154 results about "Field methods" patented technology

A method of routing data from a client through one or more load-balancing nodes to a selected load-balanced server among a plurality of servers in a network involves: receiving, at a last load balancing node associated with a selected server among the plurality of servers, a first packet of a server reply to a request from the client; setting a first flag value in the first packet of the server reply; storing one or more identifiers of ingress interfaces on which the packet arrives, in a send path list for server load balancing, as the first packet of the server reply is routed from the last load balancing node to the client using hop-by-hop decisions; receiving one or more subsequent packets of the client request; setting a second flag value in each of the subsequent packets; and forwarding the subsequent packets to the selected server only on a route that is defined by the send path list and without hop-by-hop routing decisions. As a result, packet flows are rapidly routed from the same client to the same server without time-consuming hop-by-hop routing decisions or repeated load-balancing decisions.

In general, the purpose of the probe system is to provide improved rapid field methods using re-designed direct push technology (DPT) and “push-pull testing” concepts to evaluate in situ chemical, biochemical, surfactant, adsorptive media, and leaching and fixation remediation technologies for hazardous subsurface contaminant(s). The probe system and methods described here when applied to a hazardous waste site being considered for in situ remediation of contaminants (organic or inorganic) by the listed treatment technologies will yield information that greatly reduces the uncertainty with regards to treatment effectiveness for the in situ soil, groundwater, and contaminant(s) conditions affecting dosage requirements and reaction rate(s) for various reactants. The probe system described here is multi-purpose in that it was designed: 1) to measure the relative permeability of the subsurface soil and groundwater to a liquid or gas ejectant, 2) to recover soil gas, soil, or groundwater samples for contaminant analyses, 3) to measure the chemical dosage and reaction, dissolution, adsorption, desorption, leaching, or fixation rate of a reactant such as a chemical or biochemical oxidant, metallic or bimetallic dehalogenating agent, surfactant or emulsifier solution, adsorbent media regenerant, leaching or fixation reagent that is injected into the matrix and withdrawn during a push-pull test, 4) to perform combinations of the above, 5) to measure the in situ adsorption capacity of adsorbent media and subsequently measure the effectiveness of regenerant(s) for the adsorbent media, and (6) to measure the effectiveness of a treated soil column for inorganic contaminant(s) leaching or fixation. In addition to being an in situ remedial alternatives evaluation tool, the probe system can be used as a reactant(s) delivery device after the specific remedial technology has been selected.

Method and system for address routing in a distributed computing system, such as a distributed computing system that uses PCI Express protocol to communicate over an I/O fabric. A destination identifier is provided to identify a physical or virtual host or end point. When a physical or virtual host or end point receives a PCI data packet it compares a list of source identifiers with destination identifiers to determine if a source identifier included in the transaction packet is associated with a destination identifier included in the transaction packet to determine if the transaction packet has a valid association. If the transaction packet has a valid association, it is routed to the target device. The present invention enables each host that attaches to PCI bridges or switches and shares a set of common PCI devices to have its own PCI 64-bit address space and enables the routing of PCI transaction packets between multiple hosts and adapters, through a PCI switched-fabric bus using a destination identifier.

The invention discloses a non-rigid heart image grading and registering method based on an optical flow field model, which belongs to the technical field of image processing. The method comprises the following steps of: obtaining an affine transformation coefficient through the scale invariant characteristic vectors of two images, and obtained a rough registration image through affine transformation; and obtaining bias transformation of the rough registration image by using an optical flow field method, and interpolating to obtain a fine registration image. In the non-rigid heart image grading and registering method, an SIFT (Scale Invariant Feature Transform) characteristic method and an optical flow field method are complementary to each other, the SIFT characteristic is used for making preparations for increasing the converging speed of the optical flow field method, and the registration result is more accurate through the optical flow field method; and the characteristic details of a heart image are better kept, higher anti-noising capability and robustness are achieved, and an accurate registration result is obtained. Due to the adopted difference value method, a linear difference value and a central difference are combined, and final registration is realized by adopting a multi-resolution strategy in the method simultaneously.

