Abstract: The disclosure provides an internet of things (IoT) device and a battery power detection method. The IoT device includes a battery, an antenna, a radio frequency module, and a processor. The radio frequency module is configured to transmit or receive signals through the antenna, and the radio frequency module has a first power state and a second power state. The processor is configured to detect a first voltage of the battery corresponding to the first power state, detect a second voltage of the battery corresponding to the second power state, compare a voltage difference and a difference threshold between the first voltage and the second voltage, and determine that the battery is in a low battery state according to a comparison result. The first power state is power saving, standby, sleep, or off. The second power state is wake-up, operational, or normal.

Abstract: A suction device includes an elastic base and a release structure connected operably to the elastic base. The elastic base has a peripheral portion for to hermetically contacting a contact surface and defining a vacuum chamber therebetween when a predetermined external force is applied on the elastic base, thereby mounting the elastic base on the contact surface. The release structure has a projection protruding outwardly and partially from the elastic base when an applied force on the elastic base is greater than the predetermined external force and retracting inwardly within the elastic base so as to be disposed in the vacuum chamber when the elastic base is mounted on the contact surface such that a distance between a protruding end of the projection and the contact surface is greater than zero.

Abstract: A suction device includes an elastic base and a release structure connected operably to the elastic base. The elastic base has a peripheral portion for to hermetically contacting a contact surface and defining a vacuum chamber therebetween when a predetermined external force is applied on the elastic base, thereby mounting the elastic base on the contact surface. The release structure has a projection protruding outwardly and partially from the elastic base when an applied force on the elastic base is greater than the predetermined external force and retracting inwardly within the elastic base so as to be disposed in the vacuum chamber when the elastic base is mounted on the contact surface such that a distance between the projection and the contact surface is greater than zero.

Abstract: A LED rail projection lamp is mounted slidably on a rail via a rail connector and includes a main body, a power source, a supporting member, a LED light bulb, a plastic member and a rail connector. The LED rail projection lamp. The supporting member has a first end mounted inside the main body, and a second end connected to the rail connector in such way that the supporting member is rotatable in a range of 0-355 degrees relative to the rail connector and in a range of 0-90 degrees relative to the main body. The LED rail projection lamp is simple in structure and neat-looking because all the fasteners are placed inside the main body and are not visible from outside.

Abstract: The invention discloses a method for adjusting a reference frequency. First, a training signal is received based on the reference frequency. Then, a target region of the training signal is divided by an original training sequence so that a quotient polynomial is generated. Afterward, the quotient polynomial is divided by a predetermined polynomial so that a remainder polynomial is generated. Finally, the reference frequency is adjusted based on the remainder polynomial.

Abstract: A method and an apparatus for acquiring a target frequency of a multi-path signal are disclosed. The multi-path signal includes a first path signal and a second path signal. First, the first path signal is received through a first path and the second path signal is received through a second path. Then, a target region is determined. The target region is a portion of a second cyclic prefix in the second path signal which overlaps with a first cyclic prefix in the first path signal. Afterward, the target frequency is determined based on the target region.

Abstract: The invention discloses a method for adjusting a reference frequency. First, a training signal is received based on the reference frequency. Then, a target region of the training signal is divided by an original training sequence so that a quotient polynomial is generated. Afterward, the quotient polynomial is divided by a predetermined polynomial so that a remainder polynomial is generated. Finally, the reference frequency is adjusted based on the remainder polynomial.

Abstract: A method and an apparatus for acquiring a target frequency of a multi-path signal are disclosed. The multi-path signal includes a first path signal and a second path signal. First, the first path signal is received through a first path and the second path signal is received through a second path. Then, a target region is determined. The target region is a portion of a second cyclic prefix in the second path signal which overlaps with a first cyclic prefix in the first path signal. Afterward, the target frequency is determined based on the target region.

Abstract: The present invention relates to a method for receiving a data by an adaptive code rate over a wireless network. First, a first data packet and a second data packet both corresponding to an identical portion of the data are encoded and received by a first puncturing matrix. If the results of the decoding of the first data packet and the second data packet are both failures, the first data packet combines with the second data packet into a third data packet. Then, the third data packet is decoded to obtain the data. If the result of decoding of the third data packet is still a failure, the portion of the data is encoded by a second puncturing matrix whose code rate is lower than that of the first puncturing matrix. The steps mentioned above are performed repeatedly until the portion of the data is decoded correctly.

