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The carotenoid characteristics of the important wild shrimp Trachysalambria curvirostris(Stimpson,1860) in China

Journal of Oceanology and Limnology 2019年第2期37卷 706-712页

作者： su fang LIU Jianguo CAS Key Laboratory of Experimental Marine Biology Center for Ocean Mega-Science Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Laboratory for Marine Biology and Biotechnology Qingdao National Laboratory for Marine Science and Technology Qingdao 266071 China University of Chinese Academy of Sciences Beijing 100049 China

Trachysalambria curvirostris is an economically important shrimp in the coastal waters of the Western Indo-Pacific. However, there is no information about its carotenoid composition and distribution. The carotenoid profiles including concentration, composition, molecular forms (free or esterified) and configuration (geometrical and optical isomers) of raw and dried T. curvirostris (Stimpson, 1860) were qualitatively and quantitatively assessed. In the raw shrimp, astaxanthin and β-carotene were the two dominant carotenoids, which contributed 75.18%–88.86% and 2.86%–16.83% of the total carotenoid content. Traces of echinenone, canthaxanthin and astacene were also detected. The carotenoid content in the waste (80.28 mg/kg dry weight) was nearly two-fold higher than that in the meat (49.69 mg/kg dry weight). Of the total astaxanthin in these shrimp, 85.18%–90.59% was esterified. All- trans astaxanthin was the predominant geometrical isomer followed by 13- cis , 9- cis , di- cis and 15- cis isomers. A mix of three stereoisomers was found in all parts and the percentages of meso (3 S , 3’ R ) and (3 S , 3’ S ) forms were significantly higher than the (3 R , 3’ R ) isomer. Compared to the carotenoid content of the raw shrimp, only 26.17 mg/kg remained in the dried shrimp. Nearly half of the carotenoids were lost during the drying process. substantial hydrolysis and isomerization also occurred.

关键词： Trachysalambria curvirostris carotenoids astaxanthin dried shrimp

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Discussion on Fractional(a,b,k)-critical Covered Graphs

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Acta Mathematicae Applicatae Sinica 2022年第2期38卷 304-311页

作者： Wei ZHANG su-fang WANG School of Economics and Management China University of Mining and TechnologyXuzhou 221116China School of Economics and Management Wenzhou University of TechnlogogyWenzhou 325000China School of Public Management Jiangsu University of Science and TechnologyZhenjiang 212100China

A graph G is called a fractional[a,b]-covered graph if for each e∈E(G),G contains a fractional[a,b]-factor covering e.A graph G is called a fractional(a,b,k)-critical covered graph if for any W■V(G)with|W|=k,G-W is fractional[a,b]-covered,which was first defined and investigated by Zhou,Xu and sun[***,***,***,Degree conditions for fractional(a,b,k)-critical covered graphs,Information Processing Letters 152(2019)105838].In this work,we proceed to study fractional(a,b,k)-critical covered graphs and derive a result on fractional(a,b,k)-critical covered graphs depending on minimum degree and neighborhoods of independent sets.

关键词： network fractional(a,b,k)-critical covered graph minimum degree neighborhood of independent set

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Controlling Coherence Transfer of Dimer Interacting with Independent Environments

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Chinese Journal of Chemical Physics 2015年第5期28卷 -页

作者： fang su Zhong-xiao Man Department of Chemistry and Chemical Engineering Jining University Jining 273155 China Shandong Provincial Key Laboratory of Laser Polarization and Information Technology Department of Physics Qufu Normal University Qufu 273165 China

We study the coherence transfer between two pigments (donor and acceptor) of a dimer interacting with two independent environments. By means of a prior weak measurement on the donor and a post measurement, which is either a reversal measurement or a weak measurement, on the acceptor, we present a scheme to optimally control the transfer of the donor's coherence to the acceptor. We construct explicit relationships for the two measurement strengths and the evolution time, by which the coherence degree of the acceptor can approach the maximum value 0.5 at the cost of a decreased probability.

关键词： Dimer Coherence Quantum weak measurement Quantum reversal measurement

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Toughness for Fractional (2, b, k)-Critical Covered Graphs

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Journal of the Operations Research Society of China 2023年第1期11卷 197-205页

作者： su-fang Wang Wei Zhang School of Public Management Jiangsu University of Science and TechnologyZhenjiang212100JiangsuChina Oujiang College Wenzhou UniversityWenzhou325035ZhejiangChina

Let h:E(G)→[0,1]be a *** a≤∑e∋xh(e)≤b holds for each x∈V(G),then we call G[Fh]a fractional[a,b]-factor of G with indicator function h,where Fh={e:e∈E(G),h(e)>0}.A graph G is called a fractional[a,b]-covered graph if for every edge e of G,there is a fractional[a,b]-factor G[Fh]with h(e)=***,Xu and sun[***,***,***,Degree conditions for fractional(a,b,k)-critical covered graphs,Information Processing Letters 152(2019)105838]defined the concept of a fractional(a,b,k)-critical covered graph,i.e.,for every vertex subset Q with|Q|=k of G,G−Q is a fractional[a,b]-covered *** this article,we study the problem of a fractional(2,b,k)-critical covered graph,and verify that a graph G withδ(G)≥3+k is a fractional(2,b,k)-critical covered graph if its toughness t(G)≥1+1b+k2b,where b and k are two nonnegative integers with b≥2+k2.

