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Chinese Journal of Chemical Engineering 2018年第5期26卷 1059-1063页

作者： Dong-Ho Lee jiin you Je-Min Woo Jung Yoon Seo young Cheol Park Jong-Seop Lee Hyunuk Kim Jong-Ho Moon Seung Bin Park Greenhouse Gas Laboratory Korea Institute of Energy Research Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology Energy Material Laboratory Korea Institute of Energy Research

The influence of the dehydration by metal oxides on the synthesis of dimethyl carbonate(DMC) via oxidative carbonylation of methanol was studied. A Cu/Y-zeolite catalyst was prepared by the ion exchange method from CuCl_2·2 H_2O and the commercial NH_4-form of the Y type zeolite. The catalyst was characterized by X-ray fluorescence(XRF), N_2 adsorption(BET method), X-ray diffraction(XRD), and temperature-programmed desorption of ammonia(NH_3-TPD) to evaluate its Cu and Cl content, surface area, structure, and acidity. Reaction tests were carried out using an autoclave(batch reactor) for 18 h at 403 K and 5.5 MPa(2CH_3OH + 1/2O_2+CO?(CH_3O)_2CO + H_2O). The influence of various dehydrating agents(ZnO, MgO, and CaO) was examined with the aim of increasing the methanol conversion(X_(MeOH), MeOH conversion). The MeOH conversion increased upon addition of metal oxides in the order CaO >> MgO > ZnO, with the DMC selectivity(SDMC) following the order MgO >CaO > ZnO. The catalysts and dehydrating agents were characterized before and after the oxidative carbonylation of methanol by thermogravimetric and differential thermogravimetric(TG/DTG), and XRD to confirm that the dehydration reaction occurred via the metal oxide(MO + H_2O → M(OH)_2). The MeOH conversion increased from 8.7% to 14.6% and DMC selectivity increased from 39.0% to 53.1%, when using the dehydrating agent CaO.

关键词：金属氧化物脱水反应催化剂代理人碳酸盐甲醇合成直接数字控制

Two-Dimensional Fin Efficiency of Plate Fin-Tube Heat Exchangers Under Partially and Fully Wet Conditions

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Journal of Thermal Science 2002年第3期11卷 249-254页

作者： jiin-Yuh Jang Chien-Nan Lin Natl Cheng Kung Univ Dept Mech Engn Tainan 70101 Taiwan

This paper presents the two-dimensional analysis for the efficiency of continuous plate fin-tube heat exchangers in staggered and in-lined arrangements under the dry, partially wet, and fully wet conditions for different heat transfer coefficient (h = 20 W/m2K to h = 80 W/m2K) and air relative humidity over the full range from φ= 0 % to φ= 100%. It is shown that the fin efficiencies of the staggered arrangement are higher than those for the in-lined arrangement, and the fully wet fin efficiency is 10~20% lower than that for a dry fin. The conventional 1-D sector method underestimates the fin efficiency up to 4 % as compared to the 2-D analysis.

关键词： fin efficiency plate fin-tube partially and fully wet.

Reverse Roll Coating Flow with Non-Newtonian Fluids

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Communications in Computational Physics 2009年第8期6卷 536-552页

作者： jiin-Yuh Jang Peng-Yuan Chen Department of Mechanical Engineering National Cheng-Kung UniversityTainan70101 Taiwan

In this study an incompressible flow with non-Newtonian fluids in the reverse roll coating process was ***-Newtonian behavior of the coating fluid was accounted by using power law model with power index,n,ranging from 0.8 to *** of roll speed ratio(V2/V1)of the panel roll to the applicator roll and gap distance on the coating film thickness were also *** results were in good agreement with those of experimental data within 15%-20%.Results indicated that the film thickness ratios are function of power-law index,roll speed ration and ratio of roll radius to gap *** equations for film thickness ratio were obtained from numerical results as shown below:■,where t1,t2 and t3 are inlet film,transferred film and leakage film thickness,respectively,n is power-law index,V1 and V2 are roll speed of applicator roll and panel roll,Rm is average radius of two rolls and H0 is gap *** correlations are accurate within 10%for 0.8≤n≤1.2,0.5≤V_(2)/V_(1)≤2,and 7.7×10^(−5)≤H_(0)/R_(m)≤1.54×10^(−4).

