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Neuroanatomy and clinical analysis of the cervical sympathetic trunk and longus colli 被引量:4
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作者 Zhaoyang Yin Jian Yin +2 位作者 Jun Cai Tao Sui Xiaojian Cao 《The Journal of Biomedical Research》 CAS CSCD 2015年第6期501-507,共7页
Anterior cervical surgery is commonly used for cervical vertebral body lesions. However, the structure of blood vessels and nerve tissues along the route of anterior cervical surgery is complex. We aimed to measure th... Anterior cervical surgery is commonly used for cervical vertebral body lesions. However, the structure of blood vessels and nerve tissues along the route of anterior cervical surgery is complex. We aimed to measure the data of the longus colli, the sympathetic trunk and the cervical sympathetic trunk (CST) ganglia in Chinese cadaver speci- mens. A total of 32 adult cadavers were studied. We delineated the surgical anatomy of the CST. The superior and inferior/cervicothoracic ganglia of the sympathetic trunk consistently appeared. The middle ganglion was observed in 28.1% of the specimens and there were 2 cases of unilateral double middle cervical ganglia. The inferior ganglion was observed in 25.0% of the specimens and the cervicothoracic ganglion was observed in the remaining speci- mens. The distance between the CST gradually decreased from the top to the bottom, and the distance between the medial edges of the longus colli gradually broadened from the top down. The average angle between the bilat- eral CST and the midline of the vertebra was 11.2°± 1.8° on the left side and 10.3°± 1.4° on the right side. The average angle between the medial margins of longus colli of both sides was 11.1°± 1.9°. The CST is at high risk when LC muscle is cut transversely or is dragged heavily, especially at the levels of C6 and C7. Awareness of the regional anatomy of the CST could help surgeons to identify and preserve it during anterior cervical surgeries. 展开更多
关键词 cervical sympathetic trunk GANGLION Homer syndrome longus colli spinal surgery
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Continuous Emission Spectrum Measurement for Electron Temperature Determination in Low-Temperature Collisional Plasmas
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作者 刘秋艳 李弘 +2 位作者 陈志鹏 谢锦林 刘万东 《Plasma Science and Technology》 SCIE EI CAS CSCD 2011年第4期451-457,共7页
