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Detection and Location of a Target in Layered Media by Snapshot Time Reversal and Reverse Time Migration Mixed Method

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Chinese Physics Letters 2019年第11期36卷 31-34页

作者： hong-juan yang Jian Li Xiang Gao Jun Ma Jun-hong Li Wen Wang Cheng-Hao Wang Institute of Acoustics Chinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049 School of Electronic and Electrical Engineering Wuhan Textile UniversityWuhan 430200 State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of SciencesBeijing 100190 College of Mechanical Engineering and Application Electronics Technology Beijing University of TechnologyBeijing 100124

A target in layered medium can be located by the ridge-like distribution time reversal and reverse time migration(TR-RTM) mixed method. However, this method cannot distinguish between acoustic field distributions of the interface and target for the wider acoustic pulse signals, which may result in inaccurate location of the target. A snapshot TR-RTM mixed method is proposed to solve this problem. The principle of snapshot TR-RTM mixed method is first given. Experiments are then carried out, and a mountain-like acoustic field distribution is obtained by processing experimental data. The results show that the location of the peak is that of the target, and the ratio of the scattered signal and interface reflection signal(signal-to-interference ratio) is improved by about four times after processing. Furthermore, this method can effectively suppress the interface reflection signal and enhance the target scattering signal. Therefore, it can achieve effective detection and location of a target in a layered medium.

关键词： scattering interface layered

Detection and Location of a Target in Layered Media without Prior Knowledge of Medium Parameters

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Chinese Physics Letters 2020年第6期37卷 40-43页

作者： Jian Li hong-juan yang Jun Ma Xiang Gao Jun-hong Li Jian-Zheng Cheng Wen Wang Cheng-Hao Wang School of Electronic and Electrical Engineering Wuhan Textile UniversityWuhan 430200China State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of SciencesBeijing 100190China Institute of Acoustics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China College of Mechanical Engineering and Application Electronics Technology Beijing University of TechnologyBeijing 100124China

Without prior knowledge of medium parameters,a method is proposed to detect and locate a target in layered *** were carried out for liquid/liquid and solid/liquid layered media,and the location of a target in them was obtained using three methods combined,i.e.,the least-square method,the method of finding minimum dispersal degree of target distribution,and the snapshot time reversal and reverse time migration mixed *** medium parameters,i.e.,the acoustic velocities of upper and lower media as well as the thickness of the upper medium,were inversed *** results show that the position of target is consistent with its actual ***,the detection and location of a target in layered media are achieved without prior knowledge of medium parameters,and it overcomes the difficulty that the common time reversal method only detects the target,but cannot locate it.

关键词： media method overcome

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国际纺织品服装贸易发展的新趋势

外交学院学报 2003年第3期 79-84页

作者：洪涓余艳北京工业大学北京100022

随着《纺织品与服装协议》的签定和中国加入世界贸易组织的进程,传统的纺织品服装贸易中的配额等贸易壁垒将会逐年递减并于2005年1月1日被正式取消,这将极大地促进我国纺织品服装贸易的发展。然而与此同时,纺织品服装出口中的一些非关... 详细信息

随着《纺织品与服装协议》的签定和中国加入世界贸易组织的进程,传统的纺织品服装贸易中的配额等贸易壁垒将会逐年递减并于2005年1月1日被正式取消,这将极大地促进我国纺织品服装贸易的发展。然而与此同时,纺织品服装出口中的一些非关税壁垒正在发生着新的变化,以绿色壁垒、社会壁垒以及其他一些新的形式相继出现,为我国纺织品服装贸易设置了新的障碍。对于这些新型壁垒的研究已经迫在眉睫,本文即针对这个新的趋势加以研究,提出了一些相应的对策和观点。

关键词：《纺织品与服装协议》配额绿色壁垒社会壁垒

BZS1, a B-box Protein, Promotes Photomorphogenesis Downstream of Both Brassinosteroid and Light Signaling Pathways

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Molecular Plant 2012年第3期5卷 591-600页

作者： Xi-Ying Fan Yu Sun Dong-Mei Cao Ming-Yi Bal Xiao-Min Luo hong-juan yang Chuang-Qi Wei Sheng-Wei Zhu Ying Sun Kang Chonga Zhi-Yong Wang Institute of Botany Chinese Academy of Sciences Beijing 100093 China Institute of Molecular Cell Biology College of Life Science Hebei Normal University Shijiazhuang Hebei 050016 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China Institute of Horticulture Shanxi Academy of Agriculture Sciences Shanxi 030031 China Department of Plant Biology Carnegie Institution for Science Stanford CA 94305 USA

