期刊文献+
共找到385篇文章
< 1 2 20 >
每页显示 20 50 100
Effects of Flowering Mode and Pollinator Sharing on Reproductive Success in Natural Hybrid of Two Epimedium(Berberidaceae)Species
1
作者 Lanying Chen Qiumei Quan Yunxiang Li 《Phyton-International Journal of Experimental Botany》 SCIE 2024年第3期551-566,共16页
Mediated by pollenflow,natural hybridization is deemed a crucial factor that propels speciation infloral plants.Despite the fact that the diversity of Epimedium species is concentrated mainly in Southwestern China,the p... Mediated by pollenflow,natural hybridization is deemed a crucial factor that propels speciation infloral plants.Despite the fact that the diversity of Epimedium species is concentrated mainly in Southwestern China,the poten-tial impact of interspecific pollination on natural hybridization has yet to be empirically scrutinized.To explore this,we studied theflowering period and the visitors offlowers in three frequently overlapping Epimedium species at Jinchengshan National Forest Park,located in Nanchong,Sichuan Province.Additionally,we performed a ser-ies of pollination experiments to examine breeding systems and hybrid compatibility.Morphologically,Epime-dium pubescens and Epimedium wushanense are clearly distinct and easily recognizable byflower morphology,while the putative hybrid is morphologically intermediate between them.Our observation revealed that E.pub-escens and E.wushanense had 15 days of overlapping anthesis.Both species are self-incompatible and require pol-linator services for successful reproduction.Although their pollinators differ in quantity and species,Lasioglossum sp.(Hymenoptera:Halictidae)visited all three species.Artificial pollination revealed no breeding barriers among the three species,and the resulting hybrid seeds exhibited fertility.The overlapping time offlowering,commonfloral visitors,and compatibility of hybrids may be important factors contributing to successful interspecific pol-lination and speciation for natural hybrid species of E.pubescens and E.wushanense.Consequently,the role of potential interspecific pollination is crucial for hybrid speciation and the evolutionary dynamics of Epimedium species. 展开更多
关键词 Breeding system floral visitor medicinal plant species evolution
下载PDF
A system-integrated approach for the design of tourist areas at the local level under changing conditions:A case study in the Altay Mountains
2
作者 Alexandr Nikolaevich DUNETS Evgeniya Mikhailovna TABAKAEVA HAN Fang 《Regional Sustainability》 2024年第2期89-102,共14页
The existing approaches for the design of tourist areas often lead to limited flexibility in project implementation.To realize a more flexible approach,in this study,we formulated a model for planning and designing to... The existing approaches for the design of tourist areas often lead to limited flexibility in project implementation.To realize a more flexible approach,in this study,we formulated a model for planning and designing tourist areas at the local level.Moreover,specific tools for analyzing tourist areas and ensuring sustainable development under changing conditions were developed.This study was conducted in two tourist regions,Biryuzovaya Katun tourist complex and Belokurikha destination(including Belokurikha City with Belokurikha 2 Gornaya tourist complex and surrounding areas),in the Altay Mountains.We employed the recreation opportunity spectrum and proposed a system-integrated programming approach for the design of tourist areas at the destination and site levels.The key of this approach was the collection and analysis of current spatial data,including the spatial distribution of attractions and visitor flows.We constructed heat maps using video recording and unmanned aerial vehicle(UAV)observation data.Moreover,we analyzed the video stream using an image-analyzing framework You Only Look Once(YOLO)v5 software.The heat map of visitor flows based on video recording data in the Andreevskaya Sloboda museum of Belokurikha 2 Gornaya tourist complex allowed us to highlight the most attractive sites in this area and classify them into one of three types:points of functional concentration,points of transitional concentration,and points of attractions.The heat maps in Biryuzovaya Katun tourist complex,created using UAV observation data,allowed us to determine the spatiotemporal patterns of visitor flows and tourists’preferences throughout the day within four time intervals:09:00-12:00,13:00-14:00,14:00-15:00,and 16:00-18:00(LST).The maximum visitor flow density occurred from 16:00 to 18:00 in the beach area of the artificial lake.A comparison between the visitor-concentrated sites and the current facilities provided insights into the demand for attractions and facilities and the lacking areas.Heat maps are useful in analyzing the land use at the site level,while zoning based on the recreation opportunity spectrum can be used to design tourist areas at the destination level.The proposed methods for analyzing the use of tourist areas contribute to the development of adaptive tourism design. 展开更多
