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Anti-Phase Relationship Between the East Asian Winter Monsoon and Summer Monsoon During the Holocene?

Journal of Ocean University of China 2017年第2期16卷 175-183页

作者： GE Qian xue zuo YAO Zhigang ZANG Zhengchen CHU Fengyou Second Institute of Oceanography State Oceanic AdministrationHangzhou 310012P.R.China Key Laboratory of Submarine Geosciences State Oceanic AdministrationHangzhou 310012P.R.China Department of Oceanography and Coastal Sciences Louisiana State UniversityBaton RougeLA 70803USA Center for Computation and Technology Louisiana State UniversityBaton RougeLA 70803USA Coastal Studies Institute Louisiana State UniversityBaton RougeLA 70803USA Key Laboratory of Physical Oceanography Ocean University of ChinaQingdao 266100P.R.China

The relationship between the East Asian winter monsoon(EAWM) and East Asian summer monsoon(EASM) during the Holocene is complicated and remains *** this study,analysis of grain size and benthic foraminiferal oxygen isotope,as well as accelerator mass spectrometry ^(14)C dating was performed on a sediment core retrieved from the newly revealed muddy deposit on the northern South China Sea continental *** history of the EAWM and EASM were reconstructed for the last 8200 a *** analysis in conjunction with previously published paleo-climate proxies revealed that the relationship between the EAWM and EASM during the Holocene is more complex than a simple and strict anti-phase one-both negative and positive correlations were *** EAWM and EASM are negatively correlated around 7500,4800,4200,3200,and 300 a BP(cooling periods),while positively correlated around 7100,3700,and 2100 a BP(warm periods).In particular,both the EAWM and EASM intensified during the three positive correlation ***,we also found that the relationship between these two sub-monsoons is anti-phase during the final phase of particularly hot periods like Holocene Optimum and Medieval warm *** possible impact from variations of solar irradiance on the relationship between the EAWM and EASM was also discussed.

关键词： grain size oxygen isotope South China Sea East Asian winter monsoon East Asian summer monsoon Holocene

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Chaotic characteristics and attractor evolution of friction noise during friction process

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Friction 2018年第1期6卷 47-61页

作者： Cong DING Hua ZHU Guodong SUN Yuankai ZHOU xue zuo School of Mechatronic Engineering China University of Mining and Technology School of Mechanical Engineering Jiangsu University of Science and Technology Jiangsu Provincial Key Laboratory of Advanced Manufacturing for Marine Mechanical Equipment Jiangsu University of Science and Technology

Friction experiments are conducted on a ring-on-disk tribometer, and friction noise produced during the friction process is extracted by a microphone. The phase trajectory and chaotic parameters of friction noise are obtained by phase-space reconstruction, and its attractor evolution is analyzed. The results indicate that the friction noise is chaotic because the largest Lyapunov exponent is positive. The phase trajectory of the friction noise follows a "convergence-stability-divergence" pattern during the friction process. The friction noise attractor begins forming in the running-in process, and the correlation dimension D increases gradually. In the stable process, the attractor remains steady, and D is stable. In the last step of the process, the attractor gradually disappears, and D decreases. The friction noise attractor is a chaotic attractor. Knowledge of the dynamic evolution of this attractor can help identify wear state changes from the running-in process to the steady and increasing friction processes.

关键词： friction noise phase trajectory chaotic parameters Lyapunov exponent chaotic attractor

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Dispersal of the Zhujiang River(Pearl River) derived sediment in the Holocene

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Acta Oceanologica Sinica 2014年第8期33卷 1-9页

作者： GE Qian LIU J.P. xue zuo CHU Fengyou Key Laboratory of Submarine Geosciences State Oceanic AdministrationSecond Institute of OceanographyState Oceanic Administration Department of Marine Earth and Atmospheric SciencesNorth Carolina State UniversityRaleighNC 27695USA

High-resolution Chirp profiling and coring reveals an elongated （ca. 400 km） Holocene Zhujiang River （Pearl River）-derived mud area （maximum thickness 〉 20 m） extending from the Zhujiang River Delta, southwest-ward off the Guangdong coast, to the Leizhou Peninsula. Two depo-centers, one proximal and one distal, are identified. On the continental shelf off the west Guangdong Province, the mud is deposited in water depth shallower than 50 m; while to the southeast of the Zhujiang River Estuary, the mud area can extend to the -120 m isobath. A combined analysis with the stratigraphic sequences of other muddy deposits in the West-ern Pacific marginal seas （mainly Changjiang （Yangtze） and Huanghe （Yellow） Rivers derived） indicates that the initiation of the Zhujiang River muddy deposit can be further divided into two stages： Stage 1 is before the mid-Holocene sea-level highstand （ca. 7.0 cal. ka BP）, the proximal mud was mostly deposited after 9.0 cal. ka BP, when the sea-level rose slowly after the Meltwater Pulse -1C; Stage 2, after the mid-Holocene sea-level highstand, clinoform developed on the continental shelf off the west Guangdong Province, extending ca. 400 km from the Zhujiang River Estuary. The proximal clinoform thins offshore, from ca. 10 m thickness around 5-10 m water depth to less than 1-2 m around 20-30 m water depth. In addition, we also find a de-veloped distal clinoform in the east of the Leizhou Peninsula.