Photomorphogenesis is controlled by multiple signaling pathways, including the light and brassinosteroid （BR） pathways. BR signaling activates the BZR1 transcription factor, which is required for suppressing photomorphogen- esis in the dark, We identified a suppressor of the BR hypersensitive mutant bzrl-lD and named it bzrl-lD suppressorl- Dominant （bzsl-D）. The bzsl-D mutation was caused by overexpression of a B-box zinc finger protein BZS1, which is transcriptionally repressed by BZR1. Overexpression of BZS1 causes de-etiolation in the dark, short hypocotyls in the light, reduced sensitivity to BR treatment, and repression of many BR-activated genes. Knockdown of BZS1 by co-suppression partly suppressed the short hypocotyl phenotypes of BR-deficient or insensitive mutants. These results support that BZSl is a negative regulator of BR response. BZS1 overexpressors are hypersensitive to different wavelengths of light and loss of function of BZS1 reduces plant sensitivity to light and partly suppresses the constitutive photomorphogenesis 1 （cop1） mutant in the dark, suggesting a positive role in light response. BZS1 protein accumulates at an increased level after light treatment of dark-grown BZSl-OXplants and in the cop1 mutants, and BZS1 interacts with COP1 in vitro, suggesting that light regulates BZS1 through COPl-mediated ubiquitination and proteasomal degradation. These results demonstrate that BZS1 mediates the crosstalk between BR and light pathways.

关键词： photomorphogenesis light signaling Brassinosteroid BZS1 Arabidopsis

Return to work in young and middle-aged colorectal cancer survivors:Factors influencing self-efficacy,fear,resilience,and financial toxicity

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World Journal of Gastroenterology 2025年第1期31卷 79-92页

作者： Dan Hu Yue Li Hua Zhang Lian-Lian Wang Wen-Wen Liu Xin yang Ming-Zhao Xiao Hao-Ling Zhang juan Li Department of Nursing The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Department of Nursing National Clinical Research Center for Child Health and DisordersMinistry of Education Key Laboratory of Child Development and DisordersChildren’s Hospital of Chongqing Medical UniversityChongqing 400014China Department of Gastrointestinal Surgery The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Department of Biomedical Science Advanced Medical and Dental InstituteUniversity Sains MalaysiaPenang 13200Malaysia Academic Affairs Office The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China

BACKGROUND Return to work(RTW)serves as an indication for young and middle-aged colorectal cancer(CRC)survivors to resume their normal social ***,these survivors encounter significant challenges during their RTW ***,scientific research is necessary to explore the barriers and facilitating factors of returning to work for young and middle-aged CRC *** To examine the current RTW status among young and middle-aged CRC survivors and to analyze the impact of RTW self-efficacy(RTW-SE),fear of progression(FoP),eHealth literacy(eHL),family resilience(FR),and financial toxicity(FT)on their RTW *** A cross-sectional investigation was adopted in this *** September 2022 to February 2023,a total of 209 participants were recruited through a convenience sampling method from the gastrointestinal surgery department of a class A tertiary hospital in *** investigation utilized a general information questionnaire alongside scales assessing RTW-SE,FoP,eHL,FR,and *** analyze the factors that influence RTW outcomes among young and middle-aged CRC survivors,Cox regression modeling and Kaplan-Meier survival analysis were *** A total of 43.54%of the participants successfully returned to work,with an average RTW time of 100 *** regression univariate analysis revealed that RTW-SE,FoP,eHL,FR,and FT were significantly different between the non-RTW and RTW groups(P<0.05).Furthermore,Cox regression multivariate analysis identified per capita family monthly income,job type,RTW-SE,and FR as independent influencing factors for RTW(P<0.05).CONCLUSION The RTW rate requires further *** levels of RTW-SE and FR were found to significantly increase RTW among young and middle-aged CRC *** professionals should focus on modifiable factors,such as RTW-SE and FR,to design targeted RTW support programs,thereby facilitating their timely reintegration into mainstream society.

