121results about How to "Good periodicity" patented technology

Various implementations of the invention provide techniques and supporting systems that facilitate real-time or near-real-time ultrasound tracking for the purpose of calculating changes in anatomical features during a medical procedure. More specifically, anatomical features within a patient undergoing a medical procedure are tracked by obtaining temporally-distinct three dimensional ultrasound images that include the feature of interest and obtaining a targeted subset of ultrasound images focused on the feature. Based on the targeted subset of ultrasound images, a displacement of the feature is determined and image parameters used to obtain the targeted subset of ultrasound images are adjusted based on the displacement. This results in a time-based sequence of three dimensional images and targeted ultrasound images of the feature that identify changes in the position, size, location, and/or shape of the feature.

Various implementations of the invention provide techniques and supporting systems that facilitate real-time or near-real-time ultrasound tracking for the purpose of calculating changes in anatomical features during a medical procedure. More specifically, anatomical features within a patient undergoing a medical procedure are tracked by obtaining temporally-distinct three dimensional ultrasound images that include the feature of interest and obtaining a targeted subset of ultrasound images focused on the feature. Based on the targeted subset of ultrasound images, a displacement of the feature is determined and image parameters used to obtain the targeted subset of ultrasound images are adjusted based on the displacement. This results in a time-based sequence of three dimensional images and targeted ultrasound images of the feature that identify changes in the position, size, location, and/or shape of the feature.

The invention provides a gas compressor plane cascade experimental system with a suction baffle structure. The gas compressor plane cascade experimental system comprises a suction device and a plane cascade experimental device. The plane cascade experimental device comprises a left end plate, a right end plate, an upper baffle, a plurality of experimental blades and a lower baffle, wherein the upper baffle is arranged between the left end plate and the right end plate, and the multiple experimental blades are distributed at intervals. The upper baffle and the lower baffle are connected between the left end plate and the right end plate through fixing shafts. The upper baffle is provided with suction holes. Left end plate suction holes are formed in the left end plate, and right end plate suction holes are formed in the right end plate. The suction holes are connected with a vacuum pump through a pipeline. A three-hole probe 1 is arranged between the left end plate and the right end plate. In the experimental process, the upper baffle and the lower baffle are adjusted so that a cascade can be good in periodicity, the boundary layer of incoming flow is sucked through the left end plate suction holes and the right end plate suction holes, the influence area of the boundary layer is reduced, and uniform incoming flow is achieved. The gas compressor plane cascade experimental system with the suction baffle structure is an effective path for exploring improvement of the performance of a gas compressor, the influence of the boundary layer of the incoming flow is reduced, and meanwhile, the periodicity of the plane cascade is improved.

The invention discloses a rolling bearing early composite fault feature extraction method based on progressive VMD. The method comprises the steps of 1, installing an acceleration sensor near a rolling bearing to collect vibration signals during bearing operation; 2, decomposing the acquired vibration signal by using a progressive VMD to obtain a series of decomposed modes; 3, screening the modesobtained after decomposition by using a dual screening criterion based on kurtosis and an energy fluctuation factor to determine a fault mode, and realizing reconstruction of the fault mode; 4, initializing the range and the search step length of the balance parameter alpha, repeating the step 2 and the step 3 for different alpha values, calculating the EFF value of the reconstruction mode, the maximum EFF value corresponding to the optimal alpha value, and then determining the reconstruction mode under the optimal alpha value; and 5, demodulating the reconstructed mode by using TEO to obtaina TEO spectrum, and obtaining a diagnosis result in combination with the bearing related fault characteristic frequency. On the basis of an EEMD recursion idea, the invention provides a progressive decomposition VMD method.

A signal identifying device which can identify an input signal easily includes a pitch extracting (4Y) for extracting a pitch component of the input signal (S1), and energy calculating unit (4X) for calculating an energy component of the input signal, and identifying unit (4Z) for executing a predetermined operation to the pitch component and the energy component and for identifying whether the input signal is a voice signal or music signal. The voice signal generally has the characteristics evident in energy, and has strong periodicity (i.e., pitch component) comparing compared to the music signal.

The invention discloses a method for preparing a pyramid-shaped composite three-dimensional lattice sandwich structure. The method for preparing the pyramid-shaped composite three-dimensional lattice sandwich structure comprises the steps that 1, a base provided with five tenons is prepared; 2, a hollow sandwich pipe is prepared; 3, lattice skin is prepared; 4, the base and the sandwich pipe are assembled into a lattice core of a sandwich structure; and 5, the skin and the lattice core are assembled into the lattice sandwich structure. The method for preparing the pyramid-shaped composite three-dimensional lattice sandwich structure has the advantages that the automation degree is high, and the production cycle is short; in addition, the pyramid-shaped composite three-dimensional lattice sandwich structure prepared through the method is high in structural strength and complete in mechanical property; the periodicity of pyramid-shaped lattice cell elements is good, and the application range is wide.