关键词： South China Sea Zhujiang River mud clinoform

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Controlled Remote State Preparation

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Communications in Theoretical Physics 2009年第8期52卷 235-240页

作者： WANG Zhang-Yin LIU Yi-Min zuo xue-Qin ZHANG Zhan-Jun School of Physics ＆ Material Science Anhui University Hefei 230039 China Department of Physics Shaoguan University Shaoguan 512005 China

We present a scheme for remotely preparing a state via the controls of many agents in a *** thescheme,the agents' controls are achieved by utilizing quantum key ***,the original state can berestored by the receiver wi... 详细信息

关键词： controlled remote state preparation quantum key distribution single-qubit von Neumann orthogonal measurement controlled-NOT gate

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Statistical Downscaling of IPCC Sea Surface Wind and Wind Energy Predictions for U.S. East Coastal Ocean, Gulf of Mexico and Caribbean Sea

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Journal of Ocean University of China 2016年第4期15卷 577-582页

作者： YAO Zhigang xue zuo HE Ruoying BAO Xianwen SONG Jun Key Laboratory of Physical Oceanography Ocean University of China Qingdao 266071 P. R. China Department of Marine Earth and Atmospheric Sciences North Carolina State University Raleigh NC 27695 USA Department of Oceanography and Coastal Sciences Louisiana State University Baton Rouge 70803 USA National Marine Data and Information Service Tianjin 300171 P. R. China

A multivariate statistical downscaling method is developed to produce regional, high-resolution, coastal surface wind fields based on the IPCC global model predictions for the U.S. east coastal ocean, the Gulf of Mexico(GOM), and the Caribbean Sea. The statistical relationship is built upon linear regressions between the empirical orthogonal function(EOF) spaces of a cross- calibrated, multi-platform, multi-instrument ocean surface wind velocity dataset(predictand) and the global NCEP wind reanalysis(predictor) over a 10 year period from 2000 to 2009. The statistical relationship is validated before applications and its effectiveness is confirmed by the good agreement between downscaled wind fields based on the NCEP reanalysis and in-situ surface wind measured at 16 National Data Buoy Center(NDBC) buoys in the U.S. east coastal ocean and the GOM during 1992–1999. The predictand-predictor relationship is applied to IPCC GFDL model output(2.0?×2.5?) of downscaled coastal wind at 0.25?×0.25? resolution. The temporal and spatial variability of future predicted wind speeds and wind energy potential over the study region are further quantified. It is shown that wind speed and power would significantly be reduced in the high CO_2 climate scenario offshore of the mid-Atlantic and northeast U.S., with the speed falling to one quarter of its original value.

关键词： scenarios coastal ocean reanalysis Atlantic northeast multivariate Mexico quarter calibrated

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Climate Projections of Spatial Variations in Coastal Storm Surges Along the Gulf of Mexico and *** Coast

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Journal of Ocean University of China 2017年第1期16卷 1-7页

作者： YAO Zhigang xue zuo HE Ruoying BAO Xianwen XIE Jun GE Qian Key Laboratory of Physical Oceanography Ocean University of ChinaQingdao 266100P.R.China Department of Marine Earth and Atmospheric SciencesNorth Carolina State UniversityRaleighNC 27695USA Department of Oceanography and Coastal Sciences Louisiana State UniversityBaton Rouge 70803USA Center for Computation and Technology Louisiana State UniversityBaton Rouge 70803USA Coastal Studies Institute Louisiana State UniversityBaton Rouge 70803USA College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100P.R.China Second Institute of Oceanography State Oceanic AdministrationHangzhou 310012P.R.China

