33 results about "Scattering channel" patented technology

The invention provides an inversion method for an extinction coefficient of an aerosol based on a Raman-Mie scattering laser radar, comprising the steps of: Step 1: obtaining an echo signal of a Ramanchannel in the Raman-Mie scattering laser radar, and determining an lidar ratio of the aerosol by Ansmann method, that is, obtaining the extinction coefficient and a backscattering coefficient of theaerosol by using Raman method; Step 2: obtaining an echo signal of a Mie channel in the Raman-Mie scattering laser radar, and inverting a distribution profile of the extinction coefficient of the aerosol based on Fernald method; and Step 3: correcting, based on an inversion result of the Raman method in step 1, key parameters required to invert the distribution profile of the extinction coefficient by using the Mie scattering method in step 2, that is, a boundary value of the extinction coefficient of the aerosol, thereby improving the inversion precision of the distribution profile of the extinction coefficient of the Mie scattering channel. According to the inversion method for the extinction coefficient of the aerosol based on the Raman-Mie scattering laser radar provided by the invention, high-precision detection of aerosols is achieved by combining the characteristics of Raman scattering and Mie scattering.

A system, method, and apparatus are provided for flow cytometry. In one example, the flow cytometry system includes dual laser devices and dual scatter channels to measure velocity of particles in a core stream of sample fluid. The total flow rate of the sample fluid and the sheath fluid around the sample fluid is controlled, and thus held constant, by a feedback control system controlling a vacuum pump based on differential pressure across ends of a flow channel in the flow cell.

Methods for chemically-resolved optical microscopy are presented. The methods can provide a wide-field, spatial interference imaging using multiple nonlinear scattering channels to produce multiple, spatially coherent anti-Stokes Raman scattering (CARS).

Methods for chemically-resolved optical microscopy are presented. The methods can provide a wide-field, spatial interference imaging using multiple nonlinear scattering channels to produce multiple, spatially coherent anti-Stokes Raman scattering (CARS).

A multi-modal data acquisition system for detecting target material on a biological reaction surface, the system comprising a radiation source for generating an incoming beam that impinges on the biological reaction surface at an oblique incidence angle and produces a reflected beam, an interferometric detector for detecting an interferometric signal from the illuminated surface, the reflected beam being directed to the interferometric detector, a fluorescence detector for detecting a fluorescence signal from the illuminated surface; the fluorescence detector being positioned to substantially minimize the incidence of the reflected beam; and a processing system for receiving the interferometric and fluorescence signals and determining the presence or absence of target material on the biological reaction surface. A reaction surface conditioned for the simultaneous collection of fluorescence, interferometric and other signals. A multi-modal data acquisition system for collecting and processing additional modes, including multiple interferometric, fluorescence and scattering channels.

The invention discloses a modem applicable to a super remote distance scattering link and relates to a scattering communication system which is remote in communication distance, serious in frequency offset and low in signal to noise ratio in the field of communication. The modem is composed of components such as a modulator, a demodulator, an intermediate frequency amplifier, an auxiliary multiplexer, an auxiliary demultiplexer and a rubidium clock unit. According to the modem, through adoption of a channel coding and decoding technology based on a CCSDS standard, a wireless communication system is applicable to a scattering channel environment with an ultra low signal to noise ratio, thereby ensuring high-reliability transmission of business. According to the modem, a secondary spread spectrum plus pilot demodulation method, a low receiving threshold of devices is ensured, synchronous rapid establishment and keeping of the devices are realized in a high frequency offset state, and the method is especially applicable to high-quality high-reliability transmission of the business on the remote distance scattering communication link under a Rayleigh deep fading channel condition.

