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Numerical simulation of uranium tetrafluoride fluorination in a multistage spouted bed using the improved CFD-DEM chemical reaction model

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Particuology 2023年第4期75卷 119-136页

作者： Mofan Qiu Zhao Chen lin jiang Rongzhen Liu Yaping Tang Malin Liu Institute of Nuclear and New Energy Technology Collaborative Innovation Center of Advanced Nuclear Energy TechnologyTsinghua University.Beijing.100084China

A CFD-DEM reaction coupling model was established to simulate UF_(4) fluorination process,in which heat and mass transfer,heterogeneous chemical reaction,and particle shrinkage model were *** gas behavior was described by the conservation laws of mass,momentum,and *** solid phase is modeled with the discrete element method,considering the gas-solid interphase force,contact force,heat transfer,and chemical reaction models based on the discretized *** particle can be individually tracked and associated with specific physical *** proposed CFD-DEM reaction coupling model based on particle shrinking reaction model with discretized surface was validated by the experimental and literature results at *** a multistage conical spouted bed was proposed and the process of UF_(4) fluoridation reaction in it was *** fluidization characteristics and the con-centration distribution of gaseous products in the spouted bed with an extended gas velocity range were obtained and *** addition,the effects of different parameters,such as superficial gas velocity,temperature,fluorine concentration,on fluoridation rate and the fluorine conversion rate were inves-tigated based on the proposed CFD-DEM reaction coupling *** results obtained in this work are beneficial for method development of the chemical reaction simulation research in particle scale using the CFD-DEM model,and useful for operation and equipment parameters design of the uranium tetra-fluoride fluorinate industrial process in the future.

关键词： CFD-DEM Particle shrinkage model Multistage spouted bed Uranium fluorination

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CFD-DEM simulation of high density particles fluidization behaviors in 3D conical spouted beds

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Particuology 2024年第5期88卷 266-281页

作者： lin jiang Mofan Qiu Rongzheng Liu Bing Liu Youlin Shao Malin Liu Institute of Nuclear and New Energy Technology Collaborative Innovation Center of Advanced Nuclear Energy TechnologyTsinghua UniversityBeijing 100084China

The spouted bed has been used in the coating process of high-density nuclear fuel *** particle fluidization behaviors in pseudo-2D and 3D spouted beds were simulated and *** effects of four independent variables(cone angle,particle density,inlet gas velocity,and particle loading)on particle fluidization behaviors in the 3D spouted bed were investigated *** cone angle effect on fluidization mechanism was studied quantitatively first time.A new fluidization quality index was proposed based on the particle entrainment principle,and an extreme value was obtained when the cone angle was 60°,considered to be the optimum value for the 3D conical spouted *** was indicated the gas–solid contact efficiency can be kept up if the gas velocity was proportional to ρ_(p)^(0.65) and N_(p)^(0.78) when the particle density or loading was *** results will be useful for geometry and operation parameters design of the 3D conical spouted bed and helpful for developing the fluidization mechanism of high-density particles.

关键词： Spouted bed High-density particle CFD-DEM Fluidization quality index Particle loading

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Thellungiella halophila ThPIP1 gene enhances the tolerance of the transgenic rice to salt stress

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Journal of Integrative Agriculture 2015年第10期14卷 1911-1922页

作者： QIANG Xiao-jing YU Guo-hong jiang lin-lin SUN lin-lin ZHANG Shu-hui LI Wei CHENG Xian-guo Key Lab of Plant Nutrition and Fertilizers Ministry of Agriculture/Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural Sciences College of Land and Environment Shenyang Agricultural University

Aquaporin proteins were demonstrated to play an important regulatory role in transporting water and other small molecules. To better understand physiological functions of aquaporins in extremophile plants, a novel ThPIP1 gene from the Thellungiella halophila was isolated and functionally characterized in the transgenic rice. Data showed that the ThPIP1 protein encoded 284 amino acids, and was identified to be located on the plasma membrane. The expression of ThPIP1 gene in the shoots and roots of T. halophila seedlings were induced by high salinity. The transgenic rice overexpressing ThPIP1 gene significantly increased plants tolerance to salt stress through the pathway regulating the osmotic potentials, accumulation of organic small molecules substances and the ratio of K＋/Na＋ in the plant cells. Moreover, split-ubiquitin yeast two-hybrid assay showed that Th PIP1 protein specifically interacted with ThPIP2 and a non-specific lipid-transfer protein 2, suggesting that ThPIP1 probably play a key role in responding to the reactions of multiple external stimulus and in participating in different physiological processes of plants exposed to salt stress.

