60 results about "Greek letter lambda" patented technology

A spaceflight optical remote sensing imaging simulation method based on a space-time unified feature comprises the steps that (1), the relation of the position of a satellite at any GMT and the time and the longitude and latitude of the satellite at a GMT sub-satellite point are obtained in a calculating mode according to satellite orbit parameters; (2), the entrance pupil radiance L (lamda) of a remote sensor is obtained in a calculating mode according to the longitude and latitude of the satellite at the GMT sub-satellite point, an imaging time ground target reflectivity feature pho and a solar elevation angle theta; (3), the signal Starget of the remote sensor is obtained by combining the remote senor parameters and L (lamda), linear amplification, smoothing and quantization processing are carried out on the Starget in sequence, and an initial simulation image is obtained after a remote sensor optical system, a remote sensor detector, a remote sensor circuit and a simulation MTF of a satellite platform are overlaid; (4), after compression, uncompression, radiation correction and MTF compensation are carried out on the initial simulation image, a simulation image needed by a user is obtained. The method can carry out effective optical remote sensing full-chain imaging simulation, and optical remote sensing in-orbit imaging quality is greatly improved.

The embodiment of the invention relates to the technical field of mobile communication, in particular to a Doherty power amplification circuit. The Doherty power amplification circuit is used for solving the problem that the bandwidth of a traditional power amplification circuit structure is limited because a quarter-wave impedance transformation line exists. According to the method, a main power amplifier branch comprises a main power amplifier, an input matching circuit of the main power amplifier, an output matching circuit of the main power amplifier and a first compensating circuit located between the output matching circuit of the main power amplifier and a power combiner, wherein the minimum phase allowed by the main power amplifier branch is used for the output matching circuit of the main power amplifier. As the minimum phase allowed by the main power amplifier branch is used for the output matching circuit of the main power amplifier, the main branch does not need to use the lamda/4 impedance transformation line, and then the system bandwidth is increased.

The invention relates to a preparation method of a mouse capable of producing a human antibody. The preparation method of the mouse capable of producing the human antibody comprises the step of carrying out hybridization on a transgenic mouse carrying a fragment containing a human antibody heavy chain gene locus part and a mouse carrying a fragment which is inserted into mouse genomic DNA (deoxyribonucleic acid) and contains an non-rearranged human antibody light chain gene locus part, wherein gene rearrangement and gene conversion can be carried out in the transgenic mouse by virtue of the human antibody heavy chain gene locus and the human antibody light chain gene locus, so as to produce various human immune globulins, and a mouse endogenous antibody heavy chain gene locus, a mouse endogenous antibody kappa light chain gene locus and a Lamda light chain gene locus are inactivated.

The invention relates to a model-free adaptive control method of a linear motor servo system, and belongs to the technical field of automatic control and mechanical-electrical integration. The model-free adaptive control method comprises the steps of 1) connecting and setting a parameter of a linear motor driver and testing running characteristic of a linear motor; 2) programming to achieve MFAC control, wherein the step 2) particularly comprises the steps of 2.1) calculating an output u(k) of the controller according to u(k)=u(k-1)+{[Rho Theta-bar (k)]/[Lamda+Theta-bar (k)<2>]}[y<*>(k+1)-y(k)]; and 2.2) calculating an output Theta-bar (k) of an estimator according to Theta-bar (k)= Theta-bar (k-1)+{[Eta Delta u(k-1)]/[Mu+Delta u(k-1)<2>]}[Delta y (k)-Theta-bar (k-1) Delta u(k-1)]; 3) downloading the output u(k) of the controller to a digital signal processor, and converting the output to an analogue signal; 4) generating a voltage output signal to drive the linear motor to run; 5) changing a parameter of a model-free adaptive control algorithm on line, and changing amplitude of an expected sine position signal; 6) performing on-line estimation on a pseudo-partial-derivative Theta-bar (k); 7) adjusting the output u(k) of the model-free adaptive controller on line according to the pseudo-partial-derivative Theta-bar (k); and 8) displaying a control result in real time, and observing a running effect of the linear servo system. The method has the advantages of high steady-state tracing accuracy, rapid dynamic response, good robustness and high interference-resistant capability.

