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Operating modal parameter identification method for principal component analysis on basis of wavelet threshold denoising

The invention relates to an operating modal parameter identification method for principal component analysis on basis of wavelet threshold denoising. Measurement noise in vibration response signals of a small damping mechanical structure can be effectively filtered out, the operating mode (a modal inherent frequency and modal vibration shape) of a system can be identified, operating modes (modal inherent frequency and modal vibration shapes) with small contribution amount in the response signal can be even identified, and a PCA modal parameter identification algorithm and physical significance interpretation and certification are endowed. The method is applied to three-dimensional operating modal parameter identification as well as equipment fault diagnosis and health condition monitoring. The invention further relates to an operating modal parameter analysis meter based on the method. Multiple vibrating sensors are arranged on key points of the mechanical structure, operating modal parameter identification is carried out on the vibration response signals obtained through measurement, changes of characteristics of the system structure can be understood, and the operating modal parameter analysis meter can be applied to fault diagnosis and health condition monitoring of large-scale project structures.
Owner:HUAQIAO UNIVERSITY

Novel-class standard online education platform

The invention discloses a novel-standard sign online education platform. The online education platform realizes local or foreign dissemination of teaching information by the Internet, and comprises an interactive education server, a portal management center system and a demonstration center system, wherein the portal management center system and the demonstration center system are both connected with the interactive education server by the Internet; the Internet is also connected with a client terminal system; the client terminal system comprises a terminal server, a teacher terminal, student terminals and parent terminals, and is connected with the teacher terminal, the student terminals and the parent terminals respectively; the portal management center system comprises built-in functional modules for online providing related statistical analytical information and personalized information for a teacher, students and parents; and the demonstration center system controls the normal running of each piece of projection display equipment and demonstrates information shared by the education platform. The novel-class sign online education platform maximally utilizes high-quality educational resources, and effectively improves the teaching efficiency by an Internet technology.
Owner:SHANGHAI XUEZHOU INFORMATION TECH

Memory allocation processing method and device

InactiveCN107153618AReduce memory fragmentationImprove space utilizationMemory systemsOptimization systemMemory block
The embodiment of the application discloses a memory allocation processing method and device. The method comprises the steps that memory application information is obtained, and whether or not the applied memory is less than the maximum allocable memory of the memory blocks in the established memory pool is judged; when it is determined that the memory application is greater than the maximum allocable memory, according to the recorded large block of memory information in the data header of the memory block, the memory is allocated from the large block of memory to the application memory; otherwise, whether or not the application memory is greater than the free memory of current memory block is judged, when it is determined that the application memory is less than the free memory of current memory block, whether or not the current remaining space of current memory block meets the needs for the application memory is judged; if the current remaining space of current memory block meets the demand by the application memory, the memory is allocated from the current remaining space of current block memory block to the application memory. By the method and device, the time spent for memory allocation can be reduced, the memory utilization rate of a system is increased, and memory allocation efficiency of the system is optimized.
Owner:ADVANCED NEW TECH CO LTD

Regenerated permeable concrete material prepared by using all components of construction waste and preparation method thereof

The invention discloses a regenerated permeable concrete material prepared by using all components of construction waste and a preparation method thereof. The regenerated permeable concrete material is divided into a concrete base and a concrete facing. The method comprises the following steps: performing crushing and separation on construction waste to obtain construction waste coarse aggregate, construction waste fine powder and construction waste fine aggregate, preparing the concrete facing from the construction waste coarse aggregate and construction waste fine powder, and preparing the concrete base from the construction waste fine aggregate. The method can utilize all the components of the construction waste, and the utilization ratio is 100%. The prepared regenerated permeable concrete has the advantages of favorable permeation coefficient, favorable acoustical absorption coefficient and higher compression strength. The permeable system prepared from the regenerated permeable concrete material can satisfy the national standard on construction of sponge cities. The manufacturing cost is greatly lowered. The regenerated permeable concrete can be widely used in municipal construction.
Owner:WUHAN UNIV OF TECH

Detection method for rapid change in multi-source navigation electronic map vector road network

The invention discloses a detection method for rapid change in a multi-source navigation electronic map vector road network. The detection method comprises the following steps: I. reading two groups of road networks to be matched, wherein one group is marked as a reference road network and the other group is marked as a target road network, acquiring topological relation between road network node and arc, and constructing a spatial index of node elements; II. for each road node in the reference road network, searching candidate matching node from the target road network, determining matching relation of the road node, and determining corresponding relation of road arcs by calculating an included angle cosine matrix; III. depending on the obtained node matching relation and arc corresponding relation, finally obtaining possible m-to-n matching relation between the road arcs, wherein if the matching relation can exist, both m and n are not changed; and IV. on the basis of result of the determined road arc matching relation, further deducing and judging possible matching relation. Through the detection method disclosed by the invention, a matching result with relatively high accuracy rate is obtained, and efficiency is comparatively high as well.
Owner:NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER

