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Road scene analysis for determination of road traffic density

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Frontiers of Computer Science 2014年第4期8卷 619-628页

作者： Omar AL-KADI Osama AL-KADI Rizik AL-SAYYED ja'far ALQATAWNA King Abdullah lI School for Information Technology University of Jordan Amman 11942 Jordan College of Engineering and Computer Science Australian National University Canberra ACT 0200 Australia

Road traffic density has always been a concern in large cities around the world, and many approaches were developed to assist in solving congestions related to slow traffic flow. This work proposes a congestion rate estimation approach that relies on real-time video scenes of road traffic, and was implemented and evaluated on eight different hotspots covering 33 different urban roads. The approach relies on road scene morphology for estimation of vehicles average speed along with measuring the overall video scenes randomness acting as a frame texture analysis indicator. Experimental results shows the feasibility of the proposed approach in reliably estimating traffic density and in providing an early warning to drivers on road conditions, thereby mitigating the negative effect of slow traffic flow on their daily lives.

关键词： road congestion image texture local binary pattern scene morphology

Identity（Re） Construction and the Sense of Belongingness among International Students in China:A Case Study of Zhejiang Normal University

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Identity（Re） Construction and the Sense of Belongingness a...

作者： ja ZIN 浙江师范大学

学位级别：硕士

Discussion about international students in China is a topic with a long history and different *** the development of the socio-economy of China,the number of international students in China grows faster than *** number of International Students coming to China is adhesively increasing,though summative with a lot of challenges faced during their studies and majorly accruing from ***,their life experiences and identity issues deserve more attention that it already hadIdentity is now defined as a self-concept,self-perception,both individual and social-cultural,and that may develop over time regarding to a group which they belong to,such as a particular student in Chinese *** is an individual’s sense of belonging to a group;this belonging offers a feeling of security and *** identity（re）construction is mostly shaped by both historical and cultural *** the theoretical framework combining social identity theory（Tajfel,1974）and Maslow’s（1943）theory of human motivation,this thesis investigated the identity construction and sense of belongingness of international students in Zhejiang Normal University as a case *** study utilized combining semi-structured interviews and a thematic analysis to examine the intercultural experiences of ten international students through their own *** themes were uncovered and further discussed on findings as the participants shared stories about the difficulties,they have been challenged with such as cultural misunderstanding,academic achievement,social acceptance,identity confusion,and other societal pressures and *** students encountered various problems in both their academic and social life.

关键词：国际学生归属感师范大学

A gameproblemofpursuit-evasionwith nth orderdifferentialequations describing players’dynamics

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Journal of Control and Decision 2022年第2期9卷 193-201页

作者： Abbas ja'afaru Badakaya Aminu Sulaiman Halliru jamilu Adamu Mathematial Sciences Bayero UniversityKanoNigeria Mathematics Federal University GashuaGashuaNigeria

In this paper,we study a pursuit-evasion differential game problem in the Hilbert space *** of countable number of pursuers and evader expressed as nth-order differential equa-tions with geometric constraints on the control functions of the *** game terminates at a given fixed time which is denoted by *** game's payoff is the infimum of the distances between the evader and pursuers at the time *** to the rule of the game,pursuers try to minimise the distance to the evader and the evader tries to maximises *** found value of the game and constructed players'optimal strategies.

关键词： Pursuit-evasion value of the game geometric constraints Hilbert space

Materials and devices for flexible and stretchable photodetectors and light-emitting diodes

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Nano Research 2021年第9期14卷 2919-2937页

作者： Jun-Kyul Song Min Sung Kim Seungwon Yoo ja Hoon Koo Dae-Hyeong Kim Center for Nanoparticle Research Institute for Basic Science(IBS)Seoul 08826Republic of Korea School of Chemical and Biological Engineering and Institute of Chemical Processes Seoul National UniversitySeoul 08826Republic of Korea Interdisciplinary Program for Bioengineering Seoul National UniversitySeoul 08826Republic of Korea Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea

Recently,significant efforts have been directed at overcoming the limitations of conventional rigid optoelectronic devices,particularly their poor mechanical stability under bending,folding,and stretching *** of major approaches for rendering optoelectronic devices mechanically deformable is to replace the conventional electronic/optoelectronic materials with functional nanomaterials or organic materials that are intrinsically flexible/***,advanced device designs and unconventional fabrication methods have also contributed to the development of soft optoelectronic ***,new devices such as bio-inspired curved image sensors,wearable light emitting devices,and deformable bio-integrated optoelectronic devices have been *** this review,recent progress in the development of soft optoelectronic materials and devices is ***,various materials such as nanomaterials,organic materials,and their hybrids that are suitable for developing deformable photodetectors,are ***,the nanomaterials and organic/polymeric materials that are applicable in deformable light-emitting diodes are ***,representative system-level applications of flexible and stretchable photodetectors and light-emitting diodes are reviewed,and future prospects are discussed.

关键词： nanomaterial organic material photodetector light-emitting diode flexible optoelectronics stretchable optoelectronics

Operational Implementation of the ATOVS Processing Procedure in KMA and Its Validation

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Advances in Atmospheric Sciences 2003年第3期20卷 398-414页

作者： Myoung-Hwan AHN Mee-ja KIM Chu-Yong CHUNG Ae-Sook SUH RemoteSensing Research Laboratory/Meteorological Research Institute RemoteSensing Research Laboratory/Meteorological Research InstituteRemoteSensing Research Laboratory/Meteorological Research InstituteRemoteSensing Research Laboratory/Meteorological Research Institute Seoul 156-720KoreaSeoul 156-720KoreaSeoul 156-720KoreaSeoul 156-720Korea

The Korea Meteorological Administration (KMA) has processed the data from the advanced TOVS (ATOVS) onboard NOAA-16 satellite since May 2001. The operational production utilizes the AAPP (ATOVS and AVHRR Processing Package) of EUMETSAT and IAPP (International ATOVS Processing Package) of the University of Wisconsin. For the initial guess profiles, the predicted fields (usually 6 to 12 hour forecasted fields) from the global aviation model of NOAA/NCEP are used. The average number of profiles retrieved from the ATOVS data is about 1,300 for each morning and afternoon orbit at about 18 and 06 UTC, respectively. The retrieved temperature and dew point temperatures are provided to forecasters in real time and used for initialization of prediction models. With the advanced microwave sensor (AMSU; Advanced Microwave Sounding Unit), accuracy of the ATOVS products is expected to be better than that of the TOVS products, especially in cloudy conditions. Indeed, the preliminary results from a validation study with the collocated radiosonde data during a 8-month period, from May to December 2001, for the East Asia region show an improved accuracy of the ATOVS products for cloudy skies versus the TOVS, especially for higher altitudes. The RMS (Root Mean Square) difference between the ATOVS products and radiosonde data is about 1.3°C for both clear and cloudy conditions, except for near the ground and at higher altitudes, at around 200 hPa. There is no significant temporal variation of the error statistics at all pressure levels. In case of the water vapor mixing ratio, the largest difference is shown at lower altitudes, while the accuracy is much better for the clear sky cases than the cloudy sky cases. The bias and RMSE at lower altitudes is about 0.557 g kg−1 and 2.5 g kg−1 and decrease significantly with increasing altitude.

关键词： ATOVS Processing and validation temperature and humidity profiles

Lactic Acid Fermentation from Coffee Ground Waste Hydrolysate by Lactobacillus rhamnosus

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Journal of Renewable Materials 2019年第4期7卷 365-372页

作者： ja-Ryong Koo Hye Min Park Se Kyung Kim Hyun Shik Yun Department of Biological Engineering Inha UniversityIncheon 22212Korea Institute of Industrial Biotechnology Inha University Research and Business FoundationIncheon 22212Korea