关键词： Reverse roll coating non-Newtonian flow power-law

Effects of solution treatment and cold rolling on structure and tensile properties of hot-rolled Ti-7.5Mo alloy

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Journal of Iron and Steel Research(International) 2019年第12期26卷 1366-1375页

作者： Yen-chun Chen Chien-ping Ju jiin-huey Chern Lin Department of Materials Science and Engineering ChengKung UniversityTaiwan 70101China

The effects of solution treatment(ST)and cold rolling(CR)on structure and tensile properties of a heavily hot-rolled(HR)Ti–7.5Mo alloy were *** results indicated that,after HR with a one-pass 65%reduction in thickness,the pores in as-received samples substantially disappeared,the misorientation angle distribution became broader,and grain texture shifted toward.Post-HR ST produced an orthorhombicα''-phase with fine needle-type morphology and caused misorientation to narrow down to 55°–65°with substantially random texture;post-ST CR caused misorientation shift toward high-angle side and texture towardand.With an increase in reduction in thickness,α'(102)intensity increased at the expense of two adjacent(112)/(022)α''-*** X-ray diffraction,metallography and electron backscattered diffraction on scanning electron microscope results indicated that pre-ST HR did not affect the formation of the desired low-modulusα''-phase when the alloy was subsequently *** a practical point of view,the most optimal tensile properties may be found in the sample solution-treated at 900°C for 30 min and cold-rolled by a 20%reduction in thickness,which demonstrated a yield strength of 924 MPa,an ultimate tensile strength of 933 MPa,a tensile modulus of 73 GPa,and an elongation of 26%.

关键词： Titanium alloy Ti–Mo alloy Electron backscattered diffraction Microstructure Mechanical property

Data-Hiding Based on Sudoku and Generalized Exploiting Modification Direction

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Journal of Electronic Science and Technology 2018年第2期16卷 123-128页

作者： jiin-Chiou Cheng Wen-Chung Kuo Bo-Rong Su Department of Computer Science and Information Engineering Southern Taiwan University of Science and TechnologyTainan City 710 Department of Computer Science and Information Engineering National Yunlin University of Science and TechnologyYunlin 64002

Division arithmetic and generalized exploiting modification direction （DA-GEMD） method has perfect efficiency in data-hiding. However, there exist some weaknesses in DA-GEMD. Because the benchmarks are their median of nine pixels in each block of cover-image, it will give a hint for the attacker to hack the stego-image. In the paper, we utilize the Sudoku table to randomize the benchmark for each 3×3 block of cover-image. It will mix up the pixels in each image block and prevent the secret information from being extracted. The proposed method still keeps the original efficiency as DA-GEMD while promoting the security for data-hiding.

关键词： Cover-image division arithmetic and generalized exploiting modification direction(DAGEMD) stego-image Sudoku

Huge pelvi-abdominal malignant inflammatory myofibroblastic tumor with rapid recurrence in a 14-year-old boy

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World Journal of Gastroenterology 2010年第21期16卷 2698-2701页

作者： Chia-Hsun Lu Hsuan-Ying Huang Han-Koo Chen jiin-Haur Chuang Shu-Hang Ng Sheung-Fat Ko Department of Radiology Chang Gung Memorial Hospital-Kaohsiung Medical CenterChang Gung University College of MedicineKaohsiung Hsien833TaiwanChina Department of Pathology Chang Gung Memorial Hospital-Kaohsiung Medical CenterChang Gung University College of MedicineKaohsiung Hsien833TaiwanChina Department of Pediatric Surgery Chang Gung Memorial Hospital-Kaohsiung Medical CenterChang Gung University College of MedicineKaohsiung Hsien833TaiwanChina

