includes a nonpolar AlN buffer layer, a nonpolar Al0.15Ga0.85N buffer layer, and a nonpolar Al0.7Ga0.3N epitaxial layer that are sequentially grown on a LaAlO3 substrate. The LaAlO3 substrate takes a (100) plane as an epitaxial plane, and AlN[11-20] as an epitaxial growth direction. With the LaAlO3 substrate, the epitaxial structure reduces dislocations and stresses between the substrate and the epitaxial buffer layer. By designing two AlGaN epitaxial buffer layers with different components, the epitaxial structure reduces a dislocation density and a surface roughness of the nonpolar AlGaN epitaxial layer, further accelerates photoresponse and detectivity of the detector, and enhances overall performance of the nonpolar AlGaN-based DUV photoelectric detector.

Abstract: A vibration suppression method and system of a rolling mill roller assembly based on a vibration damping device are provided. The vibration suppression method includes: obtaining a first amplitude-frequency relationship during a vibration process of a rolling mill roller assembly vibration suppression system; based on the first amplitude-frequency relationship, determining two time domain relationships and two second amplitude-frequency relationships by a simulation analysis; based on the two time domain relationships and two second amplitude-frequency relationships, adjusting parameters of the vibration damping device until a vibration displacement of the rolling mill roller assembly vibration suppression system is less than or equal to a vibration displacement threshold. And provides a new solution for the stability control of the rolling mill, and ensures the reliability and stability of the vibration suppression of the rolling mill.

Abstract: The present invention provides a personalized registration method for a template library of anatomical morphology and mechanical properties of materials of bone CT images. In the method, a large number of bone CT images of healthy persons are used to build a statistical model capable of containing anatomical morphology and mechanical properties of materials of bones, the parameterized description of bones of a patient is realized by a personalized registration method for the statistical model and bone CT images, a prosthesis template library is built by using images of the patient and registration parameters, and the template library is matched with the CT images of the patient by the personalized registration method to retrieve template images and prosthesis models similar to the bone conditions of the patient from the template library as the initial reference template for design of personalized prosthesis implants.

Abstract: A drilling device for geotechnical engineering investigation is provided, including an outer supporting ring seat, where a center of the outer supporting ring seat is rotatably connected with a middle supporting ring seat through a first supporting shaft rod; a center of the middle supporting ring seat is rotatably connected with an inner supporting ring seat through a second supporting shaft rod; the first supporting shaft rod and the second supporting shaft rod are vertically crossed; a second rotating motor is fixedly installed at one end of the first supporting shaft rod on an outer surface of the outer supporting ring seat; a pow output end of the second rotating motor is fixedly connected with the first supporting shaft rod, an other end of the first supporting shaft rod is provided with a first locking mechanism for position limitation.

Abstract: The present invention belongs to the technical field of control for rolling mill vibration, and particularly relates to a control device, system and method for vertical-horizontal coupling vibration of a corrugated rolling mill. The control device includes a housing; a vibration-absorbing container is arranged in the housing; a steel ball particle group is placed in the vibration-absorbing container; a left side of the vibration-absorbing container is connected with one end of a return spring; the other end of the return spring is fixedly connected with a third base; the third base is fixedly mounted on a third sliding block; and the third sliding block is slidably arranged on a third linear guide rail.

Abstract: Provided are an unequal-channel angular self-bending extrusion die and a method for designing and manufacturing the same and extrusion method thereof and includes following steps: designing a symmetrical streamlined extrusion die based on sine function; making the medial axis of the die cavity of the symmetrical streamlined extrusion die twisted and deformed on a certain plane; establishing the die cavity wall surface equation of the unequal-channel angular self-bending extrusion die; setting a working belt structure downstream the die cavity of the unequal-channel angular self-bending extrusion die.

Abstract: A lapping device for gear helix artifact with equal common normal by rolling method, use the rotary table to accurately control the angle between the lapping surface of whetstone and the axis of the base-circle cylinder to control the helix angle of base-circle about the involute helicoid. Use the whetstone driven component to drive the whetstone to make a high-precision linear motion in the vertical direction to adjust the position of the lapping surface of whetstone. The distance between the two lapping surface of whetstone is precisely adjusted by the gauge block to control the processing length of the three tooth common normal of the gear helix artifact. The invention provides a lapping device for gear helix artifact with equal common normal by rolling method, it conforms to the generation principle of the involute helicoid, and there is no machining principle error.