Excellent electrical characteristics are obtained even when an antenna is further assembled to an antenna device provided with an antenna case having only a limited space. An antenna element (31) is formed on an antenna substrate (30) which is arranged upright on an antenna base (20). A planar antenna unit (35) is firmly attached to the antenna base (20) so that a planar antenna unit is positioned directly below the antenna element (31). When the wavelength of the center frequency in the operation frequency band of the planar antenna unit (35) is expressed by lamda, an interval between an upper surface of the planar antenna unit (35) and a lower end of the antenna element (31) is approximately 0.25 lamda or more. Thus, radiation directivity of the planar antenna unit (35) within a horizontal surface is permitted to be nondirectional without being affected by the antenna element (31), and excellent gain characteristics can be obtained.

The invention discloses a making method of alkaline-earth metal silicate phosphor powder activated with bivalence europium and belongs to technical domain of rare-earth luminescent material, wherein the composition of the phosphor powder is SrxBayEuzSiO2+x+y+z (2<=x<5, 0<y<=0. 01, 0<z<=0. 15, 2. 5<=x+y+<=5 ), which is characterized by the following: the range of wavelength agitated with the phosphor powder is from ultraviolet light to blue light to blue-green light (lamda exc equals 300-500nm); the emitting peak wavelength is lamda em equals 565nm-586nm and the half depth-width of emission peak (FWHM) is within 70-90nm. The phosphor powder can be used for yellow or yellow-orange component of white light LED as displaying material emitted by ultraviolet purple light as well.

The invention relates to wind profile radar. The invention discloses a wind profile radar wind speed determination method. The wind profile radar wind speed determination method of the invention comprises the steps of: a. receiving an echo signal and processing the echo signal to obtain an intermediate frequency signal; b. performing data sampling for the intermediate frequency signal; c. performing Hamming window weighted approach for the sampling signal; d. performing quick Fourier transform for the weighted signal; e. performing batten function interpolation for the signal after Fourier transform and finding the frequency spectrum amplitude maximum value f2; and f. calculating the average wind velocity Vr according to the following equation shown in the description, wherein f1 is the slip frequency between the emitted signal and the local oscillator frequency; Lamda is the wave length of the emitted signal; and f2-f1=Delta f is doppler frequency shift. The wind profile radar wind speed determination method of the invention enables the frequency spectrum information to be more precise by means of the frequency spectrum interpolation based on a spline function, and the center frequency estimation for the frequency spectrum after application of spline interpolation is more accurate than a traditional center frequency measuring method, thus greatly improving the accuracy for determining the wind profile radar wind speed.

The invention provides a radome, an antenna structure and a wireless electronic device. The antenna structure comprises a radome and a radiator located inside the radome; Where (n-1) *[Lamda]1/2 (H1 (n*[lamda]1/2, H1 denotes the thickness of the radome,[Lamda]1 denotes the propagation wavelength of the electromagnetic wave emitted by the radiator in the radome, and n is a positive integer; And/or,L=a*b*[lambda]0, L denotes the length of the line segment from the radiation surface of the radiator to the inner side of the radome, the centerline being a straight line perpendicular to the radiation surface of the radiator, [lambda]0 denotes the propagation wavelength of electromagnetic waves emitted from the radiator in air, a denotes a preset parameter, and b is a positive integer. In this way, the directivity and gain effect of the electromagnetic wave beam can be enhanced, so as to compensate the loss of the electromagnetic wave in the wireless transmission and achieve a longer wireless transmission distance, thereby improving the overall performance of the antenna structure, reducing the area, circuit complexity and corresponding cost required by the conventional design, and enhancing the overall competitiveness of the product.

This invention relates to a gas oil field exploration method and belongs to oil exploration two-dimension earthquake material explanation technique field. The method comprises the following steps: first to figure out the cross earthquake channel; second to compare the explanation of two dimension earthquake; third to extract average vibration and form plane graph and display vibration abnormal area. It can identify the rock abnormal body according to regular excursion earthquake materials and crossing earthquake channel material vibration information difference and the longitudinal resolution rate of the two amounts to one-eighth lamda.

