Abstract: A conversion device includes a primary side circuit, a secondary side circuit, a transformer, and a control circuit. The primary side circuit includes a primary side switch and is configured to receive an input voltage. The secondary side circuit outputs an output voltage to a load. The transformer comprises a primary winding and a secondary winding, the primary winding is electrically coupled to the primary side circuit and the secondary winding electrically coupled to the secondary side circuit. The control circuit is configured to control a peak value of the current of the primary side switch, to be limited in a band range.

Abstract: An ultrasound scanning control method applied to an ultrasound scanning device is provided. The ultrasound scanning device includes an execution mechanism. The execution mechanism includes a mechanical arm and a probe. The ultrasound scanning control method includes controlling the mechanical arm to drive the probe to move according to a set scanning trajectory for performing an ultrasound scanning detection on a part to be examined. Once an actual pressure value between the probe and the part to be examined in each control cycle is sensed using the force sensor, a pressure value between the probe and the part to be examined is controlled to be a constant value based on the actual pressure value.

Abstract: Systems and methods for modeling petroleum reservoir properties using a gridless reservoir simulation model are provided. Data relating to geological properties of a reservoir formation is analyzed. A tiered hierarchy of geological elements within the reservoir formation is generated at different geological scales, based on the analysis. The geological elements at each of the different geological scales in the tiered hierarchy are categorized. Spatial boundaries between the categorized geological elements are defined for each of the geological scales in the tiered hierarchy. A scalable and updateable gridless model of the reservoir formation is generated, based on the spatial boundaries defined for at least one of the geological scales in the tiered hierarchy.

Abstract: A method may comprise: modeling a complex fracture network within the subterranean formation with a mathematical model based on a natural fracture network map and measured data of the subterranean formation collected in association with a fracturing treatment of the subterranean formation to produce a complex fracture network map; importing microseismic data collected in association with the fracturing treatment of the subterranean formation into the mathematical model; identifying directions of continuity in the microseismic data via a geostatistical analysis that is part of the mathematical model; and correlating the directions of continuity in the microseismic data to the complex fracture network with the mathematical model to produce a microseismic-weighted (MSW) complex fracture network map.

Abstract: Systems and methods for modeling petroleum reservoir properties using a gridless reservoir simulation model are provided. Data relating to geological properties of a reservoir formation is analyzed. A tiered hierarchy of geological elements within the reservoir formation is generated at different geological scales, based on the analysis. The geological elements at each of the different geological scales in the tiered hierarchy are categorized. Spatial boundaries between the categorized geological elements are defined for each of the geological scales in the tiered hierarchy. A scalable and updateable gridless model of the reservoir formation is generated, based on the spatial boundaries defined for at least one of the geological scales in the tiered hierarchy.

Abstract: The selection of a candidate formation realization(s) from a plurality of formation realizations may be done with a classification and regression tree (CART) analysis taking into account petrophysical and geological properties. For example, a method may include applying a CART analysis to a plurality of formation realizations using a first formation property as a predictor in the CART analysis, wherein the plurality of formation realizations are for a second formation property and are based on at least one measured formation property, thereby yielding an association between the first and second properties for each of the plurality of formation realizations; analyzing a strength of the association for each of the plurality of formation realizations; and selecting a candidate formation realization from the plurality of formation realizations based on the strength of the association. The identified candidate formation realization(s) may then be used to develop the parameters of subsequent wellbore operations.

Abstract: A method may include drilling a deviated wellbore penetrating a subterranean formation according to bottom hole assembly parameters and surface parameters; collecting real-time formation data during drilling; updating a model of the subterranean formation based on the real-time formation data and deriving formation properties therefrom; collecting survey data corresponding to a location of a drill bit in the subterranean formation; deriving a target well path for the drilling based on the model of the subterranean formation; deriving a series of trajectory well paths based on the formation properties, the survey data, the bottom hole assembly parameters, and the surface parameters and uncertainties associated therewith; deriving an actual well path based on the series of trajectory well paths; deriving a deviation between the target well path and the actual well path; and adjusting the bottom hole assembly parameters and the surface parameters to maintain the deviation below a threshold.

Abstract: A method may comprise: modeling a complex fracture network within the subterranean formation with a mathematical model based on a natural fracture network map and measured data of the subterranean formation collected in association with a fracturing treatment of the subterranean formation to produce a complex fracture network map; importing microseismic data collected in association with the fracturing treatment of the subterranean formation into the mathematical model; identifying directions of continuity in the microseismic data via a geostatistical analysis that is part of the mathematical model; and correlating the directions of continuity in the microseismic data to the complex fracture network with the mathematical model to produce a microseismic-weighted (MSW) complex fracture network map.

Abstract: A method may include drilling a deviated wellbore penetrating a subterranean formation according to bottom hole assembly parameters and surface parameters; collecting real-time formation data during drilling; updating a model of the subterranean formation based on the real-time formation data and deriving formation properties therefrom; collecting survey data corresponding to a location of a drill bit in the subterranean formation; deriving a target well path for the drilling based on the model of the subterranean formation; deriving a series of trajectory well paths based on the formation properties, the survey data, the bottom hole assembly parameters, and the surface parameters and uncertainties associated therewith; deriving an actual well path based on the series of trajectory well paths; deriving a deviation between the target well path and the actual well path; and adjusting the bottom hole assembly parameters and the surface parameters to maintain the deviation below a threshold.

