Abstract: This invention relates to a method for preparing a polycarboxylate superplasticizer by graft copolymerization of fatty acid vinyl ester onto acrylate polymer. In this invention, a type of polycarboxylate superplasticizer by graft copolymerization of fatty acid vinyl ester onto acrylate polymer was synthesized by the processes of polymerization-grafting-alcoholysis-hydrolysis with acrylate and fatty acid vinyl ester as main reactants. In the first polymerization step, the polyacrylate was synthesized by using acrylate as monomer and a certain amount of initiator and molecular weight regulator. In the second graft copolymerization step, the graft polymer with polyacrylate as main chain and poly(fatty acid vinyl ester) as side chain was synthesized by graft copolymerization between polyacrylate and fatty acid vinyl ester. The final polycarboxylate superplasticizer product with polyacrylic acid as main chain and polyvinyl alcohol as side chain was obtained by subsequent alcoholysis and hydrolysis steps.

Abstract: This invention relates to a method for preparing a polycarboxylate superplasticizer by graft copolymerization of fatty acid vinyl ester onto acrylate polymer. In this invention, a type of polycarboxylate superplasticizer by graft copolymerization of fatty acid vinyl ester onto acrylate polymer was synthesized by the processes of polymerization-grafting-alcoholysis-hydrolysis with acrylate and fatty acid vinyl ester as main reactants. In the first polymerization step, the polyacrylate was synthesized by using acrylate as monomer and a certain amount of initiator and molecular weight regulator. In the second graft copolymerization step, the graft polymer with polyacrylate as main chain and poly(fatty acid vinyl ester) as side chain was synthesized by graft copolymerization between polyacrylate and fatty acid vinyl ester. The final polycarboxylate superplasticizer product with polyacrylic acid as main chain and polyvinyl alcohol as side chain was obtained by subsequent alcoholysis and hydrolysis steps.

Abstract: A method for aggregating messages based on a point of interest is provided, the method including: acquiring an instruction to trigger a point of interest; acquiring a region unit in which the point of interest is located from an electronic map which is divided into a plurality of region units in advance, and acquiring a predetermined number of region units including the region unit in which the point of interest is located by taking the region unit in which the point of interest is located as a center; acquiring messages issued within the predetermined number of region units; and generating a message aggregating page including a map indicative of the point of interest based on the acquired messages and displaying the acquired messages on the message aggregating page. A system for aggregating messages based on a point of interest is also provided.

Abstract: Systems and methods are provided for presenting information. For example, a trigger command is acquired; one or more first points of interest are selected based on at least information associated with the trigger command; a first zone associated with the first points of interest is acquired from an electronic map, the electronic map being divided into a plurality of second zones including the first zone; a predetermined number of third zones are acquired from the plurality of second zones, the first zone being included at a center area of the third zones; one or more first messages published in the third zones and one or more first geographic positions corresponding to the one or more first messages are acquired; and the first messages published in the third zones and the corresponding first geographic positions are presented according to certain embodiments.

Abstract: A method for aggregating messages based on a point of interest is provided, the method including: acquiring an instruction to trigger a point of interest; acquiring a region unit in which the point of interest is located from an electronic map which is divided into a plurality of region units in advance, and acquiring a predetermined number of region units including the region unit in which the point of interest is located by taking the region unit in which the point of interest is located as a center; acquiring messages issued within the predetermined number of region units; and generating a message aggregating page including a map indicative of the point of interest based on the acquired messages and displaying the acquired messages on the message aggregating page. A system for aggregating messages based on a point of interest is also provided.

Abstract: This invention relates to a method for preparing a star-shaped polycarboxylate superplasticizer by the first esterification step with polyol and (meth)acrylic acid as main reactants and the second polymerization step. In the first step, the star-shaped polymerizable active ends were synthesized by esterification between polyol and (meth)acrylic acid in the presence of catalyst. In the second step, the final star-shaped polycarboxylate superplasticizer was prepared by radical polymerization among the product obtained in first step, unsaturated polyoxyethylene ethers, molecular weight regulator and unsaturated carboxylic acid in the presence of initiator. The production process of this invention exhibits some characteristics including simple, easily controllable, high polymerization degree, low cost and pollution free. The star-shaped molecular structure of polycarboxylate superplasticizer can be achieved through synthesizing active “core” by esterification and “arm” by radical polymerization.

Abstract: A method and system for accessing a micro-blog album is provided. The method comprises: a micro-blog client receives a micro-blog album viewing request message entered by a user which carries an identifier, sends the micro-blog album viewing request message to a micro-blog server; the micro-blog client receives a micro-blog message corresponding to the identifier fed back by the micro-blog server; the micro-blog client obtains pictures according to the picture link address carried by the micro-blog message from the micro-blog server, generates a micro-blog album according to all the obtained pictures, and display the micro-blog album. The solution of the present invention could centrally display the historical pictures uploaded by the user through the micro-blog client.

Abstract: The present disclosure discloses a method and system for displaying a microblog topic, a UE, a server, and a non-transitory computer-readable storage medium in the field of communication. The method includes that: when a receiver needs to receive a microblog topic, information on a location of the receiver is acquired; the microblog topic and information on a location where the microblog topic is released are acquired from a microblog server according to a preset distance and information on the location of the receiver, wherein a distance between the location where the microblog topic is released and the location of the receiver is no greater than the preset distance; and the microblog topic is displayed in a map of an area in which the receiver is located on a User Equipment (UE) according to the information on the location where the microblog topic is released. The system includes the UE and the microblog server.

Abstract: This invention relates to a method for preparing a star-shaped polycarboxylate superplasticizer by the first esterification step with polyol and (meth)acrylic acid as main reactants and the second polymerization step. In the first step, the star-shaped polymerizable active ends were synthesized by esterification between polyol and (meth)acrylic acid in the presence of catalyst. In the second step, the final star-shaped polycarboxylate superplasticizer was prepared by radical polymerization among the product obtained in first step, unsaturated polyoxyethylene ethers, molecular weight regulator and unsaturated carboxylic acid in the presence of initiator. The production process of this invention exhibits some characteristics including simple, easily controllable, high polymerization degree, low cost and pollution free. The star-shaped molecular structure of polycarboxylate superplasticizer can be achieved through synthesizing active “core” by esterification and “arm” by radical polymerization.

Abstract: Methods and mobile terminals are provided for displaying microblog topics. An example method includes, sending by a mobile terminal a post that includes at least a first geographic location of the mobile terminal to a server so that the server can search for microblog topics associated with the first geographic location of the mobile terminal based on at least information associated with the post, receiving the microblog topics sent by the server, and sorting the received microblog topics. The method further includes, displaying one or more first microblog topics of the sorted microblog topics on a center area of an interface of the mobile terminal, and displaying the rest of the sorted microblog topics around the center area toward one or more sides of the interface.

Abstract: Systems and methods are provided for presenting information. For example, a trigger command is acquired; one or more first points of interest are selected based on at least information associated with the trigger command; a first zone associated with the first points of interest is acquired from an electronic map, the electronic map being divided into a plurality of second zones including the first zone; a predetermined number of third zones are acquired from the plurality of second zones, the first zone being included at a center area of the third zones; one or more first messages published in the third zones and one or more first geographic positions corresponding to the one or more first messages are acquired; and the first messages published in the third zones and the corresponding first geographic positions are presented according to certain embodiments.