跨学科视野下对Point of View的重新界定

在西方叙事作品研究界，“point of view”自20世纪初以来一直是一个核心概念和热门话题。叙事学和文体学都十分关注这一话题。表面上看，两个学派对“point of view”进行了大致相同的探讨，而实际上两者在理念和路径上各行其道且相互排斥。叙事学界在探讨“point of view”时，将其囿于观察者的感知(区分“谁说”和“谁感知”),这种自我限制不合情理。与此相对照，文体学在探讨“point of view”时，聚焦于叙述者(说话者)的立场态度，这种自我限制也造成了很大问题。这两个学派在探讨“point of view”时各自的片面性以及相互之间的排他性还导致了不少理论上的混乱。这也对国内的研究造成了影响。本文在指出以往问题的基础上，对“point of view”提出切合实际的新的界定，旨在通过这一新的界定帮助推进理论探讨的发展并促进跨学科研究，以便对叙事作品进行更好、更为全面的分析。     

超声波CT成像技术及其在大型桥梁 基桩无损检测中的应用

在大型桥梁基桩的超声波检测中，为了准确确定异常部位的尺寸，将CT成像技术引入到超声波检测中，实际工程应用结果表明，这种技术具有分辨率高、缺陷定位准确、检测结果直观、图象清晰等特点.，The ultrasonic tomography technology was employed in undamage test of large bridge foundation piles in order to measure damage of concrete in this paper. The measuring result of an engineering example indicated that the ultrasonic tomography technology is a good method in the quality evaluation of bridge foundation piles.，     

Modified Weighting for Calculating the Average Concentration of Non-Point Source Pollutant

The concentration of runoff depends upon that of soil loss and the latter is assumed to be linear to the value of EI that equals the product of total storm energy E times the maximum 30-min intensity，I^30 for a given rainstorm．Usually，the maximum accumulative amount of rain for a rainstorm might bring on the maximum amount of runoff，but it does not equal the maximum erosion and not always lead the maximum concentration．Thus，the average concentration weighted by amount of runoff is somewhat unreasonable．An improvement for the calculation method of non-point source pollution load put forward by professor Li Huaien is proposed．In replacement of the weight of runoff，E1 value of a single rainstorm is introduced as a new weight．An example of Fujing Rive rwatershed shows that its application is effective．     

Design，Calculation and Model Test of Zhongshan Bridge

Zhongshan Bridge is a kind of steel arch bridge with a particular space-combined structure．The rationality of design．accuracy of theoretical calculation and reliability of transportation were studied．Its design，FEM calculation of stresses and strains，and model test were introduced in detail．The theoretical analysis and model test verified that the design was reliable and safe．The simulated stresses，rigidity and stability，which are based on the selected loading system and cross-section geometry，satisfy the related design standards．Some of the issues that need to be considered in the real bridge construction were also discussed．     

Network Decomposition and Maximum Independent Set Part Ⅱ：Application Research

According to the researches on theoretic basis in part I of the paper，the spanning tree algorithms solving the maximum independent set both in even network and in odd network have been developed in this part，part Ⅱ of the paper．The algorithms trans form first the general network into the pair sets network，and then decompose the pair sets network into a series of pair subsets by use of the characteristic of maximum flow passing through the pair sets network．As for the even network，the algorithm requires only one time of trans formation and decomposition，the maximum independent set can be gained without any iteration processes，and the time complexity of the algorithm is within the bound of O(｜V｜^3)．However，as for the odd network，the algorithm consists of two stages．In the first stage，the general odd network is transformed and decomposed into the pseudo-negative envelope graphs and generalized reverse pseudo-negative envelope graphs alternately distributed at first；then the algorithm turns to the second stage，searching for the negative envelope graphs within the pseudo-negative envelope graphs only．Each time as a negative envelope graphhas been found．renew the pair sets network by iteration at once．and then tum back to the first stage．So both stages form a circulation process up to the optimum．Two available methods，the adjusting search and the picking-off search are specially developed to deal with the problems resulted from the odd network．Both of them link up with each other harmoniously and are embedded together in the algorithm．Analysis and study indicate that the time complexity of this algorithm is within the bound of O(｜V｜^5)．     

Interval Analysis of the Finite Element Method for Stochastic Structures

A random parameter can be transformed into an interval number in the structural analysis with the concept of the confidence interval．Hence，analyses of uncertain structural systems Can be used in the traditional FEM software．In some cases，the amount of solutions in stochastic structures is nearly as many as that in the traditional structural problems．In addition，a new method to evaluate the failure probability of structures is presented for the needs of the modern engineering design．     

