Abstract: Described herein is a wavelength reference device comprising a housing defining an internal environment having a known temperature. A broadband optical source is disposed within the housing and configured to emit an optical signal along an optical path. The optical signal has optical power within a wavelength band of interest. An optical etalon is also disposed within the housing and positioned in the optical path to filter the optical signal to define a filtered optical signal that includes one or more reference spectral features having a known wavelength at the known temperature. The device also includes an optical output for outputting the filtered optical signal.

Abstract: A walk-behind self-propelled working machine includes a main body, an operation switch, and a handle device. The main body includes a moving assembly and a drive motor. The operation switch is connected to the drive motor. The handle device is connected to the main body and includes an operation member, a connecting rod, and a sensing device. The operation member includes a gripping portion for a user to hold. The connecting rod is connected to the main body. The sensing device is configured to sense a thrust that is applied to the handle device to drive the walk-behind self-propelled working machine and further includes a pressure sensor and a pressing member. When the gripping portion receives the thrust, the pressing member applies a force along a preset straight line to the pressure sensor to drive the pressure sensor to deform.

Abstract: A power tool includes a housing, a motor, a ball sleeve, an oscillating member with a mounting portion, and an output shaft rotating around an output shaft axis. The oscillating member and the ball sleeve are engaged in an engagement region on the oscillating member, and the geometric center of the engagement region is an engagement center. A first plane bisects the first bearing assembly along a direction of the output shaft axis, and a second plane bisects the second bearing assembly along the direction of the output shaft axis. The height from the engagement center to the first plane is a first height H1, the height from the engagement center to the second plane is a second height H2, and the ratio H1/H2 of the first height H1 to the second height H2 is greater than or equal to 0.5 and less than or equal to 1.4.

Abstract: An optical imaging lens assembly is provided, along an optical axis from an object side to an image side, sequentially includes: a first lens having positive refractive power; a second lens having refractive power, and an object-side surface of the second lens being a convex surface; a third lens having refractive power, an object-side surface of the third lens being a convex surface, and an image-side surface of the third lens being a convex surface; and a fourth lens having refractive power. Half of a maximum field-of-view Semi-FOV of the optical imaging lens assembly and a maximum incident angle of a chief ray CRAmax of the optical imaging lens assembly to an electronic photosensitive component satisfy: 2.5<Tan(Semi-FOV+CRAmax)<3.5.

Abstract: Methods, apparatus and systems for wireless communication are described. One method includes receiving, by a network device of a wireless network, an indication to perform N one-to-one mappings, wherein each mapping is between a Quality of Service (QoS) flow and a radio bearer, wherein N is a positive integer and controlling communication in the wireless network according to the indication.

Abstract: A fixture for unpacking a carton, wherein the fixture includes a fixed portion and a rotating portion. The fixed portion includes a first frame, a first plurality of suction components, and a first driving component arranged on the first frame. The a rotating portion includes a second frame connected to the first frame and capable of rotating or being fixed relative to the first frame under the driving of the first driving component, a third frame arranged on the second frame, a second plurality of suction components arranged on the third frame, and a second driving component connected to the second frame and the third frame.

Abstract: An impact tool includes an output shaft for outputting torque, where the tightening torque of the output shaft to a workpiece is greater than or equal to 700 foot-pounds; and an impact assembly that provides an impact force to the output shaft. A main shaft ball groove includes a first ball groove that extends spirally about a main shaft axis and is concave on an outer surface and a second ball groove that extends spirally about the main shaft axis and is concave on the outer surface. An impact ball groove includes a third ball groove that mates with the first ball groove to accommodate the rolling ball and a fourth ball groove that mates with the second ball groove to accommodate the rolling ball. The included angle ? between the first ball groove and the second ball groove is less than the included angle ? between the third ball groove and the fourth ball groove.

Abstract: A MEMS gyroscope for three-axis detection relates to the technical field of gyroscope and includes a substrate, a sensing unit elastically connected with the substrate, and a driving unit coupled with the sensing unit and driving the sensing unit to move. The substrate includes anchor point structures respectively located at four corners of the substrate and four coupling structures respectively elastically connected with the four anchor point structures. An avoiding space is formed between two adjacent coupling structures. The driving unit includes two driving pieces separately elastically connected with adjacent coupling structures. The two driving pieces are symmetrically arranged and are frame-shaped. The sensing unit includes four X and Y mass blocks, two Z mass blocks elastically connected with the driving pieces, and two decoupling mass blocks. The two decoupling mass blocks are elastically connected.

Abstract: A method and device for mixedly playing a program are provided by embodiments of the disclosure, the method of mixedly playing a program including: playing, in a first player interface of an application, a first multimedia program in a first list, the application being used to play at least two types of multimedia programs included in the first list; receiving a switching operation in the application, the switching operation being used to instruct the first multimedia program being played to switch to a second multimedia program in the first list; and if a type of the first multimedia program is different from the second multimedia program, playing the second multimedia program in a second player interface of the application, the first player interface and the second player interface being used to play different types of multimedia programs respectively.

Abstract: The disclosure provides a cloud computing-based adaptive storage layering system and method. The system includes a data node management module, a metadata management module, an adaptive storage layering module, and a pre-aggregated query routing module. According to predefined rules, node capacity is expanded and shrunk, collected queried hit models and scanned file paths are aggregated and sorted, and layering loading and pre-loading are performed on files. Based on the disclosure, an efficient On-Line Analytical Processing (OLAP) query execution engine may be constructed, to deal with complex OLAP queries of various reporting system. Therefore, the execution efficiency of cloud OLAP engines can be significantly enhanced.