Continuous emission spectrum measurement is applied for the inconvenient diagnos- tics of low-temperature collisional plasmas. According to the physical mechanism of continuous emission, a simplified model is presente... Continuous emission spectrum measurement is applied for the inconvenient diagnos- tics of low-temperature collisional plasmas. According to the physical mechanism of continuous emission, a simplified model is presented to analyze the spectrum in low temperature plasma. The validity of this model is discussed in a wide range of discharge parameters, including electron tem- perature and ionization degree. Through the simplified model, the continuous emission spectrum in a collisional argon internal inductively coupled plasma is experimentally measured to determine the electron temperature distribution for different gas pressures and radio-frequency powers. The inverse Abel transform is also applied for a better spatially resoluted results. Meanwhile, the result of the continuous emission spectrum measurement is compared to that of the electrostatic double probes, which indicates the effectiveness of this method. 展开更多
关键词 continuous emission spectrum DIAGNOSTICS low-temperature plasma colli- sional plasma
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Fibromatosis Colli in Bamako: An Entity to Know in Infants
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作者 Ousmane Troare Ousmane Bagayoko +3 位作者 W. Ousmane Diallo Moise Dakouo Daniel Wapa Dembele Adama Diaman Keita 《Open Journal of Medical Imaging》 2022年第3期103-108,共6页
Introduction: Fibromatosis colli is a congenital muscle tumor with an incidence of 0.4%. This lesion is fibrous involving the sternocleidomastoid muscle, discovered after a few weeks of life in a patient who had known... Introduction: Fibromatosis colli is a congenital muscle tumor with an incidence of 0.4%. This lesion is fibrous involving the sternocleidomastoid muscle, discovered after a few weeks of life in a patient who had known or unknown perinatal trauma. Rarely bilateral, it evolves spontaneously favorably in a few weeks or months in the vast majority of cases. Objectives: The purpose of this work is to bring the interest in ultrasound in the management of fibromatosis colli. Material and Methods: This is a descriptive cross-sectional study covering a period of 21 months from December 2019 to December 2021 in the medical imaging department of the medical clinic “Marie Cuire” in Bamako. The variables analyzed were age, sex and ultrasound results. The ultrasound system used was General Electric (GE). Data analysis was performed using Excel software. Results: During the 21-month study period, 1260 infants were seen in our service, including 0.95% for cervical swelling. We had a male predominance with 8 cases out of 12 cases and the age of the patients was mainly between 21 days and 30 days. The diagnosis was made by ultrasound, which revealed within the Sterno-cleido-mastoid muscle (MSCM) a hypo-isoechoic or heterogeneous oblong mass or thickening without any other associated anomaly. Conclusion: Cervical ultrasound is a significant examination in the management of fibromatosis colli for diagnostic confirmation and therapeutic follow-up. 展开更多
