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A new proof of generalized Tychonoff theorem in $(L,M)$-fuzzy topological spaces
Hu Zhao,Hong-ying Zhang 원광대학교 기초자연과학연구소 2018 ANNALS OF FUZZY MATHEMATICS AND INFORMATICS Vol.16 No.2
In this paper, using the structures of $(L,M)$-fuzzy topological product spaces which were introduced by Hu Zhao, Sheng-Gang Li and Gui-Xiu Chen, we directly give another version on the proof of generalized Tychonoff theorem in $(L,M)$-fuzzy topological spaces which was introduced by Hong-Yan Li and Fu-Gui Shi
朴天弘,李厚祥 國立 昌原大學校 産業技術硏究所 1989 産技硏論文集 Vol.3 No.-
The purpose of the present paper is to analyze the load and thermal characteristics of double-pad type hydrostatic oil bearings with capillary restrictor. For the calculation of thermal effect, it is assumed that the clearance of bearing is isothermal and that the friction power is entirely converted to thermal energy. The Finite Element Method is used for the analyses. The results obtained are as follows. 1) As the recess pressure ratio is being increased, load capacity is also increasing in lower eccentricities. But the tendency is reversed in higher eccentricities respectively. 2) As the recess pressure ratio is being increased, temperature rise is decreasing. 3) The predicted temperature rise shows excellent agreement with the measured at 0.8 of convection ratio. 4) The analysis method proposed is considered to be effective to estimate the static characteristics of double-pad type hydrostatic oil bearings with rotating shaft.
Li, Hong-Sheng,Chen, Jin-Hu,Zhang, Wei,Shang, Dong-Ping,Li, Bao-Sheng,Sun, Tao,Lin, Xiu-Tong,Yin, Yong Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.3
Objective: To evaluate the effect of intravenous contrast on dose calculation in radiation treatment planning for oesophageal cancer. Methods: A total of 22 intravein-contrasted patients with oesophageal cancer were included. The Hounsfield unit (HU) value of the enhanced blood stream in thoracic great vessels and heart was overridden with 45 HU to simulate the non-contrast CT image, and 145 HU, 245 HU, 345 HU, and 445 HU to model the different contrast-enhanced scenarios. 1000 HU and -1000 HU were used to evaluate two non-physiologic extreme scenarios. Variation in dose distribution of the different scenarios was calculated to quantify the effect of contrast enhancement. Results: In the contrast-enhanced scenarios, the mean variation in dose for planning target volume (PTV) was less than 1.0%, and those for the total lung and spinal cord were less than 0.5%. When the HU value of the blood stream exceeded 245 the average variation exceeded 1.0% for the heart V40. In the non-physiologic extreme scenarios, the dose variation of PTV was less than 1.0%, while the dose calculations of the organs at risk were greater than 2.0%. Conclusions: The use of contrast agent does not significantly influence dose calculation of PTV, lung and spinal cord. However, it does have influence on dose accuracy for heart.
An optical fibre monitoring system for evaluating the performance of a soil nailed slope
Hong-Hu Zhu,Albert N.L. Ho,Jian-Hua Yin,H.W. Sun,Hua-Fu Pei,Cheng-Yu Hong 국제구조공학회 2012 Smart Structures and Systems, An International Jou Vol.9 No.5
Conventional geotechnical instrumentation techniques available for monitoring of slopes, especially soil-nailed slopes have limitations such as electromagnetic interference, low accuracy, poor longterm reliability and difficulty in mounting a series of strain sensors on a soil nail bar with a small-diameter. This paper presents a slope monitoring system based on fibre Bragg grating (FBG) sensing technology. This monitoring system is designed to perform long-term monitoring of slope movements, strains along soil nails, and other slope reinforcement elements. All these FBG sensors are fabricated and calibrated in laboratory and a trial of this monitoring system has been successfully conducted on a roadside slope in Hong Kong. As part of the slope stability improvement works, soil nails and a toe support soldier-pile wall were constructed. During the slope works, more than 100 FBG sensors were installed on a soil nail, a soldier pile, and an in- place inclinometer. The paper presents the layout and arrangement of the instruments as well as the installation procedures adopted. Monitoring data have been collected since March 2008. This trial has demonstrated the great potential of the optical fibre monitoring system for long-term monitoring of slope performance. The advantages of the slope monitoring system and experience gained in the field implementation are also discussed in the paper.
An optical fibre monitoring system for evaluating the performance of a soil nailed slope
Zhu, Hong-Hu,Ho, Albert N.L.,Yin, Jian-Hua,Sun, H.W.,Pei, Hua-Fu,Hong, Cheng-Yu Techno-Press 2012 Smart Structures and Systems, An International Jou Vol.9 No.5
Conventional geotechnical instrumentation techniques available for monitoring of slopes, especially soil-nailed slopes have limitations such as electromagnetic interference, low accuracy, poor longterm reliability and difficulty in mounting a series of strain sensors on a soil nail bar with a small-diameter. This paper presents a slope monitoring system based on fibre Bragg grating (FBG) sensing technology. This monitoring system is designed to perform long-term monitoring of slope movements, strains along soil nails, and other slope reinforcement elements. All these FBG sensors are fabricated and calibrated in laboratory and a trial of this monitoring system has been successfully conducted on a roadside slope in Hong Kong. As part of the slope stability improvement works, soil nails and a toe support soldier-pile wall were constructed. During the slope works, more than 100 FBG sensors were installed on a soil nail, a soldier pile, and an in- place inclinometer. The paper presents the layout and arrangement of the instruments as well as the installation procedures adopted. Monitoring data have been collected since March 2008. This trial has demonstrated the great potential of the optical fibre monitoring system for long-term monitoring of slope performance. The advantages of the slope monitoring system and experience gained in the field implementation are also discussed in the paper.
