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基于波传播特性的钢板桩振动环境效应评价和预测

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建筑结构 2024年第13期54卷 149-156页

作者：田培先刘双庆吴迪林军吴章平唐昌意广东省广建设计集团有限公司广州511453 中国石油华北油田分公司任丘062552 江苏开放大学建筑工程学院南京210036 湖北天佑博诚建设工程有限公司武汉430051 珠海市规划设计研究院珠海519001

通过三轴测振仪,对3个典型地区不同厚度软土的项目钢板桩振动沉桩进行监测,提取了距离沉桩点不同距离处地表的径向、切向和竖向的振动加速度,并利用Mathematica和SeismoSignal软件,分析了振动峰值加速度和振动峰值速度随距离沉桩点不同... 详细信息

通过三轴测振仪,对3个典型地区不同厚度软土的项目钢板桩振动沉桩进行监测,提取了距离沉桩点不同距离处地表的径向、切向和竖向的振动加速度,并利用Mathematica和SeismoSignal软件,分析了振动峰值加速度和振动峰值速度随距离沉桩点不同距离的变化趋势。结果表明,软土地区的振动峰值加速度和振动峰值速度均在距离沉桩点一定距离处发生突变,造成该突变的原因和压缩波传到地面有关,突变点与沉桩点之间的最短距离即为临界距离。采用GDS⁃RCA共振柱三轴测振仪,对3个场地振动沉桩前后距离沉桩点不同距离处的土体剪切模量进行测试,得到影响临界距离的因素,并通过测试数据得到临界距离处振动峰值速度差值与软土层厚度、土阻抗之比和临界距离之间的关系和改进的振动峰值速度预测方程;改进后的方程不仅真实地反映了不同软土层厚度、土层参数以及临界距离对振动峰值速度的影响,而且更真实地反映了软土地区振动衰减规律。

关键词：钢板桩动力法沉桩振动监测共振柱临界距离振动峰值速度振动峰值加速度

金龟子绿僵菌制剂对二化螟的防效及体内相关酶活性的影响

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湖南农业大学学报（自然科学版） 2024年第4期50卷 65-69页

作者：邓璇璇匡炜方宝华张亚刘双清湖南农业大学植物保护学院湖南长沙410128 湖南省水稻研究所湖南长沙410125

用剂量为1.6×10^(7)/mL的金龟子绿僵菌CQMa421制剂处理二化螟幼虫,测定该制剂对二化螟幼虫的毒力及其对幼虫总蛋白含量及过氧化氢酶(CAT)、过氧化物酶(POD)、超氧化物歧化酶(SOD)等3种保护酶活性和羧酸酯酶(CarE)、乙酰胆碱酯酶(AChE)... 详细信息

用剂量为1.6×10^(7)/mL的金龟子绿僵菌CQMa421制剂处理二化螟幼虫,测定该制剂对二化螟幼虫的毒力及其对幼虫总蛋白含量及过氧化氢酶(CAT)、过氧化物酶(POD)、超氧化物歧化酶(SOD)等3种保护酶活性和羧酸酯酶(CarE)、乙酰胆碱酯酶(AChE)、碱性蛋白酶(AKP)和谷胱甘肽S-转移酶(GSTs)等4种解毒酶活性的影响。结果表明:经金龟子绿僵菌制剂处理后,二化螟幼虫的存活率呈持续下降趋势,半致死时间(LT_(50))为7.23 d,第10天死亡率为56.89%,说明金龟子绿僵菌制剂对二化螟幼虫具有显著毒力;金龟子绿僵菌制剂处理3d时,二化螟幼虫蛋白质含量最高;POD、CAT、SOD等3种保护酶活性分别在处理2、4、5 d时达到最高,分别为198.76、19.59和12.90 U/mg,均显著高于对照组相应酶的活性;4种解毒酶GSTs、AChE、CarE和AKP最高活性分别约为对照组的1.68、1.68、1.27和1.62倍,说明经金龟子绿僵菌制剂CQMa421处理后,二化螟幼虫体内稳态遭到破坏,进而受到毒害。

