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917 results about "International standard" patented technology

International standards are technical standards developed by international organizations (intergovernmental organizations), such as Codex Alimentarius in food, the World Health Organization Guidelines in health, or ITU Recommendations in ICT and being publicly funded, are freely available for consideration and use worldwide.

Wavelength discretely tunable semiconductor laser

A wavelength discretely tunable semiconductor laser that addresses wide wavelength tuning range, is mode hopping free, has high output power, has fast wavelength switching time, is wavelength locking free and is relatively simple. Four exemplary embodiments disclosed herein utilize a wavelength discretely tunable semiconductor laser that comprises a discretely tunable filter and laser amplifier. In the first embodiment, the tuning element comprises a pair of cascade Fabry-Perot filters, each having a plurality of characteristic narrow transmission passbands that pass only the cavity mode under the passband. The spacing between the narrow transmission passbands are slightly different in one filter from the other filter so that only one passband from each filter can be overlapped in any given condition over the entire active element gain spectral range, thereby permitting lasing only at a single cavity mode passed by the cascade double filters. One of the two etalon filters can be made with a plurality of transmission passbands predetermined by industry, application and international standards, making this element an intra-cavity wavelength reference and eliminating further wavelength locking needs for the tunable laser. In a second embodiment, one of the two etalons is replaced by a wedge filter. The filter optical path change and thus the transmission passband shift are achieved by translating the wedge filter in a direction perpendicular to the optical axis. In a third embodiment, one of the two etalon filters is replaced by a polarization interference filter. The polarization interference filter consists of an electro-optically-tunable birefringent waveplate, a fixed birefringent waveplate, the laser cavity and T.E. polarization light emitted from the laser diode. In a fourth embodiment, the laser and wavelength tuning structure are integrated on a semiconductor substrate by epitaxy processes.
Owner:JIN HONG

Multifunctional virtual-reality fitness equipment with a detachable interactive manipulator

A multifunctional virtual-reality fitness equipment provide user to select mode of one user doing exercise alone or multiple users participating in on-line internet competition game with others through internet, which has a detachable interactive manipulator equipped with single-chip microcontroller and served as an interface for coupling conventional fitness equipment and personal computer to enable the conventional fitness equipment to become a novel man-machine interaction fitness equipment having function of internet 3-dimensional virtual simulation, and the communication between the detachable interactive manipulator and the personal computer is achieved by employing male-to-female plug-socket connecting means and according the International Standard Communication Protocol; when the detachable interactive manipulator is connected to a personal computer and a fitness equipment, an automatic detection to software program of personal computer shall be executed, if correct message is detected, the fitness equipment will be set in 3-dimensional virtual simulation mode capable of performing an internet 3-dimensional virtual simulation function, and the user may select this mode to execute an on-line internet competition game with others through internet, however, if no software program of personal computer was detected, the fitness equipment is still used as a conventional fitness equipment to provide user doing exercise alone.
Owner:LAI

Dynamic crack length measurement method for machine vision fatigue crack propagation test

The invention provides a dynamic crack length measurement method for a fatigue crack propagation test based on the machine vision technology. The method comprises the following steps: 1, performing machine vision crack measurement system calibration; 2, performing fatigue test, wherein a test piece with precracks begins to generate fatigue cracks along the direction of the precracks, and the fatigue cracks extend; 3, collecting crack images, wherein a mode of collecting single-face images of the test piece and a mode of collecting two-side images of the test piece are used in the fatigue crack propagation test; 4, reinforcing the collected images; 5, identifying the position of the trunk of cracks, as well as peaks and identifying directions of cracks by using the method of image analysis and crack identification; and 6, calculating the actual crack identifying length and crack length. The method has the advantages of simplifying the process and reducing work load; and by the method, the crack identifying process can be visually and accurately observed and recorded, the calculated crack length specified by the international standard can be measured accurately. The method also has the advantages of high measurement accuracy and good system anti-jamming performance.
Owner:平邑经济开发区投资发展有限公司

Method for evaluating QoE (Quality of Experience) of mobile streaming media service perception experience by simulating user behaviors

InactiveCN102685790AEasy to manage centrallyParameter standard objectiveSelective content distributionWireless communicationPsychological ModelsComputation complexity
The invention discloses a method for evaluating QoE (Quality of Experience) of mobile streaming media service perception experience by simulating user behaviors. The method comprises the following steps of: firstly, setting a mobile streaming media service QoE evaluation index system in which the user perception experience of mobile streaming media services are divided into parameters in three aspects of service access, service continuance and service completion; secondly, simulating the whole process of a user using the mobile streaming media services by a test terminal, and acquiring, respectively calculating key performance indexes (KPI) of the mobile streaming media services, calculating key quality indexes (KQI) of corresponding services of the mobile streaming media services, and performing comprehensive operation on the KQIs by means of a psychological model to obtain key experience indexes (KEI) of the corresponding services; and finally, comprehensively analyzing the KEI indexes to obtain a streaming media service QoE value which is in a five-grade marking system and equivalent to international standard MOS (Mean Opinion Score). The method disclosed by the invention is objective and practicable in evaluation parameter standard, simple in operation step, low in calculation complexity and easy to integrate, and is capable of obtaining relatively objective, just user experience perception quality by simulating the mobile streaming media service user.
Owner:北京东方文骏软件科技有限责任公司 +1

Multi-energy source integration hybrid platform system

The invention relates to an integrated multi-energy hybrid power platform, belonging to the technical field of novel hybrid vehicle. The system comprises a power system, a whole-vehicle control system, a brake-energy feeding back system, a data collecting and displaying system and a CAN network. A power unit in the power system is connected with a power battery in parallel by a high-voltage cable, connected with a direct-current alternating-current inverter by a high-voltage relay switch and connected with a controller of the power unit by a signal wire; the whole-vehicle control system is connected with a gear signal generator by a signal wire and is connected with the CAN network by a twisted pair shielding wire; and an asynchronous alternating-current motor is connected with a speed changing box by an output shaft. The core unit of the whole-vehicle control system is a Motorola 32-bit single chip MPC5xx. The integrated multi-energy hybrid power platform can achieve the goal of changing configuration of the power unit without changing the power battery, a driving motor and the whole-vehicle controller. Properties of a hybrid passenger vehicle adopting the integrated multi-energy hybrid power platform can reach or even exceed the national standard, thereby being an advanced international standard.
Owner:TSINGHUA UNIV

Ultra high power graphite resistor rod with 600mm diameter and method for producing the same

ActiveCN101553060ASolve capacitySolve the scale-up problemElectric discharge heatingVolumetric Mass DensityCoal
The present invention provides an ultra high power graphite resistor rod with 600mm diameter and a method for producing the same. The method utilizes domestic coal series acicular coke with low true density in main physicochemical standard, high heat expansion coefficient and sulphur content for producing the large-size ultra high power graphite resistor rod with 600mm diameter. Volumetric density, bending strength, elastic modulus, electric resistivity and heat expansion coefficient of the product reaches the international standard after detecting which can solve difficult problem that the domestic coal series acicular coke can not produce the large-size ultra high power graphite resistor rod with 600mm diameter because of low true density in main physicochemical standard, high heat expansion coefficient and sulphur content, and can realize localization for raw material acicular coke of the large-size ultra high power graphite resistor rod, simultaneity, also can solve problem that the acicular coke depends on importation in a long time and has high cost for restricting expanding yield and scale of the ultra high power graphite resistor rod in carbon industry. The product can reduce cost and improve economic performance.
Owner:KAIFENG CARBON CO LTD OF CHINA PINGMEI SHENMA GRP
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