33 results about "Negative element" patented technology

The invention discloses a rapid sparse reconstruction method for exciting tomography fluorescence imaging (TFI), which comprises the following steps of: representing a diffusion equation into a linear equation by using a finite element theory; establishing a linear relation between unknown fluorescent light source distribution and boundary measuring data; calculating a surplus correlation vector to obtain the most relevant element set; merging the most relevant element set and a current support set to generate a new support set; dividing the discrete imaging space into an allowed area and a prohibited area by using the support set, and establishing a linear relation between surface fluorescence data and the allowed area; and substituting 0 for a negative element in a finally obtained solution vector. Heterogeneous characteristics of biological tissues are fully considered on the basis of a diffusion approximation model. In the process of reconstructing a light source, on the basis of sparse constraint of L1 norm, by regarding a TFI problem as a compressed sensing problem and positioning the light source by using a support set-based reconstruction method, the over-smooth phenomenonof a reconstruction result is effectively avoided, and the accuracy of TFI imaging is improved.

The invention discloses an RGB reconstruction-based method for identifying flame/smoke after forest image cutting, relates to an RGB reconstruction-based technology for identifying flame/smoke after forest image cutting, and aims to solve the problems of low system adaptability and high misjudgment rate of an existing flame/smoke identification method. The method comprises the steps of destroying a background region to the maximum extent based on different values of three RGB components of a flame/smoke region and the background region, thereby continuously shrinking a target region; in the process of shrinking the target region, only considering regions with most remarkable features, namely, connected regions conforming to the features and having maximum areas, and deleting small regions possibly causing misjudgment; and after corrected grayscale formula processing of flame features is enhanced, performing filtering, cutting, corrosion and expansion, and judging whether the region is a suspected smoke or flame region according to a proportion of non negative elements. The method is applied to an occasion for identifying flame/smoke in forest fire prevention.

The invention discloses a shaped lithium-manganese soft package battery and a manufacturing method thereof. The manufacturing method comprises the following steps: (a) punching a large positive plate into a shaped positive plate; (b) punching a lithium strip into a shaped negative plate; (c) welding a positive tab and bonding a negative tab; (d) carrying out bending and adhesive-tape terminating on a diaphragm, the shaped positive plate and the shaped negative plate on the connected part of shaped negative element sheets and the connected part of the shaped positive element sheets in a winding manner to form a shaped battery core; (e) putting the shaped battery core into a shaped aluminum-plastic housing and carrying out primary sealing and electrolyte injection; and (f) carrying out secondary sealing to obtain the shaped battery. The shaped battery is customized according to the shape of a battery compartment of an electrical appliance; an effective space of the battery compartment is fully utilized; and the battery capacity is maximized, so that the service lifetime of the electrical appliance is prolonged.

The invention discloses a short gap gas discharge numerical simulation method based on a time-domain spectral element method. The method comprises the following steps of establishing a structure modelof short gap gas, and conducting discretization to obtain the structural information of the model; using a GLL basis function based on the spectral element method for discretization, conducting a Galerkin test, and obtaining an expression of a high-order scheme; for a stiffness matrix, eliminating negative elements outside diagonal lines to obtain an expression of a lower-order scheme; conductingsubtraction on the expressions of the high-order and low-order schemes to obtain original back-diffusion flux and prelimit the original back-diffusion flux; calculating correction factors, obtaininglimited back-diffusion flux at last, adding the limited back-diffusion flux to the expression of the lower-order scheme, conducting time discretization in a multi-step backward difference format, using Newton iteration in each time step for solution, obtaining the electron density and ion density of the gas, calculating an electric field, and updating transport parameters. By means of the method,unconditional stability in time can be achieved, the calculation precision is high, and the simulation effect is good.

The invention provides a method for structuring a quasi-cyclic low-density parity check (QC-LDPC) code based on extrinsic message degree (EMD), comprising the following steps: determining parameters of an encoding matrix; structuring an index matrix M (H) of a parity check matrix of the QC-LDPC code; using the parity check matrix of the QC-LDPC code to initialize the index matrix M (H) based on approximate cycle EMD (ACE) algorithm; and assigning a cyclic shift value forming maximum ring length and extrinsic connectivity to each non-negative elements of the index matrix. By using the method provided by the invention, generated codes can be increased to correspond to the minimum stopping set in an ambigram, thus obtaining good error code correcting performance.

Systems configured to provide illumination of a specimen during inspection are provided. One system includes catoptric elements configured to direct light from a light source to a line across the specimen at an oblique angle of incidence. The catoptric elements include positive and negative elements configured such that pupil distortions of the positive and negative elements are substantially canceled. Another system includes a dioptric element and a catoptric element. The dioptric element and the catoptric element are configured to direct light from a light source to a line across the specimen at an oblique angle of incidence. The dioptric and catoptric elements are also configured such that pupil distortions of the dioptric and catoptric elements are substantially canceled.

