Abstract: Disclosed is a multi-layer rolled composite board, comprising a transition layer provided between two adjacent composite layers, wherein the transition layer is an anisotropic steel sheet. Also disclosed is a manufacturing method for the multi-layer rolled composite board, the method comprising the following steps: (1) providing a transition layer between adjacent composite layers to assemble a blank, and creating a vacuum between the layers; and (2) performing composite rolling, comprising: heating the blank to 1100-1260° C. and maintaining the temperature for 0.6 h or above, then performing hot rolling at a temperature of Ar3 or above, with the final rolling temperature being controlled to be higher than 820° C., cooling at a speed of 30-100° C./s after rolling, and then coiling, with the coiling temperature being controlled to be 20-750° C.

Abstract: This application discloses an adapter assembly and an optical communications device, and belongs to the field of connector technologies. The adapter assembly is configured to be installed on a hole of a panel, and the adapter assembly includes: an MT/MPO adapter, where the MT/MPO adapter includes a flange plate, an MT port, and an MPO port, the MT port and the MPO port are respectively located on two sides of the flange plate in a thickness direction, and the MPO port is configured to be connected to an MPO plug; and an MT plug, where the MT plug includes an MT optical fiber and an MT clamp that are connected, and the MT plug is connected to the MT port. The flange plate is made of conductive plastic. This application can shield an electromagnetic wave in the optical communications device.

Abstract: A lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, all of which are arranged in order from an object side to an image side along an optical axis. The first lens is with positive refractive power and includes a convex surface facing the object side. The second lens is with negative refractive power and includes a concave surface facing the image side. The third lens is with refractive power and includes a convex surface facing the image side. The fourth, fifth, and sixth lenses are with refractive power. The lens assembly satisfies: 2 mm<f5+f6<35 mm, wherein f5 is an effective focal length of the fifth lens and f6 is an effective focal length of the sixth lens.

Abstract: Disclosed is a high corrosion-resistance strip steel, comprising a carbon steel base layer and a corrosion-resistance cladding layer roll-bonded with the carbon steel base layer, the corrosion-resistance cladding layer being austenitic stainless steel or pure titanium, the thickness of the corrosion-resistance cladding layer being 0.5% to 5% of the total thickness of the strip steel. In addition, further disclosed is a manufacturing method for the described high corrosion-resistance strip steel, comprising the steps of: (1) obtaining a base layer material and a cladding layer material; (2) assembling billets (3) pre-heating: pre-heating the billets at a temperature of 1150° C. to 1250° C., so that elements of the corrosion-resistance cladding layer and elements of the carbon steel base layer diffuse at the interface to form a stable transition layer, and then slowly cooling to room temperature; (4) secondary heating and rolling; and (5) water-cooling and then winding.

Abstract: A pedestrian adaptive zero-velocity update point selection method based on a neural network, including the following steps: S1, collecting inertial navigation data of different pedestrians in different motion modes; S2, preprocessing the inertial navigation data collected in the step S1, labeling the preprocessed data, and obtaining a training data set, a validation data set, and a test data set according to the preprocessed data and a label corresponding to the preprocessed data; S3, inputting the training data set to a convolutional neural network for training, obtaining a pedestrian adaptive zero-velocity update point selection model based on the convolutional neural network, and using the validation data set to validate the pedestrian adaptive zero-velocity update point selection model; and S4, inputting the test data set into the pedestrian adaptive zero-velocity update point selection model based on the convolutional neural network, and obtaining a selection result of pedestrian zero-velocity update poi

Abstract: Disclosed is zero point compensation method and device for EPS. The method includes: acquiring a value of lateral distance when a vehicle travels along an ideal path and obtaining a smoothed lateral distance value, for each control cycle; calculating a longitudinal movement distance value of the vehicle for each control cycle; performing linear fitting to obtain a linear relationship between the longitudinal movement distance value and the smoothed lateral distance value; calculating a zero point compensation angle for the EPS based on a first parameter in the linear relationship and a preset steering wheel transmission ratio, and compensating a steering control angle; and determining that the zero point compensation angle passes verification when a minimum residual error is less than a preset acceptable deviation. In this way, the time required for calibration can be reduced, and the accuracy and effectiveness of the control algorithm can be improved.

