四波混频Autler-Townes分裂中的探测光影响

在双Λ-型四波混频系统中,研究了探测光强度对Autler-Townes(AT)分裂效应的影响.随着弱探测光强度增大,由缀饰态共振产生的AT分裂双峰间隔不变,但却逐渐增宽线宽且减弱直至消失;而在强耦合光失谐条件下,不对称地位于单光子共振峰两侧的AT分裂双峰却会逐渐趋于对称分布.详细讨论了探测光场对原子的缀饰影响,提出通过探测光强度可以调控原子两基态之间的有效Raman相干,从而影响AT分裂双峰的特征.

Linguistic landscape and its impacts on place-making in mountain destination:A case of Mogan Mountain Town of Huzhou City,China

The place and placeness are believed to be a crucial perspective for comprehending the transformative dynamics of tourist destinations in the context of globalization and the rapid development of the tourism industry.As the material carrier of language,linguistic landscape is an intermediary for people to endow emotions and personalities into the place,becoming an effective path for exploring the place-making in a certain area.Mogan Mountain is a famous national tourist resort,which is located in Mogan Mountain Town,Deqing County,Huzhou City,China.This is a good case area for studying the relationship between linguistic landscape and placemaking in tourist destinations.There are two theories that form the theoretical foundation of the study,namely the place and the geosemiotics.Firstly,the results showed the overall style of the linguistic landscape.Multilingual labelling(52.7%),official signs(55.3%),and standardized Chinese characters predominantly shaped the linguistic landscape,with English and other languages being complementary.Secondly,from the perspective of three dimensions of the geosemiotics framework,such as inscription,language preference,and placement position,we conduct a comprehensive semiotic analysis of the linguistic landscape,which encompasses diverse facets such as fonts,materials,shifts in state,text vectors,and symmetrical arrangements.Finally,we explore the influence of linguistic landscapes on the place-making of Mogan Mountain through the dimensions of location,locale,and sense of place.The information on linguistic landscapes indicates the geographical location.These linguistic landscapes play an important role in constructing the language order,nostalgic atmosphere,exotic atmosphere,and elegant and tasteful lifestyle of the public space in Mogan Mountain.Readers of linguistic landscapes,including tourists and residents,generate and identify with the unique sense of place in Mogan Mountain.These linguistic landscapes construct the destination placeness of Mogan Mountain that combines both foreign and nostalgic styles,and the integration of Chinese and Western cultures.It will help promote the image positioning of tourism destinations and have practical guiding significance for the tourism planning,landscape-making,language management,and other aspects of tourism destinations.

Dynamically enhanced Autler–Townes splitting by orthogonal XUV fields

Based on numerical solutions of the time-dependent Schr ¨odinger equation, we theoretically investigate the photoelectron spectrum of hydrogen atoms ionized by a pair of ultrashort, intense, and orthogonally polarized laser pulses with a relative time delay in a pump–probe configuration. The pump pulse resonantly excites electrons from the 1s and 2p levels,inducing Rabi oscillations. The resulting dynamically enhanced Autler–Townes(AT) splitting is observed in the photoelectron energy spectrum upon interaction with the second probe pulse. In contrast to the previous parallel-polarization scheme, the proposed orthogonal-polarization configuration enables the resolution of dynamically enhanced AT splitting over a considerably wider range of probe photon energies.

Science and Technology Commissioners Supporting High-Quality Development Project for Hundreds of Counties, Thousands of Towns, and Myriads of Villages in the Context of Rural Revitalization

This paper discusses the important role of science and technology commissioners in the high-quality development of hundreds of counties,thousands of towns,and myriads of villages in the context of rural revitalization,including building bridges,accelerating the transformation of achievements,promoting the value-added of the whole agricultural industry chain,and promoting the rapid development of rural industrial economy.It also discusses the working achievements of science and technology commissioners,in order to promote further development of rural revitalization in Guangdong Province.

