279results about How to "The implementation method is simple" patented technology

The invention provides a terahertz radiation detector. The terahertz radiation detector comprises a terahertz sensitive structure and a substrate chip including a reading circuit, wherein the terahertz sensitive structure comprises a terahertz absorption structure, a heat conversion layer and a protection layer, when passive/active terahertz waves are focused on the terahertz sensitive structure through a terahertz object lens, absorbed energy is converted into heat energy through the terahertz absorption structure, the heat energy is converted into an electric signal through the heat conversion layer, and the electric signal is read through the reading circuit on the substrate chip. According to the terahertz radiation detector, a terahertz micro-bolometer micro-bolometer operates under a non-refrigeration environment, single point detection can be carried out, terahertz imaging can further be realized through a focal plane array.

A gel-spinning ultrahigh-molecular-weight composite polyethene (UHMWPE)/carbon nanotube fibre is composed of UHMWPE and carbon nanotubes (0.01-5 wt.%) as modifier. It is prepared through purifying and organizing carbon nanotubes, preparing gel, and spinning. Its advantages are simple preparing process and high refractory and anticreep performance.

The invention discloses an aqueous medium energy transition blasting method and charging cavity. The aqueous medium energy transition blasting method comprises the steps that firstly, an aqueous medium and explosives with the mass ratio larger than or equal to an optimal value are mounted in the explosive charging cavity of a blasting medium, and the explosives and the aqueous medium are isolated from each other; and then the explosives mounted in the explosive charging cavity are detonated. The aqueous medium and the explosives with the mass ratio larger than or equal to the optimal value M are mounted in the charging cavity, the explosives and the aqueous medium are isolated from each other, and the optimal value M is the ratio of explosion heat of the explosives adopted in the blasting process to heat energy released when water is synthesized by hydrogen and oxygen. The aqueous medium energy transition blasting method and charging cavity have the beneficial effects that the effective utilization rate of energy of the explosives can be increased, the blasting effect of the explosives on the blasting medium can be improved, blasting damage can be reduced, and blasting smoke is less.

The invention relates to emulsified asphalt with strong compatibility, and a preparation method thereof. The preparation method comprises: heating base asphalt to a temperature of 100-160 DEG C to remove moisture, then sequential adding unsaturated anhydride and a catalyst, a hydrophilic chain extender, isocyanate prepolymer, wherein the isocyanate prepolymer is added in 2-3 hours through controlling feeding speed, followed by reacting for 2 hours to obtain a modified asphalt; preparing soap liquid by a emulsifier, hydrochloric acid and water, and heating the soap liquid to a temperature of 60-70 DEG C; heating the modified asphalt to a temperature of 130-150 DEG C, and emulsifying the soap liquid and the modified asphalt to obtain the modified emulsified asphalt. The modified emulsified asphalt comprises, by weight, 60-65% of the modified asphalt, 2-4.0% of an emulsifier, 0-1.0% of a stabilizer, 29.0-36.8% of water. The modified asphalt provided by the present invention has special structure. According to the present invention, emulsified asphalt after emulsifying is compatible with stone of different activities, such that a purpose of the strong compatibility is achieved.

The invention provides a multi-frequency base station antenna for eliminating coupling resonance. The multi-frequency base station antenna comprises a reflecting plate, a first low-frequency radiationarray, a second low-frequency radiation array and a first high-frequency radiation array, wherein the first low-frequency radiation array and the second low-frequency radiation array are arranged onthe reflecting plate, are parallel to each other and are arranged on the same radiation surface, the first high-frequency radiation array is arranged between the first low-frequency radiation array and the second low-frequency radiation array, the first low-frequency radiation array and the second low-frequency radiation array respectively comprises a plurality of low-frequency radiation units, the first high-frequency radiation array comprises a plurality of first high-frequency radiation arrays, the multi-frequency base station antenna also comprises isolation strips, and the isolation strips are parallel to the reflecting plate, are insulated with the reflecting plate, extend along central axes of the first low-frequency radiation array and the second low-frequency radiation array and are arranged between radiation surfaces of the first high-frequency radiation units and radiation surfaces of the first low-frequency radiation units and the second low-frequency radiation units. By the multi-frequency base station antenna, coupling among the arrays is reduced, and the technical effects of improving the isolation among the arrays and reducing resonances among the arrays are achieved.

