Beijing Baidu Netcom Science and Technology Co., Ltd.

China Building Materials Academy Co., Ltd.

2nd Assignee: China National Building Material Group Co., Ltd.

1st Assignee: China Building Materials Academy Co., Ltd.

Guang Yao

Miao Zhang

Min Wang

Yang Yu

Wen Ji Huang

Xin Shen

Kunyue Zhang

Zhaijun Wen

Jing Wang

Xin Li

Mingming Sun

Yuchao Zhang

Yun Liu

Gongwei Wu

Jiyang Zhang

Heyi Tang

Zhongcheng Ma

Guanbao Tang

Xianbin Wang

Suihua Guo

Ao Liu

Xiaopeng An

Xiao Zhi

Tingting Bao

Xianshu Gao

A method for preparing low-background cement includes: uniformly mixing a seed crystal of cement, CAF whiskers, and high-magnesium raw material to yield a first mixture, calcining the first mixture at 1400-1500° C., to yield a low-background clinker, the first mixture including 1.0-5.0 wt. % of the seed crystal of cement, 1.0-5.0 wt. % of the CAF whiskers, and the balance is the high-magnesium raw material; and grinding a second mixture of the low-background clinker and gypsum, to yield low-background cement. The seed crystal of cement is a high-magnesium and low hydration heat clinker, has a specific activity of Ra-226 radioactive nuclides within 50 Bq/kg, and the MgO content of the clinker is between 4.0 wt. % and 5.0 wt. %, with 50 wt. %≤CS≤55.0 wt. %; and the high-magnesium raw material has a MgO content between 2.5 wt. % and 3.0 wt. %.

Method for preparing low-background cement

A method for preparing Portland cement includes: respectively weighing iron slag, copper slag, vanadium slag, and nickel slag and grinding, to yield prefabricated iron slag, prefabricated copper slag, prefabricated vanadium slag, and prefabricated nickel slag; weighing mica and kaolinite, mixing, and grinding to obtain aluminous raw materials; evenly mixing the prefabricated iron slag and the aluminous raw materials, and calcining, to yield an iron-aluminum eutectic mineral; weighing the marble, fluorite, dolomite, and quartz, evenly mixing the marble, fluorite, dolomite, and quartz with the prefabricated copper slag, prefabricated vanadium slag, and prefabricated nickel slag to yield a first mixture; grinding the iron-aluminum eutectic mineral to yield powders, and calcining a second mixture of the first mixture and the powders, to yield the cement clinker; and cooling the cement clinker, and grinding a third mixture of the cooled cement clinker and the gypsum, to yield the Portland cement.

Method for preparing portland cement featuring early strength, low shrinkage, and low heat

Embodiments of a method, device, and terminal apparatus for load balancing and a storage medium are provided. The method can include acquiring a service traffic of a service request received by at least one load balancer configured for an equipment room of a plurality of equipment rooms, acquiring a dispatching result of the load balancer, according to the service traffic of the service request and a service capacity of the equipment room, and pushing the dispatching result to a distribution proportion configuration center configured to send the dispatching result to the load balancer, where the dispatching result is used to indicate the load balancer to distribute the service request to one or more equipment rooms.

Method and device for load balancing, and storage medium

Disclosed are a method and an apparatus for setting an access privilege. The method includes: acquiring Internet Protocol (IP) addresses having a access frequency to a target application greater than or equal to a frequency threshold, selecting IP addresses accessing more than one applications per time unit from the IP addresses as to-be-processed IP addresses to generate a to-be-processed IP address set; acquiring access information, related to an access of a target application, of the to-be-processed IP address; acquiring a plurality of target IP addresses in the to-be-processed IP address set based on the access information, determining a probability of access through a gateway by a terminal pointed by each target IP address; and selecting a preset proportion or a preset number of target IP addresses from the plurality of target IP addresses in a descending order of the probability to set the access privilege.

Method and apparatus for setting access privilege, server and storage medium

A method and apparatus for controlling data transmission includes: obtaining an amount of data, the data requested by a requesting server, an instructed deadline, and candidate source servers storing the requested data; obtaining, based on the amount of data, a minimum bandwidth required for transmitting the requested data before the deadline as a required bandwidth corresponding to the requested data; and selecting one of the candidate source servers as a source server for transmitting the requested data, based on the required bandwidth, bandwidth resources of the candidate source servers and the requesting server, and remaining bandwidth of links between the candidate source servers and the requesting server. This implementation implements the selection of the most appropriate source server from the holistic perspective, ensures that data transmission can be completed before the deadline, and effectively utilize the link bandwidth.

Method and apparatus for controlling data transmission

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Beijing, China

Guang Yao