17 results about "Channel geometry" patented technology

The invention discloses a flow battery performance improvement method based on flow channel geometrical shape optimization, and provides a calculation formula of a performance optimal coefficient (POC) in order to solve the problem of multi-parameter coupling in a traditional flow channel design method. Through the formula, an optimal coefficient can be calculated according to geometric parameters (such as flow channel width, rib width, sectional area, diagonal length, flow velocity and the like) of the flow channel, and the optimal coefficient is used for quantifying the influence of different flow channel geometric shapes on the battery performance. The formula not only simplifies the complex flow channel design process, but also can accurately predict the performance of the geometric structure of the flow channel in practical application. By accurately controlling parameters such as runner width, rib width, flow velocity, pump power and the like, the energy loss can be reduced while the optimal battery performance is maintained.

Embodiments herein provide for fluidic cooling assemblies embedded within a device package and related manufacturing methods. In one embodiment, the integrated cooling assembly includes a semiconductor device and a cold plate attached to the semiconductor device. The cold plate has a perimeter sidewall, a top portion and pairs of opposing cavity sidewalls. The perimeter sidewall extends downwardly from the top portion to a backside of the semiconductor device to define a perimeter of the cold plate. Each pair of opposing cavity sidewalls extends downwardly from the top portion towards the backside of the semiconductor device to define a coolant chamber volume therebetween. A distance between each pair of opposing cavity sidewalls in a direction parallel with the backside of the semiconductor device defines a width of a corresponding coolant chamber volume and a spacing between adjacent coolant chamber volumes, wherein the ratio of width to spacing is about 1:1.

A semiconductor device comprising a first nanosheet located on top of a substrate, wherein the first nanosheet is tapered the Y-direction to have a width W1 and the first nanosheet is tapered in the X-direction to have a length L1. A second nanosheet located on top of the first nanosheet, wherein the second nanosheets is tapered in the Y-direction to have a width W2 and the first nanosheet is tapered in the X-direction to have a length L2. Wherein the widths W1 and W2 are different from each other and the lengths L1 and L2 are different from each other and wherein the substrate includes a tapered surface in the Y-direction.

A flow cell with optimized flow channel geometry is provided. A flow cell of interest includes a cell configured to transport particles in a flow stream, the cell having a flow channel having a rectangular cross-section and an aspect ratio ranging from 1.0 to 1.4. Flow cytometers with the subject flow cells and methods of use and assemblies thereof are also provided.

This invention discloses an automatic sealing system and method for circuit boards, relating to the field of printed circuit technology. The method includes: acquiring a set of device height points, extracting a centerline coordinate set, a width set, and a no-coating coordinate set; calculating the entry cutoff level based on the centerline coordinate set and the width set, calculating the drift candidate coordinate set based on the device height point set and the width set, and generating a restricted deposition partition table; generating a restricted deposition command based on the restricted deposition partition table, the entry cutoff level, and the drift candidate coordinate set; driving the nozzle along the entry barrier trajectory to form an entry barrier layer according to the restricted deposition command, forming a barrier band outside the no-coating coordinate set, and injecting deposition according to the injection and discharge sequence and the guiding airflow sequence, and suppressing the drift candidate coordinate set according to the recovery airflow sequence; and outputting sealing record data. This invention can cope with the switching of material transport mechanisms caused by narrow channel geometry, avoiding the limitations of traditional two-dimensional trajectory optimization.

The invention provides a micro-channel fluid simulation method and system, and the method comprises the steps: constructing a D2Q9 model through a lattice Boltzmann method according to a to-be-simulated micro-channel geometric structure, setting basic parameters of the D2Q9 model, and initializing distribution functions of a flow field, a temperature field and a phase field and a corresponding equilibrium state distribution function; respectively executing collision and propagation operations on distribution functions of a flow field, a temperature field and a phase field based on a single relaxation lattice Boltzmann method, and simulating movement among fluid particles, energy transmission and evolution of a two-phase interface; setting boundary conditions of the D2Q9 model, and calculating a macroscopic physical quantity representation simulation result of the fluid at each moment according to an evolution result of each distribution function after collision propagation; and when the D2Q9 model meets a preset simulation termination condition, outputting a D2Q9 model simulation result in a standard data format. According to the scheme, the accuracy of micro-channel internal flow simulation can be improved, and the simulation calculation efficiency is guaranteed.

