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An equivalent-tool theory for acoustic logging and applications

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Applied Geophysics 2011年第1期8卷 69-78,96页

作者： Su Yuan-Da Tang xiao-Ming Hei Chuang Zhuang chun-xi China University of Petroleum （East China） Qingdao 266555 China.

The influence of an acoustic logging tool on borehole guided wave propagation should be considered in the processing and inversion of the guided waves for formation acoustic property estimation. This study introduces an equivalent-tool theory that models the tool response using an elastic rod with an effective modulus and applies the theory to multipole acoustic logging for both wireline and logging while drilling （LWD） conditions. The theory can be derived by matching the tool’s acoustic impedance/conductance to that of the multipole acoustic wavefield around the tool, assuming that tool radius is small compared to wavelength. We have validated the effectiveness and accuracy of the theory using numerical modeling and its practicality using field data. In field data applications, one can calibrate the tool parameters by fitting the theoretical dispersion curve to field data without having to consider the actual tool’s structure and composition. We use a dispersion correction example to demonstrate an application of the simple theory to field data processing and the validity of the processing result.

关键词： Equivalent theory acoustic tool modeling impedance match guided wave

Successful treatment of accessory breast cancer with endocrine therapy

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2017年第1期18卷 70-75页

作者： chun-xi WANG Shu-li GUO Li-na HAN Department of General Surgery Hainan Branch of Chinese PLA General Hospital Beijing 100853 China State Key Laboratory of Intelligent Control and Decision School of Automation Beijing Institute of Teehnology Beijing 100081 China Department of Cardiovascular Internal Medicine Nanlou Branch of Chinese PLA General Hospital Beijing 100853 China

Accessory breast cancers in males are extremely rare, and only a few cases have been reported in the literature. In this paper, an 87-year-old male patient was diagnosed with an accessory breast cancer by means of computed tomography （CT）, magnetic reso- nance imaging （MRI）, positron emission tomography- computed tomography （PET-CT）, and immuno- histochemistry based on needle biopsy, and has un- dergone successful resection and postoperative ad- juvant endocrine therapy. He was the oldest male patient with an accessory breast cancer reported in the Chinese Hospital Knowledge Database and PubMed literature from 1975 to 2015.

关键词：副乳腺癌高龄男性内分泌治疗

Treatment of pig serum-induced rat liver fibrosis with Boschniakia rossica, oxymatrine and interferon-α

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World Journal of Gastroenterology 2005年第1期11卷 122-126页

作者： chun-SongWu xi-XuPiao Dong-MingPiao Yong-RiJin Cheng-HaoLi DepartmentofGastroenterology theAffiliatedHospitalMedicalCollegeYanbianUniversityYanji133000JilinProvinceChina

AIM: To investigate the effect of Boschniakia rossica (BR),oxymatrine (OM) and interferon-alpha (IFN-α) 1b on the therapy of rat liver fibrosis and its ***: By establishing a rat model of pig serum-induced liver fibrosis, liver/weight index and serum alanine transaminase (ALT) were observed to investigate the therapeutic effect of BR, OM and IFN-α. Radioimmunoassay was utilized to measure procollagen type Ⅲ (PCⅢ) and collagen type Ⅳ (CIV). RT-PCR was used to assay the expression of liver transforming growth factor- beta 1 (TGF-β1) mRNA. Immunohistochemistry of alpha-smooth muscle actin (α-SMA) and pathologic changes of liver tissues were also under ***: Serum PCⅢ and CIV in BR, OM and IFN-α groups were significantly declined compared with those in model group, and their RT-PCR revealed that TGF-β1 mRNA expression was also reduced more than that in model group. Immunohistochemistry demonstrated that α-SMA also declined more than that in model group. Serum ALT in IFN-α, control and model groups was within normal *** ALT in BR group had no significant difference from those of IFN-α, control and model groups. Serum ALT in OM group was significantly higher than those in BR, IFN-α,model, and control ***: BR, OM and IFN-α can prevent pig seruminduced liver rat fibrosis by inhibiting the activation of hepatic stellate cells and synthesizing collagen. OM has hepatotoxicity to rat liver fibrosis induced by pig serum.

关键词： Liver fibrosis Boschniakia rossica Oxymatrine Interferon-alpha

The Current Situation and Strategy of College English Translation Teaching

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Sino-US English Teaching 2015年第12期12卷 979-983页

作者： CHEN Meng-jie SHI xi-chun Changchun University Changchun China

College English translation teaching is an important part of college English teaching. It is the principal way to train translators. However, there are too many problems in the process of college English translation teaching and it is really out-dated. Therefore, it is a must to improve college English translation teaching, complete the teaching contents, improve the curriculum provision, explore positive teaching modes, intensify the training of the teachers and enhance the students translation skills, so that the colleges could provide highly-qualified translators for the society

关键词： college English translation teaching teaching mode

The Influence of English Movies on English Listening Teaching in College

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Sino-US English Teaching 2015年第11期12卷 822-826页

作者： SHI xi-chun CHEN Meng-jie Changchun University Changchun China

Listening, in language teaching, is a skill that requires active engagement. To help their students become effective listeners becomes one of the great challenging tasks for the language teachers. In the Chinese contexts, this challenge is greater for college English teachers, for listening skills, an important part of communication skills, have not been given as much attention as reading or writing skills in teaching non-English majors, especially a decade ago. This paper introduces English movies on English listening teaching in college, and puts forward some application strategies of English movies in English listening teaching.

