CAVITY FORMATION AND ITS VIBRATION FOR A CLASS OF GENERALIZED INCOMPRESSIBLE HYPER-ELASTIC MATERIALS

The problem of radial symmetric motion for a solid sphere composed of a class of generalized incompressible neo-Hookean materials, subjected to a suddenly applied surface tensile dead load, is examined.The analytic solutions for this problem and the motion equation of cavity that describes cavity formation and growth with time are obtained. The e?ect of radial perturbation of the materials on cavity formation and its motion is discussed. The plane of the perturbation parameters of the materials is divided into four regions. The existential conditions and qualitative properties of solutions of the motion equation of the cavity are studied in di?erent parameters’ regions in detail. It is proved that the cavity motion with time is a nonlinear periodic vibration. The vibration center is then determined.

Generalized Gr?tzsch ring function and generalized elliptic integrals

Abstract. In this paper, we study the quotient of hypergeometric functions μα （r） in the theory of Ramanujan＇s generalized modular equation for α ∈（0, 1/2]. Several new inequalities are given for this and related functions. Our main results complement and generalize some known results in the literature.

Painlevé integrability of a generalized fifth-order KdV equation with variable coefficients: Exact solutions and their interactions

By means of singularity structure analysis, the integrability of a generalized fifth-order KdV equation is investigated. It is proven that this equation passes the Painleve test for integrability only for three distinct cases. Moreover, the multi- soliton solutions are presented for this equation under three sets of integrable conditions. Finally, by selecting appropriate parameters, we analyze the evolution of two solitons, which is especially interesting as it may describe the overtaking and the head-on collisions of solitary waves of different shapes and different types.

A GENERALIZED GAUSS-TYPE QUADRATURE FORMULA AND ITS APPLICATIONS TO PSEUDOSPECTRAL METHOD

A generalized Gauss-type quadrature formula is introduced, which assists in selection of collocation points in pseudospectral method for differential equations with two-point derivative boundary conditions. Some results on the related Jacobi interpolation are established. A pseudospectral scheme is proposed for the Kuramoto-Sivashisky equation. A skew symmetric decomposition is used for dealing with the nonlinear convection term. The stability and convergence of the proposed scheme are proved. The error estimates are obtained. Numerical results show the efficiency of this approach.

Optimization of multibody systems based on the generalized-α projection method for DAEs

Efficient optimization strategy of multibody systems is developed in this paper. Aug- mented Lagrange method is used to transform constrained optimal problem into unconstrained form firstly. Then methods based on second order sensitivity are used to solve the unconstrained problem, where the sensitivity is solved by hybrid method. Generalized-α method and generalized-α projection method for the differential-algebraic equation, which shows more efficient properties with the lager time step, are presented to get state variables and adjoint variables during the optimization procedure. Numerical results validate the accuracy and efficiency of the methods is presented.

知识生产模式3背景下的高校通识教育超学科发展——以计算机通识教育为例

以计算机通识教育为例,结合知识生产模式更替展现高校通识教育发展历程。通过分析计算机通识教育的一般特性和发展困境,形成高校通识教育超学科发展内涵,确定计算机通识教育中的超学科命题。高校通识教育以高素质人才作为逻辑起点,围绕高素质人才发展形成逻辑主线,聚焦知识迁移、创新能力、意识形态,结合知识生产模式3核心要件,形成知识分形创新生态系统。在高校计算机通识教育创新建设行动中,强化计算机通识教育部门育人职能,提高教师、学生、课程的黏合度,并于过程中创造衍生价值。

构建产学研协同创新机制的政策演进、总体布局与实施路径研究——以安徽省为例

产学研协同创新是产学研深度融合的必要前提,也是实施创新驱动发展战略的客观要求。如何构建科学有效的产学研协同创新机制对于提升区域科技创新水平具有重要意义。从安徽省产学研协同创新政策演进出发,分析了产学研协同创新的内涵和机制构建的理论基础,围绕环境分析系统阐述了安徽构建产学研协同创新机制的目标设计和任务布局,并据此提出切实可行的实施路径。

