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Risk Factors and Management of Postoperative Pancreatic Fistula Following Pancreaticoduodenectomy:Single-center Experience

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Current Medical Science 2019年第6期39卷 1009-1018页

作者： Zun-xiang ke Jiong-xin XIONG Jin hu Heng-yu CHEN qin LI Yi-qing LI Department of Vascular Surgery Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Department of Pancreatic Surgery Union Hospital Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China key Laboratory of Hormones and Development of the Ministry of Health Tianjin Key Laboratory of Metabolic DiseasesTianjin Metabolic Diseases Hospital and Tianjin Institute of EndocrinologyTianjin Medical UniversityTianjin 300070China

Pancreatic fistula(PF)remains the most frequent complication after pancreaticoduodenectomy(PD).This study was undertaken to explore the risk factors of postoperative PF following PD and discuss the management of PF in our center.A single-center respective study,involving 241 patients who underwent PD between September 2015 and June 2018,was *** in the demographic data,preoperative,intraoperative and postoperative variables between the group with PF[International Study Group on Pancreatic Surgery(ISGPS)grade B/C]and the group without PF(no PF and ISGPS grade BL)were *** diagnosis and grading of PF were in strict accordance with *** factors were analyzed by univariate analysis and multivariate logistic regression *** results showed that postoperative PF occurred in 50(20.7%)of the patients;25(10.4%)patients had a PF type BL,46(19.1%)patients developed a PF type B and 4(1.6%)had a PF type *** analysis showed that fasting blood glucose(P=0.02),pancreatic texture(P<0.001)and pancreatic duct diameter(P=0.01)were correlated with *** logistic regression analysis identified one independent risk factor for postoperative PF:soft pancreatic texture(OR=3.251,P=0.002).Among the cases,there were three postoperative deaths,giving a 60-day hospital mortality rate of 1.2%(3/241),and the mortality related to PF was 4.0%(2/50).One of the patients died from multiple organ failure caused by postoperative abdominal *** conclusion,soft pancreatic texture is an independent risk factor for *** should be well aware of this risk factor when performing a PD.

关键词： pancreaticoduodenectomy pancreatic fistulae risk factors complication pancreatic texture

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Time-Dependent Demographic Prediction Based on Time-Back-Propagation Method

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Chinese Journal of Electronics 2018年第1期27卷 35-40页

作者： ke Yuyang XIONG Yan hu Yiqing LIU Shichen School of Computer Science University of Science and Technology of China Department of Computer Science Hefei University

In various applications like personalized search and recommendation, full demographic information is a precondition for many applications’ well performance,but such ideal dataset rarely exists in practical ***’s worse, absence of key characteristics(e.g., baby’s age in maternal and infant commodity recommendation)makes these applications struggle. We design a novel solution to solve the problem of time-dependent demographic prediction. The key insight behind our approach is, we leverage a Time-back-propagation(TBP) method to take the internal time correlation of historical behaviours into consideration and collect all available data to train a classifier, which is a mapping from user’s historical behaviours to the demographic information. We demonstrate the effectiveness of our method through experiments of baby’s age prediction. Our algorithm performs more balanced on each age group, and can predict Baby’s age(BA) accurately in 78.2% on a real-world dataset with 2,058,909 items of a ma jor E-commerce site.

关键词： Time-back-propagation(TBP) Time series Time-dependent demographic prediction

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Gauss Sum of Index 4:(2)Non-cyclic Case

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Acta Mathematica Sinica,English Series 2006年第3期22卷 833-844页

作者： Jing YANG Shi Xin LUO ke qin FENG Department of Mathematical Science Tsinghua University

Assume that m ≥ 2, p is a prime number, （m,p（p - 1）） = 1,-1 not belong to 〈p〉 belong to （Z/mZ）^＊ and [（Z/mZ）^＊：〈p〉]=*** this paper, we calculate the value of Gauss sum G（X）=∑x∈F^＊x（x）ζp^T（x） over Fq,where q=p^f,f=φ（m）/4,x is a multiplicative character of Fq and T is the trace map from Fq to *** our assumptions,G（x） belongs to the decomposition field K of p in Q（ζm） and K is an imaginary quartic abelian unmber *** the Galois group Gal（K/Q） is cyclic,we have studied this cyclic case in anotyer paper：＂Gauss sums of index four：（1）cyclic case＂（accepted by Acta Mathematica Sinica,2003）.In this paper we deal with the non-cyclic case.