关键词 Cervical Ultrasound INFANT Fibromatosis colli Medical Clinic “Marie Curie”
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高速铁路微膨胀泥岩破碎土非饱和渗透特性研究
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作者 余云燕 丁小刚 +2 位作者 薛彦瑾 罗崇亮 李永鹏 《中国铁道科学》 EI CAS CSCD 北大核心 2024年第1期1-11,共11页
非饱和渗透系数是非饱和膨胀泥岩土体渗流分析及水-力耦合研究的基础,对工程建设和工程病害预防具有重要意义。以新疆哈密地区微膨胀泥岩破碎土为例,制备4种不同初始干密度重塑土样,采用压力板法和滤纸法试验测量其土-水特征曲线,采用... 非饱和渗透系数是非饱和膨胀泥岩土体渗流分析及水-力耦合研究的基础,对工程建设和工程病害预防具有重要意义。以新疆哈密地区微膨胀泥岩破碎土为例,制备4种不同初始干密度重塑土样,采用压力板法和滤纸法试验测量其土-水特征曲线,采用变水头试验测量土样饱和渗透系数;通过自主研制的土柱渗流试验装置进行恒定体积条件下一维土柱入渗试验,探究湿润锋前进法和瞬态剖面法的适用性,以获得不同初始干密度土体的非饱和渗透性曲线,并结合试验值对Childs和Collis-Geroge (CCG)渗透系数预测模型进行修正。结果表明:新疆哈密微膨胀泥岩破碎土的基质吸力范围为1~10^(5)kPa,渗透系数范围为10^(-9)~10^(-4)cm·s^(-1);试验土样初始干密度越大,大孔隙占比越小,阻渗作用越明显;CCG渗透系数预测模型可较好地反映土体渗透性曲线发展趋势,但在量值上随吸力的增加逐渐“远离”土体实测渗透性曲线;修正后的CCG渗透系数预测模型可反映不同初始干密度下土体渗透性曲线的发展规律。 展开更多
关键词 高速铁路 膨胀泥岩 瞬态剖面法 土-水特征曲线 渗透系数 CCG渗透系数预测模型
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基于Go+Colly+Fyne开发跨平台图片爬虫
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作者 朱先忠 《电脑编程技巧与维护》 2024年第7期133-137,共5页
爬虫技术是大数据时代获取精准市场数据的关键技术之一,有助于降低企业成本和提高运营效率。Fyne是github.com平台上基于Go语言跨平台交互图形界面开发的首选框架。Colly是一个基于Go语言的快速高效的开源Web爬虫框架,支持异步处理、分... 爬虫技术是大数据时代获取精准市场数据的关键技术之一,有助于降低企业成本和提高运营效率。Fyne是github.com平台上基于Go语言跨平台交互图形界面开发的首选框架。Colly是一个基于Go语言的快速高效的开源Web爬虫框架,支持异步处理、分布式爬取等功能,成为Go语言领域首选的爬虫框架。研究将探讨两框架联合共同开发爬虫程序的关键技术,并给出相应案例。 展开更多
关键词 网络爬虫 Go语言 Colly框架 Fyne框架 GUI框架
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亦师亦友 Border Collie边境牧羊犬
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作者 思维 《宠物世界》 2015年第9期54-57,共4页
很难从诸多犬种中找到能与边境牧羊犬的智商和服从度比拟的狗狗了,它不单是人类在工作中的伙伴,甚至教会了我们如何与其他生命和谐相处的道理。
关键词 边境牧羊犬 BORDER collie 细小病毒 牧场上 运动过度 发育不全 遗传疾病 粗毛 免疫疫苗 中等长度
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以智慧倾倒众生 苏格兰牧羊犬 Rough Collie
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作者 思维 《宠物世界》 2015年第7期54-57,共4页
苏格兰北部地区终年寒冷的气候,令源自此地的苏格兰牧羊犬拥有吃苦耐劳的特质,而且性格温和气质优雅。无论作为曾经的工作犬还是如今的伴侣犬。均是出色犬种。
关键词 苏格兰牧羊犬 ROUGH collie 公犬 母犬 伴侣犬 柯利犬 性格温和 北部地区 小型犬 关节疾病
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ANFIBI E RETTILI DEL PARCO REGIONALE DEI COLLI DI BERGAMO
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作者 GIOVANNI GIOVINE 《Natural Disaster Reduction in China》 1992年第1期375-387,共13页
In questo lavoro viene studiata l’erpetofauna del Parco Regionale dei Colli di Bergamo,che risulta composta da 10 specie di Anfibi e 9 di Rettili. Le specie presenti sono quelle the si potrebberorilevare in zone anal... In questo lavoro viene studiata l’erpetofauna del Parco Regionale dei Colli di Bergamo,che risulta composta da 10 specie di Anfibi e 9 di Rettili. Le specie presenti sono quelle the si potrebberorilevare in zone analoghe; tra queste spiccano Bombina variegata, ormai