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Chinese Chemical Letters 2010年第8期21卷 931-934页

作者： hong Sheng li yi Qun li Department of Chemistry Jinan UniversityGuangzhou 510632China

In the presence of diethyl 1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylate（DHP） and a catalytic amount of potassium iodide,severalα-halo ketones were easily reduced to the corresponding ketones in acetone *** procedure presented here showed several merits such as short reaction time,practical experimental and isolated procedure,and excellent yields of products.

关键词： Dehalogenation α-Halo ketones Hantzsch ester 1 4-Dihydro-2 6-dimethylpyridine-3 5-dicarboxylate Potassium iodide

Effect of electromagnetic stirrer centered outside the mold on steel flow field of bloom continuous casting

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China Foundry 2023年第5期20卷 461-468页

作者： li-dong Xing Yan-ping Bao Min Wang yi-hong li State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing(USTB)Beijing 100083China Technical Support Center for Prevention and Control of Disastrous Accidents in Metal Smelting University of Science and Technology Beijing(USTB)Beijing 100083China School of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China

Mold electromagnetic stirring technology for optimizing the flow of molten steel is now widely used in the continuous casting production process of high-quality ***,studies on the case that the center of the electromagnetic stirrer is located outside the mold have not been ***,the effect of the electromagnetic stirrer centered outside the mold on the steel flow field was studied in detail by means of numerical simulations.A Gauss meter was used to measure the magnetic induction intensity at different positions,currents,and *** test results were compared with the simulation results of electromagnetic stirring to calibrate and verify the accuracy of the electromagnetic ***,electromagnetic force was introduced into the flow field model as a source term to study its effect on the flow field under anomalous *** results show that when the center of the electromagnetic stirrer is located outside the mold,the magnetic field strength is about twice as strong as that located inside the *** also leads to an increase in the flow velocity near the electromagnetic *** a result,the optimal electromagnetic stirring parameters(200 A,2.5 Hz)were specified when the center of the electromagnetic stirrer is located outside the mold.

关键词： numerical modeling electromagnetic stirring fluid flow outside the mold bloom

Construction of Multi-level Space-filling Designs via Code Mappings

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Acta Mathematicae Applicatae Sinica 2022年第1期38卷 24-36页

作者： Hui-li XUE Xing-you HUANG hong-yi li College of Mathematics and Statistics Jishou UniversityJishou 416000China

Space-filling designs are widely used in various fields because of their nice space-filling *** designs are one of space-filling designs,which desires the experimental points to scatter uniformly over the experimental *** practical need,the construction and their properties of nine-level uniform designs are discussed via two code mappings in this ***,the algorithm of constructing nine-level uniform designs is presented from an initial three-level design by the Type-I code mapping and tripling ***,the algorithm of constructing nine-level uniform designs is presented from a three-level base design by the Type-II code mapping and generalized orthogonal ***,relative properties are discussed based on the two code ***,some numerical examples are given out for supporting our theoretical results.

关键词： space-filling design uniformity wrap-around L2-discrepancy generalized minimum aberration code mapping

A Generalized Hankel Transformation Derived by Parametrized Entangled State Representations

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Communications in Theoretical Physics 2008年第7期50卷 85-88页

作者： FAN hong-yi HU li-Yun Department of Physics Shanghai Jiao Tong University Shanghai 200030 China

Using the parametrized entangled state representations we have found a generalized Hankel transformationwith the integral kernel being a combination of Bessel *** generalized Hankel transformation corresponds tothe ap... 详细信息

关键词： parametrized bipartite entangled state generalized Hankel transformation

Query routing mismatch alleviation architecture for P2P file lookup in MANETs

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The Journal of China Universities of Posts and Telecommunications 2011年第4期18卷 111-117页

作者： MEI Jing-qing JI hong li yi Key Laboratory of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China

A cross-layer optimized query routing mismatch alleviation （QRMA） architecture is proposed to mitigate the problem of query routing mismatch （QRM） phenomenon between the structured peer to peer （P2P） overlay and the routing layer in mobile Ad-hoc networks （MANETs）, which is an important issue that results in the inefficiency of lookup process in the system. Explicated with the representative Chord protocol, the proposal exploits the information of topologic neighbors in the routing layer of MANETs to find if there is any optimized alternative next hop in P2P overlay during conventional lookup progress. Once an alternative next hop is detected, it will take the shortcut to accelerate the query procedure and therefore alleviate the QRM problem in scalable MANETs without any assistance of affiliation equipments such as GPS device. The probability of finding out such an alternative node is formulated and the factors that could increase the chance are discussed. The simulation results show that the proposed architecture can effectively alleviate the QRM problem and significantly improve the system performance compared with the conventional mechanism.

关键词： query routing mismatch P2P overlay Chord MANETs

Multi-path routing based on load-balance for cognitive packet networks

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The Journal of China Universities of Posts and Telecommunications 2011年第5期18卷 71-75页

作者： CHEN liang JI hong li yi li Xi College of Information and Commumieation Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

Quality of service （QoS） routing algorithms have been hardly discussed in the scientific community, most previous work on QoS routing concentrates on the performance of the single route. Cognitive packet network （CPN） has been designed for providing QoS routing. In this paper, to balance the loads among networks, we present a multi-path routing algorithm based on load-balance （MPRLB）, which is carried out in two steps. The algorithm with low computational complexity is firstly applied to establish multi path routing for each source and destination node pairs （SD-pair） nodes in the network. Then, we propose the hopfield neural network algorithm, which is applied to improve the efficiency of the flow deviation method for fast flow allocation among the links of the network based on load balance. Extensive simulation results demonstrate that the proposed scheme significantly improves the performance compared with the existing scheme that ignores load balancing.

