Abstract: The present invention relates to a slanting-bed feed processing machine tool of a large propeller. The machine tool comprises a slanting column feed bed, a machine tool spindle, a workpiece rotary worktable, a large propeller and a bed feed mechanism. The present invention coordinates the geometrical relationship between the machine tool and the large propeller to ensure that the slanting column feed bed moves between two blades, thereby reducing the overhang length of the spindle. Different forms of workpiece rotary worktables and bed feed mechanisms are selected according to different slanting column feed beds. Four types of slanting column feed beds are designed, which can be selected, optimized and applied for different processing objects. The present invention enhances the processing stiffness of the spindle and solves the problem of poor processing quality of the large propeller caused by machine tool vibration.

Abstract: The present invention relates to a method for preparing a simply prepared, safe, nontoxic, and biodegradable modified starch; the present invention further relates to use thereof as an adsorbent in adsorbing heavy metal ions and organic compounds, and belongs to the technical field of modified starch material. Starch is used as raw material and modified with thiourea and tungsten chloride; the starch binds to heavy metal ions through a series of coordination or chelation, and thus produces a heavy metal ion adsorption effect; a starch-based carbon composite is prepared, i.e., a modified starch composite. The simply prepared, environmentally friendly, and recyclable modified starch adsorbent with excellent performance and higher practical value effectively removes He ions and such organic compounds as methylene blue from the wastewater; the modified starch adsorbent is expected to develop into a novel water treatment agent due to low loss rate, biodegradability, and recyclability.

Abstract: A method and apparatus for passive pin positioning of a reconfigurable forming die is disclosed. The apparatus may include a plurality of pins disposed within a frame, and a bolt that when tightened can secure or lock the pins into position. When the bolt is loosened, the position of the pins can be adjusted. A preliminary model of a contoured surface that is to be imparted to an article by the reconfigurable forming die can be used to help define a forming surface of the reconfigurable die.

Abstract: An aeronautical aluminum alloy minimum-quantity-lubrication milling machining device includes a machine tool worktable and spindle connected with a machine tool power system. The spindle is connected with a tool holder that is fixed with a cutting tool. The machine tool worktable is provided with a machine tool fixture, the tool holder is connected with a minimum-quantity-lubrication mechanism, the machine tool fixture includes a fixture body that is fixedly provided with a limit block for contact with two adjacent side surfaces of a workpiece, the fixture body is provided with a plurality of clamping elements capable of pressing the workpiece against an upper surface of the fixture body, and a top of the clamping element is provided with a detection member for detecting a relative position between the clamping element and the spindle. The device can avoid interference and contact between a nozzle and the clamping element.

Abstract: A processing device for film cooling holes on blade of aviation engine includes a working box. A workpiece clamping mechanism is arranged in the working box for holding the workpiece. A cover body having an internal space communicated with an internal space of the working box is connected to an upper part of the working box. A laser processing mechanism is connected to a top end of the cover body and can produce laser rays to carry out laser processing on the workpiece. The cover body is connected to a liquid supply mechanism and an acid gas filtration mechanism. The liquid supply mechanism can spray an acidic solution to the workpiece in the working box, and the working box can collect the acidic solution. The acid gas filtration mechanism can filter acid steam produced during processing. A working method of the processing device is also provided.

Abstract: A test device for an automatic pressure regulating valve of an electronic braking system includes a test device composed of an air supply, a pneumatic circuit, a valve, a sensor, a signal processing unit, and a control unit. By subjecting an automatic pressure regulating valve to a bench test including a functional test, a static performance test, a dynamic performance test, an air tightness test, a leakage test, and a brake chamber braking force test, the present disclosure avoids the high risk of a field test, improves the test efficiency, and ensures the test consistency. An automatic pressure regulating valve is tested before being loaded on a vehicle, and parameters of the automatic pressure regulating valve are continuously modified through tests to improve the performance, such that the automatic pressure regulating valve can meet the real-time, fast, independent, and accurate regulation requirements of EBS of commercial vehicles.

Abstract: The present invention provides a system and a method for simulating formation and evolution of a deep-sea cold seep ecosystem. Simulation of the cold seep ecosystem is realized and a unit above seabed interface, a seabed interface ecosystem simulation unit, and a subsea interface unit is formed through the system, which provides environmental conditions for evolution of the cold seep ecosystem. At the same, the primary succession and secondary succession of the ecological cold seep system are simulated through the environmental condition control equipment, the sampling cabin, and the seabed current injection system, and the formation environment of the system is remodeled in situ, thereby effectively shortening the period of field observation to research the cold seep ecosystem.

Abstract: A method for constructing and training a Decentralized Migration Diagram Neutral Network (DMDNN) model for a production process, including: determining a production task input management node, distributed management nodes and a granularity of each of the distributed management nodes, and constructing a production system network; constructing network calculation nodes on each of the distributed management nodes; constructing and training a DMDNN model; and applying the trained DMDNN model in management and control of the production process.

Abstract: An XY macro-micro motion stage and a control method thereof based on end feedback. The XY macro-micro motion stage includes a fine-adjusting assembly, a macro-driving assembly and an XY position detecting device. The macro-driving assembly includes an X-direction macro-driving unit, a Y-direction macro-driving unit, an X-direction mounting plate and a Y-direction mounting plate. The XY position detecting device is configured to obtain its position on the X axis and Y axis.