关键词 Tourism planning Tourist areas Unmanned aerial vehicle(UAV) visitor flows Heat map Altay Mountains
下载PDF
Visitor模式在GIS要素绘制中的应用
3
作者 赵红超 方金云 唐志敏 《计算机工程与应用》 CSCD 北大核心 2005年第6期95-97,126,共4页
Visitor模式是诸多设计模式中重要的一种。该文探讨了GIS中地理要素的绘制,通过对各种方法的对比,循序渐进地论述了Visitor模式作为最终设计方案的过程,并且说明了使用这种设计模式的所带来的好处。
关键词 GIS 地理要素 OPENGIS规范 几何对象模型 visitor设计模式 二进制继承
下载PDF
Int’l expo provides greater stage for global businesses
4
《China Report ASEAN》 2024年第5期6-9,共4页
The fourth China International Consumer Products Expo,which was held from April 13 to 18,broke records for scale,as well as for numbers of new products,visitors and exhibited brands.A total of 4,019 brands from 71 cou... The fourth China International Consumer Products Expo,which was held from April 13 to 18,broke records for scale,as well as for numbers of new products,visitors and exhibited brands.A total of 4,019 brands from 71 countries and regions were presented at this year’s six-day expo in Haikou,the capital of south China’s Hainan Province,with those figures respectively increasing by 19 percent and 9 percent from last year,according to organizers. 展开更多
关键词 visitorS FIGURES FOURTH
下载PDF
Heberlein jet technology drives innovations in demanding technical applications
5
《China Textile》 2024年第2期52-52,共1页
Heberlein Technology AG,Wattwil,Switzerland,March 7,2024–Unique technology for creating advanced technical textiles with exquisite characteristics was featured at the Techtextil in Germany.Heberlein,the leading suppl... Heberlein Technology AG,Wattwil,Switzerland,March 7,2024–Unique technology for creating advanced technical textiles with exquisite characteristics was featured at the Techtextil in Germany.Heberlein,the leading supplier of air interlacing and air texturing jets,plans to convince visitors to the event with critical components–such as the latest PolyJet-TG-3–that can influence both yarn properties and processes. 展开更多
关键词 DRIVES TECHNOLOGY visitorS
下载PDF
Stunning evenness in filament yarns
6
《China Textile》 2024年第3期49-49,共1页
Heberlein AG,Wattwil,Switzerland,May 14,2024-Unique technology for creating advanced technical textiles with exquisite characteristics was featured at ITM in Turkey.Heberlein,the leading supplier of air interlacing an... Heberlein AG,Wattwil,Switzerland,May 14,2024-Unique technology for creating advanced technical textiles with exquisite characteristics was featured at ITM in Turkey.Heberlein,the leading supplier of air interlacing and air texturing jets,plans to amaze visitors to the event with critical components-such as the latest Poly-Jet-TG-3-that can influence both yarn properties and processes. 展开更多
关键词 PROCESSES visitorS creating
下载PDF
Media Watch
7
《ChinAfrica》 2024年第2期7-7,共1页
Over the past few years,more and more young Chinese have been re-discovering their passion for zoos.According to data collected by the Hongshan Forest Zoo in Nanjing,Jiangsu Province in east China,while seniors aged 6... Over the past few years,more and more young Chinese have been re-discovering their passion for zoos.According to data collected by the Hongshan Forest Zoo in Nanjing,Jiangsu Province in east China,while seniors aged 60 and above accounted for 70 percent of its visitors in 2019,young adults in their 20s made up 60.21 percent in 2023. 展开更多
关键词 FOREST YOUNG visitorS
下载PDF
Exhibition Global interest in ITM 2024 Exhibition
8
《China Textile》 2024年第3期62-63,共2页
Bringing together the world's leading textile technology leaders in Istanbul,ITM 2024 Exhibition has achieved a great success by hosting thousands of visitors from 94 countries.Professional visitors and investors ... Bringing together the world's leading textile technology leaders in Istanbul,ITM 2024 Exhibition has achieved a great success by hosting thousands of visitors from 94 countries.Professional visitors and investors from countries such as Sri Lanka,Uruguay,Peru,Trinidad and Tobago,Rwanda,Mauritius,Mongolia,Tuvalu,Singapore,Rwanda,Mauritius,Mongolia,Tuvalu,Singapore once again demonstrated the global attraction power of the exhibition. 展开更多