Abstract: The disclosure discloses a method for an addition reaction of acetylene and a ketone compound. The method includes the following steps: S1, providing a continuous reaction device, wherein the continuous reaction device includes a plurality of bubble tubular reactors being connected with each other through connecting tubes; feeding a raw material solution containing the ketone compound and alkali into the plurality of bubble tubular reactors, and S3, under normal pressure, pumping acetylene from the bottom of the first bubble tubular reactor for the addition reaction. By applying the technical solution of the invention, acetylene reacts with the ketone compound in the plurality of bubble tubular reactors arranged in series, which can ensure the sufficient gas-liquid contact time, and thus making full use of the acetylene gas, improving the utilization rate thereof, effectively reduing the amount of acetylene, reducing costs, and further improving the safety.

Abstract: A Raney copper catalyst, a preparation method and use thereof are provided. The Raney copper catalyst includes aluminum, copper and a metal promoter, wherein the metal promoter comprises a combination of one or more of Ni, Fe, Mo, Co, Ag, Pd, Pt, Au and other elements. The preparation method includes performing high-temperature melting on a mixture containing a copper/aluminum alloy and the metal promoter to obtain a mixed metal cured compound, then smashing the mixed metal cured compound to obtain a catalyst precursor, and subsequently activating to obtain the Raney copper catalyst. The Raney copper catalyst exhibits a capability on hydrogenation reaction based on synergistic effects between metal copper and different promoter metals. Compared with the Raney copper catalyst without metal promoters, when used for preparing 1,3-propanediol through hydrogenation of 3-hydroxypropionaldehyde aqueous solution, the Raney copper catalyst is higher in activity and better in stability.

Abstract: A magnetic soil remediation agent for soil heavy metal pollution and a preparation method and application thereof are provided. The magnetic soil remediation agent is prepared by using remediation agent framework material and magnetic core material as raw materials, and heavy metal collector as modifier; said framework material is silicon dioxide activated by strong alkali; said magnetic core material comprises magnetic materials Fe3O4 and ?-Fe2O3; said modifier comprises ethylenediaminetetraacetic acid (EDTA, nitrilotriacetic acid trisodium salt (NTA, (S,S)-ethylenediamine-N,N-disuccinic acid trisodium salt (EDDS) and mercaptoethylamine. The remediation agent of the present invention can effectively passivate the heavy metals in the soil, reduce their available contents, and inhibit the absorption of heavy metals by plants.

Abstract: An electric ice press is provided herein and may be utilized to reshape an initial ice billet into a sculpted ice nugget. The electric ice press may include a mold body having a first mold segment and a second mold segment movable relative to each other. Each mold segment may define a heater cavity that is configured for receiving a ceramic annular heater for heating the mold body to form the sculpted ice nugget.

Abstract: An ice making assembly includes an ice mold including two or more separable portions that collectively define one or more mold cavities. Each of the mold portions define a plurality of recessed passages that at least partially surround the mold cavity and are configured to receive evaporator conduit of a sealed refrigeration to cool the ice mold and facilitate formation of an ice billet.

Abstract: The present disclosure relates to the technical field of cable inspection, and specifically, to a cable trench inspection robot. The cable trench inspection robot includes a base spreading system, and a camera lifting system disposed on the base spreading system, where the base spreading system includes a base plate, a linear action unit, a cantilever plate, a walking assembly, and a jacking assembly, and the camera lifting system includes a travel block, an imitated four-bar assembly, a support rod, and a camera assembly. The present disclosure can realize a through-wall operation by using a cable trench, thereby avoiding many use problems caused by a firewall, and efficiently completing a predetermined inspection task.

Abstract: A precious metal-supported eggshell catalyst with a preparation method and an application are provided. The precious metal-supported eggshell catalyst includes a carrier, a precious metal and a promoter. As an active component, the precious metal and the promoter are evenly distributed on surface of the carrier, wherein the promoter includes one or more than two of a precious metal, an alkaline earth metal, a transition metal lanthanide series metal, an actinium series metal and/or a metal oxide thereof. With a highly utilization of the precious metal, the precious metal-supported eggshell catalyst showed high conversion, good selectivity and excellent stability, and the precious metal-supported eggshell catalyst is used more than 300 hours with no obvious loss of activity in preparing 1,3-propanediol through hydrogenation of 3-hydroxypropionaldehyde aqueous solution. Furthermore, with large particles the precious metal-supported eggshell catalyst is easily separated from reaction products.