The invention discloses a Prophet-ARMA-based method for predicting outpatient visits in hospitals. The method comprises the following steps: 1, acquiring the outpatient data of the historical period adjacent to the period to be measured and generating the outpatient data set of each type of outpatient; 2, respectively inputting each outpatient data set into a Prophet model of each type of outpatient service to obtain first prediction data and fitting data; 3, calculating a residual sequence of each type of outpatient service; 4, respectively judging whether the residual sequence of each type of outpatient service is a pure random sequence, if not, inputting the residual sequence into the correspond ARMA model to obtain the second prediction data, and then executing the step 5; if yes, performing the step 6; 5, respectively adding the first prediction data and the second prediction data of the same type of outpatient clinics to obtain the prediction value of the amount of visit in the period to be tested; 6, taking the first prediction data as the prediction value of the attendance amount in the period to be measured. The invention combines Prophet and ARMA to improve the predictionaccuracy of the visiting quantity.

The invention discloses a method for constructing an organic liquid crystal molecule single-crystal micro-wire patterned array by a nanoimprint technology. The method is divided into two parts; one part is a preparation of an imprint template; the other part is a preparation of an imprint base; the preparation of the imprint template comprises the following steps: firstly, cleaning a SiO2/Si wafer base; secondly, carrying out positive photoresist photoetching and developing on the base to obtain an array pattern; thirdly, etching the photoetched SiO2/Si wafer base by a reactive ion etching machine; fourthly removing the photoresist and obtaining an uneven template periodically arranged; fifthly spinning perfluorinated resin on the SiO2/Si wafer base; and finally heating to finish the preparation of the imprint template; the preparation of the imprint base comprises the following steps: firstly, taking one cleaned SiO2/Si wafer; secondly, lifting an organic small molecule membrane from the base on a step-by-step precision lifting platform to finish the preparation of the imprint base; the imprint template covers the base; certain pressure is applied; the imprint template is heated to the melting points of organic small molecules; heating is stopped after the temperature is kept constant for 15 minutes; the imprint template is cooled to room temperature; and the base is taken out, so as to obtain the periodic large-area organic small-molecule single-crystal micro-wire patterned array.

The invention relates to a mechanical vibration signal feature extraction method based on combination of stochastic resonance and kernel principal component analysis. The method comprises the steps that firstly, the stochastic resonance method is applied for conducting pretreatment on rotor oscillation original signals measured by a sensor, the signal periodicity is improved, and the oscillation signal to noise ratio is improved; then, a time domain feature set is extracted for the pretreated output signals; then the kernel principal component analysis method is adopted for conducting nonlinear feature transformation for the extracted time domain feature set, and therefore the final needed feature set is obtained. The method is applied to feature extraction and failure diagnosis of simulated failure of an engine rotor, the result shows that the feature set extracted through the method is of linear independence, the number of dimensions is smaller, the separability is higher, the precision and efficiency of the failure diagnosis can be effectively improved, and application in engineering practice is facilitated.

This invention relates to communication field and provides a kind of method for real-time displaying the data of network managing foreground and background are inconsistent. Through defining each related data the journal information, whether the related data of foreground and background are consistent is detected by comparing the journal information corresponded to the said data. When the journal information is inconsistent, the detailed data will be further compared. This invention can achieve real-time and automatic effect.

The invention discloses a method for preparing bismuth nano wire array thermoelectric materials. The method is to take a high-purity BiCl3, glycerol and ammonia water solution as an electrodeposition solution, adopt electrochemical technology and utilize cyclic voltammetry to perform electrodeposition on an alumina template, and finally obtain the one-dimensional orderly Bi nano wire array thermoelectric materials with high thermoelectric conversion efficiency. The invention has simple preparation method and high filling rate; the maximum characteristic of the materials is that the materials can receive various forms of heat energy (including various types of radiant heat, solar energy, body temperature, heat generated in the system operation process, various types of waste heat and the like) from the environment and highly efficiently and directly convert the heat energy into electric energy which is then outputted; and due to the characteristics of the special high-density nano wire array structure, oxidation resistance, high temperature resistance, high field emission current density, low turn-on field, good emission stability and the like, the application of the materials to field emission microelectronic devices as cathode materials can be realized and the materials have wide commercial application prospect.

The invention discloses a method for constructing an organic micron linear array with a form board assisting in volatilization induced self-assemble. The method comprises the following steps that (1) a substrate is washed through cleaning fluid in an ultrasonic mode, then the substrate is immersed in the piranha solution and processed by an oxygen plasma, and the surface of the substrate is made to have strong wettability; (2) the form board is constructed on the substrate; (3) the micron linear array is grown on the form board, the pre-processed form board is inserted in the organic solution for growth, and through volatilization induced self-assemble, the large-area highly-aligned organic micron linear array is obtained. The method is of great significance to manufacturing of large-area high-performance photoelectron micro-nano devices based on organic optoelectronic materials and further achieving of micro-nano device integration.