关键词： hopfield neural network CPN multi-path routing

Microemulsion leaching of vanadium from sodium-roasted vanadium slag by fusion of leaching and extraction processes

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International Journal of Minerals,Metallurgy and Materials 2021年第6期28卷 974-980页

作者： Yun Guo hong-yi li yi-heng Yuan Jie Huang Jiang Diao Gang li Bing Xie College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials Chongqing UniversityChongqing 400044China

The fusion of the leaching and purification processes was realized by directly using microemulsion as the leaching *** bis-(2-ethyhexyl)phosphoric acid(DEHPA)/n-heptane/NaOH microemulsion system was established to directly leach vanadates from sodium-roasted vanadium *** effect of the leaching agent on the leaching efficiency was investigated,in addition to the molar ratio of H_(2)O/NaDEHP(W),DEHPA concentration,solid/liquid ratio,stirring time,and leaching *** optimal situations,the vanadium leaching efficiency reaches 79.57%.The X-ray diffraction characterization of the leaching residue and the Raman spectrum of the microemulsion before and after leaching demonstrate the successful entry of vanadates from the sodium-roasted vanadium slag into the *** proposed method successfully realizes the leaching and purification of vanadates in one step,thereby greatly reducing production costs and environmental *** also offers a new way to achieve the green recovery of valuable metals from solid resources.

关键词： vanadium slag sodium roasting clinker microemulsion leaching extraction

Numerical simulation of flow characteristics of side-bottom combined blowing in iron bath reactor

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Journal of Iron and Steel Research International 2023年第2期30卷 236-248页

作者： yi-bo He Wen-ke Guo yi-hong li Guang-ming liu Xin Cui School of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan030024ShanxiChina

A numerical model of an iron bath smelting reduction furnace with side-bottom combined blowing was established to study the influence of blowing arrangements on the stirring effect of the molten pool,and the accuracy of numerical simulation was verified by water model *** comparing the flow field of molten pool with single nozzle,double nozzles(symmetrical and asymmetrical),and four nozzles(symmetrical and asymmetrical),the proportion of dead zone,average turbulent kinetic energy,and mixing time,the results show that asymmetrical bottom blowing is better than symmetrical bottom blowing,and the effect of double nozzles bottom blowing was better than that of four nozzles bottom *** mixing effect is the worst under the condition of single *** the bottom blowing is asymmetrical with double nozzles,the mixing time is the *** the condition of double nozzles asymmetrical bottom blowing,when the insertion angle and depth of side lance are larger and deeper,the velocity streamline of molten slag layer is denser and the value is larger;meanwhile,the reflux of molten iron layer is larger,the proportion of dead zone is smaller,and the whole molten pool is fully *** the insertion depth of the side lance is deeper,the gas holdup in the molten pool is greater and the stirring of the molten pool is more intense,while the insertion angle has little effect on the gas *** comparing the influence of different side blowing conditions on the slag layer,it is found that the slag layer is divided into two layers by double-layer side lance,with the critical surface of the slag layer at about 200-260 mm from the bottom,and the insertion depth of the lower side lance has a greater influence on the layering of the slag.

关键词： Iron bath smelting reduction Side-bottom combined blowing Numerical simulation Mixing time Slag layering

Two Schemes for Probabilistic Remote Preparation of a Four-Particle Entangled Cluster-Type State

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Communications in Theoretical Physics 2014年第3期61卷 305-314页

作者： HOU Kui WANG hong-Yan li yi-Bao Department of Mathematics and Physics Anhui Jianzhu University Hefei 230601 China

Using partial entangled states as the quantum channel, two schemes for probabilistic remote preparation of the four-particle cluster-type state with real and complex coefficients are presented. In the first scheme, the sender and the receiver share two partial Bell states and one partial three-qubit GHZ stats as the quantum channel, and the sender can help a remote receiver to prepare a four-particle entangled cluster-type state by using three-qubit projective measurements with certain probability. In the second scheme, the quantum channel is composed of two partial three-qubit GHZ states, the remote state preparation(RSP) can be successfully realized via the positive operator valued measure(POVM), and the two-particle projective measurements are also needed in this process. The total success probability and classical communication cost are calculated.

关键词： remote state preparation GHZ state Positive operator-valued measure classical information

Optimization of strand and final electromagnetic stirrers of round bloom casters with multiple sections

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International Journal of Minerals,Metallurgy and Materials 2016年第10期23卷 1150-1156页

作者： Rui Wang Yan-ping Bao yi-hong li Hang-Hang An State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing School of Material Science and Technology Taiyuan University of Science and Technology

Strand electromagnetic stirring（S-EMS） and final electromagnetic stirring（F-EMS） are the main methods used to improve the center porosity and segregation for round blooms. To optimize the stirring conditions, nail shooting tests were conducted for three sections of large round blooms with diameters of ф380 mm, ф450 mm, and ф600 mm. Acid leaching and sulfur print tests were used to investigate the shell thickness. Based on the results of nail shooting tests, a mathematical model of solidification was established, and the variation of shell thickness and the central solid fraction were exactly calculated by the model. By taking all sections into account, the locations of S-EMS and F-EMS were optimized for each section. In the results, the macro-segregation of various sections is improved after the locations of S-EMS and F-EMS systems are changed.

关键词： continuous casting electromagnetic stirring blooms mathematical models optimization