“3.5层塔构”实验教学示范中心运行模式的探索与实践

在总结"十二五"实验平台建设成效基础上,突出优势学科专业特色,形成优质资源融合、教学科研协同、校企联合培养人才的实践教学体系。提出示范中心要以培养学生工程实践创新能力为根本目标,进一步明确发展思路,创建了以基础层、专业基础层、专业层为主体,分层支撑顶端综合层的"3.5层塔构"实验教学示范中心运行模式,突出"多层次、立体式、重内涵、开放性、强联合"等要素,发挥了示范中心在学校人才培养环节中的重要作用。

格式塔同构理论观照下汉语古诗英译的情感解读与再现

传译诗人的情志是诗歌翻译中译者关注的重点,按照格式塔同构理论,译者在翻译汉语古诗时,应解读原诗音韵、节奏和意象所蕴涵的情感,通过发挥译入语优势将此情感移植到译文中去,以期唤起译入语读者与原语读者相同程度的情感体验。

铁路矮塔斜拉T构桥结构设计方法实例研究

本文以渝(重庆)黔(黔江)铁路长途河大桥为工程背景,综合考虑桥址地形地质、桥梁跨度、净空及受力特点等要素,提出了主桥采用(132+132) m的矮塔斜拉T构桥型的总体设计方案,并采用数值模拟方法分析了拉索布置范围、索间距对梁部内力、刚度的影响规律。结果表明:(1)斜拉索靠近主塔布置、适当加密索间距有利于减小梁部负弯矩峰值,对梁体受力更为有利;(2)综合考虑拉索对结构受力和梁体刚度的影响,依托工程无索区梁端及塔根无索区分别取为30 m和38 m、索间距按8 m设置。最后,通过开展斜拉索对矮塔斜拉T构桥结构受力影响的分析,探讨了矮塔斜拉T构桥型的适用性。

钢管混凝土风力发电机格构式塔架抗震性能的试验研究

以目前常用的1.5MW风力发电机组锥筒型塔架为参考对象,设计了三肢柱和四肢柱钢管混凝土风力发电机格构式塔架模型。通过对塔架模型进行拟静力试验,对比研究了三肢柱和四肢柱钢管混凝土风力发电机格构式塔架的滞回性能、耗能能力等抗震性能。研究结果表明:三肢柱和四肢柱钢管混凝土风力发电机格构式塔架均具有良好的抗震性能和耗能能力。

铁路高墩大跨T构矮塔斜拉桥设计研究

根据桥址处地形、地貌、地质情况确定瓮安河大桥主桥采用(155+155) m高墩大跨T构矮塔斜拉桥。梁底以下墩高达130 m,为同类桥梁之最。采用MIDAS/Civil对主桥结构进行计算分析,计算结果表明:该桥强度、刚度及稳定性均满足规范要求,具有良好的静力、动力特性。该桥型结构优美,工程经济,施工简单,可为今后复杂山区铁路桥梁设计提供借鉴。

海上风电机组预应力钢管混凝土格构式塔架动力特性分析

为避免风电结构发生共振,影响发电效率和结构安全,了解掌握风电机组支撑结构动力特性至关重要。预应力钢管混凝土格构式塔架是一种新型的风电机组支撑结构,在海上风电机组大型化过程中将扮演重要角色,本文采用有限元建模的方式对该塔架固有频率进行分析,分析在不同底部跟开、不同角柱直径和壁厚、不同斜杆壁厚下的固有频率的变化特征,并提出设计建议,以期对设计人员提供思路。

有限分析钢管和格式塔架的地震响应

目的:旨在研究为工程应用设计提供参考的钢管砼格构式塔架的模态分析及地震响应分析。方法:应用有限元软件ABAQUS,通过对材料非线性和几何非线性的合理考虑,利用ABAQUS建立塔架有限元模型,选择地震波,包括钢管与核心混凝土相互作用的影响,地震响应分析,易损性分析等,探究相关参数对地震响应的影响。模型塔架通过ABAQUS非线性有限元软件进行有限元分析,得到塔架各杆件受力分布规律和节点区,从而得到最大荷载时塔架系统截面最薄弱的位置。

Structural Analysis and Anticoagulant Activity of Polysaccharides from Opuntia milpa alta

