34 results about "Irreversible process" patented technology

Shape memory alloy (SMA) actuating elements are commonly simpler and of lower mass than alternative actuator designs and may find particular application in the transportation industry. Such SMA-powered devices are usually reliable and long-lived but the phase transformations which occur in the SMA alloy and are responsible for its utility are not totally reversible. This irreversibility, a consequence of irrecoverable strain, may progressively degrade the long-term actuator performance as the irrecoverable strain accumulates over many operating cycles. Methods and devices for compensating for these effects and extending the useful cycle life of SMA actuators are described.

The current invention provides a method and apparatus, which uses symbol sequence techniques, temporal irreversibility, and/or cluster analysis to monitor the operating state of individual burner flames on a appropriate time scale. Both the method and apparatus of the present invention may be used optimize the performance of burner flames.

The invention relates to a terahertz-driven electronic pulse accelerating femtosecond electron diffraction device which comprises a femtosecond laser, a beam splitter, an ultraviolet laser pulse generator, a terahertz pulse generator, an electron gun, an electron focusing device, a sample room, an imaging device and a camera. After the femtosecond laser emitted by the femtosecond laser passes through the beam splitter, one beam of femtosecond laser enters the ultraviolet laser pulse generator, and the other beam of femtosecond laser enters the terahertz pulse generator through a mirror. An ultraviolet laser pulse and a terahertz pulse received by the electron gun enter the cavity of the electron gun to produce an electronic pulse. The electron focusing device is mounted between the cavity of the electron gun and the sample room. A sample assembly and the imaging device are placed inside the sample room in sequence along the emitting direction of the electronic pulse. The camera is placed at a position, facing the imaging device directly, outside the sample room. The device can run in a reflection or transmission mode, can be used in research of both a reversible process and an irreversible process, and is of high brightness and high spatial-temporal resolution.

The invention provides a high-orbit satellite assembly method based on bipropellant unified propulsion system, the method is divided into star structure assembly, propulsion product welding and thermal control product assembly, in which star structure assembly and propulsion product welding are divided into two stages I and II. According to star structure assembly stage I, propulsion product welding stage I, star structure assembly stage II and propulsion product welding stage II are implemented sequentially. Thermal control products include propulsion thermal control products and star structure thermal control products, according to the principle of irreversible process in the entire assembly process interspersed implementation. The process of the invention is conducive to improving theassembly efficiency and ensuring the assembly accuracy and product quality. Through engineering practice, the invention has the advantages of good coordination of the general assembly flow, high general assembly efficiency, strong guarantee of product installation accuracy and redundant control.

The invention discloses a protection method and a protection device for finger vein characteristic cancelable template, and the method comprises the following steps: carrying out the mapping of each neighborhood difference in a finger vein image, and obtaining a difference excitation diagram; judging the direction of the finger vein, calculating the curvature, and obtaining a geometric feature map; combining the differential excitation graph with the geometric feature graph to obtain a two-dimensional feature graph and feature matrixes in two directions; performing dimension reduction on the feature matrix to obtain a feature vector; generating a random number vector, and obtaining a random matrix; combining the feature vectors into a feature matrix, and performing inner product operationon the feature vectors and a random matrix to obtain a cancellable template; projecting the cancellable template to the same subspace, establishing an objective function, and generating a finger veincancellable template; matching the finger vein characteristic cancelable template, calculating the similarity between the test sample and the training sample, and classifying the test sample. According to the invention, the identification performance and revocation/reusability are improved, and the irreversibility, diversity and security are improved.

The invention discloses a method for identifying formation fluid properties through the gas measuring logging power spectrum equivalent index. The method comprises the following steps that a, a powerspectrum is calculated, and a power spectrogram is established based on the calculated result; b, the established power spectrogram is partitioned; c, according to the partitioned power spectrogram, the logging gas measuring power spectrum equivalent identification index is calculated; and d, according to the decision rule, the reservoir fluid properties are determined according to the equivalentidentification index. Single line operation is only conducted on the certain aspects of gas measuring data time-depth to frequency domain conversion, power spectrum partition, power spectrum equivalent identification index calculation and the fluid discrimination rule based on the equivalent identification index, the steps have coherence and irreversibility, and high operability and reproducibility are achieved.

