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Counting Rooted Unicursal Planar Maps

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Acta Mathematicae Applicatae Sinica 2013年第4期29卷 749-764页

作者： Shu-de LONG Jun-liang cai Department of Mathematics Chongqing University of Arts and Sciences School of Mathematical Sciences Beijing Normal University

This paper investigates the number of rooted unicursal planar maps and presents some formulae for such maps with four parameters： the numbers of nonrooted vertices and inner faces and the valencies of two odd vertices.

关键词： unicursal planar map enumerating function functional equation Lagrangian inversion

Counting Rooted 4-regular Unicursal Planar Maps

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Acta Mathematicae Applicatae Sinica 2017年第4期33卷 909-918页

作者： Shu-de LONG Jun-liang cai Department of Mathematics Chongqing University of Arts and Sciences School of Mathematical Sciences Beijing Normal University

A map is 4-regular unicursal if all its vertices are 4-valent except two odd-valent vertices. This paper investigates the number of rooted 4-regular unicursal planar maps and presents some formulae for such maps with ... 详细信息

关键词： unicursal planar map enumerating function functional equation Lagrangian inversion

OD-characterization of Almost Simple Groups Related to U_3(5)

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Acta Mathematica Sinica,English Series 2010年第1期26卷 161-168页

作者： liang cai ZHANG Wu Jie SHI School of Mathematical Sciences Suzhou University Suzhou 215006 P. R. China College of Mathematics and Physics Chongqing University Shapingba 400044 P. R. China

Let G be a finite group with order ｜G｜=p1^α1p2^α2……pk^αk, where p1 〈 p2 〈……〈 Pk are prime numbers. One of the well-known simple graphs associated with G is the prime graph （or Gruenberg- Kegel graph） denoted .by г（G）（or GK（G））. This graph is constructed as follows： The vertex set of it is π（G） = {p1,p2,…,pk} and two vertices pi, pj with i≠j are adjacent by an edge （and we write pi - pj） if and only if G contains an element of order pipj. The degree deg（pi） of a vertex pj ∈π（G） is the number of edges incident on pi. We define D（G）：= （deg（p1）, deg（p2）,..., deg（pk））, which is called the degree pattern of G. A group G is called k-fold OD-characterizable if there exist exactly k non- isomorphic groups H such that ｜H｜ = ｜G｜ and D（H） = D（G）. Moreover, a 1-fold OD-characterizable group is simply called OD-characterizable. Let L ：= U3（5） be the projective special unitary group. In this paper, we classify groups with the same order and degree pattern as an almost simple group related to L. In fact, we obtain that L and L.2 are OD-characterizable; L.3 is 3-fold OD-characterizable; L.S3 is 6-fold OD-characterizable.

关键词： almost simple group prime graph degree of a vertex degree pattern

Apoptotic mechanism of premature ovarian failure and rescue effect of Traditional Chinese Medicine: a review

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Journal of Traditional Chinese Medicine 2021年第3期41卷 491-498页

作者： cai liang ZONG Daokuan TONG Guoqing LI Li Department of Reproductive Center Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghai 201203China

Social and environmental factors render premature ovarian failure(POF) as a major cause of decline or loss of female fertility. The natural pregnancy rate of patients with POF is only 5%-10%. Follicular atresia is the main factor in the pathogenesis of *** to the unique ovarian physiological environment and follicular developmental processes, the apoptosis of ovarian granulosa cells and oocytes together cause follicular atresia, which involves the apoptosis-related internal and external ***, during POF, apoptosis and oxidative stress forms a "vicious circle", which involves a variety of changes between the molecules. The existing pharmaceutical preparations such as gonadal hormones are the basic methods for the treatment of POF, and the curative effect was affirmative;however, it was ineffective after withdrawn, while the long-term application led to adverse reactions. Traditional Chinese Medicine(TCM) has a history of treating gynecological diseases and infertility and has gained increasing attention. Studies have shown that compounds isolated from herbal medicine exerted a positive effect on follicular atresia caused by cell apoptosis that also improved the POF. The present study reviewed the mechanisms underlying the apoptosis in POF and elaborated the internal mechanism of TCM in the treatment of the condition.

