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新时期中国工程教育体系及其构建 总被引：1，自引：0，他引：1
我国经济社会已进入新的发展时期,产业升级与转型、科技创新和对公平和谐理念的追求,推动、引导着我国工程教育体系积极调整、构建与经济社会相适应的纵向多样化、横向合理化的结构体系。而工程科学与工程实践、创新与工程教育、专业设置与产学合作三大关系是构建新时期工程教育体系的关键所在;理念先导,依托专业设置机制、完善专业认证机制则是构建新时期工程教育体系的路径选择。 相似文献
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To study the collapse of imperfect subsea pipelinos, a 2D high-order nonlinear model is developed. In this model, the large deformation of the pipes is considered by raiaining the high-order nonlinear terms of strain. In addi-tion, the J2 plastic flow theory is adopted to describe the elasioplastic constitutive relations of material. The quasi-static process of collapse is analyzed by the increment method. For each load step, the equations based on the principle of virtual work are presented and solved by the discrete Newton＇s method. Furthermore, finite element simulations and full-scale experiments were preformed to validate the results of the model. Research on the major influencing factors of collapse pressure, including D/t, material type and initial ovality, is also presented. 相似文献
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中国企业技术联盟中创新网络与创新绩效的关系分析——来自江浙沪闽企业的实证研究 总被引：2，自引：0，他引：2
在开放式创新战略中,企业创新网络通过间接关系合作起到信息通道的作用。根据企业在创新网络中的中心位置和技术联盟合作情况,分析企业创新能力的水平和信息的可获性是否对其创新绩效产生影响。通过对江浙沪闽四地105家创新企业的数据进行实证研究,结果显示企业在创新网络中心位置信息可获性与其创新能力成正相关关系;同时企业的技术联盟和组织因素有利于获取外部创新源,并最终影响企业的创新绩效。 相似文献
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A simplified bi-variable human error probability calculation method is developed by incorporating two common performance condition （ CPC ） factors, which are modified from factors employed in cognitive reliability and error analysis method （CREAM） to take into account the characteristics of shipping operations. After the influencing factors are identified, Markov method is used to calculate the values of human reliability. The proposed method does not rely on the involvement of experts in the field of human factor nor depend on historical accidents or human error statistics. It is applied to the case of the crew on board of an ocean going dry bulk carrier. The caculated results agree with the actual case, which verifies the validity of the model. 相似文献
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高等工程教育改革的理念与实践——以麻省、伯克利、普渡、天大为例 总被引：4，自引：0，他引：4
本文通过对国外三所一流大学工程教育改革理念、模式及其内涵的分析发现,哲学理念和教育学理论在北美一流大学工程教育改革中具有积极的支撑作用.在此基础上,结合天津大学"求是"学部的工作,提出相关的思考和建议. 相似文献
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Nonlinear vibration can cause serious problems in long span cable-stayed bridges.When the internal resonance threshold is reached between the excitation frequency and natural frequency,large amplitudes occur in the cable.Based on the current situation of lacking corresponding constraint criteria,a model was presented for analyzing the dynamic reliability of coupling oscillation between the cable and tower in a cable-stayed bridge.First of all,in the case of cable sag,the d'Alembert principle is applied to studying the nonlinear dynamic behavior of the structure,and resonance failure interval of parametric oscillation is calculated accordingly.Then the dynamic reliability model is set up using the JC method.An application of this model has been developed for the preliminary design of one cable-stayed bridge located on Hai River in Tianjin,and time histories analysis as well as reliability indexes have been obtained.When frequency ratio between the cable and tower is approaching 1∶2,the reliability index is 0.98,indicating high failure probability.And this is consistent with theoretical derivation and experimental results in reference.This model,which is capable of computing the reliability index of resonance failure,provides theoretical basis for the establishment of corresponding rule. 相似文献