The invention relates to a small-current grounding fault positioning method employing a transient zero sequence current, and the method is especially used for a system of an instation no-selection-line device. The method comprises the steps: selecting at least three lines with the bigger transient zero sequence current through employing the transient zero sequence current amplitudes of all detection points at an outlet of a bus; determining that a jump point is a fault point through employing the characteristics that the monotone decreasing of amplitudes of the transient zero sequence currents of healthy lines and the monotone increasing of the amplitudes of the transient zero sequence currents of fault lines at first and then the monotone decreasing of the amplitudes of the transient zero sequence currents of fault lines, and determining that fault segment is a segment where the jump point is located. The method irons out the defects of the instation no-selection-line device, just employs the transient current signals, is wide in application range, is simple, and is easy to implement.

The invention discloses an online detection method for a hot rolling plate-blank camber and running deviation. The method is that: on the condition of the normal production of a continuous casting machine and a heating furnace, the centerline of the whole heating furnace, namely, the centerline is found out according to the width size of the surrounding of the heating furnace and the width size of the produced plate-blank, and then the horizontal distance from the plate-blank to a fixed point can be respectively measured and compared at the inlet and the outlet of the heating furnace, and continuous measurement is conducted for many times along the length direction of the plate-blank, at last, the graph of the plate-blank camber can be achieved and the intuitive description about the plate-blank camber and the shape of the camber can be realized; therefore, the origin of the problem can be analyzed and the good condition for later workstage rolling can be created.

The invention discloses a field rock mass poisson ratio test method. The method comprises the steps of firstly digging a test flat hole in a mountain, drilling a cylindrical test piece on bedrock on the bottom surface of the test flat hole by utilizing a hollow drill bit, and symmetrically perforating test holes in the bottom of an annular groove at the periphery of the test piece; sleeving the test piece with an elastic steel lantern ring provided with a steel contact and a strain plate, connecting a strain plate test line and a resistance strain gauge, and calculating transverse deformation of the test piece by virtue of test; fixing the top surface of the test piece together with a test flat hole top plate sequentially through a pressure plate, a jack, a reducing connector steel plate, a combined force transfer rod and a hinge anchor, installing measuring points in bolt holes in two sides of the pressure plate and in the test holes in the bottom of the annular groove, and installing a dial indicator above the measuring point; calculating vertical deformation of the test piece after the load test; then calculating a corresponding transverse strain value and a vertical strain value, and calculating the poisson ratio of the test piece according to the transverse strain value and the vertical strain value. The field rock mass poisson ratio test method has advantages that the implementation method is simple and rapid, the measurement data is accurate and reliable, and the real condition of the rock mass can be comprehensively reflected.

The invention belongs to a concentrated flood discharge and energy dissipation structure behind a hydroelectric dam, and more particularly relates to a high-geostress narrow-valley inverted arch plunge pool and a design method thereof. The plunge pool is structurally characterized by comprising a bottom plate (1), arch supports (2) and anchor bar piles (3), wherein the bottom plate (1) is an arched concrete structure on the whole, and two ends of the arched concrete bottom plate (1) is connected with the arch supports (2) into a whole; the anchor bar piles (3) are arranged at the lower end of the arched concrete bottom plate (1) at intervals, and each anchor bar pile (3) keeps perpendicular to the lower end of the bottom plate (1); and the arch supports (2) at the two ends are positioned at the lower ends of protection slopes (9) at the two ends. The design method is completed by five steps, makes full use of the natural 'pan bottom'-shaped river beds, avoids touching geostress concentration areas at the bottom of the valley due to trapezoid excavation, and adopts the inverted arch structure to finally transfer most of load to rock mass through the arch supports instead of bearing all the load by the river beds, thus improving the stress concentration phenomenon at the bottom of the valley.