关键词： Return to work Colorectal neoplasms Return-to-work self-efficacy Fear of progression Family resilience Financial toxicity

生物电阻抗技术评价终末期肾脏病患者人体成分及营养状况的研究

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中国现代医学杂志 2016年第19期26卷 75-79页

作者：崔红蕊李明明杨洪娟胡秀红王静牛哲莉任广伟河北医科大学第一医院肾内科河北石家庄050031

目的应用生物电阻抗技术(BIA)分析比较终末期肾脏病(ESRD)未行血液透析患者和已行血液透析患者与正常健康人群的人体成分及营养状况。方法选取该院肾内科ESRD住院患者中,未行肾替代治疗患者30例为未透析组;血透室门诊规律血液透析患者3... 详细信息

目的应用生物电阻抗技术(BIA)分析比较终末期肾脏病(ESRD)未行血液透析患者和已行血液透析患者与正常健康人群的人体成分及营养状况。方法选取该院肾内科ESRD住院患者中,未行肾替代治疗患者30例为未透析组;血透室门诊规律血液透析患者30例为透析组;健康体检者30例为对照组。采用人体成分分析仪,对3组受试人员的人体成分及营养状况进行分析。结果未透析组、透析组患者的细胞外液与对照组比较,差异有统计学意义(P0.05)。未透析组、透析组患者的细胞外液与细胞内液的比值与对照组比较,差异有统计学意义(P0.05),但是透析组和未透析组患者的血清白蛋白、血红蛋白、红细胞比容、血清尿素氮、血清肌酐及C-反应蛋白与对照组比较,差异有统计学意义(P0.05)。结论 ESRD患者普遍存在体液分布异常及营养不良状况。BIA可以对ESRD患者体液分布及营养状况进行快速监测,是测量ESRD患者身体成分的有效工具,为ESRD患者的救治及营养不良的纠正争取时间。

关键词：生物电阻抗技术终末期肾脏病血液透析

胱抑素C、肾损伤分子-1、血肌酐在先天性心脏病体外循环术所致急性肾损伤早期预警中的临床价值

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中国现代医学杂志 2016年第5期26卷 31-35页

作者：胡秀红杨洪娟王会卿王静李明明崔红蕊任广伟牛哲莉河北医科大学第一医院河北石家庄050031 河北省定州市妇幼保健院河北定州073000

目的探讨胱抑素C(CySC)、肾损伤分子-1(Kim^(-1))、血肌酐(SCr)在先天性心脏病(以下简称先心病)体外循环术(CPB)所致急性肾损伤(AKI)早期预警中的临床价值。方法选取2014年5月-2014年12月收住入院的先心病患者100例,将CPB术后发生AKI患... 详细信息

目的探讨胱抑素C(CySC)、肾损伤分子-1(Kim^(-1))、血肌酐(SCr)在先天性心脏病(以下简称先心病)体外循环术(CPB)所致急性肾损伤(AKI)早期预警中的临床价值。方法选取2014年5月-2014年12月收住入院的先心病患者100例,将CPB术后发生AKI患者26例作为Ⅰ组,术后未发生AKI患者74例作为Ⅱ组。比较分析两组CPB前及术后各时间CySC、Kim^(-1)、SCr水平,以及SCr、尿量(UPD)的变化。结果 CPB前,两组CySC、Kim^(-1)、SCr水平比较,差异无统计学意义(P>0.05);Ⅱ组术后CySC、Kim^(-1)、SCr水平与术前比较,差异无统计学意义(P>0.05);Ⅰ组术后2 h CySC、6 h Kim^(-1)升高,并在术后12 h达峰值(P<0.05),SCr术后即开始逐步升高,术后12 h达小高峰,其后缓慢升高(P<0.05);术后各时间段Ⅰ组CySC、Kim^(-1)、SCr水平高于同时间Ⅱ组水平(P<0.05),但UPD低于Ⅱ组,差异有统计学意义(P<0.05);KIM-1、Cys C、SCr联合检测受试者工作特征曲线下面积最大,为0.8563,高于SCr和UPD联合检测的0.7135。结论先心病CPB术后发生Ak I的概率较高(26%);CySC、Kim^(-1)在AKI发生的超早期即升高,而SCr在AKI发生过程中呈相对缓慢升高的态势,相较于传统的SCr、UPD联合检测,KIM-1、Cys C、SCr联合检测在先心病行CPB所致AKI早期预警中具有更高的临床价值,值得大力推广。