关键词： ThPIP1 transgenic rice salt stress protein interaction Thellungiella halophila

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Experimental Study on Flexural Behaviour of Circular Concrete-Filled FRP-PVC Tubular Members

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沈阳建筑大学学报（自然科学版） 2012年第6期28卷 988-996页

作者： MA Shenglan lin Quan jiang Shaofei College of Civil Engineering Fuzhou University Fuzhou China 350108

An experimental investigation was conducted on the flexural behavior of FRP-PVC confined concrete circular tubular members.A total of six specimens were prepared and tested under flexural *** main parameters varied in the tests were the layer of FRP and the strengthening approach of BFRP and *** failure modes,ultimate bending capacity and stress-strain relation curves were investigated in ***,the relation model of moment(M)-curvature(φ)was studied,and on the basis of M-φ relation model,a simplified formula was presented to compute the ultimate bending moment *** results show that the external confinement of concrete specimens by FRP-PVC tubes results in enhancing the ultimate bending strength and ultimate deformation,and the ultimate bending capacity increased with the FRP ***,the reinforcement effect in CFRP is better than that in *** ultimate bending moment capacity values predicted by the presented formula agree well with the experimental results,which imply that the presented formula is applicable and efficient for prediction of the ultimate bending moment capacity as well.

关键词： FRP-PVC tubes flexural loading ultimate bending moment capacity the section flexural coefficient

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Evaluation of Protocols Used in 2-D Electrophoresis for Proteome Analysis of Young Rice Caryopsis

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Genomics, Proteomics & Bioinformatics 2011年第6期9卷 229-237页

作者： jiang-lin Liao Ying-Jin Huang MOE Key Laboratory of Crop Physiological Ecology and Genetic Breeding Jiangxi Agricultural University Nanchang 330045 China.

In order to obtain a high-resolution electrophorogram of rice young panicle proteome, we evaluated various protocols commonly used in two-dimensional （2D） polyacrylamide gel electrophoresis （PAGE） of proteins, including gel staining protocol, pH range of immobilized pH gradient （IPG） strips and sample loading quantity. Results showed that a silver staining protocol using sensitized solution containing glacial acetic acid, sodium acetate and sodium thiosulfate （reported by Heukeshoven and Dernick in 1988） and a Coomassie Brilliant Blue staining method using solution containing G-250, ammonium sulfate and phosphoric acid （reported by Pink et al in 2010） demonstrated the superior staining effect. In addition, we also showed that higher resolution was achieved when IPG gel strip with pH range of 5-8 was used, compared to that with pH range of 4-7. Finally, the optimal loading quantity was determined as 130 ug using the 17 cm-long nonlinear IPG strip with pH 5-8 in combination with the silver nitrate staining protocol. The evaluated results would be helpful in proteome analysis of young rice caryopsis.

关键词： protocol 2-DE proteome rice caryopsis

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Phylogenetic diversity stabilizes community biomass

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Journal of Plant Ecology 2014年第2期7卷 176-187页

作者： Zhichao Pu Poonim Daya Jiaqi Tan lin jiang School of Biology Georgia Institute of Technology310 Ferst DriveAtlantaGA 30332USA Division of Biology California Institute of Technology1300 E California BoulevardPasadenaCA 91126USA

Aims The relationship between biodiversity and ecological stability is a long-standing issue in *** diversity–stability studies,which have largely focused on species diversity,often report an increase in the stability of aggregate community properties with increasing species *** studies have examined the linkage between phylogenetic diversity,another important dimension of biodiversity,and *** taking species evolutionary history into account,phylogenetic diversity may better capture the diversity of traits and niches of species in a community than species diversity and better relate to temporal *** this study,we investigated whether phylogenetic diversity could affect temporal stability of community biomass independent of species *** We performed an experiment in laboratory microcosms with a pool of 12 bacterivorous ciliated protist *** eliminate the possibility of species diversity effects confounding with phylogenetic diversity effects,we assembled communities that had the same number of species but varied in the level of phylogenetic *** disturbance,in the form of short-term temperature shock,was imposed on each microcosm and species abundances were monitored over *** examined the relationship between temporal stability of community biomass and phylogenetic diversity and evaluated the role of several stabilizing mechanisms for explaining the influence of phylogenetic diversity on temporal *** Findings Our results showed that increasing phylogenetic diversity promoted temporal stability of community *** total community biomass and summed variances showed a U-shaped relationship with phylogenetic diversity,driven by the presence of large,competitively superior species that attained large biomass and high temporal variation in their biomass in both low and high phylogenetic diversity *** without these species showed patterns consistent with the

关键词： biodiversity environmental fluctuation the insurance effect phylogenetic diversity temporal stability

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Residue Theorem based soft sliding mode control for wind power generation systems

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Protection and Control of Modern Power Systems 2018年第1期3卷 256-267页

作者： Mohammed Alsumiri Liuying Li lin jiang Wenhu Tang University of Liverpool LiverpoolUK

This paper proposes a residue theorem based soft sliding mode control strategy for a permanent magnet synchronous generator(PMSG)based wind power generation system(WPGS),to achieve the maximum energy conversion and improved in the system dynamic *** main idea is to set a soft dynamic boundary for the controlled variables around a reference *** the controlled variables would lie on a point inside the *** convergence of the operating point is ensured by following the Forward Euler *** proposed control has been verified via simulation and experiments,compared with conventional sliding mode control(SMC)and proportional integral(PI)control.

