期刊文献+
共找到7,866篇文章
< 1 2 250 >
每页显示 20 50 100
A detailed rock density model of the Hong Kong territories
1
作者 Albertini Nsiah Ababio Robert Tenzer 《Geodesy and Geodynamics》 EI CSCD 2024年第1期75-81,共7页
We used the geological map and published rock density measurements to compile the digital rock density model for the Hong Kong territories.We then estimated the average density for the whole territory.According to our... We used the geological map and published rock density measurements to compile the digital rock density model for the Hong Kong territories.We then estimated the average density for the whole territory.According to our result,the rock density values in Hong Kong vary from 2101 to 2681 kg·m^(-3).These density values are typically smaller than the average density of 2670 kg·m^(-3),often adopted to represent the average density of the upper continental crust in physical geodesy and gravimetric geophysics applications.This finding reflects that the geological configuration in Hong Kong is mainly formed by light volcanic formations and lava flows with overlying sedimentary deposits at many locations,while the percentage of heavier metamorphic rocks is very low(less than 1%).This product will improve the accuracy of a detailed geoid model and orthometric heights. 展开更多
关键词 Density model Rock types Gravimetric modeling hong kong
原文传递
A Comparative Study of the L2 Pragmatic Competence of University Students in Hong Kong and the Chinese Mainland:The Contributions of Sociocultural Context and Linguistic Proficiency
2
作者 Scott AUBREY Rod ELLIS 《Chinese Journal of Applied Linguistics》 2024年第3期371-392,524,共23页
This study investigates the differences in pragmatic competence between Hong Kong and Chinese mainland university students.Participants included 19 native speakers of English,115 Chinese mainland students,divided into... This study investigates the differences in pragmatic competence between Hong Kong and Chinese mainland university students.Participants included 19 native speakers of English,115 Chinese mainland students,divided into those who had spent time abroad in an English-speaking country(CM A)and those who had not(CM NA),and 97 Hong Kong students,divided into those from an English-medium secondary school(Hong Kong EMI)and those from a Chinese-medium school(Hong Kong CMI).Linguistic proficiency was measured by a C-test,and pragmatic competence by a Metapragmatic Knowledge Test,an Irony Test and a Monologic Role Play.Group scores were compared using ANCOVAs to control for differences in proficiency.The results point to a continuum of pragmatic competence—EMI>CMI>CM A>CM NA—reflecting the groups’access to English in real-life contexts.The differences between the Hong Kong groups and the Chinese mainland groups were clearest in those tests measuring processing capacity(i.e.,Irony Response Time and the Monologic Role Play).CM A,but not CM NA,performed as well as the Hong Kong groups on measures of metapragmatic awareness.The results are discussed in terms of Bialystok’s(1993)distinction between analyzed representation and control of processing. 展开更多
关键词 pragmatic competence social context hong kong the Chinese mainland metapragmatic knowledge processing capacity
下载PDF
Using Five Music Instructional Methods to Illustrate the Social Constructive Music Teaching Framework in Hong Kong Primary Level Music Education
3
作者 Lam Wing Yin 《Sino-US English Teaching》 2024年第6期247-269,共23页
Music education under the frame name of arts education has been integrated into the primary and secondary education curriculums in Hong Kong for more than 20 years,starting from 2001,the year of launching the Learning... Music education under the frame name of arts education has been integrated into the primary and secondary education curriculums in Hong Kong for more than 20 years,starting from 2001,the year of launching the Learning to Learn curriculum for the reconstruction of the education system for the younger generation.Music education,embedded into the arts education,was therefore regarded as one of the key subjects to cultivate and uplift student holistic development,focusing on aesthetic skill training and moral growth development.This research was an exploration study of music teaching practices from two private international and two general public school music teachers at the primary school level.The value of this study rested on borrowing the idea of Shulman’s pedagogical content knowledge(PCK)principle to create a social constructivist music teaching framework from five commonly-used instructional methods,namely,Orff,Kodaly,Dalcrozes,Suzuki,and Gordon’s approaches.Based on the evaluations of these four case studies,hypotheses on the differences in the PCK were tested with the types of schools and found to be no difference.The preliminary results suggested that music teachers in private international schools had similar pedagogical approaches to music instruction to teachers in aided-public schools.Additionally,the modeling,guiding,and training approach was identified as a grounded teaching method for music education at the primary school level regardless of different types of schools.Other implications like the further development of the framework were discussed. 展开更多