关键词： Gauss sum Stickelberger Theorem Davenport-Hawse formula class number of imaginary quadratic field

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Oblique and Herringbone Buckling Analysis of Steel Strip by Spline FEM

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Journal of Iron and Steel Research International 2011年第9期18卷 21-26页

作者： qin Jian ZHANG qing-dong huANG ke-fu College of Engineering Peking University Beijing 100871 China Mechanical Engineering School University of Science and Technology Beijing Beijing 100083 China

The tilted waves in steel strip during rolling and leveling of sheet metal can be classified into two different types of buckling, oblique and herringbone buckling, respectively. Numerical considerations of oblique and herringbone buckling phenomena are dealt with by the spline finite element method （FEM）. It is pointed out that the shear stress due to residual strains caused by the rolling process or applied non-uniform loading is the main reason of oblique and herringbone buckle. According to the analysis of stress distribution in plane, the appropriate initial strain patterns are adopted and the corresponding buckling modes are calculated by the spline FEM. The developed numerical model provides an estimation of buckling critical load and wave configuration.

关键词： steel strip spline FEM initial strain oblique buckling herringbone buckling

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Molecular cloning,characterization and expression profile of the sucrose synthase gene family in Litchi chinensis

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Horticultural Plant Journal 2021年第6期7卷 520-528页

作者： Dan Wang Jietang Zhao Yaqi qin Yonghua qin Guibing hu State key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources/key Laboratory of Biology and Genetic Improvement of Horticultural Crops(South China) Ministry of Agriculture and Rural Affairs/Guangdong Litchi Engineering Research CenterCollege of HorticultureSouth China Agricultural UniversityGuangzhou 510642China

Sucrose synthase(SUS,EC 2.***.1.13)is widely considered as a key enzyme involved in plant sucrose metabolism,and the gene family encoding different SUS isozymes has been identified and characterized in several plant ***,to date scant information about the SUS genes is available in Litchi chinensis ***,we identified five SUS genes in *** Lc SUSs shared high levels of similarity in both nucleotide and amino acid *** gene structure,phylogenetic relationships,and expression profiles were *** structure analysis indicated that the Lc SUSs have similar exon-intron *** analysis revealed that the five members could be classified into three groups(LcSUS1 and LcSUS2 in SUSⅡ,LcSUS4 and LcSUS5 in SUSⅢ,and LcSUS3 in SUSⅠ),demonstrating evolutionary conservation in the SUS family across litchi and other plant *** expression levels of Lc SUSs were investigated via real-time PCR in various tissues and different developmental stages of *** tissues and organs,Lc SUSs exhibited distinct but partially redundant expression profiles in litchi,being predominantly expressed in young leaves(sink).During aril development,the expression pattern of LcSUS1 was consistent with the trend of sugar accumulation,indicating it may play important roles in determination of sink strength in ***,transcript levels of LcSUS2,LcSUS4,and LcSUS5 varied between cultivars with different hexose/sucrose ratios,which may regulate the sugar composition in *** results provide insights into physiological functions of SUS genes in litchi,especially roles in regulating sugar accumulation in aril.

关键词： Litchi chinensis Sucrose synthase Gene expression Aril Sugar accumulation

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Denoising Graph Inference Network for Document-Level Relation Extraction

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Big Data Mining and Analytics 2023年第2期6卷 248-262页

作者： Hailin Wang ke qin Guiduo Duan Guangchun Luo School of Computer Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China School of Computing and Artificial Intelligence Southwestern University of Finance and EconomicsChengdu 611130China

Relation Extraction(RE)is to obtain a predefined relation type of two entities mentioned in a piece of text,e.g.,a sentence-level or a document-level *** existing studies suffer from the noise in the text,and necessary pruning is of great *** conventional sentence-level RE task addresses this issue by a denoising method using the shortest dependency path to build a long-range semantic dependency between entity ***,this kind of denoising method is scarce in document-level *** this work,we explicitly model a denoised document-level graph based on linguistic knowledge to capture various long-range semantic dependencies among *** first formalize a Syntactic Dependency Tree forest(SDT-forest)by introducing the syntax and discourse dependency ***,the Steiner tree algorithm extracts a mention-level denoised graph,Steiner Graph(SG),removing linguistically irrelevant words from the *** then devise a slide residual attention to highlight word-level evidence on text and ***,the classification is established on the SG to infer the relations of entity *** conduct extensive experiments on three public *** results evidence that our method is beneficial to establish long-range semantic dependency and can improve the classification performance with longer texts.

