Abstract: The present disclosure relates to the field of additive manufacturing and superalloys, particularly to a method for eliminating cracks in René 104 nickel-based superalloy prepared by laser additive manufacturing. For solving the problem that cracks are easily generated during laser additive manufacturing of René 104 nickel-based superalloy with high content of Al and Ti (Al+Ti>5 wt. %), generation of large-size cracks inside a fabricated part is suppressed by means of designing laser forming parameters and a partition scanning strategy; then stress relief annealing is performed to completely eliminate residual stress inside the fabricated part; and a spark plasma sintering process is performed to eliminate cracks inside the fabricated part and suppress the growth of grains during the sintering process.

Abstract: The invention provides a complete set of treatment system and method for deep utilization of dolomite resources. The system includes a primary calcination device, a carbon dioxide capture device, a digestion device, a carbonization separation device, a pyrolysis device and a secondary calcination device; the primary calcination device includes a dolomite calciner, a plurality of hoardings and an exhaust pipe, and an exhaust chamber is formed between the hoardings, the top of the dolomite calciner and the outer wall of the blanking bin; the exhaust chamber is in communication with the carbon dioxide capture device through the exhaust pipe; the carbonization separation device includes a carbonization reaction tank whose gas inlet is in communication with the gas outlet of the carbon dioxide capture device; and the pyrolysis device includes a pyrolysis kettle and a vacuum pump which maintains a negative pressure state in the pyrolysis kettle.

Abstract: The present invention discloses a full-gradient nickel cobalt manganese positive electrode material, a ruthenium oxide coated material and a preparation method thereof. The material has a chemical formula of LiNixCoyMn(1-x-y)O2, wherein, 0.5?x?0.9, 0.05?y?0.40, 1-x-y>0. A content of the nickel element is gradually decreased from a core portion to an outer surface of the full-gradient nickel cobalt manganese positive electrode material. A content of the manganese element is gradually increased from the core portion to the outer surface of the full-gradient nickel cobalt manganese positive electrode material. And, a content of the cobalt element is uniformly distributed in the full-gradient nickel cobalt manganese positive electrode material. The present invention also discloses a preparation method of the full-gradient nickel cobalt manganese positive electrode material. The present invention also discloses a preparation method of the ruthenium oxide coated material.

Abstract: A type of high-strength and ductile multicomponent precision resistance alloys and fabrication methods thereof are provided. The alloys are composed of the following components by atomic percentage: Ni 45-60%, Cr 15-30%, Fe 5-20%, Al 5-15%, Mn 3-5%, Cu 0.2-3%, Si 1-5%. Particularly, the sum of the atomic percentages of Mn, Cu and Si is ?13% and ?4.2%, the sum of the atomic percentages of Ni, Cr, Fe and Al is ?70% and ?95.8%, and the sum of the atomic percentages of all the components is 100%. The multicomponent alloys prepared by the methods exhibit face-cantered cubic matrix and possess high strength and good ductility; further, they have high resistivity and excellent resistivity stability in wide temperature ranges below 773 K.

Abstract: A microelectrode sensor for detecting Staphylococcus aureus and a preparation method and an application method thereof are provided. The microelectrode sensor is a three-electrode system sensor with a platinum wire electrode as a counter electrode and an Ag/AgCl electrode as a reference electrode, and a working electrode is a silver microelectrode modified by chitosan, catechol and Staphylococcus aureus aptamers. The microelectrode sensor is constructed based on the microelectrode with micro/nano structure on the surface, dual media (Fc-Ru3+), chitosan, and catechol. The working electrode can specifically capture Staphylococcus aureus. During the CV test of the microelectrode sensor, the Cl? in bacteria will be leaked to a surface of the working electrode under the action of local high-field strength, and when Cl? ions exists, the cathodic reduction peak of the working electrode can be specifically enhanced between 0 to ?0.1 V, the goal of specific detection of bacteria can be achieved.

Abstract: Disclosed are a train compartment air adjustment and control method and apparatus, and a storage medium and a program product. A ventilation system is adjusted according to microbial diffusion situations among various test points, so as to reduce a microbial pollution index of an area where passengers are located. The method has a guide effect on railway train air quality adjustment and control. By means of the present invention, a mapping relationship between microbial pollution and the concentration of atmospheric pollutants is studied, the problem of the real-time performance of microbial detection can be effectively solved, and the real-time adjustment and control of microbial pollution in a train compartment are guaranteed.

