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When horsetails became giants

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Chinese Science Bulletin 2012年第18期57卷 2285-2288页

作者： FENG Zhuo ZIEroLD Thofid roβLER ronny Museum fur Naturkunde ChemnitzMoritzstraβe 2009111Germany Yunnan Key Laboratory for Palaeobiology Yunnan UniversityKunming 650091China

Horsetails arose in the Late Devonian,evolved a greater diversity and forming fast growing bamboo-like thickets in the Carboniferous lowland swamp forest ***,the diversity of this group drastically declined during the Permian while the climate became more dynamic and *** only a single surviving genus exists,the herbaceous *** we report an exceptional large horsetail tree from the Early Permian Petrified Forest of *** fossil horsetail tree is assigned to Arthropitys bistriata (Cotta) *** is 15 m high and over 25 cm in diameter,with thick wood and at least 3 orders of woody branching system formed a big canopy,and is morphologically very comparable with the living woody higher *** suggests that the plasticity mechanism of Permian calamitaleans enabled novel growth strategies when they competed with the rising gymnosperms during the environmental changes.

关键词：木贼森林生态系统巨人早二叠世分支系统植物形态裸子植物环境变化

Carcinoma in situ arising in a tubulovillous adenoma of the distal common bile duct: A case report

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World Journal of Gastroenterology 2008年第29期14卷 4705-4708页

作者： Bum-Soo Kim Sun-Hyung Joo Kwang-ro Joo Department of Surgery East-West Neo Medical Center University of KyungHee College of Medicine149 Sangil-dong Gangdong-gu Seoul 134-727 Korea Department of Internal Medicine East-West Neo Medical Center University of KyungHee College of Medicine149 Sangil-dong Gangdong-gu Seoul 134-727 Korea

Tubulovillous adenomas are common in the colon and rectum, but are rare in the common bile duct. Biliary adenomas may produce obstructive jaundice, which can be easily confused with a malignant neoplasm or stone. We report a case of a carcinoma in situ arising in a tubulovillous adenoma of the distal common bile duct causing obstructive jaundice. A 55-year-old male presented with a 10-d history of pruritus and progressive jaundice. Abdominal sonography and computed tomography showed a mass in the distal common bile duct. Endoscopic retrograde cholangiopancreatography showed luminal narrowing of the bile duct due to a polypoid mass. Positron emission tomography demonstrated no abnormal uptake. It was thought that this mass was a malignant tumor, thus a pylorus-preserving panceaticoduodenectomy was performed. The final pathology showed a tubulovillous adenoma with carcinoma in situ of the distal common bile duct. At follow-up 8 mo later, endoscopy showed multiple polyps in the rectum, colon and stomach. The polyps were removed by endoscopic mucosal resection and shown to be tubular adenomas with high grade dysplasia. Biliary adenomas require careful follow-up for early detection of recurrence and malignant transformation.

关键词： Common bile duct Adenoma Carcinomain situ

Church road站上味蕾巅峰的“鼎之路”

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商业周刊（中文版） 2024年第1期 88-88页

作者： J.ro 不详

所有的一切追溯至一个源头,1897年,在新西兰霍克斯湾(Hawke's Bay)5英亩的葡萄园为起始。超过一个世纪以来,虔途酒庄以匠心和年复一年的全情投人,成就了一代代传奇酿酒大师,同时也酿造出获奖众多的佳酿。时至今日,虔途酒庄成为备受赞誉... 详细信息

所有的一切追溯至一个源头,1897年,在新西兰霍克斯湾(Hawke's Bay)5英亩的葡萄园为起始。超过一个世纪以来,虔途酒庄以匠心和年复一年的全情投人,成就了一代代传奇酿酒大师,同时也酿造出获奖众多的佳酿。时至今日,虔途酒庄成为备受赞誉的酒庄,以远见、信念和酿造艺术开创了品牌的问鼎之路。

关键词：酒庄霍克斯葡萄园新西兰

A Method for Detecting Non-Mask Wearers Based on Regression Analysis

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Computers, Materials & Continua 2022年第9期72卷 4411-4431页