关键词： primary ovarian insufficiency apoptosis oxidative stress drugs Chinese herbal review

Tunable Cis-cisoid Helical Conformation of Poly(3,5-disubstibuted phenylacetylene)s Stabilized by Interaction

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Chinese Journal of Polymer Science 2020年第7期38卷 685-695,I0005页

作者： Sheng Wang Si-liang cai Jie Zhang Xin-Hua Wan Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

A series of novel cis poly(phenylacetylene)s(PPAs)substituted at meta-position(s)by two alkoxycarbonyl pendants,Le.,sP-Me-C8/rP-Me-C8,P-Me-C12,sP-Et-C4,sP-2C4 and sP-Oct-C4,were synthesized under the catalysis of[Rh(nbd)Cl]2(nbd=norbornadiene).The dependence of elongation,screw sense,and stimuli response of helical polyene backbone on the structure of pendant,solvent,and temperature was systematically investigated in both solution and solid *** of n→π*interaction between vicinal carbonyl groups,sP-Me-C8/rP-Me-C8 could adopt contracted cis-cisoid helix in THF,toluene,CH2Cl2,and *** an intramolecular interaction was sensitive to the hydrogen bond donating ability of solvent and temperature,but insensitive to the dielectric constant and polarity of *** poly(3-methoxycarbonyl-5-alkoxycarbonylphenylacetylene),the longer the chiral alkyl chain was,the easier the stable cis-cisoid helix could be ***,when the methoxycarbonyl was changed to ethoxycarbonyl,sec-butyloxycarbonyl,and octyloxycarbonyl pendant groups,only cistransoid helix was obtained at room temperature due to the increased steric ***,lowering temperature was found to facilitate the stabilization of n→π*interactions,and reversible temperature-dependent stereomutations were achieved in sP-Me-C8 and sP-Et-C4depending on the solvent where they were *** results suggested that the long alkyl chain,small pendant size,and lower temperature favored the stabilization of intramolecular n→π*interactions and the formation of contracted,cis-cisoid helices for poly(3,5-diestersubstituted phenylacetylene)s.

关键词： Polyphenylacetylenes Cis-cisoid,Cis-transoid n→π*Interactions,Helical conformation

Particle residence time distribution and axial dispersion coefficient in a pressurized circulating fluidized bed by using multiphase particle-in-cell simulation

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Chinese Journal of Chemical Engineering 2024年第5期69卷 167-176页

作者： Jinnan Guo Daoyin Liu Jiliang Ma cai liang Xiaoping Chen Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education Southeast UniversityNanjing 210096China

The particle residence time distribution(RTD)and axial dispersion coefficient are key parameters for the design and operation of a pressurized circulating fluidized bed(PCFB).In this study,the effects of pressure(0.1-0.6 MPa),fluidizing gas velocity(2-7 m·s^(-1)),and solid circulation rate(10-90 kg·m^(-2)·s^(-1))on particle RTD and axial dispersion coefficient in a PCFB are numerically investigated based on the multiphase particle-in-cell(MP-PIC)*** details of the gas-solid flow behaviors of PCFB are *** on the gas-solid flow pattern,the particles tend to move more orderly under elevated *** an increase in either fluidizing gas velocity or solid circulation rate,the mean residence time of particles decreases while the axial dispersion coefficient *** an increase in pressure,the core-annulus flow is strengthened,which leads to a wider shape of the particle RTD curve and a larger mean particle residence *** back-mixing of particles increases with increasing pressure,resulting in an increase in the axial dispersion coefficient.