Device and method for improving motion guiding efficiency

The invention provides a device and method for improving the motion guiding efficiency. The device comprises a motion capture device used for capturing actions of a test object to obtain bone parameters, a surface electromyography device used for capturing electromyographic signals when the test object performs actions, a comprehensive processor used for receiving and carrying out time domain synchronizing on the bone parameters and the electromyographic signals of the test object and matching and comparing the bone parameters and the electromyographic signals of the test object with motion process information of a demonstrator, and a head-wearing type multimedia device for receiving a matching and comparing result output by the comprehensive processor and presenting the result to the test object, wherein the motion process information of the demonstrator at least comprises bone parameters and electromyographic signals when the demonstrator performs actions. By utilization of the internal relation of a human body narrow-sense motion system, the motion guiding information can be rapidly and visually understood and applied by users, and barriers of motion guidance caused by human body stature differences can be overcome. The device and method for improving the motion guiding efficiency have the actively promoting function for popularizing projects such as shadowboxing.
Owner:凌亚

Anti-fatigue anti-aging compound capsules containing sea cucumber peptides and oyster peptides, and preparation method of capsules

The invention relates to anti-fatigue anti-aging compound capsules containing sea cucumber peptides and oyster peptides. The components in each 500mg of capsule contents are as follows: 200-300mg of sea cucumber peptides, 100-200mg of oyster peptides, 50-100mg of maca extractive, 50-100mg of polygonatum sibiricum rhizome extractive, and 5-10mg of astaxanthin. A preparation method comprises weighing raw materials according to proportioning, conducting uniform mixing, conducting sieving with a 100-mesh sieve to obtain mixed powder, and then filling capsule shells with the obtained compound powder by adopting a conventional capsule filling process so as to obtain the compound capsules. The compound capsules prepared by the invention can prolong the weight-bearing swimming time of mice, reducethe blood lactic acid level of the mice after exercise, and increase hepatic glycogen reserve of the mice; and the compound capsules have obvious protection effect on the damage caused by oxidation in the mice of a rapid aging model. Through human test-meal trials, the compound capsules can obviously relieve fatigue symptoms including fatigue, hypodynamia, soreness of waists and legs, and sexualhypofunction. The trials indicate that the compound capsules have good anti-fatigue and anti-aging effects, and have no side effect on human bodies, and can be taken for a long term.
Owner:陈石良

Mechanical producing well working condition comprehensive diagnostic analysis method and device

ActiveCN103510940AMeet the needs of production macro managementImprove efficiencySurveyWaxSource Data Verification
The invention discloses a mechanical producing well working condition comprehensive diagnostic analysis method and device. The method includes the steps that an oil well inflow dynamic curve and a lifting pump characteristic curve are utilized to draw a mechanical producing well working condition comprehensive diagnostic diagram; the positions of single wells are determined in the mechanical producing well working condition comprehensive diagnostic diagram; if the single wells in the mechanical producing well working condition comprehensive diagnostic diagram are located at one of the following zones of a parameter too large or pump lowering too shallow zone, a breakage leakage oil pressure too large wax blocking zone and a casing pressure too large or data verification zone, corresponding identification is set for the single wells in the mechanical producing well working condition comprehensive diagnostic diagram according to the working conditions of the single wells, and the mechanical producing well working condition comprehensive diagnostic diagram comprises the following five zones of a working reasonable zone, the parameter too large or pump lowering too shallow zone, a parameter too small zone, the breakage leakage oil pressure too large wax blocking zone and the casing pressure too large or data verification zone. By the adoption of the method, the system working conditions of mechanical producing wells can be comprehensively, rapidly, accurately and visually evaluated.
Owner:PETROCHINA CO LTD

Compound enzyme used for methane gas fermentation and capable of supplementing trace elements

The invention discloses compound enzyme used for methane gas fermentation and capable of supplementing trace elements, which is used for quickly decomposing raw materials in methane gas fermentation to supplement the trace elements so as to quicken gas production and increase gas yield. The compound enzyme comprises an enzyme preparation part and a trace element part, wherein the enzyme preparation part is prepared by compounding the following solid monomeric enzyme raw materials in percentage by weight: 20 to 30 percent of 20,000u/g xylanase, 20 to 30 percent of 20,000u/g cellulose, 5 to 10 percent of 1,500u/g lipase, 5 to 10 percent of 10,000u/g pectinase, 5 to 10 percent of 30,000u/g saccharifying enzyme and 5 to 10 percent of 10,000u/g glucanase; the trace element part is prepared from the following raw materials in percentage by weight: 10 to 15 percent of zinc sulfate, 20 to 30 percent of powdered rock phosphate, 10 to 20 percent of steelmaking slag, 12 to 16 percent of calcium carbonate, 20 to 25 percent of stove ash, 5 to 10 percent of active carbon and 4 to 8 percent of nonionic surfactant; and a weight ratio of the enzyme preparation part to the trace element part is 1:(1-2). The compound enzyme can produce gas quickly, increase gas yield, prolong fermentation time, reduce residual energy and improve utilization rate of the raw materials.
Owner:枣庄市杰诺生物酶有限公司
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