Huangyao Ancient Town

HUANGYAO Ancient Town is located in the northeast of Zhaoping County in Hezhou City,south China’s Guangxi Zhuang Autonomous Region.Around 60 kilometers from downtown,the ancient town covers an area of over 3.2 square kilometers.It traces its origin to the early days of the Song Dynasty(960-1279).The town expanded during the Ming Dynasty(1368-1644)and flourished during the Qing Dynasty(1644-1911).

Allocation of Public Service Facilities in Villages and Towns from the Perspective of Smart Contraction: A Case Study of Zixi County, Jiangxi Province

The limitation of traditional layout system and the continuous contraction of villages and towns have brought challenges to the layout of public service facilities.It is an imperative task against this background to integrate space resources and allocate public service facilities scientifically and reasonably.This paper took the system and method of rural public service facility allocation from the perspective of smart contraction as the theoretic support,and Zixi County in Jiangxi Province for example,built the four-level life circle of“county-fundamental-basic-routine”based on the influence factors of facility allocation,village and town contraction strength,rural comprehensive assessment results,residents’trip willingness and demands on public service facilities,finally proposed the suggestions for optimizing the allocation of village and town public service facilities.

Landscape Architecture Planning and Design Based on Landscape Ecology Theory:A Case Study of Waterfront Landscape Planning and Design of Dapo Town

With the rapid development of urbanization,landscape architecture has become an indispensable component of daily life.In order to achieve better landscape effects and protect the ecological environment,landscape ecology theory can be integrated into landscape planning to carry out disciplinary crossing and integration research between landscape ecology and landscape architecture.In this study,based on the basic theories of landscape ecology,the waterfront landscape of Dapo Town was designed,with the aim to achieve ecological balance in planning,showcase biodiversity,and create a harmonious landscape ecological environment which can benefit both nature and people.This design combined artificial and natural elements while improving the natural environment,which promoted a harmonious relationship between humans and nature,thus enriching the spatial organization of the city,and playing a role in regulating the urban environment and climate.

Spatial Protection and Development of Traditional Mountain Settlements from the Perspective of Self-organization : A Case Study of Anju Ancient Town in Tongliang District, Chongqing

Through literature research, field research and urban design analysis methods, based on the self-organization theory, the evolution characteristics of the settlement space of Anju Ancient Town with significant characteristics of traditional mountain settlements were analyzed, and then its internal and external influencing factors were summarized. Finally, appropriate protection and development strategies were proposed, such as reasonably planning functional zones, breaking through the single structure, and creating a good living cultural environment. The innovation of this study is that it integrates the self-organization theory into the cognition of traditional mountain settlement space, and discusses the connection between the mountain settlement space and the traditional regional context under the modern development concept, so as to seek the benign protection and reasonable development of traditional mountain settlement space.

My Good Friend at Hometown

I have a good friend.His name is Zhang Qiang.He is from Shiyan City,my hometown.He is a middle school student,too.He is very tall and strong.He can play basketball very well.Singing and dancing are his favorite hobbies.I like playing ping-pong.So he often plays ping-pong with me in P.E. class.

Study on the Impacts of Tourism Development in Letong Ancient Town:A Resident Perception-Based Approach

Residents constitute the principal elements of regional tourism deveopment,and their behavioral cognition will play a certain role in promoting local tourism development.In recent years,although tourism along the Sichuan-Tibet Line(318 and 317 routes)has made some progress,there are some problems,such as homogenization of products,a single local culture,and inconspicuous brand characteristics.At the same time,due to the remote geographical location,living conditions,health conditions,and other imperfections,resulting in greater constraints on tourism development.This article employs Letong Ancient Town as a representative case study,and discusses the impact of tourism development on the local economy,environment,society,and culture from the perspective of residents’perception through field research and data analysis,thereby providing a reference for regional tourism development.

