摘要:
The technical problem to be solved by the invention is to provide a fluorophosphate optical glass which has low refraction, low dispersion and low density and is suitable for molding at a low temperature. The fluorophosphate optical glass has a refractive index of 1.45-1.52, an abbe number of 78-85, a transition temperature lower than 465° C., a density lower than 3.8 g/cm3, and a hardness higher than 360 (107 pa). The fluorophosphate optical glass consists of 18-25 mol % of AlF3, 5-20 mol % of Al(PO3)3, 7-12 mol % of MgF2, 15-25 mol % of CaF2, 18-25 mol % of SrF2, 8-20 mol % of BaF2, 0-8 mol % of Ba(PO3)2, 0-3 mol % of YF3 and 0-0.5 mol % of BaCl2. The fluorophosphate optical glass of the invention has the advantages of low refraction, low dispersion, low glass density, higher hardness, good processability, low tapping temperature, easy molding, and ability of effectively preventing stripes.
摘要:
The technical problem to be solved by the invention is to provide a fluorophosphate optical glass which has low refraction, low dispersion and low density and is suitable for molding at a low temperature. The fluorophosphate optical glass has a refractive index of 1.45-1.52, an abbe number of 78-85, a transition temperature lower than 465° C., a density lower than 3.8 g/cm3, and a hardness higher than 360 (107 pa). The fluorophosphate optical glass consists of 18-25 mol % of AIF3, 5-20 mol % of Al(PO3)3, 7-12 mol % of MgF2, 15-25 mol % of CaF2, 18-25 mol % of SrF2, 8-20 mol % of BaF2, 0-8 mol % of Ba(PO3)2, 0-3 mol % of YF3 and 0-0.5 mol % of BaCl2. The fluorophosphate optical glass of the invention has the advantages of low refraction, low dispersion, low glass density, higher hardness, good processibility, low tapping temperature, easy molding, and ability of effectively preventing stripes
摘要:
The invention relates to a method for reducing the PAPR in FRFT-OFDM systems, which belongs to the field of broadband wireless digital communications technology. The method is based on fractional random phase sequence and fractional circular convolution theorem, which can effectively reduce the PAPR of the system. The method of the invention has the advantages of simple system implementation and low computational complexity. In this method, the PAPR of the system can be effectively reduced while maintaining the reliability of the system. When the number of candidate signals is the same, the PAPR performance of the present method was found to be almost the same as that of SLM and better than that of PTS. More importantly, the present method has lower computational complexity than that of SLM and PTS methods.
摘要:
The invention relates to a method that low complexity suppression of PAPR in FRFT-OFDM system, which belongs to the field of broadband wireless digital communications technology and can be used to reduce the PAPR in FRFT-OFDM system. The method is based on fractional random phase sequence and fractional circular convolution theorem, which can effectively reduce the PAPR of system. The method of the invention has the advantages of simple system implementation and low computational complexity. In this method, the PAPR of the system can be effectively reduced while keeping the system reliability. When the number of candidate signals is the same, the PAPR performance of the proposed method was found to be almost the same as that of SLM and better than that of PTS. More importantly, the proposed method has lower computational complexity than that of SLM and PTS.
摘要:
At least one example embodiment discloses a drive system including a motor including a rotor, the motor configured to receive a measured current, a controller configured to generate a voltage command for the motor, a sliding mode observer configured to determine an estimated current for the motor based on the voltage command, determine a difference between the measured current and the estimated current, and determine a switching control vector and an estimator configured to estimate a rotor position based on the switching control vector, the switching control vector being determined based on the difference and adaptive parameters of the sliding mode observer, the controller being further configured to control the motor based at least in part on the estimated rotor position.
摘要:
An anticollision decelerating and emergency brake apparatus of automobile is disclosed. The objects of the invention is realized by the following: an anticollision decelerating and an emergency brake apparatus of automobile constituted by clutch (1), a energy-storage assembly (2), a brake force transmission assembly (3), a combined solenoid valve assembly (4), a housing (5), a variable diameter assembly (6), a reset mechanism (7), and so on. The apparatus of the invention will auto brake to effective prevent and avoid traffic accident, and the damage degree can be minimized.
摘要:
A composite article that can be used as a substrate for coated conductors is disclosed. The composite substrate has at least three layers in which one or more inner layers of Ni—W alloys with 9 at. %-13 at. % W and two outer layers of Ni—W alloys with 3 at. %-9 at. % W. The content of W element gradually decreases from the inner layers to the outer layers. The composite substrate can be prepared using a process of designing and sintering composite ingot, rolling composite ingot and then annealing composite substrate. The composite substrate have a dominant cube texture on the outer layer of the whole substrate which have a weaker magnetism and higher strength than that of a single Ni-5 at. % W alloy substrate. the preformed composite ingot is prepared by filling and compacting the Ni—W mixed powders into a mould layer by layer according to the structure of composite substrate; in said mould, said preformed composite ingots are with the total thickness of 5-250 mm, the thickness of two outer layers being 2/9-⅔ of the total thickness. The method of the present invention can obtain the composite substrate with high mechanical strength and reduced magnetization owing to the use of the Ni alloy with high W content in the inner layers of the composite substrate.
摘要:
At least one example embodiment discloses a method of estimating a position of a rotor in a motor. The method includes determining a first estimated position of the rotor using a first algorithm, determining a second estimated position of the rotor using a second algorithm, the second algorithm being different than the first algorithm, determining a first error based on the first estimated position and the second estimated position, and determining a third estimated position of the rotor based on the first error.
摘要:
The present invention discloses a method for communicatively connecting a protective film/glass and a mobile phone comprising: downloading and installing a mobile phone APP by a user; implanting one or more APP hidden icons to an edge of the display window of the mobile phone touch screen or an area without action icon by the mobile phone APP; attaching the protective film/glass to the mobile phone touch screen; producing touch buttons on the protective film/glass corresponding to a touching-reactionless portion of an upper end or a lower end of a mobile phone touch screen; touching one of the touch buttons, which makes the capacitance of the hidden icon on the mobile phone touch screen changed; waking up or exiting the mobile phone APP quickly and conveniently through the input and output of CPU. Besides a series of traditional uses such as improving of perverting scoring and polluting for mobile phone, through developing mobile phone system, the present invention enables user download APP according their requirements easily, operate a portion of a mobile phone touch screen that is touching-reactionless originally, wake up or exit commonly used application quickly and conveniently, thereby the application area of the mobile phone is enlarged, user experience and playability are improved.
摘要:
A method is provided within a storage processor of a data storage system having a fixed storage capacity shared between a plurality of data storage units, The method includes (a) performing a Compression-related operation on a data storage unit of the plurality of data storage units using a free pool of storage space, associated with the fixed storage capacity, as a swap space for the Compression-related operation, (b) detecting a size of the free pool, the size of the free pool representing unallocated storage space of the data storage system, (c) comparing the size of the free pool with a restricted threshold, and (d) if the size of the free pool falls below the restricted threshold, then pausing the Compression-related operation on the data storage unit, otherwise, continuing to perform the Compression-related operation on the data storage unit. Apparatus and computer program product for practicing the method are also provided.