Abstract: A computer-implemented method dynamically switches access plans for a query during concurrent query execution. The method includes receiving a first query configured to be processed by a database system. The method also includes generating, for the first query, an access plan for each of identified resource sets. The method includes determining a first set of available resources that represent an available capacity for the database system. The method further includes selecting a first resource set of the one or more resource sets, where the selecting is based on the first set of available resources being closest to the first resource set. The method also includes selecting, based on the first set of available resources, a first access plan of the one or more access plans. The method includes executing the first query and returning results of the first query to a source of the first query.

Abstract: A method for making a composite carbon nanotube structure is introduced. The method includes the following steps. A carbon nanotube structure and a polymer are provided. The polymer and the carbon nanotube structure are composited together. The composite carbon nanotube structure composited with polymer and the carbon nanotube is then graphitized.

Abstract: A method for making a composite carbon nanotube structure is introduced. The method includes the following steps. A carbon nanotube structure and a polymer are provided. The polymer and the carbon nanotube structure are composited together. The composite carbon nanotube structure composited with polymer and the carbon nanotube is then graphitized.

Abstract: A method for making a composite carbon nanotube structure is introduced. The method includes the following steps. A carbon nanotube structure and a polymer are provided. The polymer and the carbon nanotube structure are composited together. The composite carbon nanotube structure composited with polymer and the carbon nanotube is then graphitized.

Abstract: A method for making a composite carbon nanotube structure includes the following steps. An organic solvent, a polymer, and a carbon nanotube structure are provided. The polymer is dissolved in the organic solvent to obtain a polymer solution. The carbon nanotube film structure is soaked with the polymer solution. A contact angle between the organic solvent and a carbon nanotube is less than 90 degrees.

Abstract: A pacemaker lead includes a body and an insulation layer. The body includes at least one carbon nanotube yarn. The at least one carbon nanotube yarn includes a plurality of carbon nanotubes. The carbon nanotubes are interconnected along an axis of the body by van der Waals force. The insulation layer covers an outer surface of the body.

Abstract: A composite carbon nanotube structure includes a carbon nanotube film structure and a graphite structure. The carbon nanotube structure defines a number of micropores therein. The graphite structure and the carbon nanotube film structure are composited together. The graphite structure comprising a number of graphite segments filled in the micropores.

Abstract: A surface-enhanced Raman scattering substrate includes a carbon nanotube film structure and a plurality of metallic particles disposed on the carbon nanotube film structure. The carbon nanotube film structure includes a number of carbon nanotubes joined by van der Waals attractive force therebetween. The carbon nanotube film structure is a free-standing structure.

Abstract: An optical fiber probe includes an optical fiber, a carbon nanotube film structure, and a number of metallic particles. The optical fiber includes a detecting end. The carbon nanotube film structure is located on a surface of the detecting end. The carbon nanotube film structure includes a number of carbon nanotubes joined by van der Waals attractive force therebetween. The metallic particles are located on outer surfaces of the carbon nanotubes.

Abstract: The present invention relates to a method for making a twisted carbon nanotube wire. Two opposite ends of the at least one carbon nanotube film is clamped by two clamps. The two clamps is pulled along two reversed directions to stretch the at least one carbon nanotube film. The at least one carbon nanotube film is twisted by rotating the two clamps while the at least one carbon nanotube film is in a straightening state.

Abstract: A pacemaker includes a pulse generator, a conduction line, and a pacemaker electrode. The pacemaker electrode includes a body and an insulation layer. The body includes at least one carbon nanotube yarn. The carbon nanotube yarn includes a number of carbon nanotubes. The carbon nanotubes are interconnected along one axis of the body by van der Waals force. The insulation layer covers an outer surface of the body.

Abstract: The present disclosure relates to a method for making a transparent carbon nanotube composite film. The method includes: (a) providing a transparent carbon nanotube film structure; (b) fixing the transparent carbon nanotube film structure on a supporting; (c) immersing the transparent carbon nanotube film structure with the supporting into a transparent polymer solution; and (d) removing the transparent carbon nanotube film structure with the supporting from the transparent polymer solution, thereby forming the transparent carbon nanotube composite film. A light transmittance of the transparent carbon nanotube composite film structure is higher than a light transmittance of the transparent carbon nanotube film structure.

Abstract: A method for making a carbon nanotube structure is introduced. The method includes the following steps. A carbon nanotube precursor including a number of carbon nanotubes is provided. The carbon nanotube precursor is placed in a chamber with low oxygen environment. The carbon nanotube precursor is heated in the chamber.

Abstract: A method for making a composite carbon nanotube structure includes the following steps. An organic solvent, a polymer, and a carbon nanotube structure are provided. The polymer is dissolved in the organic solvent to obtain a polymer solution. The carbon nanotube structure is soaked with the polymer solution. A contact angle between the organic solvent and a carbon nanotube is less than 90 degrees.

Abstract: A method for manufacturing a carbon nanotube film, comprises providing a carbon nanotube array and a drawing tool, positioning the drawing tool close to the carbon nanotube array and selecting some carbon nanotubes of the carbon nanotube array, and drawing the selected carbon nanotubes away from the carbon nanotube array along a drawing direction at a drawing angle, thereby forming the carbon nanotube film. The drawing angle is an angle of inclination between the drawing direction and the growth direction. The drawing angle is less than or equal to 80 degrees.

Abstract: A Raman detecting system for detecting a vapor of an explosive includes a surface-enhanced Raman scattering substrate for absorbing the vapor of the explosive. The substrate includes a carbon nanotube film structure and a plurality of metallic particles disposed on the carbon nanotube film structure. The carbon nanotube film structure includes a plurality of stacked carbon nanotube films.

Abstract: A carbon nanotube structure includes a number of carbon wires and a number of second carbon nanotubes. Each of the carbon nanotube wires includes a number of first carbon nanotubes joined end to end by the carbon-carbon bonds therebetween. The carbon wires and the carbon nanotubes are joined by van der Waals attractive force therebetween.

Abstract: The present disclosure relates to a method for making a transparent carbon nanotube composite film. The method includes: (a) providing a transparent carbon nanotube film structure; (b) fixing the transparent carbon nanotube film structure on a supporting; (c) immersing the transparent carbon nanotube film structure with the supporting into a transparent polymer solution; and (d) removing the transparent carbon nanotube film structure with the supporting from the transparent polymer solution, thereby forming the transparent carbon nanotube composite film. A light transmittance of the transparent carbon nanotube composite film structure is higher than a light transmittance of the transparent carbon nanotube film structure.

Abstract: A carbon nanotube composite includes a free-standing carbon nanotube structure and an amount of reinforcements. The free-standing carbon nanotube structure includes an amount of carbon nanotubes. The reinforcements are located on the carbon nanotubes and combining the carbon nanotubes together.

Abstract: A method for manufacturing a carbon nanotube film, comprises providing a carbon nanotube array and a drawing tool, positioning the drawing tool close to the carbon nanotube array and selecting some carbon nanotubes of the carbon nanotube array, and drawing the selected carbon nanotubes away from the carbon nanotube array along a drawing direction at a drawing angle, thereby forming the carbon nanotube film. The drawing angle is an angle of inclination between the drawing direction and the growth direction. The drawing angle is less than or equal to 80 degrees.