Beijing Oriental Yuhong Waterproof Technology Co. Ltd.

Beijing Aerospace Wanda Hi-tech Ltd.

Xiaobin Liu

Wei Guo

Willie Lau

Joseph Martin Rokowski

Shulun Zhao

Jizhuo Men

Zhenping He

Rong Lang

Guang Han

Chunxiang Yang

Qingbo Yu

Provided are highly water-resistant, flexible cementitious coating compositions comprising: an aqueous styrene-butadiene latex, one or more epoxy silane, cement, and one or more solid filler. The epoxy silane may comprise one or more epoxy functional groups and one or more hydrolysable functional groups selected from siloxy, silane, and, silanol or combinations thereof. Also provided are kits comprising the components of the cementitious coating compositions, methods for providing coatings, layers or membranes derived from such wet compositions, as well as the coatings, layers or membranes derived therefrom.

Highly water-resistant, flexible cementitious coating

A method for controlling an antenna of a mobile communication application system based on double quaternions in MEMS inertial navigation. The method comprises: introducing an antenna control quaternion based on a navigation attitude quaternion; in each interrupt cycle of a navigation computer, updating the two quaternions respectively using a carrier system measured by a gyroscope relative to a rotation vector of an ideal platform coordinate system; in each filter cycle, correcting the error of the navigation attitude quaternion respectively using a Kalman filter; according to the relationship between the attitudes determined by the two attitude quaternions, determining the angular speed in an antenna control instruction; and finally, driving a servo system to rotate at an antenna servo control angle converted by an antenna control quaternion attitude.

Method and system for controlling antenna of mobile communication application system based on double quaternions in MEMS inertial navigation

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Beijing, China

Xiaobin Liu