Abstract: A polyarylether-based polymer with side chain in methoxypolyethylene glycols structure, a solid polymer electrolyte and preparation methods therefore are disclosed. The main chain of the polymer has a polymer structure containing a polyarylether group, the side chain has a methoxypolyethylene glycols structure, and the structural formula of the polyarylether-based polymer is as follows: and the preparation method for the polyarylether-based polymer with side chain in methoxypolyethylene glycols structure comprises: step (1): preparing a polymer containing a polyarylether group; and step (2): dissolving the polymer containing a polyarylether group and methoxypolyethylene glycols in a solvent, then adding a catalyst, dripping a co-catalyst after the catalyst is dissolved, and conducting reaction while stirring to obtain the polyarylether-based polymer with side chain in methoxypolyethylene glycols structure.

Abstract: The invention discloses a non-linear Lamb wave mixing method for measuring stress distribution in thin metal plates. The method is suitable for stress distribution detection and stress concentration area positioning in a plate structure and belongs to the field of nondestructive detection.

Abstract: The present invention belongs to the technical field of constructional engineering safety detection, and provides a method for detecting hollowing of an exterior wall finish layer. The method for detecting a defect of a facade finish layer of a building proposed by the present invention can realize remote detection in the on-site detection operation and avoid high-altitude hazardous operation of personnel, and is simple and convenient in operation. In data analysis and processing, the method not only can overcome the subjectivity and the instability caused by manual color identification of a temperature image, but also can realize batch processing of image analysis through software or conduct real-time detection and analysis.

Abstract: The present invention provides a method of manufacturing a graphene nanosphere through a single process that is simplified in order to enable mass production. The method includes step 1 of manufacturing a silicon carbide nanosphere coated with graphene through chemical vapor deposition (CVD) using a gas containing a silicon source and a carbon source and step 2 of discontinuing the chemical vapor deposition (CVD) and then performing cooling.

Abstract: A system for producing high-quality gas includes a heat carrier hoist, a coke feeder, a heat carrier heating furnace, a gas mixer, a high-temperature induced draft fan, a heat carrier storage tank, a dryer, a hopper, a concentrating solar collection pyrolysis-gasification reactor having a double-tube structure, a three-phase separator and a coke collecting bin. The system may use an adjustable concentrating solar collection technology in combination with a heat carrier circulation heating process, so as to effectively solve heat requirements of the waste pyrolysis and gasification process, reduce the waste material consumption caused by energy supply, and improve the effective utilization of raw materials.

Abstract: This invention belongs to the technical field of composite materials, and discloses a xylan-based dual network nanocomposite hydrogel, preparation method thereof and use therefor. The method comprises (1) adding graphite oxide powder into deionized water, ultrasonically dispersing to obtain a GO aqueous dispersion; (2) adding xylan into deionized water, heating and stirring to obtain a xylan solution; (3) adding a water-soluble calcium salt, a reaction monomer and the xylan solution into the GO aqueous dispersion, and stirring and dispersing uniformly under an ice-bath condition, then adding an initiator, a crosslinking agent and an accelerator, stirring and mixing uniformly to obtain a mixed solution; and 4) drying and reacting the mixed solution (in the step (3) to obtain a xylan-based dual network nanocomposite hydrogel.

Abstract: A micro-region semi-solid additive manufacturing method is provided, where rod-shaped materials are used as consumables, and front ends of the consumables are heated by means of high-energy beam, an electric arc, a resistance heat, or the like, to enable the front ends to be in a semi-solid state in which the solid-liquid two phases coexist; at the same time, the rotational torsion and the axial thrust are applied to the consumables to perform shearing, agitation and extrusion on the semi-solid front ends, that is, the mold-free semi-solid rheoforming is performed. The consumable is transmitted to the bottom layer metal continuously in this manner to form metallurgical bonding, the stacking process is repeated according to a planned route obtained after discretization slicing treatment, and then an object or a stack layer in a special shape can be formed.

Abstract: According to the method of estimating a maximum road friction coefficient, artificial braking or driving-related control is conducted and a maximum road friction coefficient is estimated based on a difference in wheel speeds between front and rear wheels, compensated for slip of tires.

Abstract: The present invention further discloses an application of Saccharomyces cerevisiae in the fermentation of a second generation fuel, ethanol, with a straw lignocellulose biomass hydrolysate as a raw material. Experiments prove that the strain of the prevent invention has an efficient co-fermentation capacity of C6/C5 while tolerating multiple inhibitors, and can consume all the glucose and xylose to produce ethanol; and the sugar-alcohol conversion rate is up to 0.43 g g?1. The strain and screening strategy used in the present invention provide technical reference and basis for the further breeding of a Saccharomyces cerevisiae strain which has a superior fermenting property and is produced by the second generation fuel, ethanol.

Abstract: Metal ion-directed carboxylic acid functionalized polyoxometalate hybrid compounds, and their preparation method and applications in catalyzing the degradation of chemical warfare agent simulants. In the synthesis, Na2MoO4, p-hydroxybenzonic acid (PHBA), alanine (Ala), KCl, transition metal cations and As2O3 as raw materials and water are used as solvent. At room temperature, 2-chloroethyl ethyl sulfide (CEES) and the prepared polyoxometalate hybrid compounds were mixed together in anhydrous ethanol and stirred, and H2O2 was subsequently added into the reaction system. The catalytic reaction for the degradation of CEES was finished within 5 min under stirring. In the catalytic hydrolysis of diethyl cyanophosphonate (DECP), the catalyst, DECP, DMF and H2O were put together and mixed fully. The prepared polyoxometalate hybrid compounds have the advantages of high conversion, high selectivity and easy recyclability in catalyzing the degradation of two types of chemical warfare agent simulant.

Abstract: Provided is an integrated shape/property control method for hot power spinning of a cylindrical part based on a hot processing map.