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Influence of Indian Ocean Dipole on Tropical Cyclone Activity over Western North Pacific in Boreal Autumn

Journal of Ocean University of China 2019年第4期18卷 795-802页

作者： ZHOU qun wei Lixin ZHANG Runyu National Marine Environmental Forecasting Center Ministry of Natural Resources Beijing 100081 China

In this study, we investigated the influence of the Indian Ocean Dipole (IOD) on the interannual variability of tropical cyclone (TC) activity over the western North Pacific (WNP) during autumn (September November) from 1961 2015. We found the number of TCs making landfall in China to be significantly negatively correlated with the IOD index, which can be attributed to shifts in the location of TC formation together with the abnormal steering flow at 500 hPa. During negative IOD autumns, TC genesis regions move obviously westward due to the westward retreat of the WNP monsoon trough. The TC activity is remarkably enhanced near South China coastal areas, which is due to a contiguous 500-hPa subtropical ridge. In contrast, during positive IOD autumns, TC genesis positions obviously shift eastward and more TCs tend to exhibit recurvature around 130 E or a westward path south of 15 N led by an equatorward movement of the 500-hPa subtropical ridge with a break near 125 E. In our examination of large-scale circula- tion, we found a pair of equator-symmetric anticyclones in the lower troposphere resulting from variations in the large-scale Walker circulation induced by the anomalous sea surface temperature (SST) associated with a positive IOD. The resulting Philippines anti- cyclonic anomalies are closely related to the variability of the monsoon trough over the WNP region. Furthermore, the variations in the steering flow can be explained by the suppressed (enhanced) convective activities around the Philippines and the weakened (strengthened) local meridional circulation over East Asia in positive (negative) IOD years.

关键词： IOD tropical cyclone activity western North Pacific monsoon trough

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Asymptotic Tracking Control for Wind Turbines in Variable Speed Mode

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IEEE/CAA Journal of Automatica Sinica 2017年第3期4卷 569-576页

作者： wei Lin Zongtao lu wei wei Dongguan University of Technology Dongguan 523808China Department of Electrical Engineering and Computer Science Case Western Reserve University

This paper presents a variable speed control strategy for wind turbines in order to capture maximum wind *** turbines are modeled as a two-mass drive-train system with generator torque *** on the obtained wind turbine model,variable speed control schemes are *** tracking controllers are designed to achieve asymptotic tracking for a prescribed rotor speed reference signal so as to yield maximum wind power *** to the difficulty of torsional angle measurement,an observer-based control scheme that uses only rotor speed information is further developed for global asymptotic output *** effectiveness of the proposed control methods is illustrated by simulation results.

关键词： Asymptotic tracking partial-state and output feedback two-mass drive-train model variable speed control wind turbines

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An experimental analysis of situation awareness for cockpit display interface evaluation based on flight simulation

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Chinese Journal of Aeronautics 2013年第4期26卷 884-889页

作者： wei Hengyang Zhuang Damin Wanyan Xiaoru Wang qun School of Aeronautic Science and Engineering Beihang University

Aircraft cockpit display interface （CDI） is one of the most important human-machine interfaces for information perceiving. During the process of aircraft design, situation awareness （SA） is frequently considered to improve the design, as the CDI must provide enough SA for the pilot to maintain the flight safety. In order to study the SA in the pilot-aircraft system, a cockpit flight simulation environment is built up, which includes a virtual instrument panel, a flight visual display and the corresponding control system. Based on the simulation environment, a human-in-the-loop experiment is designed to measure the SA by the situation awareness global assessment technique （SAGAT）. Through the experiment, the SA degrees and heart rate （HR） data of the subjects are obtained, and the SA levels under different CDI designs are analyzed. The results show that analyzing the SA can serve as an objective way to evaluate the design of CDI, which could be proved from the consistent HR data. With this method, evaluations of the CDI design are performed in the experimental flight simulation environment, and optimizations could be guided through the analysis.

关键词： Cockpit display interface Design evaluation Flight simulation Heart rate SAGAT Situation awareness

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A randomized, controlled, multicenter contraceptive efficacy clinical trial of the intravas device, a nonocclusive surgical male sterilization

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Asian Journal of Andrology 2014年第3期16卷 432-436页

作者： Wen-Hong lu Xiao-wei Liang Yi-qun Gu wei-Xiong Wu Li-wei Bo Tian-Gui Zheng Zhen-Wen Chen Key Laboratory of Male Reproductive Health National Health and Family Planning Commission National Research Institute for Family Planning and WHO Collaborating Centre for Research in Human Reproduction Beijing Institute for Family Planning of Guangzhou city Guangzhou Institute for Family Planning of Henan Province Zhengzhou Institute for Family Planning of Putian City Putian China.

