68 results about "Double Value" patented technology

A borehole logging system for determining bulk density, porosity and formation gas/liquid fluid saturation of formation penetrated by a borehole. Measures of fast neutron radiation and inelastic scatter gamma radiation, induced by a pulsed neutron source, are combined with an iterative numerical solution of a two-group diffusion model to obtain the formation parameters of interest. Double-valued ambiguities in prior art measurements are removed by using the iterative solution of the inverted two-group diffusion model. The system requires two gamma ray detectors at different axial spacings from the source, and a single neutron detector axially spaced between the two gamma ray detectors. The system can be embodied as a wireline system or as a logging-while-drilling system.

The invention relates to a method for detecting vibration of a blade of a rotary machine, in particular to a method for detecting synchronous vibration parameters of a high-speed rotary blade under a constant speed. In order to eliminate limitation of taking uniform variable speed running as a precondition and meet the demand of real-time online monitoring, the invention adopts the technical scheme that based on a bladetip timing vibration detection principle, the synchronous vibration displacement yi of a certain blade, detected by a bladetip timing sensor, is indicated as following: yi=Asin(Nealphai+Phi0)+C(i=0,1,2...). A frequency doubling traversal range containing actual synchronous vibration frequency doubling Ne of the blade is selected, and then an actual installing included angle alphai of the bladetip timing sensor and the selected frequency doubling Nej are substituted into the formula so as to work out the vibration displacement of different frequency doubling corresponding to a multiple-sensor theory measured by a least square method; the square and the radix of an error between the calculated vibration displacement and the vibration displacement of actual measurement are worked out, and the frequency doubling of the minimum value of the square and the radix of the error is taken as the frequency doubling value of the actual vibration of the blade in a frequency doubling traversal process. The invention is mainly applied to the method for detecting the vibration of the blade of the rotary machine.

The present invention relates to a power divider and a power combiner employing dual band-Composite Right/Left-Handed (CRLH) transmission lines. A power divider including an input terminal and two output terminals according to the present invention includes two transmission lines each having two terminals connected to the input terminal and the output terminals, respectively, and two short-stubs having one terminals connected to the output terminals, respectively, and the other terminals connected to grounds. The transmission line may employ a first dual band-CRLH transmission line having a double value of a termination impedance, which is substantially connected to the output terminal, as a characteristic impedance, and the short-stub may employ a second dual band-CRLH transmission line, which has substantially the same value as that of the termination impedance as a characteristic impedance. The first dual band-CRLH transmission line and the second dual band-CRLH transmission line generate phase delay of 90 degrees in a high frequency band and phase delay of −90 degrees in a low frequency band with respect to an input signal.

The invention provides a natural river course cross section stage-discharge relation determining method. The method comprises the steps of firstly, obtaining actually-measured cross section data (xi, zi) of a target cross section, forming M subsections between the cross section x1 and xN equally (xni, xni+1), and obtaining the elevation value corresponding to a node of each subsection; secondly, determining the Manning roughness coefficients n of the different cross sections; thirdly, forming Nz layers equally between the lowest elevation and the highest elevation of the cross sections, calculating the discharge value Qij of each subsection of each elevation equal division layer, and calculating the sum of the discharge values Qij of all the subsections to obtain the total cross section discharge value Qj corresponding to the layer; obtaining a stage-discharge relation according to the total cross section flow value Qj of each layer and the stage corresponding to the layer. The method is based on subsection calculation of stage-discharge relations, performs segmentation calculation of corresponding discharges on the river course cross sections according to the roughness and thus obtains the stage-discharge relation corresponding to a whole cross section; the method can avoid the double value problem in conventional stage-discharge relation determination.

The invention relates to a complementary heating device, in particular to the technical field of multi-energy combined heat supply and aims at fully using advantages of solar energy and a ground source heat pump, overcoming defects of heat supply of a conventional energy heat supply network, and achieving energy conservation and emission reduction of the central heat supply in northeast severe cold regions. Complementary heat supply combining three types of energy of solar energy-the ground source heat pump and heat supply network is provided for the first time. The device is applicable to modification projects of the existing buildings. On the basis of the existing heat supply network or the ground source heat pump, energy-saving modification is achieved. The device has the advantages of fully using the advantages of the solar energy and the ground source heat pump, combining the conventional energy heat supply and renewable energy source heat supply, and achieving double values of environment protection and economy. The heat supply network is added into a solar energy-ground source heat pump system, the capacity and size of the solar energy and the ground source heat pump system are reduced, initial investment of the system is reduced, and simultaneously the stability and the reliability of the complementary heat supply system are improved.

A method for backspacing index of radio local area network includes initializing node after node is started up, detecting whether channel is idle or not when there is data packet required to be sent by node, selecting initial counting value and carrying out backspace counting, sending out data packet when counting value on counter is zero, doubling current competition widow value of node and comparing doubled value with maximum competition window value to take minimum value as competition window value for being used to carry out resending, and entering node into idle waiting state when there is no data packet required to be sent by node.