The invention discloses an epileptic electroencephalography amplitude irreversibility analysis method based on equivalent array and standard deviation. The method comprises the steps that an electroencephalogram signal is subjected to negative value processing, a multi-dimension delay vector is established and subjected to equivalent array signifying, amplitude fluctuation of the multi-dimension vector is classified, an amplitude fluctuation mark of the multi-dimension vector is used for correcting an equivalent array type, probability distribution for correcting equivalent array is counted and calculated, and the difference of probability distribution of the array type is calculated. According to the method, the non-linear characteristic of a model sequence is effectively extracted, and the abnormally-high amplitude irreversibility characteristic in the attack stage of epilepsy and the non-balance characteristic higher than healthy brain electrical activity in the attack stage are effectively represented.

The invention discloses a heart rate dynamic time irreversibility analysis method based on equivalent arrangement which is applied to the physiological signal analysis technology field, and aims at solving a problem of lack of effective extraction of dynamic unbalance characteristics in the prior art. In the invention, a dynamic time irreversible concept is innovatively provided, a currently obtained heart rate signal serves as a positive sequence heart rate sequence, a time reverse sequence is performed on the positive sequence heart rate sequence so as to obtain a reverse sequence heart ratesequence. Then, multi-dimensional phase space reconstruction is performed on the positive sequence heart rate sequence and the reverse sequence heart rate sequence. Equivalent arrangement symbolization is performed on a space vector of the reconstructed positive and reverse heart rate sequences, and heart rate dynamic time irreversibility is extracted and identified by calculating a time irreversibility difference between the positive and reverse heart rate sequences in the past and the positive and reverse heart rate sequences in a current state based on equivalent arrangement. The method can be used to effectively extract and identify a dynamic time irreversible characteristic of the heart rates of healthy young people and old people.

A method for model sealing performance degradation stochastic model of underwater connector features that that sealing contact strength is taken as the characterize quantity of sealing performance, and a connector sealing performance heat-solid finite element analysis parameterized model is established, the connector sealing performance is analyzed, the initial time t1 connector sealing performance quantification index is acquired; Secondly, according to the actual condition of the connector, the corrosion rate prediction model is used to predict the corrosion rate of the upper hub, the seal and the lower hub of the connector, so as to obtain the corrosion amount of the above-mentioned structure and the specific size of each structure after corrosion, structural parameter updating is performed on the connector sealing performance heat-solid finite element analysis parameterized model, and the sealing performance index fs2 of the connector at time t2 is calculated again. Thirdly, by using the same method, the connector sealing performance indexes corresponding at any time t3 and t4 are obtained as fs3 and fs4, respectively. At last, consider that randomness and irreversibility of the deterioration of the sealing performance of the connector, Gamma stochastic process is selected to describe the mechanism of seal performance degradation. The characteristic parameters of Gamma stochastic process are estimated by using the connector seal performance indexes fs1, fs2, fs3 and fs4 at different times, and the connector seal performance degradation stochastic model based on Gamma process is obtained.

A self-contained carrying strap (5) for an object rests closely against said object since the length of the strap corresponds to the periphery of the object. As the length of the carrying strap (5) can be modified only once at least in some sections, it can be stretched without resuming the original length thereof after stretching. In this form, the carrying strap (5) is a stable shoulder strap. The carrying strap (5) is not elastic. The stretching step triggers an irreversible process, by which the carrying strap (5) in the stretched state achieves a certain level of stability and rigidity. This process cannot be repeated.

