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100results about How to "Ensure repeatability" patented technology

Head and disk tester with a thermal drift-compensated closed-loop positioning system

The head/disk tester of the invention has a housing 43 that houses spindle 44 that rotatingly supports a magnetic disk 31. The housing supports a moveable carriage 30 that, in turn, supports a magnetic head 32. Positioning means 39 and 41 are used to move the carriage and the magnetic head across the magnetic disk. These positioning means include stepper motors that realize coarse positioning of the magnetic head, and a piezo actuator 37 that is used for fine positioning. Linear encoders 40 and 42 located at both sides of the carriage provide feedback information to a closed-loop positioning system that controls the piezo actuator. A set of special signals ("servo bursts") pre-written at a given track of the magnetic disk is used as an additional source of feedback information for the same closed-loop positioning system. This positioning system includes a servo analyzer 45 that reads and processes servo burst signals from the magnetic disk, and a position controller 49 that controls the piezo actuator. The controller contains two control loops: a proportional-integral-derivative (PID) loop and an additional servo burst loop. During any movement of the magnetic head to a prescribed command position, the servo burst feedback is turned off, and feedback from linear encoders is used by the PID loop to move the head. When the magnetic head reaches the prescribed command position, servo burst loop is turned on; it changes the command position of the PID loop in a way to keep the ratio of pre-written burst signals constant. As a result, the position of the magnetic head with respect to the data track remains the same for as long as necessary, even in unstable temperature conditions.
Owner:GUZIK TECHN ENTERPRISES

System and method for accessing the coronary sinus

The invention is generally directed to an accessing system for a patient's coronary sinus which includes a tubular support member with a distal extremity extending into the right atrium of the patient's heart. A guide member is disposed within a first lumen of the tubular support member and advanced out an angled distal tip, through the patient's coronary sinus ostium and into the coronary sinus. A stabilizing member, similar to a conventional intravascular guidewire, is disposed within a second lumen of the tubular support member and extends into the right ventricle of the patient and is seated in the apex thereof. To advance the guide member into the CS ostium, the position of the distal extremity of the tubular support member is adjusted within the atrial chamber by moving longitudinally along or rotating about (or both) the stabilizing member and the guide member is advanced into the CS ostium. These steps may be repeated in a predetermined pattern in order to pass into the coronary sinus ostium.
Owner:CARDIAC PACEMAKERS INC

Traditional Chinese medicine pulse-taking sensor, traditional Chinese medicine pulse-taking diagnosis and treatment system and a health service platform

A traditional Chinese medicine pulse-taking sensor device comprises a pulse-taking array sensor, and the sensor array position is designed according to the gold standard of diagnosis of the portion above the wrist end, the wrist end, the processus styloideus radii, the elbow end and the portion below the elbow end.The traditional Chinese medicine pulse-taking sensor device comprises a difference closed-loop sampling system, a pulse-taking instrument, a traditional Chinese medicine pulse-taking diagnosis and treatment system and a traditional Chinese medicine pulse-taking system health service platform.The health service platform comprises a cloud storage and cloud processing platform, is used for conducting cloud storage on detection results, and matches later-period diseases and selecting treatment schemes by using cloud computing.Stability and repeatability of taking patient pulses are ensured through mechanical design, pulse data of a patient is collected more objectively and accurately through the difference closed-loop sampling system, traditional Chinese medicine resources are optimally configured through an Internet of Things implementing scheme, and the cognition degree of people to traditional Chinese medicine is improved.The 25-point array is set according to the portion above the wrist end, the wrist end, the processus styloideus radii, the elbow end and the portion below the elbow end, and array arranging space with a good diagnosis and treatment effect is obtained.
Owner:北京中科芯健医疗科技有限公司