关键词 EXHIBITION visitorS SINGAPORE
下载PDF
惠山泥人的魅力
9
作者 王瑾瑜 张依固(指导) 《疯狂英语(初中天地)》 2024年第7期70-71,共2页
惠山泥人是无锡的传统文化,也是中国非物质文化遗产之一,是中华民族文化的结晶。Many residents in Wuxi like wandering through the ancient streets of Huishan Ancient Town,visiting the shops selling a variety of Huishan clay ... 惠山泥人是无锡的传统文化,也是中国非物质文化遗产之一,是中华民族文化的结晶。Many residents in Wuxi like wandering through the ancient streets of Huishan Ancient Town,visiting the shops selling a variety of Huishan clay figurines.These shops showcase different kinds of vivid figurines,from charming children to lovely animals from Chinese folklore,and even historical characters.Each piece is so charming and exquisite that it draws visitors from all over the world. 展开更多
关键词 惠山泥人 FOLK visitorS
下载PDF
Segmentation by domestic visitor motivation: Changbai Mountain Biosphere Reserve, China 被引量:2
10
作者 GU Xiao-ping Bernard J.LEWIS +6 位作者 NIU Li-jun YU Da-pao ZHOU Li ZHOU Wang-ming GONG Zhen-cai TAI Zhi-juan DAI Li-min 《Journal of Mountain Science》 SCIE CSCD 2018年第8期1711-1727,共17页
Protected areas have become important tourism products that promoted as attractions by the tourism industry. Taking the Changbai Mountain Biosphere Reserve in Northeast China as a case, this study addresses visitor ne... Protected areas have become important tourism products that promoted as attractions by the tourism industry. Taking the Changbai Mountain Biosphere Reserve in Northeast China as a case, this study addresses visitor needs as a basis for developing a tourism strategy aimed at enhancing tourist opportunities at this reserve. A factor-cluster approach was employed to identify visitor segment profiles based on their visit motivations. Through random sampling, a pencil-and-paper questionnaire in Chinese language was collected from 637 domestic tourists in the study area. A principal components analysis of motivations revealed eight motivational factors, and four distinct groups of tourists – Nature travelers, Cultural landscape tourists, Food & shopping enthusiasts, and Eclectic adventurers – were identified. Understanding the differences in these visitor segments will help the management authority effectively analyze nature reserve attributes and provide alternative activities and services to tourists. Finally, within the dual framework of market segmentation and destination management some management recommendations and marketing implications are suggested. 展开更多
关键词 Tourism motivation visitor segmentation ECOTOURISM Changbai Mountain Biosphere Reserve Principal components analysis
下载PDF
An analysis of first-time and repeat visitors to Korean national parks from 2007 and 2013 被引量:1
11
作者 yunseon choe michael a.schuett kyu-won sim 《Journal of Mountain Science》 SCIE CSCD 2017年第12期2527-2539,共13页
This paper examined visitors to Bukhansan National Park in Korea based on first-time and repeat visitation. Bukhansan National Park is Korea's most heavily visited national park with annual visitation of six milli... This paper examined visitors to Bukhansan National Park in Korea based on first-time and repeat visitation. Bukhansan National Park is Korea's most heavily visited national park with annual visitation of six million visitors in 2015. Data used in this article were collected on-site in the park in 2007 and 2013 by the Korea National Park Service(KNPS).The study variables included socio-demographics,travel behavior, motivation, and satisfaction with park attributes, services and facilities. Data were analyzed by each study year for first-time and repeat visitors.Results showed significant differences for both firsttime and repeat visitors on several socio-demographic,travel behavior, and motivation variables within each study year. For satisfaction with park attributes,facilities and services, first-time visitors were significantly different from repeat visitors on seven variables for both years. Implications are given regarding programs and services to improve visitor satisfaction and sustain the natural, cultural and historical resources at Bukhansan National Park and other national parks in Korea. Future research suggestions are provided to learn more about visitor characteristics, standards of quality and preferences in the national parks. 展开更多
关键词 Bukhansan National Park Korean national parks visitor behaviour Market segmentation visitor satisfaction
下载PDF
Modeling visitor use on high elevation mountain trails: An example from Longs Peak in Rocky Mountain National Park, USA 被引量:1
12
作者 David PETTEBONE Ashley D'ANTONIO +1 位作者 Abigail SISNEROS-KIDD Christopher MONZ 《Journal of Mountain Science》 SCIE CSCD 2019年第12期2882-2893,共12页