The invention relates to a cave storage liquor storage time timing device and a cave storage liquor storage time timing method, and belongs to the field of liquor storage time identification. The method is characterized by comprising the steps of guiding water drops of stalactitum (9) onto a sealing and tightening iron wire (2) of a wine jar by utilizing a guide pipe according to the irreversibility of the natural growth of the stalactitum (9) in a karst cave, and forming an irreversible entirety by the grown stalactitum (3), the sealing and tightening iron wire and the wine jar (7); and taking a high-definition photo of the stalactitum and the wine jar regularly every year, printing the photos, and storing the photos. The unsealing of the wine jar is determined by utilizing the growth property and irreversibility of the stalactitum, and the storage time of liquor is identified and determined by utilizing the photographing time of the photos, so that the storage time of the cave storage liquor in the wine jar can be determined. According to the device and the method, the accuracy in calculation of the storage time of all cave storage liquor of all types is the same, the market of the cave storage liquor of all types can be greatly standardized and supervised, the credibility of the liquor-type brand can be established, and the market prospect is wide.

The invention discloses a method for separating solid-liquid molecules of a pasty material, belonging to the field of a solid-liquid separation technology. The method is characterized in that the pasty material distributes a fabric membrane to form a film; and pressure is applied so as to form a liquid film on the surface of the material film. Cooling and vacuumizing are performed so that the inside of the entire separation system is in a vacuum environment. A capturing surface is set to capture the liquid molecules. The liquid molecules are captured by the capturing surface before colliding with other molecules in the free moving process; and the liquid molecules constantly escape from the film layer and are captured, thus forming an irreversible process. The entire process is a continuous process, the liquid molecules constantly migrate to the capturing surface and are captured and collected by the capturing surface, and the pasty material after the liquid components are separated is discharged. The method disclosed by the invention has the effects and benefits that the material has strong adaptability, the heated time is short, the vacuum degree of the operation environment is high, the temperature is low, and the material property is not changed; the purity of the obtained liquid components is high; the process is simple and the time is short; and after the liquid holdup is reduced, the viscosity of the solid material is reduced, and solid material has less possibility of being bonded.

The invention relates to the technical field of fluorescent probes, specifically to a high-sensitivity iron ion probe and application thereof. The specific scheme is that the invention discloses a structural formula of the high-sensitivity iron ion probe, and further discloses application in detecting Fe<3+>. When the concentration of the Fe<3+> is 3 mmol/L, the minimum detection limit for Fe<3+>is 0.32 [mu]M, and the Fe<3+> undergoes complexation reaction. The iron ion probe synthesized by the invention has a simple synthesis process, easy availability of raw materials, simple reaction conditions, simple operation and high yield, and is highly selective to Fe<3+> among various common metal ions, and is not interfered by other common ions. The high-sensitivity iron ion probe realizes reaction type identification on the combination of Fe<3+> and is irreversible; the target probe can be used for naked eye detection of the Fe<3+> without any equipment. Moreover, the high-sensitivity ironion probe is short in detection time for the Fe<3+> and higher in sensitivity.

The invention belongs to the field of power system modeling and simulation, A method for construct an equivalent exergy source model of a multi-energy power generation system According to the conceptand significance of exergy, Define flow from the perspective of energy flow exergy Flow Potential and exergy resistance and so on. The exergy resistance is used to characterize the loss in the energyconversion process, reflecting the irreversibility of exergy transfer, and describes the flow potential difference of each power generation system exergy and exergy streams. According to Thevenin's theorem, keep the wind, light, Water, gas and other energy power generation systems are equivalent to a multi-energy power generation system equivalent exergy source model, the characteristic constraints and topological constraints of the equivalent exergy source model of multi-energy power generation system are analyzed. The multi-energy power generation system equivalent exergy source model constructed by the invention realizes the homogenization analysis of each power generation system and the power system, therefore, it lays a foundation for homogeneous modeling of various heterogeneous energy power generation systems.