Abstract: A mechanism, configured for positioning a work piece, includes a support member and a position assembly. The position assembly includes a guiding member and a positioning sleeve sleeved on the guiding member. The guiding member detachably is coupled to the support member. The positioning sleeve is detachably coupled to the support member. The guiding member is partially exposed from the positioning sleeve.

Abstract: According to embodiments, a derived cache that is derived from a first instance of particular data is used to speed up queries and other operations over a second instance of the particular data. Traditionally, a DBMS generates and uses derived cache data only for the database data from which the derived data was derived. However, according to embodiments, derived cache data associated with a first instance of database data is relocated to the location of a second, newly created, instance of the database data. Since the derived cache data is derived from an identical copy of the database data, the cache data derived for the first instance can successfully be used to speed up applications running over the second instance of the database data.

Abstract: An electrical connector including an insulating body, multiple terminals received in the insulating body, and a contact member. The insulating body includes a base and a tongue extending forward from the base. The tongue has a rear segment and a front segment, and the rear segment is higher than the front segment. Each terminal has a mating portion exposed from the front segment. The front segment has an isolation portion close to the rear segment, and the isolation portion is higher than the mating portion and lower than the rear segment. The contact member is disposed at the rear segment, and used for buckling a grounding elastic sheet of a mating connector during mating. The isolation portion is at least partially located on an insertion path of the grounding elastic sheet.

Abstract: Embodiments of the present invention disclose a method and system for collecting statistics on streaming media data, and a related apparatus, which are applied to the field of communications technologies. When playing a streaming media program, a client may receive a user flag to mark given streaming media data in the streaming media program, for example, first streaming media data, and send position information of the first streaming media data marked by the user flag, the user flag, and an identifier of the streaming media program to a server, so that the server counts the quantity of user flags on streaming media data at each position of the streaming media program. Each client sends, to the server, user flags on different positions of a streaming media program, and the server counts the quantities of user flags.

Abstract: An electrical connector includes an insulating body, a shielding sheet disposed in the insulating body, and a ground terminal received in the insulating body for mating with a mating connector. The ground terminal is fixed between a plate surface of the shielding sheet and the insulating body. The ground terminal includes a front end, a middle section, and a rear end having a soldering portion. A first contacting portion is disposed at the front end, a second contacting portion is disposed at the middle section, and the first contacting portion and the second contacting portion respectively electrically contact with the shielding sheet.

Abstract: An includes an insulation body, multiple terminals, an inner metal shell, and an outer metal shell. The insulation body has a base and a tongue located in a front end of the base. The terminals are fixedly arranged in the base in upper and lower rows. Each terminal has a contact portion exposed to an upper surface or a lower surface of the tongue. The inner metal shell has a covering portion disposed on the upper surface of the tongue, and an extending portion extending from the covering portion to the base, and covering the base. The outer metal shell wraps the inner metal shell.

Abstract: An electrical connector includes an insulating body, a shielding sheet disposed in the insulating body, and a ground terminal received in the insulating body for mating with a mating connector. The ground terminal is fixed between a plate surface of the shielding sheet and the insulating body. The ground terminal includes a front end, a middle section, and a rear end having a soldering portion. A first contacting portion is disposed at the front end, a second contacting portion is disposed at the middle section, and the first contacting portion and the second contacting portion respectively electrically contact with the shielding sheet.

Abstract: The invention relates to a method for extracting ground attribute data in interferometry synthetic aperture radar data, and aims at providing a method for extracting ground attribute data in PS data. The method comprises the following steps that ground geographic data are led; ground boundary data are contracted inwards by Tx in the east-west direction, and are contracted inwards by Ty in the south-north direction, and a new ground boundary is determined again; whether each PS point falls into the new ground boundary or not is judged, and if yes, the data are extracted; if not, the data are removed; a first data set after extraction is obtained; whether the gray value of a PS point image in the first data set is between Vmin and Vmax or not is judged, and if yes, the data are further extracted; if not, the data are removed. The ground attribute data are extracted through the method, so that the accuracy of PS points is 95.1 percent.

Abstract: A positioning device includes a fixing mechanism, a first positioning assembly, a second positioning assembly. The fixing mechanism includes a base, a first moving member movably passing through the base, and a second moving member movably passing through the base. The first positioning assembly includes a bottom board and two first guide portions protruding from the bottom board. Each first guide portion forms one first incline surface. The second positioning assembly includes a base body and two second guide portions. The base body is positioned between the two first guide portions respectively positioned on opposite side surfaces of the base body. Each second guide portion forms a guiding surface. The first moving member is fixed with the bottom board at one end away from the base. The second moving member is fixed with the base body at one end away from the base.

Abstract: A method of providing video feeds from a plurality of cameras to a plurality of screens including determining a plurality of constraints on a centralized processor processing the video feeds, determining a camera semantic classification for each of the plurality of cameras, determining historical events captured by each of the plurality of cameras, and providing at least one video feed to at least one of the screens according to the plurality of constraints on the centralized processor, the camera semantic classifications and the historical events.

