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On the Blocking Flow patterns in the Euro–Atlantic Sector:A Simple Model Study

Advances in Atmospheric Sciences 2014年第5期31卷 1181-1196页

作者： lUO Dehai yao yao physical Oceanography laboratory College of Physical and Environmental OceanographyOcean University of China Key laboratory of Regional Climate-Environment for East Asia Chinese Academy of Science

The flow patterns of Euro-Atlantic blocking events in winter are investigated by dividing the sector into three sub- regions： 60°-30°W （Greenland region）; 20°W-30°E [eastern Atlantic-Europe （EAE） region]; and 50°-90°E （Ural region）. It is shown that blocking events in winter are extremely frequent in the three sub-regions. Composite 500-mb geopotential height fields for intense and long-lived blocking events demonstrate that the blocking fields over Greenland and Ural regions exhibit southwest-northeast （SW-NE） and southeast-northwest （SE-NW） oriented dipole-type patterns, respectively, while the composite field over the EAE region exhibits an Ω-type pattern. The type of composite blocking pattern seems to be related to the position of the blocking region relative to the positive center of the climatological stationary wave （CSW） anomaly existing near 10°W. The physical cause of why there are different composite blocking types in the three sub-regions is identified using a nonlinear multiscale interaction model. It is found that when the blocking event is in almost the same position as the positive CSW anomaly, the planetary-scale field can exhibit an Ω-type pattern due to the enhanced positive CSW anomaly. Neverthe- less, a SW-NE （SE-NW） oriented dipole-type block can occur due to the reduced positive CSW anomaly as it is farther in the west （east） of the positive CSW anomaly. The total fields of blocking in the three regions may exhibit a meandering flow comprised of several isolated anticyclonic and cyclonic vortices, which resembles the Berggren-Bolin-Rossby meandering jet type.

关键词： blocking flow pattern synoptic eddies nonlinear multiscale interaction climatological stationary wave anomaly

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Recent Rapid Decline of the Arctic Winter Sea Ice in the Barents–Kara Seas Owing to Combined Effects of the Ural Blocking and SST

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Journal of Meteorological Research 2018年第2期32卷 191-202页

作者： Binhe lUO yao yao physical Oceanography laboratory Qingdao Collaborative Innovation Center of Marine Science and TechnologyCollege of Oceanic and Atmospheric Sciences Ocean University of China Key laboratory of Regional Climate–Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of Sciences

This study investigates why the Arctic winter sea ice loss over the Barents–Kara Seas（BKS） is accelerated in the recent decade. We first divide 1979–2013 into two time periods： 1979–2000（p1） and 2001–13（p2）, with a focus on p2 and the difference between p1 and p2. The results show that during p2, the rapid decline of the sea ice over the BKS is related not only to the high sea surface temperature（SST） over the BKS, but also to the increased frequency,duration, and quasi-stationarity of the Ural blocking（UB） events. Observational analysis reveals that during p2, the UB tends to become quasi stationary and its frequency tends to increase due to the weakening（strengthening） of zonal winds over the Eurasia（North Atlantic） when the surface air temperature（SAT） anomaly over the BKS is positive probably because of the high SST. Strong downward infrared（IR） radiation is seen to occur together with the quasi-stationary and persistent UB because of the accumulation of more water vapor over the BKS. Such downward IR favors the sea ice decline over the BKS, although the high SST over the BKS plays a major role. But for p1, the UB becomes westward traveling due to the opposite distribution of zonal winds relative to p2, resulting in weak downward IR over the BKS. This may lead to a weak decline of the sea ice over the BKS. Thus, it is likely that the rapid decline of the sea ice over the BKS during p2 is attributed to the joint effects of the high SST over the BKS and the quasi-stationary and long-lived UB events.