Abstract: The selection of a candidate formation realization(s) from a plurality of formation realizations may be done with a classification and regression tree (CART) analysis taking into account petrophysical and geological properties. For example, a method may include applying a CART analysis to a plurality of formation realizations using a first formation property as a predictor in the CART analysis, wherein the plurality of formation realizations are for a second formation property and are based on at least one measured formation property, thereby yielding an association between the first and second properties for each of the plurality of formation realizations; analyzing a strength of the association for each of the plurality of formation realizations; and selecting a candidate formation realization from the plurality of formation realizations based on the strength of the association. The identified candidate formation realization(s) may then be used to develop the parameters of subsequent wellbore operations.

Abstract: A computing device facilitates the organization of a plurality of three-dimensional geological data realizations into respective one-dimensional arrays of geological property values, with each geological property value corresponding to a three-dimensional grid location of a respective three-dimensional geological data realization. The computing device then facilitates the grouping of the one-dimensional arrays into two or more array clusters based on a comparison of geometric locations of the geological property values within the respective arrays, and selects at least one of the plurality of three-dimensional geological data realizations for each of the two or more array clusters. The selected data realizations are then provided at a user interface.

Abstract: A computing device facilitates the organization of a plurality of three-dimensional geological data realizations into respective one-dimensional arrays of geological property values, with each geological property value corresponding to a three-dimensional grid location of a respective three-dimensional geological data realization. The computing device then facilitates the grouping of the one-dimensional arrays into two or more array clusters based on a comparison of geometric locations of the geological property values within the respective arrays, and selects at least one of the plurality of three-dimensional geological data realizations for each of the two or more array clusters. The selected data realizations are then provided at a user interface.

Abstract: A method of communication between a transmitter and a receiver over a channel is provided. The transmitter is capable of transmitting packets with multiple data rates, each of which adapts to a respective channel condition with regards to the performance of the communication. The method comprises the steps of at the level of the transmitter: upon detection of a disappearance of deterioration of the channel condition, transmitting packets with a data rate selected from a group of stable data rates that are stably used before the disappearance of the deterioration but larger than the last data rate before disappearance of the deterioration.

Abstract: A chip card connector includes a housing and a plurality of terminals. The housing has a partition part and a plurality of openings formed on two sides of the partition part. The terminals are disposed in the openings. Each of the terminals has a first end embedded in or movably attached to the partition part, a second end penetrating a side surface of the housing and exposed from the housing, and a protruding contact part disposed between the first and second end for making contact with a chip card. Therefore, the problem of the prior art is solved that a chip card is likely to hook the contact part pf a conventional chip card connector that has the contact part extending from a cantilever of a terminal when the chip card is plugged into or unplugged from the chip card connector and the terminal are easily deformed or damaged.

Abstract: The present invention discloses a subscriber identity module connector which places a detecting terminal and a grounding terminal into a same contact area. The above placement of the detecting terminal and the grounding terminal form a circuit to determine if a SIM card is inserted appropriately. As a result, there is no need to set conventional detecting unit, and the space of the subscriber identity module connector are advantageously saved. It not only simplifies the placement of circuit board (PCB) and but also reduces the manufacturing cost.

Abstract: The present invention discloses a subscriber identity module connector which places a detecting terminal and a grounding terminal into a same contact area. The above placement of the detecting terminal and the grounding terminal form a circuit to determine if a SIM card is inserted appropriately. As a result, there is no need to set conventional detecting unit, and the space of the subscriber identity module connector are advantageously saved. It not only simplifies the placement of circuit board (PCB) and but also reduces the manufacturing cost.

Abstract: A chip card connector includes a housing and a plurality of terminals. The housing has a partition part and a plurality of openings formed on two sides of the partition part. The terminals are disposed in the openings. E ach of the terminals has a first end embedded in or movably attached to the partition part, a second end penetrating a side surface of the housing and exposed from the housing, and a protruding contact part disposed between the first and second end for making contact with a chip card. Therefore, the problem of the prior art is solved that a chip card is likely to hook the contact part pf a conventional chip card connector that has the contact part extending from a cantilever of a terminal when the chip card is plugged into or unplugged from the chip card connector and the terminal are easily deformed or damaged.

Abstract: A method of communication between a transmitter and a receiver over a channel is provided. The transmitter is capable of transmitting packets with multiple data rates, each of which adapts to a respective channel condition with regards to the performance of the communication. The method comprises the steps of at the level of the transmitter: upon detection of a disappearance of deterioration of the channel condition, transmitting packets with a data rate selected from a group of stable data rates that are stably used before the disappearance of the deterioration but larger than the last data rate before disappearance of the deterioration.

Abstract: The present invention relates a bidirectional signal transmission apparatus and method, wherein said apparatus comprises a processor unit connected in signal communication with an Ethernet, an RF modulation/demodulation unit, and an RF frequency conversion unit connected in signal communication with a coaxial cable network. The data signal input from the Ethernet is modulated into standard IEEE802.11 signal by means of said signal processing unit and RF modulation/demodulation unit, and then down-converted from 2.4 GHz or 5.8 GHz standard IEEE802.11 signal to a range of 500 MHz to 2000 MHz, and preferably to a range of 900 MHz to 1200 MHz. The bidirectional transmission apparatus further includes a frequency band selector for selecting different frequency bands so as to broaden the bandwidth of the signal and a real broad band data transmission is accomplished.

Abstract: An ejection device is manufactured independently from but implemented with a subscriber identification module (SIM) connector comprising an insulative housing and a tray having a SIM card mounted therein and has a bracket, a push button, a link and an ejection lever. The push button is mounted slidably on the bracket. The link is mounted slidably on the bracket and is connected with the push button. The ejection lever is mounted pivotally to the bracket, is connected with the link and selectively pushes the SIM card out of the tray. The ejection device may be pre-fabricated or formed with the connector so can be easily retrofitted to current designs or added simply to any SIM card connector and greatly facilitates SIM card removal while benefiting from reduced production costs from simplification and greater economies of scale.