tara in Lombardia, e Ranalatastei. L’Autore ha analizzato le categorie corologiche notando una certa preponderanza delle specieEuropee (68%), su quelle Eurocentroasiatiche (22%) e su quelle italiche (10%). Lo studio delle microco-muuità ha messo in evidenza 3 modelli fondamentali: la m. del bosco submediterraneo (con prevalenzadi Rettili), la m. degli ambienti umidi (con prevalenza di Anfibi) e la m. dei boschi umidi (specie tipicaSalamandra salamandra). Amphibians and reptiles of the Parco Regionale dei Colli di Bergamo. This article consi-ders the herpetofauna of the Parco Regionale dei Colli di Bergamo that is composed of ten speciesof Amphibians and nine of Reptiles. The species are those one would expect to find in a similar landsca-pe. Among these is relevant to mention Bombina variegata, now rare in Lombardy, and Rana latastei.The Author analyzes the corological categories noting a certain predominance of the European species(68%) on the Eurocentroasiatic (22%) and the Italic (10%) ones. The study of the microcommunitieshas evidenced three fundamental models: the m. of the submediterranean wood (with prevalence of Repti-les), the m. of the umid environments (with prevalence of Amphibians) and the m. of the damp woods(with the typical species Salamandra salamandra). 展开更多
关键词 DEI CO BI ANFIBI E RETTILI DEL PARCO REGIONALE DEI colli DI BERGAMO PI
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边境牧羊犬(Border Collie)
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作者 张建华 何平 《养犬》 2007年第2期14-14,35,共2页
边境牧羊犬又名边境柯利,是一种非常聪明的犬种,主要分布在四个国家,英国、美国、澳大利亚和新西兰。边境牧羊犬是非常匀称的、中等体型的、外观健壮的狗。显示出来的优雅和敏捷与体质及精力相称。他的身躯坚实。
关键词 边境牧羊犬 BORDER collie 肌肉发达 德国牧羊犬 贵妇犬 动作敏捷 前躯 兰色 黑色带 背线
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A Novel Meta-Heuristic Optimization Algorithm in White Blood Cells Classification
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作者 Khaled A.Fathy Humam K.Yaseen +1 位作者 Mohammad T.Abou-Kreisha Kamal A.ElDahshan 《Computers, Materials & Continua》 SCIE EI 2023年第4期1527-1545,共19页
Some human diseases are recognized through of each type of White Blood Cell(WBC)count,so detecting and classifying each type is important for human healthcare.The main aim of this paper is to propose a computer-aided ... Some human diseases are recognized through of each type of White Blood Cell(WBC)count,so detecting and classifying each type is important for human healthcare.The main aim of this paper is to propose a computer-aided WBCs utility analysis tool designed,developed,and evaluated to classify WBCs into five types namely neutrophils,eosinophils,lymphocytes,monocytes,and basophils.Using a computer-artificial model reduces resource and time consumption.Various pre-trained deep learning models have been used to extract features,including AlexNet,Visual