Abstract: A concentrated solar power generation system includes a movable platform having a groove, a Fresnel lens located in the groove of the movable platform, a header located below the Fresnel lens, a plurality of heat collection tubes arranged in a circular array, a reflector with a tapered surface, and a support base. The header has a water circulation pipe, an inlet pipe and an outlet pipe. The inlet pipe and the outlet pipe each are communicated to the water circulation pipe. A lower end of each of the heat collection tubes is fixed on the support seat, and an upper end of each of the heat collection tubes contacts the water circulation pipe. The reflector is mounted on the support base and located in a space enclosed by the heat collection tubes.

Abstract: The present invention provides a rare earth hard alloy and a preparation method and application thereof. The rare earth hard alloy includes 6 to 15 wt % of a binding phase and the balance of a hard phase, wherein the binding phase includes 30 to 50 wt % of Ni3Al, 0.1 to 0.5 wt % of a rare earth element and the balance of Ni. According to the rare earth hard alloy provided by the invention, the Ni—Ni3Al-rare earth element (e.g., Ni—Ni3Al—Y)-based binding phase is strengthened by Ni3Al, and an ordered strengthening phase is formed and is diffused and distributed in the binding phase, such that the rare earth hard alloy has a better high-temperature oxidation resistance, a better room-temperature fracture toughness and a better high-temperature bending strength than a conventional hard alloy.

Abstract: Sound signal when a wave generated by a geo-acoustic event source reaches any monitoring point (S1), constructing a theoretical propagation difference model and an observed propagation difference model of the waveform characterization quantity between monitoring points, to calculate a waveform characterization quantity difference value between two monitoring points (S2); and constructing an objective function based on the theoretical propagation difference model and the observed propagation difference model, and obtaining the location of the geo-acoustic event by means of inversion based on the objective function (S3).

Abstract: Disclosed are a slow-release inhibitor for high-magnesium sulfide mineral flotation and an application thereof, where the inhibitor is a nano colloidal particle of an alkaline earth fluoride such as CaF2 and BaF2 or a highly-reactive natural alkaline earth metal mineral powder. When applied to the flotation separation of a high-magnesium sulfide ore, the inhibitor can slowly release F ions to preferentially form a MgF2 layer on the magnesium-containing mineral surface, which provides a structure similar to MgF2 on a surface of oxidized gangue minerals such as magnesium oxide, changing surface electrical property of the magnesium-containing mineral, inhibiting heterogeneous coagulation of magnesium-containing minerals and sulfide ores due to electrostatic attraction and reducing entrainment, enveloping and agglomeration of gangue minerals to efficiently inhibit the flotation of oxidized gangue minerals such as magnesium oxide.

Abstract: A method for detecting gas concentration in a glass bottle with dynamical threshold adjustment is provided includes acquiring second harmonic peaks P0, Pa, PX in the glass bottle, calculating absolute values of the differences between P0 and Pa, as well as between P0 and PX, and performing quality inspection on a glass bottle to be detected. The performing includes collecting the second harmonic peaks for the glass bottle to be detected, calculating a mean PL of elements in the current queue L, updating the second harmonic peak Pa and the second harmonic peak PX, collecting second harmonic peaks for a current glass bottle to be detected, and determining whether the current glass bottle to be detected is an acceptable medicinal bottle based on the updated data and the collected second harmonic peaks.

Abstract: A use of sorafenib or regorafenib or an analogue or a derivative thereof in the preparation of pharmaceuticals for treatment of myeloproliferative neoplasms. The myeloproliferative neoplasms are polycythemia vera or myeloproliferative neoplasms having drug resistance.

Abstract: A use of Sorafenib or a derivative thereof in the preparation of a medication for the prevention and/or treatment of type 1 diabetes.

Abstract: An urban remote sensing image scene classification method in consideration of spatial relationships is provided and includes following steps of: cutting a remote sensing image into sub-images in an even and non-overlapping manner; performing a visual information coding on each of the sub-images to obtain a feature image Fv; inputting the feature image Fv into a crossing transfer unit to obtain hierarchical spatial characteristics; performing convolution of dimensionality reduction on the hierarchical spatial characteristics to obtain dimensionality-reduced hierarchical spatial characteristics; and performing a softmax model based classification on the dimensionality-reduced hierarchical spatial characteristics to obtain a classification result.