A New Proposal of Inverse-Time Characteristics for Overcurrent Relay Based on Microcomputer

The conventional time function of electromechanical relays is hard to coordinate with other relays．In order to promote the application of inverse-time overcurrent relays，a new time function for microprocessor-type relay is proposed．The setting of the trip time for this relay is performed by determining the shortest trip time and the longest trip time，respectively．The results of analysis show that with the new time function，the inverse-time overcurrent relay is easy to coordinate with other relays and has a comparatively shorter trip time，and that the fault happens in the protective zone．     

Research on the Variable Steering Ratioof Four-Wheel-Steering Vehicle

The steering characteristic of afour-wheel-steering vehicle is numerically simulated for in-depth research of the handling stability offour-wheel steering．The research results show that the deteriorating tendency of the steering stability due to the increase of the vehicle speed is improved obviously in the case of four-wheel steering．The approach of variable steering ratio is discussed.The use of the variable steering ratio can not only raise the steering stability of vechicles at high vehicle speed，but also reduce the dicomfort and steering burden of drivers；and hence is helpful for the subjective evaluation of four-wheel steering vehicles．     

F-Decomposition of Noetherian Modules over Hyper-（Cyclic or Finite）Groups

Let F be a locally defined formation consisting of locally soluble groups，G a hyper-(cyclic or finite)locally soluble group and A a noetherian ZG-module with all irreducible ZG-factors being finite，G∈F,f(∞)≌f(p)，f(P)≠Фfor each P∈π．The following conclutions are obtained：(1)if there exists a maximal submodule B of A such that A／B is F central in G and B has no nonzero F centml ZG-factors，then A has an F decomposition；(2)if there exists an irreducible F central submodule B of A such that all ZG-composition factors of A／B are F ecentric，then A has an F decomposition．     

Combining Single（Mixed） Metric Approach and Genetic Algorithm for QoS Routing Problem

A hybrid algorithm for the delay constrained least cost path problem is proposed through combination of single(mixed)metric approach and genetic algorithm．Compared with the known genetic algorithm for the same problem，the new algorithm adopts integral coding scheme and new genetic operator，which reduces the search space and improves the efficiency of genetic operation．Meanwhile，the single(mixed)approach accelerates the convergence speed．Simulation results indicate that the proposed algorithm can find near-optimal even optimal solutions within moderate numbers of generations．     

关于做好2010年农村公路工作的若干意见

交通运输部公路局交公路发[2010]119号文发布The No[2010]119Document from Road Department of the Ministry of Transport各省、自治区、直辖市、新疆生产建设兵团交通运输厅（局、委）,天津市市政公路管理局： 为贯彻落实2010年中央1号文件、全国交通运输工作会议和全国农村公路工作电视电话会议精神,全面完成“十一五”农村公路建设任务，落实农村公路管理养护责任，推进城乡客运交通一体化，现就做好2010年农村公路工作提出以下意见：     

Relations Among Some Fuzzy Entropy Formulae

Fuzzy entropy has been widely used to analyze and design fuzzy systems，and many fuzzy entropy formulae have been proposed.For further in-deepth analysis of fuzzy entropy，the axioms and some important formulae of fuzzy entropy are intoduced.Some equivalence results among these fuzzy entropy formulae are proved，and it is shown that fuzzy entropy is aspedal distance measurement．     

Minimal Enclosing of an MPT （v,λ） in a TS （v＋l,μ）

Let MPT (v,λ) denote a maximum packing of triples of order v with index λ and TS (u,λ) denote atriple system of order u with index λ. In this paper, for v≥6, we determine necessary and sufficient conditions forenclosing an MPT (v，λ) in a TS (v l ,λ m) with one extra point and minimal increase in λ.     

Strategy-Based Forecasting Model for Civil Airlines

Airlines usually pay more attention tO maintenance cost for efficiency improvement and consumption reduction．However，airlines，especially the domestic airlines，Can hardly predict the cost exactly due to the uncertainty and complexity until now．In practice，the cost is calculated by collecting and calculating the invoices afterwards．To settle the problem，a maintenance cost forecasting model is proposed in this paper．Maintenance activities are classified into scheduled maintenance and unscheduled maintenance．Scheduled maintenance is periodic，in which the required materials and man-power hours can be obtained properly in advance．Nevertheless，it is impossible to acquire the necessary in formation of unscheduled maintenance．According to the specific characteristics of each，Activity-Based Costing(ABC)and Cost Estimating Relationships(CERs)are introduced to attack the building of forecasting models，respectively．Then practical cases，the 3C check of MD-90 and the engine shop visit are adopted tO verify the cost forecasting models proposed．The results show that the models not only can predict the actual maintenance cost successfully，but also are helpful tO drawing up the maintenance program and managing the maintenance funds efficiently．     