关键词 PEDAGOGY social constructivism music education primary school hong kong
下载PDF
Research on the Integration of Lingnan Culture into“Four Histories”Education for Hong Kong Youth
4
作者 Hua Wang 《Journal of Contemporary Educational Research》 2024年第10期263-270,共8页
This study focuses on Hong Kong youth,recognizing them as a vital subject within the context of“four histories”education.From the perspective of the integration of Lingnan culture,it explores the rich resources of L... This study focuses on Hong Kong youth,recognizing them as a vital subject within the context of“four histories”education.From the perspective of the integration of Lingnan culture,it explores the rich resources of Lingnan culture,innovates the narrative system,and explores the path of positive guidance in history education.Responding to the demands of the times,it seeks to alleviate the pressing concerns of Hong Kong society,help Hong Kong youth break down prejudices,gain a comprehensive understanding of China,grasp the development context of modern China,recognize historical trends,undertake national responsibilities,and take on the mission of the times. 展开更多
关键词 Lingnan culture hong kong youth “Four Histories”education
下载PDF
Predicting Carpark Prices Indices in Hong Kong Using AutoML
5
作者 Rita YiMan Li Lingxi Song +2 位作者 Bo Li M.James C.Crabbe Xiao-Guang Yue 《Computer Modeling in Engineering & Sciences》 SCIE EI 2023年第3期2247-2282,共36页
The aims of this study were threefold:1)study the research gap in carpark and price index via big data and natural language processing,2)examine the research gap of carpark indices,and 3)construct carpark price indice... The aims of this study were threefold:1)study the research gap in carpark and price index via big data and natural language processing,2)examine the research gap of carpark indices,and 3)construct carpark price indices via repeat sales methods and predict carpark indices via the AutoML.By researching the keyword“carpark”in Google Scholar,the largest electronic academic database that coversWeb of Science and Scopus indexed articles,this study obtained 999 articles and book chapters from 1910 to 2019.It confirmed that most carpark research threw light on multi-storey carparks,management and ventilation systems,and reinforced concrete carparks.The most common research method was case studies.Regarding price index research,many previous studies focused on consumer,stock,press and futures,with many keywords being related to finance and economics.These indicated that there is no research predicting carpark price indices based on an AutoML approach.This study constructed repeat sales indices for 18 districts in Hong Kong by using 34,562 carpark transaction records from December 2009 to June 2019.Wanchai’s carpark price was about four times that of Yuen Long’s carpark price,indicating the considerable carpark price differences inHong Kong.This research evidenced the features that affected the carpark price indices models most:gold price ranked the first in all 19 models;oil price or Link stock price ranked second depending on the district,and carpark affordability ranked third. 展开更多
关键词 Carpark repeat sales index AutoML hong kong natural language processing TOKENIZATION
下载PDF
Investigation on the Integration of “Gao” in Hong Kong Chinese and Mainland Mandarin
6
作者 CHEN Yi-yun 《Journal of Literature and Art Studies》 2023年第6期423-427,共5页
From the diachronic dimension,this paper makes a two-way interactive investigation on the integration of Hong Kong Chinese and Mainland Mandarin.“Gao”is a delexical verb in contemporary Chinese.In different words an... From the diachronic dimension,this paper makes a two-way interactive investigation on the integration of Hong Kong Chinese and Mainland Mandarin.“Gao”is a delexical verb in contemporary Chinese.In different words and expressions related to“gao”character,there are mutual absorptions between Chinese mainland and Hong Kong,which is characterized by starting from nothing to something and from less to more. 展开更多
关键词 hong kong Chinese Mainland mandarin “Gao(搞)”
下载PDF
On the“Past and Present”of Hong Kong’s Finance
7
作者 Boya Zhou Zifei Wang 《Journal of Finance Research》 2021年第2期82-89,共8页
