935 results about "Main channel" patented technology

A method for forming monodisperse lipoplex assemblies includes providing a microfluidic device having a main microfluidic channel coupled to first and second reactant inlet channels. The first inlet channel is used to deliver a cationic lipid to the main channel while the second channel is used to deliver a nucleic acid. A droplet generation zone is provided in the main channel at the intersection of first and second carrier channels that contain a hydrophobic fluid. The cationic lipid, nucleic acid, and the hydrophobic fluid are then pumped through the device. In the droplet generation zone, shear force from the hydrophobic fluid pinches off droplets. The cationic lipid and nucleic acid are mixed in the generated droplets as the droplets move within a mixing region. A plurality of splitting channels may be coupled to the outlet of the device to produce smaller, monodisperse droplets having picoliter volumes.

A bifurcated intravascular stent graft comprises primary stent segments and a primary graft sleeve, forming a main fluid channel and having a side opening therethrough. An external graft channel formed on the primary graft sleeve has a first end communicating with the side opening and an open second end outside the primary graft sleeve, thereby providing a branch flow channel from the main channel out through the side opening and external graft channel. The primary stent segments and graft sleeve engage an endoluminal surface of a main vessel and form substantially fluid-tight seals. The stent graft further comprises a secondary stent graft, which may be positioned partially within the external graft channel, through the open second end thereof, and partially within a branch vessel. The secondary stent graft engages the inner surface of the external graft channel and the endoluminal surface of the branch vessel, thereby forming substantially fluid-tight seals.

The invention provides a microfabricated device for sorting cells based on a desired characteristic, for example, reporter-labeled cells can be sorted by the presence or level of reporter on the cells. The device includes a chip having a substrate into which is microfabricated at least one analysis unit. Each analysis unit includes a main channel, having a sample inlet channel, typically at one end, and a detection region along a portion of its length. Adjacent and downstream from the detection region, the main channel has a discrimination region or branch point leading to at least two branch channels. The analysis unit may further include additional inlet channels, detection points, branch points, and branch channels as desired. A stream containing cells is passed through the detection region, such that on average one cell occupies the detection region at a given time. The cells can be sorted into an appropriate branch channel based on the presence or amount of a detectable signal such as an optical signal, with or without stimulation, such as exposure to light in order to promote fluorescence.

A method for fabricating a 3D-nonvolatile memory device includes forming a sub-channel over a substrate, forming a stacked layer over the substrate, the stacked layer including a plurality of interlayer dielectric layers that are alternatively stacked with conductive layers, selectively etching the stacked layer to form a first open region exposing the sub-channel, forming a main-channel conductive layer to gap-fill the first open region, selectively etching the stacked layer and the main-channel conductive layer to form a second open region defining a plurality of main channels, and forming an isolation layer to gap-fill the second open region.

The present invention provides a micro liquid control system which, adopting a method to flow a fine target object such as droplets together with a main liquid, allows high speed, large quantity processing for sorting the target object such as the droplets. The system comprises a microchannel, which includes a main channel to flow the main liquid in which the fine target object is dispersed and a sorting channel to sort the target object at the downstream side of the main channel, and a target object selecting means, which selects the target object flowing in the microchannel and supply it to the sorting channel. The target object selecting means comprises electrodes on which the voltage of the same polarity or the opposite polarity is applied to move and select the target object with the attractive or repulsive force.

A method and system for surround sound beam-forming using vertically displaced drivers provides a low cost alternative to present external surround array systems. A pair of vertically displaced speaker drivers is supplied with surround and main channel information in a controlled phase relationship with respect to each driver such that the surround channel information is propagated in a directivity pattern substantially differing from that of the main channel information. The main channel information is generally directed at a listening area, while the surround channel information is directed away from the listening area and is substantially attenuated in the direction of the listening area, so that the surround channel information is heard as a diffuse reflected field. An electronic network provides for control of the surround channel phase relationship and combining of main and surround signals for providing inputs to individual power amplifiers for each driver.

