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史以载道 学以致用:天津史研究与天津学筹创 被引量:1
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作者 任吉东 《理论与现代化》 CSSCI 2013年第3期61-63,共3页
史以载道,学以致用。天津史研究已经从科研队伍、学科资料、学术成果等方面为"天津学"研究的开展奠定了良好的基础,而作为历史悠久、发展脉络清晰和知名城市的天津也具备了建立"天津学"的条件,适时地开展"天津... 史以载道,学以致用。天津史研究已经从科研队伍、学科资料、学术成果等方面为"天津学"研究的开展奠定了良好的基础,而作为历史悠久、发展脉络清晰和知名城市的天津也具备了建立"天津学"的条件,适时地开展"天津学"的研究,既是对历史的总结和提炼,也是对未来的指引和蕴势,两者的结合能够更好地起到鉴史资治、明史辅政的功用。 展开更多
关键词 天津 天津学 鉴史资治
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师生共同发展是学校发展的根本——天津市第三中学王泽宽校长访谈录
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作者 兆丰年 王泽宽 《天津教育》 北大核心 2005年第12期11-13,共3页
关键词 天津市第三中 王泽宽 校长 人物访谈 校管理 理念
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为“留住乡愁”筑牢文化根基——第一届地方文献与地方文化学术研讨会综述
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作者 白丽萍 王振良 《古籍保护研究》 2024年第2期4-11,共8页
2023年5月13日,天津师范大学地方文献研究中心举办第一届地方文献与地方文化学术研讨会。会议主要聚焦在三大主题——地方文献理论方法的研究、地方文献编纂实践的研究以及具体地方文献和地方人物的研究。本次会议的研讨有以下三个突出... 2023年5月13日,天津师范大学地方文献研究中心举办第一届地方文献与地方文化学术研讨会。会议主要聚焦在三大主题——地方文献理论方法的研究、地方文献编纂实践的研究以及具体地方文献和地方人物的研究。本次会议的研讨有以下三个突出特点:一是提出采集整理当代口述文献,非常具有开拓精神;二是致力文献的开发利用,强调服务理念;三是强化学术引领,提出整理与研究并重观点。 展开更多
关键词 地方文献 地方文化 口述文献 天津学 地方
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近代天津女学的倡建与经费筹支(1902—1927年)
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作者 陈政祥 《保定学院学报》 2013年第4期86-90,共5页
清末民初,天津女学的倡建得力于各要素汇集,或开埠通商后的社会风气影响,或开明士绅的鼎力支持,或政府要员的加盟,或其他社会人士的襄助。经费是女学发展的重要保证,在诸多的经费来源中,有学费收入、士绅助款、政府拨款、社会捐资等诸... 清末民初,天津女学的倡建得力于各要素汇集,或开埠通商后的社会风气影响,或开明士绅的鼎力支持,或政府要员的加盟,或其他社会人士的襄助。经费是女学发展的重要保证,在诸多的经费来源中,有学费收入、士绅助款、政府拨款、社会捐资等诸多形式,呈现出多元化态势。经费的支出也是纷繁复杂。经费的充裕与否,对于女学的运转起到了至关重要的作用。 展开更多
关键词 近代 天津 经费筹措 经费支出 教育史
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在继承中发展 在实践中创新——天津市工学结合职业教育模式研究探索 被引量:2
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作者 龙德毅 《中等职业教育》 2008年第2期3-7,共5页
本文从实践与理论结合的角度对天津工学结合职业教育模式进行了研究探索,总结天津工学结合职业教育模式的历史演变,综述天津工学结合职业教育模式的实践创新,阐明天津工学结合职业教育模式的理论依据,并概括了天津工学结合职业教育模式... 本文从实践与理论结合的角度对天津工学结合职业教育模式进行了研究探索,总结天津工学结合职业教育模式的历史演变,综述天津工学结合职业教育模式的实践创新,阐明天津工学结合职业教育模式的理论依据,并概括了天津工学结合职业教育模式的发展前瞻,以期在坚持科学发展观中不断深化人才培养天津工学结合职业教育模式的改革。 展开更多
关键词 天津结合职业教育模式 历史演变 实践创新 理论依据 发展前瞻
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务实进取 开拓创新——天津市津华中学孟昭正校长访谈录
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作者 小松 孟昭正 《天津教育》 北大核心 2003年第9期10-12,共3页
关键词 天津市津华中 孟昭正 校长 人物访谈 师资队伍建设 校管理 理念
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天津市第三中学——百年老学校,世纪新风采
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《天津教育》 北大核心 2005年第12期F0004-F0004,共1页
关键词 天津市第三中 对外交流 特色 校概况
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天津市第五中学 以人为本、自主发展
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《天津教育》 北大核心 2008年第6期F0002-F0002,共1页
天津市第五中学始建于1945年,1978年成为天津市首批市级重点中学。学校占地60000平方米,建筑面积40000平方米,学校教育教学设施齐全、设备先进。学校现有教职工311人,其中特级教师4人,高级教师120人,一级教师108人,学校现有教学班6... 天津市第五中学始建于1945年,1978年成为天津市首批市级重点中学。学校占地60000平方米,建筑面积40000平方米,学校教育教学设施齐全、设备先进。学校现有教职工311人,其中特级教师4人,高级教师120人,一级教师108人,学校现有教学班63个,在校学生近3000人。 展开更多
关键词 天津市第五中 以人为本 自主发展 校教育 特级教师 重点中 建筑面积
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经理乐肇基——讷于言而敏于行的企业家
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《开卷有益(求医问药)》 2024年第4期76-77,共2页
乐达仁先生去世以后,出任达仁堂经理一职的,是乐达仁二弟乐达明之子——32岁的乐肇基。乐肇基出生于1902年,天津达仁堂刚一创办,乐达仁先生就把他从北京带到天津,那一年乐肇基才12岁。在乐达仁的安排下,乐肇基在天津新学书院读完小学和... 乐达仁先生去世以后,出任达仁堂经理一职的,是乐达仁二弟乐达明之子——32岁的乐肇基。乐肇基出生于1902年,天津达仁堂刚一创办,乐达仁先生就把他从北京带到天津,那一年乐肇基才12岁。在乐达仁的安排下,乐肇基在天津新学书院读完小学和中学,又于1921年入上海沪江大学肄业半年。新书学院和沪江大学的英语教学水平著称于一时,乐肇基在这两所学校获益匪浅。1921年秋,乐肇基回到天津,进入南开大学学习化学。乐达仁认为,西医西药来势汹涌,中医中药岌岌可危,中药必须改进,而改进中药首先要学好化学。 展开更多
关键词 中医中药 沪江大 达仁堂 南开大 好化 企业家 天津书院 英语教水平
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天津新学书院校园设计及其“剑桥血统”刍议——记一所已逝的近代校园文化遗产 被引量:2
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作者 吕博 冯刚 +1 位作者 张哲浩 卞洪滨 《建筑学报》 CSSCI 北大核心 2021年第S01期158-164,共7页
挖掘和整理了天津新学书院校园设计与建设的基本情况,以此为基础,比较和分析了其与剑桥大学圣约翰学院两校的校园规划思想和建筑艺术特征。总结了"牛桥"校园传统在19世纪后半叶至20世纪初期对英国本土及部分海外国家及地区的... 挖掘和整理了天津新学书院校园设计与建设的基本情况,以此为基础,比较和分析了其与剑桥大学圣约翰学院两校的校园规划思想和建筑艺术特征。总结了"牛桥"校园传统在19世纪后半叶至20世纪初期对英国本土及部分海外国家及地区的大学校园建设的影响。 展开更多
关键词 天津书院 近代大 院哥特 教会 剑桥
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Design of Offshore Wind Power Foundation with Multi-bucket 被引量:7