[Objective] To analyze the components and structure of Opuntia milpa alta polysaccharides, and to study its anticoagulant activity. [Method] The crude polysaccharides （CP） were prepared from Opuntia milpa alta using hot water extraction and ethanol precipitation method, purified by anion-exchange chromatography and gel filtration chromatography to study its monosaccharide composition, weight-average molecular weight distribution and main chain structure. And a preliminary study was conducted on the anticoagulant activity of polysaccharide components. [Result] The polysaccharide components WSP1, WSP2a and WSP3 were obtained from CP by the anion-exchange chromatography and gel filtration chromatography. WSP1 was mainly composed of galactose with a weight-average molecular weight of 2.32×106. WSP2a consisted of rhamnose, arabinose, xylose, mannose, glucose, galactose, glucuronic acid and galacturonic acid, the contents were 6.3%, 32.3%, 12.9%, 1.5%, 4.8%, 37.1%, 0.64% and 4.4%, respectively. WSP3 mainly composed of arabinose, xylose, rhamnose and trace of glucose, mannose, uronic acid. The weight-average molecular weight of WSP2a and WSP3 was 1.24×106 and 7.92×106, respectively. WSP2 prolonged the activated partial thromboplatin time （APTT） and thrombin time （TT）, while had no significant effect on the prothrombin time （PT） in vitro, indicating that anticoagulant activity of WSP2 functions by affecting the intrinsic coagulation system. The test of inhibition to the conversion of fibrinogen into thrombin showed that WSP2a and WSP3 had obvious anticoagulant activity. Methylation analysis indicated that the main chain of WSP2a was constituted of 1, 4-GalA, 1, 2-Rha and 1, 2, 4-Rha. [Conclusion] This study provided experimental basis for the optimization and development of polysaccharide resources from cactus

四川通江诺江镇千佛岩摩崖造像调查简报

四川省通江县千佛岩摩崖造像现存63龛,是一处纯佛教造像点。造像规模较大,题材丰富,其中以释迦说法、阿弥陀佛与五十二菩萨、千佛、密檐式塔等最为突出,且初、盛唐纪年题记较多。结合题记和造像题材推断,千佛岩摩崖造像始凿于唐高宗龙朔年间,终于唐玄宗开元年间。第38龛所造仿木构密檐式塔,保存较好且年代基本明确,是研究唐代建筑和佛塔极为重要的材料。

Ant colony ATTA clustering algorithm of rock mass structural plane in groups

Based on structural surface normal vector spherical distance and the pole stereographic projection Euclidean distance,two distance functions were established.The cluster analysis of structure surface was conducted by the use of ATTA clustering methods based on ant colony piles,and Silhouette index was introduced to evaluate the clustering effect.The clustering analysis of the measured data of Sanshandao Gold Mine shows that ant colony ATTA-based clustering method does better than K-mean clustering analysis.Meanwhile,clustering results of ATTA method based on pole Euclidean distance and ATTA method based on normal vector spherical distance have a great consistence.The clustering results are most close to the pole isopycnic graph.It can efficiently realize grouping of structural plane and determination of the dominant structural surface direction.It is made up for the defects of subjectivity and inaccuracy in icon measurement approach and has great engineering value.

Infrared Absorption and [CuO_5] Pyramid of High T_c Superconductor Bi-Sb-Sr-Ca-Cu-O System

The infrared absorption spectra of different superconducting phase of high Tc super conductor Bi-Sb-Sr-Ca-Cu-O have been measured . The results show that only in the range of 400cm-1 -700cm-1,there is a group of peaks which changes with different superconducting phases.According to group theory and infrared spectra of CuO, this group of peaks could be assigned to be the [CuO6]octahedron, the [CuO5] pyramid and the [CuO4]plane quadrilateral,but not CU-O plane or CU-O chain. Furthermore, the quasi-three dimensional Cu-O layers consisting of [CuO5] pyramids and proper coupling between them are essential factor for high Tc. It seems that the weaker compling of layers, the higher Tc

Connecting parameters optimization on unsymmetrical twin-tower structure linked by sky-bridge

