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Numerical Study on Breaking Criteria for Solitary Waves

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China Ocean Engineering 2003年第4期18卷 589-604页

作者： chung-ren chou Ruey-syan SHIH John Z. YIM Department of Harbor and River Engineering Taiwan Ocean University Keelung ChinaDepartment of Civil Engineering Tung Nan Institute of Technology Taipei ChinaDepartment of Harbor and River Engineering Taiwan Ocean University Keelung China

Studies of the breaking criteria for solitary waves on a slope are presented in this paper. The boundary element method is used to model the processes of shoaling and breaking of solitary waves on various slopes. Empirical formulae that can be used to characterize the breaking of solitary waves are presented. These include the breaking index, the wave height, the water depth, and the maximum particle velocity at the point of breaking. Comparisons with the results of other researches are given.

关键词： boundary element breaking indices empirical formula solitary wave

Experimental Investigation of Wave Heights in A Directional Wave Field Through Image Sequences

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China Ocean Engineering 2005年第1期19卷 37-48页

作者： chung-ren chou Teng-Wei LIN Ruey-Syan SHIH John Z. YIMa Department of Harbor and River Engineering National Taiwan Ocean UniversityKeeling 20299 ChinaDepartment of Harbor and River Engineering National Taiwan Ocean UniversityKeeling 20299 ChinaDepartment of Civil Engineering Tung Nan Institute of Technology Taipei 22202 ChinaDepartment of Harbor and River Engineering National Taiwan Ocean UniversityKeeling 20299 China

Measurements of wave heights with image sequences from a Charged Coupled Device(CCD) camera were made. Sinusoidal, as well as unidirectional and directional, waves were used for the experiments. A transfer function was obtained by calibration of the magnitudes of the gray values of the images against the results of wave gauge measurements for directional waves. With this transfer function, wave heights for regular waves were deduced. It is shown that the average relative errors are smaller than 16% for both unidirectional and directional waves.

关键词： charged coupled device remote sensing directional wave transfer function wave height measurements

Validation of a steel dual-core self-centering brace （DC-SCB） for seismic resistance： from brace member to one-story one-bay braced frame tests

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Frontiers of Structural and Civil Engineering 2016年第3期10卷 303-311页

作者： chung-Che chou Ping-Ting chung Tsung-Han WU Alexis Rafael Ovalle BEATO Department of Civil Engineering Taiwan University Taipei Taiwan China Director Center for Earthquake Engineering Research (CEER) Taiwan University Taipei Taiwan China

A steel dual-core self-centering brace （DC-SCB） is an innovative structural member that provides both energy dissipation and self-centering properties to structures, reducing maximum and residual drifts of structures in earthquakes. The axial deformation capacity of the DC-SCB is doubled by a parallel arrangement of two inner cores, one outer box and two sets of tensioning elements. This paper presents cyclic test results of a DC-SCB component and a full- scale one-story, one-bay steel frame with a DC-SCB. The DC-SCB that was near 8 m-long was tested to evaluate its cyclic behavior and durability. The DC-SCB performed well under a total of three increasing cyclic loading tests and 60 low- cycle fatigue loading tests without failure. The maximum axial load of the DC-SCB was near 1700 kN at an interstory drift of 2.5%. Moreover, a three-story dual-core self-centering braced frame （DC-SCBF） with a single-diagonal DC-SCB was designed and its first-story, one-bay DC-SCBF subassembly specimen was tested in multiple earthquake-type loadings. The one-story, one-bay subassembly frame specimen performed well up to an interstory drift of 2% with yielding at the column base and local buckling in the steel beam; no damage of the DC-SCB was found after all tests. The maximum residual drift of the DC-SCBF caused by beam local buckling was 0.5% in 2.0% drift cycles.