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作者 张浦阳 石建超 +1 位作者 丁红岩 郭耀华 《Transactions of Tianjin University》 EI CAS 2016年第6期502-507,共6页
Three- and four-bucket offshore wind power foundations with a new form of force-transferring structure are proposed in this paper, and the integrated finite element model of foundation-soil-transition structure is est... Three- and four-bucket offshore wind power foundations with a new form of force-transferring structure are proposed in this paper, and the integrated finite element model of foundation-soil-transition structure is established by using ABAQUS. The carrying capacity of the proposed foundations is studied under vertical load, horizontal load and bending moment. It can be seen that the vertical bearing capacity of multi-bucket foundation can be roughly estimated by the vertical bearing capacity of single-bucket; the horizontal bearing capacity of the three-bucket foundation scheme is controlled by displacement, while that of the four-bucket foundation scheme is controlled by the internal forces of soils. Moreover, the carrying capacity is provided by the overall structure formed by multi-bucket before soil failure. Compared with the conventional single-bucket foundation, there are mainly tension and pressure that are applied to the multi-bucket foundation, so that the carrying capacity of the foundation can be fully utilized. The probability of soil failure can be well reduced with the proposed multi-bucket foundation, and the stress transmission of force-transferring structure is more consistent through steel beams with variable cross-section. 展开更多
关键词 offshore wind power multi-bucket foundation rotation point force-transferring structure
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Fault Diagnosis of Valve Clearance in Diesel Engine Based on BP Neural Network and Support Vector Machine 被引量:4
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作者 毕凤荣 刘以萍 《Transactions of Tianjin University》 EI CAS 2016年第6期536-543,共8页
Based on wavelet packet transformation(WPT), genetic algorithm(GA), back propagation neural network(BPNN)and support vector machine(SVM), a fault diagnosis method of diesel engine valve clearance is presented. With po... Based on wavelet packet transformation(WPT), genetic algorithm(GA), back propagation neural network(BPNN)and support vector machine(SVM), a fault diagnosis method of diesel engine valve clearance is presented. With power spectral density analysis, the characteristic frequency related to the engine running conditions can be extracted from vibration signals. The biggest singular values(BSV)of wavelet coefficients and root mean square(RMS)values of vibration in characteristic frequency sub-bands are extracted at the end of third level decomposition of vibration signals, and they are used as input vectors of BPNN or SVM. To avoid being trapped in local minima, GA is adopted. The normal and fault vibration signals measured in different valve clearance conditions are analyzed. BPNN, GA back propagation neural network(GA-BPNN), SVM and GA-SVM are applied to the training and testing for the extraction of different features, and the classification accuracies and training time are compared to determine the optimum fault classifier and feature selection. Experimental results demonstrate that the proposed features and classification algorithms give classification accuracy of 100%. 展开更多
关键词 fault diagnosis valve clearance wavelet packet transformation BP neural network support vectormachine genetic algorithm
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Experimental Study on the Resistance of a Transport Ship Navigating in Level Ice 被引量:7
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作者 Yan Huang Jianqiao Sun +1 位作者 Shaopeng Ji Yukui Tian 《Journal of Marine Science and Application》 CSCD 2016年第2期105-111,共7页