Based on a simplified 3-DOF model of twin-tower structure linked by a sky-bridge,the frequency response functions,the displacement power spectral density(PSD)functions,and the time-averaged total vibration energy were derived,by assuming the white noise as the earthquake excitation.The effects of connecting parameters,such as linking stiffness ratio and linking damping ratio,on the structural vibration responses were then studied,and the optimal connecting parameters were obtained to minimize the vibration energy of either the independent monomer tower or the integral structure.The influences of sky-bridge elevation position on the optimal connecting parameters were also discussed.Finally,the distribution characteristics of the top displacement PSD and the structural responses,excited by El Centro,Taft and artificial waves,were compared in both frequency and time domain.It is found that the connecting parameters at either end of connection interactively affect the responses of the towers.The optimal connecting parameters can greatly improve the damping connections on their seismic reduction effectiveness,but are unable to reduce the seismic responses of the towers to the best extent simultaneously.It is also indicated that the optimal connecting parameters derived from the simplified 3-DOF model are applicable for two multi-story structures linked by a sky-bridge with dampers.The seismic reduction effectiveness obtained varies from 0.3 to 1.0 with different sky-bridge mass ratio.The displacement responses of the example structures are reduced by approximately 22% with sky-bridge connections.

Pyramidal Structure of Chinese Publicly-Listed Private Firms:Motivations, Correlations and Paths to Governance

It is generally believed in academia that there are two theoretical explanations of tunneling and financing advantage for the creation of pyramidal structure. However, there is no definitive conclusion on which explanation holds sway. Based on non-equilibrium panel data of seven years between 2004 and 2010, this empirical study uses the product market competition variables of ＂inter-sector competition＂ and ＂intra-sector competition＂ and the hierarchy and complexity of pyramidal structure, examines the correlation between pyramidal structure of Chinese private manufacturing listed firms and product market competition and patterns of change, and reveals the major causes of pyramidal structure. Empirical result indicates that, for Chinese private manufacturing listed companies, there is a significant negative correlation between product market competition and the hierarchy and complexity of pyramidal structure, which indicates that the creation of pyramidal structure has a preference on tunneling by controlling shareholders. On the basis of further considerations on corporate tunneling and financing restraint categorization, high-tunneling firms and firms with low financing restraint demonstrate significant tunneling motivations; low-tunneling firms and firms with high financing restraint demonstrate significant effect of financing advantage, which further testifies both theoretical explanations for the creation of pyramidal structure. Conclusions of these studies have not only enriched and supplemented relevant studies on the root causes for the creation of pyramidal structure by Chinese private business groups, but provide practical support for firms to make correct and effective use of pyramidal structure as well.

Design and construction of Sutong Bridge tower

Sutong Bridge tower which is 300.4 m is the highest one in the world.The tower anchor area uses the steel-concrete composite structure,its structure and the stress mechanism are complex,so it must be paid more attention to the structure durable issue.The 300 m height makes the tower quite sensitive to the environmental factors such as wind and temperature.The wind resistance safety of tower in construction stage is especially important.In this paper,the design of composite structure is introduced.The key technologies of tower geometry control and wind resistance in construction stage are analyzed.

Comparison of Two Types of Control Structures for Benzene Chlorine Reactive Distillation Systems

The ＂neat＂ operation of the two-reactant reactive distillation column has Oetter steady-state economics, while It presents a challenge for design, optimization, and control of the process. Based on the optimal economic design, the dual-composition control structure and dual-temperature control structure are designed respectively for the benzene chlorine consecutive reactive distillation process. The effectiveness and robustness are analyzed comparably for the disturbance resistance in terms of changes of production rate and feed composition. Results show that dual-temperature control with propose selection of tray temperatures and the optimal profile of the set point can provide better transient process performance than the composition control structure.

CFD Analysis of Gas Distributor in Packed Column ——Prediction of Gas Flow and Effect of Tower Internals Geometry Structure

Computational fluid dynamics (CFD) simulations were carried out on the gas flow patterns of twin-tangential annular deflector gas distributor in the absence of liquid flow in a packed column (6.4 m in diameter), and the gas flow field in the column was presented close to reality on the whole. Furthermore, after ame-(lioration) of this gas distributor frame, turbulence energy and turbulence energy dissipation rate were both decreased greatly.Simulation results showed that the flow pattern and the distribution of gas flow were strongly affected by the column bottom frame; the proper column bottom frame could decrease the flow pressure drop greatly. Multifold factors, such as the column bottom geometry structure and distributor structure which affects the distribution capacity, must be considered.

