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Regular Maps of Graphs of Order 4p

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Acta Mathematica Sinica,English Series 2012年第5期28卷 989-1012页

作者： Jin Xin ZHOU yan quan feng Department of Mathematics Beijing Jiaotong University

A 2-cell embedding f ： X → S of a graph X into a closed orientable surface S can be described combinatorially by a pair M = （X; p） called a map, where p is a product of disjoint cycle permutations each of which is the permutation of the arc set of X initiated at the same vertex following the orientation of S. It is well known that the automorphism group of M acts semi-regularly on the arc set of X and if the action is regular, then the map M and the embedding f are called regular. Let p and q be primes. Duet al. [J. Algebraic Combin., 19, 123 141 （2004）] classified the regular maps of graphs of order pq. In this paper all pairwise non-isomorphic regular maps of graphs of order 4p are constructed explicitly and the genera of such regular maps are computed. As a result, there are twelve sporadic and six infinite families of regular maps of graphs of order 4p; two of the infinite families are regular maps with the complete bipartite graphs K2p,2p as underlying graphs and the other four infinite families are regular balanced Cayley maps on the groups Z4p, Z22 × Zp and D4p.

关键词： Regular map Cayley map algebraic map 2-cell embedding

Two sufficient conditions for non-normal Cayley graphs and their applications

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Science China Mathematics 2007年第2期50卷 201-216页

作者： Jin-xin ZHOU yan-quan feng Department of Mathematics Beijing Jiaotong UniversityBeijing 100044China

A Cayley graph Cay(G, S) on a group G is said to be normal if the right regular representation R(G) of G is normal in the full automorphism group of Cay(G, S). In this paper, two sufficient conditions for non-normal Cayley graphs are given and by using the conditions, five infinite families of connected non-normal Cayley graphs are constructed. As an application, all connected non-normal Cayley graphs of valency 5 on A 5 are determined, which generalizes a result about the normality of Cayley graphs of valency 3 or 4 on A 5 determined by Xu and Xu. Further, we classify all non-CI Cayley graphs of valency 5 on A 5, while Xu et al. have proved that A 5 is a 4-CI group.

关键词： Cayley graph normal Cayley graph arc-transitive graph 05C25 20B25

Cubic vertex-transitive non-Cayley graphs of order 12p

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Science China Mathematics 2018年第6期61卷 1153-1162页

作者： Wei-Juan Zhang yan-quan feng Jin-Xin Zhou Department of Mathematics Beijing Jiaotong University Beijing 100044 China

A graph is said to be vertex-transitive non-Cayley if its full automorphism group acts transitively on its vertices and contains no subgroups acting regularly on its vertices. In this paper, a complete classification of cubic vertex-transitive non-Cayley graphs of order 12 p, where p is a prime, is given. As a result, there are 11 sporadic and one infinite family of such graphs, of which the sporadic ones occur when p equals 5, 7 or 17, and the infinite family exists if and only if p ≡ 1(mod 4), and in this family there is a unique graph for a given order.

关键词： Cayley graphs vertex-transitive graphs automorphism groups

A Family of Nonnormal Cayley Digraphs

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Acta Mathematica Sinica,English Series 2001年第1期17卷 147-152页

作者： yan quan feng Dian Jun WANG Jing Lin CHEN Department of Mathematics Northern JiaoTong University Department of Mathematics Tsinghua University Department of Mathematics Tangshan Normal College

We call a Cayley digraph Γ=Cay(G, S) normal for G if G_R, the right regular representation of G, is a normal subgroup of the full automorphism group Aut(Γ) of Γ. In this paper we determine the normality of Cayley digraphs of valency 2 on nonabelian groups of order 2p^2 (p odd prime). As a result, a family of nonnormal Cayley digraphs is found.

关键词： Cayley digraph Normal Cayley digraph

Role of Receptor Component Protein （RCP） in CGRP and Angiotensin II on Vascular Peroxidase -1 Expression in Vascular Smooth Muscle Cell

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中国动脉硬化杂志 2013年第9期21卷 I0080-I0081页

作者： yan-Mei Liu Hai-yan quan Gao-feng Jiang feng Guo Xu-Ping Qin (Institute of Pharmacy and Pharmacology University of South China Hengyang Hunan 421001 China)