The invention discloses a method for mining positive and negative sequence rules, belonging to the field of sequence rule mining. The technical problem to be solved is how to mine negative sequence rules to comprehensively reflect the relationship between the purchasing behavior of customers and purchasing commodities. The method comprises the following steps: mining a sequence database to obtaina positive and negative sequence pattern, wherein the positive and negative sequence pattern comprises a positive sequence pattern and a negative sequence pattern; generating positive and negative sequence rules by the positive and negative sequence patterns, wherein the positive and negative sequence rules comprise a positive sequence rule and a negative sequence rule, and both the front key andthe back key of the negative sequence rule can contain negative elements; based on the support degree, correlation and confidence degree of the sequence rules, each of the above sequence rules being selected in turn to obtain the positive and negative sequence rules that meet the user-defined requirements. The method not only reflects the purchase order of goods in the purchase behavior of customers, but also reflects the relationship between the negative correlation and the positive correlation of goods in each purchase behavior.

The invention relates to a genome targeted modification method. The genome targeted modification method is based on a multi-element positive and negative vector knock-in strategy and combined with a genome fixed-point modification technology to knock a positive and negative vector into atarget gene. The vector comprises a positive element and a negative element. The positive element comprises a gene coding sequence which can restore the expression the target gene, thus the function of the gene cannot be damaged, the negative element is mainly the element which destroys the function of an endogenous gene, meanwhile, an exogenous DNA sequence can be designed according to different purposes, and thus a variety of effects of fluorescent labeling and transformation, precise gene mutation, generescue and the like are achieved.

The invention discloses high-voltage electrolyte containing a novel additive. The high-voltage electrolyte is prepared from the following raw materials in percentage by mass: lithium salt, 85 to 95 percent of organic solvents, 2 to 8 percent of additives A and 5 to 8 percent of additives B. The high-voltage electrolyte containing the novel additive has the advantages that dibenzothiophene sulfonecontaining sulfur elements is used as a high-voltage additive of the lithium-ion electrolyte; the battery interface resistance is improved; the high-voltage performance of a lithium-ion battery is improved; the negative element material can be effectively coated by ethyl ester sulfate; the room temperature cycle performance under high voltage is greatly improved.

A vehicle charger has a hollow insulating housing which defines an opening at a front wall thereof and a recess at a lateral wall. A printed circuit board is fixedly received in the insulating housing. A positive element is mounted in the insulating housing and electrically connected with the printed circuit board. The positive element has a contact portion which passes through the opening and stretches outside the insulating housing. A negative element assembled in the insulating housing and electrically connected with the printed circuit board has an elastic portion protruding out of the recess partially. A holding frame of U shape has a base portion and two facing connecting arms respectively extending from both ends of the base portion. The connecting arms are pivotally mounted to two substantial opposite portions of the lateral wall biased from the recess.

A first embodiment is a lens system having a plurality of refractive and reflective spherical elements that work as a magnifier to produce a distortion free, less than 1%, image with optical correction over a wide field of view. The system has at least one concave reflecting surface, and at least three convex refracting surfaces with the sign of the radius of one of the convex refracting surfaces being opposite of the sign of the radius of remaining two convex refracting surfaces. A second embodiment is a lens having a concave reflecting element which is on a substrate that is a negative lens by transmission with an index of refraction between 1.6<nd>2.0 and a dispersion 49<νd>15. This is used in combination with at least 3 positive refracting surfaces with less dispersive power than the negative element and with the sign of the radius of one of the positive elements being opposite from the sign of the radius of the remaining positive elements.

The present invention relates to an improvement-based lower approximation non-negative matrix antipode geometric estimation method, relates to a computer vision technology, and provides the improvement-based lower approximation non-negative matrix antipode geometric estimation method along with outlier and model hypothesis pruning techniques. The method comprises the steps of firstly using a mismatching pruning technology for analyzing the relation between the matching pairs and eliminating the influence of the outliers (the mismatching points); then selecting a meaningful model hypothesis byusing a model hypothesis pruning technique; and then introducing a spatial constraint item (the spatially adjacent data points are more likely to belong to the same model hypothesis) and a sparse constraint item (the sparse non-negative elements can better reflect the consistent characteristics of the data points on the model) to a lower approximation non-negative matrix; and finally, solving theu and v of the lower approximation non-negative matrix by using an alternating iteration method, and extracting a multi-structure model from u.

The invention discloses a catalyst for non-carrier high-activity high-selectivity ammoxidation preparation of 2,6-dichlorobenzonitrile, wherein the catalyst has a composition of VaCrbMcOx, M is one selected from Fe, Al, W, Ti, Mo, Co and the like, a is 1, b is 0.1-0.9, c is 0.1-0.9, b+c is 1, and based on the value of x, the algebraic sum of the valence of the positive and negative elements in thecatalyst is zero. According to the present invention, by using the hydrothermal synthesis, the uniform dispersion of the active species of the catalyst is promoted; and the catalyst is prepared by using the hydrothermal method, the calcination decomposition process does not exist, the disadvantages of non-uniform active substance and requirement of high-temperature calcination decomposition of the impregnation method are avoided, and the yield and the selectivity of the catalytic product are not reduced.