An anchor for securing a therapy delivery element in a desired location within a living body is disclosed. The anchor includes an anchor body having a space, which may be a main channel, to receive the therapy delivery element. A fill port is provided in the anchor body to introduce an adhesive into the space when the therapy delivery element is positioned within the space. In one embodiment, the fill port is coupled to a fill port extension that transfers the adhesive from a dispenser located a distance from the fill port into the space. Multiple fill ports, any of which may be coupled to a respective fill port extension, may be provided to introduce the adhesive at various locations of the space. One or more of the fill ports may extend into multiple side channels to introduce the adhesive at various locations of the space.

A microfluidic device for manipulating particles in a fluid has a device body that defines a main channel therein, in which the main channel has an inlet and an outlet. The device body further defines a particulate diverting channel therein, the particulate diverting channel being in fluid connection with the main channel between the inlet and the outlet of the main channel and having a particulate outlet. The microfluidic device also has a plurality of microparticles arranged proximate or in the main channel between the inlet of the main channel and the fluid connection of the particulate diverting channel to the main channel. The plurality of microparticles each comprises a material in a composition thereof having a magnetic susceptibility suitable to cause concentration of magnetic field lines of an applied magnetic field while in operation. A microfluidic particle-manipulation system has a microfluidic particle-manipulation device and a magnet disposed proximate the microfluidic particle-manipulation device.

An array speaker apparatus SParray includes a first radiation means for driving speaker units so that a first sound S1 of a main channel is radiated to a wall surface W1 on the left or right side of a listening position, and a second radiation means for driving the speaker units so that a second sound S2 the same as the first audio signal is radiated directly to the listening position.

A radiant heating and cooling system clip for positioning a tube and construction support wire with one hand comprising an interior having a main channel for positioning a tube with a narrowing second channel within said main channel for positioning a wire.

A valved connector apparatus is described having an integral opening and closing system operated by axial movement of the valve. The body of the valved connector apparatus is in a Y-shaped configuration with a main channel and a lateral channel branching off of the main channel. A normally dosed, passive hemostasis valve is housed in a valve body that is slidably connected to the proximal end of the main channel. The hemostasis valve is opened by sliding the valve body distally with respect to the Y-shaped connector body so that a cylindrical extension extending from the proximal end of the Y-shaped connector body penetrates a central opening in the hemostasis valve, creating an open passage for insertion of guidewires, catheters or other instruments. The valved connector apparatus allows safe introduction of extremely flexible or fragile guidewires, catheters or other instruments.

A medical port includes a main channel with a lumen to conduct a first fluid through the port, a secondary channel aperture of a secondary channel to add a second fluid in the main channel, at least one housing element and at least one actuation element arranged to be transferable relative to the housing element from a first position into a second position, a seal section, which is arranged to be rotatable between a first position of the seal section, in which the seal section does not close, seal or cover the secondary channel aperture and a second position of the seal section, in which the seal section closes, seals or covers the secondary channel aperture, when the actuation element is transferred from the first position to the second position. A blood hose including at least one port, and a medical treatment apparatus are also described.

The present device is a microchannel separator that uses a separation driving force created by an electric field. An ionic fluid flows through the microchannels and is subjected to an electric field by two spaced apart parallel electrodes possessing an electric charge. The ions in the ionic fluid are attracted towards the charged electrodes and thus are concentrated in the region of flow near the charged electrodes and depleted from the central region of flow between the charged electrodes. The charged electrodes are insulated from the ionic fluid by an impermeable barrier which prevents arcing and adherence of the ions to the charged electrodes. After a sufficient length of passage of the ionic fluid through a main channel two blocking plates separate the flow into a central and two outer output channels. The central channel draws a portion of the ionic fluid from the central region of the main channel that has fewer ions than the ionic fluid in the regions near the charged electrodes. The concentrated ionic fluid in the outer channels is discharged separately from the central channel.