The invention discloses a suppression method for zero-sequence voltage caused by a dual inverter switching dead area, belongs to the technical field of inverter control and aims to solve the problems that a system has zero-sequence voltage and system performances are affected due to addition of dead time when common direct-current bus dual inverter switching signals are switched. Based on SVPWM (space vector pulse width modulation) performed by a switch combination without zero-sequence voltage, the suppression method includes the steps: firstly, acquiring three-phase voltage signals after RC (resistance-capacitance) low-pass filter of dual inverters by a voltage sensor; processing the three-phase voltage signals to obtain system zero-sequence voltage; performing dead area compensation calculation according to the system zero-sequence voltage to obtain a compensation voltage vector, offsetting the system zero-sequence voltage by the zero-sequence voltage generated by the compensation voltage vector, and suppressing the system zero-sequence voltage. The suppression method is used for suppressing the zero-sequence voltage caused by the dual inverter switching dead area.

A thermal imaging camera (1) which, in order to extract IR-images (2) from a stream of crude data (12) of crude IR-images (3), performs a compensation (21) of pixel measurements (6) of the crude IR-images (3) with pixel-background values (8) pixel by pixel, with a new calculation (19) of the pixel-background value (8) being performed when the variation of the pixel measurements (6) in the measurement sequence of the crude data stream (12) for the pixels exceeds a lower limit for variations.

The invention relates to an easily-degradable alkali-free viscosity reducer for thick oil and a preparation method thereof. The viscosity reducer consists of propylene glycol block polyether, fatty alcohol ammonium sulfate, fatty alcohol, a penetrating agent and water; and in terms of the total mass of the viscosity reducer, the sum of mass percent of propylene glycol block polyether, fatty alcohol ammonium sulfate, fatty alcohol and the penetrating agent is 45 to 60 wt%. The invention also provides the preparation method for the viscosity reducer, and the method comprises the following steps: successively adding propylene glycol block polyether, fatty alcohol ammonium sulfate, fatty alcohol and the penetrating agent into water at a temperature of 50 to 80 DEG C under normal pressure, wherein a mass ratio of the four above-mentioned raw materials to water is 15: 15: 5: 10: 55 to 25: 25: 4: 6: 40; and carrying out continuous stirring for 60 to 90 min at a rotating speed of 60 to 120 r/min while adding the four raw materials so as to obtain the easily-degradable alkali-free viscosity reducer for thick oil. Surfactant used in the viscosity reducer is nonionic and anionic surfactant, the structure of benzene rings is not included in a molecule, and therefore, the characteristics of easy degradability, no toxicity, greenness and environment friendliness are obtained.

The present invention discloses a kind of freezing spun composite polyethylene/epoxy resin fiber and its preparation process. The freezing spun composite polyethylene/epoxy resin fiber is prepared with powdered ultrahigh molecular weight polyethylene in average molecular weight greater than 1 MDa in 100 weight portions, epoxy resin in 1-10 weight portions, curing agent in 0.01-1 weight portions, antioxidant in 0.1-5 weight portions and antioxidant assistant in 0.01-2 weight portions. The present invention is superior in that the epoxy resin as modifier has excellent performance and few damage on ultrahigh molecular weight polyethylene and the freezing spun composite polyethylene/epoxy resin fiber may be produced in available ultrahigh molecular weight polyethylene fiber producing apparatus after slightly improvement.