Method for producing energy and apparatus therefor

A method for producing energy from nuclear reactions between hydrogen and a metal, includes a) production of a determined quantity of micro / nanometric clusters of a transition metal, b) bringing hydrogen into contact with the clusters and controlling its pressure and speed; c) creating an active core for the reactions by heating the clusters up to a temperature that is higher than the Debye temperature TD of the metal; d) triggering the reactions by a mechanical, thermal, ultrasonic, electric or magnetic impulse on the active core, causing the atoms of the metal to capture the hydrogen ions, with liberation of heat; and e)removing the heat maintaining the temperature above TD.
Owner:PIANTELLI SILVIA +2

Alignment of flanged components

This invention concerns alignment of parts of a multi-part component such as an Intermediate Pressure Compressor (IPC) or High Pressure Compressor (HPC) casing. First and second sections (124,126) of a component (114) are provided with flanges (128,130) having contact surfaces (138,140) provided with corresponding surface profiles formed using smooth radius curves to limit the relative locations of the first and second sections (124,126).
Owner:ROLLS ROYCE PLC

Microfluidic chip-based, universal coagulation assay

A microfluidic, chip-based assay device has been developed for measuring physical properties of an analyte (particularly, whole blood or whole blood derivatives). The technologies can be applied to measure clotting times of whole blood or blood derivatives, determine the effects of anticoagulant drugs on the kinetics of clotting / coagulation, as well as evaluate the effect of anticoagulant reversal agents. These technologies can additionally be used to optimize the dosage of anticoagulation drugs and / or their reversal agents. The assay is independent of the presence of anticoagulant; clotting is activated by exposure of the blood sample in the device to a glass (or other negatively charged material such as oxidized silicon) surface, which activates the intrinsic pathway and can be further hastened by the application of shear flow across the activating materials surface. The absence of chemical activating agents and highly controlled and reproducible micro-environment yields a point of care universal clotting assay.
Owner:PEROSPHERE TECH INC

CIGS (copper indium gallium selenium) thin film solar cell and preparation method thereof

The invention discloses a CIGS (copper indium gallium selenium) thin film solar cell and a preparation method thereof, and belongs to the technical field of the solar cell. The solar cell is formed by successively connecting a substrate, a metal anode, a light absorption layer, a buffer layer, a window layer, a transparent electrode layer and a grid-shaped metal cathode, wherein the light absorption layer consists of at least two layers of CIGS thin films of different energy gaps; and each CIGS single layer of the light adsorption layer is directly formed into the film by regulating the magnetron sputtering pressure, the temperature range and the power density, or a prefabricated layer is prepared by magnetron sputtering; and then, the prefabricated layer is subjected to selenylation processing to obtain the CIGS thin film at the temperature of 400-500DEG C under the protection of argon or nitrogen. Each single layer of CIGS thin film disclosed by the invention has different energy gaps, the shape of the energy band of the light absorption layer can be regulated in a combined mode, the collection and light spectrum response curve of a carrier can be both considered, and the absorption efficiency of the light absorption layer is improved by 30-50%. The CIGS thin film solar cell and the preparation method disclosed by the invention have the advantages of high cell photoelectric conversion efficiency, simple technology, simple required equipment and easiness in realizing mass production.
Owner:CHINA AGRI UNIV +1

Method for manufacturing rapid blood sugar test paper

The invention discloses a matching test paper for a glucose tester and a preparation method thereof, which pertain to the technical field of bio-sensor. The substrate of the test paper is printed with a working electrode, a reference electrode and an electrical circuit; one end of the substrate is printed with a conducting wire connected with a read-out instrument; the working electrode and the reference electrode are carbon coatings which are printed on the substrate at once and printed with biological enzyme, a medium and an adhesive. The method adopts bio-sensor and electrochemical principle, produces the test paper by screen printing which is not restricted to a conductive circuit as well as prints relatively sensitive bio-components directly on an electrode holder; screen printing area is fully controlled by a screen printing machine. The encapsulation of the test paper adopts siphon encapsulation which limits reaction space. Once the test paper of the invention contacts human blood, a limited quantity of blood is sucked into a reaction tank and accurate results can be obtained conveniently and visually from a corresponding matching testing instrument. The glucose test paper has the advantages of simple production method, high accuracy and low cost and is convenient for later process and encapsulation and good for scale production.
Owner:胡军