A gate-all-around transistor includes a gate structure having sidewalls; a first and a second gate spacer positioned laterally on each sidewall, wherein the gate structure has a gate length between the sidewalls of the gate structure, the gate length having a midpoint; a first inner spacer under the first gate spacer; and a second inner spacer under the second gate spacer. A channel layer extends from below the first inner spacer, across the gate length to below the second inner spacer. The channel layer includes a first region having a first thickness and located below each of the gate spacers; and a second region having a continuously variable thickness, the second region located laterally between the first regions and being symmetrical in reference to the midpoint of the gate length.

The application provides a design method of a two-way flow channel pump station outlet flow channel based on Dean vortex theory and a two-way flow channel pump station outlet flow channel, and comprises the following steps: based on Dean vortex theory, defining the curvature ratio and width ratio of the two-way pump station in the geometric coordinate system respectively, and establishing a mathematical model of the outlet flow channel geometry about the curvature ratio and the width ratio; establishing a plane rectangular coordinate system in the outlet flow channel center line, obtaining the curvature ratio and the width ratio of the outlet flow channel center line; calculating the outlet flow channel center line curvature radius, and obtaining the outlet flow channel center line curvature radius range; calculating the change relationship of the outlet flow channel width with the horizontal axis coordinate; obtaining the function relationship of the curvature ratio and the width ratio about the outlet flow channel center line along the way respectively, and determining the outlet flow channel geometry based on the function relationship. The application optimizes the water flow characteristics in the flow channel by accurately controlling the curvature and width change of the flow channel center line, thereby reducing the energy loss and improving the operation efficiency of the pump station.

Flow cells having an optimized flow channel geometry are provided. Flow cells of interest include a cuvette configured to transport particles in a flow stream, the cuvette having a flow channel with a rectangular cross-section and an aspect ratio ranging from 1.0 to 1.4. Flow cytometers having the subject flow cells and methods of use and assembly thereof are also provided.

The invention relates to the technical field of analytical instruments, in particular to a compression ionization channel for a mass spectrometer ionization chamber flow channel, and the compression ionization channel comprises a flow channel body which is in a contracted geometrical shape and is gradually contracted from the inlet end of the flow channel body to the outlet end of the flow channel body. The invention aims to solve the technical problems that the ionization efficiency of a sample is low, ion beam diffusion is caused by the space charge effect of ionized ions, the pressure gradient transition is unreasonable, and the efficiency is low in the mass spectrum process, and the like, and the ion capture efficiency is improved and the loss is reduced by optimizing the geometric structure of a channel and selecting materials. The sensitivity and the stability of the instrument are enhanced; and the method is of great significance in improving the precision and reliability of mass spectrometry.

The present invention relates to a method, device, vehicle, and medium for detecting the flow field uniformity of a fuel cell. The method comprises: gridding the flow channel geometry data of a single-plate battery to determine multiple flow channels; determining single-channel data for each of the flow channel geometry data; determining single-plate flow field data for the single-plate battery based on the single-channel data; determining single-plate resistance based on the single-channel data and the entire stack model data when the single-plate flow field data satisfies flow field uniformity requirements; and determining entire stack flow field data based on the single-channel data and the entire stack model data. Embodiments of the present invention can improve the detection accuracy of flow field uniformity for single-plate batteries and fuel cells after stacking.

Embodiments herein provide for fluidic cooling assemblies embedded within a device package and related manufacturing methods. In one embodiment, the integrated cooling assembly includes a semiconductor device and a cold plate attached to the semiconductor device. The cold plate has a perimeter sidewall, a top portion and pairs of opposing cavity sidewalls. The perimeter sidewall extends downwardly from the top portion to a backside of the semiconductor device to define a perimeter of the cold plate. Each pair of opposing cavity sidewalls extends downwardly from the top portion towards the backside of the semiconductor device to define a coolant chamber volume therebetween. A distance between each pair of opposing cavity sidewalls in a direction parallel with the backside of the semiconductor device defines a width of a corresponding coolant chamber volume and a spacing between adjacent coolant chamber volumes, wherein the ratio of width to spacing is about 1:1.