Finance is vital to a country,and Hong Kong,as a special part of the large economy of China,has unique advantages and development history.And Hong Kong’s growth from a small fishing village to a financial centre has ... Finance is vital to a country,and Hong Kong,as a special part of the large economy of China,has unique advantages and development history.And Hong Kong’s growth from a small fishing village to a financial centre has its inevitable factors:historical,geographical and policy advantages.After nearly a century of rapid development,Hong Kong has achieved many proud accomplishments in the following fields:economy,medicine,education,etc.In the process,the cooperation between Hong Kong and the mainland has become increasingly close,and the two sides of the Strait have become excellent“partners”.In recent years,due to the COVID-19 epidemic and the rise of China as a big economy,Hong Kong is facing an unavoidable dilemma.In view of this,the authors suggest that Hong Kong can develop financial technology,enhance financial security,implement green finance,and promote corporate innovation.At the same time,Hong Kong should also strengthen the relationship with the mainland.Generally speaking,under the current circumstances,Hong Kong will continue to exist as an important financial center of China,but Hong Kong should also actively face the challenges of the times and explore new developments directions in the future. 展开更多
关键词 hong kong changes hong kong finance hong kong development prospects
下载PDF
Three New Species of the Genus Caenis from Hong Kong, China (Ephemeroptera: Caenidae) 被引量:1
8
作者 童晓立 David DUDGEON 《Zoological Research》 CAS CSCD 北大核心 2002年第3期232-238,共7页
Three new species of the genus Caenis (Ephemeroptera, Caenidae), Caenis aspera sp nov , Caenis bicornis sp nov and Caenis lubrica sp nov , are described from Hong Kong, China. All type specimens... Three new species of the genus Caenis (Ephemeroptera, Caenidae), Caenis aspera sp nov , Caenis bicornis sp nov and Caenis lubrica sp nov , are described from Hong Kong, China. All type specimens are deposited in the Insect Collection of Department of Entomology, South China Agricultural University, China. 展开更多
关键词 EPHEMEROPTERA CAENIDAE Caenis New species China hong kong
下载PDF
Preserving the literary past, looking to the future: the first Hong Kong Literature Database 被引量:1
9
作者 MA Leo F.H. WONG Rita LAU Paul 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2005年第11期1341-1347,共7页
In the last two decades of the 20th century, there has been an increasing interest in and emphasis on the study of the Hong Kong literature in both the academic and general public in Hong Kong. Recognizing the emergen... In the last two decades of the 20th century, there has been an increasing interest in and emphasis on the study of the Hong Kong literature in both the academic and general public in Hong Kong. Recognizing the emergent need of the resources on Hong Kong literature, the University Library System of the Chinese University of Hong Kong set up the Hong Kong Literature Database (the “Database”), which was the first Chinese literature database in the Internet in 2000. The paper will examine how the database is constructed using XML technology andometadata schema, The database also employs Unicode UTF-8 as the internal code. A mapping table for traditional and simplified Chinese characters was created based on Unihan and is used behind the scene so that a user can either input traditional or simplified Chinese characters and retrieval will give both traditional and simplified Chinese characters. Currently 65% of journals use OCR technology so that full-text searching is possible. The Chinese OCR technology will be examined in greater detail. Special features of the Database such as, page-by-page browse mode, position-highlight for full-page newspaper, linking Table-Of-Contents and book jackets from the Library catalogue, etc. are described. The paper will also bring out the problem of massive downloading and compare the state-of-the-art technology and their shortcomings. This paper shows how the Hong Kong Literature Database facilitates future collaboration and data exchange by using open standard, shareable structure and the latest technology. 展开更多
关键词 hong kong Literature hong kong Literature Database XML Metadata schema Database structure UnicodeUTF-8 OCR technology
下载PDF
Toward a more open and collaborative climate change policy framework in Hong Kong and Macao within the Guangdong-Hong Kong-Macao Greater Bay Area
10
作者 Coco Du Christine Loh 《Chinese Journal of Population,Resources and Environment》 2020年第3期179-187,共9页