关键词： Graph Toughness Fractional[a,b]-factor Fractional[a,b]-covered graph Fractional(a,b,k)-critical

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Optimal livelihood strategy for different poverty groups among farmers: a case study of the Qin-Ba Mountain area in South-Shaanxi, China

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Journal of Mountain Science 2020年第5期17卷 1206-1220页

作者： su fang YIN Ya-juan School of Economics and Management Shaanxi University of Science&TechnologyXi'an 710021China

Achieving sustainable livelihood is the ultimate goal of poverty alleviation efforts in mountainous areas,and selecting an optimal livelihood strategy for different poverty-type farmers greatly improves farmers’livelihood capital,resists livelihood risks,and promotes sustainable *** farmers,optimal livelihood strategy means better employment opportunities,higher family income(or better income structure),and stronger employability or development *** paper classifies different types of farmers’poverty on the basis of a quantitative evaluation of farmers’livelihood capital in the Qin-ba Mountain Area in South-Shaanxi by using the k-means clustering method and subsequently the fuzzy evaluation method to evaluate the effectiveness of farmers’livelihood ***,the multi-attribute decision-making model is used to analyze the selection of optimal livelihood strategies for different poverty-type *** results suggest a significant difference in the selection of the optimal livelihood strategy for different poverty-type *** without financial and human capital choose to"go out to work,"farmers lacking natural capital choose to"acquire social insurance and government relief,"farmers without physical capital choose to"use loans,"and farmers lacking social capital choose to"use savings."Studying the selection of optimal livelihood strategies for different poverty-type farmers can help to propose targeted sustainable livelihood optimization programs for farmers and accelerate efforts to overcome poverty in mountainous areas.

关键词： Optimal strategy Livelihood capital Effectiveness evaluation Qin-Ba Mountain Area Shaanxi

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Highly Efficient Base Editing in Viral Genome Based on Bacterial Artificial Chromosome Using a Cas9-Cytidine Deaminase Fused Protein

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Virologica Sinica 2020年第2期35卷 191-199页

作者： Ke Zheng fang-fang Jiang Le su Xin Wang yu-Xin Chen Huan-Chun Chen Zheng-Fei Liu State Key Laboratory of Agricultural Microbiology and Key Laboratory of Preventive Veterinary Medicine in Hubei Province.College of Veterinary Medicine.Huazhong Agricultural University Wuhan 430070China Gene Editing Research Center Hebei University of Science and Technology.Shijiazhuang 050018China

Viruses evolve rapidly and continuously threaten animal health and economy,posing a great demand for rapid and efficient genome editing technologies to study virulence mechanism and develop effective *** present a highly efficient viral genome manipulation method using CRISPR-guided cytidine *** cloned pseudorabies virus genome into bacterial artificial chromosome,and used CRISPR-guided cytidine deaminase to directly convert cytidine(C)to uridine(U)to induce premature stop mutagenesis in viral *** editing efficiencies were 100%.Comprehensive bioinformatic analysis revealed that a large number of editable sites exist in pseudorabies virus(PRV)***,in our study viral genome exists as a plasmid in ***,suggesting that this method is virus *** application of base-editing provided an alternative approach to generate mutant virus and might accelerate study on virulence and vaccine development.

关键词： Pseudorabies virus(PRV) Bacterial artificial chromosome(BAC) Base-editing CRISPR7Cas9 Genome editing

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Study on viscosity mechanism of caffeine crystallization solutions Author links open overlay panel

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Particuology 2024年第8期91卷 341-350页

作者： Linjing yu Min su School of Chemical Engineering Hebei University of TechnologyTianjin300130China

The solid-liquid viscous system formed by high viscosity crystallization solution impacts the flow and separation ***,it is very important to study the viscosity mechanism to improve viscosity and regulate crystallization,ensuring a seamless production ***,the viscosity of crystallization solution was taken as the measurement parameter of caffeine as a model *** investigated the viscosity mechanism of caffeine crystallization solutions by combining experiment and *** results indicated that the weak interactions between caffeine and water result in increased viscosity of the caffeine crystallization ***,caffeine crystals possess elongated needle-like shapes,featuring a substantial specific surface ***,there isπ-πstacking occurring between the(200)crystal face and(110)crystal face,effectively fostering coalescence of the crystals towards the radial side of the crystal along its elongated axis,resulting in a more viscous crystallization *** results contribute to comprehending the viscosity mechanism of crystal systems and provide theoretical foundation to enhance engineering efficiency in crystallization.