This study investigates the resistance of a transport ship navigating in level ice by conducting a series of model tests in an ice tank at Tianjin University. The laboratory-scale model ship was mounted on a rigid car... This study investigates the resistance of a transport ship navigating in level ice by conducting a series of model tests in an ice tank at Tianjin University. The laboratory-scale model ship was mounted on a rigid carriage using a one-directional load cell and then towed through an ice sheet at different speeds. We observed the ice-breaking process at different parts of the ship and motion of the ice floes and measured the resistances under different speeds to determine the relationship between the ice-breaking process and ice resistance. The bending failure at the shoulder area was found to cause maximum resistance. Furthermore, we introduced the analytical method of Lindqvist (1989) for estimating ice resistance and then compared these calculated results with those from our model tests. The results indicate that the calculated total resistances are higher than those we determined in the model tests. 展开更多
关键词 transport ship ice resistance ice-breaking process level ice ice model test
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Estimation of DOA and Polarization Parameters with 2-Level Nested Vector-Sensor Array Based on Quaternion Model 被引量:1
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作者 赵继超 陶海红 《Transactions of Tianjin University》 EI CAS 2016年第6期583-589,共7页
The quaternion coherence problem exists in the data model of the conventional dimensional reduced quaternion estimation of signal parameters via rotational invariance techniques(DRQ-ESPRIT), and DRQ-ESPRIT would lose ... The quaternion coherence problem exists in the data model of the conventional dimensional reduced quaternion estimation of signal parameters via rotational invariance techniques(DRQ-ESPRIT), and DRQ-ESPRIT would lose degrees of freedom(DOFs)when it is used to implement the spatial smooth operation. An improved DRQ-ESPRIT algorithm based on 2-level nested vector-sensor array is proposed in this paper. The quaternion coherence problem is solved by switching the multiplication sequence of spatial direction vector and electric field. Meanwhile, nested array and Khatri-Rao subspace approach are used to increase the number of DOFs, thus the proposed algorithm can estimate more incident sources than DRQ-ESPRIT, and the estimations of direction of arrival(DOA)and polarization parameters are more accurate. Simulation results demonstrate the effectiveness of the proposed algorithm. 展开更多
关键词 QUATERNION nested array Khatri-Rao subspace direction of arrival(DOA) polarization
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Robust MIMO Precoding for Cognitive Multiuser Relay Networks with Imperfect Channel State Information
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作者 俎云霄 揭昕政 《Transactions of Tianjin University》 EI CAS 2016年第6期590-595,共6页
In this paper, a novel robust precoder with imperfect channel state information(CSI)is proposed for multi-input multi-output(MIMO)cognitive multiuser networks equipped with relays. In the proposed model, the secondary... In this paper, a novel robust precoder with imperfect channel state information(CSI)is proposed for multi-input multi-output(MIMO)cognitive multiuser networks equipped with relays. In the proposed model, the secondary users(SUs)are allowed to share the spectrum with the primary users(PUs)when the interference temperature(IT)is below a specific threshold. The transmitting strategy of relays is amplify-and-forward(AF), and the CSI error is characterized in terms of spherical uncertainty region. A minmax problem for the transmit power of the relays is considered when the mean square error(MSE)of SUs and the IT of PU meet their corresponding thresholds, and it is transformed into a semi-definite programming(SDP)problem to search for the solution. Numerical simulations demonstrate the effectiveness of the proposed precoder. 展开更多
关键词 cognitive radio multi-input multi-output imperfect channel state information semi-definite programming robust precoding
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Contour Detection-Based Realistic Finite-Difference-Time-Domain Models for Microwave Breast Cancer Detection