关键词： Arctic sea ice rapid decline Ural blocking quasi stationary sea surface temperature(SST)

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青稞分蘖角度的QTl定位

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作物学报 2025年第1期51卷 260-272页

作者：杨景发余鑫莲姚有华姚晓华王蕾吴昆仑李新青海大学农林科学院/青海省作物分子育种重点实验室/青海省青稞遗传育种重点实验室/青藏高原种质资源研究与利用实验室/青海大学省部共建三江源生态与高原农牧业国家重点实验室青海西宁810016

分蘖角度是青稞株型的主要构成因素,在提高青稞产量与抗倒伏性中发挥着极为重要的作用。为解析青稞分蘖角度的遗传机制,本研究以青稞品种‘达章紫’(株型松散)和‘昆仑10号’(株型紧凑)为亲本构建的RIl群体为材料,基于高密度遗传图谱,... 详细信息

分蘖角度是青稞株型的主要构成因素,在提高青稞产量与抗倒伏性中发挥着极为重要的作用。为解析青稞分蘖角度的遗传机制,本研究以青稞品种‘达章紫’(株型松散)和‘昆仑10号’(株型紧凑)为亲本构建的RIl群体为材料,基于高密度遗传图谱,在多环境中进行青稞分蘖角度的QTl定位,并利用RIl群体衍生的剩余杂合系,对鉴定到的主效QTlqTA7H-1进行精细定位。在青稞7条染色体上共检测到9个控制分蘖角度的QTl,解释表型变异为6.41%~33.57%,其中,qTA3H-1和qTA7H-1为多环境共检测的主效QTl,平均加性效应分别为5.42°(增效)和-3.87°(减效);在减效QTl qTA7H-1初定位区间筛选到4个剩余杂合体,自交衍生F8:9近等基因系,在置信区间内加密设计14对分子标记对RHl群体极端单株进行检测,利用获得的5种交换类型单株,将qTA7H-1进一步界定在pC08(32,252,397)与pA10(41,790,765)约9.54Mb的物理区间内。本研究初步揭示调控青稞分蘖角度的遗传因子,为开展分蘖角度性状的遗传改良与分子设计育种奠定了基础。

关键词：青稞分蘖角度 QTl定位主效位点

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Mesoporous Carbon-Tin Nanocomposites as Anode Materials for li-ion Battery

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Journal of Materials Science & Technology 2008年第4期24卷 657-660页

作者： Z. W.Zhao Z.p.Guo p. yao H.K.liu Institute for Superconducting and Electronic Materials University of Wollongong NSW 2522 Australia ARC Centre of Excellence for Electromaterials Science University of Wollongong NSW 2522 Australia Centre for Analysis and Measurement Tianjin University Tianjin 300072 China

A new mesoporous carbon-tin （MC-Sn） nanocomposite has been successfully prepared via a two-step method. From the transmission electron microscopy （TEM） observations, the tin nanoparticles were decorated on the as-prepared mesoporous carbons. The mesoprous structure of the carbon can effectively buffer the volume changes during the li-Sn alloying and de-alloying cycles. The as-prepared MC/Sn nanocomposite electrodes exhibited extremely good cycling stability, with the specific capacity of Sn in the composite electrode calculated to be 959.7 mAh-g-1, which amounts to an impressive 90.9% of the theoretical value （990 mAh-g-1）. The reversible capacity after 200 cycles is 96.1% of the first cycle reversible capacity, i.e., the capacity fade rate is only 0.0195% per cycle, which is even better than that of commercial graphite-based anodes.

关键词： Mesoporous Carbon Tin Nanocomposites lithium ion battery

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Reinforcement learning based adaptive control for uncertain mechanical systems with asymptotic tracking

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Defence Technology（防务技术） 2024年第4期34卷 19-28页

作者： Xiang-long liang Zhi-kai yao yao-wen Ge Jian-yong yao School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing210094China College of Automation&College of Artificial Intelligence Nanjing University of Post and TelecommunicationNanjing210023China

This paper mainly focuses on the development of a learning-based controller for a class of uncertain mechanical systems modeled by the Euler-lagrange *** considered system can depict the behavior of a large class of engineering systems,such as vehicular systems,robot manipulators and *** these systems are often characterized by highly nonlinear characteristics,heavy modeling uncertainties and unknown perturbations,therefore,accurate-model-based nonlinear control approaches become *** by the challenge,a reinforcement learning(Rl)adaptive control methodology based on the actor-critic framework is investigated to compensate the uncertain mechanical *** approximation inaccuracies caused by Rl and the exogenous unknown disturbances are circumvented via a continuous robust integral of the sign of the error(RISE)control *** from a classical RISE control law,a tanh(·)function is utilized instead of a sign(·)function to acquire a more smooth control *** developed controller requires very little prior knowledge of the dynamic model,is robust to unknown dynamics and exogenous disturbances,and can achieve asymptotic output ***,co-simulations through ADAMS and MATlAB/Simulink on a three degrees-of-freedom(3-DOF)manipulator and experiments on a real-time electromechanical servo system are performed to verify the performance of the proposed approach.