The invention relates to a micro-fluidic chip for heterogeneous cell electrofusion, which is characterized in that a partition wall and two micro-channels are arranged in the chip, the two micro-channels are bilaterally symmetrical by taking the partition wall as a symmetry axis, and each micro-channel is provided with a main channel and a bypass channel; a plurality of capturing cavities are formed in the main channel; the bypass channel is shunted from the main channel at the inlet of each capturing cavity, extends towards the direction far away from the main channel and then turns back in a detour manner, and the bypass channel and the main channel are converged at the outlet of the capturing cavity; a fluid resistance difference exists between the main channel and the bypass channel, so that a cell suspension preferentially enters the capturing cavity of the main channel to capture a single cell when entering; the capturing cavities which are symmetrical left and right are communicated through a pairing channel, so that the two captured cells are in close contact and are fused under the action of a pulse signal to form a binuclear heterogeneous cell. Through special flow channel geometric design and fluid resistance matching, efficient and accurate pairing and electric fusion of heterogeneous cells are realized, and the method has the advantages of high flux, good fusion rate, less non-specific fusion and the like.

This invention belongs to the field of integrated sensing technology for millimeter-wave communication, specifically relating to a sensing-assisted adaptive tracking method for millimeter-wave channels. The method includes: constructing a time-division duplex frame structure, divided into sensing time slots and communication time slots; in the downlink phase of each sensing time slot: updating the environmental scatterer set information through a multi-target tracking algorithm to construct the channel geometry, including determining multiple non-line-of-sight propagation paths and the path parameters of each path; constructing the geometry of each path based on its path parameters; in the uplink phase: acquiring the prior geometry of each path and the statistical prior of the complex gain of the current sensing time slot to obtain the updated complex gain of that path; in the uplink phase of each communication time slot: acquiring the prior geometry of each valid existing path and the statistical prior of the complex gain of the current communication time slot to obtain the updated complex gain of that path. This invention achieves adaptive channel tracking for dynamic scenarios with path creation and disappearance.

Embodiments herein provide for fluidic cooling assemblies embedded within a device package and related manufacturing methods. In one embodiment, the integrated cooling assembly includes a semiconductor device and a cold plate attached to the semiconductor device. The cold plate has a perimeter sidewall, a top portion and pairs of opposing cavity sidewalls. The perimeter sidewall extends downwardly from the top portion to a backside of the semiconductor device to define a perimeter of the cold plate. Each pair of opposing cavity sidewalls extends downwardly from the top portion towards the backside of the semiconductor device to define a coolant chamber volume therebetween. A distance between each pair of opposing cavity sidewalls in a direction parallel with the backside of the semiconductor device defines a width W of a corresponding coolant chamber volume and a spacing S between adjacent coolant chamber volumes, wherein the ratio of W to S is about 1:1.

The invention is suitable for the technical field of water meter shells, and particularly relates to a large-diameter multichannel ultrasonic water meter shell welding control method which comprises the steps that in response to welding operation, all meter shell data and historical meter shell data corresponding to all to-be-welded meter shells are obtained; performing watchcase similarity matching on the watchcase data and historical watchcase data to obtain watchcase matching result data; wherein the watchcase matching result data is used for indicating the similarity between the type of the to-be-welded watchcase and the type of a historical watchcase, and the similarity between the model of the to-be-welded watchcase and the model of the historical watchcase; generating welding scheme data according to the case matching result data; the welding scheme comprises a segmented welding process; according to the large-caliber multichannel ultrasonic water meter shell welding control method, thermal cycle superposition caused by welding can be reduced, and the situations of local sound velocity sudden change and sound channel geometric detuning of materials can be prevented.

A compact and small size multichannel collimator for neutrons with energies up to 50 keV is provided. The collimator has a multichannel structure composed of collimating channels (in air, vacuum or in the non-interacting atmosphere of Helium-4) alternating with “full” channels made with absorbent materials for slow neutrons. The geometry of the individual collimating and absorbing channels can be arbitrary. The geometry with channels of square section, such as to create a perfect checkerboard, is preferred from the point of view of ease of construction.