In-situ methods and systems for determining bridge load ratings under ambient traffic are provided. These may include, for example, by installing one or more strain gauges on one or more bridge girders a batch of strain readings may be acquired from the one or more strain gauges. From the batch of strain readings, one or more strain time histories may be randomly sampled based, for example, on a girder peak strain. One or more vehicles may be randomly selected based on the one or more stored vehicle parameters by accessing a database with one or more stored vehicles and stored vehicle parameters. A bridge load rating model may be calibrated based on the one or more randomly sampled strain time histories and the randomly selected one or more vehicles for acquiring, in one embodiment, a bridge load rating distribution.

A reflected dark field structure includes a bottom plate, a support tube, a light unit, a diffuser structure, and a reflector unit that provides reflected dark field illumination, such that a gem held by the support tube and surrounded by the diffuser structure is illuminated and viewable through an aperture in the reflector unit. A method for imaging and analyzing a gem includes placing the gem onto a support tube where it is illuminated with dark field and reflected dark field illumination, and viewing the gem via an aperture located on a top reflector unit, which provides a top cover for the gem. Furthermore, a method and apparatus for obtaining images of a gem includes a dark field stage, a reflector unit, and an image-acquiring device, such that a gem placed in the dark field stage is illuminated, and such that the reflector unit covers the dark field stage and provides reflected dark field illumination, and such that the image-acquiring device is directed towards an aperture in the reflector unit.

The invention relates to a multi-scale convolutional neural network-based heavy rainfall and thunderstorm prediction method and system. The method of the invention includes the following steps that: original radar echo data are acquired; the original radar echo data are preprocessed, so that radar echo time series images can be obtained; any three frames of radar echo time series images which aregenerated consecutively are selected, a radar echo convolutional neural network is constructed, and the next frame of radar echo image can be inferred; and radar echo change within one minute is inferred by means of an optical flow field method and a linear interpolation method. With the method adopted, thunderstorm weather in one hour can be predicted, and the space range of thunderstorm weatherprediction can be narrowed to be a range within 1 km.

The invention provides a target field method for design shimming coils for cylindrical Halbach magnet (commonly known as a magic ring magnet). All orders of shimming rings which are designed according to the invention are respectively fixed on all coaxial cylindrical surfaces on the inner side of the permanent magnet. Closed loops as shown in Drawings 3 to 10 are cut into 'open loops' at appropriate positions, and the close open loops are sequentially and serially connected and an order of shimming coil is formed. Every order of shimming coil is electrified and generate precise corresponding order of harmonic magnetic field in an interested area in the center of the magnet. When in design, the value of a stream function meets the condition that the magnetic fields of the coils do not exceed a target harmonic field for a certain threshold, the power consumption functions of the coils are minimum, and the projection of the isolines of the stream function realizes the distribution of leads. After being fed with appropriate reversing current, all orders of harmonic shimming coils designed according to the invention can precisely offset harmful harmonic components in the magnetic fields, so that the purpose of shimming horizontal magnetic fields Bx of the magic ring permanent magnet is achieved, and simultaneously, the cylindrical Halbach magnet shimming coils have the characteristics that the power consumption of the coils is low and the shimming efficiency is high.

The invention provides a phase-field method-based microstructure evolution simulation method in a welding process in a transient state. The phase-field method-based microstructure evolution simulation method in the welding process in the transient state comprises the following steps of simplifying conditions and initializing a model, building the model according to parameters of a solidification process of a welding pool; building a macro transient heat transfer and growth rate model, wherein the welding pool is regarded to be formed by combining two semi-elliptical spheres, one semi-elliptical sphere is in a molten state and the other semi-elliptical sphere is in a solidified state in the welding process; building the macro transient heat transfer and growth rate model on the basis of hypotheses; building a microstructure evolution model and building a phase-field model of simulating microstructure evolution of the welding pool on the basis of the Ginzburg-Landau theory; and carrying out macro-micro coupling calculation, introducing a transient temperature gradient and a dendrite growth rate into the model, calculating a macro-micro coupled phase-field model and obtaining a microstructure evolution simulation result of the welding pool.