The special administrative regions of Hong Kong and Macao enjoy a high degree of autonomy from the national policy system in devising their local policies,including measures related to climate change.Hong Kong and Mac... The special administrative regions of Hong Kong and Macao enjoy a high degree of autonomy from the national policy system in devising their local policies,including measures related to climate change.Hong Kong and Macao each have their own climate change policies,some aspects of which are more advanced than policies in China's Mainland.While their high degree of policy autonomy has advantages,this has also isolated them from China's larger environmental management and practices that continue to advance at scale.This paper reviews the climate change policies of the two special administrative regions and analyzes their strengths and innovations,particularly in adaptation.It also identifies areas where there could be closer engagement,collaboration,and capacity-building with the China's Mainland,which has the potential for greater positive impacts,especially on a regional basis. 展开更多
关键词 Climate change policy High degree of autonomy hong kong MACAO Guangdong-hong kong-Macao Greater Bay Area COLLABORATION
下载PDF
The Dynamics of Hong Kong Identity: A Sociolinguistic Perspective
11
作者 Siu-lun Lee 《Sociology Study》 2013年第5期334-340,共7页
This paper looks at the language use and the language situation of Hong Kong and their relationship with the identity issue or identity crisis (as reported in some of the media, such as The Guardian, March 2012). T... This paper looks at the language use and the language situation of Hong Kong and their relationship with the identity issue or identity crisis (as reported in some of the media, such as The Guardian, March 2012). The "bi-literacy and tri-lingualism language policy" of Hong Kong is discussed. The use of the three language varieties, namely Cantonese, English and Mandarin are discussed in relation to Hong Kong people's proclaimed cultural identity. The emergence of mixed code (juxtaposing English into Cantonese utterances) also marks the link between language and proclaimed cultural identity. With the several social issues happened in Hong Kong 2010-2012, Hong Kong citizens' sense of belonging with an ethnic Hong Kong identity reached the highest according to the Public Opinion Program launched by one of the universities in Hong Kong. Language use in one of the recent television drama series magnifies the issue of "Hongkongness" which is closely linked to the use of Cantonese and mixed code. 展开更多
关键词 SOCIOLINGUISTICS language use hong kong identity hong kong studies CANTONESE
下载PDF
Eurovet Unveils the New Image of Hong Kong Mode Lingerie 2010 March 30-31, at the Hong Kong Convention and Exhibition Centre
12
《China Textile》 2010年第2期20-21,共2页
Organized by Eurovet, the world’s leading lingerie and beachwear trade show organizer and supported by Hong
关键词 2010 Eurovet Unveils the New Image of hong kong Mode Lingerie 2010 March 30-31 at the hong kong Convention and Exhibition Centre
下载PDF
Hong Kong Fashion Week for S/S——Hong Kong Fashion Week showcases design excellence
13
《China Textile》 2008年第6期18-18,共1页
Organised by Hong Kong Trade Development Council(HKTDC),HKTDC Hong Kong Fashion Week for Spring/ Summer 2009 is not only an important sourcing platform for the global fashion industry,it is also a showcase for design ... Organised by Hong Kong Trade Development Council(HKTDC),HKTDC Hong Kong Fashion Week for Spring/ Summer 2009 is not only an important sourcing platform for the global fashion industry,it is also a showcase for design excellence. 展开更多
关键词 hong kong Fashion Week for S/S hong kong Fashion Week showcases design excellence
下载PDF
Emergy evaluation of the environment and economy of Hong Kong 被引量:20
14
作者 Lan ShengfangDepartment of Biology, South China Agricultural University,Guangzhou 510642, ChinaHoward T. Odum(Environmental Engineering Sciences , University of Florida .Gainesville, FL 32611 , USA) 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 1994年第4期432-439,共8页
An environment-economy systems analysis of Hong Kong has been carried out using a newmeasure emergy for evaluating its environmental resource basis and economy as well as its international e-conomic relations for reco... An environment-economy systems analysis of Hong Kong has been carried out using a newmeasure emergy for evaluating its environmental resource basis and economy as well as its international e-conomic relations for recommending a sustainable development. Emergy is the total energy uf one kind re-quired directly and indirectly to form a resource, product or service. It provides a common basis for mea-surement of the value of environment and economy.A preliminary analysis of emergy contributions supporting the system of Hong Kong is presented inthis paper. 展开更多
关键词 EMERGY solar transformity environmental resource hong kong.