Reasons Why the Great Pyramids of Giza Remain the Only Surviving Wonder of the Ancient World： Drawing Ideas from the Structure of the Giza Pyramids to Nuclear Power Plants

Selecting a site for a nuclear power plant requires extensive studies to ensure its safety and stability during its operation until its decommissioning. The 4,500-year old Egyptian pyramids at Giza are buildings to learn from. This paper tries to pin down the reasons for the survival of the Giza pyramids in order to reach a criterion for choosing sites for important buildings. It argues that the site selection and the geological properties of the area, being away from seismic effects,, floods and groundwater levels, the stability of the geometric form of the pyramid, the solidity of the structural engineering and precision of execution arguably are the reasons why the Great Pyramids of Giza are the only survivors of the seven wonders of the ancient world.

The Neo-Zapatista Movement of Chiapas： Identities and Strategies

One of the collective phenomena that has allowed a theoretical debate on the social movements in the current context is the neo-Zapatista of Chiapas. From a discussion on some significant events and possible interpretations about their identities, strategies, demands and speeches, the aim is to place the movement in a structural dynamics that will acquire different views. In apparent confirmation of an ＂identitarian community of resistance＂, the neo-Zapatismo seems to move toward a new scenario, in which ＂your chance＂ is configured from its structural flexibility and fluidity. In this way, the neo-Zapatista movement seems to confirm that the theoretical antinomies on the social movements relating to the American school, its emphasis on ＂strategy＂ of collective actions, and the ones referring to the European version, emphasizing the dimension of ＂identity＂, cannot be considered completely contradictory. The neo-Zapatismo has shown that a particular strategy developed a specific corresponding identitarian construction, and vice versa.

Assessment of Stone Material Deterioration of the Exposed Surfaces of the Step Pyramid in Saqqara

The Step Pyramid of Djoser at Saqqara, Egypt is one of the oldest stone monuments in the world and along with other historical monuments of this area is included in the World Heritage List of UNESCO （United Nations Educational, Scientific, and Cultural Organization）. In a way, this monument was an experimental construction and served as a prototype for other pyramids afterwards built in Ancient Egypt. Innovative materials, mortar, construction and engineering solutions were introduced and approbated during the construction process of the Step Pyramid. Therefore, the reconstruction of this monument possibly close to its original state is an extremely difficult task. The preservation of this pyramid for future generations is a challenge to the specialists of various scientific fields. Current study is focusing on systematic assessment of the exposed surfaces of the pyramid＇s facades identifying various stone material weathering types and their intensities, as well as major deformations of the structure further integrated into the geospatial model of the pyramid. The results of this study provide possibility to determine the most endangered areas of pyramid＇s facades and calculate the volume of necessary reconstruction work.

A Comparative Architectural Study of the Structural Form between Two Religious Buildings in Brasilia： The Cathedral and the Tibetan Stupa

Brasilia, born of the urban plan by Lficio Costa and of the unexpected concrete structural forms designed by Oscar Niemeyer, knew how to adapt to the new forms that came from the country＇s religious syncretism. This article aims to compare, through religious symbolism, structural forms and architectural spaces, two sacred monuments： The cathedral of Brasilia （1958-1967） and the stupa of the Tibetan Buddhist Center, inaugurated in 2006. The millenary construction form of the stupa, one of the primordial sacred structures for all Buddhism traditions, the sacred symbol of enlightenment, must obey some construction rules according to its lineage＇s Buddhist tradition. In this way, the stupa is the opposite of a strong and fearless structural form embodied in the cathedral, with its 16 revolution hyperboloid concrete pillars and its subterranean entrance. Although built in concrete both are unusual forms of architecture with distinct spatial conception and sculptural form structures. While respecting religious differences, it is noticeable a real commitment between form and structure, volume and religious symbolism. At the conclusion, it is perceivable how distinct forms--the Cathedral and the Stupa--can respond in analog manners to the necessity of a gathering space where visitors go in search of expressing their faith. Along with them, Buddhism and Catholicism are rooted in Brazil＇s new capital.