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The invention discloses a hydrocracking catalyst and a preparation method thereof. The preparation method comprises the following steps: 1, dipping aluminum hydroxide xerogel powder used in a carrier in a solution containing a hydrogenation metal component; 2, drying the powder; and 3, fully rolling, molding and roasting the powder together with molecular sieve under the action of a peptizer or a binder to obtain the catalyst. The catalyst of the invention is obtained only through one-time high temperature roasting, so the preparation method is simple, and the preparation cost is obviously reduced. In addition, the hydrogenation center and the cracking center of the catalyst of the invention coordinate and cooperate with each other, so the catalyst has a high catalytic activity, and the catalyst which simultaneously has a large specific surface area and a large pore volume is suitable for processing catalytic process for the high productivity of naphtha by hydrocracking high-dry-point low-quality reduced pressure distillate oil.

The invention relates to a corundum-spinelle lithical concreting material containing nano magnesium carbonate and a preparation method. In the method, the corundum-spinelle lithical concreting material containing nano magnesium carbonate is prepared by taking the currently and commonly used corundum-spinelle lithical concreting material as the base, adding nano magnesium carbonate powder, and adopting high efficient dispersant and proper mixing technique. With the method adopted, not only the adverse impact of magnesium oxide hydration on the concreting material workability caused by adding magnesia to generate spinelle in situ is avoided, but also the dreg resistance and thermal shock resistance of the existing corundum-spinelle lithical concreting material are improved. The corundum-spinelle lithical concreting material containing nano magnesium carbonate prepared by the invention can be widely used in high temperature industries such as steel, nonferrous metal, ceramic, petrochemical and the like, and can also be used for refractory material products such as air bricks which are baked after concreting moulding.

The invention discloses an omnidirectional vectored thrust cycloidal propeller, which comprises a propeller, a cycloidal oar and a cycloidal oar eccentric circle positioning mechanism, wherein the cycloidal oar comprises cycloidal oar blades in the same number as propeller blades, control pull rods, an operating rock arm and a cycloidal oar blade spherical hinge; each cycloidal oar blade is hinged with a propeller blade at rear grazing point of the front edge of the propeller blade; the airfoil surface of each cycloidal oar blade is vertical to that of a propeller blade; an eccentric circular ring of the cycloidal oar eccentric circle positioning mechanism is sleeved on a propeller shaft; the connecting rod of the spherical head of each spherical hinge is connected with the eccentric circular ring respectively; each control pull rod is connected with a cycloidal oar blade; the operating rock arm is positioned in a spanwise symmetrical surface of the cycloidal oar blades; the cycloidal oar blade spherical hinge at one end of the operating rock arm is connected with one end of the control pull rods; and the other end of the operating rock arm is fixedly connected to a cycloidal oar blade tubular beam. The omnidirectional vectored thrust cycloidal propeller of the invention combines the advantages of the cycloidal oar and the conventional propeller and has an omnidirectional vectored thrust while improving aerodynamic efficiency of the conventional propeller.

The invention relates to a secondary steam compressed drying method of sludge. Present drying methods have the disadvantages of high energy consumption and low efficiency. The method of the invention comprises the following steps: uniformly mixing dewatered sludge generated in the process of sewage treatment with oil according to a weight ratio of 1-20:1 to form oil sludge, drying the oil sludge with secondary steam, carrying out oil and dry sludge separation on the dried oil sludge; reusing separated oil as a raw material of mixed oil sludge, and treating separated dry sludge as a dry finished product of sludge; and separating saturated secondary steam from the secondary steam generated in the process, compressing to superheated steam superheated steam, and sending the superheated steam which is treated as a heat source to a heating chamber of a drier. The method of the invention fully utilizes the heat energy of the secondary steam, so the energy consumption of a drying system is greatly reduced; and no dust is entrained in the drying process, so the cleaning of heat exchange surfaces of a drying device is kept, and the drying efficiency is high.

The invention provides a linear frequency-modulated signal generator with a predistortion function. The linear frequency-modulated signal generator comprises an FPGA unit, a digital-analog conversion unit and a filtering unit, wherein the FPGA unit is used for generating a phase position predistortion digital linear frequency-modulated signal and conducting amplitude predistortion processing on the phase position predistortion digital linear frequency-modulated signal to generate two orthogonal amplitude-phase predistortion digital linear frequency-modulated signals; the digital-analog conversion unit is connected with the output end of the FPGA unit and used for converting the two orthogonal digital linear frequency-modulated signals subjected to amplitude-phase predistortion into two orthogonal discrete analog linear frequency-modulated signals; the filtering unit is connected with the digital-analog conversion unit and used for filtering out frequency components beyond a preset frequency range of the two orthogonal discrete analog linear frequency-modulated signals to obtain two continuous orthogonal analog linear frequency-modulated signals. The linear frequency-modulated signal generator can compensate for non-linear influences of an analog circuit on the linear frequency-modulated signals by means of amplitude-phase predistortion processing, and guarantee that the high-quality linear frequency-modulated signals can be obtained finally.