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作者 王梁 肖夏 +2 位作者 宋航 路红 刘佩芳 《Transactions of Tianjin University》 EI CAS 2016年第6期572-582,共11页
In this paper, a collection of three-dimensional(3D)numerical breast models are developed based on clinical magnetic resonance images(MRIs). A hybrid contour detection method is used to create the contour, and the int... In this paper, a collection of three-dimensional(3D)numerical breast models are developed based on clinical magnetic resonance images(MRIs). A hybrid contour detection method is used to create the contour, and the internal space is filled with different breast tissues, with each corresponding to a specified interval of MRI pixel intensity. The developed models anatomically describe the complex tissue structure and dielectric properties in breasts. Besides, they are compatible with finite-difference-time-domain(FDTD)grid cells. Convolutional perfect matched layer(CPML)is applied in conjunction with FDTD to simulate the open boundary outside the model. In the test phase, microwave breast cancer detection simulations are performed in four models with varying radiographic densities. Then, confocal algorithm is utilized to reconstruct the tumor images. Imaging results show that the tumor voxels can be recognized in every case, with 2 mm location error in two low density cases and 7 mm─8 mm location errors in two high density cases, demonstrating that the MRI-derived models can characterize the individual difference between patients' breasts. 展开更多
关键词 3D breast model contour detection finite-difference-time-domain(FDTD) convolutional perfectmatched layer(CPML) microwave imaging
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Real-Time Grouting Monitoring and Visualization Analysis System for Dam Foundation Curtain Grouting
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作者 樊贵超 钟登华 +3 位作者 任炳昱 崔博 李晓超 岳攀 《Transactions of Tianjin University》 EI CAS 2016年第6期493-501,共9页
A real-time monitoring and 3D visualization analysis system is proposed for dam foundation curtain grouting. Based on the real-time control technology, the optimization method and the set theory, a mathematical model ... A real-time monitoring and 3D visualization analysis system is proposed for dam foundation curtain grouting. Based on the real-time control technology, the optimization method and the set theory, a mathematical model of the system is established. The real-time collection and transmission technology of the grouting data provides a data foundation for the system. The real-time grouting monitoring and dynamic alarming method helps the system control the grouting quality during the grouting process, thus, the abnormalities of grouting, such as jacking and hydraulic uplift, can be effectively controlled. In addition, the 3D grouting visualization analysis technology is proposed to establish the grouting information model(GIM). The GIM provides a platform to visualize and analyze the grouting process and results. The system has been applied to a hydraulic project of China as a case study, and the application results indicate that the real-time grouting monitoring and 3D visualization analysis for the grouting process can help engineers control the grouting quality more efficiently. 展开更多
关键词 dam foundation curtain grouting real-time monitoring dynamic alarming model grouting informationmodel (GIM) 3D visualization analysis
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Influence of Wind Speed, Stay Cable Inclination Angle and Wind Yaw Angle on Formation of Rivulets
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作者 毕继红 武骥 +1 位作者 关键 王剑 《Transactions of Tianjin University》 EI CAS 2016年第6期508-515,共8页