The invention discloses a foodstuff processing and scattering integrated automatic-processing device for aquaculture. The foodstuff processing and scattering integrated automatic-processing device comprises a main processing box body, wherein a raw material putting hopper is arranged on the right side of the top side wall of the main processing box body, an automatic lifter is obliquely arranged on the right side of the main processing box body, a hot air fan is also arranged below the left of the automatic lifter, a waste air guiding pipe is also communicated to the top cylinder wall of the main processing box body, the left side of the bottom of the main processing box body is communicated to a cylindrical foodstuff stirring chamber through a blanking channel, multiple arc-shaped foodstuff stirring pieces are arranged on the circumference of a clockwise rotating shaft body, and a foodstuff scattering channel pipe is also integrally arranged at the left lower corner discharging port of the cylindrical foodstuff stirring chamber. The moisture contained in raw materials is prevented from affecting a follow-up smashing process, purified air can return to a tank body through a recovery air pipe under the effect of an air pump, the foodstuff scattering channel pipe makes aquaculture foodstuff scattering more comprehensive and uniform, and aquatic products have good growth vigor.

The invention relates to an ultralow frequency transcranial magnetic induction stimulation device, belonging to the technical field of medical instruments. The ultralow frequency transcranial magnetic induction stimulation device comprises a main body and a transcranial magnetic induction acting chair armrest, the main body is provided with a display console, an ultralow frequency magnetic induction delivery spool is arranged on the right side of the main body, the ultralow frequency magnetic induction delivery spool is connected with the transcranial magnetic induction acting chair armrest through an input sleeve opening, a head rest is arranged in back of a leg supporting cushion, a head resting groove is formed in the front of the head rest, meridian massage grooves are formed on the left and right sides of the head resting groove, strip massage protrusions are formed in the meridian massage grooves, a hood lifting adjustor is arranged on the back of the head rest, a scattering channel is formed inside a transcranial magnetic induction acting cover, the scattering channel is provided with an integrated opening, and a delivering straight pipe is arranged below the scattering channel. The device is complete in function and convenient to use, and is time-saving, labor-saving, scientific, convenient, safe and efficient when being used for cerebral magnetic induction stimulation therapy of psychiatric patients, thus relieving the working difficulty of medical staffs.

A system, method, and apparatus are provided for flow cytometry. In one example, the flow cytometry system includes dual laser devices and dual scatter channels to measure velocity of particles in a core stream of sample fluid. The total flow rate of the sample fluid and the sheath fluid around the sample fluid is controlled, and thus held constant, by a feedback control system controlling a vacuum pump based on differential pressure across ends of a flow channel in the flow cell. A stepper flow control valves are disclosed that apply a physical fluid resistance to a flow of sheath fluid in the flow cytometer. The physical fluid resistance regulates a flow rate of the sheath fluid and thereby regulates a flow rate of sample fluid in the flow cytometer.

The invention provides a scattered light and fluorescent light bimodal flow imaging system. The system comprises a multicolor orthogonal lighting unit, a multichannel microimaging unit and a feeding tube, wherein the multicolor orthogonal lighting unit comprises an excitation light source and a beam shaping module, the multichannel microimaging unit comprises an objective lens, a multispectral image divider and multiple cameras, and the feeding tube is coaxial with the objective lens. The excitation light source can emit exciting light with two or more wavelengths, and the exciting light perpendicularly illuminates the feeding tube at the position overlapping with a focal plane of the objective lens after being shaped by the beam shaping module. The objective lens collects scattered lightand fluorescent light which are emitted by bio-particles, and the multispectral image divider projects the scattered light and the fluorescent light to the different cameras for imaging through a scattering channel and one or more fluorescent light channels according to a specific spectral passband. According to the whole system, the principle is based on a lateral scattered light and fluorescentlight emission microimaging technology of light-sheet lighting, a more accurate plankton observation result can be obtained, and the system can adapt to a wider-spectrum water plankton species range and meet the online measurement demand on non-living particulate matter.

The invention relates to a touch key device which comprises a touch sensing element, a control circuit board electrically connected with the touch sensing element, a support device arranged between the touch sensing element and the control circuit board, and a lighting element arranged below the touch sensing element, wherein a scattering channel is arranged in the support device. Light emitted by the lighting element scatters through the scattering channel.

A system, method, and apparatus are provided for flow cytometry. In one example, the flow cytometry system includes dual laser devices and dual scatter channels to measure velocity of particles in a core stream of sample fluid. The total flow rate of the sample fluid and the sheath fluid around the sample fluid is controlled, and thus held constant, by a feedback control system controlling a vacuum pump based on differential pressure across ends of a flow channel in the flow cell.