Increasing use on mountain summits has both social and ecological implications.High numbers of visitors climbing mountain summits can be a safety issue,particularly in areas where terrain or elevation leads to queuein... Increasing use on mountain summits has both social and ecological implications.High numbers of visitors climbing mountain summits can be a safety issue,particularly in areas where terrain or elevation leads to queueing that may cause time delays.Estimating visitor use levels at site specific locations en route to summits is needed to understand the potential benefits and impacts of visitor use in these locations.However,it can be difficult to obtain reliable and robust data to estimate use and develop statistical relationships because of the remote and harsh climates on mountain summits,as well as the financial and personnel requirements involved to collect the data in remote locations.In 2015,data were collected on the higher stretches of the Keyhole Route on Longs Peak in Rocky Mountain National Park,USA(RMNP)to better understand use levels near the summit and to explore potential statistical relationships to trailhead use data that are relatively easy to collect.Strong statistical relationships from robust regression analyses were found between trailhead use counts and daily and hourly use totals on the"Homestretch"which is a final section of the Keyhole Route.Additionally,a strong statistical relationship was found between total daily use and maximum hourly use on the Homestretch.The results suggest that trailhead counts are an accurate and reliable means from which to estimate use levels on upper portions of the Keyhole route.Moreover,this research demonstrates the usefulness of an approach using proxy variables to estimate visitor use along remote peaks where data collection can be difficult.These types of data can elucidate various options and decisions for park management teams who are charged with deciding if and how to manage high use areas. 展开更多
关键词 visitor use Mountain summits National parks Use estimation Recreation use Proxy variables
下载PDF
Violence against health care staff by patient’s visitor in general hospital in Greece: Possible causes and economic crisis 被引量:1
13
作者 Evmorfia Koukia Polyxeni Mangoulia +1 位作者 Nikolaos Gonis Theofanis Katostaras 《Open Journal of Nursing》 2013年第8期21-27,共7页
This study examined the types of violence experienced by physicians, nurses and nurse assistants in various departments by patients’ visitors. Few studies have focused on patients’ visitors’ violence against nurses... This study examined the types of violence experienced by physicians, nurses and nurse assistants in various departments by patients’ visitors. Few studies have focused on patients’ visitors’ violence against nurses or physicians in general hospitals and various departments in the beginning of economic crisis in Greece. A total of 250 health care staff—physicians, nurses, nurses’ assistants—took part in a questionnaire-based study. A majority of respondents had experienced some forms of violence (verbal, psychological, physical and sexual). The most frequently reported incident was verbal violence followed by psychological violence. Violation of visiting hours and long waiting periods were among the most common causes of violence. Associations were found between workplace violence and demographics and types of wards. Nurses identified economic crisis to be the major cause of violence. The most significant finding is the high rate of workplace violence caused by patients’ visitors due to economic crisis and the fact that we found no statistically significant differences in the prevalence of violence among different health professionals. 展开更多
关键词 WORKPLACE VIOLENCE Health Care PROFESSIONALS visitor
下载PDF
Agglomerative Approach for Identification and Elimination of Web Robots from Web Server Logs to Extract Knowledge about Actual Visitors 被引量:1
14
作者 Dilip Singh Sisodia Shrish Verma Om Prakash Vyas 《Journal of Data Analysis and Information Processing》 2015年第1期1-10,共10页