关键词： English movies English learning listening

Polysiloxane with Pendant Benzo Crown Ether via a Spacer of Undecyloxymethyl as Stationary Phase for Capillary Chromatography

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Chemical Research in Chinese Universities 1994年第2期10卷 163-166页

作者： LU Xue-ran ZHANG Li-feng ZHOU xi-chun WU Cai-ying and CHEN Yuan-yin(Department of Chemistry, Wuhan University, Wuhan, 430072)

ＰｏｌｙｓｉｌｏｘａｎｅｗｉｔｈＰｅｎｄａｎｔＢｅｎｚｏＣｒｏｗｎＥｔｈｅｒｖｉａａＳｐａｃｅｒｏｆＵｎｄｅｃｙｌｏｘｙｍｅｔｈｙｌａｓＳｔａｔｉｏｎａｒｙＰｈａｓｅｆｏｒＣａｐｉｌｌａｒｙＣｈｒｏｍａｔｏｇｒａｐｈ... 详细信息

ＰｏｌｙｓｉｌｏｘａｎｅｗｉｔｈＰｅｎｄａｎｔＢｅｎｚｏＣｒｏｗｎＥｔｈｅｒｖｉａａＳｐａｃｅｒｏｆＵｎｄｅｃｙｌｏｘｙｍｅｔｈｙｌａｓＳｔａｔｉｏｎａｒｙＰｈａｓｅｆｏｒＣａｐｉｌｌａｒｙＣｈｒｏｍａｔｏｇｒａｐｈｙＬＵＸｕｅ－ｒａｎ；ＺＨＡＮＧＬ...

关键词： Polysiloxane Undecyloxy methyl spacer Crown ether

Surgical mortality in patients with malignant obstructive jaundice: a multivariate discriminant analysis

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Hepatobiliary & Pancreatic Diseases International 2003年第3期2卷 435-440页

作者： xi-chun Han Jin-Long Li Gang Han the Department of Surgery, Second Hospital, Jilin University, Changchun 130041, China Department of Surgery Second Hospital Jilin University Changchun 130041 China. hanchun601@***

OBJECTIVE: To estimate the operative mortality in patients with malignant obstructive jaundice. METHODS: Twelve risk factors were analyzed using multivariate discriminant analysis in 90 patients who had been operated on. RESULTS: Operative mortality was significantly related to the following factors: age, duration of jaundice, packed RBC volume, white blood cell count and concentration of blood urine nitrogen; it was not significantly related to diseases and types of operation. The following formula was obtained: packed RBC volume×0.09954-age×0. 04018-blood urine nitrogen×0. 23693-duration of jaundice× 2. 07388-WBC count×0. 21118+5. 26593. With this formula, an operative mortality of 77. 8% was predicted. CONCLUSION: With a positive value from the formula, the patient should be operated on; otherwise non-operative treatment is advocated.

关键词： malignant obstructive jaundice postoperative mortality multivariate discriminant analysis

The Misunderstandings and Teaching Strategies on English Grammar Learning in College

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Sino-US English Teaching 2015年第10期12卷 791-794页

作者： SHI xi-chun CHEN Meng-jie Changchun University Changchun China

English grammar teaching in college is a very challenging task, because teachers must not only consider the increase of students＇ communicative competence, but also take care of their grammar knowledge learning in the teaching process. This paper puts forward three teaching countermeasures based on the English grammar learning misunderstanding of college students, namely strengthen the grammar study of psychological counseling, strengthen guidance for English grammar learning method, and choose the teaching method of combination of explicit grammar and implicit grammar teaching.

关键词： college English grammar misunderstanding

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橡胶坝对西安灞河河道湿地旱柳群落的影响

水生态学杂志 2019年第4期40卷 42-47页

作者：杜喜春西安文理学院生物与环境工程学院

分析探讨灞河河道湿地部分区段旱柳大量死亡的问题,提出解决方法及对策,指导橡胶坝的运行及管理。调查区段为西安灞河下游A橡胶坝(浐灞河汇合处)至B橡胶坝(灞河南三环大桥)。该区段中游频繁受到水淹,旱柳死亡严重;上游临近B坝受水淹较少... 详细信息

分析探讨灞河河道湿地部分区段旱柳大量死亡的问题,提出解决方法及对策,指导橡胶坝的运行及管理。调查区段为西安灞河下游A橡胶坝(浐灞河汇合处)至B橡胶坝(灞河南三环大桥)。该区段中游频繁受到水淹,旱柳死亡严重;上游临近B坝受水淹较少,旱柳长势良好。对这2处长势差异较大的旱柳群落的胸径等级结构、倒伏、树皮开裂以及生存状况进行了比较和分析。结果表明旱柳倒伏、树皮开裂以及死亡状况差异显著;倒伏与旱柳树皮开裂、死亡均正相关;树皮开裂个体数与柳树存活个体数呈显著的负相关。倒伏和树皮开裂是旱柳死亡的直接原因,采取降低橡胶坝水位、减少蓄排水频率和减缓蓄排水速度的措施能够形成较为稳定的河流湿地生态系统,可减少旱柳死亡。

关键词：旱柳倒伏树皮开裂死亡橡胶坝西安浐灞生态区