关键词： dual-core self-centering brace (DC-SCB) braced frame tests residual deformation

A Two-Soliton Solution of Cubic Schrodinger Equation

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Chinese Physics Letters 1996年第1期13卷 17-19页

作者： YAN Jia-ren chou Guang-hui WANG Xiao-gang Department of Physics Hu'nan Normal UniversityChangsha 410081

An exact two-soliton solution of cubic Schrodinger equation is derived by using the inverse scattering method,where the transmission coefficient has one pole of second order instead of two simple *** solution describes such a process that two infinitely separated solitons approach and then pass through each other and keep straight on infinitely.

关键词： infinitely straight soliton

Glucose Oxidase/Polypyrrole Biosensor Fabricated by Galvanostatic Electropolymerization Accompanied with a Potential Jumping

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稀有金属材料与工程 2006年第A3期35卷 277-281页

作者： Yuh-Ming Uangl Hung-Te chung Tse-Chuan chou Department of Chemical Engineering WuFeng Institute of TechnologyChiayiTaiwan62153China Dpartment of Chemical Engineering National Cheng Kung UniversityTainanTaiwan70101China

A galvanostatic glucose oxidase (GOD_x)/polypyrrole (Ppy) biosensor fabricated through a potential jumping process was *** spite of the instantaneous voltage jumping from 0.95 V to 1.7 V versus Ag/AgCl in the galvanostatic polymerization of pyrrole with commercial GOD_x,this GOD_x enzyme still could be successfully bundled with polypyrrole (Ppy).And,the results also confirmed that this glucose sensor not only possessed of better sensitivity to glucose than that fabricated from potentiometry or mild voltage elevating galvanometry for the similar preparing conditions but also exhibited two-week long-term ***,the kinetic data of Michalis constant (K_m) and Maximum current (I_m) for the optimized sensor were *** discovery this electro-modification process may disclose a novel method for fabricating the other enzyme biosensors.

关键词： conformation conducting galvanostatic dentritic jumping

Calculation and Analysis of Sulfide Capacities for CaO-Al_2O_3-SiO_2-MgO-TiO_2 Slags

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Journal of Iron and Steel Research International 2013年第9期20卷 21-25页

作者： ren Zhong-shan HU Xiao-jun chou Kuo-chih State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Department of Physical and Chemistry School of Metallurgical Ecological EngineeringUniversity of Science and Technology Beijing

The empirical models of sulfide capacity calculated by traditional optical basicity do not consider the charge compensation of alkaline metal ions to AP＋ in the molten slags, so that the deviations between the calculated values and measured ones of sulfide capacity are inevitable. The relation between sulfide capacity and the corrected optical basicity put forward by Mills considering the charge compensation was investigated. Combined with the relation be- tween sulfide capacity and temperatures, a novel and accurate calculation model of sulfide capacity was proposed, which was applied to calculate the sulfide capacities of CaO-Al2 O3-SiO2-MgO and CaO-Al2 03-SiO2-MgO-TiO2 sys-tems, where the sum of the CaO and MgO concentrations in the slags must be not lower than the Al2O3 concentra tion. It was also found that the calculated values were in a good agreement with the measured values, and the mean deviations were 2.57% and 2.65%, respectively.

关键词： slag sulfide capacity charge compensation corrected optical basicity mean deviation

Seismic tests of post-tensioned self-centering building frames with column and slab restraints

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Frontiers of Structural and Civil Engineering 2011年第3期5卷 323-334页

作者： chung-Che chou Jun-Hen CHEN Department of Civil Engineering Taiwan UniversityTaipeiChina Federal Engineering Consultant Inc. TaipeiChina

Post-tensioned(PT)self-centering moment frames have been developed as an alternative to typical moment-resisting frames(MRFs)for earthquake *** a PT frame deforms laterally,gaps between the beams and columns ***,the gaps are constrained by the columns and the slab in a real PT selfcentering building *** paper presents a methodology for evaluating the column restraint and beam compression force based on the column deformation and gap openings at all *** method is verified by cyclic tests of a full-scale,two-bay by one-story PT ***,a sliding slab is proposed to minimize restraints on the expansion of the PT *** table tests were conducted on a reduced-scale,two-by-two bay one-story specimen,which comprises one PT frame and two gravitational *** PT frame and gravitational frames are self-centering throughout the tests,responding in phase with only minor differences in peak drifts caused by expansion of the PT *** the specimen is excited by a simulation of the 1999 Chi-Chi earthquake with a peak ground acceleration of 1.87 g,the maximum interstory drift and the residual drift are 7.2%and 0.01%,respectively.