Development Strategies for Z County E-sports Town in Chongqing:Integration of E-sports,Tourism,and Agriculture under New Policies

Chongqing Z County E-sports Town was once included in the“first batch of sports and leisure characteristic town pilot project list”issued by the General Administration of Sports of China.After several years of development,the e-sports industry in Z County e-sports town has struggled with issues such as a limited market,low popularity,poor business performance,and a lack of income generation capabilities.These challenges have severely hindered the town’s development,resulting in its exclusion from the recent“Chongqing characteristic town list.”Under the requirements of new policies,it can no longer promote itself,attract investment,or undertake project construction under the name of a“characteristic town”and must undergo redevelopment.This paper employs case analysis and comparative investigation methods to conduct an in-depth empirical study on the development of Z County E-sports Town.It is proposed that under the new policy environment,the town should foster the deep integration of its existing e-sports industry and culture with tourism and agriculture,transforming Z County E-sports Town into a new characteristic tourist destination.The findings of this paper offer a reference for the development of similar towns facing stagnation and provide case support for the construction of tourist destinations featuring e-sports.

Research Progress of Water Environment Protection in Historical and Cultural Towns and Villages

This study reviews research papers on the protection of water environment in historical and cultural towns and villages,summarizes present research tendencies from the perspectives of definition,classification and selection of water environment in historical and cultural towns and villages,influence of water environment on these towns and villages,proposes suggestions for improvement,and concludes characteristics and deficiencies of these researches,in order to provide references for future water environment protection in similar sites.

Study on Architectural Landscape in Ancient Townships of West Sichuan——A Case Study of Huanglongxi Town in Chengdu City of China

Through the field investigation of a typical ancient town in west Sichuan,Huanglongxi Town in Shuangliu County of Chengdu City,Fengshui orientations,characteristics of folk dwellings,the Hakkas buildings and stilt-building culture in the study area were analyzed from the perspectives of geographical location,overall layout and residential culture.The representative layouts of ancient Fengshui doctrines were stressed,such as "carrying the yin at its back and the yang in front,backing on mountains and facing water","four gods at four directions"(Azure Dragon in the left,White Tiger in the right,Black Tortoise at back and Vermilion Bird in front).Moreover,primitive architectural style and rhythm of the continuous rows of buildings,"seven streets and nine lanes",and overhanging eaves in the ancient Huanglongxi Town were demonstrated.The study is of great referential value for researches on architectural landscapes of ancient towns in west Sichuan,and modern architectural landscape designs.

Protection and Development Strategies of Historic Town——A Case Study of the Ancient Daxu Town,Guilin,China

Historic town was stressed as an important base of succeeding local cultures and characteristics,features and modes of protecting and developing historic towns in China were studied and summarized.By taking the Ancient Daxu Town for an example,the protection of this ancient town was introduced,and deficiencies of its development were pointed out as:loss of "original" behaviors of the locals,commercial acts replacing "original" folk customs,incomplete tourist facilities,shabby traditional settlements and so on.In view of this,strategies for protecting and exploring the ancient town were proposed:properly making protection,construction and tourism planning,determining the direction of functional shift,realizing organic renovation of the old town,enhancing the planning and construction of tourist facilities,promoting the sustainable development of the ancient town;expanding the chain of tourism industry,strengthening regional integration;encouraging the locals to participate into the protection and development;applying the operation mode of "supervised by government,operated by enterprises,participated by locals".

Research on Development Mode of Solid Ancient Towns Based on Cultural Reproduction——A Case Study of Zouma Ancient Town in China

The paper had pointed out hollow ancient town was the result of urbanization and desire; and analyzed that hollowness made ancient towns degenerate in nature, economy and social function, seriously blocking the sustainable development of economic society of ancient towns. Based on the connotation and idea of cultural reproduction, in terms of application of basic theories of cultural ecology and restoration ecology, it had established tourism development of solid ancient towns, which had been analyzed specifically from the perspectives of representation of ancient towns'scene, cultural realization and cultural promotion. By taking Zouwa Ancient Town in the west of the main urban area of Chongqing City for example, it had discussed tourism development practice of ancient towns, emphasized making Zouma scene reappear from the aspects of pattern protection, restoration and treatment of ecological environment, ancient towns' protection and cultural facilities' construction, experiencing and publicizing Zouma culture. It also highlighted taking historical and cultural heritages as the theme of tourist products, and proposed development mode of solid ancient towns, realizing reproduction of cultural heritage.