Using statistically downscaled atmospheric forcing, we performed a numerical investigation to evaluate future climate's impact on storm surges along the Gulf of Mexico and U.S. east coast. The focus is on the impact of climatic changes in wind pattern and surface pressure while neglecting sea level rise and other factors. We adapted the regional ocean model system(ROMS) to the study region with a mesh grid size of 7–10 km in horizontal and 18 vertical layers. The model was validated by a hindcast of the coastal sea levels in the winter of 2008. Model's robustness was confirmed by the good agreement between model-simulated and observed sea levels at 37 tidal gages. Two 10-year forecasts, one for the IPCC Pre-Industry(PI) and the other for the A1 FI scenario, were conducted. The differences in model-simulated surge heights under the two climate scenarios were analyzed. We identified three types of responses in extreme surge heights to future climate: a clear decrease in Middle Atlantic Bight, an increase in the western Gulf of Mexico, and non-significant response for the remaining area. Such spatial pattern is also consistent with previous projections of sea surface winds and ocean wave heights.

关键词： storm surge sea surface winds climate change regional ocean

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联合全基因组关联和转录组分析筛选玉米拟轮枝镰孢穗腐病的抗性候选基因

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作物学报 2024年第9期50卷 2279-2296页

作者：叶靓朱叶琳裴琳婧张思颖左雪倩李正真刘芳谭静云南大学农学院云南昆明650500

玉米是我国第一大粮食作物,实现玉米的高产稳产对于我国粮食安全、农业稳定有重要意义。穗腐病是一种严重危害全球玉米的真菌性病害,会造成玉米大幅减产和品质劣变。本研究选用我国玉米穗腐病的优势致病菌拟轮枝镰孢(Fusariumverticilli... 详细信息

玉米是我国第一大粮食作物,实现玉米的高产稳产对于我国粮食安全、农业稳定有重要意义。穗腐病是一种严重危害全球玉米的真菌性病害,会造成玉米大幅减产和品质劣变。本研究选用我国玉米穗腐病的优势致病菌拟轮枝镰孢(Fusariumverticillioides),对241份来源广泛的玉米自交系进行2年田间人工接种抗性鉴定,同时利用20,586个高质量SNP标记通过全基因组关联分析(genome-wideassociationstudy,GWAS),鉴定拟轮枝镰孢穗腐病抗性显著关联的SNP位点;在此基础上选取对拟轮枝镰孢穗腐病表现高抗和高感的玉米自交系各1份,其籽粒在室内接种拟轮枝镰孢,通过对3个不同侵染时间的籽粒进行转录组测序(RNA-seq),分析抗感材料差异表达基因(differentiallyexpressedgenes,DEGs)及其富集情况;结合GWAS和RNA-seq结果,共同定位筛选抗病候选基因。主要研究结果如下:(1)综合2年田间抗性鉴定结果,筛选到4份抗拟轮枝镰孢穗腐病的玉米自交系,其中含有热带血缘的玉米种质对拟轮枝镰孢穗腐病表现出更好的抗性。(2)2年GWAS分析共检测到26个与拟轮枝镰孢穗腐病抗性显著关联的SNP位点,其中有18个位点位于前人定位到的QTL范围内。(3) RNA-seq结果表明,抗感材料对病原菌的响应基因不同。与感病材料相比,抗病材料均显示出更多的DEGs,且都有更多的上调基因;在抗感材料特异性DEGs共同富集的GO条目和KEGG通路中,抗病材料中富集到的DEGs占比显著多于感病材料;一些与植物防御病原菌相关的条目和通路也仅在抗病材料中被特异富集。(4)在GWAS检测到的显著关联位点上下游100 kb范围内筛选与转录组DEGs共同定位到的候选基因,结果 16个基因被GWAS和RNA-seq同时检测到;根据这些基因的蛋白功能及相关文献报道,从中预测到6个与拟轮枝镰孢穗腐病抗性相关的候选基因。综上所述,本研究筛选出4份抗拟轮枝镰孢穗腐病的玉米自交系,来自热带、亚热带的玉米种质可以作为抗逆性品种选育的研究重点;对抗感玉米自交系响应拟轮枝镰孢侵染的DEGs及其相关抗病机制进行了初步解析,联合GWAS和RNA-seq共定位到6个与拟轮枝镰孢穗腐病抗性相关的候选基因,研究结果为玉米穗腐病抗性基因的克隆验证与抗性品种的培育提供了一定的理论依据。

关键词：玉米穗腐病拟轮枝镰孢关联分析转录组分析抗性种质候选基因

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Effect of New Dayuan powder on methicillin-resistant Staphylococcus aureus biofilms in vitro

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Journal of Traditional Chinese Medicine 2019年第6期39卷 794-799页

作者： Zhu Li Liu Chang zuo xue Fu Zheng Wang Yinghui Wang Yi Qi Wensheng Guang'anmen Hospital Beijing University of Chinese MedicineBeijing 100029China Department of Emergency Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijing 100053China Experimental Research Center China Academy of Chinese Medical SciencesBeijing 100700China 不详