In this paper we investigate the effectiveness of ensemble-based learners for web robot session identification from web server logs. We also perform multi fold robot session labeling to improve the performance of lear... In this paper we investigate the effectiveness of ensemble-based learners for web robot session identification from web server logs. We also perform multi fold robot session labeling to improve the performance of learner. We conduct a comparative study for various ensemble methods (Bagging, Boosting, and Voting) with simple classifiers in perspective of classification. We also evaluate the effectiveness of these classifiers (both ensemble and simple) on five different data sets of varying session length. Presently the results of web server log analyzers are not very much reliable because the input log files are highly inflated by sessions of automated web traverse software’s, known as web robots. Presence of web robots access traffic entries in web server log repositories imposes a great challenge to extract any actionable and usable knowledge about browsing behavior of actual visitors. So web robots sessions need accurate and fast detection from web server log repositories to extract knowledge about genuine visitors and to produce correct results of log analyzers. 展开更多
关键词 WEB Robots WEB Server Log REPOSITORIES Ensemble Learning Bagging Boosting and Voting Actionable KNOWLEDGE Usable KNOWLEDGE Browsing Behavior GENUINE visitorS
下载PDF
Evaluation of the Validity of Interpretation System for the Visitors to Yuntaishan Global Geopark in China
15
作者 Dongying Wei,Min Wang College of Geography,Beijing Normal University,Beijing 100875,China. 《地学前缘》 EI CAS CSCD 北大核心 2009年第S1期303-303,共1页
This study was conducted over a twelve-month period of study at Yuntaishan Global Geopark centered to assess the validity of interpretation system for the visitors there.And the author designed four sets of questionna... This study was conducted over a twelve-month period of study at Yuntaishan Global Geopark centered to assess the validity of interpretation system for the visitors there.And the author designed four sets of questionnaires for it,one for Chinese visitors, one for English-speaking visitors,one for the interpreters and one for management staffs of Yuntaishan Global Geopark.1149 Chinese visitors,15 English-speaking visitors,63 interpreters and 展开更多
关键词 EVALUATION visitor surveys Yuntaishan GLOBAL GEOPARK INTERPRETATION system
下载PDF
The Perception of Locals and Visitors for Development on Internal Transports of Sukhothai Historical Park
16
作者 Pakin Witchayakawin Raktibul Chantanupan 《Journal of Tourism and Hospitality Management》 2018年第2期39-46,共8页
This qualitative research aims to study the perception of locals and inbound visitors to develop the internal transport of Sukhothai Historical Park.The primary data were collected by observation,in-depth interview,an... This qualitative research aims to study the perception of locals and inbound visitors to develop the internal transport of Sukhothai Historical Park.The primary data were collected by observation,in-depth interview,and small group discussion from the key informants that include 19 locals and 17 visitors during November 2017 by purposive sampling.The data were analyzed by content analysis,categorizing,and thematising.The findings present the perception and attitudes of locals and visitors towards the internal transport as well as its problems of the Sukhothai Historical Park.By analysis of the collected data,the authors of this paper offer some solutions to develop and improve the park’s internal transport in several ways. 展开更多
关键词 PERCEPTION locals and visitorS INTERNAL TRANSPORTS Sukhothai HISTORICAL PARK
下载PDF
Culturally Sensitive Medical Care and Nursing Support: A Study of the Concerns of Foreign Visitors to Japan
17
作者 Yuki Murase Miwa Yamamoto 《Open Journal of Nursing》 2019年第3期329-346,共18页
Background: Considering the development of international transportation in modern societies, nursing care needs to be sensitive to the cultures and customs of patients from other countries. The purpose of this study i... Background: Considering the development of international transportation in modern societies, nursing care needs to be sensitive to the cultures and customs of patients from other countries. The purpose of this study is to determine, from the perspective of culturally sensitive nursing support, the cultural practices that foreigners consider important when they visit a Japanese hospital for check-ups or hospitalization. Methods: A survey was completed by 110 foreign participants at a shrine in Kyoto City. The purpose of the survey was to evaluate the concerns of foreign visitors regarding Japanese medical providers, caused by cultural differences such as customs of daily life. The statistical analyses were performed using descriptive statistics as well as cross-tabulation, chi-square, and Fisher’s exact