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Extraction of distributed parameters for multi-conductor transmission lines by the difference iteration method

The Journal of China Universities of Posts and Telecommunications 2018年第5期25卷 93-100页

作者： Yang Li Lu Guizhen School of Information Engineering Communication University of China

The distributed parameters of the transmission lines have the significant impact to the signal propagation. In the conventional method of the distributed parameter extraction,the discontinuity of inverse trigonometric or hyperbolic can arise the problem about phase ambiguity which causes significant errors for transmission models. A difference iteration method（ DIM） is proposed for extracting distributed parameters of high frequency transmission line structure in order to overcome the phase ambiguity in the conventional method（ CM）. The formulations of the proposed method are first derived for two-conductor and multi-conductor lines. Then the validation is performed for the models of micro-strip transmission line. Numerical results demonstrate that the proposed DIM can solve the problem about the phase ambiguity and the extracted distributed parameters are accurate and efficient for a wide range of the frequencies of interest and line lengths.

关键词： two-conductor transmission line multi-conductor transmission line conventional method difference iteration method distributed parameters

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A new design of groundwater sampling device and its application

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Journal of Environmental Sciences 2005年第5期17卷 838-841页

作者： Yih-Jin Tsai Ming-Ching T. Kuo Department of Environmental Resources Engineering Diwan College of ManagementDepartment of Mineral and Petroleum Engineering "National" Cheng Kung University No. 87-1 Nansh Li Madou Tainan Taiwan ChinaTainan Taiwan China

Compounds in the atmosphere contaminate samples of groundwater. An inexpensive and simple method for collecting groundwater samples is developed to prevent contamination when the background concentration of contaminants is high. This new design of groundwater sampling device involves a glass sampling bottle with a Teflon-lined valve at each end. A cleaned and dried sampling bottle was connected to a low flow-rate peristaltic pump with Teflon tubing and was filled with water. No headspace volume was remained in the sampling bottle. The sample bottle was then packed in a PVC bag to prevent the target component from infiltrating into the water sample through the valves. In this study, groundwater was sampled at six wells using both the conventional method and the improved method. The analysis of trichlorofluoromethane（ CFC-11 ） concentrations at these six wells indicates that all the groundwater samples obtained by the conventional sampling method were contaminated by CFC-11 from the atmosphere. The improved sampling method greatly eliminated the problems of contamination, preservation and quantitative analysis of natural water.

关键词： groundwater sampling improved method conventional method tritium trichlorofluoromethane(CFC-11 )

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试论战国秦汉文学研究中的惯例方法及其相关问题

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中国古代、近代文学研究 2019年第4期 130-136页

作者：徐建委

中国文学史研究中存在一些习惯性的做法，我们可以称之为“惯例方法”，这些习惯做法渗透在很多论著之中，而不为研究者所自觉，对其适用性和有效性更是缺少清醒的反思。尤其是在战国秦汉文学研究领域，这些“惯例方法”极易造成许多整... 详细信息

中国文学史研究中存在一些习惯性的做法，我们可以称之为“惯例方法”，这些习惯做法渗透在很多论著之中，而不为研究者所自觉，对其适用性和有效性更是缺少清醒的反思。尤其是在战国秦汉文学研究领域，这些“惯例方法”极易造成许多整体性问题，甚至让整个研究领域陷入底层垮塌的泥潭。这些“惯例方法”主要有：清晰年代的预设、进化和线性思维、文本内在统一性的假设、文本是作者自我表达的载体和作者全知的假定。这些方法最终使得许多战国秦汉文学的研究变成了一种虚幻的镜像学术。

关键词：战国秦汉惯例方法文本作者成书年代 Warring States to Qin-Han Dynasty conventional method text author completion date of book

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A pilot randomized control study to evaluate endoscopic resection using a ligation device for rectal carcinoid tumors

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World Journal of Gastroenterology 2006年第25期12卷 4026-4028页

作者： Hiroyuki Sakata Ryuichi Iwakiri Akifumi Ootani Seiji Tsunada Shinichi Ogata Hibiki Ootani Ryo Shimoda Kanako Yamaguchi Yasuhisa Sakata Sadahiro Amemori Kotaro Mannen Masanobu Mizuguchi Kazuma Fujimoto Department of Internal Medicine Saga Medical School Saga 849-8501Japan Department of Radiology Saga Medical School Saga 849-8501Japan

AIM： Rectal carcinoid tumors smaller than 10 mm can be resected with local excision using endoscopy. In order to remove rectal carcinoid tumors completely, we evaluated endoscopic mucosal resection with a ligation device in this pilot control randomized study. methodS： Fifteen patients were diagnosed with rectal carcinoid tumor （less than 10 mm） in our hospital from 1993 to 2002. There were 9 males and 6 females, with a mean age 61.5 years （range, 34-77 years）. The patientshad no complaints of carcinoid syndrome symptoms. Fifteen patients were randomly divided into 2 groups： 7 carcinoid tumors were treated by conventional endoscopic resection, and 8 carcinoid tumors were treated by endoscopic resection using a ligation device. RESULTS： All rectal carcinoid tumors were located at the middle to distal rectum. The size of the tumors varied from 3 mm to 10 mm and background characteristics of the patients were not different in the two groups. The rate of complete removal of carcinoid tumors using a ligation device （100%, 8/8） was significantly higher than that of conventional endoscopic resection （57.1%, 4/7）. The three patients had tumor involvement of deep margin, for which additional treatment was performed. No complications occurred during or after endoscopic resection using a ligation device. All patients in the both groups were alive during the 3-year observation period. CONCLUSION： Endoscopic resection using a ligation device is a useful and safe method for resection of small rectal carcinoid tumors.

关键词： Carcinoid Ligation mucosectomy Endoscopy Rectum conventional method

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Microbial Limit Test of Zhideke Granules

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Medicinal Plant 2021年第3期12卷 72-74页

作者： Yunjuan PANG Yushan ZHOU Jie LIANG Hui XU Jinyu WEI Dongfang HUANG Zhengyi SUN Guangxi University of Chinese Medicine Nanning 530200 China Yulin Institute for Food and Drug Control Yulin 537000 China Guangxi Zhuang Yao Pharmaceutical Engineering Technology Research Center Nanning 530200 China Ruikang Hospital Affiliated to Guangxi University of Chinese Medicine Nanning 530011 China Guangxi Superior Chinese Patent Medicine and National Medicine Development Engineering Technology Center Nanning 530200 China

[Objectives]To test the microbial limit of Zhideke granules.[methods]According to the relevant regulations on the testing of granules in Chinese Pharmacopoeia in 2015,the applicability of the methods for counting the total number of aerobic bacteria,molds and yeasts and objectionable organisms in Zhideke granules was studied.[Results]The total number of aerobic bacteria in Zhideke granules was determined by dilution plate method(1∶20,1 mL per dish),the total number of molds and yeasts was determined by conventional plate method(1∶10,1 mL per dish),and *** was detected by conventional method of TTB(1∶10 test solution,10-100 mL TSB).[Conclusions]The method was suitable for the microbial limit test of Zhideke granules.

关键词： Zhideke granule Microbial limit methodological verification Aerobic bacteria Mold Yeast Plate method conventional method E.coli

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