Abstract: An exemplary metallic cover (20) includes a bottom base (21) and a plurality of side walls (22, 23, 24, 25). The side walls extend from bottom base. The bottom base and each of the side walls are connected by an edge structure (26). The metallic cover is made of a metallic material that has a yield strength in the range from about 80 MPa to about 150 MPa, an elongation ratio in the range from about 15% to about 28%, and a hardness in the range from about 45 HV0.2 to about 70 HV0.2. A method for making the metallic cover is also provided.

Abstract: An imaging lens system with two lenses is provided. The imaging lens system with two lenses, along an optical axis from an object side to an image side, comprises an aperture stop; a first lens having positive refractive power and being a biconvex lens; and a second lens having negative refractive power and being a meniscus lens with a concave surface on the object side and a convex surface on the image side.

Abstract: A method for implementing switching when the network is faulted is disclosed, and the method includes: establishing a quick detection mechanism between non-querier and querier; the non-querier using the detection mechanism for performing a real-time detection on the querier and downlink of the querier; switching the non-querier to be the querier when the non-querier detects that the querier or the downlink of the querier is faulted. A querier is further disclosed. With the method, it can complete a quick switching of the querier and a quick transmission of a multicast flow when the querier or the downlink thereof is faulted, thereby reducing the interrupt time of users receiving the multicast flow, implementing a quick protection of a multicast service, and improving the service experience for the user.

Abstract: An imaging lens system with two lenses is provided. The imaging lens system with two lenses, along an optical axis from an object side to an image side, comprises an aperture stop; a first lens having positive refractive power and being a biconvex lens; and a second lens having negative refractive power and being a meniscus lens with a concave surface on the object side and a convex surface on the image side.

Abstract: A method for fabricating a composition of Zr-rich bulk amorphous alloy includes providing a weld member and a base, both made of Zr-rich bulk amorphous alloy, and welding the weld portion of the weld member to the base by a pulsed laser in a protective gas environment. A maximum power of the pulsed laser exceeds or equals 3.5 kW, and a welding rate exceeds 2 mm/sec.

Abstract: A three-piece optical pickup lens includes, sequentially from an object side to an image side of the three-piece optical pickup lens along an optical axis thereof, an aperture stop, a first lens, a second lens, and a third lens. The first lens is a meniscus lens of positive refractive power. The second lens has an object side and an image side, on each of which at least one inflection point is formed at a position located between a center and a periphery of the second lens. The third lens has an object side and an image side, on each of which at least one inflection point is formed at a position located between a center and a periphery of the third lens, and has positive refractive power at paraxial region of optical axis.

Abstract: A system for modulating audio effects of speakers is provided. The system includes a selecting module, a playing module, a recording module, a time delay computing module and a modulating module. Based on these modules, the system is capable of determining a time difference and a pitch for each of the speakers, and modulating the time difference and the pitch for each of the speakers to a desired time difference and a desired pitch, so as to ensure that simultaneous sounds from each speaker arrive at a microphone at about the same time and with the same audio pitch. A related method is also provided.

Abstract: An imaging lens system with two lenses is provided. The imaging lens system with two lenses, along an optical axis from an object side to an image side, includes an aperture stop; a first lens having positive refractive power and being a plano-convex lens with a convex surface on the image side; and a second lens having negative refractive power and being a meniscus lens with a concave surface on the object side and a convex surface on the image side.

Abstract: A method of surface grinding a Zr-rich bulk amorphous alloy article includes providing a substrate; providing a first surface grinder for rough surface grinding; and providing a second surface grinder for finish surface grinding. During the rough surface grinding, the rotating speed is in the range from 20 r/min to 30 r/min, the grinding time period is from 3 minutes to 12 minutes, and the grinding pressure is from 1 kg/cm2 to 2 kg/cm2, and a first pump circularly conveys a first lubricant to a first rotating abrasive wheel. During the finish surface grinding, the rotating speed is in the range from 30 r/min to 40 r/min, the grinding time period is from 5 minutes to 7 minutes, and the grinding pressure is from 1 kg/cm2 to 2 kg/cm2, and a second pump circularly conveys a second lubricant to a second rotating abrasive wheel.

Abstract: A method of surface grinding a Zr-rich bulk amorphous alloy article includes providing a substrate; providing a first surface grinder for rough surface grinding; and providing a second surface grinder for finish surface grinding. During the rough surface grinding, the rotating speed is in the range from 20 r/min to 30 r/min, the grinding time period is from 3 minutes to 12 minutes, and the grinding pressure is from 1 kg/cm2 to 2 kg/cm2, and a first pump circularly conveys a first lubricant to a first rotating abrasive wheel. During the finish surface grinding, the rotating speed is in the range from 30 r/min to 40 r/min, the grinding time period is from 5 minutes to 7 minutes, and the grinding pressure is from 1 kg/cm2 to 2 kg/cm2, and a second pump circularly conveys a second lubricant to a second rotating abrasive wheel.

Abstract: Along an optical axis from an object side to an image side, a short overall length imaging lens system with four lenses includes a first lens with positive power that is a meniscus spherical/aspherical lens with a convex surface on the object side; an aperture stop; a second lens with negative power that is a meniscus aspherical lens with a convex surface facing the object side; a third lens with positive power that is a meniscus aspherical lens and a concave surface on the object side; and a fourth lens with negative power that is a biconcave aspherical lens with at least one inflection point in the effective diameter range of the optical surface on the image side so as to make the positive power gradually change into negative power. Moreover, the imaging lens system satisfies the following conditions: 0.25 ? d ? ? 2 + d ? ? 4 + d ? ? 6 f s ? 0.40 ; 0.8 ? Y · tan ? ( ? ) Bf ? 2.