tests. Results: After grouping participants by continent, the top concerns observed in all groups about visiting a Japanese hospital were accessibility to and cost of medical care. First, as for medical facilities, participants from North and South America (North and South American) and Europe (Europeans) were significantly more concerned than those in Asia (Asians) (P P P P P Conclusion: Nurses need opportunities to learn and understand differences in cultures. If nurses have opportunities to learn cultural differences as well as to experience caring for foreign patients, their competencies in culturally sensitive nursing support will improve over time. It can be said that this is an issue not only in Japan but also in all other countries. 展开更多
关键词 CULTURAL Care CULTURAL Differences FOREIGN visitorS Nursing Support UNDERSTAND Different CULTURES
下载PDF
China and South Korea FTA Will Bring New Opportunities
18
作者 Li Xiabing 《China's Foreign Trade》 2015年第2期50-51,共2页
On February 25,2015,China and South Korea have initialed their free trade agreement(FTA),the end of the FTA negotiations,according to a brief statement on the Ministry of Commerce(MOC)website.The China-South Korea FTA... On February 25,2015,China and South Korea have initialed their free trade agreement(FTA),the end of the FTA negotiations,according to a brief statement on the Ministry of Commerce(MOC)website.The China-South Korea FTA is a high-level and comprehensive one that also includes investment and services trade.What’s in the FTA?According to the information 展开更多
关键词 Korea brief statement companies approval PARTNER CONCLUSION OFFICIALS visitorS COSMETICS
下载PDF
Chinese Cuisine Through Foreign Visitors' Eyes
19
作者 Margaux Schreurs 《China's Foreign Trade》 2015年第3期71-71,共1页
Chinese food may seem a litde bit overwhelming to the foreign eye.My parents just visited me in Beijing,and I was really unsure of where to take them.Do I take them to a Sichuan restaurant first?Or a Beijingstyle rest... Chinese food may seem a litde bit overwhelming to the foreign eye.My parents just visited me in Beijing,and I was really unsure of where to take them.Do I take them to a Sichuan restaurant first?Or a Beijingstyle restaurant?Do they have to eat duck,or dumplings,or should I just take them on a noodle tour of China?Will they 展开更多
关键词 RESTAURANT PARENTS visited really EVERYONE EATING straight FAVORITE friends visitorS
下载PDF
The Spatial Variability and Temporal Dynamics of Soil Properties as Affected by Visitors’ Pressure in an Urban Park
20
作者 Helena M. Zhevelev Pariente Sarah Atar Oz 《Journal of Environmental Protection》 2013年第8期52-64,共13页
Soil properties and their tempo-spatial heterogeneity, affected by visitors’ pressure, season and soil depth, were studied in an urban park in Tel-Aviv. Soil was sampled twice yearly in wet and dry seasons. In each s... Soil properties and their tempo-spatial heterogeneity, affected by visitors’ pressure, season and soil depth, were studied in an urban park in Tel-Aviv. Soil was sampled twice yearly in wet and dry seasons. In each season soil was sampled from areas exposed to differing levels of visitors’ pressure (VP), and designated “no VP (Control)”, “High VP” and “Low VP”. The soil samples were taken from two depths. For each soil sample, moisture, organic matter and soluble-ion contents, pH, and electrical conductivity were determined. It was found that different properties were differently affected by VP, seasonal dynamics and soil depth: organic matter content, penetration depth and sodium concentration were the most sensitive to VP;Soil moisture did not respond to VP, but sharply reflected seasonal changes;Calcium and organic matter contents were significantly affected by the soil depth. The sensitivity of soil properties to VP increased from March to July, and the upper soil layer was more sensitive to seasonal dynamics and VP than the deeper layer. Some soil properties exhibited “spotty” patterns;others a “frontal” one. Organic matter content was completely controlled by VP at both depths and in both seasons, and could be used as an indicator of soil status in recreation areas. Visitors’ activities included trampling and other anthropogenic factors that enhanced the spatial changes and seasonal dynamics of soil properties. Based on these measurements the intensity of soil degradation and dynamics was evaluated and used to describe the soil status in an urban park. 展开更多
关键词 URBAN PARK URBAN SOIL visitors’ PRESSURE SOIL Spatial Variability Seasonal Dynamics
下载PDF
上一页 1 2 20 下一页 到第
使用帮助 返回顶部