Because of unavoidable complications of vasectomy, this study was undertaken to assess the efficacy and safety of male sterilization with a nonobstructive intravas device （IVD） implanted into the vas lumen by a mini-surgical method compared with no-scalpel vasectomy （NSV）. IVDs were categorized into two types： IVD-B has a tail used for fixing to the vas deferens （fixed wing） whereas IVD-A does not. A multicenter prospective randomized controlled clinical trial was conducted in China. The study was comprised of 1459 male volunteers seeking vasectomy who were randomly assigned to the IVD-A （n = 487）, IVD-B （n = 485） or NSV （n = 487） groups and underwent operation. Follow-up included visits at the 3rd-6TM and 12~ postoperative months, The assessments of the subjects involved regular physical examinations （including general and andrological examinations） and semen analysis. The subjects＇ partners also underwent monitoring for pregnancy by monthly interviews regarding menstruation and if necessary, urine tests, There were no significant differences in pregnancy rates （0.65% for IVD-A, 0 for IVD-B and 0.21% for NSV） among the three groups （P 〉 0.05）. The cumulative rates of complications at the 12th postoperative month were zero, 0.9% and 1.7% in the three groups, respectively. In conclusion, IVD male sterilization exhibits a low risk of long-term adverse events and was found to be effective as a male sterilization method, similar to the NSV technique. IVD male sterilization is expected to be a novel contraceptive method.

关键词： complication male sterilization nonobstructive intravas device no-scalpel vasectomy

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Procyanidin A_1 and its digestive products alleviate acrylamide-induced IPEC-J2 cell damage through regulating Keap1/Nrf2 pathway

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Food Science and Human Wellness 2024年第3期13卷 1475-1484页

作者： Fangfang Yan qun lu Chengming Wang Rui Liu College of Food Science and Technology Huazhong Agricultural UniversityWuhan 430070China Key Laboratory of Environment Correlative Dietology(Huazhong Agricultural University) Ministry of EducationWuhan 430070China Key Laboratory of Urban Agriculture in Central China Ministry of Agriculture and Rural AffairsWuhan 430070China

Our previous study has revealed that procyanidin A_(1)(A_(1))and its simulated digestive product(D-A,)can alleviate acrylamide(ACR)-induced intestine cell ***,the underlying mechanism remains *** this study,we elucidated the molecular mechanism for and D-A_(1) to alleviate ACR-stimulated IPEC-J2 cell *** slightly activated nuclear factor erythroid 2-related factor 2(Nrf2)signaling and its target genes,but this activation could not reduce intestine cell damage.A_(1) and D-A_(1) could alleviate ACR-induced cell damage,but the effect was abrogated in cells transiently transfected with Nrf2 small interfering RNA(siRNA).Further investigation confirmed that A_(1) and D-A_(1) interacted with Ketch-like ECH-associated protein 1(Keapl),which boosted the stabilization of Nrf2,subsequently promoted the translocation of Nrf2 into the nucleus,and further increased the expression of antioxidant proteins,thereby inhibiting glutathione(GSH)consumption,maintaining redox balance and eventually alleviating ACR-induced cell ***,there was no difference between A_(1) and D-A_(1) treated groups,indicating that A_(1) can tolerate gastrointestinal digestion and may be a potential compound to limit the toxicity of ACR.

关键词： Procyanidin A_1 Digestive products Acrylamide Nuclear factor erythroid 2-related factor 2(Nrf2) Intestinal cell damage

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Influence of the pace of El Nino decay on tropical cyclone frequency over the western north pacific during decaying El Nino summers

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Atmospheric and Oceanic Science Letters 2023年第3期16卷 39-45页

作者： qun Zhou Lixin wei National Marine Environmental Forecasting Center Ministry of Natural ResourcesBeijingChina

本文分析了El Nino事件衰减速度的差异对衰退年夏季西北太平洋热带气旋(tropical cyclone,TC)频数的不同影响。按照ElNiio事件衰减速度不同,将其划分为迅速衰减(rapid decaying,RD)和缓慢衰减(slowdecaying,SD)的El Nino事件.SD(RD)El N... 详细信息

本文分析了El Nino事件衰减速度的差异对衰退年夏季西北太平洋热带气旋(tropical cyclone,TC)频数的不同影响。按照ElNiio事件衰减速度不同,将其划分为迅速衰减(rapid decaying,RD)和缓慢衰减(slowdecaying,SD)的El Nino事件.SD(RD)El Nino事件的衰退年夏季,赤道中东太平洋海温仍维持正异常(衰减为负异常).与SD El Nino事件相比,RDElNino事件衰退年夏季西北太平洋TC频数显著减少.进一步的分析揭示了导致TC频数差异的大尺度环境要素,指出热带印度洋-太平洋海温异常密切相关的西北太平洋低层反气旋异常在其中起到了关键作用。

关键词： ElNino衰减速度热带气旋西北太平洋低层反气旋

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An Integrated Incentive Framework for Mobile Crowdsourced Sensing

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Tsinghua Science and Technology 2016年第2期21卷 146-156页

作者： wei Dai Yufeng Wang qun Jin Jianhua Ma College of Telecommunications and Information Engineering Nanjing University of Posts and TelecommunicationsNanjing 210003China. Department of Human Informatics and Cognitive Sciences Waseda UniversitySaitama 359-1192Japan. Faculty of Computer&Information Sciences Hosei UniversityTokyo 184-8584Japan