作者： Dokyung Hwang Hyeonmin ro Naejoung Kwak Jinsang Hwang Dongju Kim POSTECH Institute of Artificial Intelligence Pohang24257Korea Department of Information Security at Pai Chai University Daejeon35345Korea Department of Safety and Emergency Management at Kyungwoon University Gumi39160Korea

A novel practical and universal method of mask-wearing detection has been proposed to prevent viral respiratory *** proposed method quickly and accurately detects mask and facial regions using welltrained You Only Look Once(YOLO)detector,then applies image coordinates of the detected bounding box(bbox).First,the data that is used to train our model is collected under various circumstances such as light disturbances,distances,time variations,and different climate *** also contains various mask types to detect in general and universal application of the *** detect mask-wearing status,it is important to detect facial and mask region accurately and we created our own dataset by taking picture of ***,the Convolutional Neural Network(CNN)model is trained with both our own dataset and open dataset to detect under heavy foot-traffic(Indoors).To make the model robust and reliable in various environment and situations,we collected various sample data in different *** through the experiment,we found out that there is a particular gradient according to the mask-wearing *** proposed method searches the point where the distance between the gradient for each state and the coordinate information of the detected object is the *** it carry out the classification of mask-wearing status of detected ***,we defined and classified three different mask-wearing states according to the mask’s position(With mask,Wear a mask around chin and Without mask).The gradient according to the mask-wearing status,is analyzed through linear *** regression interpretation is based on coordinate information of mask-wearing status and the sample data collected in simulated environment that considering distances between objects and the camera in the World Coordinate *** the experiments,we found out that linear regression analysis is more suitable than logistic regression analysis for classification of people wea

关键词： Automatic quarantine process detection of improper mask wearers facial image coordinates convolution neural network

Pancreatic neuroendocrine tumors: biology, diagnosis, and treatment

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Chinese Journal of Cancer 2013年第6期32卷 312-324页

作者： Cynthia ro Wanxing Chai Victoria E.Yu Run Yu Cedars-Sinai Medical Center Los Angeles CA 90048 USA

Pancreatic neuroendocrine tumors (PNETs), a group of endocrine tumors arising in the pancreas, are among the most common neuroendocrine tumors. The genetic causes of familial and sporadic PNETs are somewhat understood, but their molecular pathogenesis remains unknown. Most PNETs are indolent but have malignant potential. The biological behavior of an individual PNET is unpredictable; higher tumor grade, lymph node and liver metastasis, and larger tumor size generally indicate a less favorable prognosis. Endocrine testing, imaging, and histological evidence are necessary to accurately diagnose PNETs. A 4-pronged aggressive treatment approach consisting of surgery, locoregional therapy, systemic therapy, and complication control has become popular in academic centers around the world. The optimal application of the multiple systemic therapeutic modalities is under development; efficacy, safety, availability, and cost should be considered when treating a specific patient. The clinical presentation, diagnosis, and treatment of specific types of PNETs and familial PNET syndromes, including the novel Mahvash disease, are summarized.

关键词：肿瘤生物学神经内分泌全身治疗胰腺诊断生物学行为发病机制学术中心

Pseudo-discontinuum model to simulate hard-rock mine pillars

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Underground Space 2023年第4期11卷 81-95页

作者： Erick ro genes Alessandra dos Santos Gomes Marcio Muniz de Farias Leandro Lima Rasmussen Faculty of Technology University of BrasiliaDF 70910-900BrasiliaBrazil

In this study,the pseudo-discontinuum modeling technique,called continuum Voronoi block model(CVBM),was applied to repre-sent the behavior of hard-rock pillars from underground mines subjected to high field *** CVBM’s ability to produce numerical results consistent with the observed behavior of pillars is demonstrated through the numerical analysis of a hypothetical case and a back analysis of the Creighton mine *** results show that the model can capture convergence displacements and explicitly show the formation of macro-fractures parallel to excavation walls,intact rock slabs,and V-shaped *** components are characteristics of brittle failure induced by highly stressed ground *** studies presented in this work confirm the CVBM as a convenient tool for the numerical modeling of intact rock pillars excavated in deep underground mines.