The invention reduces a centrifugal force of a orbiting scroll which acts on an auxiliary crank mechanism. A crank pin which is eccentric from a main shaft portion is formed in a drive shaft, and a main balance weight is provided in a base end side of the crank pin. The main shaft portion of the drive shaft is rotatably supported by using a main bearing, and the crank pin is attached to a orbiting bearing which is provided in a back face side of a orbiting scroll. Further, an internal gap of the main bearing is set to a value which is larger than a value obtained by subtracting the double value of an eccentric amount difference between an eccentric amount of an auxiliary crank shaft and an eccentric amount of the drive shaft from an internal gap of the orbiting bearing. Accordingly, the internal gap of the main bearing does not come to 0 even if a compressor comes to a steady state.

The invention relates to a processing method for hawthorn flavor sunflower seeds. The processing method comprises the following steps: taking hawthorn and liquorice, heating to a boiled state after adding clear water, keeping the boiled state for a certain time and filtering to obtain material water; then adding salt, sodium cyclamate and saccharin sodium salt into the material water, stirring till the materials are completely dissolved, then adding sunflower seeds, heating to a boiled state, keeping the boiled state for a certain time and then sealing; taking out the sunflower seeds, placing the sunflower seeds into a drying oven to carry out drying after naturally cooling to the room temperature, then placing the sunflower seeds into a roller fry pan to further carry out drying and fragrance improvement, taking out the sunflower seeds after frying to the state that sunflower seeds are yellow, and finally, naturally cooling to the room temperature. According to the invention, hawthorn and liquorice which have medicinal and edible double values are added into the accessories, so that the prepared sunflower seeds have sweet and sour taste, and are moderate in sweetness and saltness and good in flavor; meanwhile, hawthorn has effects of promoting salivation, moistening, tonifying spleen and appetizing, and can promote salivary secretion when being eaten, so that the common problems of parched mouth and scorched tongue, which are generated when a customer eats the sunflower seeds, are solved; moreover, liquorice has effects of clearing heat and removing toxicity and has a great relieving effect on the problem of high probability of getting inflamed in the process of eating the sunflower seeds when being combined with the effects of promoting salivation and moistening of hawthorn.

A frequency-sweep experimental method for predicting noise of a power capacitor, comprises steps of: (1) loading the capacitor with a sine voltage excitation with a loading frequency value of ½ to 50 times of a power frequency in sequence, at an increase of half of the power frequency for each time, and measuring vibration velocity at various points on a case of the capacitor; (2) under each loading frequency, dividing vibration velocity by a square of each voltage applied to obtain an electromechanical vibration frequency response function value corresponding to a double frequency which has a double value of each loading frequency mentioned above; (3) calculating frequency spectrum of a square of the voltage of the capacitor according to the voltage and a current of the capacitor; (4) multiplying the frequency spectrum of the square of the voltage of the capacitor by the electromechanical vibration frequency response function value of the capacitor to obtain a vibration velocity spectrum of the case of the capacitor; (5) calculating acoustical power of the noise radiated by the capacitor according to the vibration velocity spectrum of the case of the capacitor. The method of the present invention is capable of achieving the problems of lacking a simple and standard method for detecting noise in the capacitor industry, and lacking sufficient investment in noise reduction, so as to provide a fundamental for solving the problems in the capacitor noise.

The invention provides a control method, device and system for an ultrasonic transducer. The control method for the ultrasonic transducer includes the following steps: when a triggering condition is satisfied, obtaining a first current wavelength of ultrasonic waves transmitted by a transmitting transducer of the ultrasonic transducer; obtaining a first current distance between a reflecting face and the ultrasonic transducer; obtaining a minimum value of an absolute value of a difference value between a doubled value of the first current distance and an integral-multiple value of the first current wavelength; judging whether the minimum value is larger than or equal to a threshold value; if so, determining an ideal transmitting frequency of the transmitting transducer according to the first current wavelength; according to the ideal transmitting frequency, adjusting the transmitting transducer so as to make the doubled value of the first current distance is an integral multiple of a second wavelength; and the second wavelength being the wavelength of ultrasonic waves transmitted by the adjusted transmitting transducer. The control method, device and system of the ultrasonic transducer are capable of improving the measurement accuracy.

The invention relates to a method and an apparatus for measuring the thickness of a transparent film by broad band interferometry, comprising the steps of preparing a correlogram of the film by an interferometer, applying a Fourier transformation to said correlogram to obtain a Fourier phase function, removing a linear component thereof, applying a second integral transformation to the remaining non-linear component to obtain an integral amplitude function of said non-linear component, identifying the peak location of said integral amplitude function and determining the thickness of the film as the double value of the abscissa at said peak location considering a refractive index of a film which is dependent on wavelength. The last two steps may be replaced by identifying the peak locations of said integral amplitude function and determining the thickness of the films as the double values of the abscissas at the peak locations.

