Tsinghua University

China Petroleum Chemical Corporation

Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation

Jilong Wang

Qianli Zhang

Jun Feng Liu

Tonglin Li

Mingfang Zheng

Haiying Zhang

Shuying Zhuang

Huaijie Wang

Weizhen Li

Yu Chen Zhou

Hongfei Wu

Lan Zhao

Congcong Miao

Mingjun Xie

Chunhong Wu

Zhiguang Jia

Yanping Qi

Yuling Piao

Xiangyu Tang

The present disclosure discloses a cyberspace map model creation method, which includes: determining that a coordinate system of a cyberspace map model uses an IP address as a basic vector; mapping the IP address to a two-dimensional coordinate system; determining, by means of orthogonalizing a logical port, a region, a topological structure to the IP address, a three-dimensional coordinate system to describe more fine-grained information of a cyberspace; constructing a scale standard, so as to lay a theoretical foundation for a multi-level and scalable representation of complex and diverse cyberspace resources in the cyberspace map model; and determining a mapping relationship between a cyberspace map and a geographic map to support screen segmentation, so as to perform a comparison drawing of a same cyberspace scenario in different cyberspace maps and geographic maps, and present cyberspace information in many aspects.

Cyberspace map model creation method and device

A cyberspace coordinate system creation method and apparatus based on an autonomous system is provided. The method includes: determining a cyberspace coordinate system; constructing a framework for a three-dimensional cyberspace coordinate system; constructing a cyberspace map model based on the cyberspace coordinate system and the framework for the three-dimensional cyberspace coordinate system; and designing an application scenario corresponding to a constructed cyberspace map model, and performing visualization processing on the application scenario. The method may realize the visualization of multi-dimensional information of cyberspace based on a unified and constant backboard, e.g., an Autonomous System (AS) topology, an Internet Protocol (IP) address composition, network resource element information, a hierarchical structure, and the like, and is suitable for visualization of a number of security attacks on the cyberspace and network management scenarios.

Cyberspace coordinate system creation method and apparatus based on autonomous system

A method for managing data asset in a data bank is provided, including: acquiring a confirmation authentication request, wherein the confirmation authentication request includes a data asset to be confirmed, characteristic information of the data asset and characteristic information of a data provider uploaded by the data provider; performing a confirmation verification on the data asset through a confirmation blockchain based on the data asset, the characteristic information of the data asset and the characteristic information of the data provider in response to the confirmation authentication request; storing confirmation information corresponding to the data asset into the confirmation blockchain after it is determined that the data asset has passed the confirmation verification; inserting identification data for tracing a data owner into the data asset, obtaining and storing the data asset having the identification data.

Method for managing data asset in data bank and data bank system

A method, an apparatus, and a system for time synchronization based on in-band telemetry are disclosed. The method includes: acquiring an estimated value of delay in a first transmission direction and an estimated value of delay in a second transmission direction; wherein the estimated value of delay in the first transmission direction is determined according to multiple delay samples in the first transmission direction, and the estimated value of delay in the second transmission direction is determined according to multiple delay samples in the second transmission direction, the first transmission direction is a direction from a second device to a first device, and the second transmission direction is vice versa; and determining a time system error of the first device relative to the second device according to the estimated value of delay in the first transmission direction and the estimated value of delay in the second transmission direction.

Method, apparatus, and system for time synchronization based on in-band telemetry

The present disclosure discloses a method and a device for accessing location related information. The method includes: receiving a request for assigning a network address to a POI; encoding the POI based on a preset geographical name code database to obtain a POI code of the POI; mapping the POI code into a network address, the network address comprising at least one of an IPv6 unicast address, an IPv6 multicast address, or a domain name; and sending the network address to a network device, enabling the network device to obtain location related information of the POI by accessing a site corresponding to the network address.

Method and device for accessing location related information

The present disclosure provides a catalyst composition for ethylene oligomerization including an imino ferrous complex shown in Formula (I) as the main catalyst, an aluminum-containing cocatalyst, water, and an organic solvent:  According to the present disclosure, a higher oligomerization activity can be obtained with the catalyst composition than with a catalyst composition system in the prior art which contains no water. Moreover, when the catalyst composition according to the present disclosure is used, a high selectivity of &#x3b1;-olefins is obtainable. Besides, the catalyst composition according to the present disclosure can enable rapid initiation, stable operation, and good repeatability of the oligomerization reaction. According to the present disclosure, a high oligomerization activity can be obtained even at a rather low ratio of Al/Fe, or at a low reaction temperature.

Catalyst composition and process for ethylene oligomerization

Provided are a process for preparing an N ortho acyl substituted nitrogen-containing heterocyclic compound and an aminal iron (II) complex thereof, and the use of the complexes obtained by the process in an olefin oligomerization catalyst. The N ortho acyl substituted nitrogen-containing heterocyclic compound in the present invention is for example 2-acyl-1,10-phenanthroline or 2,6-diacetyl pyridine as shown in formula b, and the N ortho acyl substituted nitrogen-containing heterocyclic compound in the present invention is produced by a reaction of a precursor thereof in a substituted or unsubstituted nitrobenzene. Preferably the precursor shown in formula I in the present invention is produced by 1,10-phenanthroline reacting with trialkyl aluminum, or a halogenoalkyl aluminum RAIX, or a substituted or unsubstituted benzyl lithium Ph'CHLi, followed by hydrolysis. The preparation method provided in the present invention has a few synthetic steps, an easy process, a low toxic effect, and reduces the preparation costs of the catalyst, and has a promising outlook in the industrial application. 

N ortho acyl substituted nitrogen-containing heterocyclic compound and process for preparing aminal iron (II) complexes thereof

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Beijing, China

Jilong Wang