Geometry Group(VGG),Residual Network(ResNet),which belong to different taxonomy types of deep learning architectures.Also,Binary Border Collie Optimization(BBCO)is introduced as an updated version of Border Collie Optimization(BCO)for feature reduction based on maximizing classification accuracy.The proposed computer aid diagnosis tool merges transfer deep learning ResNet101,BBCO feature reduction,and Support Vector Machine(SVM)classifier to forma hybridmodelResNet101-BBCO-SVM an accurate and fast model for classifying WBCs.As a result,the ResNet101-BBCO-SVM scores the best accuracy at 99.21%,compared to recent studies in the benchmark.The model showed that the addition of the BBCO algorithm increased the detection accuracy,and at the same time,decreased the classification time consumption.The effectiveness of the ResNet101-BBCO-SVM model has been demonstrated and beaten in reasonable ratios in recent literary studies and end-to-end transfer learning of pre-trained models. 展开更多
关键词 White blood cells deep learning machine learning data mining OPTIMIZATION border collie optimization
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宠物犬原发性骨肉瘤中西医结合诊治
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作者 孙甲川 朱永军 +1 位作者 李玩生 张文泉 《现代畜牧科技》 2023年第9期93-96,共4页
1只7岁雄性未绝育柯利犬,突然出现左侧后肢走路跛行的情况,表现疼痛。从发现到就诊3个月以来病发迅速,现因患宠后肢肿胀严重,行走困难,精神食欲减退,遂来就诊。通过临床检查、后肢FNA检查,血液学、影像学检查、组织病理学检查方法对该... 1只7岁雄性未绝育柯利犬,突然出现左侧后肢走路跛行的情况,表现疼痛。从发现到就诊3个月以来病发迅速,现因患宠后肢肿胀严重,行走困难,精神食欲减退,遂来就诊。通过临床检查、后肢FNA检查,血液学、影像学检查、组织病理学检查方法对该病例进行初步筛查诊断,并根据诊断结果进行治疗。结果表明,确定该病例为原发性骨肉瘤,原发部位为左侧后肢患处的干骺端,并在肺部出现转移病灶。采取外科截肢手术治疗,切除左侧股骨头及以下部位,并辅助全身化疗,治疗后患犬恢复良好,1年内未见复发。该研究结果既可为犬原发性骨肉瘤的确诊提供可靠的诊断方法,又可为临床病例提供可行的治疗方案。 展开更多
关键词 柯利犬 骨肉瘤 血液血凝 影像学检查 淋巴细胞减少症 全身化疗
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Acute neck tendonitis with dyspnea:A case report
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作者 Hao Wu Wen Liu +1 位作者 Lei Mi Qi Liu 《World Journal of Clinical Cases》 SCIE 2023年第18期4419-4424,共6页
BACKGROUND Longus colli tendinitis(LCT)with dyspnea is a relatively less-reported condition in the literature,and physicians should be aware of its existence.Misdiagnosis of this condition may cause unnecessary treatm... BACKGROUND Longus colli tendinitis(LCT)with dyspnea is a relatively less-reported condition in the literature,and physicians should be aware of its existence.Misdiagnosis of this condition may cause unnecessary treatment for dyspnea.CASE SUMMARY Herein,we report the case of a 40-year-old man with acute neck tendonitis.The patient presented to the pneumology department clinic with a complaint of acute neck tendonitis with dyspnea.An emergency cervical magnetic resonance examination was performed,and the preliminary diagnosis was“acute longus cervicalis tendinitis.”After aggressive medical