关键词：金龟子绿僵菌CQMa421制剂二化螟毒力保护酶解毒酶

Seismicity characteristics of the 2011 M9.0 Tohoku earthquake near the East Coast of Honshu in Japan

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Chinese Science Bulletin 2012年第8期57卷 886-893页

作者： XUE Yan liu Jie YU HuaiZhong liu shuangqing Institute of Geophysics China Earthquake AdministrationBeijing 100081China China Earthquake Networks Center Beijing 100045China Earthquake Administration of Tianjin Municipality Tianjin 300201China

The spatiotemporal evolution of the M9.0 Tohoku earthquake sequence off the East Coast of Honshu in Japan on March 11,2011 and precursive seismic activity near the Japan Trench show that the earthquake sequence has foreshock-main shock-aftershock *** foreshock sequence is characterized by a concentrated spatial distribution,low b value and the same focal *** an hour after the main shock,the two greatest aftershocks,with magnitudes of M7.9 and M7.7,occurred,followed by a rapid reduction in the strength of *** aftershock activity was enhanced roughly two weeks and one month after the main *** great earthquake ruptured *** hours after the main shock,the aftershock zone extended over a range that was 500 km in length and 300 km in width.A day later,the long axis of the aftershock area had expanded to about 600 *** years prior to the 2011 earthquake,the seismicity in the location of the seismic source for this event enhanced significantly,with the extent of this area of enhanced seismicity being roughly equivalent to the aftershock zone.

关键词：地震活动特征日本海沟东海岸东北地震序列余震活动时空演化空间分布

Distribution and degradation kinetics of cyhalodiamide in Chinese rice field environment

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Chinese Journal of Chemical Engineering 2018年第10期26卷 2185-2191页

作者： Yiping liu Ya Zhang shuangqing liu Yuntao Lü Ronghua Lin Min Li Xiaolan Liao Xiaogang Li College of Plant Protection Hunan Agricultural University Institute for the Control of Agrochemicals Hunan Province Institute for the Control of Agrochemicals Ministry of Agriculture and Rural Affairs

Cyhalodiamide is a novel agrochemical which is effective against Lepidoptera pests,including Cnaphalocrocis medinalis,Chilo suppressalis,Pieris rapae,Plutella xylostella,Helicoverpa armigera,*** the study,a fast and accurate analytical method was developed to detect cyhalodiamide in Chinese typical rice field environment by a modified Qu ECh ERS(Quick,Easy,Cheap,Effective,Rugged,Safe)method with UPLC-MS/MS(ultra-high performance chromatography-tandem mass spectrometry).The mean recoveries of cyhalodiamide varied from 73.5% to 107.5%,with the RSDs from 1.2% to 10.7%.The limits of determination(LODs)were 0.0005 mg·kg^(-1),and the limits of quantitation(LOQs)were from 0.002 to 0.01 mg·kg^(-1)in all five *** method was used to determine cyhalodiamide residues for studies of the distribution and degradation kinetics in rice field *** field trials results showed that cyhalodiamide was easily degradable and the half-lives were4.2–13.6 d in rice straw,8.77 d in paddy soil and 5.37–8.45 d in paddy water,*** final residues of cyhalodiamide in brown rice were below 0.35 mg·kg^(-1).The used dosage of 33.75 g·hm^(-2)with pre-harvest interval(PHI)of 21 d and the maximum residue limit(MRL)of cyhalodiamide in rice at 0.1 mg·kg^(-1)were recommended,which would be safe to human health and *** developed analytical method will be useful to monitor cyhalodiamide residues and safety evaluation in rice environment.