高等职业教育与高等工程教育相互融通:依据与路径--基于工程师形象的描摹

高等职业教育与高等工程教育应相互融通以协同培养工程师。通过对10所高等职业院校和普通本科高校的人才培养方案进行分析发现,高等职业教育与高等工程教育培养的工程师在知识、技能、素质以及人才定位上皆有着内在关联,此为二者融通提供依据。为进一步推进融通进程,构建高质量工程教育体系,二者应加速统筹规划、协同创新。具言之,应建立跨学科的研究机制,拓展工程教育研究的问题框架;构建工程师分类培养体系,优化工程教育系统整体效能;创新数字化融通发展机制,打造持续适应的生态共生网络。

Non-invasive assessment of barrier integrity and function of the human gut

Over the past decades evidence has been accumulating that intestinal barrier integrity loss plays a key role in the development and perpetuation of a variety of disease states including inflammatory bowel disease and celiac disease,and is a key player in the onset of sepsis and multiple organ failure in situations of intestinal hypoperfusion,including trauma and major surgery.Insight into gut barrier integrity and function loss is important to improve our knowledge on disease etiology and pathophysiology and contributes to early detection and/or secondary prevention of disease.A variety of tests have been developed to assess intestinal epithelial cell damage,intestinal tight junction status and consequences of intestinal barrier integrity loss,i.e.increased intestinal permeability.This review discusses currently available methods for evaluating loss of human intestinal barrier integrity and function.

Effects of anesthetic methods on preserving anti-tumor T-helper polarization following hepatectomy

AIM:To investigate the impact of different anesthetic techniques on T-helper(Th) cell subsets in hepatocellular carcinoma(HCC) patients undergoing hepatectomy.METHODS:Sixty-one HCC patients who received hepatectomies were randomized into an epidural combined general anesthesia(G + E;n = 31) or a general anesthesia(G;n = 30) group.Blood samples were obtained the morning before the operation(d0),and on the second(d2) and seventh(d7) day after the operation.Th cell contents were evaluated using flow cytometry,realtime reverse transcription-polymerase chain reaction and enzyme-linked immunosorbent assay.RESULTS:In all 61 patients,Th1 and Th2 cell frequencies,and interferon-(IFN-) mRNA expression markedly increased on d2,compared to d0.They recovered slightly on d7,and the Th1/Th2 ratio increased markedly on d7,compared with d2.In contrast,Th17,regulatory T cell(Treg),and interleukin-17(IL-17) levels and FOXP3 mRNA expression showed no significant change on d2,and then markedly decreased on d7.Similarly,plasma IFN-concentration on d2 was much higher than that on d0,and then partly recovered on d7.As compared with the G group,in the G + E group,Th1 cell frequencies and the Th1/Th2 ratio were slightly higher on d2 and significantly higher on d7,while Th2,Th17,and Treg cell frequencies were slightly lower on d2,and significantly lower on d7.Consistently,on d7,IFN-mRNA and protein levels and the IFN-/IL-4 ratio in the G + E group were higher than those in the G group.In contrast,the IL-17 mRNA level,and IL-17 and transforming growth factor-1 concentrations in the G + E group were lower than those in the G group.CONCLUSION:G + E is superior to G in shifting the Th1/Th2 balance towards Th1,while decreasing Th17 and Treg,potentially benefiting HCC patients by promoting anti-tumor Th polarization.

Spatial Relation Resolution and Spatial Relation Abstraction

This paper attempts toregard spatial relation transformationas an important process in map gener-alization. The spatial relation generali-zation can be divided into the compo-nents of abstraction: topology, dis-tance and orientation. The concept‘ spatial relation resolution' is intro-duced to describe the constraints ofrelative spatial relation. On the basisof nine intersection models, the cardi-nal direction models and the iso-dis-tance-relation models, this paper givesthree sorts of relation resolution repre-sentations for topological, distance andorientation relation, respectively. Twomapping implementations in map gen-eralization is discussed.

Chaotic behaviors of the (2+1)-dimensional generalized Breor-Kaup system

With the help of the Maple symbolic computation system and the projective equation approach,a new family of variable separation solutions with arbitrary functions for the（2＋1）-dimensional generalized Breor-Kaup（GBK） system is derived.Based on the derived solitary wave solution,some chaotic behaviors of the GBK system are investigated.