Discussion on Planning and Construction of Villages and Towns in Nature Reserve——A Case Study of Weitun Town of Hengshui City in China

The development of nature reserve was closely related with that of villages and towns at its surrounding area.It was the core issue to be discussed in the paper as to how to form mutually beneficial relation between them and achieve both protection of nature reserve and economic development of villages and towns.Through analysis on internal relation between nature reserve and villages and towns,it put forward three methods for planning and construction of villages and towns around the nature reserve.By taking Hengshui Lake National Nature Reserve in Weitun Town for example,it hoped to serve as a modest spur to induce exchange and discussion in the field.

Settlement Spatial Analysis of Buildings in New Countryside in Heshun Ancient Town

In the research, structure and characters of settlement were analyzed in Heshun Ancient Town in Yunnan Province. It is surveyed that growth mechanism of Heshun Ancient Town involves positive and negative effects simultaneously. Positive effect refers to integrity of boundary of Ancient Town and good inheritance of newly- developed public buildings. In contrast, negative effect refers to simplification and shortage of characteristics of newly-developed individual dwelling. With sustainable development, it would be wise for construction of Heshun new countryside to optimize diversified construction symbols.

Study on Characteristic Town Images Based on Regional Natural Envienment

Problems in the development and renovation of towns were pointed out as: imbalance between man-made and natural environment, destructed natural and humanistic landscapes. Significance of protecting and developing natural environment in the present town planning was discussed. Overall planning of Queshan County of Henan Province (China) and planning of new district in Paris (France) were taken for examples to analyze natural environment protection and development pattern of towns in terms of the overall town planning and overall form control. Meanwhile, the destruction of public welfare eco-forest caused by too many water conservancy projects in Zixi County of Jiangxi Province (China) was analyzed to propose a natural environment protection and development pattern from the perspective of ecological engineering construction. Finally, it was stressed that natural environment should be respected in the planning, human-nature harmony integrated into the planning concepts, conflicts between town construction, protection and renovation of natural environment resources coordinated, and instructive measures adopted to settle problems in town planning.

Research on Protection and Development of Traditional Ancient Towns in Southern Sichuan of China—A Case Study of Luocheng Ancient Town in China

Through the field study on Luocheng Town that is a traditional ancient town in Southern Sichuan,the paper has concluded existing resources and current situation of it.After the illustration of the general situation and protection value of Luocheng ancient town,it has analyzed the protection situation and existing problems,and considered that its landscape and environment has been seriously destroyed and architectures have been damaged gravely,protection capitals are lacked and the publicity of ancient towns protection is insufficient.In view of above problems,constructive suggestions have been proposed for the protection and development of ancient towns.It should conduct reasonable protection and planning,adjust functional structure of ancient towns,retain the completeness and integrity of ancient towns,and enhance and improve residents' protection consciousness,so as to promote the protection and sustainable development of traditional ancient towns in Southern Sichuan.

Spatial Analysis of Settlement Landscapes in Ancient Xianshi Town, Zigong City of Sichuan Province

Organization forms, components, spatial scales and configuration principles of settlement landscapes in ancient Xianshi Town, Zigong City of Sichuan Province were investigated and analyzed. Specifically, overall layout and organization forms were elaborated; spatial components of settlement landscapes were discussed from the perspectives of exterior open landscape space, interior enclosed landscape space, and transitional landscape space; factors influencing the scale of streets, lanes and buildings were introduced, spatial scales of major streets and buildings in the town were calculated; and finally configuration principles of settlement landscapes in the town were proposed from the perspectives of rhythm and sense, symmetry and balance, diversity and unification. And it was concluded that settlement landscapes in ancient Xianshi Town have achieved the harmony between human and nature in terms of both organization of overall spaces and design of partial spaces.