Multifunctional friction wear testing device

The invention discloses a multifunctional friction wear testing device. The device comprises a workbench, a variable loading assembly, an upper friction pair assembly, a reciprocating type lower friction pair assembly, a pin disc type lower friction pair assembly, a crank disc and a spindle motor; a loading rod is fixed in the middle of a cross beam of the workbench; a roller wheel is connected tothe bottom of the loading rod; the upper friction pair component abutting against the roller wheel is arranged below the roller wheel; the upper friction pair assembly is fixed on a side surface stand column and is provided with an upper clamp used for fixing an upper sample piece; and the reciprocating type lower friction pair assembly or the pin disc type lower friction pair assembly is detachably fixed on the workbench below the upper friction pair assembly and is provided with a lower clamp used for fixing a lower sample piece. The two lower friction pair assemblies can be driven by the spindle motor and the crank disc, so that the utilization rate of equipment components is improved, and the overall cost of equipment is reduced; and multiple different friction tests can be realized,a load can be periodically changed, and a roller wheel balancing device ensures that external loading force is radially downward and acts on the upper sample piece.
Owner:HOHAI UNIV CHANGZHOU

Simulation and evaluation method and system for under-salt dolomite water-rock reaction

The invention provides a simulation and evaluation method and system for an under-salt dolomite water-rock reaction. The method comprises analyzing stratum water of a research area; stratum water classification is carried out by using a Sulin method; formulating experimental fluids, preparation of dolomite core sample, dolomite water rock reaction test is performed; the dolomite water-rock reaction is judged to reach chemical equilibrium; the method comprises the following steps: determining the fluid flow rate of the dolomite water rock reaction, carrying out the under-salt dolomite water rock reaction by using the prepared experimental fluid and a dolomite rock core sample, analyzing and calculating the changes of mineral components, corrosion and precipitation, and quantitatively evaluating the influence of the under-salt dolomite formation water on the corrosion and precipitation of the dolomite. According to the method, the quantitative evaluation of the reaction between the dolomite and the corresponding formation water under the geological background of the subsalt dolomite reservoir can be realized; the specific influence of stratum water attributes in the dolomite water-rock reaction process can be analyzed, control factors beneficial to formation and storage of under-salt dolomite pores are defined, and an analysis basis is provided for large-scale and efficient under-salt dolomite reservoir distribution and prediction.
Owner:PETROCHINA CO LTD

Acrosome reaction kit, method for inducing acrosome reaction and detection and method for evaluating acrosome reaction condition

The invention discloses an acrosome reaction kit, which comprises tissue slide preserving fluid, a fluorescent conjugate and a fluorescent sealing solid liquid, wherein each 100 ml of the tissue slide preserving fluid contains 0.5ml of glutaraldehyde, 5ml of methanol, 2ml of ethanol, 0.2g of polyvinylpyrrolidone (PVP), 1ml of formalin and the balance of purified water. The kit can carry out a sperm-induced acrosome reaction and detection; and if calcium ion induction is not carried out, the kit can carry out the acrosome reaction condition evaluation and the acrosome integrity determination. By the tissue slide preserving fluid, the test process for the sperm-induced acrosome reaction and detection is carried out by two parts, samples and test results which are obtained in the first part can be preserved and the final test result cannot be influenced if the operations of the second part are carried out in the subsequent 72 hours, so that the work intensity can be relieved. The fluorescence of a fluorescent staining system is strong and cannot be attenuated after being stabilized for 15 days, so that the detection result is more stable and is easy to interprete and the repeatability of the result can be ensured. The kit and a determination method can be clinically applied and popularized.
Owner:BRED LIFE SCI TECH
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