Fake Reviews Tell No Tales？ Dissecting Click Farming in Content-Generated Social Networks

Recently, there has been a radial shift from traditional online social networks to content-generated social networks(CGSNs). Contemporary CGSNs, such as Dianping and Trip Advisor, are often the targets of click farming in which fake reviews are posted in order to boost or diminish the ratings of listed products and services simply through clicking. Click farming often emanates from a collection of multiple fake or compromised accounts, which we call click farmers. In this paper, we conduct a three-phase methodology to detect click farming. We begin by clustering communities based on newly-defined collusion networks. We then apply the Louvain community detection method to detecting communities. We finally perform a binary classification on detected-communities. Our results of over a year-long study show that(1) the prevalence of click farming is different across CGSNs;(2) most click farmers are lowly-rated;(3) click-farming communities have relatively tight relations between users;(4) more highly-ranked stores have a greater portion of fake reviews.

Measurement of surface shear stress vector distribution using shear-sensitive liquid crystal coatings

The global wall shear stress measurement tech- nique using shear-sensitive liquid crystal （SSLC） is extended to wind tunnel measurements. Simple and common every- day equipment is used in the measurement; in particular a tungsten-halogen light bulb provides illumination and a saturation of SSLC coating color change with time is found. Spatial wall shear stress distributions of several typical flows are obtained using this technique, including wall-jet flow, vortex flow generated by a delta wing and junction flow behind a thin cylinder, although the magnitudes are not fully calibrated. The results demonstrate that SSLC technique can be extended to wind tunnel measurements with no complicated facilities used.

Orientation and Structure of Ionic Liquid Cation at Air/[bmim][BF4] Aqueous Solution Interface

watermiscible 房间温度离子的液体 1butyl3methylimidazolium tetrafluoroborate ([bmim ][BF4 ]) 是为学习在离子的液体和水分子之间的相互作用的一个模型系统。在这个工作低集中的水的解决方案的 orientational 结构[bmim ][BF4 ] 在空气 / 液体，接口被和频率产生调查震动的光谱学。在很低的集中，丁基链展出了一个重要笨拙的缺点，这被发现了，显示混乱符合构造；并且与在表面的一个相当小的倾斜角度面向的阳离子戒指。当集中增加了时，阳离子戒指趋于在表面，和丁基链的笨拙的缺点完全躺着由于分子间的 chainchain 相互作用减少了并且作为结果更多的订的界面的分子的安排。另外，在 PPP 和 SPS 系列的反对称的拉长模式展出了山峰移动，证明那在那里多于为丁基 CH3 组的一个种取向或化学环境存在。这些结果可以在理解象 imidazolium 一样的离子的液体基于的 watermiscible 的表面行为上打开新灯表面活化剂。

Existence results for unilateral contact problem with friction of thermo-electro-elasticity

This work studies a mathematical model describing the static process of contact between a piezoelectric body and a thermally-electrically conductive foundation. The behavior of the material is modeled with a thermo-electro-elastic constitutive law. The contact is described by Signorini＇s conditions and Tresca＇s friction law including the electrical and thermal conductivity conditions. A variational formulation of the model in the form of a coupled system for displacements, electric potential, and temperature is de- rived. Existence and uniqueness of the solution are proved using the results of variational inequalities and a fixed point theorem.

THE GENERAL PROPERTIES OF THE SPHERICAL VORTICES（SV）OF n－TH ORDER AND THE CHAOTIC PHENOMENA AND OF THE ORDERED STRUCTURES OF THE SV OF 3RD ORDER

The general properties of the spherical vortices(SV)of n-th order are discussedin this paper Numerical calculations are carried out in the case of n=3.We find outsome interesting phenomena concerning the chaotic regions and ordered islands on the Poincare sections. Interpretations of these phenomena are also given.