This invention relates to sense through the wall radar. A main channel of a radar system (12) is operated at a frequency capable of penetrating opaque barriers such as the wall (24) of a building (22) to sense targets (16) therein. The main channel performance may be impaired by multipath interference, i.e., radar returns resulting from targets (20) outside the building (22) illuminated by reflection from the wall (24). A guard channel of the radar, operating at a higher frequency which does not penetrate the wall (24), is used to identify targets (20) outside the building (22) and suppress the multipath interference they produce in the main channel.

An air packaging device comprises two layers of thermoplastic films, which form a sealable space where air is fulfilled after a 1^st and a 2^nd steps of heat-sealing process, includes a number of independent sealed air chambers and a main air passage channel. The main channel has an air inlet. Each sealed air chamber is connected with the main channel by at least one of one-way valves each consists of at least two layers of plastic films. At least two of one-way valves are installed inside of the air chambers. This air packaging device increases the cushioning protection where the protection is most needed, but can reduce air chamber dimension at the less important location in order to reduce the volumetric size and hence reduce the shipping cost.

The invention discloses a device and a method for classifying microalgae in ship ballast water. The device comprises a micro-fluidic chip carrying platform, a micro-fluidic chip, direct current driving assemblies, an excitation light source, light filtering assemblies, light detection assemblies and data processing assemblies, wherein the micro-fluidic chip comprises a glass slide, a liquid storage hole A, a liquid storage hole B, a liquid storage hole C, a liquid storage hole D, a liquid storage hole E, a main channel, a first focusing channel, a second focusing channel, a detection channel, an impedance pulse sensing upstream detection channel and an impedance pulse sensing downstream detection channel. By using the micro-fluidic chip as a ship ballast water microalgae classification micro-platform, the device is convenient to carry and high in detection speed. Relevant photoelectric detection equipment can be in a small-size structural form and can be conveniently transported to the field. Therefore, compared with existing large classification equipment, the device has the advantages of small size, light weight, convenience in carrying and the like, and can be handheld for quick field classification.

The invention provides a multi-functional-region cell three-dimensional co-culture method based on a micro-fluidic chip. The chip is composed of a central main channel which is relatively low and side channels which are relatively high and are arranged on two sides, wherein the main channel and the side channels are connected by virtue of trumpet-shaped grid structures. Specifically, the method comprises the following steps: (1) adding collagen solutions different in composition to the sample inlet of the main channel of the chip and applying negative pressure to the outlet of the main channel, wherein the three collagen solutions flow into the main channel and functional regions, which keep distinct boundaries, are formed on the basis of a lamina flow principle; and (2) sterilizing the chip for a whole night through ultraviolet radiation, and directly blending cells to the collagen solutions which are injected into the main channel, so that cell inoculation can be achieved. By virtue of the micro-fluidic chip designed by the invention, a cell three-dimensional culture system, which has a plurality of independent functional regions, can be constructed in one step; and the method has an important application potential in the construction of in vitro complex cell micro-environments.

The invention provides a network control method of a dual-redundancy CAN bus, which comprises five major steps: step 1: switching on a system and carrying out node initialization; step 2: detecting the initialization of the system; step 3: carrying out normal work and cycle detection; step 4: carrying out treatment of abnormality during the operation of the system; and step 5: carrying out the treatment after switching over a main channel and a standby channel. The method fully utilizes a mature CAN device for constructing a dual-redundancy bus network, carries out error detection and specifies control authorities of different nodes through application software, realizes a network control strategy of distributed monitoring and centralized management, simultaneously provides a detailed fault detection method of the CAN bus system and carries out classification on different errors, thereby being easy to realize programming and having strong universality. The network control method improves the fault-tolerant capacity of the CAN bus system and fully utilizes the redundancy mechanism to ensure the reliability of the system; and the network control method has wide practical value and application prospect in the field of mechanical and electrical control.

