The Procter Gamble Company

Tsinghua University

State Grid Jibei Electric Power Company Limited

State Grid Beijing Electric Power Company

Guannan Wang

Ross Strand

Yunming Shi

Yang Su

Thanigaivel Shanmugam

Bin Wang

Qinglai Guo

Hongbin Sun

Wenchuan Wu

Haitao Liu

Xiaoxiao Li

Qi Wang

Shikhar Gupta

Xiaowei Li

Yanling Du

Jun Zhang

Chenhui Lin

Huaichang Ge

Hongquan Ji

Ziang Liu

Xijuan Yu

Mang Jiang

Leave-on oral care compositions including a hyaluronic acid or a salt thereof good spreadability and improved retention period are provided for promoting Gum Health of a user. Kits and methods are also provided.

Leave-on oral care compositions

An oral care composition with a tin, polyol with five or six carbon atoms, polyol with seven or more hydroxyl functional groups, and a pH of greater than 7. An oral care composition with a tin ion source, a fluoride ion source, a polyol with five or six carbon atoms, a non reducing sugar or sugar alcohol with seven or more hydroxyl functional groups, and a pH of greater than 7. Oral care compositions with a high tin ion availability.

Oral care compositions comprising tin ions

Leave-on oral care compositions having good spreadability and improved retention property are provided for promoting Gum Health of a user. Leave-on oral care compositions can comprise a hyaluronic acid or a salt thereof, a polyacrylic acid as a mucoadhesive polymer, and an additional polymer.

An online voltage control method for coordinating multi-type reactive power resources is provided. First, a linearized power flow equation of branch reactive power is established, and an online voltage control model of multi-type reactive power resources including an objective function and constraint conditions is constructed. The constraint conditions includes generator reactive power constraints, reactive power compensator constraints, transformer tap position constraints, a nodal reactive power balance constraint, and slack contained nodal voltage constraints. Then, an optimization result of voltage control is obtained by solving the model. The method makes full use of reactive voltage operation characteristics of a power grid, constructs a practical online solution model for reactive voltage control of large power grid of coordinating multiple reactive power resources, and under a condition of acceptable accuracy loss, takes in account safety of power grid operation, economy of reactive power resource actions and high reliability of online operation.

Online voltage control method for coordinating multi-type reactive power resources using reactive voltage operation characteristics of power grids

A reactive power-voltage control method for integrated transmission and distribution networks is provided. The reactive power-voltage control method includes: establishing a reactive power-voltage control model for a power system consisting of a transmission network and a plurality of distribution networks; performing a second order cone relaxation on a non-convex constraint of the plurality of distribution network constraints to obtain the convex-relaxed reactive power-voltage control model; solving the convex-relaxed reactive power-voltage control model to acquire control variables of the transmission network and control variables of each distribution network; and controlling the transmission network based on the control variables of the transmission network and controlling each distribution network based on the control variables of the distribution network, so as to realize coordinated control of the power system.

Reactive power and voltage control method

Leave-on oral care compositions comprising a hyaluronic acid or a salt thereof having good spreadability and improved retention period are provided for promoting Gum Health of a user.

Leave-on oral care compositions comprising a hyaluronic acid, and a gum-strengthening polyol are provided for promoting Gum Health of a user.

Leave-on oral care compositions having good spreadability and improved retention property are provided for promoting Gum Health of a user. Said leave-on oral care compositions comprise a hyaluronic acid or a salt thereof, a polyacrylic acid as a mucoadhesive polymer and an additional polymer.

The present disclosure proposes a decomposition-coordination voltage control method for wind power to be transmitted to a nearby area via flexible DC. The method includes: initializing parameters; sending the parameters to wind power farms; for each of the wind power farms, establishing a voltage control optimization sub-model; solving the voltage control optimization sub-model to obtain a first optimal result; for the control center, establishing a voltage control optimization main model; solving the voltage control optimization main model to obtain a second optimal result; calculating a determination index based on the first optimal result and the second optimal result; and determining whether the determination index is convergent to an admissible value, if no, updating the parameters and returning to establishing the voltage control optimization sub-model.

Growing community of inventors

Beijing, China

Guannan Wang