The invention discloses a making method of 5, 10, 15, 20-tetrabenadiphenanthroime [9, 10-b: 9, 10-l]-22, 24-dithioporphyrin compound, which is characterized by the following: reacting phenanthroime pyrrole and 2, 5-di (phenyl hydroxy methyl) thiofuran or 2, 5-di(4-chlorphenyl hydroxy methyl) thiofuran catalyzed by BF3.Et2O under low temperature; displaying 505nm in the Soret band; making the beta-non-aromatic conjugated tetraphenyl-dithioporphyrin move 70nm than red spectrum of Soret and 51nm than middle position-tetraphenyl-2, 3, 12, 13-tetraphenyl-21, 23-dithioporphyrin of lamda max S2TPP; entering into green area over 500nm; fitting for photosensitizer, OFETs, molecular antenna, light-energy switcher, photoelectric switching material, molecular switch, molecular logic door, molecular wire, organic solar energy battery, organic electroluminescent material and non-linear optical material.

The invention provides a novel cotton colorimeter, its sensor is composed of a Y(lamda) sensor and a Z(lamda) sensor groups that including 5 to 10 wave band sensors. The 5 to 10 wave band sensors are respectively sensors of different wave bands in the blue light wavelength range, and the values of the different wave bands in the blue light wavelength range are divided into a first wavelength range, a second wavelength, a third wavelength range, the invention uses at least five Z(lamda) sensors composed of wavelength sensors and one Y(lamda) to reach a measuring result with accuracy of delta Rd <=+-1(%), deltab<=+-0.5(%), which not only assuring the accuracy, but also reducing cost of instrument and cost of measuring.

A stable fuel supply system in a fuel cell system produces heat and electricity by combining hydrogen modified from a major raw material selected from various hydrogen compounds, with oxygen existing in air. A fuel supply device and a fuel supply method in a fuel cell system, which automate a steam to carbon ratio (S/C) control and a lamda control, and achieve a fuel cell system operation efficiently and stably coping with pressure loss and pulsation occurring within the system, while using a minimum number of balance-of-plant (BOP) units. A method more efficiently and precisely supplies fuel during the start-up and operation of the fuel cell system, while preventing flame failure of a burner and maintaining an appropriate carbon monoxide concentration even when an abrupt flow rate variation occurs. Also, an operating method improves functions associated with a decomposition ability based on selection of the specification of a fuel pump, and thus, is more economical and stable in terms of the costs and configuration of the fuel cell system.

Provided is a method for producing a continuous polymer film that involves: a step (1) for overlapping and bonding the rear end section of a preceding raw film and the front end section of a following raw film, along a bonding line; and a step (2) for supporting both end sections by means of a plurality of gripping tools and obliquely stretching the bonded raw film while conveying the bonded raw film in order to produce a polymer film. The oblique stretching is performed such that the angle formed between the in-plane slow axis of the polymer film obtained after oblique stretching and the width direction of the polymer film obtained after oblique stretching is within the range of 40-50 DEG . In the bond between the rear end section of the preceding raw film and the front end section of the following raw film, the angle fai(1) between the bonding line for the polymer film and the width direction of the polymer film and the angle theta(1) between the in-plane slow axis of the polymer film and the width direction of the polymer film fulfill formula (I). Formula (I):|fai(1)-theta(1)|<=10 DEG .

In various embodiments, an asymmetric optical lens (100) may include a proximal volume (102). The proximal volume may include a base surface (106) and an LED recess (108) shaped to receive light emitted by one or more LEDs (109) along a first central light output axis (112). The LED recess may guide the received light along a second central light output axis (110) that is at a first angle (Phi) relative to the first central light output axis. The asymmetric optical lens may also include a distal volume (104) that includes, opposite the base surface, a non-planar light emission surface (114). The distal volume may be shaped to guide light from the proximal portion through the light emission surface along a third central light output axis (116) that is at a second angle (Lamda) to the first central light output axis. The second angle may be greater than the first.

The invention discloses an MOCVD equipment real-time temperature measurement system self-calibration method and belongs to the technical field of semiconductor manufacture. The method includes according to an actual heat radiation ratio, arranging a point according to the actual heat radiation ratio on a theoretical heat radiation ratio-temperature curve trace, substituting the temperature value T corresponding to the point into a calculation formula, and acquiring calibration coefficients m1 and m2. By the aid of the method, the calibration coefficients m1 and m2 corresponding to a first wavelength lamda 1 and second wavelength lamda 2 of a dual wavelength temperature measurement structure can be acquired, the MOCVD equipment real-time temperature measurement system self calibration is implemented, and the consistence and accuracy of epitaxial film growth temperature measurement can be guaranteed.