下载PDF
Evaluation of ENVISAT ASAR data for sea surface wind retrieval in Hong Kong coastal waters of China 被引量:7
15
作者 XU Qinga LIN Hui +3 位作者 ZHENG Quanan XIU Peng CHENG Yongcun LIU Yuguang 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2008年第4期57-62,共6页
The C-band wind speed retrieval models, CMOD4, CMOD - IFR2, and CMOD5 were applied to retrieval of sea surface wind speeds from ENVISAT (European environmental satellite) ASAR (advanced synthetic aperture radar) d... The C-band wind speed retrieval models, CMOD4, CMOD - IFR2, and CMOD5 were applied to retrieval of sea surface wind speeds from ENVISAT (European environmental satellite) ASAR (advanced synthetic aperture radar) data in the coastal waters near Hong Kong during a period from October 2005 to July 2007. The retrieved wind speeds are evaluated by comparing with buoy measurements and the QuikSCAT (quick scatterometer) wind products. The results show that the CMOD4 model gives the best performance at wind speeds lower than 15 m/s. The correlation coefficients with buoy and QuikSCAT winds are 0.781 and 0.896, respectively. The root mean square errors are the same 1.74 m/s. Namely, the CMOD4 model is the best one for sea surface wind speed retrieval from ASAR data in the coastal waters near Hong Kong. 展开更多
关键词 sea surface wind speed wind retrieval algorithms ENVISAT ASAR hong kong
下载PDF
Features of Ciguatera Fish Poisoning Cases in Hong Kong 2004-2007 被引量:3
16
作者 CHUN-KWAN WONG PATRICIA HUNG +3 位作者 KELLIE L. H. LEE TINA MOK THOMAS CHUNG KAI-MAN KAM 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2008年第6期521-527,共7页
Ohjective To review the clinical features and laboratory investigations of ciguatera patients in Hong Kong between 2004 and 2007 in order to show the timely sampling of implicated fish from ciguatera victims and appli... Ohjective To review the clinical features and laboratory investigations of ciguatera patients in Hong Kong between 2004 and 2007 in order to show the timely sampling of implicated fish from ciguatera victims and application of validated mouse bioassay for confirming suspected clinical cases of ciguatera. Methods Diagnosis of the ciguatera victims was based on history of coral fish consumption and clinical presentations stated in official guidelines for clinical diagnosis of ciguatera fish poisoning in Hong Kong. Food remnants of coral fish samples were collected swiftly from ciguatera victims between 2004 and 2007 for ciguatoxins (CTXs) analysis. Results Major clinical symptoms in ciguatera patients included gastrointestinal and neurological effects including limb numbness and diarrhoea, which developed at 0.5 to 15 hours after consumption of fish. In most cases, neurological symptoms were more common than gastrointestinal symptoms. A broad range of attack rate (10%-100%) was observed in each ciguatera outbreak. Validated mouse bioassay on ether extracts of the food remnant samples confirmed that all were CTXs-positive (〈0.5 - 4.3 MU/20 mg ether extract) and directly linked to the corresponding ciguatera cases. Conclusion Consistency between clinical and laboratory analysis for ciguatera poisoning illustrates the application of laboratory mouse bioassay in a timely fashion for confirming ciguatera poisoning cases and implementing effective public health measures. With further improvement in laboratory techniques, features of ciguatera fish poisoning cases can be better defined, Further studies are needed to determine the risk of each class of CTXs (Pacific-, Indian- and Caribbean-CTXs) in Hong Kong. 展开更多
关键词 Ciguatera poisoning CIGUATOXIN Food remnants hong kong Mouse bioassay
下载PDF
Barcelona Clinic Liver Cancer outperforms Hong Kong Liver Cancer staging of hepatocellular carcinoma in multiethnic Asians: Real-world perspective 被引量:4
17
作者 James Weiquan Li Boon-Bee George Goh +1 位作者 Pik-Eu Chang Chee-Kiat Tan 《World Journal of Gastroenterology》 SCIE CAS 2017年第22期4054-4063,共10页