Abstract: A sawing machine includes a workbench, a band saw pivotally installed on the workbench, a weight movable between an idle position on the workbench and a working position on the band saw and an adjustable torque provider for providing an adjustable torque to the band saw. The adjustable torque is set to a maximum when the weight is in the idle position in order to lift the band saw from the workbench. The adjustable torque is set to a minimum when the weight is in the working position in order to lower the band saw toward the workbench.

Abstract: There is disclosed a sawing machine including a workbench, a band saw pivotally installed on the workbench, a weight movable between an idle position on the workbench and an operative position on the band saw and an adjustable torque provider for providing an adjustable torque to the band saw. The adjustable torque is set to a maximum when the weight is in the idle position in order to lift the band saw from the workbench. The adjustable torque is set to a minimum when the weight is in the working in order to lower the band saw toward the workbench.

Abstract: There is disclosed a vice including a workbench, a stationary jaw installed on the workbench, a seat installed on the workbench, a screw inserted through the tunnel and a movable jaw attached to the screw. The seat defines a tunnel, a space in communication with the tunnel and a cavity in communication with the space. A lock is put in the space for movement between an engagement position and a disengagement position. In the engagement position, the lock is engaged with the screw so that rotation of the screw relative to the lock causes their relative movement. In the disengagement position, the lock is disengaged from the screw so that the screw can be moved relative to the lock freely. A key is put in the cavity for moving the lock between the engagement position corresponding to a fine-tuning step and the disengagement position corresponding to a quick adjustment step.

Abstract: A method for forming a folded fin includes at least the following steps: providing a horizontal metallic strip; forming number of pairs of indents alternately in a top face and a bottom face of the strip; clamping the strip with three folding tools, wherein a first tool is located between a first pair of indents in the top face of the strip, a second tool is located between a successive second pair of indents in the bottom face of the strip and a third tool is located between a fuirther successive third pair of indents in the top face of the strip; and moving the second and third tools toward the first tool to a position where parts of the strip between the first and second tools and between the second and third tools are bent to be vertical, wherein the third tool moves horizontally toward the first tool and the second tool moves at an angle toward an upper side of the first tool.

Abstract: A machine for forming an inverted U-shaped folded fin with an aspect ratio of H/W includes a stationary frame, a locating device, a folding tool carrier and successive first, second and third folding tools. The carrier is horizontally and reciprocally mounted on the frame. The three folding tools are drivably carried by the carrier, each tool with a width substantially equal to W including an upper clamping block and a lower clamping block respectively for fixing a metal strip during formation of the heat dissipating fin. The first and second tools and the second and third tools are respectively spaced from each other at a distance substantially equal to H when the machine is at an original position. The locating device is also drivably mounted on the frame for fixing the horizontal metal strip relative to the frame when the three folding tools do not clamp the strip.

Abstract: A vise includes a fixed body mounted to a working table. The fixed body includes a compartment defined therein, a longitudinal bore extending therethrough and partially communicating with the compartment, and a transverse bore defined in two lateral sides thereof and communicating with the compartment. A shaft is pivotally mounted in the longitudinal bore and includes a reduced eccentric section. A positioning block is mounted in the compartment of the fixed body and includes a hole in alignment with the transverse bore. An adjusting screw rod is extended through the transverse bore of the fixed body and the hole of the positioning block. The adjusting screw rod includes a first end to which an operative handle is attached and a second end to which a movable jaw is fixedly attached.

Abstract: A solar powered distilling device, and more particularly, a device wherein a plurality of convex lenses concentrate the heat energy of sunlight to heat and vaporize a quantity of water, said water vapor rising from a vaporization chamber to a cooling chamber by virtue of holes provided in the partition therebetween, the water vapor is cooled by virtue of the circulating air in an air cooling chamber, condensing the vapor into water droplets; said droplets being collected in special collection troughs provided for this purpose on the top portion of said partition.

Abstract: A solar powered distilling device, and more particularly, a device wherein a plurality of convex lenses concentrate the heat energy of sunlight to heat and vaporize a quantity of water, said water vapor rising from a vaporization chamber to a cooling chamber by virtue of spaces provided between troughs located there between, the water vapor is cooled by virtue of the circulating air in an air cooling chamber condensing the vapor into water droplets; said droplets being collected in said collection troughs provided for this purpose.