关键词： Brittle failure Spalling Bulking Voronoi tessellation

A left-sided periappendiceal abscess in an adult with intestinal malrotation

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World Journal of Gastroenterology 2006年第33期12卷 5399-5400页

作者： Min ro Lee Jong Hun Kim Yong Hwang Young Kon Kim Department of Surgery Chonbuk National University Medical School San 2-20Geumam-dong Deokjin-gu Jeonju 561-756 South Korea Research Institute of ClinicalMedicine Chonbuk National University Medical School San2-20 Geumam-dong Deokjin-gu Jeonju 561-756 South Korea Department of Surgery Chonbuk National University Medical School San 2-20Geumam-dong Deokjin-gu Jeonju 561-756 South Korea Department of Diagnostic Radiology ChonbukNational University Medical School San 2-20 Geumam-dongDeokjin-gu Jeonju 561-756 South Korea

Left-sided periappendiceal abscesses occur in association with two types of congenital anomaly: intestinal malrotation and situs inversus. It is diffi cult to obtain an accurate preoperative diagnosis of these abscesses due to the abnormal position of the appendix. We present an unusual case of a left-sided periappendiceal abscess in an adult with intestinal malrotation, the diagnosis of which was a challenge.

关键词： Left-sided periappendiceal abscess intestinalmalrotation Diagnosis

An Enhanced Jacobi Precoder for Downlink Massive MIMO Systems

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Computers, Materials & Continua 2021年第7期68卷 137-148页

作者： Park Chan-Yeob Hyun-ro Jae Jun-Yong Jang Song Hyoung-Kyu Department of Information and Communication Engineering and Convergence Engineering for Intelligent DroneSejong UniversitySeoul05006Korea

Linear precoding methods such as zero-forcing(ZF)are near optimal for downlink massive multi-user multiple input multiple output(MIMO)systems due to their asymptotic channel ***,as the number of users increases,the computational complexity of obtaining the inverse matrix of the gram matrix *** the computational complexity problem,this paper proposes an improved Jacobi(JC)-based precoder to improve error performance of the conventional JC in the downlink massive MIMO *** conventional JC was studied for solving the high computational complexity of the ZF algorithm and was able to achieve parallel ***,the conventional JC has poor error performance when the number of users increases,which means that the diagonal dominance component of the gram matrix is *** this paper,the preconditioning method is proposed to improve the error *** executing the JC,the condition number of the linear equation and spectrum radius of the iteration matrix are reduced by multiplying the preconditioning matrix of the linear *** further reduce the condition number of the linear equation,this paper proposes a polynomial expansion precondition matrix that supplements diagonal *** results show that the proposed method provides better performance than other iterative methods and has similar performance to the ZF.

关键词： Jacobi(JC) massive MIMO precondition polynomial expansion linear precoding

北京2022年冬奥会与冬残奥会延庆赛区,北京,中国

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世界建筑 2024年第4期 42-45页

作者： China Architecture Design&Research Group Beijing General Municipal Engineering Design&Research Institude Co.Ltd Ecosign Moutain Resort Planners Ltd Planungsbüro Deyle GmbH 中国建筑设计研究院有限公司北京市市政工程设计研究总院有限公司加拿大伊克森山地景区规划有限公司德国戴勒有限公司

北京2022年冬奥会与冬残奥会延庆赛区核心区规划和场馆及配套设施设计始于2017年1月,于2021年竣工投入使用。项目位于燕山山脉军都山以南的小海坨南麓,风景秀丽、山高林密、地形复杂、用地狭促,是最具挑战性的北京冬奥赛区。延庆赛区的... 详细信息

北京2022年冬奥会与冬残奥会延庆赛区核心区规划和场馆及配套设施设计始于2017年1月,于2021年竣工投入使用。项目位于燕山山脉军都山以南的小海坨南麓,风景秀丽、山高林密、地形复杂、用地狭促,是最具挑战性的北京冬奥赛区。延庆赛区的设计理念是“山林场馆,生态冬奥”,通过建筑、景观和赛道设计的联合创新,打造冬奥场馆历史上新的里程碑,同时最大限度减少对环境的扰动,使建筑与自然景观有机结合,在满足精彩赛事要求的基础上,建设一个融于自然山林中的冬奥赛区。

关键词：军都山残奥会联合创新延庆融于自然冬奥场馆最大限度