关键词：胱抑素C(CySC) 肾损伤分子-1(Kim-1) 血肌酐(SCr) 先天性心脏病体外循环术急性肾损伤早期预警

食品接触材料中壬基酚和辛基酚的测定与风险分析

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包装工程 2017年第19期38卷 110-114页

作者：赖红娟王海洋熊小婷邝雅怡邓金伟孙剑广州质量监督检测研究院广州511447

目的研究食品接触材料中壬基酚和辛基酚的含量和迁移量的情况,并分析食品暴露风险。方法采用液相色谱-质谱联用法建立食品接触材料中壬基酚和辛基酚含量和迁移量的检测方法,并对相关检测数据进行统计分析。结果在优化条件下,壬基酚和辛... 详细信息

目的研究食品接触材料中壬基酚和辛基酚的含量和迁移量的情况,并分析食品暴露风险。方法采用液相色谱-质谱联用法建立食品接触材料中壬基酚和辛基酚含量和迁移量的检测方法,并对相关检测数据进行统计分析。结果在优化条件下,壬基酚和辛基酚在5~200μg/L范围内线性关系良好,相关系数均大于0.999,壬基酚和辛基酚含量和迁移量的检测方法定量下限分别为0.1 mg/kg和10μg/kg,在添加水平为10,100,200μg/L时,样品中壬基酚和辛基酚含量的平均加标回收率为85.6%~89.2%,迁移量的回收率为94.3%~100.6%,相对标准偏差均小于15%。对30批次保鲜膜和复合包装袋样品进行检测,结果显示,6批次样品检出壬基酚或辛基酚,占总体样品的20%;其中1批次样品检出壬基酚迁移量,占阳性样品的16.7%。结论保鲜膜和复合包装袋可能含有壬基酚和辛基酚,且容易迁移到食品模拟物中,迁移量随着温度的升高和时间的延长而增加。保鲜膜和复合包装袋中的壬基酚和辛基酚存在一定风险,应引起足够重视。

关键词：食品接触材料壬基酚辛基酚含量迁移量测定风险分析

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槟榔碱对3T3-L1脂肪细胞脂代谢的影响

中国应用生理学杂志 2017年第1期33卷 22-25页

作者：凌宏艳贺娟杨丝丝张恺芳何剑琴朱责梅奉水东南华大学生理学教研室湖南医药学院生理学教研室南华大学社会医学与卫生事业管理学教研室湖南衡阳421001

目的:观察槟榔碱对3T3-L1脂肪细胞脂代谢的影响并探讨其可能机制。方法:采用经典的"鸡尾酒"法诱导3T3-L1前脂肪细胞分化成熟,随后用不同浓度的槟榔碱(0、25、50、100μmol/L)处理成熟脂肪细胞72 h。72 h后,四甲基偶氮唑盐(MTT)法检测细... 详细信息

目的:观察槟榔碱对3T3-L1脂肪细胞脂代谢的影响并探讨其可能机制。方法:采用经典的"鸡尾酒"法诱导3T3-L1前脂肪细胞分化成熟,随后用不同浓度的槟榔碱(0、25、50、100μmol/L)处理成熟脂肪细胞72 h。72 h后,四甲基偶氮唑盐(MTT)法检测细胞的活性;油红O染色观察胞浆内脂滴情况;Western blot检测脂肪酸合成酶(FAS)、甘油三酯脂肪酶(ATGL)、激素敏感性脂肪酶(HSL)蛋白表达。结果:诱导分化成熟的脂肪细胞胞浆内可见大量脂滴;MTT显示:0~100μmol/L槟榔碱对脂肪细胞活力无显著影响;油红O染色后脂质含量测定结果表明槟榔碱能减少成熟脂肪细胞中脂质含量;Western blot结果显示:与0μmol/L组(对照组)相比,槟榔碱可显著降低脂肪细胞内FAS的蛋白表达,增加ATGL和HSL的蛋白表达;其中以50μmol/L组最为显著。结论:槟榔碱使脂肪细胞脂解增强,可能与降低脂质合成关键酶FAS的表达,增加脂质分解代谢关键酶ATGL和HSL的表达有关。

关键词：槟榔碱 3T3-L1脂肪细胞脂代谢