Abstract: A downhole throttling device based on wireless control includes an inlet nozzle, a throttling assembly, an electrical sealing cylinder, a gas guide cylinder, a lower adapter sleeve, an end socket, a female sleeve, and electrical components. The inlet nozzle is connected to the throttling assembly, the throttling assembly is connected to the electrical sealing cylinder and the gas guide cylinder, the electrical sealing cylinder and the gas guide cylinder are both connected to the lower adapter sleeve, the lower adapter sleeve is respectively connected to the end socket and the female sleeve, and the electrical components are arranged in the electrical sealing cylinder. A throttling effect is achieved by detecting the temperature and pressure in a tube by a temperature/pressure sensor in the electrical components and controlling a motor to rotate a movable valve in the throttling assembly by a circuit control assembly, thereby achieving wireless control over downhole throttling.

Abstract: A method for determining a productivity of a coalbed methane well without shutting down the well includes steps of: obtaining coalbed methane basic data; based on PVT experimental data, determining a relationship table between a pressure and a coalbed methane deviation factor, and a relationship table between the pressure and a pseudo-pressure; recording daily gas production rates, bottomhole flow pressures, and cumulative gas productions at each stabilized flow pressure test moment in at least three different production stages; determining formation pressures corresponding to each stabilized flow pressure test moment based on a material balance equation; according to the formation pressures, the bottomhole flow pressures and the production rates, determining coefficients in a deliverability equation of the coalbed methane well for determining the deliverability equation; substituting the formation pressures and the bottomhole flow pressures into the deliverability equation for obtaining corresponding product

Abstract: The present disclosure provides a method of manufacturing a semiconductor structure. The method includes providing a substrate; forming a fin structure on the substrate; forming a first dummy gate on the fin structure; forming a trench to penetrate the first dummy gate and the fin structure; forming a dielectric stack in the trench; removing a top portion of the dielectric stack in the trench to leave a lower portion of the dielectric stack in the trench; and forming a protective layer in the trench and directly on the lower portion of the dielectric stack.

Abstract: A method for preparing a magic-sized nano-crystalline substance, wherein a component containing at least one metal element of groups IIB, IIIA and IVA in the periodic table, and a component containing at least one non-metal element of groups VIA and VA are used as raw materials. In a reaction system for preparing a conventional nano-crystalline substance and in an inert gas atmosphere, after heating the reaction, reactants are cooled to a temperature 50% lower than the actual heating temperature of the reaction thereof, and after standing, the target product of the magic-sized nano-crystalline substance is obtained. The required pure target product can be obtained by the preparation method.

Abstract: The present application provides methods and systems for limiting data traffic. According to some embodiments, one exemplary method includes: determining, at an application layer, one or more parent process objects corresponding to a service object; creating at least one corresponding child process object by using the parent process objects respectively, and allocating a maximum input/output (I/O) bandwidth threshold for the child process object and prompting, when it is detected that the child process object inputs or outputs a network data packet, an operating system kernel layer to limit data traffic of the network data packet according to the maximum I/O bandwidth threshold. Embodiments of the present application can improve the stability of network isolation.

Abstract: A method for preparing a magic-sized nano-crystalline substance, wherein a component containing at least one metal element of groups IIB, IIIA and IVA in the periodic table, and a component containing at least one non-metal element of groups VIA and VA are used as raw materials. In a reaction system for preparing a conventional nano-crystalline substance and in an inert gas atmosphere, after heating the reaction, reactants are cooled to a temperature 50% lower than the actual heating temperature of the reaction thereof, and after standing, the target product of the magic-sized nano-crystalline substance is obtained. The required pure target product can be obtained by the preparation method.

Abstract: The present application provides methods and systems for limiting data traffic. According to some embodiments, one exemplary method includes: determining, at an application layer, one or more parent process objects corresponding to a service object; creating at least one corresponding child process object by using the parent process objects respectively, and allocating a maximum input/output (I/O) bandwidth threshold for the child process object and prompting, when it is detected that the child process object inputs or outputs a network data packet, an operating system kernel layer to limit data traffic of the network data packet according to the maximum I/O bandwidth threshold. Embodiments of the present application can improve the stability of network isolation.

Abstract: A method of synthesizing colloidal semiconductor nanocrystals involves contacting a source of at least one semiconductor cation element (Group 11-14, more preferably Group 12-14, more preferably 12 or 14, more preferably Cd, Zn, Hg or Pb, most preferably Cd) with a source of at least one Group 15, or 16 element in the presence of a ligand forming compound containing a carboxylic acid moiety in a reaction medium comprising a solvent that is substantially noncoordinating with respect to the at least one cation, the ligand forming compound and the source of at least one cation element having a molar ratio of 1:1 or less. The cation element source is preferably bonded to two low carbon acids. Some of the low carbon acids are substituted with the ligand forming compound to produce a cation precursor that is more soluble in the noncoordinating solvent.

Abstract: A method of synthesizing colloidal semiconductor nanocrystals involves contacting a source of at least one semi-conductor cation element (Group 11-14, more preferably Group 12-14, more preferably 12 or 14, more preferably Cd, Zn, Hg or Pb, most preferably Cd) with a source of at least one Group 15, or 16 element in the presence of a ligand forming compound containing a carboxylic acid moiety in a reaction medium comprising a solvent that is substantially noncoordinating with respect to the at least one cation, the ligand forming compound and the source of at least one cation element having a molar ratio of 1:1 or less. The cation element source is preferably bonded to two low carbon acids. Some of the low carbon acids are substituted with the ligand forming compound to produce a cation precursor that is more soluble in the noncoordinating solvent.