The invention belongs to the field of electric system grounding for lightening protection, and relates to a multi-current scattering arm star-shaped grounding electrode topological structure. The multi-current scattering arm star-shaped grounding electrode topological structure is specifically suitable for a grounding electrode in a pole tower earth screen. A novel grounding electrode arrangement form is designed so that an impact grounding resistance value under a high earth resistivity can be reduced. According to the arrangement form, current scattering channels, in the grounding electrode, of a lightning current are increased, namely, each radiation branch of the star-shaped grounding electrode is additionally provided with at least one bifurcate current scattering arm, one end of each bifurcate current scattering arm is connected with the tail end of the corresponding radiation branch, the other end of each bifurcate current scattering arm extends in the radial direction, therefore, the better current scattering effect can be achieved, the impact performance of a grounding body is effectively improved, and the impact grounding resistance value of the grounding electrode is reduced. The structure is easy to manufacture and install, construction difficulty caused by the fact that the grounding electrode is lengthened blindly is avoided, a very good resistance reducing effect can be achieved, the performance is superior, and the structure is economical and reasonable.

The invention discloses a single-image defogging method based on an extreme scattering channel, and relates to the field of image processing, and the defogging method comprises the steps: obtaining anoriginal foggy image; constructing a foggy day imaging physical model; dark channel prior; performing bright channel prior; complementing a bright channel prior result and a dark channel prior resultto form an extreme channel, and performing extreme channel scattering analysis; estimating the transmittance; estimating atmospheric light; and calculating to obtain a final defogged clear image according to the transmissivity, atmospheric light and foggy day imaging physical model given by the extreme channel prior. According to the invention, a brand-new prior hypothesis of extreme channel prior is provided to estimate transmissivity and atmospheric light; according to the defogging method, correct defogging can be conducted on areas such as sky or white objects, the effect is good, the accuracy is higher, the defogging effect on dense fog is remarkable, color distortion is not likely to be caused, the final defogging color is natural and real, and the definition is high.

The invention discloses a signal power measurement method suitable for a scattering channel, which relates to the field of wireless communication and comprises the following steps of: 1) determining acoherent bandwidth; 2) frequency hopping design; and 3) determining and calculating the time length of the signal average power. The invention aims to solve the problems that the signal acquisition time is long during scattering channel signal power measurement; the problem that the frequency selective fading influence cannot be reduced while the time selective fading influence is reduced is solved; according to the invention, the frequency diversity and time diversity thought is combined; through short-time statistics of frequency hopping signals, the influence of frequency selective fadingand time selective fading is greatly reduced, accurate measurement of signal power can be rapidly realized, and the method can be applied to signal power measurement under various fading channels, andplays a key role in application of antenna alignment, fading channel analysis and the like.

The present invention relates to the field of optical communication and provides a method and system for arranging link resource fragments. The method comprises: configuring cascade services in a link in advance; generating a preset arrangement method according to an initial channel number of occupied channel(s) in the link and a cascade number of service born in the channel(s) (S210); a local end node that initiates a link resource arrangement notifying an opposite end node to arrange link resource fragments (S220); the local end node and the opposite end node reconfiguring a cross connection according to the preset arrangement method (S230). The method and system of the present invention can re-arrange the channel resources within one link, and integrate the scattered channel resource fragments into complete and available resources with a broader bandwidth, thus achieving the maximum utilization of the link bandwidth resources.

A medical ultrasonic esophagoscope tube includes a radial air bag (4), a medium hole (5), a medicine scattering channel, a buffer air bag (7), and a deformation sensor (8). The buffer air bag (7) is located in a tail end of a head skeleton (1), the surface of the buffer air bag (7) is covered by a head cuff (2), and the buffer air bag is made of elastic materials. The deformation sensor (8) is installed or positioned inside or outside the buffer air bag. The deformation sensor (8) can sense the shape change of the buffer air bag (7). A medical ultrasonic esophagoscope with the tube is provided. The medical ultrasonic esophagoscope tube and the medical ultrasonic esophagoscopeare low in cost, and are convenient and practical. A plurality of current technical problems of the conventional esophagoscope tube and esophagoscope are solved.