Abstract: The invention discloses an energy self-control base station for battery replacement based on solar power supply with independent UAV take-off and landing, which comprises a UAV take-off and landing device, an automatic battery replacement device and an energy supply device. The foldable solar panel structure is driven by a motor. The invention has simple structure and is convenient for automatic battery replacement. The UAV damage caused by UAV position deviation is effectively avoided when the platform descends. The invention adopts an electric mechanical claw to cooperate with a liftable battery compartment, so as to automatically replace UAV batteries. After the electric mechanical claw is aligned with the predetermined position, the batteries can be grasped and placed by lifting the battery compartment or the annular lifting platform, which simplifies the mechanical structure of the automatic battery replacement device.

Abstract: The present invention belongs to the field of power system operations and provides a method for quantifying the flexibility demand and coordinating optimization of a hydro-wind-solar multi-energy complementary system. Firstly, the flexibility demand quantification method considering the uncertainty of wind and solar power output is constructed, and the wind and solar power output interval is divided by using quantile points to generate a set of output scenarios, and then the flexibility demand under each scenario is calculated. Based on the quantitative index of flexibility demand, an optimal operation model of hydro-wind-solar complementary system considering the minimum expectation of system flexibility deficiency is constructed to realize the optimal calculation of hydro-wind-solar complementary. By utilizing an actual wind-hydro complementary system of the Yunnan Power Grid, the model is validated for different new energy access ratios.

Abstract: The present application relates to a bidirectional digital switching power amplifier based on a magnetic suspension drive platform and its multi-step current predictive control method. The control method includes the following steps: establishing a prediction model of a bidirectional digital switching power amplifier; introducing a feedback correction term for a closed loop prediction; calculating an optimal modulation duty cycle through a value function; generating, according to the obtained modulation duty cycle, four PWM drive signals by a pulse width modulation module to control four switch tubes respectively to achieve current prediction control. The present application effectively improves the system control accuracy with small steady-state error, small on-line computation amount, simple algorithm, easy digital realization, and good practical value and application prospect.

Abstract: An optical film for a sub-millimeter light emitting diode (MiniLED) backlight module and a method for preparing the optical film are disclosed. The MiniLED backlight module includes a diffusion film, an optical film, a reflection film and MiniLED chips. The diffusion film is provided above the optical film. The reflection film is provided under the MiniLED chips. The MiniLED chips are provided between the reflection film and the optical film. The first end of the optical film includes multiple first microstructures. The second end of the optical film includes multiple second microstructures. In the disclosure, photoresists are spin-coated on one end of an optical film substrate. A lithography direct write process is adopt to form a microstructure morphology on the surface of the OCA. The morphology is cured after development and hot baking to obtain an optical film.

Abstract: An ABE method with multiple tracing attribute authorities: performing, by a central authority, system initialization to generate a public parameter and disclosing the public parameter; performing, by each of attribute authorities, initialization to generate a key pair, and disclosing a public key in the key pair; performing, by a data owner, symmetric encryption on plaintext data, performing ABE on a symmetric key based on a hidden access structure, and generating an integrity verification value; requesting, by a data user, a decryption key to the attribute authority according to an own attribute; restoring, by the data user in response to decryption, an access structure, generating an outsourcing decryption key, sending the outsourcing decryption key to a cloud storage center for semi-decryption; generating, by the cloud storage center, a semi-decrypted ciphertext, and feeding the semi-decrypted ciphertext back to the data user; fully decrypting the semi-decrypted ciphertext according to a private decryption

Abstract: A method for measuring the diameter of filament diffraction fringes by frequency domain calculation comprising: building a set of diffraction optical path measurement system and capturing diffraction fringe images; determining the starting point of the imaging range; Simulating the electromagnetic field propagation process in Fraunhofer diffraction, and determining the optimal fringe range considering the noise caused by the difference in CCD sensitivity; Finally calculating the filament diameter by Fourier transform for different lengths of fringe. The final value of the calculated filament diameter is obtained by fitting an envelope to the variation of the diameter. The invention is simple in calculation and has little dependence on the experimental device, which means the superiority of using the frequency domain for parameter measurement, and the measurement accuracy is in the sub-nanometer level.