To compare the Barcelona Clinic Liver Cancer (BCLC) and Hong Kong Liver Cancer (HKLC) classification systems when applied to HCC patients from the largest tertiary-level centre in Singapore.METHODSOne thousand two hun... To compare the Barcelona Clinic Liver Cancer (BCLC) and Hong Kong Liver Cancer (HKLC) classification systems when applied to HCC patients from the largest tertiary-level centre in Singapore.METHODSOne thousand two hundred and seventy hepatocellular carcinoma (HCC) patients prospectively enrolled in a tertiary-level centre registry in Singapore since 1988 were studied. Patients were grouped into their respective BCLC and HKLC stages. Data such as demography, aetiology of HCC and type of treatment were collected. Survival data was based on census with the National Registry of Births and Deaths on 31<sup>st</sup> October 2015. Statistical analyses were done using SPSS version 21 (Chicago, IL, United States). Survival analyses were done by the Kaplan-Meier method. Differences in survival rates were compared using the log-rank test.RESULTSThe median age at presentation was 63 years (range 13-94); male 82.4%; Chinese 89.4%, Malay 7.1%, Indian, 2.8%. Hepatitis B was the predominant aetiology (75.0%; Hepatitis C 7.2%, Hepatitis B and C co-infection 3.8%, non-viral 14.0%). Both BCLC and HKLC staging systems showed good separation with overall log rank test confirming significant survival differences between stages in our cohort (P < 0.001). 206 out of the 240 patients (85.8%) assigned for curative treatment by the BCLC treatment algorithm received curative therapy for HCC [Stage 0 93.2% (68/73); Stage A 82.6% (138/167)]. In contrast, only 341/558 (61.1%) patients received curative treatment despite being assigned for curative treatment by the HKLC treatment algorithm [Stage I 72.7% (264/363); Stage II 40.2% (66/164); Stage Va 35.5% (11/31)]. Patients who were assigned to curative treatment by HKLC but did not receive curative treatment had significantly poorer ECOG (P < 0.001), higher Child-Pugh status (P < 0.001) and were older (median age 66 vs 61, P < 0.001) than those who received curative therapy. Median overall survival in patients assigned to curative treatment groups by BCLC and HKLC were 6.1 and 2.6 years respectively (P < 0.001). When only patients receiving curative treatment were analyzed, BCLC still predicted overall median survival better than HKLC (7.1 years vs 5.5 years, P = 0.037).CONCLUSIONBCLC performs better than HKLC in our multiethnic Asian population in allocating patients to curative treatment in a real-life situation as well as in predicting survival. 展开更多
关键词 Hepatocellular carcinoma Barcelona Clinic Liver Cancer hong kong Liver Cancer Staging systems Prognosis Survival
下载PDF
Long-Term Trends in Extreme Temperatures in Hong Kong and Southern China 被引量:3
18
作者 T.C.LEE E.W.L.GINN 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2011年第1期147-157,共11页
The observed long-term trends in extreme temperatures in Hong Kong were studied based on the meteorological data recorded at the Hong Kong Observatory Headquarters from 1885-2008. Results show that, over the past 124 ... The observed long-term trends in extreme temperatures in Hong Kong were studied based on the meteorological data recorded at the Hong Kong Observatory Headquarters from 1885-2008. Results show that, over the past 124 years, the extreme daily minimum and maximum temperatures, as well as the length of the warm spell in Hong Kong, exhibit statistically significant long-term rising trends, while the length of the cold spell shows a statistically significant decreasing trend. The time-dependent return period analysis also indicated that the return period for daily minimum temperature at 4°C or lower lengthened considerably from 6 years in 1900 to over 150 years in 2000, while the return periods for daily maximum temperature reaching 35°C or above shortened drastically from 32 years in 1900 to 4.5 years in 2000. Past trends in extreme temperatures from selected weather stations in southern China from 1951-2004 were also assessed. Over 70% of the stations studied yielded a statistically significant rising trend in extreme daily minimum temperature, while the trend for extreme maximum temperatures was found to vary, with no significant trend established for the majority of stations. 展开更多
