Synthesis, characterization, and catalytic performance of NiMo catalysts supported on different crystal alumina materials in the hydrodesulfurization of diesel

Redispersion effects of citric acid on CoMo/γ-Al2O3 hydrodesulfurization catalysts

An approach to study the desulfurization mechanism and the competitive behavior from aromatics: A case study on CeY zeolite

With the increase of business scenarios in 5G communication, the 5G bearer network puts forward higher requirements in terms of bandwidth, time delay, pan-connection and reliability, and also puts forward extremely high requirements for network-level protection technology. The introduction of segment routing tunnel technology, the innovative establishment of 5G efficient carrying network. Due to the working mechanism of the SR tunnel, the traditional signal degradation protection technology is no longer suitable. This paper proposes a protection scheme for the existence of signal degradation in the Segment Routing - Best Effort tunnel through the OAM message transmission alarm. The signal degradation detection and ISIS protocol, can realize link protection, in order to further improve the user experience, design method trigger TI-LFA protection business protection reverse, improve the reliability and viability of 5G carrying network, confirmed that the scheme has the ability to detect and protect the business flow signal, can be protected in the east-west eX2 traffic business.

Link protection for the signal degradation of the SR-BE tunnels in the SPN

Due to the implementation of more stringent specifications in sulfur content for gasoline , a deep understanding of the active phase of Co-Mo/Al2O3 catalysts is necessary to the development of hydrodesulphurization (HDS) catalysts. A series of Co-Mo/Al2O3 HDS catalysts with different metal loading were studied by laser Raman spectra. The existence form and the content of the active component of the catalyst were obtained by Raman spectra. The result shows that the percentage of characteristic Raman bands 940 cm(-1) correlates linearly with the HDS selectivity, which can be used as an experimental evidence for developing industrial selective HDS catalysts. Raman spectra of sulfided catalysts show that the bands of oxidic catalysts at 839 and 940 cm(-1) disappeared, and simultaneously, the bands of Mo-S at 372 and 408 cm(-1) emerged, which indicate that the oxidic sample is sulfided completely.

[Laser Raman spectra study on Co-Mo/Al2O3 hydrodesulphurization catalysts].

Given the coexistence of heterogeneous hybrid networks such as IP network, 4G network and Software Defined Network (SDN) in the application of digital news media system, this paper designs a routing control algorithm based on SDN network architecture, which can realize the compatibility of internal gateway protocol and OpenFlow communication strategies. Through the analysis of OpenFlow communication protocol in SDN network architecture, the relationship between Interior Gateway Protocol (IGP) and OpenFlow routing rules is found out. Based on the existing hardware structure of the OpenFlow router, the configuration parameters of a port table, port address table and routing table are improved, and the adjacent routing relation table and information transmission port are used to realize the connection between routers are designed. The attention of users is considered It can reduce the burden of system operation and is compatible with the forwarding control of route forwarding and routing filtering. The adjacent routing relation table is designed to control the process of data collection, storage and forwarding, and the input and output ports between adjacent routers are defined. The open router designed in this paper integrates Simple Network Management Protocol (SNMP) agent and SDN agent mechanism organically to achieve the goal of SDN network management; the routing control module focuses on the management of key data flow, realizes the control of routing state and data flow at the same time, and provides the visualization function of routing state and routing state data flow. By constructing the experimental platform of routing transmission and control functions based on routing control and interior gateway protocol, the effect of routing state control of the two methods is compared and analysed from three aspects of packet transmission state, packet processing state and packet receiving delay in routing control process. The experimental results verify the correctness of the design results.

Xing-Yuan Yang

Papers

[Laser Raman spectra study on Co-Mo/Al2O3 hydrodesulphurization catalysts].

Research on Network Routing Control Algorithm Based on OpenFlow and IGP