Aim To determine the role of receptor component protein (RCP) in calcitonin gene-related peptide (CGRP) and angiotensin 11 sig- nal transduction in action of vascular peroxidase-1 ( VPO1 ) in VSMC. Methods Mouse vascular smooth muscle cell line A10 (A10VSMC) was employed in the study. Western blot was used to detect the expression of RCP and VPO1 protein. RT-PCR was used to detect the expression of RCP and VPO1mRNA. RCP-specific small interference RNA (RCP-siRNA) was used to silence oli- gonucleotide sequence, co-immunoprecipitation was used to determine interaction of RCP and G~xs/G[3/G~/. Results Both CGRP and angiotensin ]1 up-regulated the expression of RCP while CGRP down- regulated the expression of RCP induced by angioten- sinⅡin VSMC ; AngiotensinⅡup-regulated the expression of VPOI in a concentration and time-dependent manner in VSMC ; CGRP inhibited the expression of VPO1 induced by angiotensinⅡand the effect of CGRP was enhanced by Catalase, H:O:scavenger.

关键词：降钙素基因相关肽血管平滑肌细胞血管紧张素Ⅱ 过氧化物酶蛋白成分受体 RT-PCR法 CGRP

Roles of nanoparticles in arsenic mobility and microbial community composition in arsenic-enriched soils

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Journal of Environmental Sciences 2024年第4期138卷 301-311页

作者： Ting Luo Qining Zheng Jie Yu Weihao Liang yan Sun Guixiang quan feng Zhou School of Environmental Science and Engineering Yancheng Institute of TechnologyYancheng 224051China Jiangsu Provincial Key Laboratory of Coastal Ecology and Pollution Control Yancheng 224051China School ofEnvironment and Civil Engineering Jiangnan UniversityWuxi 214122China

Environmental effects of nano remediation engineering of arsenic(As)pollution need to be *** this study,the roles of Fe_(2)O_(3)and TiO_(2)nanoparticles(NPs)on the microbial mediated As mobilization from As contaminated soil were *** addition of Fe_(2)O_(3)and TiO_(2)NPs restrained As(V)release,and stimulated As(Ⅲ)***(V)concentration decreased by 94% and 93% after Fe_(2)O_(3)addition,and decreased by 89% and 45% after Ti O_(2)addition compared to the Biotic and Biotic+Acetate(amended with sodium acetate)controls,*** maximum values of As(Ⅲ)were 20.5 and 27.1μg/L at 48 d after Fe_(2)O_(3)and TiO_(2)NPs addition,respectively,and were higher than that in Biotic+Acetate control(12.9μg/L).The released As co-precipitated with Fe in soils in the presence of Fe_(2)O_(3)NPs,but adsorbed on TiO_(2)NPs in the presence of TiO_(2)***,the addition of NPs amended with sodium acetate as the electron donor clearly promoted As(V)reduction induced by *** NPs addition changed the relative abundance of soil bacterial community,while Proteobacteria(42.8%-70.4%),Planctomycetes(2.6%-14.3%),and Firmicutes(3.5%-25.4%)were the dominant microorganisms in *** potential As/Fe reducing bacteria were related to Pseudomonas,Geobacter,Desulfuromonas,and *** addition of Fe_(2)O_(3)and TiO_(2)NPs induced to the decrease of arr A *** results indicated that the addition of NPs had a negative impact on soil microbial population in a long *** findings offer a relatively comprehensive assessment of Fe_(2)O_(3)and TiO_(2)NPs effects on As mobilization and soil bacterial communities.

关键词： Fe_(2)O_(3)and TiO_(2)nanoparticles Arsenic reduction Mobilization Functional gene Microbial community

Intestinal Behçet's disease: A review of clinical diagnosis and treatment

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World Journal of Gastrointestinal Surgery 2024年第6期16卷 1493-1500页

作者： Ying Liu feng Gao Ding-quan yang yan Jiao Department of General Surgery The Affiliated Hospital to Changchun University of Chinese MedicineChangchun 130021Jilin ProvinceChina Department of Gastrointestinal and Colorectal Surgery China-Japan Union Hospital of Jilin UniversityChangchun 130033Jilin ProvinceChina Department of Hepatobiliary and Pancreatic Surgery General Surgery CenterThe First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina

Behçet's disease(BD)is a chronic inflammatory disorder prone to frequent re-currences,with a high predilection for intestinal ***,the ef-ficacy and long-term effects of surgical treatment for intestinal BD are *** the current issue of World J Gastrointest Surg,Park et al conducted a retrospec-tive analysis of 31 patients with intestinal BD who received surgical *** found that elevated C-reactive protein levels and emergency surgery were poor prognostic factors for postoperative recurrence,emphasizing the adverse impact of severe inflammation on the prognosis of patients with intestinal *** work has clinical significance for evaluating the postoperative condition of intestinal *** editorial attempts to summarize the clinical diagnosis and treatment of intestinal BD,focusing on the impact of adverse factors on surgical *** hope this review will facilitate more precise postoperative management of patients with intestinal BD by clinicians.