关键词： Cyhalodiamide QuEChERS Rice Residue Degradation kinetics

A flat-foldable equiangular spiral folding pattern inspired by sunflowers for deployable structures

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Chinese Journal of Aeronautics 2024年第6期37卷 425-438页

作者： shuangqing YU Jinguo liu Pengyuan ZHAO Yingying TANG State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang 110016China Institutes for Robotics and Intelligent Manufacturing Chinese Academy of SciencesShenyang 110169China University of Chinese Academy of Sciences Beijing 100049China

Flasher origami pattern has been widely utilized to improve the stowage efficiency of deployable ***,flasher origami cannot be folded fully flat,and they still have great potential for optimization in terms of storage volume and folding *** this paper,a flat foldable equiangular spiral folding pattern inspired by the sunflower disk is ***,a parametric design method for this equiangular spiral crease diagram is introduced in ***,a kinematic model of the equiangular spiral folding pattern is established based on the kinematic equivalence between rigid origami and spherical linkages.A simulation of the developed model demonstrates that the equiangular spiral folding pattern can be folded *** the folded ratio as an evaluation index,the calculated results and experiments show that the equiangular spiral crease pattern can yield fewer creases and improve stowage efficiency in comparison to flasher origami *** spiral folding pattern can save a considerable amount of space and provide a new approach to spatially deployable structures.

关键词： Flasher origami Sunflower-inspired Deployable structures Flat-foldability Equiangular spiral folding pattern

湖南省大豆玉米带状复合种植模式及病虫草害综合防控技术

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现代农业科技 2024年第13期 208-212,216页

作者：刘磊黄运友冯正锐杨龙飞张亚刘双清湖南农业大学植物保护学院湖南长沙410128 临湘市农业农村局湖南临湘414300 平江县农业农村局湖南平江414500

大豆作为我国重要的粮油兼用作物,在国家粮食安全中占有重要地位。但是,我国大豆种植面积有限,单作产量较低,常年依赖进口。因此,我国提出了大豆玉米带状复合种植模式。近年来,湖南省大力发展大豆玉米带状复合种植,围绕种植技术的田间... 详细信息

大豆作为我国重要的粮油兼用作物,在国家粮食安全中占有重要地位。但是,我国大豆种植面积有限,单作产量较低,常年依赖进口。因此,我国提出了大豆玉米带状复合种植模式。近年来,湖南省大力发展大豆玉米带状复合种植,围绕种植技术的田间试验、集成应用和示范推广开展了深入研究。本文从品种选择、行比配置、播种、田间管理、收获等方面总结了湖南省大豆玉米带状复合种植技术,并总结了病虫草害综合防控技术,分析了种植技术环节存在的问题,以期为该种植模式的推广应用提供参考。

关键词：大豆玉米带状复合种植技术模式病虫草害综合防控湖南省

Application of oxygen vacancy defects in enhanced anti-cancer nanomedicine

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中国科学:化学英文版 2023年第9期66卷 2492-2512页

作者： Yuan Gao shuangqing liu Hui liu Haiyan Ge Meng Zhang Chunyu Zhao Yufang Gong Xinyu Zhang Chao Wang Xiao Sun Zhengyan Wu School of Chemistry and Pharmaceutical Engineering Medical Science and Technology Innovation CenterShandong First Medical University&Shandong Academy of Medical SciencesJinan 250000China Key Laboratory of High Magnetic Field and Ion Beam Physical Biology Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China

Nanomedicine has become an important development direction of modern medicine, and provides a new way for cancer theranostics. To extend the superior physicochemical property of nanomedicine and enhance their role in cancer theranostics,various strategies have been proposed. Among them, the introduction of oxygen vacancies can enhance the separation of electron-hole pairs and improve the nanomaterials' catalytic activity, which is beneficial for cancer diagnosis and treatment. This review briefly summarized the formation mechanism and preparation methods of various oxygen vacancy nanomaterials. Then,the effect and application of various oxygen vacancy nanomaterials, such as iron, manganese, titanium, zinc, bismuth, tungsten,cerium, and molybdenum-based nanomaterials in enhancing cancer theranostics were highlighted. At last, the prospect and challenges of oxygen vacancy nanomaterials were discussed. This review provided an overview of the relevant information on oxygen vacancy in cancer theranostics, and further promoted the development of cancer nanomedicine.

