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Dual time point FDG PET imaging in evaluating pulmonary nodules with low FDG avidity

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Nuclear Science and Techniques 2010年第5期21卷 306-311页

作者： chen xiang ZHAO Jinhua song Jianhua XING Yan WANG Taisong QIAO Wenli Department of Nuclear Medicine Shanghai First People's Hospital Shanghai Jiaotong University Shanghai China

A standardized uptake value(SUV) of 2.5 is frequently used as criteria to evaluate pulmonary ***,false results may *** studies have shown the usefulness of delayed PET for improving accuracy,while others recently have shown fewer promising *** study was designed to investigate the accuracy of dual time point(DTP) FDG PET imaging in the evaluation of pulmonary lesions with an initial SUV less than *** FDG PET studies were conducted about 1 and 2 hours after FDG injection,and pulmonary lesions with an initial SUV less than 2.5 were *** with pathologic results or imaging follow up were *** differences in SUV and retention index(RI) between benign and malignant pulmonary lesions were *** operating characteristics(ROC) analysis was performed to evaluate the discriminating validity of SUV and RI.51 lesions were finally included.A RI greater than 0% was observed in 64% of the benign lesions;56% had a RI greater than 10%.Among the malignancies,80.8% had a RI greater than 0%,and 61.5% had a RI greater than 10%.We found no significant differences in SUV and RI between benign and malignant *** area under the ROC curve did not differ from 0.5 whether using SUV or the retention *** a SUV increase of 10%,the sensitivity was 61.5%,specificity 44% and accuracy was 52.9%.Dual time point FDG PET may not be of benefit in the evaluation of pulmonary nodules with low FDG avidity.

关键词：肺病变 FDG PET 时间点亲和力评价显像结节

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集团展开方法求解高温等离子体状态方程

四川大学学报（自然科学版） 2008年第4期45卷 875-878页

作者：刘慧陈相松四川大学物理科学与技术学院成都610064

高温等离子体状态方程是热核聚变实验和理论的重要参数.对于高温低密的等离子体,经典集团展开求解是最佳途径之一.但在应用中会遇到库仑相互作用的长程与短程发散困难.为了解决短程发散问题,本文引进一种半经典的波包近似模型,以波包的... 详细信息

高温等离子体状态方程是热核聚变实验和理论的重要参数.对于高温低密的等离子体,经典集团展开求解是最佳途径之一.但在应用中会遇到库仑相互作用的长程与短程发散困难.为了解决短程发散问题,本文引进一种半经典的波包近似模型,以波包的相互作用代替点粒子间的相互作用.对于库仑势能的长程发散,依旧采用传统的Debye-Hückel近似.较为简洁地求得了高温低密等离子体的状态方程.对于高温高密等离子,在量子统计的框架内作集团展开,由量子维里函数求得高阶近似的高温高密等离子状态方程.从而拓展了集团展开的应用范围,可以应用于等离子体性质的近一步研究.

关键词：等离子体状态方程库仑势能

Effects of MEK inhibitor U0126 on meiotic progression in mouse oocytes: microtuble organization, asymmetric division and metaphase Ⅱ arrest

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Cell Research 2003年第5期13卷 375-383页

作者： CHAO TONG, HENG YU FAN, DA YUAN chen, xiang FEN song, HEIDE SCHATTEN, QING YUAN SUNI 1 State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100080, China. 2 Department of Veterinary Pathobiology, University of Missouri-Columbia, MO 65211, USA State Key Laboratory of Reproductive Biology Institute of Zoology Chinese Academy of Sciences Beijing China Department of Veterinary Pathobiology University of Missouri-Columbia MO USA

In this study we used U0126, a potent and specific inhibitor of MEK, to study the roles of MEK/ERK/p90rsk signaling pathway in the meiotic cell cycle of mouse oocytes. The phosphorylation of MAP kinase and p90rsk in the oocytes treated with 1.5 μM U0126 was the same as that in oocytes cultured in drug-free medium. With 1.5 μM U0126 treatment, the spindles appeared normal as they formed in oocytes, but failed to maintain its structure. Instead, the spindle lost one pole or elongated extraordinarily. After further culture, some oocytes extruded gigantic polar bodies （>30 μm） that later divided into two small ones. Some oocytes underwent symmetric division and produced two equal-size daughter cells in which normal spindles formed. In oocytes with different division patterns, MAP kinase was normally phosphorylated. When the concentration of U0126 was increased to 15 mM, the phosphorylation of both MAPK and p90rsk were inhibited, while symmetric division was decreased. When incubating in medium c

关键词： kinases signal transduction oocyte development fertilization meiosis.