The invention discloses an electrically-driven hedge clipping device, and belongs to the technical field of hedge clipping. The electrically-driven hedge clipping device comprises a lifting system, atranslation system, an overall rotating system, a tool rotating system, a clipping system and a control system; the overall rotating system comprises a rotating base, supporting beams, a telescopic cross beam, motors and speed reducers, the supporting beams are installed on the rotating base, a cross beam sliding cover is hinged to the upper ends of the supporting beams through hinging shafts, themotors and the speed reducers are installed at the outer sides of the supporting beams, the motors are connected with the speed reducers, and the speed reducers are connected with the hinging shafts;the tool rotating system comprises a lifting rod, and the lifting rod is rotatably installed at the tail end of the telescopic cross beam; the lifting system is installed on the side wall of the lifting rod, the translation system and the lifting system are connected through a sliding ring connection part, and the clipping system is installed on the lifting system. The electrically-driven hedge clipping device is adopted for an electrically-driven hedge clipping method. The electrically-driven hedge clipping device has the advantages of being simple in structure, capable of clipping a hedge from multiple angles, flexible in clipping and the like.

The invention discloses a transient zero sequence current-based single phase earth fault discrimination method comprising the following steps: in step A, power distribution network zero sequence voltage magnitude is detected via all power distribution terminals, whether a single phase earth fault occurs is determined, step B is executed if the fault occurs, otherwise step A is executed in a circulating manner; in step B, when the earth fault occurs, zero sequence voltage is subjected to derivation operation via the power distribution terminals, polarities of a transient zero sequence current and a zero sequence voltage derivative are compared, and a line having the single phase earth fault is determined; in step C, a line with opposite polarities is chosen as the line having the fault, andthe power distribution terminals send earth fault blocking signals carrying grade information to power distribution terminals for a line which is one level higher; in step D, according to variation of transient zero sequence current amplitudes of all detection points on the line chosen in step C, a small current earth fault is positioned.

The invention provides a shaft furnace with a central air distribution device, which is characterized in that: a guide cone in the existing shaft furnace is heightened, hollowed-out and drilled, and a pipeline and an adjustable valve for conveying reducing coal gas into the interior of the furnace are additionally arranged outside the furnace, so that the implement method is simple, and the field renovation is easy. The air distribution device has the characteristics of small size, smoothness in blanking, uniformity in distribution of central coal gas and long service life. According to the invention, the coal gas amount of the center of the shaft furnace can be adjusted, and the metallization rate of the materials on the central part of the shaft furnace is ensured.

The invention discloses a method for improving the waxberry fruit soluble solid content. In the waxberry fruit development process, a sodium selenite or boric acid agent is sprayed to a waxberry tree. Sodium selenite is prepared into an aqueous solution with the 20-200mg.L-1 mass concentration in use, and boric acid is prepared into an aqueous solution with the 0-2g.L-1 mass concentration in use; the using mode is that in the period from 20 days after waxberry flowers wither to 30 days before waxberry fruits mature and are picked up, the concentration of the agent is adjusted, spraying processing is carried out on the waxberry tree 2-4 times with a sprayer, spraying is carried out every 7-21 days, and spraying is carried out until the leave faces of the waxberry tree is wet each time; production management is carried out according to daily management of a normal waxberry garden. The method is easy to implement and low in cost, the effect of improving the waxberry fruit soluble solid content is obvious, and the method has the obvious economic benefits and is suitable for being popularized and applied.

The invention provides a TBM unfavorable geology identification method based on an intelligent driving model to solve the problems of low identification degree and the like caused by the fact that a TBM driver judges geology according to experience of the TBM driver, and the method comprises the following steps: collecting TBM operation parameters reflecting an equipment operation state; preprocessing the obtained TBM operation parameters; according to the preprocessed TBM operation parameters, constructing TBM comprehensive parameters capable of comprehensively reflecting the interaction of the rock machine; extracting stable section mean value characteristics from the obtained TBM operation parameters and TBM comprehensive parameters, and a constructing TBM characteristic parameter matrix; according to the identified TBM normal stratum and the unfavorable geological section in the tunneling process, using an intelligent driving model to construct an unfavorable geological identification model between the TBM characteristic parameter matrix under the corresponding scalar section and whether there is unfavorable geology or not; and obtaining a new TBM characteristic parameter matrix for the newly obtained TBM operation parameters according to the method, and judging whether the current TBM enters bad geology or not on line through the established unfavorable geology identification model. The implementation method disclosed by the invention is simple and high in distinguishing degree.