关键词： oxygen vacancy electron-hole pairs nanomedicine catalytic therapy cancer theranostics

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基于捕食性天敌资源的番茄潜叶蛾生物防控研究进展

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中国生物防治学报 2024年第4期40卷 727-738页

作者：罗涛涛阎姝彦曹梦宇张静航张桂芬万方浩张亚李涛刘双清张毅波湖南农业大学植物保护学院中国农业科学院植物保护研究所/农业病虫害综合治理国家重点实验室内蒙古自治区植保植检中心新疆生产建设兵团第十四师农业科学研究所

番茄潜叶蛾是一种世界范围的重大外来入侵物种，主要通过幼虫潜叶和蛀果危害番茄作物。自2017年入侵新疆伊犁以来，该虫已扩散蔓延至我国多个省份（直辖市和自治区），并在多地暴发成灾，严重威胁我国番茄产业的生产。基于捕食性天敌资... 详细信息

番茄潜叶蛾是一种世界范围的重大外来入侵物种，主要通过幼虫潜叶和蛀果危害番茄作物。自2017年入侵新疆伊犁以来，该虫已扩散蔓延至我国多个省份（直辖市和自治区），并在多地暴发成灾，严重威胁我国番茄产业的生产。基于捕食性天敌资源的生物防治是当前番茄潜叶蛾综合治理的主要手段之一。目前，关于番茄潜叶蛾捕食性天敌资源研究现状的综述性论文较少。据此，本文系统梳理了全球范围内的番茄潜叶蛾捕食性天敌资源种类，概括了捕食性天敌对番茄潜叶蛾的捕食能力、取食番茄潜叶蛾后捕食性天敌的生命参数、化学农药对捕食性天敌防控番茄潜叶蛾的影响，分析了当前利用捕食性天敌防治番茄潜叶蛾存在的问题和发展方向，以求为我国番茄潜叶蛾生物防治工作提供参考。

关键词：捕食性天敌生物防治番茄潜叶蛾

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Study on the Precise Location of the Xinjiang Yutian M_S7.3 Earthquake

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Earthquake Research in China 2015年第1期29卷 57-67页

作者： Zhan Xiaoyan Song Xiuqing Chen Xiangjun Wang Jun Miao Fajun liu shuangqing Zhu Yuanqing Earthquake Administration of Jiangsu Province Earthquake Administration of Shanghai Municipality Earthquake Administration of Xinjiang Uygur Autonomous Region Earthquake Administration of Tianjin Municipality

The seismic waveform of the Yutian Ms7. 3 earthquake, Xinjiang on February 12, 2014 was recorded clearly and completely by the Digital Seismic Networks of Xinjiang, Qinghai, Tibet, and Xinjiang Hotan array, so the method of joint location by regional seismic network and seismic array can be used to accurately determine the earthquake source location. The following technologies were used in the process of location：（ 1 ） We selected seismic stations equally located around the epicenter of the Ms 7. 3 earthquake with an average interval of about 15 degrees in the initial location. （2） The recording waveforms of Yutian seismic station were rotated to the radial and tangential directions to precisely obtain the arrival time of S-waves to determine the epicentral distance. （ 3） The velocity model was used in the determination of location of the epicenter, based on the historical records of earthquakes in the area within a radius of 1.0 ° from the source as the center, and the velocity model is obtained after re-fitting and calibration. （4） Based on the waveform records of the Hotan seismic array, the method of waveform beaming was used to determine the azimuths and perform the correction of the epicenter location with these azimuths. （5） The deterministic method was used to measure the source depth. Finally, it is concluded that the Yutian Ms 7. 3 main shock hypocenter location is 36. 197°N, 82. 467°E, focal depth 12km and original time 17：19：48. 2 μm. February 12, 2014.

关键词： Hypocentral location Digital seismic network Seismic array