The invention discloses a two-dimensional multi-antenna cancellation method of a broadband full-duplex system. MN pairs of transmitting antennas are added for self-interference cancellation of a phase cancellation. The MN pairs of the transmitting antennas and a receiving antenna form a circular antenna arrangement structure at a near-end full-duplex node of the broadband full-duplex system, the receiving antenna is located at the center of the circle, the transmitting antennas are arranged on M concentric circles with the receiving antenna serving as the centers of the circles, and each two are arranged in pair on a diameter, the distance from one in each pair to the center of the circle is d, and the distance from the other in each pair to the center of the circle is d+[lamda]i/2 (i=1, 2, ... , M), that is to say, the length of one path differs from the other path by odd times of a half of a signal carrier wave length, and the phase differences are mutually cancelled. Sent signals at the transmitting antennas are firstly divided into M narrow frequency bands by a filter bank having adjacent sub-bands and having an odd symmetry characteristic, then are divided into MN parts by a power divider, and are sent out at the same time and same frequency, the self-interference signals are mutually cancelled and superposed at the receiving antenna, and the interference on the useful signals of the receiving end is reduced significantly.

The invention discloses an electric small-sized fractal monopole antenna (length-0.049. lamda c, width-0.041.lamda c, height-0.068.lamda c, and lamda c represents resonant frequency). The electric small-sized fractal monopole antenna is characterized by comprising a round metal floor and an aerial radiation body, wherein the aerial radiation body comprises radiation bodies respectively composed of circular-arc Gussie.Piano fractal curve conductors, a left inverted-L-shaped conductor section, a right inverted-L-shaped conductor section, a vertical cylindrical helix I connected to the horizontal middle section of the left inverted-L-shaped conductor section, a vertical cylindrical helix I connected to the horizontal middle section of the right inverted-L-shaped conductor section and horizontal circular rings connected to the two vertical cylindrical helixes. The left inverted-L-shaped conductor section and the right inverted-L-shaped conductor section are respectively connected with two fractal curve radiation bodies and are mutually symmetric, one circular-arc Gussie.Piano fractal curve radiation body is directly short-circuited to the metal floor, and the other circular-arc Gussie.Piano fractal curve radiation body is connected with a coaxial feeder. Ideal impedance matching, higher gain and good efficiency of the electric small-sized fractal monopole antenna are achieved, and the electric small-sized fractal monopole antenna has the advantages of being novel in concept, clear in principle, pervasive in method, easy to process and the like.

The invention discloses an indoor unit of an air conditioner. An air supply outlet and two air inlets are formed in a housing; an induced air port is formed between the two air inlets; a through air channel which passes through front and back is formed in the housing; one end of the through air channel communicates with the air supply outlet while the other end of the through air channel communicates with the induced air port; the through air channel comprises an induced air part and an air supply part; two air outlets are formed between the tail end, far from the induced air port, of the induced air part and the starting end, close to the induced air part, of the air supply part; fans are formed between the air outlets and the air inlets, and the separation distance of noise sources generated by operation of the two fans is ranged from 0.33lamda to 0.67lamda, wherein lamda is the transmission wavelength of a fundamental frequency noise of rotation of the fans in air, lamda is equal to v/f, v is the transmission speed of sound waves in air, f is the fundamental frequency of noise of rotation of the fans, f is equal to N/60 *n, N is the quantity of fan blades, and n is the rotating speed of the high air shift fan. Noises from the noise sources generated by operation of the two fans are overlaid and the amplitude is weakened, so that the sound waves are counteracted to reduce the noise.

The invention relates to an inorganic luminescent materials of ultraviolet light solid light source, for metasilicate-based ultraviolet luminary solid illuminating source, which mainly comprises Sr2CaLn2(SiO4)3+-delta, the luminescent central portion comprises Eu+2, Sm+2, Yb+2, Dy+2, Mn+2, Sn+2, and Cu+2 series +2 ions entering the cationic grating nodes, the secondl portion of the luminescent center comprises Ce+3, Eu+3, Tb+3, Sm+3, Dy+3 series +3 TR+3 ions distributed in the nodes, when the chemical index 0<=deata<=0.2, multiple-band white light with optical radiated wavelength lamda<=430nm can be produced at the status of semi-conductor heterojunction shortwave ultraviolet optical excitation using indium nitride and gallium nitride radicals, the color temperature T is between the range of 2500K to 12000K.