《西安交通大学学报（英文版）》征稿简则

《西安交通大学学报（英文版）》（Academic Journal of Xi’an Jiaotong University，Acad JXJTU）是经国家科技部和新闻出版总署批准的综合类学术期刊。其办刊宗旨是及时报道学校在理、工、医及其他相关学科的最新科研成果，反映学校的科技动态，展示学校的科研实力。现开设有研究原著、技术方法、研究简报、专家述评、科研动态等栏目。Acad J XJTU为季刊，国内外公开发行。     

基于CiteSpace的元宇宙研究态势可视化分析

运用CiteSpace可视化知识图谱分析方法，对Web of Science数据库收录的2000—2023年关于元宇宙研究的文献，从时间分布、空间分布、研究热点以及前沿趋势等方面进行系统的可视化计量分析.分析结果显示，当前，国内外元宇宙研究领域处于理论探讨和实践探索的繁荣发展时期，前沿热点聚集于虚拟现实、数字孪生、区块链等领域，在技术布局、标准法规制定等方面仍有待向纵深化发展.     

Effect of Fluid-Structure Interaction on Sealed Flow Field and Leakage Rate Based on Computational Fluid Dynamics

This paper addresses the issue of reciprocating compressors staggered labyrinth seal structure. The internal flow field of sealed structure, the displacement of cylinder and piston for different tooth profile angles are analyzed synchronously using FLUENT software, and the effects of fluid-structure interaction on the performance of the labyrinth seal are revealed. The results indicate that with the growth of tooth profile angle, the leakage rate of labyrinth seal tends to decrease first, and then increase. The results of fluid-structure interaction analysis are close to those of actual engineering. The effect of fluid-structure interaction makes tiny deformation in calculation mesh of piston and cylinder structure, and the coupling interaction affects the performance of the labyrinth seal.     

Orders of Automorphism Groups of Some p-Groups

The orders of automorphism groups of the groups of order p6 in the twelve family φ12 are produced, where p is an odd prime. Every group is analysed by utilizing the properties of metabelian, regularity and p-commutativity of finite p-groups, and the structure of the generators of its automorphism groups is obtained. Then the orders of automorphism groups are determined through some properties of equivalence in number theory.     

Analysis and calculation of axial stiffness of tubular X-joints under compression on braces

This paper introduces the influence factors of axial stiffness of tubular X-joints. The analysis model of tubular joints using plate and shell finite element method is also made. Systematic single-parameter analysis of tubular X-joints is performed using Ansys program. The influences of those factors, including ratio of brace diameter to chord diameter (β), ratio of chord diameter to twice chord thickness (γ), ratio of brace wall thickness to that of chord (τ), brace-to-chord intersection angle (θ), and chord stress ratio, ratio of another brace diameter to chord diameter, in-plane and out-of-plane moment of braces, etc., on stiffness of tubular X-joints are analyzed.Two non-dimensional parameters-joint axial stiffness factor ηN and axial force capacity factor ωN are proposed,and the relationship curve of the two factors is determined. Computational formulas of tubular X-joint axial stiffness are obtained by multi-element regression technology. The formulas can be used in design and analysis of steel tubular structures.     

Improving the stab-resistance performance of ultra high molecular weight polyethylene fabric intercalated with nano-silica-fluid

High performance fibers impregnated by shear thickening fluids （STFs） have been recognized as a kind of latent stab-resistant materials. In our work, the rheological properties of various nano-silica particles in different carriers were first investigated, some of which showed the typical characteristic of shear thickening phenomena. And then, the effects of add-on and surface hydrophilicity of silica particles, the type and concentration of the carriers were discussed in detail. It was found that the systems of hydrophilic silica in ethylene glycol, butylenes glycol and polyethylene glycol （PEG） demonstrated shear thickening; moreover, the reversibility of rheological behaviors of hydrophilic silica-PEG300 suspensions indicated energy dissipation existed within a circulation of shear stress. Furthermore, the detail mechanism of STF based nano-silica particles was explored and a process diagram was presented. Finally, the stab-resistance and morphology of cutting edge of ultra high molecular weight polyethylene （UHMWPE） fabric impregnated STF composites were investigated and the results were analyzed. The higher silica add-on was benefit to the improvement of the stab resistance of the composites.