Abstract: A method for generating an exam is disclosed. The method includes setting initial conditions for the exam, wherein the initial conditions comprises a number of true propositions p, a number of false propositions q, and a number of random propositions r, and determining numbers of different propositions in the exam according to the initial conditions. The method further includes selecting the p number of true propositions, and numbering each of the p number of true propositions with a running number, selecting q number of false propositions, grouping the q number of false propositions, numbering each of the groups with a group number, selecting the r number of propositions, grouping the r number of propositions, numbering each of the groups with a group number. The method further includes generating an exam according to the p number of true propositions, the q number of false propositions, and the r number of propositions.

Abstract: A computer-based method for downloading text content and images in web pages is provided. The method includes downloading a web page as a temporary extensible markup language (XML) file in an application server, and searching the temporary XML file for predetermined information in the temporary XML file. The method further includes searching the temporary XML file for text content in the temporary XML file. Furthermore, the method includes converting a relative path of the image uniform resource locator (URL) to an absolute path by joining the URL of the web page to the front of the relative path of the image URL, and generating a local path for each image in the temporary XML file and storing each image into an application server according to the local path.

Abstract: A wheel for a toy vehicle includes a rim, a tire, and a ballast. The rim includes an outer circumferential surface. The tire is attached to the outer circumferential surface of the rim. The tire and the rim cooperatively define a ring-shaped receiving channel therebetween. The ballast is received in the ring-shaped receiving channel, and slidably connected to the outer circumferential surface of the rim. The weight of the ballast is greater than the frictional force between the ballast and the rim.

Abstract: A wheel includes a metal rim, an electrically conductive hub, a thermoelectric device, and a battery. The metal rim is exposed out of a circumference surface of the wheel for contacting with the ground. The thermoelectric device is connected between the metal rim and the electrically conductive hub for generating electric energy using temperature difference between the metal rim and the electrically conductive hub. The battery has two electrodes connected to the metal rim and the electrically conductive hub, respectively. The battery is configured for collecting electric energy generated by the thermoelectric device.

Abstract: An artificial eye structure rotates an artificial upper eyelid via the attraction between a number of electromagnetic elements disposed in a line and a magnet. The rotation angle of the artificial upper eyelid can be controlled by selectively magnetizing the electromagnetic elements.

Abstract: A low-pass filter (10) includes an input portion (100) inputting an electromagnetic signal, an output portion (120) outputting the electromagnetic signal, a high impedance transmission portion (140) electrically connected to the input portion and the output portion to transmit the electromagnetic signal therebetween, a first low impedance transmission portion (160) electrically connected to the input portion and an end of the high impedance transmission portion, and a second low impedance transmission portion (180) electrically connected to the output portion and another end of the high impedance transmission portion. The two low impedance transmission portions are arranged beside the high impedance transmission portion, and each of the low impedance transmission portions is triangular.

Abstract: A communication device may be used to obtain information regarding a group including a user and one or more group members. The communication device includes a table creating module, a user interface, a salutation obtaining module, and an information searching module. The table creating module is configured for creating a data table according to the one or more group members and relationships among the one or more group members of the group. The data table includes at least two personal nodes and a group node. The user interface is configured for acquiring login information about the user. The salutation obtaining module is configured for obtaining a salutation that is used by the user for obtaining a group member's information in the group. The information searching module is configured for locating a personal node corresponding to the group member in the data table according to the login information and the salutation.

Abstract: A fastening assembly used for securing a heat dissipation device to a printed circuit board, comprises a sleeve, an inserting device extending through the sleeve, a spring encircling the inserting device and received in the sleeve, and a supporting device inserted in the sleeve. The inserting device engages with a back plate below the printed circuit board. The sleeve is integrally formed of plastic and comprises a hollow body, a resilient portion extending from an outer surface of the body and pressing a bottom of the heat dissipation device upwardly, and four supporting portions extending from the outer surface of the body and pressing a top of the heat dissipation device downwardly. The supporting device is inserted between the body and the resilient portion, and abuts against the resilient portion, to thereby reliably keep the resilient portion at its locked position.

Abstract: A method for controlling a remote LED lamp includes: using a memory unit (452) to record a standard value for indicating a normal environmental brightness and a reference value for indicating a normal LED brightness; using a first sensor (41) to detect real-time brightness of the environmental light and transmit a signal (31) indicating the real-time brightness to the memory unit; using the memory unit to compare the signal with the standard value to obtain a result; using a driving unit (451) to control the LED light lamp to be turned on/off according to the result.

Abstract: A heat dissipation assembly comprises a heat sink for being disposed on an electronic component mounted on a printed circuit board, and a pair of fasteners for securing the heat sink on the printed circuit board. Each fastener comprises a sleeve extending through the printed circuit board, a latch received in the sleeve, a stretchable pole inserted through the sleeve and a handle pivotably fixed to the pole. The pole is raised by rotation of the handle to a locked position. At the locked position, the handle downwardly acts on the heat sink, and the pole pushes the latch out of the sleeve. The latch presses against the printed circuit board upwardly to realize an intimate contact between the heat sink and the electronic component.