Abstract: An electrical connector includes an insulating body, upper row terminals and lower row terminals disposed in the insulating body, and a shielding casing placed on an outer side of the insulating body. The insulating body includes a base portion, and an elevated portion disposed below the base portion. Each of the terminals has a connecting portion located in the elevated portion. A shielding plate integrally extends from a bottom wall of the shielding casing to be located in front of the elevated portion. A back cover integrally bends from a top wall of the shielding casing to be located behind the elevated portion. When the electrical connector is soldered to a circuit board, the shielding plate and the back cover isolate the connecting portion from an external environment, so that the electrical connector is not affected by external electromagnetic interference (EMI) during transmission of high-frequency signals.

Abstract: A method, an apparatus, and a system for locating sensor data. The method includes the steps of: obtaining an index table; intercepting a query for sensor data in runtime; extracting a characteristic parameter from a query condition; locating a block identifier of matching sensor data storage blocks in the index table by using the characteristic parameter; and loading the storage blocks into a memory space of a working processor; where the index table contains mapping relationships between block identifiers of sensor data storage blocks and characteristic attributes of sensor data.

Abstract: A mechanism, configured for positioning a work piece, includes a support member and a position assembly. The position assembly includes a guiding member and a positioning sleeve sleeved on the guiding member. The guiding member detachably is coupled to the support member. The positioning sleeve is detachably coupled to the support member. The guiding member is partially exposed from the positioning sleeve.

Abstract: The present invention relates to a switch monitoring method and a switch monitoring system, a railway line management method and a railway line management system. Electric signal of a switch motor during pulling of the switch can effectively reflect status of the switch, when the switch is in a stable state, electric signal of its motor is very steady during pulling of the switch; however, when the switch is in an unstable state, there will be different degrees of fluctuation in electric signal of its motor during pulling of the switch. Thus, the invention may be used to identify state of a switch by monitoring electric signal of a switch motor, and further take different measures based on different states of the switch. With these measures, accidents due to switch failure may be effectively reduced, and train delay time may also be reduced through proper line management.

Abstract: The present invention relates to a switch monitoring method and a switch monitoring system, a railway line management method and a railway line management system. Electric signal of a switch motor during pulling of the switch can effectively reflect status of the switch, when the switch is in a stable state, electric signal of its motor is very steady during pulling of the switch; however, when the switch is in an unstable state, there will be different degrees of fluctuation in electric signal of its motor during pulling of the switch. Thus, the invention may be used to identify state of a switch by monitoring electric signal of a switch motor, and further take different measures based on different states of the switch. With these measures, accidents due to switch failure may be effectively reduced, and train delay time may also be reduced through proper line management.

Abstract: A system, a method and a server for downloading installation package are provided. The method for downloading installation package comprises the steps of receiving request information for downloading installation package from a hardware client, acquiring the installation package and a dynamic link library related to the installation package upon the receipt of the request information for downloading the installation package, compiling the dynamic link library that has been acquired to reduce a size of the dynamic link library, packing the dynamic link library and the installation package, wherein the size of the dynamic link library has been reduced, and transmitting the dynamic link library and the installation package to the hardware client.

Abstract: An electrical connector, for mating a mating connector having two metal elastic sheets, includes: an insulation body having a base portion and a tongue located at a front end thereof; an upper and lower rows of terminals fixed to the base portion, each terminal having a contact portion exposed from an upper or lower surface of the tongue; a middle shielding sheet, fixed to the base portion and tongue, and located between the two terminal rows; two snap-fit portions disposed at two sides of the middle shielding sheet and exposed from two sides of the tongue, where the two metal elastic sheets buckle the snap-fit portions to prevent disengagement; and an outer metal casing wrapping peripheries of the base portion and tongue. When the mating connector is inserted into the electrical connector after it's assembling, the two snap-fit portions are fixed to the mating connector to ensure stable high-frequency performance.

Abstract: A method of querying spatial events in a vehicle network includes receiving, by a processing device, a query condition of a user; in response to reception of the query condition of the user, determining context information of a position where the user locates; and according to the query condition of the user and the context information of the position where the user locates, querying an index table recording correspondence between terminal nodes of roads in a road map and spatial events to obtain spatial events meeting the query condition of the user.

Abstract: A method is provided for accessing an audio/video community virtual room. The method includes receiving a trigger request on a link address corresponding to a visual room identifier displayed on a group webpage. A corresponding relationship exists between the visual room identifier and a group identifier. The method also includes starting an audio/video community application program to enter a virtual room interactive interface of the link address corresponding to the visual room identifier according to the trigger request.

Abstract: A positioning device includes a fixing mechanism, a first positioning assembly, a second positioning assembly. The fixing mechanism includes a base, a first moving member movably passing through the base, and a second moving member movably passing through the base. The first positioning assembly includes a bottom board and two first guide portions protruding from the bottom board. Each first guide portion forms one first incline surface. The second positioning assembly includes a base body and two second guide portions. The base body is positioned between the two first guide portions respectively positioned on opposite side surfaces of the base body. Each second guide portion forms a guiding surface. The first moving member is fixed with the bottom board at one end away from the base. The second moving member is fixed with the base body at one end away from the base.