The invention provides a single aligned carbon nano tube jet-printing arrangement method. The method comprises the steps that a substrate is modified with octadecyltrichlorosilane (OTS), so that the surface of the substrate has a hydrophobic property; precise control over the thin film position, the aligned density and patterning of aligned carbon nano tubes is achieved on the functional hydrophobic substrate through ink-jet printing, and a carbon nano tube thin film which is uniform in density and consistent in orientation and has different patterns is arranged. By means of the method, the carbon nano tube arrangement area of the size from several micrometers to the wafer level can be effectively controlled; the problems can be solved that in all existing arrangement methods, the arrangement position, the arrangement orientation, the arrangement density and the thin film array patterning of one-dimensional nano materials on the substrate cannot be efficiently and precisely controlled;the method can be widely used for preparing various high-performance photoelectric devices, logic circuits and functional thin films based on the carbon nano tubes, and the method also has a wide application prospect in the field of flexible wearable nano devices.

The invention discloses a laser-chemical preparation method of a monocrystal silicon substrate sub-micron pyramid structure, belonging to the field of crystalline silicon surface micro-structure preparation. The preparation method comprises the following steps: firstly, performing pretreatment on monocrystal silicon, and covering periodically close-packed microspheres on the surface of monocrystal silicon; performing irradiation by adopting a 248nm laser, wherein the single pulse energy density is 100-400mJ/cm<2>; performing certain treatment on a monocrystal silicon sample after irradiation, and removing the residual microspheres on the surface; after removal ends, dipping the monocrystal silicon sample into a sodium hydroxide aqueous solution containing ethanol under the environment that the water bath temperature is 70-80 DEG C, eroding for 10-30 seconds, taking out the monocrystal silicon sample, and washing by using deionized water to obtain a monocrystal silicon piece with a normal pyramid array. The laser-chemical preparation method disclosed by the invention exerts the laser controllability, can be used for rapidly and simply preparing the pyramid array with periodicity and uniformity, has high controllability in pyramid forming, can be used for adjusting the separation distance and morphology features of the pyramid array, also is low in raw material cost, and has relatively high practicability.

The invention discloses a data processing method and electronic equipment. The method comprises the following steps: obtaining a first group accelerated speed data on a first dimension, a second group accelerated speed data on a second dimension, and a third group accelerated speed data on a third dimension; respectively determining the extreme point data of each group in the first group accelerated speed data, the second group accelerated speed data and the third group accelerated speed data; processing the extreme point data to obtain three extreme value chains; selecting the extreme value chain which can satisfy the preset condition in the three extreme value chains as a target extreme value chain; and performing analysis on a peak valley state of the extreme point on the target extreme value chain to obtain the step-counting data.

The invention provides a periodic SiO2 flaky nano structure. The length of the periodic SiO2 flaky nano structure is 125-130 mu m, the width of the periodic SiO2 flaky nano structure is 65-70 mu m, the tail end of the periodic SiO2 flaky nano structure is provided with 4-5 sawteeth, the surface of the periodic SiO2 flaky nano structure is of a periodically distributed strip-shaped structure, and the distribution period of the strip-shaped structure is 2.6-3 mu m. The invention also provides a preparation method of the periodic SiO2 flaky nano structure. The periodic SiO2 flaky nano structure is prepared by utilizing a sol-gel method by taking a butterfly wing as a template and tetraethoxysilane as a raw material. The periodic SiO2 flaky nano structure can be subjected to large-scale preparation on a glass slide, has the characteristics of good periodicity and regular topography, and can be applied to special gratings or other optical devices and the like in the field of optics.

A method for preparing a photonic crystal slab waveguides is disclosed, wherein the photonic crystal slab waveguides are prepared by combining near-field phase-shifting contact lithography (NFPSCL) with interference lithography (IL). Conventional methods used for preparing the photonic crystal slab waveguides, such as electron beam lithography or direct laser writing, are time consuming. In contrast, the present method allows rapid production of many photonic crystal slab waveguides over a large area composed of microstructures.

The invention discloses a chaos based Enigma encryption method, which relates to an encryption system and is used for data and information protection. By using the method disclosed by the invention, the cyclicity problem of Enigma is improved, a cycle is expanded through chaotic mapping, and each input value mapped in the process of plain-text encryption is determined by a state value of the chaotic mapping every time, so that even in a long plain text, a periodic characteristic is difficult to occur; the distribution of passwords is better, in the Enigma encryption method disclosed by the invention, through combining with nonlinear chaotic mapping, an encryption process is completely non-linearized, so that the randomness of generated ciphertexts is better; because each ciphertext is associated with a front encrypted plain text, a slightest modification on the plain text causes a great change of the ciphertext, therefore, the method has a good avalanche effect, and can be widely applied to various mediums such as texts and images and the like; and obtained encryption results have good expressions on encryption effect and histograms thereof, adjacent pixel correlation analysis, differential attack analysis and text encryption.