The invention discloses a scattering channel environment parameter measuring device which is high in automatic degree, convenient to transport, mount and use, and capable of achieving long-term measuring and storing of scattering channel environment parameters. The scattering channel environment parameter measuring device comprises a scattering channel environment parameter measuring unit, a time unit, a processing and storing unit, a display unit, a communication interface unit and a power source. Through actual application, it is proved that the scattering channel environment parameter measuring device has a good practical effect.

The invention relates to a preparing method for a finned inner cooling structure cooling pipe based on gel electrochemical machining. The method specifically comprises the steps that preprocessing is carried out, and internal pipe flaw detecting and surface cleaning are carried out; the activating treatment should be carried out after inert metal is cleaned; a machining stage mainly comprises device platform establishing and an electrochemical machining stage, manual machining and automatic machining can be selected in the machining process in a self-service mode, and the machining efficiency is improved; a postprocessing stage mainly comprises checking and post cleaning, and purified clean water is used for performing cleaning during the experiment. The gel electrolyte comprising NaNO3 is planned to be utilized for being prepared into a rib shape, an electrode is selectively wrapped and machined to serve as a negative electrode, a machining piece serves as a positive electrode, and electrochemical machining is carried out. The preparing method is particularly suitable for machining of a finned inner cooling structure of the inner wall of a traditional pipeline, whether gel electrolyte is in contact or not can be controlled in a reaction area other structures of the pipeline cannot be affected, a finned cooling structure of the inner wall of the pipeline is achieved, and the cooling performance of a scattering channel is improved.

The invention provides a multi-input multi-output (MIMO)-based troposphere scatter communication random channel modeling method. Aiming at the situation of long-distance signal transmission under the technical background of MIMO, a troposphere scatter channel is selected as a research object. A troposphere is modeled into a differentiable curved surface according to the turbulent phenomenon of the troposphere; and scatterers are distributed on various points of the curved surface at random. According to the modeling method, firstly, an energy loss distribution model for scattered waves on the scatterer surfaces after electromagnetic waves enter the scatterers is established according to the turbulent incoherent scattering theory; energy losses are quantified according to the model; secondly, the invention provides a calculation method of a beam transmission distance under MIMO; and finally, a fading coefficient and a channel matrix of the MIMO-based troposphere scattering channel are deduced.

The invention discloses a channel intelligent cognition based unattended scattering opposite end control device, relating to the field of communication. By adopting a digital signal processing technology and comprehensively using a reception level, number of false codes and error codes and real-time signal to noise ratio, the device cognizes slow fading loss of a scattering channel, and the device performs comprehensive adaptive adjustment on transmit power and transmit rate according to a cognition result, so that the power and rate of a scattering device are intelligently matched with the scattering channel, and the scattering device can be controlled automatically in a long distance and realizes unattended operation function. The device also has characteristics of simple circuit structure, high integration, stable and reliable performance, good transportability and low cost. The device is particularly suitable for the control device in the unattended scattering communication station.

The invention discloses a frequency hopping method suitable for a scatter communication system, and relates to the technical field of communication. The frequency hopping method comprises the following steps: 1) transmitting a signal; and 2) receiving the signal. According to the frequency hopping method disclosed by the invention, the scatter channel fading is resisted by using frequency hopping,interleaving and coding through the hidden diversity technology, the high rate and high real-time requirements of the system are met, the performance of the traditional scatter communication system is greatly improved without increasing the system complexity or hardware equipment, the problem that the traditional frequency diversity scheme causes high system complexity and low performance when used for coping with the channel fading phenomenon, the complexity of the traditional scatter communication system is simplified, the system cost is reduced, and the market expectation is broad.

The invention discloses a modem suitable for an ultra-long-distance scattering link, which relates to a scattering communication system with long communication distance, serious frequency deviation and extremely low signal-to-noise ratio in the communication field. It consists of modulator, demodulator, intermediate frequency amplifier, auxiliary multiplexer, auxiliary splitter, rubidium clock unit and other components. The invention adopts the channel coding and decoding technology based on the CCSDS standard, so that the wireless communication system can be applied to the scattered channel environment with extremely low signal-to-noise ratio, and ensures high reliability transmission of services. The present invention also adopts the demodulation method of secondary spread spectrum and pilot frequency to ensure the low receiving threshold of the equipment and realize the rapid establishment and maintenance of equipment synchronization under the state of large frequency deviation. It is especially suitable for high-quality and high-reliability transmission of services on long-distance scattering communication links under the condition of Rayleigh deep fading channel.

