Abstract: A measurement method for the impedance of the converter at multiple operating points based on the secondary-side disturbance includes the following steps: superimposing the positive sequence current disturbance in the current sampling value; superimposing the positive sequence voltage disturbance in the voltage sampling value; determining whether measurement data of the converter at two or more current operating points are obtained, if so, based on the measurement data of the converter at two current operating points, calculating values of A(s) and B(s); further calculating values of coefficients at each frequency point, and obtaining the impedance value of the converter at multiple current operating points by calculation. The above-mentioned measurement method overcomes the disadvantages of high cost and complicated operation of the impedance measurement method based on the primary-side disturbance, and solves the problem of lacking the pre-judgment function.

Abstract: Use of a bone cement preparation in the fabrication of an anti-osteosarcoma drug for killing osteosarcoma cells is provided, wherein the cement paste preparation contains a solid component having a lithium compound and a calcium compound.

Abstract: A keyboard includes a base plate and a backlight module. The base plate has a short axis direction and a long axis direction, and the base plate includes at least one long slit. The long slit is disposed on the base plate along the short axis direction. The backlight module is disposed on the base plate. The backlight module includes a shielding sheet, a light guide plate and a reflecting sheet. An upper surface of the shielding sheet faces toward the base plate. The light guide plate is disposed on a lower surface of the shielding sheet. The reflecting sheet is disposed below the light guide plate. The reflecting sheet includes a plurality of first slits. When the length of the base plate is adjusted along the long axis direction, the reflective sheet is adjusted and moved along with the base plate by expansion of the first slits.

Abstract: A keyboard includes a base plate, a plurality of keys and a backlight module. The base plate has a short-axis direction and a long-axis direction. The keys are disposed on the base plate. The backlight module is disposed on the base plate and includes a shielding sheet, a light guide plate and a reflecting sheet. The light guide plate is disposed on a lower surface of the shielding sheet. The light guide plate includes a plurality of light guide structures corresponding to the keys respectively. Each of the light guide structures includes a ring portion and at least one bend line portion. The bend line portion connects to the ring portion, and the ring portion is formed by a plurality of bending portions. The reflecting sheet is disposed below the light guide plate.

Abstract: A method of synchronization of wireless communication system is provided. The method includes the following steps: receiving a symbol from a wireless communication system by a user equipment; detecting ISI-free region of the received symbol; setting an endpoint of a FFT window within the ISI-free region; detecting shifted primary control frequency and shifted secondary control frequency of the symbol; calculating ICFO based on the shifted primary control frequency and a primary control frequency; calculating secondary control frequency based on ICFO and shifted secondary control frequency; finding the preamble of a frame based on the secondary control frequency; and determining, based on the preamble, a start point of the frame.

Abstract: A keyboard includes a base plate, a plurality of keys and a backlight module. The base plate has a short axis direction and a long axis direction. The keys are disposed on the base plate along the long axis direction, and the keys are arranged to form a plurality of rows. The backlight module is disposed on the base plate and includes a shielding sheet, a light guide plate and a reflecting sheet. The light guide plate is disposed on a lower surface of the shielding sheet. The light guide plate includes a plurality of long openings, and each of the long openings has at least one long side. The long side is parallel to the long axis direction, and each of the long openings has a central axis. The central axis is located between two adjacent rows on which the keys are disposed.

Abstract: The present invention discloses an edge-cloud collaborative fault detection method for a low-voltage distribution network based on a random matrix theory. An edge-cloud collaborative way is adopted, including fast fault detection running in an edge IoT agent and fault timing and locating analysis running in a distribution network control center. At an edge IoT terminal, the fault is quickly detected based on time-delay correlation analysis, a long-time series model is constructed, a time series is fitted with an autoregressive moving average model, and the fault is quickly judged based on a typical value of a limit spectral density function of the time series; after the edge IoT terminal detects the fault, fault-related data are uploaded to the distribution network control center through data screening, historical data and real-time data are integrated, and a spectral deviation index is configured to perform fault timing and locating analysis.

Abstract: A keyboard includes a base plate and a backlight module. The base plate has a short axis direction and a long axis direction, and the base plate includes at least one long slit. The long slit is disposed on the base plate along the short axis direction. The backlight module is disposed on the base plate. The backlight module includes a shielding sheet, a light guide plate and a reflecting sheet. An upper surface of the shielding sheet faces toward the base plate. The light guide plate is disposed on a lower surface of the shielding sheet. The reflecting sheet is disposed below the light guide plate. The reflecting sheet includes a plurality of first slits. When the length of the base plate is adjusted along the long axis direction, the reflective sheet is adjusted and moved along with the base plate by expansion of the first slits.