Abstract: A double Schottky-barrier diode includes a semi-insulating substrate, a left mesa formed by growth and etching on the semi-insulating substrate, a middle mesa formed by growth and etching on the semi-insulating substrate, a right mesa formed by growth and etching on the semi-insulating substrate, two anode probes and two air-bridge fingers. The two Schottky contacts are closely fabricated on the same mesa (middle mesa) in a back-to-back manner to obtain even symmetric C-V characteristics and odd symmetric I-V characteristics from the device level. The output of a frequency multiplier fabricated using the double Schottky-barrier diode only has odd harmonics, but no even harmonics, which is suitable for the production of high-order frequency multipliers. The cathodes of the two Schottky contacts are connected by the buffer layer without ohmic contact.

Abstract: A lens assembly includes a lens body, a first lens, a second lens, a third lens and a fourth lens, wherein the lens body includes a lens barrel, and the first lens, the second lens, the third lens and the fourth lens are fixed in the lens body in order from an object side to an image side along an optical axis. The first lens is closest to the object side and includes an object side surface, the object side surface is protruded along the optical axis, the first lens further includes a first portion close to the object side and a second portion close to the image side, and a diameter of the first portion is smaller than a diameter of the second portion so that a step is formed between the first portion and the second portion.

Abstract: A magnetic soil remediation agent for soil heavy metal pollution and a preparation method and application thereof are provided. The magnetic soil remediation agent is prepared by using remediation agent framework material and magnetic core material as raw materials, and heavy metal collector as modifier; said framework material is silicon dioxide activated by strong alkali; said magnetic core material comprises magnetic materials Fe3O4 and ?-Fe2O3; said modifier comprises ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid trisodium salt (NTA), (S,S)-ethylenediamine-N,N-disuccinic acid trisodium salt (EDDS) and mercaptoethylamine. The remediation agent of the present invention can effectively passivate the heavy metals in the soil, reduce their available contents, and inhibit the absorption of heavy metals by plants.

Abstract: A lens assembly includes a first lens group, a second lens group, a third lens group, a fourth lens group, and a reflective element. The first lens group is with refractive power. The second lens group is with positive refractive power. The third lens group is with positive refractive power. The fourth lens group is with refractive power. The reflective element includes a reflective surface. A light from an object sequentially passes through the first lens group, the second lens group, the third lens group, and the fourth lens group to an image side along an axis. The reflective element is disposed between an object side and the image side along the axis. Intervals of the lens groups are changeable when the lens assembly zooms from a wide-angle end to a telephoto end.

Abstract: Systems are configured for generating text-to-speech data in a personalized voice by training a neural text-to-speech machine learning model on natural speech data collected from a particular user, validating the identity of the user from which data is collected, and authorizing requests from users to use the personalized voice in generating new speech data. The systems are further configured to train a machine learning model as a neural text-to-speech model with generated personalized speech data.

Abstract: The present disclosure provides a device for continuously preparing 2,6-dihydroxybenzaldehyde and use thereof. The device includes a first continuous reaction unit for hydroxy protection reaction, a second continuous reaction unit for lithiation and hydroformylation, and a third continuous reaction unit for deprotection reaction that are connected in series. The third continuous reaction unit includes: a first columnar continuous reactor, connected to the second continuous reaction unit and used for deprotection of the lithiated hydroformylated product while performing liquid separation to obtain an organic phase containing 2,6-dihydroxybenzaldehyde and an aqueous phase. When the device is applied in the preparation of 2,6-dihydroxybenzaldehyde, reaction time is shortened and the intermediate purification treatment is no longer required.

Abstract: An ice making assembly includes an ice mold and a pump assembly for urging an ice-building spray into the ice mold to form an ice billet. A controller operates the pump assembly to provide the ice-building spray at a first flow rate until the ice billet reaches a predetermined thickness and then operates the pump assembly to provide the ice-building spray at a second flow rate that is less than the first flow rate.