Inflammatory myofibroblastic tumor(IMT) is an uncommon benign neoplasm with locally aggressive behavior but malignant change is *** report an unusual case of pelvic-abdominal inflammatory myofibroblastic tumor with malignant transformation in a 14-year-old boy presenting with abdominal pain and 9 kg body weight loss in one *** tomography revealed a huge pelvi-abdominal mass(30 cm),possibly originating from the pelvic extraperitoneal space,protruding into the abdomen leading to upward displacement of the bowel loops,downward displacement of the urinary bladder,massive central necrosis,a well-enhanced peripheral solid component with prominent peritumoral *** examination confirmed the computed tomographic *** examination revealed proliferative epitheloid and spindle cells,inflammatory cell infiltration and high mitotic *** was strongly positive for anaplastic lymphoma kinase and revealed a high proliferative index(ki-67 = 40%).DNA sequencing and electronic microscopy further confirmed the primitive fibroblastic cell phenotype of the tumor and a final diagnosis of inflammatory myofibroblastic tumor with malignant transformation was *** tumor recurrence was noted 20 d after radical tumor *** our knowledge,this is the largest documented case of IMT in a pediatric patient and the first report of IMT with malignant transformation originating from the pelvic extraperitoneal space.

关键词： Inflammatory myofibroblastic tumor Malignant transformation Pediatric patient Pelvis Extraperitoneal space Computed tomography

Numerical Study of a Confined Axisymmetric Jet Impingement Heat Transfer with Nanofluids

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Engineering（科研） 2013年第1期5卷 69-74页

作者： Jun-Bo Huang jiin-Yuh Jang Department of Mechanical Engineering National Cheng-Kung University Tainan Taiwan 70101

A numerical simulation on confined impinging circular jet working with a mixture of water and Al2O3 nanoparticles is investigated. The flow is turbulent and a constant heat flux is applied on the heated plate. A two-phase mixture model approach has been adopted. Different nozzle-to-plate distance, nanoparticle volume concentrations and Reynolds number have been considered to study the thermal performances of the system in terms of local, average and stagnation point Nusselt number. The local Nusselt number profiles show that the highest values within the stagnation point region, and the lowest at the end of the heated plate. It is observed that the average Nusselt number increases for increasing nanoparticle concentrations, moreover, the highest values are observed for H/D=5, and a maximum increase of 10% is obtained at a concentration equal to 5%.

关键词： Nanofluid Confined Jet Turbulent flow

Comparison between Neural Network and Adaptive Neuro-Fuzzy Inference System for Forecasting Chaotic Traffic Volumes

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Journal of Intelligent Learning Systems and Applications 2012年第4期4卷 247-254页

作者： jiin-Po Yeh Yu-Chen Chang Department of Civil and Ecological Engineering I-Shou University Kaohsiung City Taiwan Institute of Civil Engineering Technology National Kaohsiung University of Applied Sciences Kaohsiung City Taiwan.

This paper applies both the neural network and adaptive neuro-fuzzy inference system for forecasting short-term chaotic traffic volumes and compares the results. The architecture of the neural network consists of the input vector, one hidden layer and output layer. Bayesian regularization is employed to obtain the effective number of neurons in the hidden layer. The input variables and target of the adaptive neuro-fuzzy inference system are the same as those of the neural network. The data clustering technique is used to group data points so that the membership functions will be more tailored to the input data, which in turn greatly reduces the number of fuzzy rules. Numerical results indicate that these two models have almost the same accuracy, while the adaptive neuro-fuzzy inference system takes more time to train. It is also shown that although the effective number of neurons in the hidden layer is less than half the number of the input elements, the neural network can have satisfactory performance.