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引力子自作用的研究

四川大学学报（自然科学版） 2006年第6期43卷 1305-1309页

作者：郝斌政陈相松四川大学物理系成都610064

作者认为若要讨论引力子在宇宙演化中所起到的作用,就必须知道它们之间的相互作用.由于学术界以前更多关注的是粒子物理的效应,所以人们所关心的是它们的散射振幅,但是在宇宙学效应上,它们的相互作用势能与相互作用力才应是更加需要关心... 详细信息

作者认为若要讨论引力子在宇宙演化中所起到的作用,就必须知道它们之间的相互作用.由于学术界以前更多关注的是粒子物理的效应,所以人们所关心的是它们的散射振幅,但是在宇宙学效应上,它们的相互作用势能与相互作用力才应是更加需要关心的.在文中,作者利用它们的自相互作用势能的解析表达式来得到相应的散射振幅.由其相应的势能表达式可见,引力子的自作用在大尺度下可以有斥力项存在,这一特殊的性质不仅使得它可以作为宇宙暗物质和暗能量的候选者,同时亦可能对于解释宇宙的构成及演化起到一定的积极作用.

关键词：引力子相互作用散射振幅暗物质暗能量

关于用波包算法计算核子磁矩分解丢弃全微分项的研究(英文)

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四川大学学报（自然科学版） 2006年第4期43卷 843-846页

作者：代礼杰陈相松四川大学物理系成都610064

最近Mekfhi(***.D,2005,72:114014)指出,在用Gorden分解做核子磁矩的自旋轨道分解的时候,应该保留时间微分部分,因为夸克场是依赖于时间的.作者说明了为什么当粗略研究一个粒子(不管这个粒子是基本的,还是复合的)的内禀磁矩的时候,是可... 详细信息

最近Mekfhi(***.D,2005,72:114014)指出,在用Gorden分解做核子磁矩的自旋轨道分解的时候,应该保留时间微分部分,因为夸克场是依赖于时间的.作者说明了为什么当粗略研究一个粒子(不管这个粒子是基本的,还是复合的)的内禀磁矩的时候,是可以忽略掉这一项的,即使考虑波包而不是平面波,因为实际世界中,遇到的更多是波包.作者同样也注意到在一个复合粒子的现象模型中,这一项可能是非零的,因为这个模型中的波函数可能不是真实的Hamiltonian本征态.

关键词：核子磁矩 Gorden分解波包

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宇宙常数模型中传统能动量赝张量的修正

四川大学学报（自然科学版） 2006年第6期43卷 1327-1331页

作者：朱本超陈相松四川大学物理系成都610064

如果考虑到存在宇宙常数Λ的时空,那么传统的Einstein,Landau,Lifshitz,Mφller,Papa-petro的能动量赝张量就不能给出一个确定的和守恒的能量.这样就必须对不等于零的Λ模型中的能量进行修正(如果不舍弃这个能量),正如Arnowitt-Deser-Mi... 详细信息

如果考虑到存在宇宙常数Λ的时空,那么传统的Einstein,Landau,Lifshitz,Mφller,Papa-petro的能动量赝张量就不能给出一个确定的和守恒的能量.这样就必须对不等于零的Λ模型中的能量进行修正(如果不舍弃这个能量),正如Arnowitt-Deser-Misner(ADM)项和Abbott-Deser(AD)修正项一样,总可以找到一个更加基础和成功的方法来修正这个Einstein赝张量,但是(值得注意的是)对其他的赝张量却并不适用.修正的Einstein能量可给出在de Sitter(dS)和anti-de Sitter(AdS)背景中正确的结果,同时也可避免在dS情况下AD能量的一个奇异的宇宙常数视界的问题.

关键词：爱因斯坦赝张量能动量赝张量 AD能量

Laparoscopic liver resection utilizing the ventral avascular area of the inferior vena cava:A retrospective cohort study

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World Journal of Gastroenterology 2025年第1期31卷 42-57页

作者： Kun Huang Zhu chen Heng Xiao Hai-Yang Hu Xing-Yu chen cheng-You Du xiang Lan Department of Hepatobiliary Surgery The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400000China Department of General Surgery Mianyang Hospital of Traditional Chinese MedicineMianyang 621000Sichuan ProvinceChina

BACKGROUND Laparoscopic liver resection(LLR)can be challenging due to the difficulty of establishing a retrohepatic tunnel under *** the third hepatic hilum before parenchymal transection often leads to significant liver mobilization,tumor compression,and bleeding from the short hepatic veins(SHVs).This study introduces a novel technique utilizing the ventral avascular area of the inferior vena cava(IVC),allowing SHVs to be addressed after parenchymal transection,thereby reducing surgical complexity and improving outcomes in in situ *** To introduce and evaluate a novel LLR technique using the ventral avascular area of the IVC and compare its short-term outcomes with conventional *** The clinical cohort data of patients with pathologically confirmed hepatocellular carcinoma or intrahepatic cholangiocarcinoma who underwent conventional LLR and novel LLR between July 2021 and July 2023 at the First Affiliated Hospital of Chongqing Medical University were retrospectively *** novel LLR,we initially separated the caudate lobe from the IVC using dissecting forceps along the ventral avascular area of the ***,we transected the parenchyma of the left and right caudate lobes from the caudal side to the cephalic side using the avascular area as a ***,we addressed the SHVs and finally dissected the root of the right hepatic vein or left hepatic *** short-term postoperative outcomes and oncological results of the two approaches were evaluated and *** A total of 256 patients were included,with 150(58.59%)undergoing conventional LLR and 106(41.41%)undergoing novel *** novel technique resulted in significantly larger tumor resections(6.47±2.96 cm vs 4.01±2.33 cm,P<0.001),shorter operative times(199.57±60.37 minutes vs 262.33±83.90 minutes,P<0.001),less intraoperative blood loss(206.92±37.09 mL vs 363.34±131.27 mL,P<0.001),and greater resection volume(345.11±31.40 mL vs 264.38±31.98 mL,P<0.001)comp