Channel estimation of block signals containing pilot frequency and balanced method characterizes in containing side channels of force and after of a main channel component in a movable window to determine to get a correct channel estimation interval again to get channel impulse response estimation with the length of N, M or M+2XN, then to take position of home and end of the said window as the positioning information needed by circular convolution of the signal and channel inputs response structure and process the data block via channel transmission as the one after channel distortion via frequency domain balance offset or make time-domain over-sampling channel estimation in the sliding window interval to inerase time-domain resolution of channel estimation. The data block can be IDFT of OFDM or modulated by single carrier.

The invention protects a cross-updated active noise control system based on a novel algorithm for online identification of a secondary channel. The noise control system comprises 6 modules of noise signal filtering, momentum FxLMS algorithm, white noise generator, secondary channel modeling, main channel path and third adaptive filter update module. The object of the noise control system is to solve the problem that an active noise cancellation (ANC) system has a slow convergence speed and a small noise reduction amount in indoor noise-cancellation applications. The innovation lies in the factthat the unevenness of the power spectral density of a noise signal greatly affects the convergence speed of a control filter and a modeling filter in the indoor noise-cancellation applications. Themomentum FxLMS algorithm is proposed to update the weight of the control filter, and a variable step size LMS algorithm is used to update the weight of the modeling filter. The third adaptive filter using the Newton LMS algorithm is used to eliminate an error signal and the signal related to the reference input signal, and improves the modeling accuracy of the modeling filter and the convergence speed of the entire ANC system.

The invention relates to a dispensing device for droplets comprising a first channel (8, 10), known as main channel, for circulation of a first fluid flow, a second channel (12, 13) for circulation of fluid, which forms with the first channel an intersection zone (27) and terminates in an ejection orifice (20), means (4) for measuring a physical property particles or cells in the first channel (18), and means for engendering a pressure wave in the second channel (12, 13).

A method for calibrating a display device having four or more channels, including three main channels which include in their gamut a desired display white point, and one or more further channels, said display device also having one or more individual adjustment controls for each channel. The method uses a series of targets, which are each one or more activated display settings at which the luminance and chromaticity coordinates are measured and recorded.

The invention discloses a flooding damage control method for water-diversion fracture main channels of drill-hole-grouting plugged overburden rock. The method comprises the steps: collecting surface-drilling columnar data of all coal mining areas according to development characteristics of altitude of water-diversion fractured zones of overburden rock mined under specific mining conditions, determining stratum positions of all key strata in the overburden rock by adopting a key stratum position distinguishing method, then, determining development altitude of a water-diversion fractured zone of each area and areas of distribution of communicating strata and water-bearing strata of each area by an overburden rock water-diversion fractured zone altitude prediction method, finally, laying out the range of distribution of the water-diversion fracture main channels in areas of the communicating water-bearing strata of the water-diversion fractured zones. and determining a grouting drilling type and drilling construction parameters according to borehole tunnel positions, coal bed cover depth and ground drill distribution conditions; after drilling construction is completed, pumping slurry to areas of the water-diversion fracture main channels so as to plug water-diversion fracture channels. The flooding damage control method for the water-diversion fracture main channels of the drill-hole-grouting plugged overburden rock, disclosed by the invention, is determined, can adapt to different mining conditions and can provide a guarantee for water resource protection, flooding damage control and the like of coal mining of mining areas, the use method is reliable, and the practicability is high.

Signals in a multi-channel, impaired communication system are post-processed at the receiver. A triangular matrix Decision Feedback Demodulator (DFD) at the receiver extracts channels without requiring delivery of receiver parameters to the transmitter. Multi-Input Multi-Output (MIMO) processing matrices and DFD parameters are computed by first applying matrix transformations to diagonalize the noise covariance matrix of the multiple channels received at the receiver. QR decompositions (i.e., decompositions into orthogonal and triangular matrices) are then applied to the main channels to obtain triangular channel matrices. The noise-diagonalizing transformations and QR decompositions are then combined to form the MIMO postprocessing matrices and DFD parameters. MIMO postprocessing matrices and DFD parameters are computed from training data and then adapted during live data transmission.