OBJECTIVE:To observe the effects of New Dayuan powder(NDYP)on Methicillin-resistant Staphylococcus aureus(MRSA)biofilms and the embedded bacteria in ***:2,3-Bis-(2-methoxy-4-nitro-5-sulfophenyl)-2 H-tetrazolium-5-carboxanilide(XTT)assays were used to study the effects of NDYP on developing MRSA biofilms:100μL of bacterial culture and100μL drug solution were added to wells of96-well *** 24 h of incubation,the plates were washed and XTT-phenazine methyl sulfate(PMS)was added to enable counting of the number of live bacteria in biofilms using a microplate *** assays were also used to explore the effects of NDYP on mature MRSA biofilms:100μL of bacterial culture were added to wells of 96-well *** were cultured in the plates for 24 h,and then drug solution was *** plates were cultured for another 24 h,and then XTT-PMS was added to detect the number of live bacteria in the *** electron microscopy(SEM)was used to observe the effects of NDYP on mature MRSA biofilms:washed and sterilized glass coverslips were added to 24-well *** culture was *** 24 h of incubation,drug solution was *** another 24 h of incubation,the samples were observed by ***:XTT assays showed that the number of live bacteria in both developing and mature MRSA biofilms decreased significantly(P<0.01)after the administration of *** images showed that NDYP could destroy the structure of the bacteria and resulted in uneven thickness of MRSA ***:In vitro,NDYP has obvious inhibitory effects on the formation of MRSA biofilms and on mature biofilms.

关键词： Methicillin-resistant Staphylococcus aureus Biofilms In vitro techniques New Dayuan powder

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非全日制专业硕士校外实践基地建设思考与探索

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教育教学论坛 2024年第4期 100-103页

作者：王天博荆浩李作学曹阳华沈阳航空航天大学经济与管理学院辽宁沈阳110136

在国家深化研究生教育改革的新形势下,传统非全日制专业学位硕士实践教学模式存在一定的局限性。为了适应学生培养方式及学校特色的发展,需要在剖析现有问题的基础上,探索面向校企深度融合建设校外实践基地培养非全日制工程硕士的新模... 详细信息

在国家深化研究生教育改革的新形势下,传统非全日制专业学位硕士实践教学模式存在一定的局限性。为了适应学生培养方式及学校特色的发展,需要在剖析现有问题的基础上,探索面向校企深度融合建设校外实践基地培养非全日制工程硕士的新模式。通过对现有非全日制硕士实践基地建设中存在的问题进行深入剖析,以校外实践基地构建为目标,从校企深度融合的长效机制、基地合作模式、考核方式等方面思考和探索培养方法,并以此为契机,考虑通过校企深度融合,实现企业与学校的优势互补,以项目为驱动,以实践带动,优化资源配置。推进以协同育人为宗旨,以社会需求为引领,以学科专业为核心,以提高应用型人才实践能力与综合素质为导向的非全日制专业硕士研究生培养。

关键词：非全日制专业硕士实践基地建设校企深度合作

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Increasing operational stability of journal bearing in hydraulic suspension micro-pump by herringbone grooved structure

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Science China(Technological Sciences) 2024年第3期67卷 853-862页

作者： HONG Tao XING GuanYing zuo HuaiYu xue Song LUO XiaoBing State Key Laboratory of Coal Combustion School of Energy and Power EngineeringHuazhong University of Science and TechnologyWuhan 430074China

The operational stability of radial journal bearings is the bottleneck that limits the reliability of hydraulic suspension micropump. Due to self-excited vibrations, the whirl amplitude of the plain journal bearing(PJB) is large at high rotational speeds,which will accelerate wear failure. It has been proven that employing herringbone grooved journal bearing(HGJB) is an effective method to reduce the whirl amplitude and improve operational stability. However, enhancing the stability of journal bearings in micro-pumps by herringbone grooved structures has rarely been studied, and its effect needs to be verified. We validated the mechanism of the stability improvement with the CFD method and compared the dynamic characteristics of HGJB and PJB by rotor dynamics evaluation and experiment. The experimental results show that under the same conditions the whirl amplitude of the HGJB decreases by 29.61% in the x direction and by 24.09% in the y direction compared with that of the PJB. This study reveals the effect of the herringbone grooved structure on the operational stability of bearings and may provide guidance for the reliability improvement of hydraulic suspension micro-pump.

关键词： journal bearing herringbone groove hydrodynamic effect micro-pump

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