关键词： post-tensioned frame frame expansion column restraint sliding slab frame test shake table test

Large-scale low-frequency rainfall regimes and their transition modes in summertime over China

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Chinese Science Bulletin 2006年第11期51卷 1355-1367页

作者： ren Hongli ZHANG Peiqun chou Jifan LI Weijing GAO Li College of Atmospheric Sciences Lanzhou University Lanzhou 730000 China Laboratory for Climate Studies National Climate Centre China Meteorological Administration Beijing 100081 China LASG Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

Seven large-scale low-frequency rainfall regimes (LFRRs) in summertime are identified for China in a 10-dimensional phase space by using a 40-year daily precipitation dataset. Corresponding to the local extrema of observed probability density in phase space, the LFRRs are characterized by the persistence and transitions that reflect the spread and jump features of low-frequency rainfall centers. The LFRRs are generally consistent with summer monsoon rainbelts on the intraseasonal timescale, and there exist the preferred transition relationships between the LFRRs. Four LFRRs’ transition modes (LFRRTMs), which are the dominant components of the interannual and intraseasonal variability of sum- mer rainfall in China, are further induced. Analyses of atmospheric circulation system show that the anomalies of the subtropical high over the western Pacific (SHWP) and blockings in mid-high latitudes, the low-latitude circulation anomalies, and the wavetrains over the East Asia-Pacific region (EAPWs), play crucial roles in the occurrence and transitions of the LFRRs. Moreover, the evolution of the SHWP and blockings, the distribution and movement of the EAPWs, and the intraseasonal variability of the East Asian-Pacific jet stream may be principal factors of the formations of the LFRRTMs.

关键词：夏季降雨相空间低频降雨体系大尺度预报

Impact of body mass index and gender on quality of life in patients with gastroesophageal reflux disease

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World Journal of Gastroenterology 2012年第36期18卷 5090-5095页

作者： Shou-Wu Lee Han-chung Lien Chi-Sen Chang Yen-Chun Peng chung-Wang Ko Ming-Chih chou Institute of Medicine Chung Shan Medical University Division of Gastroenterology Department of Internal MedicineTaichung Veterans General Hospital Department of Medicine Chung Shan Medical University Department of Medicine China Medical University

AIM： To investigate the symptom presentation and quality of life in obese Chinese patients with gastro- esophageal reflux disease （GERD）. MKTHODS： Data from patients diagnosed with GERD according to the Montreal definition, were collected between January 2009 to March 2010. The enrolled patients were assigned to the normal [body mass in- dex （BMI）〈 25 kg/m2], overweight （25-30 kg/m2）, and obese （BMI 〉 30 kg/m2） groups. General demographic data, endoscopic findings, and quality of life of the three groups of patients were analyzed and *** 15 patients were classified in the normal, over- weight, and obese, respectively. There was significantly more erosive esophagitis （73.3% vs 64.3% vs 39.2%, P = 0.002）, hiatal hernia （60% vs 33.9% vs 16.7%, P = 0.001）, and males （73.3% vs 73.2% vs 32.4%, P = 0.001） in the obese cases. The severity and frequency of heartburn, not acid regurgitation, was positively cor- related with BMI, with a significant association in men, but not in women. Obese patients were prone to have low quality of life scores, with obese women having the lowest scores for mental health. CONCLUSION： In patients with GERD, obese men had the most severe endoscopic and clinical presenta- tion. Obese women had the poorest mental health.

关键词： Gastroesophageal reflux disease Gender Heartburn Life's quality Obesity