The invention relates to the field of multimedia video, in particular to an AVS video decoder (information technology-advanced coding of audio and video) jointly decoded by software and hardware in video decoding. The video decoder comprises a DSP (digital signal processor) and a coprocessor which are adopted for joint decoding of software and hardware; DSP completes a software decoding part, completes analysis of an AVS protocol, generates various parameters required by decoding, and controls the decoding process of the coprocessor. Realization of VLSI (a very large scale integrated circuit) of a structure of the AVS video decoder jointly decoded by software and hardware can decode the AVS in a standard definition or a larger size image in real-time under a process of 0.18 micron; as DSP programming has large flexibility, the decoder structure is easy to be compatible with decoding of other standard video formats, meanwhile, the decoder has small chip area, power consumption and low cost.

An object of this invention is to provide a newspaper production system, having the structure of a system that is provided with a supply unit for a continuous web provided at an upstream side of a printing unit for printing on one surface and the other surface of a continuous web, and a processing unit for carrying out cutting and folding processing of a continuous web after printing at a downstream side, by making the area of an installation flat region for the printing unit for printing on one surface and the other surface of a continuous web, having an ink jet printing device group for printing one side of the continuous web and an ink jet printing device group for printing the other side of the paper sheet, small, and with which it is easy for a single person to carry out a newspaper production operation of monitoring the entire system. It is also an object of this invention to provide a newspaper production system and newspaper production method that enables production of a few sizes of a plurality of newspaper pages arranged horizontally as sheets constituting a newspaper by sequentially cutting, and being capable of producing a newspaper formed of various page configurations.

The invention discloses a preparation method of a hydrocracking catalyst. The preparation method comprises the following steps of carrying out low-temperature hydro-thermal treatment on alumina dry gel powder in the ammonia-containing water vapor atmosphere, dipping the alumina dry gel powder subjected to hydro-thermal treatment into a solution containing a hydrogenation active metal ingredient, carrying out drying, and carrying out full grinding, molding, drying and calcination of the alumina dry gel powder with the hydrogenation active metal ingredient, and a molecular sieve in the presence of a peptizer or a binder to obtain the hydrocracking catalyst. The preparation method improves a catalyst pore structure. The hydrocracking catalyst obtained by the preparation method has a large specific surface area and a large pore volume, is conducive to optimized cooperation of a hydrogenation ingredient and a cracking ingredient, has high catalytic activity, and is suitable for hydrocracking yield-increasing of high-quality heavy naphtha from vacuum distillate having a high dry point and poor quality and for a catalytic process for improvement of tail oil product quality.

The invention discloses a testing device of a 3D-SIC (Three-Dimensional-Semiconductor Integrated Circuit) through silicon vias provided with a signal rebounding module. A sending end is connected with a receiving end by through a plurality of silicon vias TSVs. The sending end comprises a first tested chip, a decoder, a control unit CU, a latch D and a bidirectional switch DSW. The receiving end comprises a second tested chip and a signal rebounding module. The signal rebounding module comprises a signal generator F, a plurality of delay cells and a plurality of three-state gates. The upper ends of the TSVs are connected with the delay cells M and the signal generator F at the receiving end. The lower ends of the TSVs are connected with the decoder and the DSW at the sending end. The decoder, the latch D and the DSW are connected with the CU. The latch D is further connected with the DSW. The testing device of the 3D-SIC through silicon vias provided with the signal rebounding module can effectively solve the problem that failed TSVs in the 3D chip preparing process are hard to detect effectively, and has the advantages of smaller area and practical expenses and lower power consumption and the like.

A switch bootstrap charging circuit suitable for high-speed gate driving of a GaN power device belongs to the technical field of power management. A control logic module generates a first control signal and a second control signal according to the undervoltage signal and the low-side gate driving signal. The gate electrode of the first PMOS transistor is connected to the second control signal, thesource electrode thereof is connected to the supply voltage, and the drain electrode thereof is connected to the source electrode of the first NMOS transistor. An input end of the first inverter is connected with a first control signal, an output end of the first inverter is connected with an input end of the second inverter and is connected with a cathode of the first diode and a gate electrodeof the second NMOS transistor through a first capacitor; The anode of the first diode and the source of the second NMOS transistor are connected to a supply voltage; The gate electrode of the first NMOS transistor is connected to the drain electrode of the second NMOS transistor and is connected to the output end of the second inverter through the second capacitor, and the drain electrode of the second NMOS transistor serves as the output end of the switch bootstrap charging circuit. The invention can prevent the voltage on the bootstrap capacitor from being too large when charging, can realize on-chip integration, and has a simple circuit structure and high reliability. It is especially suitable for GaN high-speed gate drive.

The invention discloses a preparation method for an anatase titanium dioxide nanocrystalline mesoporous microsphere. A butyl titanate alcoholic solution is prepared from butyl titanate and alcohol; a gelatin solution is prepared by gelatin and acetic acid; the gelatin solution is slowly dropped into the butyl titanate alcoholic solution to obtain a sol solution; then the sol solution is aged and dried to obtain dry gel; the dry gel is put into distilled water for boiling; after filtration cleaning is executed, the product is cleaned through the alcohol and then is dried to obtain the anatase TiO2 nanocrystalline mesoporous microsphere. The preparation technology disclosed by the invention is simple and favorable for large-scale popularization and application, and a used solvent is safe and environment-friendly.