Abstract: The present invention provides a method for testing the DNA of the source of the parasite in a sample, a method for diagnosing, using the testing method, whether a host object is suffered with a parasitic infection, a method for determining a treatment effect on a parasitic infection, and a method for screening a candidate treatment of a parasitic infection. Also provided is a kit for the methods.

Abstract: A method for crystallization of ?-ammonium tetramolybdate includes: performing a stepwise pH-adjusting treatment of an ammonium molybdate solution via zoning to obtain the ?-ammonium tetramolybdate. When feeding the ammonium molybdate solution into a reaction system from a first zone and then into second to sixth zones successively, pH1 of a resultant solution in the first zone is 7.0-6.0; pH2 of a resultant solution in the second zone is less than 6 and greater than or equal to 4; pH3 of a resultant solution in the third zone is less than 4 and greater than or equal to 2.5; pH4 of a crystallized slurry in the fourth zone is less than 2.5 and greater than or equal to 1; pH5 of a crystallized slurry in the fifth zone is 2.5-4.0; and pH6 of a crystallized slurry in the sixth zone is less than 2.5 and greater than or equal to 2.0.

Abstract: Technical fields of building external wall decoration and material manufacturing, providing a mildewproof and antirot high-strength cement particle board and a preparation method thereof. The preparation method includes: (1) sequentially carbonizing and water-washing a shaving, and mixing the obtained carbonized shaving with a cement gelling agent, a curing agent aqueous solution and water to obtain a mixture; (2) molding the mixture to obtain a pre-molded material; and (3) sequentially curing and drying the pre-molded material to obtain the mildewproof and antirot high-strength cement particle board. Compared to ordinary cement particle board, which is not subjected to carbonization treatment and water-washing, the cement particle board of the present invention can effectively avoid mildew and rot, and can significantly improve the mechanical strength and durability thereof, helping to extend the service life of the cement particle board.

Abstract: In a distance control method of relative motion between satellites, by reducing the distance between a companion satellite and a reference satellite through the first position relation, and increasing the distance between a companion satellite and a reference satellite according to the second position relation, the distance between satellites can be kept between the set maximum distance and the minimum distance. In this way, on the one hand, the inter-satellite distance cannot be too large to ensure that the two satellites are within the maximum distance range required by communication or other cooperative relations. At the same time, the inter-satellite distance cannot be too small, and further avoid the collision between the two satellites. The method is capable of tolerating the effect of satellite orbit perturbation, allowing the inter-satellite distance to vary naturally between maximum and minimum distances, and thus saving control fuel consumption.

Abstract: A method for recycling spent carbon cathode of aluminum electrolysis includes the following steps: (1) crushing and sieving spent carbon cathode, to obtain carbon particles; (2) mixing the carbon particles with a sulfuric acid solution, to obtain a slurry A, and then performing pressure leaching, to obtain a slurry B; (3) evaporating and concentrating the slurry B until a mass percentage of water is lower than 8%, to obtain a slurry C; (4) adding concentrated sulfuric acid to the slurry C to obtain a slurry D, then roasting the slurry D at 150-300° C. for 0.5-10 h, and then roasting at 300-600° C. for 0.5-8 h, to obtain the roasted carbon; and calcining the roasted carbon at a high temperature, to obtain the purified carbon, or mixing the roasted carbon with a leaching agent, and performing leaching, filtering, and washing, to obtain the purified carbon.

Abstract: An electrochemical method and an apparatus for extracting lithium from a solution using bipolar electrodes are provided. The apparatus adopts electrodes respectively coated with a lithium-rich electroactive material and a lithium-deficient electroactive material as end plates, which are separated by a plurality of bipolar electrodes coated with a lithium-rich electroactive material and a lithium-deficient electroactive material respectively on two sides, where the side of the bipolar electrode facing the end plate of the lithium-rich electroactive material is coated with the lithium-deficient electroactive material, and the side of the bipolar electrode facing the end plate of the lithium-deficient electroactive material is coated with the lithium-rich electroactive material. The apparatus adopts a conventional voltage, requires a small total current and a simple power supply, greatly reduced the amount of busbar required, allows for easy process control, and is suitable for industrial production.