Lactic acid is an important organic acid that is widely used in the food,pharmaceutical,and cosmetic *** acid was produced from coffee ground waste which contains fermentable sugars and is increasingly generated from our daily dietary *** 114 strains of Lactobacillus species,Lactobacillus rhamnosus ATCC 10863 was selected for the production of lactic acid from coffee ground *** alkali pretreatment and saccharification,cellulose and hemicellulose in coffee ground waste were converted into fermentable *** experiments were conducted at various alkali solution,concentrations,and *** pretreatment with 35 g/L of KOH at 121oC for 60 min,the highest concentration of fermentable sugars was *** optimum concentration of Viscozyme L was 2%when saccharification was proceeded at 55oC for 7 *** productivity of lactic acid fermentation was the highest(0.59 g/L/h)at 100 g of coffee ground waste(1x concentration),whereas the lactic acid concentration was the highest at 600 g of coffee ground waste(6x concentration).As the concentration of coffee ground increased,the lactic acid concentration was also increased,however,the amount was not proportional to the coffee ground waste *** this study,it was found that coffee ground waste could be used as a culture medium for Lactobacillus rhamnosus ATCC 10863 through pretreatment and saccharification for the production of lactic acid.

关键词： Coffee ground waste Lactobacillus rhamnosus lactic acid fermentable sugars saccharification alkali pretreatment

Genome-wide markers for seed yield and disease resistance in perennial ryegrass

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The Crop Journal 2022年第2期10卷 508-514页

作者： Kristina jaškune Vilma Kemešyte Andrius Aleliūnas Grazina Statkeviciute Institute of Agriculture Lithuanian Research Centre for Agriculture and Forestry(LAMMC)Instituto av.1Akademija LT-58344Lithuania

The market success of perennial ryegrass(Lolium perenne L.) cultivars depends on sufficient seed production, as they are propagated by seed. However, breeding for high quality forage production reduces seed yield, and breaking the negative correlation would help to overcome the problem. The foliar disease crown rust is another factor affecting reproductive capacity and thereby seed yield. We evaluated seed yield-related traits and resistance to crown rust in a collection of commercial cultivars and ecotypes of perennial ryegrass and identified genome-wide markers associated with the traits. The study revealed high variation between the ecotype and cultivar groups as well as between years. A genome-wide association study identified 17 DNA single-nucleotide polymorphisms(SNPs) of which eight were associated with crown rust and nine with flag-leaf length. The SNP markers were located within or near predicted genes functioning in defense against pathogens. The identified genes are strong candidates for a further in-depth functional study to continue unravel determination of leaf architecture and crown rust resistance in perennial ryegrass.

关键词： Crown rust Puccinia coronata f.sp.lolli Flag-leaf length Genome-wide association study(GWAS) Seed yield Lolium perenne L.

电力工业互联网下的新能源场站面临的威胁和解决方案探析

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水电站机电技术 2024年第6期47卷 121-125页

作者：牛国智曾佳佳谭振国五凌电力有限公司新能源分公司湖南长沙410029

近年来,随着我国新能源产业的快速发展,许多电力企业已经开始转向风电、光伏发电等新能源方向,并正在改变其能源结构,同时也给监控和数据采集(SCADA)系统带来了巨大的网络安全风险。基于物联网的新能源场站是关键的基础设施,具有复杂的... 详细信息

近年来,随着我国新能源产业的快速发展,许多电力企业已经开始转向风电、光伏发电等新能源方向,并正在改变其能源结构,同时也给监控和数据采集(SCADA)系统带来了巨大的网络安全风险。基于物联网的新能源场站是关键的基础设施,具有复杂的架构并包含关键设备。其通信系统通信的机密性、完整性或可用性被破坏时,可能导致国家安全受损、公共秩序混乱、生命财产遭受重大损失。本文基于物联网的新能源场站面临的威胁和潜在解决方案,分析了电力工业互联网下的新能源场站的现状及漏洞,提出了新能源场站抵御攻击策略,并深入了解新能源场站的网络安全态势,旨在解决潜在组件的漏洞,检测恶意活动,增强网络安全性,保护客户隐私。

关键词：电力新能源场站网络安全物联网

1,6-Asymmetric induction: a higher enantioselective synthesis of γ-butyrolactone

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Chinese Journal of Chemistry 1991年第6期9卷 543-546页

作者： DING Yu LI ja-Yao WANG Lai-Xi Shanghai Institute of Organic Chemistry The Chinese Academy of SciencesShanghat 200032

A novel 1,6-asymmetric induction has been observed in the iodolactonization of γ,δ-unsa- turated amides. The optically active γ-butyrolactone was synthesized by employing iodolactonization reaction as a key step.

关键词： a higher enantioselective synthesis of Asymmetric induction butyrolactone