Beneficial Effects of Delayed Opening the Infarct - related Artery on Late Phase Left Ventricular Function in Acute Anterior Myocardial Infarction

Objectives To assess the effect of delayed opening the infarct - related artery (IRA) by percutanous coronary intervention (PCI) on the late phase left ventricular function after acute ante- rior myocardial infarction. Methods 64 patients with initial Q - wave anterior myocardial infarction and the infarct - related arteries were total occluded conformed by angiogram at 2 to 14 days after onset were divided into successful PCI group and control group ( not re- ceiving PCI or the IRA not re - opened). 2 - DE was performed at early phase ( about 3 weeks) , 2 and 6 months after onset of AMI respectively to detect the left ventricular function and left ventricular wall motion ab- normality (VWMA). The total congestive heart failure events were recorded during 6 months follow-up. Re- sults VWMA scores, left ventricular ejection frac- tion (LVEF) , left ventricular end - diastolic and end - systolic volume indices ( LVEDVI and LVDSVI) were similar in 2 groups at early phase and 2 months. There were no differences between early phase and 2 months in each group too. VWMA scores and LVEF did not changed at 6 months in each group compared with the early phase and 2 months ( P > 0. 05 ). But LVEDVI and LVESVI were significantly smaller in the successful PCI group than in the control group (P < 0.01, P < 0. 05). The congestive heart failure events were taken place in 19% of patients in control group com- pared with 2% in successful PCI group ( P > 0. 05 ). Conclusions Although the infarct size does not changed, delayed opening the IRA has beneficial effect to the late phase left ventricular dilatation after acuteanterior myocardial infarction.

Improved quantum randomness amplification with finite number of untrusted devices based on a novel extractor

Quantum randomness amplification protocols have increasingly attracted attention tbr their tantastic ability to ampllI~, weak randomness to almost ideal randomness by utilizing quantum systems. Recently, a realistic noise-tolerant randomness amplification protocol using a finite number of untrusted devices was proposed. The protocol has the composable security against non-signalling eavesdroppers and could produce a single bit of randomness from weak randomness sources, which is certified by the violation of certain Bell inequalities. However, the protocol has a non-ignorable limitation on the min- entropy of independent sources. In this paper, we further develop the randomness amplification method and present a novel quantum randomness amplification protocol based on an explicit non-malleable two independent-source randomness extractor, which could remarkably reduce the above-mentioned specific limitation. Moreover, the composable security of our improved protocol is also proposed. Our results could significantly expand the application range for practical quantum randomness amplification, and provide a new insight on the practical design method for randomness extraction.

万米钻探工程的石油地质理论依据与勘探方向

油气资源是关系着我国经济发展的重要战略资源。我国陆上主力油田经过50余年开采,油田含水率已超90%。我国石油和天然气对外依存度已分别由2013年的58.9%和29.2%提高到2022年的71.2%和40.2%,已进入石油安全警戒线,影响国家安全。为了寻找更多接替储量,油气勘探向“更深、更复杂”超深层的万米勘探新领域推进,近期国内油公司相继实施了“深海一号”、“深地一号”油气勘探计划,探索实践了智能导钻新技术,推动了万米勘探计划的实施,9 000 m以深的井也发现了油气藏。通过近期的勘探实践,从超深层成烃、成储与成藏机理等方面,论证了万米钻探的石油地质理论依据,指出超深层具有多途径生烃,已经突破120~160℃的生烃门限;“三元控储”理论指出,大于4 500 m的深层、超深层仍发育有效的储集体;多期成藏与保持是超深层规模油气藏发育的有利条件。四川盆地海相深层资源总量约为15.22×10^(12) m~3,其绵长裂陷槽周缘震旦系、川中古隆起周缘龙王庙组、城口海槽南侧米仓山—大巴山地区龙王庙组、川西上古生界深层等具有千亿立方米的资源规模。塔里木海相深层总资源量约为152.62×10~8 t油当量,其中塔北隆起、塔中隆起、麦盖提斜坡的中下奥陶统岩溶以及满加尔西缘中下寒武统台缘带、阿瓦提—顺托果勒中下寒武统台内滩等是具有亿吨级规模的勘探领域。鄂尔多斯盆地西南缘的中新元古界近期也有重要的油气发现。准噶尔盆地准中深洼带、塔里木盆地库车坳陷深层等碎屑岩领域也是万米勘探的重要领域。