关键词 extreme temperature long-term trend hong kong southern China
下载PDF
Lead Concentration in Hong Kong Roadside Dust after Reduction of Lead Level in Petrol 被引量:4
19
作者 G.Y.S.CHAN V.W.D.CHUI M.H.WONG 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 1989年第2期131-140,共10页
Samples of roadside dust were collected from 30 sites in Hong Kong.The total concentrations of 10 metals in the samples were analyzed,and the correlation coefficients among the metal contents and the annual average da... Samples of roadside dust were collected from 30 sites in Hong Kong.The total concentrations of 10 metals in the samples were analyzed,and the correlation coefficients among the metal contents and the annual average daily traffic(AADT)in 1986 were determined.Pb was found to have a significant correlation(P<0.01)with AADT.No correlation was found between Al, Ba,Cd,Cr,Cu,Fe,Mn,Ni,and Zn with respect to AADT.A general decrease in the level of Pb in roadside dust in the past few years has been observed since the reduction in the level of lead in petrol.1989 Academic Press,Inc. 展开更多
关键词 Ho In Ba Lead Concentration in hong kong Roadside Dust after Reduction of Lead Level in Petrol Pb
下载PDF
Dependence of Mixed Aerosol Light Scattering Extinction on Relative Humidity in Beijing and Hong Kong 被引量:4
20
作者 LI Cheng-Cai HE Xiu +2 位作者 DENG Zhao-Ze Alexis Kai-Hon LAU LI Ying 《Atmospheric and Oceanic Science Letters》 CSCD 2013年第2期117-121,共5页
The hygroscopic properties of mixed aerosol particles are crucial for the application of remote sensing products of aerosol optical parameters in the study of air quality and climate at multiple scales. In this study,... The hygroscopic properties of mixed aerosol particles are crucial for the application of remote sensing products of aerosol optical parameters in the study of air quality and climate at multiple scales. In this study, the authors investigated aerosol optical properties as a func tion of relative humidity (RH) for two representative me tropolises: Beijing and Hong Kong. In addition to the RH data, mass concentrations of PM10 (particulate matter up to 10 utm in diameter) and aerosol scattering extinction coefficient (aext) data were used. The relationship between the mass scattering extinction efficiency (MEE, defined as O'ext/PMl0) and RH can be expressed by regression func tions asf= 1.52x + 0.29 (re= 0.77),f= 1.42x + 1.53 (re= 0.58),f= 1.19x + 0.65 (re= 0.59), andf= 1.58x + 1.30 (re = 0.61) for spring, summer, autumn, and winter, respec tively, in Beijing. Here, f represents MEE, x represents I/(1-RH), and the coefficients of determination are pre sented in parentheses. Conversely, in Hong Kong, the corresponding functions are f= 1.98x- 1.40 (r^2= 0.55),f = 1.32x - 0.36 (r^2 = 0.26),f= 1.87x - 0.65 (r^2 = 0.64), and f= 2.39x - 1.47 (r^2 = 0.72), respectively. The MEE values for Hong Kong at high RHs (RH 〉 70%) are higher than those for Beijing, except in summer; this suggests that aerosols in Hong Kong are more hygroscopic than those in Beijing for the other three seasons, but the aerosol hy groscopicity is similarly high in summer over both cities. This study describes the effects of moisture on aerosol scattering extinction coefficients and provides a potential method of studying atmospheric visibility and ground level air quality using some of the optical remote sensing products of satellites. 展开更多
关键词 mass extinction efficiency hygroscopicityJBeijing hong kong /
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部