Disclosed is a control device for an internal combustion engine that can estimate heat production. An arithmetic processing unit (20) can calculate PVK according to a crank angle (theta), and can also calculate the rate of change of PVK (dPVK/d theta). ''The crank angle with the maximum dPVK/d theta value during PVK increase'' means ''50% combustion ratio crank angle'' and for the sake of convenience is also written as ''theta CA50.'' In addition, PVK calculated from theta CA50 is also written as ''PVK CA50.'' Also, for the sake of convenience, the difference between PVK at the time that combustion starts (zero, as in figures 3 and 4 of the present embodiment) and PVK CA50 is written as delta PVK CA50. The doubled value of delta PVK CA50 equals total heat production (Q).

A floating wind turbine unit is formed by a large-scale vertical-shaft wind turbine unit and a floating base which are closely fitted integrally. The upper box wall and lower box wall of the floating base are fixed with a tower of the large-scale vertical-shaft wind turbine unit. Rotating force output of the large-scale vertical-shaft wind turbine unit is transmitted through a driven gear unit and upper and lower driven shafts in a matching driven manner to a power generator or multiple generator adjusting system arranged in the floating base, so that stable wind power generation which is achieved by double valued adjustment and which is capable of matching with wind wheel force output capacity adjustment. An offshore floating wind power plant is formed by an integrated entire structure composed of more than two floating wind turbines in combination in multiple various forms. According to the floating wind turbine and the offshore floating wind power plant, key technical gaps of wind power developing complete machines of near offshore and far offshore can be filled, and gaps of large equipment of offshore wind power developing field can be filled.

The invention discloses a method for synthesizing 3-alkenyl-1, 6-diacid by using electrochemical reaction, which comprises the following steps of: adding organic ammonium salt and organic solvent into a diaphragm-free high pressure electrolytic cell, adding a 1, 3-diolefin compound into the electrolytic cell, then introducing carbon dioxide into the electrolytic cell, filtering the liquid in the high pressure electrolytic cell after the electrochemical reaction, drying filter residues, then acidifying the filter residues, extracting the acidified filter residues by ether, evaporating the extracted solution to obtain a coarse product of the 3-alkenyl-1, 6-diacid, and re-crystallizing the coarse product to obtain a pure product. The method is performed under mild electrochemical conditions, so the method is environment-friendly; the raw materials are cheap and easy to be obtained, need no additional catalyst, have high selectivity and are applicable to industrialization; and the method can efficiently convert and utilize the carbon dioxide, and has double values of economy and environmental protection.

The invention relates to a grapefruit and egg white icing powder which is composed of the following components by weight: 50%-55% of white granulated sugar, 32%-36% of maltodextrin, 5%-7% of grapefruit powder, 3%-5% of egg white powder, 2%-5% of pregelatinized starch and 0.02%-0.04% of monascus yellow color which are dosed and mixed. A method for preparing grapefruit and egg white icing by the grapefruit and egg white icing powder is simple, convenient and quick. A certain amount of water is added into the grapefruit and egg white icing powder, and the mixture is directly stirred to prepare the grapefruit and egg white icing which is hard in quality, stable in foam, durable and proper in toughness and flexibility. Various flowers and three-dimensional patterns can be made by flower extruding and modeling. The grapefruit and egg white icing powder is attractive in appearance, sweet and sour, has fresh grapefruit taste, is a cake decoration with good color, fragrance, taste and nutrient and has double value of observation and edibleness.

The invention provides a printing precision processing method and device. The method comprises steps as follows: obtaining a first count reference value P through a formula N=K*D/M according to a set frequency division value D, a frequency doubling value M and an obtained first interval count value K at a current moment, wherein the first count reference value P is an integer part of N, the first interval count value is larger than or equal to a preset threshold value, the preset threshold value is set according to a precision requirement, and a pulse signal is output according to the first count reference value P.

The invention relates to a single-phase electric hoist in lifting equipment, in particular to a single-phase electric hoist with a lower limit device. The invention adopts a technical proposal that the single-phase electric hoist with the lower limit device comprises a shell, as well as a reel, a speed reducer, a motor driving the reel to rotate, a control component, a steel wire rope wound on the reel, an upper limit device and a lower limit device which are arranged inside the shell; the lower limit device is arranged on the single-phase electric hoist; the lower limit device comprises a microswitch component and a guide rod which is matched with the microswitch component to control the rotation of the motor; one end of the guide rod is arranged on the corresponding side of the reel, and the other end of the guide rod is in collision fit with the microswitch component; a suitable position of the reel is provided with a through hole; the steel wire rope passes through the through hole and then is wound on the reel for one to five circles, and the end parts of the steel wire rope are fixed; the motor is a single-phase double-value capacitance-operating bypassed magnetic braking type asynchronous motor; when the single-phase electric hoist lifts a heavy object, higher-value capacitance is used for starting operation; and when the single-phase electric hoist drops the heave object, lower-value capacitance is used for starting the operation. With the technical proposal, the invention provides the single-phase electric hoist which is simple in structure, safe to use and higher in working character, shuts down when the single-phase electric hoist drops to the lowest point, and is provided with the lower limit device.