关键词： Laparoscopic liver resection Inferior vena cava Retrohepatic tunnel Short hepatic veins Complex liver tumors Intraoperative bleeding control

基于随机卷积核与孤立森林柱塞泵异常检测方法

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液压与气动 2023年第2期47卷 26-33页

作者：陈香松陶建峰刘成良上海交通大学机械与动力工程学院上海200240

液压柱塞泵出口压力脉动信号近似于周期信号,有比较明确的物理含义,携带着丰富的泵的健康状态信息,是柱塞泵健康管理比较理想的信号源。利用柱塞泵出口压力上的脉动成分,提出一种基于随机卷积核的柱塞泵异常检测方法,只需柱塞泵在正常... 详细信息

液压柱塞泵出口压力脉动信号近似于周期信号,有比较明确的物理含义,携带着丰富的泵的健康状态信息,是柱塞泵健康管理比较理想的信号源。利用柱塞泵出口压力上的脉动成分,提出一种基于随机卷积核的柱塞泵异常检测方法,只需柱塞泵在正常工况下的压力脉动数据即可具备检测异常压力脉动数据的能力。该方法包括波形划分、异常数据段检测2个阶段:采用基于动态时间规整(Dynamic Time Warping, DTW)数据划分算法对柱塞泵压力脉动原始数据进行分割,获取压力脉动数据段以构建数据集;基于大量一维随机卷积核提取特征,获取正常状态下压力脉动数据段特征;使用孤立森林算法对基于随机卷积核提取的特征进行异常检测。该方法在真实数据集上的表现,表明其对于异常波形的判断有优异的表现,且查准率较单一孤立森林算法提升了6.3%。

关键词：柱塞泵异常检测随机卷积核孤立森林

MoS_(2)Lubricate‑Toughened MXene/ANF Composites for Multifunctional Electromagnetic Interference Shielding

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Nano-Micro Letters 2025年第2期17卷 358-371页

作者： Jiaen Wang Wei Ming Longfu chen Tianliang song Moxi Yele Hao Zhang Long Yang Gegen Sarula Benliang Liang Luting Yan Guangsheng Wang School of Physical Science and Engineering Beijing Jiaotong UniversityBeijing 100044People’s Republic of China Key Laboratory of Bio‑Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191People’s Republic of China

The design and fabrication of high toughness electromagnetic interference(EMI)shielding composite films with diminished reflection are an imperative task to solve electromagnetic pollution *** MXene/ANF(aramid nanofibers)–MoS_(2)composite films with nacre-like layered structure here are fabricated after the introduction of MoS_(2)into binary MXene/ANF composite *** introduction of MoS_(2)fulfills an impressive“kill three birds with one stone”improvement effect:lubrication toughening mechanical performance,reduction in secondary reflection pollution of electromagnetic wave,and improvement in the performance of photothermal *** the introduction of MoS_(2)into binary MXene/ANF(mass ratio of 50:50),the strain to failure and tensile strength increase from 22.1±1.7%and 105.7±6.4 MPa and to 25.8±0.7%and 167.3±9.1 MPa,*** toughness elevates from 13.0±4.1 to 26.3±0.8 MJ m^(−3)(~102.3%)*** the reflection shielding effectiveness(SE_(R))of MXene/ANF(mass ratio of 50:50)decreases~10.8%.EMI shielding effectiveness(EMI SE)elevates to 41.0 dB(8.2–12.4 GHz);After the introduction of MoS_(2)into binary MXene/ANF(mass ratio of 60:40),the strain to failure increases from 18.3±1.9%to 28.1±0.7%(~53.5%),the SE_(R)decreases~22.2%,and the corresponding EMI SE is 43.9 *** MoS_(2)also leads to a more efficient photothermal conversion performance(~45 to~55℃).Additionally,MXene/ANF–MoS_(2)composite films exhibit excellent electric heating performance,quick temperature elevation(15 s),excellent cycle stability(2,2.5,and 3 V),and long-term stability(2520 s).Combining with excellent mechanical performance with high MXene content,electric heating performance,and photothermal conversion performance,EMI shielding ternary MXene/ANF–MoS_(2)composite films could be applied in many industrial *** work broadens how to achieve a balance between mechanical properties and versatility of composites in the case of high-function fillers.

关键词： MXene-MoS_(2) Lubrication toughening EMI shielding Photothermal conversion Electric heating performance