Abstract: A method of cutting bulk amorphous alloy includes: positioning a target cutting path of the bulk amorphous alloy in an atmosphere of an inert gas; cutting the target cutting path to form a cut surface using a pulsed laser; and removing a plurality of burrs located on the cut surface produced during the cut.

Abstract: A rain sensor mounted on a windshield of a vehicle comprises: a housing having an opening, at least an emitter disposed in the housing and used for emitting light beams, a coupler, and an optical detector. The coupler connecting and covering the opening of the housing, comprises: at least a collimator receiving and collimating the light beams into collimated light beams; and at least a groove having a deflection surface to reflect the collimated light beams that passes through the collimator and is incident to the deflection surface at an incident angle ? to the windshield. The optical detector disposed in the housing is used for receiving the collimated light beams reflected by the windshield and generating electrical signals. The present invention characterized in that the incident angle ? satisfies the following condition: 1.27<n*sin ?<1.52, wherein n is refractive index of the coupler.

Abstract: A two-element f-? lens used for a micro-electro mechanical system (MEMS) laser scanning unit includes a first lens and a second lens, the first lens is a positive refraction meniscus lens of which the convex surface is disposed on a side of a MEMS mirror, the second lens is a positive refraction meniscus lens of which the convex surface is disposed on the side of the MEMS mirror, at least one optical surface is an Aspherical surface in both main scanning direction and sub scanning direction, and satisfies special optical conditions. The two-element f-? lens corrects the nonlinear relationship between scanned angle and time into the linear relationship between image spot distances and time. The two-element f-? lens focuses the scan light to the target in the main scanning and sub scanning directions, such that the purpose of the scanning linearity effect and the high resolution scanning can be achieved.

Abstract: A two-element f-? lens used for a micro-electro mechanical system (MEMS) laser scanning unit includes a first lens and a second lens, the first lens is a positive refraction meniscus lens of which the convex surface is disposed on a side of a MEMS mirror, the second lens is a positive refraction meniscus lens of which the concave surface is disposed on the side of the MEMS mirror, at least one optical surface is an Aspherical surface in both main scanning direction and sub scanning direction, and satisfies special optical conditions. The two-element f-? lens corrects the nonlinear relationship between scanned angle and time into the linear relationship between image spot distances and time. The two-element f-? lens focuses the scan light to the target in the main scanning and sun scanning directions, such that the purpose of the scanning linearity effect and the high resolution scanning can be achieved.

Abstract: An miniature three-piece optical imaging lens with short back focal length, along an optical axis from the object side to the image side including: a first lens of positive refractive power that is a meniscus aspherical lens having a convex surface on the object side, an aperture stop, a second lens of negative refractive power that is a meniscus aspherical lens having a convex surface on the image side, a third lens of negative refractive power that is an aspherical lens whose center is on the optical axis, while on the lens center the convex surface is on the object side and the concave surface is on the image side. Moreover, from the center of the third lens element toward the edge, the refractive power changes from negative power, through an inflection point, to positive power. Furthermore, the optical imaging lens further satisfies conditions: 0.25 ? bf TL ? 0.4 wherein bf is back focal length, TL is total distance on the optical axis from the object side of the first lens to the image plane.

Abstract: An apparatus and method are disclosed for producing a semantic representation of information in a semantic space. The information is first represented in a table that stores values which indicate a relationship with predetermined categories. The categories correspond to dimensions in the semantic space. The significance of the information with respect to the predetermined categories is then determined. A trainable semantic vector (TSV) is constructed to provide a semantic representation of the information. The TSV has dimensions equal to the number of predetermined categories and represents the significance of the information relative to each of the predetermined categories. Various types of manipulation and analysis, such as searching, classification, and clustering, can subsequently be performed on a semantic level.

Abstract: The present invention discloses an aspherical LED angular optical lens for central distribution patterns and an LED assembly using the same. The optical lens comprises a concave surface on a source side and a convex surface on an project side. The LED assembly comprising the optical lens can accumulate light emitted from the LED die and generate a peak intensity of the central angular circle distribution pattern which is greater than 72° and smaller than 108°. The present invention only uses a single optical lens capable of accumulating light and forming a required distribution pattern to satisfy the requirement of a luminous flux ratio greater than 85% and the requirement of an illumination, a flash light of a cell phone or a flash light of a camera.

Abstract: A resonant converter for improving synchronous rectification control is provided. The resonant converter obtains an input power, and through a switch unit, the period of the input power to be transmitted to a resonant circuit can be modified. The resonant converter further includes two transformers electrically connected to the resonant circuit, two synchronous controllers electrically connected to the primary sides of two transformers respectively, and two synchronous rectifiers electrically connected to the secondary sides of two transformers. The input power modified by the resonant circuit is obtained by the primary sides of two transformers, and two induced power are respectively produced at the secondary sides. Then, through sensing the polarity variation of the voltage, the two synchronous controllers individually provide a synchronous driving signal.

Abstract: Along an optical axis from an object side to an image side, a short overall length imaging lens system with four lenses includes a first lens with positive power that is a meniscus spherical/aspherical lens with a convex surface on the object side; an aperture stop; a second lens with negative power that is a meniscus aspherical lens with a convex surface facing the object side; a third lens with positive power that is a meniscus aspherical lens and a concave surface on the object side; and a fourth lens with negative power that is a biconcave aspherical lens with at least one inflection point in the effective diameter range of the optical surface on the image side so as to make the positive power gradually change into negative power. Moreover, the imaging lens system satisfies the following conditions: 0.25 ? d ? ? 2 + d ? ? 4 + d ? ? 6 f s ? 0.40 ; 0.8 ? Y · tan ? ( ? ) Bf ? 2.