关键词： Relation Eextraction(RE) document-level denoising linguistic knowledge attention mechanism

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Gauss Sum of Index 4:(1)Cyclic Case

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Acta Mathematica Sinica,English Series 2005年第6期21卷 1425-1434页

作者： ke qin FENG Jing YANG Shi Xin LUO Department of Mathematical Science Tsinghua University Beijing 100084 P. R. China

Let p be a prime, m ≥ 2, and （m,p（p - 1）） = 1. In this paper, we will calculate explicitly the Gauss sum G（X） = ∑x∈F＊qX（x）ζ^Tp^（x） in the case of [（Z/mZ）＊：（p）] = 4, and -1 （不属于）（p）, wher... 详细信息

Let p be a prime, m ≥ 2, and （m,p（p - 1）） = 1. In this paper, we will calculate explicitly the Gauss sum G（X） = ∑x∈F＊qX（x）ζ^Tp^（x） in the case of [（Z/mZ）＊：（p）] = 4, and -1 （不属于）（p）, where q P^f, f =φ（m）/4, X is a multiplicative character of Fq with order m, and T is the trace map for Fq/Fp. Under the assumptions [（Z/mZ）＊：（p）] = 4 and 1（不属于）（p）, the decomposition field of p in the cyclotomic field Q（ζm） is an imaginary quartic （abelian） field. And G（X） is an integer in K. We deal with the case where K is cyclic in this oaDer and leave the non-cvclic case to the next paper.

关键词： Gauss sum Stickelberger theorem Davenport-Hasse formula cyclic quartic number field

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Study on complicated solid modeling and Cartesian grid generation method

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Science China(Technological Sciences) 2014年第3期57卷 630-636页

作者： qin Qiang hu ChangZhen MA TianBao School of Computer Science and Technology Beijing Institute of Technology School of Software Beijing Institute of Technology State key Laboratory of Explosion Science and Technology Beijing Institute of Technology

A Cartesian grid generation method is developed in this *** kinds of solid modeling methods,CSG and STL models,are used for complicated solid *** staircase boundary approximation is implemented to handle irregular geometries and the computational domain is discretized using a regular Cartesian *** the edge-based integral slice algorithm,the models are sliced with a set of parallel planes to generate 2D slices *** scan line filling technique is used to achieve grid generation after *** grid generation examples with a CSG model and a STL model are given to test the capability of the grid generation *** grid displaying,a method is proposed to remove the hidden surfaces fasten based on the topology of orthogonal hexahedral *** parallelization of grid displaying is achieved by employing multi-threaded parallel *** test results show that the parallel algorithm has the absolute advantage on speed compared to the serial algorithm.

关键词： solid modeling grid generation Cartesian grid staircase boundary treatment

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A rate-based method for dynamic analysis and optimal design of reactive extraction: n-Hexyl acetate esterification as an example

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Chinese Journal of Chemical Engineering 2020年第1期28卷 76-83页

作者： Xutao hu Hao qin Biao hu Hongye Cheng Lifang Chen Zhiwen Qi Max Planck Partner Group at the State key Laboratory of Chemical Engineering School of Chemical Engineering East China University of Science and Technology

The dynamic analysis and optimal design of reactive extraction are challenging due to high nonlinearity of model equations and tough decision of judging criteria. In this work, a dynamic rate-based method is developed on g PROMS platform to get easy access to the solutions of reactive extraction with phase splitting. Based on rigorous criteria, dynamic analysis from initial state to final equilibrium(e.g., evolution of phase composition, mass transfer rate and reaction rate) and optimal design of operating conditions(e.g., extractant dosage and feed molar ratio) are achieved. To illustrate the method, the esterification of n-hexyl acetate is taken as an example. The approach proves to be reliable in the analysis and optimization of the exemplified system, which provides instructive reference for further process design and simulation of reactive extraction.

关键词： Reactive extraction Dynamic rate-based method Optimal design Process simulation n-Hexyl acetate esterification

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Effect of casting speed on surface quality of horizontal direct chill casting 7075 aluminum alloy ingot

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Acta Metallurgica Sinica(English Letters) 2011年第5期24卷 399-404页

作者： qingfeng Zhu Zhihao ZHAO Jianzhong CUI Xiangjie WANG ke qin key Laboratory of Electromagnetic Processing of Materials Ministry of Education Northeastern University Shenyang 110819 China

7075 aluminum alloy ingot with the diameter izontal direct chill casting in different casting of 100 mm has been produced by horspeed. The effect of the casting speed on the ingot surface and subsurface layer was studied by surface observation and subsurface structure analysis. It was found that increasing the casting speed results in the adding of segregation knots in the ingot surface. The thickness of the dendrite microstrueture layer in the subsurface reduces with increasing the casting speed. And the elements of Zn, Cu and Mg enrich in the coarse dendrite microstructure layer of the ingot.

关键词： Horizontal direct chill casting Casting speed 7075 aluminumalloy Surface quality

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