关键词： Adaptive control Reinforcement learning Uncertain mechanical systems Asymptotic tracking

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Optimization of unit operations for microencapsulating ferrous fumarate during scale-up of double fortification of salt with iron and iodine

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Food Quality and Safety 2021年第4期5卷 336-343页

作者： Oluwasegun Modupe Kiruba Krishnaswamy yao Olive li levente l.Diosady School of Chemistry and Material Science Rochester Institute of TechnologyRochesterNYUSA Division of Food Systems and Bioengineering University of MissouriColumbiaM0USA Department of Nutrition&Food Science California State Polytechnic UniversityPomonaCAUSA Department of Chemical Engineering and Applied Chemistry University of TorontoTorontoOntarioCanada

Objectives:This study evaluates factors responsible for the floating of iron premix in double fortified salt(DFS),which initially affected the large-scale implementation of the salt fortification program in India,and provides solutions to the scale-up of the *** and Methods:To mitigate this time-sensitive scale-up ***,the iron premix samples were obtained from the industrial scale-up pilot studies in India,evaluated for the impact of the amount of coating material(5 per cent,7.5 per cent,and 10 per cent(in weight)),type of formulation(soy stearin,SEpIFIlM and hydroxypropyl methylcellulose),amount of titanium dioxide(25-35 per cent(in weight))used for color masking;Second,we studied the effect of change in the composition of the coating,from 10 per cent(in weight)soy stearin to a double coat with 5 per cent(in weight)hydroxypropyl methylcellulose and 5 per cent soy stearin or 10 per cent soy stearin and 1 per cent(in weight)lecithin mixture,on particle density,floating or sinking property of the iron premix,and on the stability of iodine in the ***:It was observed that the hydrophobic nature and the amount of soy stearin used for coating caused the floating *** double coating with 5 per cent hydroxypropyl methylcellulose and 5 per cent soy stearin was preferred because lecithin in soy stearin enhanced the moisture-aided adverse interaction between iron and ***-life storage studies proved over 80 per cent iodine retention after 12 months of storage in the DFS formulated with iron premix double-coated with hydroxypropyl methylcellulose and soy ***:This proffered solution enabled the full implementation of the double fortification program in India.

关键词： Salt fortification spray coating soy stearin hydroxypropyl methylcellulose iron deficiency

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CO on Cu{001}c(2 × 2)-pd Studied by High Resolution Electron Energy loss Spectroscopy

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Chinese physics letters 1991年第8期8卷 404-407页

作者： yao Jun lIU Guoliang lIU Fengqin lÜSihua WU Sicheng Synchrotron Radiation laboratory Institute of High Energy PhysicsAcademia SinicaBeijing 100039 Department of physics Yantai UniversityYan tai 264005 Department of physics Peking UniversityBeijing 100871 laboratory for Surface physics Academia SinicaBeijing 100080

The adsorption of CO on Cu{001}c(2 × 2)-pd surface has been studies by electron energy loss *** 240 K,CO molecules are linearly bonded on the top of pd atoms *** 135 K,CO adsorbed both on the top position of pd and Cu atoms which occupied preferably on pd top *** possible dissociative adsorption phase of CO,which exists at room temperature,has been discussed also.

关键词： spectroscopy adsorption adsorbed

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不同热处理蛋黄脂质对小鼠学习认知能力下降的缓解能力

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食品工业科技 2025年第1期46卷 367-376页

作者：吴瑶刘铭坤方冰张明合肥工业大学食品与生物工程学院安徽合肥230061 中国农业大学营养与健康系北京100083 北京工商大学食品与健康学院北京100048

为探讨不同温度处理下蛋黄脂质对小鼠学习认知能力下降的缓解能力的差异。本研究利用小鼠认知障碍模型,比较95℃(水浴30 min)和121℃(灭菌锅加热30 min)热处理蛋黄脂质组分改善小鼠学习认知能力的差异。研究结果表明,相较于121℃热处理... 详细信息