Currently, mobile devices （e.g., smartphones） are equipped with multiple wireless interfaces and rich builtin functional sensors that possess powerful computation and communication capabilities, and enable numerous Mobile Crowdsourced Sensing （MCS） applications. Generally, an MCS system is composed of three components： a publisher of sensing tasks, crowd participants who complete the crowdsourced tasks for some kinds of rewards, and the crowdsourcing platform that facilitates the interaction between publishers and crowd participants. Incentives are a fundamental issue in MCS. This paper proposes an integrated incentive framework for MCS, which appropriately utilizes three widely used incentive methods： reverse auction, gamification, and reputation updating. Firstly, a reverse-auction-based two-round participant selection mechanism is proposed to incentivize crowds to actively participate and provide high-quality sensing data. Secondly, in order to avoid untruthful publisher feedback about sensing-data quality, a gamification-based verification mechanism is designed to evaluate the truthfulness of the publisher＇s feedback. Finally, the platform updates the reputation of both participants and publishers based on their corresponding behaviors. This integrated incentive mechanism can motivate participants to provide high-quality sensed contents, stimulate publishers to give truthful feedback, and make the platform profitable.

关键词： mobile crowdsourced sensing incentive mechanism reverse auction gamification reputation updating

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Relationship between LTP and the nuclear protein induced by calcineurin

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Chinese Science Bulletin 1998年第16期43卷 1384-1387页

作者： Jie luo qun wei Beijing Normal Univ Dept Biol Biochem & Mol Biol Lab Beijing 100875 Peoples R China

Results demonstrate that calcineurin plays a role in long term potentiation (LTP) in the hippocampus. A 45 ku enzyme was administered, which exhibits Ca 2+/calmodulin independent activity to rats, and the protein components of nuclear extracts from the cell-free system of rat hippocampus were tested. It is found that the level of a component significantly increased in nuclear extracts following the activation of calcineurin. The concentration of the component in the nucleus is also markedly increased following hippocampal LTP elicited by ginsenosides. These results suggest that the activation of calcineurin induces a pre-existing protein component to translocate to the nucleus in the hippocampus. The nuclear translocation of the component may be required for LTP in the hippocampus.

关键词： calcineurin nuclear protein learning and memory long-term potentiation (LTP).

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The Principle and Progress of Dynamically Reconfigurable Computing Technologies

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Chinese Journal of Electronics 2020年第4期29卷 595-607页

作者： wei Shaojun lu Yan'an Institute of Microelectronics Tsinghua University

With the emergence of new applications and the increasing cost of new semiconductor manufacturing technology, high energy-efficiency and flexibility are both critical for *** reconfigurable computing architecture, which has the both characteristics, is one of the most promising architectures for future *** has shown notable advantages in many important application fields, compared to conventional ***, the fundamental reasons for the characteristics have never been deeply discussed in previous *** paper analyzes the reasons from the perspective of design *** technologies of dynamically reconfigurable computing are continually evolving, and some cheering results of application have been *** paper summarizes the latest progress in key technologies and provides an introduction of the application achievements.

关键词： Dynamically reconfigurable computing Principle Progress

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Carbon reduction potential and cost evaluation of different mitigation approaches in China’s coal to olefin Industry

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Journal of Environmental Sciences 2020年第4期32卷 352-363页

作者： qun Shen Xuehang Song Fang Mao Nannan Sun Xia Wen wei wei CAS Key Laboratory of Low-Carbon Conversion Science&Engineering Chinese Academy of SciencesShanghai201210PR China ShanghaiTech University 100 Haike RoadShanghai201210PR China Center for Excellence in Urban Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen361021PR China

Coal-based olefin(CTO)industry as a complement of traditional petrochemical industry plays vital role in China’s national economic ***,high CO2 emission in CTO industry is one of the fatal problems to hinder its *** this work,the carbon emission and mitigation potentials by different reduction pathways are *** economic cost is analyzed and compared as *** to the industry development plan,the carbon emissions from China’s CTO industry will attain 189.43 million ton C02(MtC02)and 314.11 MtC02 in 2020 and 2030,*** the advanced technology level,the maximal carbon mitigation potential could be attained to 15.3%and 21.9%in 2020 and *** the other optional mitigation ways are combined together,the carbon emission could further reduce to some *** general,the order of mitigation potential is followed as:feedstock alteration by natural gas>C02 hydrogenation with renewable electricity applied>CCS *** mitigation cost analysis indicates that on the basis of 2015 situation,the economic penalty for feedstock alteration is the lowest,ranged between 186 and 451 CNY/tCO2,and the cost from CCS technology is ranged between 404 and 562 CNY/tC02,which is acceptable if the C02 enhanced oil recovery and carbon tax are ***,for the C02 hydrogenation technology,the cost is extremely high and there is almost no application possibility at present.

关键词： Carbon emission China’S coal to Olefin industry Reduction potential Mitigation cost

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