Abstract: The present disclosure relates to a stray light suppression device for bathymetric LiDAR onboard unmanned shipborne, belonging to the technical field of LiDAR water depth detection, particularly to a stray light suppression device for bathymetric LiDAR onboard unmanned shipborne. The device comprises an optical system component, a first objective lens barrel, a second objective lens barrel, a spectroscope barrel, a first eyepiece barrel a, a first eyepiece barrel b, a second eyepiece barrel a, a second eyepiece barrel b, a PMT detector a, a PMT detector b and a spectroscope supporting structure. Stray light suppression of an optical system with minimal field-of-view is realized, and stray light propagated by first-order, second-order and third-order scattered light paths is suppressed, so that a water depth detection capability of the bathymetric LiDAR onboard unmanned shipborne is improved and a dynamic detection range is expanded.

Abstract: A preparation method of zaleplon is provided and belongs to the technical field of pharmaceutical chemistry. The preparation method adopts simple and cheap m-nitrobenzaldehyde and triethylamine as raw materials, and constructs a core structure of zaleplon with high efficiency and high selectivity through a one-pot series reaction without transition metal catalysis, thereby avoiding the formation of isomers, reducing the generation of by-products, increasing the yield of target products and reducing the synthesis cost; and after simple nitro reduction modification, zaleplon is prepared. The method has the advantages of short preparation route, mild reaction conditions and simple operation, so the method is suitable for industrial production.

Abstract: Disclosed is a test method for measuring a force situation of a tree-shaped spatial node, and the test method is realized by a reaction frame device. The reaction frame device includes a raft foundation and a reaction frame fixedly mounted on the raft foundation, a cavity is formed inside the reaction frame to accommodate a tree-shaped spatial node; a main pipe of the tree-shaped spatial node is plumb-fastened to the raft foundation, and a force measurement assembly is arranged in an upper space of the cavity, which can simultaneously apply force of a set value to each branch pipe in the tree-shaped spatial node and detect a combined force applied to the tree-shaped spatial node. The method can simultaneously and accurately apply static force to each branch pipe, thereby effectively predicting the overall working condition of the tree-shaped spatial node.

Abstract: Disclosed is a method for analyzing changes in urban economic development characteristics of an urban agglomeration based on nighttime light remote sensing according, including: building a Gross Domestic Product (GDP) spatialization model: spatializing GDP of an urban agglomeration region by using an industry-based modeling approach, modeling spatialization of a primary industry output GDP1 with land use data, and modeling spatialization of a secondary and tertiary industry output GDP23 by selecting an optimal light index on the basis of nighttime light data; measuring an increase or a decrease of a specific variable over time at a pixel level using trend analysis; and modifying a gravity model that reflects an economic linkage strength between cities. The present disclosure can provide data support and methodological basis for the high-quality economic development of the urban agglomeration.

Abstract: An electrocardiograph (ECG) signal quality evaluation method based on a multi-scale convolutional and densely connected network is provided. Firstly, an original ECG signal is preprocessed to remove a baseline drift and power line interference. Then, based on a consistency principle of a label determining result and a principle of setting a confidence coefficient, an AlexNet model is trained to mutually correct incorrect labels in a dataset to obtain a final ECG signal fragment for quality classification. Finally, the signal fragment is input into an improved lightweight densely connected quality classification model to classify quality of the ECG signal fragment.

Abstract: A frequency domain feedforward compensation method based on a power exponential method for a seismic simulation shaking table is provided. According to the method, a frequency domain amplitude transfer function of a system is identified, the frequency domain amplitude transfer function is modified by adjusting the power and limiting an amplitude, then an inverse frequency domain amplitude transfer function is obtained, an amplitude and a phase of a driving acceleration signal are computed, finally a time domain driving acceleration signal is obtained by using the Euler's formula for computation in a complex domain and conducting inverse Fourier transform, the shaking table is driven again to collect an acceleration signal output by a table top, whether the acceleration signal meets a shaking table test waveform use requirement is determined, a test is finished under the condition that the acceleration signal meets the shaking table test waveform use requirement.