关键词： Pressurized circulating fluidized bed MP-PIC method Residence time distribution Axial dispersion coefficient

Experimental study of the solid circulation rate in a pressurized circulating fluidized bed

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Particuology 2021年第3期19卷 207-214页

作者： Jinding Hu Daoyin Liu Heng Li cai liang Xiaoping Chen Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education Southeast UniversityNanjing 210096China

The solid circulation rate is essential for design of pressurized circulating fluidized beds(PCFBs).With increasing pressure from atmospheric pressure to a few bars,the gas density linearly increases with the pressure,which affects the gas-solid flow *** this work,experiments were performed at room temperature in a cold PCFB apparatus with a riser of 3.3 m in height and 0.05 m in *** solid circulation rate was studied from 20 to 80 kg/(m^(2)·s)under various conditions with increasing pressure from 0.1 to 0.6 MPa and fluidizing gas velocity from around 1.5 to 8.0 m/s for different Geldart B group *** of the conditions were in the flow regimes of core-annulus flow(CAF)only and CAF with a turbulent fluidized bed at the *** trend of the apparent slip factor with the dimensionless slip velocity was similar at different pressures and for different average particle sizes,and it converged to an exponential *** empirical equation was obtained by fitting the solid circulation rate with the operating parameters(particle transport velocity,particle volume fraction,Archimedes number,and Froude number),which is helpful for design and operation of PCFBs.

关键词： Pressurized Circulating fluidized bed Solid circulation rate Particle volume fraction Gas-solid slip velocity

Electrochemical behavior of 304 stainless steel with electrodeposited niobium as PEMFC bipolar plates

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International Journal of Minerals,Metallurgy and Materials 2012年第4期19卷 328-332页

作者： Cheng-hao liang cai-hong Cao Nai-bao Huang Transportation Equipments and Ocean Engineering College Dalian Maritime University Dalian 116026 China

In order to enhance the corrosion resistance of 304 stainless steel, niobium was electrodeposited on its surface in air- and water-stable ionic liquids. The electrochemical behaviors of bare and niobium-coated 304 stainless steel were evaluated by electrochemical tests in a simulated proton exchange membrane fuel cell （PEMFC） environment. The results showed that niobium could be electrodeposited on the surface of 304 stainless steel from ionic liquids, and a smooth and strong chemical inert compound film was obtained on the surface of 304 stainless steel, which was mainly composed of NbO and Nb2Os. The thin composite film acted as a barrier and remarkably improved the corrosion resistance of 304 stainless steel in the PEMFC environment.

关键词： proton exchange membrane fuel cells electrodeposition niobium ionic liquids stainless steel corrosion resistance

Oscillating field stimulation promotes neurogenesis of neural stem cells through miR-124/Tal1 axis to repair spinal cord injury in rats

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Neural Regeneration Research 2023年第4期18卷 895-900页

作者： Chao Fang Jian Sun Jun Qian cai-liang Shen Department of Orthopedics&Spine Surgery The First Affiliated Hospital of Anhui Medical UniversityHefeiAnhui ProvinceChina Department of Orthopedics The Second Affiliated Hospital of Anhui Medical UniversityHefeiAnhui ProvinceChina

Spinal cord injury often leads to severe motor and sensory deficits,and prognosis using the currently available therapies remains ***,we aimed to explore a novel therapeutic approach for improving the prognosis of spinal cord *** this study,we implanted oscillating field stimulation devices and transplanted neural stem cells into the thoracic region(T9–T10)of rats with a spinal cord ***-Beattie-Bresnahan scoring revealed that oscillating field stimulation combined with neural stem cells transplantation promoted motor function recovery following spinal cord *** addition,we investigated the regulation of oscillating field stimulation on the miR-124/Tal1 axis in neural stem *** of lentivirus was performed to investigate the role of Tal1 in neurogenesis of neural stem cells induced by oscillating field *** reverse transcription-polymerase chain reaction,immunofluorescence and western blotting showed that oscillating field stimulation promoted neurogenesis of neural stem cells in vitro and in *** and eosin staining showed that oscillating field stimulation combined with neural stem cells transplantation alleviated cavities formation after spinal cord *** the results together,we concluded that oscillating field stimulation decreased miR-124 expression and increased Tal1 content,thereby promoting the neurogenesis of neural stem *** combination of oscillating field stimulation and neural stem cells transplantation improved neurogenesis,and thereby promoted structural and functional recovery after spinal cord injury.

关键词： miR-124 neural stem cell neurogenesis oscillating field stimulation recovery spinal cord injury Tal1 tissue repair transplantation