摘要:
Aligned multi-walled carbon nanotubes were grown on both sides of a metallic or metal-coated substrate by water vapor-assisted chemical vapor deposition. Aligned carbon nanotube films of thickness ranging from 1 μm to over 100 μm were obtained. By manipulating various operating factors—position of substrate in the reactor, amount of water vapor, amount of catalyst, reactor temperature, and growth time, the morphology and thickness of these carbon nanotube films could be adjusted.
摘要:
The present invention discloses a series of cardo-polybenzoxazole copolymer membranes, methods for preparing the cardo-polybenzoxazole copolymer membrane from thermal rearrangement of cardo-copolyimide membranes, and methods of methods for the separation of a fluid from a mixture of fluids by utilizing the cardo-polybenzoxazole copolymer membrane.
摘要:
A composition used for high-strength impermeable concrete. The composition contains sand, stone, cement, water reducer, water and reinforced impermeable sand. The reinforced impermeable sand includes aeolian sand and binder covering the surface of the aeolian sand. The reinforced impermeable sand can fill the gap between the sand and the stone, and well combine various components in the composition, and suppress the seepage phenomenon of the molded concrete, thereby greatly improving the strength and impermeability of the concrete.
摘要:
Embodiments of the present invention provide a method, a server, and a system for implementing a video-based value-added service. The method includes: acquiring, by an event server, association event data which corresponds to a video currently played by a first client; when detecting an event trigger condition, generating, by the event server, an event notification according to the association event data, and sending the event notification to an application server; forming, by the application server, value-added service content according to preset value-added service data and event data in the event notification, and providing the value-added service content for a second client.
摘要:
A method, apparatus and system for obtaining user information are disclosed by the present invention. The present invention solves the problem of lower security of user information. The method includes: obtaining the interactive state of the service requester in the service request process, wherein the interactive state is used for indicating the specific state in which the service requester and its service are during the process of interaction with each other; determining if the interactive state of the service requester, in the process of requesting the service, meets the preset access-authorized-policy of the user information in the service request; when the interactive state of the service requester, in the process of requesting the service, meets the preset access-authorized-policy of the user information in said service request, obtaining the user information and sending the user information to the service.
摘要:
The present invention relates to a method comprising reducing a ketone of formula I: with an enantioselective hydrogenating agent to form substantially enantiomerically pure alcohol of formula II: where R—R4 and m are as defined herein. The method of the present invention is useful for making CCR2 modulators as wells as precursors CCR2 modulators.
摘要:
An XMPP server in a home domain that an XMPP client belongs to receives a service access request over XMPP; the XMPP server selects a routing path for the service access request, and forwards the service access request to a next hop XMPP server according to the selected routing path, and forwards the service access request in turn, to an XMPP gateway connected to a service server; after the XMPP gateway receives the service access request, the XMPP gateway invokes the service server to obtain a service access response, and forwards the service access response to the XMPP server in the home domain that the XMPP client belongs to; the XMPP server in the home domain that the XMPP client belongs to sends the service access response to the XMPP client.
摘要:
A packaged semiconductor device is assembled using a first lead frame upon which a die is mounted and encapsulated and a second lead frame that provides bent leads for the device. By using two different lead frames, an array of the first lead frames can be configured with more lead frames for more devices than a comparably sized lead frame array of the prior art because the first lead frame array does not need to provide the leads for the packaged devices. Instead, the leads are provided by the second lead frame array, which can be attached to the first lead frame array after the dies have been mounted and encapsulated on the first lead frame array.