关键词： Maximum power point tracking Sliding mode control Residue theorem Wind power generation system Permanent magnet synchronous generator

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Assessment of early-age cracking of high-performance concrete in restrained ring specimens

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Water Science and Engineering 2010年第1期3卷 113-120页

作者： Quang-phu NGUYEN lin-hua jiang Qiao ZHU College of Mechanics and Materials Hohai University Nanjing 210098 P R. China Faculty of Civil Engineering Water Resources University Hanoi Vietnam

High-performance concrete （HPC） is stronger and more durable than conventional concrete. However, shrinkage and shrinkage cracking are common phenomena in HPC, especially early-age cracking. This study assessed early-age cracking of HPC for two mixtures using restrained ring tests. The two mixtures were produced with water/binder mass ratio （mw/mB） of 0.22 and 0.40, respectively. The results show that, with greater steel thickness, the higher degree of restraint resulted in a higher interface pressure and earlier cracking. With steel thickness of 6 mm, 19 mm, and 30 mm, the age of cracking were, respectively, 12 days, 8 days, and 5.4 days with the mw/mB = 0.22 mixture; and 22.5 days, 12.6 days, and 7.1 days with the mw/mB= 0.40 mixture. Cases of the same steel thickness show that the ring specimens with a thicker concrete wall crack later. With the mw/mB = 0.22 mixture, concrete walls with thicknesses of 37.5 mm, 75 mm, and 112.5 mm cracked at 3.4 days, 8.0 days, and 9.8 days, respectively; with the mw/mB = 0.40 mixture, the ages of cracking were 7.1 days, 12.6 days, and 16.0 days, respectively.

关键词： high-performance concrete shrinkage early-age cracking restrained ring test

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High performance architecture for unified forward and inverse transform of HEVC

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The Journal of China Universities of Posts and Telecommunications 2017年第3期24卷 16-23页

作者： jiang lin Wang Xingjun Wu Xin Deng Junyong Huang Xingjie School of Electronic Engineering Xi'an University of Posts and Telecommunications College of Computer and Information Science Northeastern University

High efficiency video coding （HEVC） transform algorithm for residual coding uses 2-dimensional （2D） 4 × 4 transforms with higher precision than H.264＇s 4 ×4 transforms, resulting in increased hardware complexity. In this paper, we present a shared architecture that can compute the 4 ~4 forward discrete cosine transform （DCT） and inverse discrete cosine transform （IDCT） of HEVC using a new mapping scheme in the video processor array structure. The architecture is implemented with only adders and shills to an area-efficient design. The proposed architecture is synthesized using ISE 14.7 and implemented using the BEE4 platform with the Virtex-6 FF1759 LX550T field programmable gate array （FPGA）. The result shows that the video processor array structure achieves a maximum operation frequency of 165.2 MHz. The architecture and its implementation are presented in this paper to demonstrate its programmable and high performance.

关键词： HEVC forward and inverse transform reconfigurable architecture video processor array structure

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Comparative study of surface electromyography of masticatory muscles in patients with different types of bruxism

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World Journal of Clinical Cases 2022年第20期10卷 6876-6889页

作者： Kai-Wen Lan Liu-lin jiang Ying Yan Hospital of Stomatology Sun Yat-sen UniversityGuangdong Provincial Key Laboratory of StomatologyGuanghua School of StomatologyGuangzhou 510080Guangdong ProvinceChina

BACKGROUND Bruxism is a rhythmic masticatory muscle activity that occurs involuntarily in a non-physiologically functional *** is a lack of research classifying the functional status of masticatory muscles in patients with different mandibular movement types(centric clenching or eccentric grinding)of *** To assess the differences of the masticatory muscle activity in patients with different types of *** A total of 21 subjects with centric bruxism(CB)and 21 subjects with eccentric bruxism(ECB)were screened from college students according to a questionnaire and their tooth wear *** subjects with no bruxism were also *** surface electromyography(EMG)signals of the temporalis anterior(TA)and superficial masseter muscle(MM)were measured in different mandibular positions and during the chewing *** EMG amplitude and chewing cycle duration parameters were then *** The CB group showed fewer muscle maximal motor units,with the MM being more pronounced,a higher proportion of muscle contractions to be recruited for the same load of chewing activity,and a longer chewing *** ECB group showed more TA maximal motor units and higher MM activity on the nonworking side in unilateral *** CB mainly affects the MM,and patients with CB show reduced masticatory muscle contraction efficiency and chewing cycle *** mainly affects the TA,and patients with ECB show enhanced contraction of non-functional lateral muscle bundles.

关键词： Bruxism Electromyography Masticatory muscles Mastication Tooth wear Classification

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