Method of estimating the recovery factor for the volume drained by at least one producing gas well that penetrates a tight gas reservoir or a coal bed methane reservoir, by (a) calibrating changes in the isotopic composition of at least one component of the gas that is produced from the gas well with increasing recovery factor, (b) obtaining a sample of produced gas from the producing gas well and analyzing the sample to obtain the isotopic composition of the component of the produced gas and (c) using the calibration obtained in step (a) and the isotopic composition determined in step (b) to estimate the recovery factor for the volume drained by the gas well. The estimate of the recovery factor determined in step (c) and the cumulative volume of gas produced from the gas well is used to determine the volume drained by the gas well.

The invention discloses a simplified straw-returning-to-field method applicable to clay paddy fields. The technique of wheat harvesting, straw smashing and directly returning to field, the technique of more nitrogen application for regulating carbon nitrogen ratio of straw, the technique of applying straw decomposition additives for quickening straw decomposition and degradation, the cultivation technique of subsoiling, burying and pressing the straw and improving the poor soil profile pattern of clay, the technique of field steeping, waterlogged compost and soil acidity regulation, the technique of soil preparation and optimum balanced rice fertilization and the like are integrated.

The invention discloses a gradient coil design method in a nuclear magnetic resonance system. The method comprises the following steps of: establishing a mathematical relation between a field expansion harmonic component and a cylindrical surface current distribution harmonic component under a spherical coordinate system based on a current distribution harmonic component coefficient capable of generating a specific target field through solving; combining the traditional harmonic method with a target field method; and introducing a simulated annealing algorithm to optimize and obtain the global optimum current distribution. The gradient coil design method can be used for designing a self-shielding gradient coil with cylindrical surface current distribution and optionally restraining the coil length, and ensures excellent linearity while the higher coil efficiency is achieved through comprehensively considering a plurality of design indexes. Since the gradient coil design method is optimized by utilizing a global search algorithm-simulated annealing algorithm, a global optimum design result is ensured. Meanwhile the position information of the actual distribution of a current lead is directly output by the design result, therefore, the engineering processing and manufacturing are facilitated.

This invention provides a method for protein structure alignment. More particularly, the present invention provides a method for identification, classification and prediction of protein structures. The present invention involves two key ingredients. First, an energy or cost function formulation of the problem simultaneously in terms of binary (Potts) assignment variables and real-valued atomic coordinates. Second, a minimization of the energy or cost function by an iterative method, where in each iteration (1) a mean field method is employed for the assignment variables and (2) exact rotation and/or translation of atomic coordinates is performed, weighted with the corresponding assignment variables.

An MRI RF coil that is optimized for SENSE imaging is used in a method where the surface current density distribution on a coil former was calculated to maximize the SNR_sense within a volume of interest. An analytic relationship was formulated between the SNR_sense and surface current density on the coil former. The SNR at pixel ρ in a SENSE-MR image, SNR_sense,ρ, is inversely proportional to the g-factor The g-factor was formulated in terms of the B1 distribution of the coils. By specifying the geometry of the desired coil former and using a finite element mesh, the surface current distribution was calculated to maximize the SNR_sense, by minimizing (1/SNR_sense) in the volume of interest using a least squares procedure. A simple two-coil array was tested and phantom images were collected. The results show that the new coil design method yielded better uniformity and SNR compared to standard coils.

The invention relates to a flat field method for an imaging interferometer. The optical axis of the flat field imaging interferometer is collimated to the center of the opening of the flat field light source, the interferometry image data output by the flat field imaging interferometer is acquired by an image acquisition card, and sent to the computer to processing, the flat field correction matrix is calculated, the flat field uncertainty is analyzed, and the flat field correction matrix is acquired. The invention solves the technical problem that the allsidedness and the effect of the correction are correspondingly poor in the technical background. The invention is mainly utilized on the flat field of an entire spatial modulation imaging interferometer to eliminate the system error, and the inconsistence of the response between pixels can be corrected at one-time. The invention is also suitable for the flat field of the imaging interferometer embarked on a plane or a satellite during the flying processing by utilizing the ground standard radiation field.