Combining lubrication theory and CFD technology, a finite element model is established to simulate the rain-wind-induced vibration(RWIV). Based on Spalart-Allmaras(S-A)turbulence type, COMSOL software is adopted to ca... Combining lubrication theory and CFD technology, a finite element model is established to simulate the rain-wind-induced vibration(RWIV). Based on Spalart-Allmaras(S-A)turbulence type, COMSOL software is adopted to calculate the wind pressure coefficient and wind friction coefficient that vary with the location and time. To verify the veracity and rationality of this method, the formation and evolution of rivulets at different wind speeds are studied and compared with the existing experimental results. Furthermore, the time, location, height and width of the initial formation of rivulets are analyzed at different wind speeds, cable inclination angles and wind yaw angles. The results show that the three influencing factors mentioned above have great effect on the formation of rivulet, and the influencing tendency, range and degree are different from each other. 展开更多
关键词 rain-wind-induced vibration RIVULET wind speed wind yaw angle cable inclination angle
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Features of Flow Past Square Cylinder with a Perforated Plate
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作者 汪健生 徐亚坤 程浩杰 《Transactions of Tianjin University》 EI CAS 2016年第6期544-554,共11页
A numerical investigation was performed on the reduction of the fluid forces acting on the square cylinder in the laminar flow regime with a perforated plate. The effects of geometric parameters such as the distance b... A numerical investigation was performed on the reduction of the fluid forces acting on the square cylinder in the laminar flow regime with a perforated plate. The effects of geometric parameters such as the distance between the square cylinder and the perforated plate on the wake of the square cylinder were discussed. Furthermore, the flow characteristics such as the drag coefficient, lift coefficient, Strouhal number and flow pattern were obtained. It can be concluded that the drag force of the square cylinder reduces to some extent due to the addition of the perforated plate. The flow structure varies when the perforated plate is located behind the square cylinder. Moreover, the recirculation zone augments with the increase of L/D, and the vortex trace on the upper and lower surface of the square cylinder moves gradually backwards until a stable recirculation zone formed between the square cylinder and the perforated plate. 展开更多
关键词 square cylinder perforated plate drag reduction vortex shedding flow pattern
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Wave Protection Effect of Periodic Row of Bottom-Hinged Flap-Type Wave Energy Converters
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作者 王冬姣 邱守强 +1 位作者 叶家玮 梁富琳 《Transactions of Tianjin University》 EI CAS 2016年第6期563-571,共9页
A flap-type wave energy converter(WEC) is combined with a nearshore breakwater to expand the application of WECs both economically and environmentally. Based on the linear potential theory, an eigenfunction expansion ... A flap-type wave energy converter(WEC) is combined with a nearshore breakwater to expand the application of WECs both economically and environmentally. Based on the linear potential theory, an eigenfunction expansion solution is developed for a periodic row of bottom-hinged flap-type WECs exposed to normal waves. Additionally, the viscous effect is considered using the ship rolling solution method with a viscous damping term included in the equation of motion, and the viscous damping expression is also described. The proposed solution is verified by comparison with published literatures. The results including the wave energy conversion efficiency, the reflected and transmitted proportion of the incident wave energy are presented for a range of wave periods and geometric ratios. It is demonstrated that better wave protection effects can be attained with smaller gaps between the WECs, where the transmitted proportion of the incident wave energy is lower. An optimal geometric ratio thus exists for a given wave power absorption and a specific wave period. 展开更多
关键词 wave energy converter bottom-hinged flap eigenfunction expansion wave protection
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