Abstract: A keyboard includes a base plate, a plurality of keys and a backlight module. The base plate has a short axis direction and a long axis direction. The keys are disposed on the base plate along the long axis direction, and the keys are arranged to form a plurality of rows. The backlight module is disposed on the base plate and includes a shielding sheet, a light guide plate and a reflecting sheet. The light guide plate is disposed on a lower surface of the shielding sheet. The light guide plate includes a plurality of long openings, and each of the long openings has at least one long side. The long side is parallel to the long axis direction, and each of the long openings has a central axis. The central axis is located between two adjacent rows on which the keys are disposed.

Abstract: A keyboard includes a base plate, a plurality of keys and a backlight module. The base plate has a short axis direction and a long axis direction. The keys are disposed on the base plate. The backlight module is disposed on the base plate and includes a shielding sheet, a light guide plate and a reflecting sheet. The light guide plate is disposed on a lower surface of the shielding sheet. The light guide plate includes a plurality of light guide structures corresponding to the keys respectively. Each of the light guide structures includes a ring portion and at least one bend line portion. The bend line portion connects to the ring portion, and the ring portion is formed by a plurality of bending portions. The reflecting sheet is disposed below the light guide plate.

Abstract: A wire cutter suitable for creating a cavity in cancellous bone includes a restrainer and a cutting wire, wherein a portion of the cutting wire will protrude from a slot formed on the restrainer to the outside of the restrainer and inside a bone, when the cutting wire is advanced in a tunnel formed in the restrainer and toward a closed end of the tunnel.

Abstract: The present invention provides a delivery tool and a method for bone grafting on a bone surface via a minimally invasive approach, wherein a structure having a layer of hardened paste and particles under the layer is formed by using the delivery tool. The layer helps to keep particles on the bone surface.

Abstract: Use of a solid calcium compound in the fabrication of a hemostatic agent for reducing bleeding from a surgical site during and/or after a surgical treatment in a patient is provided, wherein the solid calcium compound is selected from the group consisting of calcium phosphate, calcium sulfate, calcium carbonate, calcium oxide, calcium hydroxide, hydroxyapatite, and a combination thereof.

Abstract: A method of synchronization of wireless communication system is provided. The method includes the following steps: receiving a symbol from a wireless communication system by a user equipment; detecting ISI-free region of the received symbol; setting an endpoint of a FFT window within the ISI-free region; detecting shifted primary control frequency and shifted secondary control frequency of the symbol; calculating ICFO based on the shifted primary control frequency and a primary control frequency; calculating secondary control frequency based on ICFO and shifted secondary control frequency; finding the preamble of a frame based on the secondary control frequency; and determining, based on the preamble, a start point of the frame.

Abstract: A percutaneous minimally-invasive procedure to prevent a potential fracture in an osteoporotic vertebra of an osteoporotic patient who has no history of vertebral fracture is provided by minimally-invasively injecting a non-dispersive, biocompatible and resorbable calcium-based cement paste into the osteoporotic vertebral body.

Abstract: An image sensor, a signal acquisition method and a signal acquisition circuit of the image sensor, a storage medium and a terminal are provided. The image sensor includes a plurality of pixel modules, and each pixel module includes: n pixel units connected in series to form a closed-loop structure, wherein n?3, each pixel unit has a first terminal and a second terminal, and each pixel unit includes a photosensitive element and a pixel switch connected in series; and n signal readout terminals, wherein each serial connection point between one pixel unit and the other pixel units is connected with a corresponding signal readout terminal; wherein two adjacent pixel modules share a same pixel unit and signal readout terminals connected with the first terminal and the second terminal of the same pixel unit.

Abstract: In order to deliver porous particulate material into a cavity via a thin tube without substantially crushing the porous particulate material, a two-step process and an apparatus for use therein are provided. The two-step process involves inserting a first rod into the thin tube to push the porous particulate material therein; removing the first rod from the tube; and (a) inserting a second rod into the thin tube, or (b) joining a second rod with the first rod, and inserting the joined first rod and second rod, to push the porous particulate material which remains in the thin tube. In (a), the first rod has a cross sectional area significantly smaller than that of the thin tube, and the second rod has a cross sectional area which is about equal to that of the thin tube. In (b), each of the first rod and the second rod has a cross sectional area about half of the thin tube.

Abstract: A resin-retained denture bridge having an improved bonding between a false tooth or teeth of the bridge and a retainer wire of the bridge is provided in the present invention, wherein a coupling recess is formed on a lingual side of the false tooth and a protrusion or an omega-shaped bend is formed on the retainer wire. The protrusion or omega-shaped bend is received in the coupling recess of the false tooth after or prior to a resin being filled in the coupling recess, which is then cured to form a secure engagement, so that the false tooth is bonded to the retainer with the end portions of the retainer wire extending laterally from the false tooth.

Abstract: A percutaneous minimally-invasive procedure to prevent a potential fracture in an osteoporotic vertebra of an osteoporotic patient who has no history of vertebral fracture is provided by minimally-invasively injecting a non-dispersive, biocompatible and resorbable calcium-based cement paste into the osteoporotic vertebral body.