The invention discloses a laboratory simulation method of atmosphere multiple-scattered channel laser communication pulse transmission. According to the method, the time impulse response function of an atmosphere multiple-scattered channel is calculated by using the Monte Carlo light tracking technique; the time-domain fluctuation data of receiving optical power is calculated by using a random phase screen-based laser atmospheric turbulence transmission numerical value simulation method; a computer is utilized to generate data signals which are subject to intersymbol interference according to the time impulse response function of the channel; and the data signals which are subject to intersymbol interference and the fluctuation influence of the receiving optical power caused by atmospheric turbulence are applied to optical signals through an electro-optic modulator. The method can simultaneously simulate intersymbol interference and the fluctuation effect of the receiving optical power and can provide atmospheric environment simulation support for the indoor performance test of an optical communication end machine.

An artificial rainfall rocket projectile catalyst scattering device based on molten metal comprises a scattering body (1), a piston (2), the molten metal (3) and a piston seat (4), before lunching, the molten metal (3) fixes the piston and seals a scattering channel, after the catalyst is ignited, the molten metal (3) is molten, and the piston (2) exits from the scattering channel for passing of catalyst smog. The structure of the existing artificial rainfall rocket projectile is simplified, the scattering device is more compact in structure, the characteristic that the molten metal melts at 90 DEG C is used, the problem that artificial rainfall rocket projectile piston scattering devices cannot guarantee channel sealing performance and piston passing performance simultaneously is solved, the catalyst is scattered at the tail, the base drag of the artificial rainfall rocket projectile can be effectively reduced, and the range can be enlarged.

The invention relates to a preparing method for a finned inner cooling structure cooling pipe based on gel electrochemical machining. The method specifically comprises the steps that preprocessing is carried out, and internal pipe flaw detecting and surface cleaning are carried out; the activating treatment should be carried out after inert metal is cleaned; a machining stage mainly comprises device platform establishing and an electrochemical machining stage, manual machining and automatic machining can be selected in the machining process in a self-service mode, and the machining efficiency is improved; a postprocessing stage mainly comprises checking and post cleaning, and purified clean water is used for performing cleaning during the experiment. The gel electrolyte comprising NaNO3 is planned to be utilized for being prepared into a rib shape, an electrode is selectively wrapped and machined to serve as a negative electrode, a machining piece serves as a positive electrode, and electrochemical machining is carried out. The preparing method is particularly suitable for machining of a finned inner cooling structure of the inner wall of a traditional pipeline, whether gel electrolyte is in contact or not can be controlled in a reaction area other structures of the pipeline cannot be affected, a finned cooling structure of the inner wall of the pipeline is achieved, and the cooling performance of a scattering channel is improved.

A system, method, and apparatus are provided for flow cytometry. In one example, the flow cytometry system includes dual laser devices and dual scatter channels to measure velocity of particles in a core stream of sample fluid. The total flow rate of the sample fluid and the sheath fluid around the sample fluid is controlled, and thus held constant, by a feedback control system controlling a vacuum pump based on differential pressure across ends of a flow channel in the flow cell.

The invention provides a method for adjusting phase consistency of ultracold scattering channel wave functions of a three-atom system on the basis of adjacent position coupling integral and belongs to the field of ultracold atoms and molecule physics related quantum mechanical theory. The method includes that under the condition that the phase of channel wave functions phiV (R1, omega) at the position of R1 is well adjusted, and the channel functions phiv (R1, omega) at the position of the R1 are adjusted to the same phase one by one; only hypersphere harmonic functions phi <HHS> (omega) at the position of the R1 are taken as reference functions, and the channel wave functions at the position of Ri-1 are used at the position of Ri. With the method, the situation that the hypersphere harmonic functions phi <HHS> (omega) are taken as the reference functions at all the positions is avoided, and calculated amount is reduced; the phase is adjusted through integral of the channel wave functions at the neighboring positions, and numerical calculation is more easy to implement.