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148results about How to "Strengthen the system" patented technology

Multi-user wireless communication system based on both-way trunk and method thereof

The invention discloses a multi-user wireless communication system based on both-way trunk and a method thereof; the communication system comprises four multi-antenna transceivers (not only a transmitter but also a receiver) and a multi-antenna both-way trunk; each transceiver is composed of an orthogonal frequency division multiplexing (OFDM) modulator, an OFDM demodulator, a memory and a self-interference eliminator; the both-way trunk is composed of an OFDM modulator, an OFDM demodulator and a beam former and is a semi-duplex amplifying transmission relay. The communication method leads a complete communication process to be finished within two time slots; in the first time slot, the four transceivers send signals to the relay at the same time, and an orthogonal frequency division multiple access is adopted as a multiple access way; in the second time slot, the relay adopts orthogonal frequency division multiplexing / space division multiplexing multiple access (OFDM / SDMA) as a multiple access way for leading received signals after being processed to be broadcasted to the four transceivers. In the invention, two multiple access ways are integrated, and relay beam forming matrixes suitable for different requirements of relay antenna number are respectively designed by adopting the two methods, thereby effectively utilizing space diversity to eliminate interference among the transceivers, and compared with the existing relay communication technology, the higher system and speed are realized.
Owner:SOUTHEAST UNIV

Methods and systems to predict fatigue life in aluminum castings

InactiveUS20090276166A1Accurately fatigue propertyAccurate of fatigue propertyPlug gaugesDigital computer detailsCrazingCasting defect
Methods and systems of predicting fatigue life in aluminum castings that combines extreme values of both casting flaws and microstructures with multiscale life models. The multiscale life models account for differing fatigue crack initiation based on the size scale of the defect and microstructure features, including provisions for generally millimeter scale casting flaws, generally micrometer scale second phase particles by cracking or debonding, or submicrometer scale dislocation interactions with precipitates which form persistent slip bands. In the presence of casting flaws, the fatigue initiation life is negligible and the total fatigue life is spent in propagation of a fatigue crack from such flaws. In the absence of casting flaws, however, the total fatigue life is spent in both crack initiation and propagation, except for the case where fatigue cracks initiate from large second phase particles in a coarse microstructure. The extreme values of casting flaws, second phase particles, mean free path through an aluminum matrix or grain sizes are obtained from extreme value statistics when two or three dimensional sizes of casting flaws and microstructure features are provided by either direct measurement or analytical prediction. The upper bound flaw or microstructure feature size is calculated by extreme value statistics.
Owner:GM GLOBAL TECH OPERATIONS LLC

Method for designing reflecting surface assisted device-to-device communication system

The invention belongs to the technical field of wireless communication, and particularly relates to a design method of a reflecting surface assisted device-to-device communication system. The scheme of the invention is as follows: a base station receives useful signals from cellular users and interference signals from D2D sending equipment multiplexing the same frequency band; and the D2D receiving equipment receives the useful signals from the corresponding D2D sending equipment and the interference signals from the cellular users sharing the same frequency band. According to the invention, the pairing scheme of the D2D pair and the cellular user is determined through a heuristic method, and the sending power of the D2D link and the cellular link and the passive beamforming of the reflecting surface are optimized in a combined manner, so that the maximization of the system sum rate is realized under the condition of meeting the communication rate requirements of the D2D user and the cellular user. Through simulation verification, under the conditions that normal communication of a traditional cellular system is not affected and energy, frequency spectrum and cost expenditure are not additionally increased, the system sum rate is greatly increased, and the method has very high application value and development potential.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Method for improving turn-back capacity of turn-back station, method and system for selecting turn-back capacity improving scheme for turn-back station

The invention discloses a method for improving the turn-back capacity of a turn-back station, a method and system for selecting a turn-back capacity improving scheme for the turn-back station, relating to the technical field of urban track traffic control. The method for improving the turn-back capacity of the turn-back station comprises the following steps: determining a transport index value of a target train according to the passenger flow of the target train about to enter a target turn-back station at the preset peak hours and the current running speed of the target train; determining a cost index value of the turn-back station according to the cost investment of the target turn-back station; and compressing the turn-back time of the turn-back station according to the transport index value of the target train and the cost index value of the turn-back station, thereby improving the turn-back capacity of the turn-back station. According to the method for improving the turn-back capacity of the turn-back station, the method and system for selecting the turn-back capacity improving scheme for the turn-back station, the turn-back time is compressed by determining the transport index value and the cost index value, thereby solving the problem that other capacities are reduced while the turn-back time is compressed by adopting the existing technology for improving the turn-back capacity of the turn-back station.
Owner:TRAFFIC CONTROL TECH CO LTD

Method for preparing yellow mealworm protein

InactiveCN101124936AHigh Bioactive Protein ContentNutrients are stableFood preparationFreeze-dryingAdditive ingredient
The invention provides a preparing method of edible albumen, in particular to a preparing method of yellow meal worm albumen. The method is that the pupas of the live yellow meal worms are cleaned through clean water and are sent into a pulp grinder to be grinded and then are filtered and separated; then the filter residue is cleaned through an amount of clean water twice; then the filter residue and the filtering liquid are sent into a freeze-dry machine to be frozen and then smashed into powder; finally the powder is positioned into a microwave facility to be sterilized under 70 to 80 DEG C and then is packed; then the yellow meal worm albumen finished product is obtained. Compared with the existing animal and plant albumen, the yellow meal worm albumen made through the method has the advantages of low cost, good effect, stable albumen nutrition component in the product, and no severe biologic active material damage; wherein, the yellow meal worm albumen also contains natural L-Chiro-inositol Chitin component with physiologic adjusting function which has high biologic active albumen content and richly contains various amino acid, vitamin and various available mineral elements, which can be eaten directly or served as the nutrition food albumen material. Thus, the yellow meal worm albumen has good popularization and application value.
Owner:杨琳

Electric runner provided with automatic weight measuring system and running method thereof

The invention discloses an electric runner provided with an automatic weight measuring system and a running method thereof, belonging to the field of fitness equipment. The running method comprises the following steps: the weighting mode of the runner machine is selected, and a start button is pressed to start the runner; the system automatically records idle-load starting current Ia of a runner motor at a moment when self-static friction force is overcome by a runner transmission system, i.e., the runner motor just starts rotating; the runner stops rotating automatically one second layer and prompts a practicer to stand at a position which is the front one third of a running belt with two feet; and the practicer restarts the runner, the system automatically records the idle-load starting current Ib of the runner motor at a moment when overlaid friction force of the self-static friction force and the weight of the practicer is overcome by the runner transmission system, i.e., the runner motor just starts rotating, and the system automatically calculates the practical weight c of the practicer according to a difference value between two currents and the body current coefficient K of the runner. The automatic weight measuring system of the runner is used according to a physical principle, so that any fitting is not required to be arranged, and cost and raw materials are saved.
Owner:SHANDONG HUIXIANG FITNESS EQUIP
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