Abstract: The invention is the novel use of Quantum Dots (QDs) for radiation dosimetry and includes novel dosimetry devices, systems and methods. The devices, systems and methods have use in a variety of dosimetry applications such as personal, environmental and research. The system for detecting doses of ionizing radiation comprises; a matrix comprising a photoluminescent semiconductor nanocrystals; an illumination interface for exposing the matrix to non-ionizing radiation; a response characterization interface for measuring photoluminescence, scatter or the optical density of the matrix and identifying differences in the photoluminescence, scatter or optical density caused by exposure to ionizing radiation; and a readout interface to quantify the photoluminescence or optical density differences as doses of radiation.

Abstract: A method of synthesizing colloidal semiconductor nanocrystals involves contacting a source of at least one semi-conductor cation element (Group 11-14, more preferably Group 12-14, more preferably 12 or 14, more preferably Cd, Zn, Hg or Pb, most preferably Cd) with a source of at least one Group 15, or 16 element in the presence of a ligand forming compound containing a carboxylic acid moiety in a reaction medium comprising a solvent that is substantially noncoordinating with respect to the at least one cation, the ligand forming compound and the source of at least one cation element having a molar ratio of 1:1 or less. The cation element source is preferably bonded to two low carbon acids. Some of the low carbon acids are substituted with the ligand forming compound to produce a cation precursor that is more soluble in the noncoordinating solvent.

Abstract: The invention is the novel use of Quantum Dots (QDs) for radiation dosimetry and includes novel dosimetry devices, systems and methods. The devices, systems and methods have use in a variety of dosimetry applications such as personal, environmental and research. The system for detecting doses of ionizing radiation comprises; a matrix comprising a photoluminescent semiconductor nanocrystals; an illumination interface for exposing the matrix to non-ionizing radiation; a response characterization interface for measuring photoluminescence, scatter or the optical density of the matrix and identifying differences in the photoluminescence, scatter or optical density caused by exposure to ionizing radiation; and a readout interface to quantify the photoluminescence or optical density differences as doses of radiation.

Abstract: A method of performing high repetition rate laser time domain imaging employs as fluoroprobes semiconductor nanocrystals having a fluorescence lifetime less than the laser pulse separation, typically less than 5 ns. The nanocrystals of the invention have a core/shell structure and may be surface treated to increase radiative decay. CdSe/Zns nanocrystals are particularly suitable.

Abstract: A method of making nanocrystals involves adding a chalocogen source to a hot solution of a metal-containing non-organometallic compound, such as CdO, in a first ligand solvent, such as TOP, and preferably subsequently cooling the resulting mixture to a lower temperature to grow the nanocrystals at said lower temperature. The method can involve either one ligand or two-ligand systems.

Abstract: The present invention is in the field of polymer sheets comprising poly(vinyl butyral) and sodium acetate and methods of producing and using the same, and more specifically, the present invention is in the field of polymer sheets comprising plasticized poly(vinyl butyral), sodium acetate, and an adhesion control agent.

Abstract: A method of making nanocrystals involves adding a chalocogen source to a hot solution of a metal-containing non-organometallic compound, such as CdO, in a first ligand solvent, such as TOP, and preferably subsequently cooling the resulting mixture to a lower temperature to grow the nanocrystals at said lower temperature. The method can involve either one ligand or two-ligand systems.

Abstract: A double track type wire arranging device for winding machines including a transmission device, a winding device, a direction change device, a reciprocating device, a support device, and a driven device. When the transmission device is started, it may respectively actuate the winding device and the direction change device. The direction change device in turn rotates a rotary wheel of the reciprocating device, forcing slide posts below the rotary wheel to displace back and forth in curved slide grooves, so that a swing rod connected to a lower portion of the reciprocating device swings through a sector with the support device as pivot. The action of the swing rod causes the driven device at one side of the reciprocating device to displace through a larger sector, so that wire arranging wheels at an outer end of the driven device reciprocate to wind wire on a winding disk shaft in an alternate manner.

Abstract: An umbrella type quick wire removal device for winding machines including a shaft, a shaft collar, an umbrella type pawl mechanism, an inner annular plate, a take mechanism, and an outer annular plate. The device is characterized in that, when the take mechanism is pulled outwardly along the direction of a main shaft of the shaft after the winding operation, guide wheels in base rods of the pawl mechanism lose support of a securing seat so that the base rods retract inwardly using the holes of the corresponding shaft brackets to allow removal of the wound wire. The pawl mechanism may be connected to wire guide so that an end of the bundle of wound wire may be passed out through a through hole for easy pulling of the wire.

Abstract: A releasable cable holder assembly including pairs of pawl devices mounted on the winding wheel of a winding machine for winding a cable, and a knock-out control mechanism controlled to release the pawl devices from the finished winding of cable, wherein each pawl device includes a front holder plate and a rear holder plate fastened in an elongated slot on the winding wheel at two opposite sides, a spring-supported pawl fastened to a respective L-shaped through hole on each holder plate, and two wheels mounted in the L-shaped through holes of the holder plates at different elevations and disposed in contact with the spring-supported pawl at two opposite sides for guiding the pawl into a tilted position to release the winding of cable when the pawl devices are forced forwards by the knock-out control mechanism.