The invention discloses a ground measurement method for accuracy of a distance measurement sensor for rendezvous and docking of airships. The coordinate system of a distance measurement sensor body is visibly derived by using an electronic theodolite measurement system, and a plurality of kinds of the coordinate systems are converted by combining a controlling field method. The coordinate system of the distance measurement sensor body and the coordinate system of the controlling field are unified by using a high-precision ground measurement control network. Distance measurement is performed on a reflection target of the distance measurement sensor by using a high-precision total station. The data of the plurality of kinds of the coordinate systems is integrated according to existing measurement data so as to deduce the relative distance between the distance sensor and a target marker; and the relative distance is compared with the actual measurement result of the distance measurement sensor so as to obtain the measurement accuracy of the distance measurement sensor finally.

Driving circuit for plasma display device and a gray scale implementing method therefor are provided. The method includes the steps of (1) dividing total horizontal lines of one frame into XxY subframes according to a relative luminance ratio, (2) dividing each frame into X subfields and allotting Y different subframes to each subfield, and (3) supplying corresponding gray scale data while sequentially erasing each XxY horizontal lines during one horizontal period from the first horizontal electrode lines to the last Nth horizontal electrode lines, included in Y different subframes allotted to each subfield by repeatedly driving X subfields and scanning the same, thereby implementing a display picture of 2XxY gray scales. At least two scanning and sustaining drivers are provided, and one frame is divided into one or more subfields by the drivers, different subframes are allotted to each subfield and then X subfields are repeatedly driven. In other words, since a plurality of horizontal lines to be scanned at a time in a sub-frame method are separately scanned, the overall scanning frequency is decreased. Thus, gray scales exceeding 256 levels can be easily implemented under a stabilized system. Also, flickers caused by the sub-field method can be eliminated. Further, luminance and contrast of a display picture can be improved.

The present invention is directed to in situ methods for maintaining turbine assemblies. One such method includes: disposing a maintenance apparatus on the rotor; positioning the maintenance apparatus proximate to the damaged region by rotating the rotor; and repairing the damaged region by operating a repair tool disposed on the apparatus. Another method includes: disposing a maintenance apparatus on the stator; positioning the damaged region proximate to the maintenance apparatus by rotating the rotor; and repairing the damaged region by operating a repair tool disposed on the apparatus.

The invention relates to a quantitative detection method adopting metal magnetic memory, which is characterized in that a phase-field method for describing solid-state micro-structure evolution and micro-elastic properties is adopted, external stress of a ferromagnetic component, the geomagnetic field and energy diversity corresponding to internal stress concentration are considered comprehensively, and a quantitative relationship of the external stress, an internal magnetic source of the component and the stress concentration is established based on magnetic domain evolution and structural micro-elasticity. Meanwhile, a quantitative relationship of the magnetic source and a surface magnetic leakage field is established based on properties of a magnetic material around a stress concentration area. Therefore, the micro relationship and the macro relationship are effectively combined, and the interaction of the external stress, the magnetic source in the ferromagnetic component, the stress concentration in the component and the magnetic leakage field is established. When the properties of the material of the ferromagnetic component, the parameters of the macro material and the external stress are given, the magnetic intensity of the magnetic source in the ferromagnetic component and the characteristic stress of the stress concentration area can be determined quantitatively according to the measured signals of the magnetic leakage field.

The invention discloses a fluid-solid node two-phase flow modeling method used for achieving gravity-driven fluid-structure interaction heat transfer of two-phase flow without phase change. The method is characterized in that accurate calculation of a flow field is ignored, and the two-phase flow is processed according to a node thermal network thought. The method specifically comprises the steps that A, a liquid phase and a gas phase are abstracted into nodes with certain mass, volume and temperature; B, a gravity direction volume integral is used for calculating the interface between the two phases; C, a surface radiation heat transfer model is used for calculating the radiation heat flux density of a fluid-structure interaction wall; D, the temperature of the gas phase and the temperature of the liquid phase are calculated according to the heat convection heat flux density of the fluid-structure interaction wall; E, solid transient heat conduction is calculated according to the total heat flux density of the fluid-structure interaction wall. Targeting the fluid-structure interaction heat transfer process of the two-phase flow in a typical fuel tank, compared with a calculated result obtained through a Fluent business software phase field method, the calculated result obtained through the modeling method better reflects the influence of the phase interface on heat transfer, calculation efficiency is improved by one order of magnitude, and the engineering calculation demand is met.