Radiological gastrostomy: A comparative analysis of different image-guided methods
Hong-Tao Hu,Hang Yuan,Chen-Yang Guo,Quan-Jun Yao,Xiang Geng,Hong-Tao Cheng,Jun-Li Ma,Yan Zhao,Li Jiang,Yu-Qing Zhao,Hai-Liang Li 소화기인터벤션의학회 2021 International journal of gastrointestinal interven Vol.10 No.2
Background: Radiographic guided percutaneous gastrostomy has become a safe and effective enteral nutrition method for patients who can not eat by mouth. Fluoroscopy, computed tomography (CT) and cone-beam CT have been routinely used clinically. The aim of this study was to compare the advantages and disadvantages of percutaneous gastrostomy using different radiographic guided methods. Methods: We retrospectively analyzed the clinical data of 538 patients undergoing percutaneous gastrostomy in our department. According to the image guidance method used in gastrostomy, the patients were divided into groups A by fluoroscopy guidance, group B by fluoroscopy combined with C-arm CT guidance, and group C with the whole process CT guidance. The gastrostomy success rate, complication rate, procedure time, and patient radiation dose were analyzed in the three groups. Results: Among 538 patients, 534 were successful and the success rates are 94.3%, 99.3%, and 100% in group A, B, and C, respectively (P > 0.05). There were 3 cases occurred postoperative bleeding as serious adverse events and transferred to surgical gastrostomy. The minor complications include local infection, hyperplasia of granulation tissue, tube obstruction or prolapse, and local pain of the ostomy. The minor complication rates were 10.5%, 10.4%, and 7.7% in group A, B, and C, respectively (P > 0.05). The average procedure time was 25.57 ± 5.99 minutes, 29.01 ± 6.63 minutes, and 45.47 ± 8.98 minutes, respectively (χ2 = 87.98, P < 0.001). The average radiation dosage was 27.30 ± 19.27 mGy, 145.07 ± 106.08 mGy, and 2,590.26 ± 1,088.22 mGy, respectively (χ2 = 204.44, P < 0.001). Conclusion: There were no significant differences in the success rates and complication rates of gastrostomy under the three guiding methods. For difficult cases, CT-guided gastrostomy may be a very useful supplemental method.
Electrochemical Reductive Removal of Nitrate from Water and Wastewater
Hu, Hong-Ying,Fujie, Koichi,Goto, Naohiro 영남대학교 환경문제연구소 2000 環境硏究 Vol.20 No.1
The purpose of this study is to evaluate the possibility of some zero-valent metals such as aluminum, zinc and iron as reductants to convert nitrate in water into nitrogen gas under acidic conditions. Based on the results of comparative studies on the reduction of nitrate by metallic iron, zinc and aluminum, respectively, metallic iron was selected as a reductant of nitrate in this study. The effect of pH on the reduction rate and products of nitrate was investigated with a fixed dosage of iron powder (size: 80 mesh) of 12 mol-Fe/mol-N under acidic (pH=2-5) and aerobic conditions. The reduction of nitrate by metallic iron was a pseudo-first order reaction under our experimental conditions. The reduction rate of nitrate was increased with decreasing pH of the reaction solution, arid the pseudo-first order reaction rate constants were 0.49, 0.40, 0.75 and 0.01 1/h at pH =2, 3, 4 and 5, respectively. The reduction products of nitrate were ammonia and nitrogen, and their yields were strongly affected by pH. The yields of nitrogen was 30%, 31% and 45% at pH=3, 4 and 5, respectively, but no formation of nitrogen was found at pH=2. It was also demonstrated that the indirect reduction of nitrate by hydrogen generated from the reaction between proton and metallic iron was a major mechanism for the reduction of nitrate under the experimental conditions.
Hu, Hong Bo,Yao, Shan Jing,Zhu, Zi Qiang,Hur, Byung Ki 한국화학공학회 2001 Korean Journal of Chemical Engineering Vol.18 No.3
The static and kinetic adsorption characteristics of Streamline DEAF and DEAF-Sepharose FF were studied under various operating conditions. The adsorption isotherms for the two types of adsorbents were obtained and found to fit well to a Langmuir-type expression. The adsorption kinetics of Streamline DEAF at different concentrations, temperatures, and viscosities were studied and a mathematical model including particle size distribution was developed to describe the adsorption performance of Streamline DEAE. Comparing the uptake curves of Streamline DEAF with DEAF-Sepharose FF, it could be concluded that Streamline DEAF achieves equilibrium faster to get equilibrium than DEAE-Sepharose FF, indicating that Streamline DEAF could be used in higher flow rate systems.