treatment,the symptoms obviously improved.CONCLUSION LCT is a self-limiting disease that usually improves after three to seven days of conservative treatment following a definite diagnosis.However,owing to its insidious onset and complex clinical manifestations,most relevant personnel are not fully understood.The definite diagnosis of LCT is based on a comprehensive understanding of the triad,rare symptoms,and the clear identification of cervical 1 and 2 levels calcification and prevertebral edema by medical imaging examination,especially magnetic resonance imaging and computed tomography. 展开更多
关键词 Longus colli tendonitis DYSPNEA Nimesulide dispersible tablets Prednisolone acetate tablets Treatment Case report
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颈长肌血管来源与分布及临床意义
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作者 章书豪 陈衍 +5 位作者 厉浩斌 洪伟军 俞浩楠 张海琴 杨新东 王向阳 《中国脊柱脊髓杂志》 CAS CSCD 北大核心 2023年第7期639-643,共5页
目的:分析颈长肌(longus colli,LCo)血管的来源及其在肌肉中的分布并探讨其临床意义。方法:成人防腐尸体标本12具(8男,4女),在标本上进行解剖学研究。通过乳胶灌注显影血管,记录LCo血管来源,各分支血管在LCo的入肌点、走行、终点。分别... 目的:分析颈长肌(longus colli,LCo)血管的来源及其在肌肉中的分布并探讨其临床意义。方法:成人防腐尸体标本12具(8男,4女),在标本上进行解剖学研究。通过乳胶灌注显影血管,记录LCo血管来源,各分支血管在LCo的入肌点、走行、终点。分别测量入肌点、终点距离同侧同水平LCo内侧缘的直线长度,并记录相对应的椎体或者椎间盘节段,分析其临床意义。结果:根据血管与LCo的解剖位置关系,分为:(1)LCo上表面血管(上、中、下支),主要来源于甲状腺下动脉、甲状颈干等血管。上支入肌点分布在C6~C7椎体距离LCo内侧缘16.80±9.87mm处,斜向内上方走行,止于C5~C6距离LCo内侧缘11.75±8.93mm处。中支入肌点分布在C6~T1距离LCo内侧缘16.62±5.96mm处,斜向内上方走行,偶有分叉,在C4~C7椎体,66.7%止于LCo内侧缘,33.3%止于距离LCo内侧缘7.87±4.27mm处。下支入肌点分布在C6~T2,距离LCo内侧缘15.65±4.47mm处。发出1~4个分支,成网状结构止于C6~T3的LCo内侧或向下进入心包外脂肪组织形成血管网;(2)LCo肌肉内走行血管,为上表面血管入肌后的延续,属肌肉营养血管,或向下穿行肌肉深部,进入椎体;(3)LCo下表面血管,分布于肌肉下表面与椎体之间。C5、C6的血管来源于椎动脉和甲状腺下动脉,C7和T1来源于颈深动脉。血管扭曲走行,形成血管簇进入椎体,从C3~T1不同椎体平面到LCo内侧缘距离分别为:1.85~4.60mm、1.89~2.61mm、2.60~7.27mm、1.19~7.95mm、2.06~8.61mm及2.47~8.08mm。结论:LCo血管分布具有规律性,表面血管形成上、中、下三支,深部血管多止于椎体上1/3两侧滋养孔。颈椎前路手术中,避免剥离椎体上部或上终板下方的LCo,可减少出血和术后颈部血肿的发生概率。 展开更多
关键词 颈长肌 颈椎前路手术 血管来源
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干密度对黄土渗透系数的影响 被引量:9
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作者 马亚维 谌文武 +2 位作者 毕骏 郭桂红 焦贵德 《岩土工程学报》 EI CAS CSCD 北大核心 2018年第S1期165-170,共6页
非饱和渗透系数是研究非饱和土入渗规律的重要参数,同时也是研究边坡失稳和地基浸湿变形的重要基础。本文采用变水头法测量原状黄土和重塑黄土饱和渗透系数,基于Childs&Collis-Geroge模型,结合土水特征曲线和饱和渗透系数,详细探讨... 非饱和渗透系数是研究非饱和土入渗规律的重要参数,同时也是研究边坡失稳和地基浸湿变形的重要基础。本文采用变水头法测量原状黄土和重塑黄土饱和渗透系数,基于Childs&Collis-Geroge模型,结合土水特征曲线和饱和渗透系数,详细探讨了原状黄土、不同干密度非饱和重塑黄土体积含水率与渗透系数的关系和规律。结果表明,原状黄土的饱和渗透系数远小于重塑样,重塑土样饱和渗透系数随着干密度的增大而减小;黄土非饱和渗透系数减小趋势随着干密度增大而减小,但在残余含水率附近,不同干密度下试样的渗透性基本相同。 展开更多
关键词 非饱和土 渗透系数 Childs & collis-Geroge模型 干密度 体积含水率
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Mie散射激光雷达探测大气气溶胶的进展 被引量:45
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作者 夏俊荣 张镭 《干旱气象》 2006年第4期68-72,81,共6页
简要论述了激光雷达探测大气的优点,以及求解M ie散射激光雷达方程的理论方法,并阐述了国内外近20 a来M ie散射激光雷达探测大气气溶胶的主要成果,及其存在的问题。
关键词 激光雷达 大气探测 collis斜率法 Femald方法 Klett方法