The invention relates to light solidifying rapid forming photosensitive resin liquid level control and resin bed coating method and device. The method combines the resin liquid level control with the resin bed coating in rapid forming, uses micro pump to inject resin into scraper by flexible duct, and finishes the level control and coating while the scraper is doing horizontal movement on the main channel liquid surface. The invention overcomes the defects of uneven resin coating and low thickness precision. In addition, it has little influence for the resin liquid level fluctuation without waiting to nature flow flat for long time. Thus it can increase work efficiency.

The invention relates to a microfluidic chip for sorting and an application thereof, and in particular discloses a microfluidic chip for sorting. The chip comprises a chip inlet, a main channel and a chip outlet, wherein the chip inlet is used for a liquid to be sorted to flow in; the main channel is used for the liquid to be sorted to flow; the chip outlet is used for discharging the sorted liquid; the main channel includes an inlet channel, an outlet channel and a capturing area channel, wherein the inlet channel is positioned on the chip inlet, the outlet channel is positioned on the chip outlet, and the capturing area channel is positioned between the inlet channel and the outlet channel; and a plurality of small collecting rooms which are provided with downward openings and used for collecting target materials to be sorted are formed in the capturing area channel. In addition, the invention further provides a microfluidic chip device and a microfluidic chip kit for sorting and a method for sorting target cells or other substances. The microfluidic chip disclosed by the invention has the advantages of simplicity in manufacturing and good operability and repeatability, the area of a cell sorting area is greatly increased, and the high-flow cell sorting is supported.

Method and apparatus for a plunger lift mechanism with a main channel disposed between a first and second valve. The first valve is closed by engaging a sealing member to a first seat at a proximal end of the main channel and the second valve consequently closes to with a sealing member engaging a second seat at a distal end of the main channel. An amount of pressure accumulates on a first side of the plunger lift to overcome a pressure on a second side of the plunger lift to force the plunger lift to traverse a well bore and evacuate any fluids present above the plunger lift.

An apparatus for a plunger lift mechanism with a main channel disposed between a first and second valve. The first valve is closed by engaging a sealing member to a first seat at a proximal end of the main channel and the second valve consequently closes to with a sealing member engaging a second seat at a distal end of the main channel. An amount of pressure accumulates on a first side of the plunger lift to overcome a pressure on a second side of the plunger lift to force the plunger lift to traverse a well bore and evacuate any fluids present above the plunger lift.

The invention provides a dessert reservoir forecasting method and forecasting device. The method includes the steps: delineating the distribution range of a favorable sedimentary facies belt of a target layer based on ancient landform restoration technology of seismic sequence stratigraphic interpretation; forecasting the spreading range of main channel sand within the distribution range of the favorable sedimentary facies belt based on seismic attribute quantitative analysis technology of forward modeling; forecasting reservoir physical property distribution within the spreading range of the main channel sand based on CRP (common reflection point) gather optimization pre-stack elastic impedance inversion technology. Multiplicity caused by directly forecasting reservoir physical properties by the aid of three-dimensional seismic data in the prior art is reduced, so that low-permeability clastic rock reservoir forecasting accuracy is improved.

A pilot-type water discharging/stopping and flow regulating valve device capable of performing both the discharging/stopping of water and the regulation of flow by light operations, and capable of, once the flow is regulated, discharging the water at a pre-regulated specified flow in the next water discharge even if the water is stopped.

The pilot type water discharging/stopping and flow regulating valve device has a main valve, a back pressure chamber, an introducing small hole, a pilot channel and a flow regulating mechanism. The flow of the main channel is regulated by advancing and retreating the main valve following the advance/retreat of a pilot valve. The valve device further has a water discharging/stopping switching mechanism that switches between the discharging and stopping of water by advancing and retreating the pilot valve between a water discharge position and a water stop position. Furthermore, the flow regulating mechanism is configured to maintain the flow regulating position of the pilot valve at a previously regulated flow regulating position when the water discharging/stopping switching mechanism causes the pilot valve to perform water discharging operation after causing the pilot valve to perform water stopping operation.