关键词： Neural Network Adaptive Neuro-Fuzzy Inference System Chaotic Traffic Volumes State Space Reconstruction

Application of the Adaptive Neuro-Fuzzy Inference System for Optimal Design of Reinforced Concrete Beams

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Journal of Intelligent Learning Systems and Applications 2014年第4期6卷 162-175页

作者： jiin-Po Yeh Ren-Pei Yang Department of Civil and Ecological Engineering I-Shou University Kaohsiung Taiwan

Using a genetic algorithm owing to high nonlinearity of constraints, this paper first works on the optimal design of two-span continuous singly reinforced concrete beams. Given conditions are the span, dead and live loads, compressive strength of concrete and yield strength of steel;design variables are the width and effective depth of the continuous beam and steel ratios for positive and negative moments. The constraints are built based on the ACI Building Code by considering the strength requirements of shear and the maximum positive and negative moments, the development length of flexural reinforcement, and the serviceability requirement of deflection. The objective function is to minimize the total cost of steel and concrete. The optimal data found from the genetic algorithm are divided into three groups: the training set, the checking set and the testing set for the use of the adaptive neuro-fuzzy inference system (ANFIS). The input vector of ANFIS consists of the yield strength of steel, compressive strength of concrete, dead load, span, width and effective depth of the beam;its outputs are the minimum total cost and optimal steel ratios for positive and negative moments. To make ANFIS more efficient, the technique of Subtractive Clustering is applied to group the data to help streamline the fuzzy rules. Numerical results show that the performance of ANFIS is excellent, with correlation coefficients between the three targets and outputs of the testing data being greater than 0.99.

关键词： Continuous Reinforced Concrete Beams Genetic Algorithm Adaptive Neuro-Fuzzy Inference System Correlation Coefficients

作为第二语言的英语对韩国初级汉语学习者语法习得的影响

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作为第二语言的英语对韩国初级汉语学习者语法习得的影响

作者： Park jiin（朴智仁）青岛大学

学位级别：硕士

本研究的目的是,观察第二语言英语在韩国人学习作为第三语言的汉语过程中是否产生影响。大部分针对韩国学习者的汉语研究都是以研究韩语和汉语两种语言之间的关系为主的第二语言研究。但实际上,对于在小学、初中、高中课程中作为必修科... 详细信息

本研究的目的是,观察第二语言英语在韩国人学习作为第三语言的汉语过程中是否产生影响。大部分针对韩国学习者的汉语研究都是以研究韩语和汉语两种语言之间的关系为主的第二语言研究。但实际上,对于在小学、初中、高中课程中作为必修科目学习英语的大多数韩国人来说,汉语却是第三语言。第三语言习得与第二语言习得存在着明显的差异。因此,有必要将汉语当作第三语言来研究汉语。本文首先介绍研究的目的和意义、先行研究、相关理论。本文研究方式新颖之处在于在进行问卷调查之前,先进行问卷调查的结果预测。对韩语、英语、汉语的七种语法点进行对比分析,我们按照韩国学习者受到韩语迁移更多,还是英语迁移更多,将分为两种情况预测答案。问卷调查分为三个部分,第一部分是学习者的基本学习背景,第二部分是对学习汉语时受到韩语和英语影响的调查,第三部分是汉语语言测试。为了了解根据英语和汉语熟练程度的不同如何回答,以英语和汉语水平各不相同的人作为对象进行了问卷调查。汉语语言测试的语法项目包括基本谓语的位置、双宾句、兼语句、定语、反问句,连词、介词短语。通过问卷调查分析得出的结果是:1)学习汉语时,韩语在汉字和词汇方面有所帮助,在语法方面有所干扰,英语在语法方面有所帮助,在任何方面都不会干扰的回答率最高。通过汉语测试分析得出的结果是:1)英语水平较低的A组,有59.8%的学生的答案与韩语相似,29.2%的学生的答案与英语相似,英语水平较高的B组,有25.4%的学生的答案与韩语相似,65.1%的学生的答案与英语相似。汉语初级水平的两组答题结果不一致。2)汉语中高级水平的CD组,与英语水平无关,正确答案率大增,呈现出两组答题一致的倾向。本文的意义在于确认韩国学习者在学习汉语语法过程中英语是否确有影响,其中的积极的作用,可以应用于汉语学习中。

关键词：第三语言第三语言习得语言迁移汉语语法习得