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成骨细胞和Ⅰ型胶原 被引量:6
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作者 王海彬 何伟 袁浩 《中国中医骨伤科杂志》 CAS 2003年第3期56-59,共4页
关键词 成骨细胞 Ⅰ型胶原 研究进展 软骨 colli
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先天性食管裂孔疝外科治疗
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作者 吴强 林金廷 +1 位作者 郭祥云 陈建晖 《福建医学院学报》 1996年第4期377-377,共1页
先天性食管裂孔疝外科治疗吴强,林金廷,郭祥云,陈建晖关键词食管裂孔疝,先天性,诊断,Collis术先天性食管裂孔疝是指先天性部分胃经隔肌的食管裂孔突入胸腔。少数病例可经内科治愈,们多数需外村手术治疗[1]。本院198... 先天性食管裂孔疝外科治疗吴强,林金廷,郭祥云,陈建晖关键词食管裂孔疝,先天性,诊断,Collis术先天性食管裂孔疝是指先天性部分胃经隔肌的食管裂孔突入胸腔。少数病例可经内科治愈,们多数需外村手术治疗[1]。本院1986年8月~1994年9月共手术治疗... 展开更多
关键词 食管 裂孔疝 先天性 诊断 collis术 X线
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盐渍土土壤溶液1.43 GHz复介电常数计算模型的构建与检验 被引量:2
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作者 宫燕 刘宝江 宋开山 《土壤与作物》 2020年第1期83-93,共11页
土壤中的可溶性盐离子是限制作物生长的因素之一,土壤复介电常数是测定土壤可溶性盐的一个重要指标。本文利用谐振腔技术,测量了4种电解质水溶液的介电常数,给出了25℃时Na^+、Cl^-、SO2-4、CO2-3和HCO-35种离子的复影响因子。利用各离... 土壤中的可溶性盐离子是限制作物生长的因素之一,土壤复介电常数是测定土壤可溶性盐的一个重要指标。本文利用谐振腔技术,测量了4种电解质水溶液的介电常数,给出了25℃时Na^+、Cl^-、SO2-4、CO2-3和HCO-35种离子的复影响因子。利用各离子的复影响因子,可以将计算溶液介电常数实部的Collie介电模型直接用于计算土壤溶液的复介电常数。为了检验模型的准确性,本文还模拟配制了氯化物型、硫酸盐型和苏打型共41种多离子的土壤溶液,并用单一的电解质NaCl、Na2SO4和NaHCO3水溶液的影响因子来分别替代复杂的氯化物型、硫酸盐型和苏打型盐渍土土壤溶液的复合影响因子。将改进后的Collie介电模型计算介电常数值与模拟配制的41种土壤溶液的测量结果进行相关性分析t检验,其P均为0.85以上(大于0.05),无显著性差异,两组数据获得了很好的一致性。因此,本研究结果对于建立微波遥感监测盐渍土壤和盐湖水体的盐度的介电模型奠定了坚实的物理基础和实用基础。 展开更多
关键词 盐渍土土壤溶液 介电常数 collie介电模型 离子的复影响因子
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论碰撞造山带的分类 被引量:42
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作者 李继亮 孙枢 +3 位作者 郝杰 陈海泓 侯泉林 肖文交 《地质科学》 CAS CSCD 北大核心 1999年第2期129-138,共10页
近年来碰撞造山带研究取得了很大进展,为碰撞造山带分类奠定了基础。1992年,Sengor提出了一个三分法的分类。但是,这个分类不能涵盖所有的碰撞造山带,同时其内部还有重叠。本文主要依据参与碰撞的单元,即板块、微板块、... 近年来碰撞造山带研究取得了很大进展,为碰撞造山带分类奠定了基础。1992年,Sengor提出了一个三分法的分类。但是,这个分类不能涵盖所有的碰撞造山带,同时其内部还有重叠。本文主要依据参与碰撞的单元,即板块、微板块、前缘弧、残留弧和增生弧,提出一个新的分类方案,即将碰撞造山带分为陆-陆,陆-前缘弧,陆-残留弧,陆-增生弧,弧-弧,陆-弧-陆6种类型。从世界各地的碰撞造山带来看,陆-陆碰撞型是很少见的,也就是说,威尔逊旋回不论在现代还是古代地质历史上都是罕有发生的,而大多数碰撞造山带都是非威尔逊旋回型的。 展开更多
关键词 碰撞造山带 非威尔逊旋回 碰撞单元 分类
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古亚洲洋和古特提斯洋的闭合时代--论二叠纪末生物灭绝事件的构造起因 被引量:51
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作者 李朋武 高锐 +1 位作者 管烨 李秋生 《吉林大学学报(地球科学版)》 EI CAS CSCD 北大核心 2009年第3期521-527,共7页
通过对比分析华南地块和基墨里大陆(包括保山、缅泰和羌塘地块)间、华北和西伯利亚地块间的古纬度和纬度运移量,分别确定了古特提斯洋和古亚洲洋的闭合时代。结果表明:(1)基墨里大陆东部的保山地块与华南地块于晚二叠世碰撞,然... 通过对比分析华南地块和基墨里大陆(包括保山、缅泰和羌塘地块)间、华北和西伯利亚地块间的古纬度和纬度运移量,分别确定了古特提斯洋和古亚洲洋的闭合时代。结果表明:(1)基墨里大陆东部的保山地块与华南地块于晚二叠世碰撞,然后继续和华南地块、缅泰地块、羌塘地块一起向北漂移,直到晚三叠世,即在云南三江地区,古特提斯洋的闭合时代为晚二叠世晚期;(2)早二叠世西伯利亚地块开始快速向南漂移,并于二叠纪末期(~250Ma)和华北地块发生碰撞,即位于两地块间古亚洲洋最终闭合时代为二叠纪末;(3)峨眉山和西伯利亚两个大火成岩省的形成时代和大洋的闭合时代吻合,而大火成岩省在时间上又与全球生物灭绝事件吻合,进而推断二叠纪末的生物灭绝事件可能与古亚洲洋和古特提斯洋的闭合密切相关。 展开更多
关键词 集群灭绝 古地磁 古亚洲洋 古特提斯洋 大陆碰撞
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