关键词： Crystallization Caffeine Viscosity mechanism Molecular simulation

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A hybrid brain-computer interface control strategy in a virtual environment

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Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第5期12卷 351-361页

作者： yu su Qiushi Academy.for Advanced Studies Zhejiang University Hangzhou 310022 China School of Computer Science and Technology Zhejiang University Hangzhou 310027 China Department of Biomedical Engineering Zhejiang University Hangzhou 310027 China Key Laboratory of Biomedical Engineering of the Ministry of Education. Hangzhou 310027.China

This paper presents a hybrid brain-computer interface (BCI) control strategy,the goal of which is to expand control functions of a conventional motor imagery or a P300 potential based BCI in a virtual *** hybrid control strategy utilizes P300 potential to control virtual devices and motor imagery related sensorimotor rhythms to navigate in the virtual *** two electroencephalography (EEG) patterns serve as source signals for different control functions in their corresponding system states,and state switch is achieved in a sequential *** the current system,imagination of left/right hand movement was translated into turning left/right in the virtual apartment continuously,while P300 potentials were mapped to discrete virtual device control commands using a five-oddball *** combination of motor imagery and P300 patterns in one BCI system for virtual environment control was tested and the results were compared with those of a single motor imagery or P300-based *** obtained similar performances in the hybrid and single control tasks,which indicates the hybrid control strategy works well in the virtual environment.

关键词： Hybrid brain-computer interface (BCI) control strategy P300 potential Sensorimotor rhythms Virtual environment

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Design and analysis of spiral bevel gears with seventh-order function of transmission error

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Chinese Journal of Aeronautics 2013年第5期26卷 1310-1316页

作者： su Jinzhan fang Zongde Cai Xiangwei Key Laboratory of Road Construction Technology and Equipment Ministry of EducationChang’an University School of Mechanical Engineering Northwestern Polytechnical University

This paper proposes a new approach to mial function of transmission error （TE） for spiral design and implement a seventh-order polyno- bevel gears with an aim to reduce the running vibration and noise of gear drive and improve the loaded distribution of the tooth. Based on the constraint conditions of predesigned seventh-order polynomial function curve and the theory of linear algebra, the polynomial coefficients of the seventh-order polynomial function of transmission error can be obtained. By applying a method named reverse tooth contact analysis, the modified roll coefficients as well as parts of machine-tool settings for the face-milling of spiral bevel gears can be individually determined. Therefore, a predesigned seventh-order polynomial function of transmission error for spiral bevel gears can be obtained by the modified roll with high-order coef- ficients, and comparisons of the seventh-order polynomial and parabolic functions of transmission error are also performed. The achievement of spiral bevel gears with the seventh-order function of transmission error can be accomplished on a universal Cartesian-type hypoid gear generator or a numerically controlled cradle-style hypoid gear generator due to its simple generating motion of axes of the cradle and the work piece. The results of a numerical example show that the bending stresses of the tooth of seventh-order are less than those of a parabolic one, while the contact stresses remain almost eouivalent.

关键词： Loaded tooth Modified roll Spiral bevel gear Tooth contact analysis Transmissions

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Effect of slag composition and current density on ingot cleanliness during low-frequency/DC electroslag process

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Journal of Iron and Steel Research International 2023年第11期30卷 2219-2228页

作者： yun-long su Tao Jin yu Wang Meng-jun Wang Xiao-fang Shi Li-zhong Chang School of Metallurgy Engineering Anhui University of TechnologyMa’anshan243002AnhuiChina

For in-depth investigation of the effect of low-frequency and DC remelting on the cleanliness of electroslag ingot,laboratory experiments were performed with different current densities and slag compositions to analyze the variation of oxygen content and inclusions in electroslag *** 70%CaF_(2)+30% Al_(2)O_(3) binary slag is used for remelting,the current density has different effects on the cleanliness of electroslag ingots with different power supply *** the power frequency of 2 Hz,the oxygen content and the number of inclusions in the electroslag ingot increase significantly with the increase in remelting current *** contrast,when consumable electrode connected to cathode(DCSP)or consumable electrode connected to anode(DCRP)is employed,the current density has little influence on ingot *** the same current density,DCSP remelting has a more adverse effect on ingot cleanliness compared with DCRP *** with the use of 70%CaF_(2)+30% Al_(2)O_(3) binary slag,using 60%CaF_(2)+20% Al_(2)O_(3) +20%CaO ternary slag significantly reduces the oxygen content and the number of inclusions in electroslag ingots,regardless of whether low-frequency or DC electroslag remelting *** increase in oxygen and inclusions in electroslag ingot is caused by the electrolysis of Al_(2)O_(3) in the slag *** increased inclusions mainly involve Al_(2)O_(3) or Al-containing oxides with small *** regards the power supply mode,low frequency,DCRP,and DCSP promote the electrolysis of Al_(2)O_(3) in the slag *** the perspective of remelting slag composition,the slag with lower Al2O3 content can reduce the pollution of electrolysis on electroslag ingot.

关键词： Electroslag remelting Low frequency DC Slag composition Current density

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