Abstract: A handheld power tool includes a motor, a handle having a first switch for starting and stopping the motor, an output assembly, and an adjustment device including a telescopic rod assembly. The length of the adjustment device changes so that the handheld power tool has at least first and second working states. The distance between the frontmost side of the handheld power tool and the rearmost side of the first switch is an effective length of the handheld power tool. When the handheld power tool is in the first working state, the handheld power tool has a first effective length T1. When the handheld power tool is in the second working state, the handheld power tool has a second effective length T2. The first effective length T1 is less than or equal to 1 m, and the second effective length T2 is greater than the first effective length T1.

Abstract: A process is provided to fabricate a finFET device having a semiconductor layer of a two-dimensional “2D” semiconductor material. The semiconductor layer of the 2D semiconductor material is a thin film layer formed over a dielectric fin-shaped structure. The 2D semiconductor layer extends over at least three surfaces of the dielectric fin structure, e.g., the upper surface and two sidewall surfaces. A vertical protrusion metal structure, referred to as “metal fin structure”, is formed about an edge of the dielectric fin structure and is used as a seed to grow the 2D semiconductor material.

Abstract: An adaptive guiding device includes a hollow flexible catheter, which is pre-shaped and has a bend in a natural state. The distal part of the flexible catheter includes a distal section, the distal section includes a transition segment and a straight segment, the transition segment is bendable so as to change an orientation of the straight segment, and a bending force application point is adjacent to a connection of the transition segment with the straight segment.

Abstract: A guide tube assembly for transcatheter treatment system has opposing distal and proximal ends. The distal section of the guide tube assembly has a curved extension including a first curved section, which is configured to have a bend angle by pre-shaping and/or bending, and a second curved section, which is located at a distal end of the first curved section and configured to have a bend angle by bending. The first curved section and the second curved section are located in different planes and provided by one or two tubes respectively which are movably inserted one in the other. The guide tube assembly is more suitable for interventional operations in complex physiological structures.

Abstract: The disclosure discloses an optical imaging lens assembly, which includes ten lenses, wherein, from an object side to an image side, the ten lenses sequentially includes a first lens with positive refractive power, a second lens with refractive power, a third lens with refractive power, a fourth lens with refractive power, a fifth lens with negative refractive power, a sixth lens with refractive power, a seventh lens with refractive power, an eighth lens with refractive power, a ninth lens with positive refractive power and a tenth lens with negative refractive power; and the lenses are independent of one another and have air spaces on an optical axis.

Abstract: A display terminal adjustment method is provided, this method includes: obtaining image data of an image to be displayed and screen data of the display terminal; obtaining a first adjustment ratio and a second adjustment ratio according to an image size in the image data and a screen size in the screen data; adjusting the image to be displayed to obtain a first target image according to the first adjustment ratio, and adjusting the image to be displayed to obtain a second target image according to the second adjustment ratio; and adjusting the display terminal to be in a target display mode according to the first target image and the second target image, according to this method, a size of a blank area of the display terminal is reduced, and an utilization rate of the screen of the display terminal is improved.

Abstract: The present invention relates to an accelerometer, which comprises a substrate and detecting devices. The substrate is provided with supporting anchor points and electrode fixing anchor points; the detecting device comprises two detecting plates and corresponding detecting electrodes, and the detecting electrodes are connected to the electrode fixing anchor points through connecting arms; the detecting plate is elastically connected to the supporting anchor point, the two detecting plates are asymmetrically arranged with respect to axes of the supporting anchor points, and the two detecting plates are parallel to each other and in opposite directions; and the detecting electrodes and the detecting plates are arranged at intervals to form a detecting capacitor.

Abstract: This invention provides an ELISA detection kit and method for IgA antibody against Porcine rotavirus group A, belonging to the field of animal husbandry detection technology. The ELISA detection method of this invention utilizes popular PoRV variant strains as parental strains to successfully express recombinant VP6 fusion protein in vitro. Subsequently, the VP6 fusion protein was used as an antigen to be coated onto enzyme-labeled plate to establish a novel ELISA detection method. The method provided by this invention possesses strong sensitivity, high specificity, robust stability, good reproducibility, and ease of preparation, and holds important clinical practical significance for the diagnosis, prevention and control of PoRV.

Abstract: A sleeve includes a main body, the main body defines a first channel passing through the main body in an axial direction, and a side wall of the main body defines at least one second channel which is communicated with the first channel. When the sleeve abuts against the ventricular tissue wall, the fluid can only flow out from the second channel in the side wall of the sleeve, which means that the needle can be advanced for treatment of the ventricular tissue.

Abstract: An interventional injection device includes an operating handle, a sheath and an injection member. The operating handle includes a housing and a driving assembly. The driving assembly includes a driving knob that is rotatably connected to the housing and a driving rod that is movably inserted into the housing and threaded to the driving knob. A proximal end of the sheath is fixedly connected to the housing. The injection member is movably inserted in the sheath. The injection member includes a first channel and an injection needle connected to a distal end of the first channel in a tight seal, and a proximal end of the injection member is fixedly connected to the driving rod. The driving rod is configured to move axially by rotation of the driving knob relative to the housing.