关键词： Intestinal Behçet's disease Diagnosis Treatment Surgery Recurrence

Preparation and Characterization of Biobased Dehydroabietyl Polyethylene Glycol Glycidyl Ether-Grafted Hydroxyethyl Cellulose with High Emulsifying Property

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Journal of Renewable Materials 2024年第1期12卷 103-117页

作者： Zhengqing Ding quan yang Xinyan yan feng Gu Xujuan Huang Zhaosheng Cai School of Chemical and Chemistry Yancheng Institute of TechnologyYancheng224051China

Dehydroabietyl polyethylene glycol glycidyl ether-grafted hydroxyethyl cellulose(HEC)polymer surfactant(DA(EO)5GE-g-HEC)was prepared using ring-opening polymerization with biobased rosin and hydroxyethyl cellulose as *** polyethylene glycol glycidyl ether(DA(EO)5GE)was formed by condensation of dehydroabietyl alcohol polyoxyethylene ether(Rosin derivative:DA(EO)5H)and *** grafting degree of DA(EO)5GE-g-HEC was manipulated by adjusting the mass ratio of HEC and DA(EO)5GE and confirmed by *** to the formula,when m(HEC)/m(DA(EO)2GE)was 1:1~1:5,the grafting rate of DA(EO)5GE in DA(EO)5GE-g-HEC varied from 34.43%to 38.33%.The surface activity and foam properties of DA(EO)5GE-g-HEC aqueous solution were *** results showed that with the increase in grafting rate,the critical micellar concentration(CMC)in aqueous solution changed from 1.28 to 0.96 g/*** results of the thermogravimetric analysis showed that the temperature range of the main stage of mass loss of DA(EO)5GE-g-HEC was 310°C~410°C,and the thermal decomposition processes of the samples with five mass ratios were *** oil in water emulsion was prepared by choosing cyclohexane as the oil phase and DA(EO)5GE-g-HEC as the *** effect of DA(EO)5GE-g-HEC mass fraction on emulsion particle size and stability was *** results suggested that when the oil-water ratio was 8:2 with 0.4%emulsifier,the emulsion droplets were the smallest in terms of particle size and were the most *** rheological test results showed that the apparent viscosity decreased with the increase in shear rate and showed a typical elastic gel phenomenon.

关键词： Rosin hydroxyethyl cellulose surfactant emulsion rheological behaviour

Thermal-force control ability under variation of electromagnetic stick structure parameters in RPECT

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Journal of Iron and Steel Research International 2024年第1期31卷 224-236页

作者： Ting-song yang Wen-quan Sun feng-shan Du An-rui He quan yang National Engineering Research Center of Advanced Rolling and Intelligent Manufacturing University of Science and Technology BeijingBeijing100083China Institute of Engineering and Technology University of Science and Technology BeijingBeijing100083China College of Mechanical Engineering Yanshan UniversityQinhuangdao066004HebeiChina

Thermal-force driving of roll profile electromagnetic control technology(RPECT),which can be used to adjust the roll profile,can be affected by the sequential temperature rise between the electromagnetic stick(ES)and electromagnetic control *** to the limited space of ES and induction coil,the cross-sectional area of induction coil can be inevitably affected by changing the size of the ES induction zone,which can further change the energy input under the same electromagnetic parameters,the temperature rising effect and the bulging *** investigate this phenomenon,the effects of the radius of the induction zone on the thermal-force contribution ratio,the heating ability of ES and the temperature distribution were analyzed through an electromagnetic-thermal-structural finite element *** ensure that the results are applicable to RPECT,the thermal energy conversion ability and thermal-force roll crown control ability under different lengths of the induction zone were *** was found that whether the current density regulation mode or the current frequency regulation mode is adopted,the cases with 20 or 25 mm radius of the induction zone have the great thermal energy conversion ability and the good thermal-force roll crown control *** reasonable adjustment of the length of the induction zone can reduce the radius required for the maximum energy efficiency *** with the results of the simulation analysis,the optimization of ES based on the control ability maximization requirement is achieved,which provides the base for the design and configuration of ES in RPECT.

关键词： Roll profile electromagnetic control technology Electromagnetic stick Electromagnetic control roll Induction area Thermal-force driving