Abstract: A heat dissipation device includes a base, a fin group located on the base, a first heat pipe and a second heat pipe. The fin group includes a first fin group, a second fin group arranged on the first fin group and a third fin group arranged on the second fin group. The first heat pipe includes an evaporating portion sandwiched between the base and the first fin group, a condensing portion sandwiched between the first fin group and the second fin group, and a connecting portion interconnecting the evaporating portion and the condensing portion. The second heat pipe includes an evaporating portion sandwiched between the base and the first fin group, a condensing portion located between the second fin group and the third fin group, and a connecting portion interconnecting the evaporating portion and the condensing portion thereof.

Abstract: A supporting device for supporting a flat panel display device includes a base, a sliding member, a supporting member, and a holding member. The base defines a pair of guiding grooves extending along a lengthwise direction of the base. The sliding member includes a first pedestal and a second pedestal. The first pedestal and the second pedestal are slidably received in the guiding grooves. The supporting member is hinged to the sliding member, and configured for supporting the flat panel display device. The holding member is slidably engaged with the base, and defines a holding cavity for receiving the supporting member.

Abstract: An LED (light emitting diode) lamp includes an upper base plate, a lower base plate spaced from the upper base plate and a plurality of light emitting modules located between the two base plates. The lower base plate defines a plurality of through holes therein. Each light emitting module comprises a heat sink sandwiched between the two base plates, an LED module embedded in a bottom surface of the heat sink and a lens engaging with the bottom surface of the conductive cylinder to enclose the LED module therein. A lower portion of each lens extends downwardly through a corresponding through hole.

Abstract: A lock device includes a first mounting unit, an operating member, a first and second actuating member, a magnet member and a latch member. The first mounting unit includes a main portion and two flanges bent from the first main portion. Each flange defines a notch. The operating member is configured for moving relative to the first mounting unit in a direction. The first and second actuating members are configured for respectively moving toward and proximate to one notch. The latch member is configured for being pivotable between a locking position and an unlocking position. In the locking position, the latch member is attracted by the magnet member and protrudes into one notch with engaging one flange. When the operating member moves in the direction, the latch member is pushed away from the first mounting member by means of one actuating member.

Abstract: A clutch includes a driving member and a driven member. The driving member includes a rotatable shaft and four breaking blocks radially fixed to the rotatable shaft. Each breaking block includes a thermally deformable main body including an engaging surface, and a heating element and an engaging block formed on the engaging surface. The driven member includes a mounting surface and defines four engagement-receiving portions and a through hole in the mounting surface. The four engagement-receiving portions are positioned and shaped so as when the driving member is assembled to the driven member the four engaging blocks are correspondingly engaged with the four engagement-receiving portions. The rotatable shaft is rotatably inserted through the through hole. The heating element is configured for heating the breaking block to force it to bend the engaging blocks away from the engagement-receiving portions to disengage the clutch.

Abstract: A system for controlling object movement on a machine. The system controls a speed of a working point of the machine according to a dynamic decay speed determined through an exponential function after the working point passes by a buffer distance. A related method and storage medium with instructions for performance of the method also provided.

Abstract: An LED light source includes an LED module and a light-guiding module fixed on the LED module. The LED module includes a printed circuit board and a plurality of LEDs. The light-guiding module includes a frame placed on the LED module and a plurality of light guiding units engaging with the frame. The frame defines an opening in a lower portion thereof to receive the LEDs of the LED module therein and a recess in an upper portion thereof and in communication with the opening. Each of the light guiding units has a base with two flanges respectively fittingly received in two cutouts of the recess of the frame so that the light guiding unit is movable along the recess until it faces a corresponding LED.

Abstract: A cooling fan includes a fan housing, a base, a rotor, a stator, and a fan guard. The fan housing forms an intake and an outlet at two opposite sides thereof, respectively. The base is arranged at the outlet of the fan housing. The stator is mounted on the base. The rotor is rotatably supported by the stator. A plurality of stationary blades extends from the base to the fan housing. The fan guard attaches to the outlet of the fan housing. A cylinder is arranged at a center of the fan guard and attaches to the base of the fan housing. A plurality of guard blades extend radially and outwardly from the cylinder. Each guard blade and the nearest stationary blade define a gap therebetween along a circumference of the cooling fan.

Abstract: An air conditioning system providing cooled air to a vehicle includes a detection device, a control module, and an air adjusting module. The detection device determines whether another vehicle is in front of the vehicle within a predetermined distance, and sends a signal when the other vehicle is detected. The control module is coupled to the detection device and controls the air adjusting module to operate in a recirculation mode upon receiving the signal.