为探讨不同温度处理下蛋黄脂质对小鼠学习认知能力下降的缓解能力的差异。本研究利用小鼠认知障碍模型,比较95℃(水浴30 min)和121℃(灭菌锅加热30 min)热处理蛋黄脂质组分改善小鼠学习认知能力的差异。研究结果表明,相较于121℃热处理的蛋黄脂质,95℃热处理的蛋黄脂质更有效地降低了Tau蛋白的磷酸化和Aβ1-40、GSK-3β表达,下调了促炎因子的表达,其提升小鼠的学习记忆能力的效果更好。95℃热处理蛋黄脂质中的多不饱和脂肪酸以及DHA较121℃热处理的蛋黄脂质显著增加(p<0.05)。因此,过度的加热条件,会破坏蛋品中DHA等多不饱和脂肪酸,削弱蛋黄脂质的改善认知的生物活性。本研究为蛋制品的热加工工艺的优化提供参考依据。

关键词：蛋黄脂质热处理学习和记忆

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基于重复数据删除的分层存储优化技术研究进展

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计算机科学 2025年第1期52卷 120-130页

作者：姚子路付印金肖侬国防科技大学计算机学院长沙410073 中山大学国家超级计算广州中心广州510006

随着全球数据量的爆炸式增长以及数据多样性的日益丰富,单一介质层的存储系统逐渐不能满足用户多样化的应用需求。分层存储技术可依据数据的重要性、访问频率、安全性需求等特征将数据分类存放到具有不同访问延迟、存储容量、容错能力... 详细信息

随着全球数据量的爆炸式增长以及数据多样性的日益丰富,单一介质层的存储系统逐渐不能满足用户多样化的应用需求。分层存储技术可依据数据的重要性、访问频率、安全性需求等特征将数据分类存放到具有不同访问延迟、存储容量、容错能力的存储层中,已经在各个领域得到广泛应用。重复数据删除是一种面向大数据的缩减技术,可高效去除存储系统中的重复数据,最大化存储空间利用率。不同于单存储层场景,将重复数据删除技术运用于分层存储中,不仅能减少跨层数据冗余,进一步节省存储空间、降低存储成本,还能更好地提升数据I/O性能和存储设备的耐久性。在简要分析基于重复数据删除的分层存储技术的原理、流程和分类之后,从存储位置选择、重复内容识别和数据迁移操作3个关键步骤入手,深入总结了诸多优化方法的研究进展,并针对基于重复数据删除的分层存储技术潜在的技术挑战进行了深入探讨。最后展望了基于重复数据删除的分层存储技术的未来发展趋势。

关键词：重复数据删除分层存储存储位置选择重复内容识别数据迁移

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Radial integral boundary element method for simulating phase change problem with mushy zone

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Applied Mathematics and Mechanics(English Edition) 2021年第8期42卷 1155-1170页

作者： Hongxiao yao Weian yao Chong ZUO Xiaofei HU State Key laboratory of Structural Analysis for Industrial Equipment Dalian University of TechnologyDalian 116024Liaoning ProvinceChina International Center for Computational Mechanics Dalian University of TechnologyDalian 116024Liaoning ProvinceChina Sany Heavy Industry Co.ltd. Wuhan 430100China

A radial integral boundary element method(BEM)is used to simulate the phase change problem with a mushy zone in this *** phases,including the solid phase,the liquid phase,and the mushy zone,are considered in the phase change ***,according to the continuity conditions of temperature and its gradient on the liquid-mushy interface,the mushy zone and the liquid phase in the simulation can be considered as a whole part,namely,the non-solid phase,and the change of latent heat is approximated by heat source which is dependent on ***,the precise integration BEM is used to obtain the differential equations in the solid phase zone and the non-solid phase zone,***,an iterative predictor-corrector precise integration method(pIM)is needed to solve the differential equations and obtain the temperature field and the heat flux on the *** to an energy balance equation and the velocity of the interface between the solid phase and the mushy zone,the front-tracking method is used to track the move of the *** interface between the liquid phase and the mushy zone is obtained by interpolation of the temperature ***,four numerical examples are provided to assess the performance of the proposed numerical method.

关键词： phase change mushy zone boundary element method(BEM) precise integration method(pIM)

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