Lockheed Martin Dwells in Beijing

The well-known aerospace giant Lockheed Martin opened an office in Beijing on April 12, 1996, with Thomas J. Dwyer being the Chief Representative. This move suggests that Lockheed is getting aggressive in China, a country with great potential market. Russell T. Mcll, President of Lockheed Martin Astrc Space Commercial, presided over the ceremony, which was attended by

Material Analysis of Traditional Folk Dwellings and Its Modern Inheritance:A Case Study of Traditional Folk Dwellings in Hunan Province

Traditional folk dwellings contain rich cultural connotations and plain architectural techniques.In architecture,material is the most fundamental thing,different materials can demonstrate different architectural forms,and reflect local characteristics and change of the time.Therefore,it is of great significance to explore the material selection of traditional Chinese folk dwellings.The paper took traditional folk dwellings in Hunan for example to analyze the regional materials and construction of these dwellings,discussed the application of traditional materials in modern architecture,used some cases to explore the innovative application of traditional materials,so as to figure out the new direction of applying traditional materials,and provide references for the construction of modern architecture.

Urban Spatial Form Optimization Strategies Based on the Principle of Climate Adaptability of Regional Architecture: A Case Study of Traditional Cave Dwelling Villages in Northern Shaanxi Province

A multitude of climate-adaptive design approaches are embedded in regional architecture,which have a positive impact on addressing the deformed development of urban spatial patterns and the dual challenges of climate and resources.This paper examines the principles of climate adaptability embedded in the site layout and spatial organization characteristics of traditional cave dwelling villages in northern Shaanxi Province.The extracted climate adaptability principles are summarized,and the resulting design strategies that are well-suited to the contemporary urban space form are presented.Through analysis,it can be observed that traditional cave dwelling villages in northern Shaanxi are predominantly situated on south-facing slopes in proximity to water at low altitudes.These villages are characterized by compact building groups and east-west development,which is constrained by the elements of mountains and rivers.A two-level street system is generated,comprising streets parallel to the contour line and roadways perpendicular to the contour line.This results in the formation of a courtyard form enclosed by mountains.Such site layout and spatial organization exhibit excellent climate adaptability with regard to heat,ventilation,and wind storage.In light of the aforementioned considerations,the following urban spatial form design strategies are put forth:①the topographic height difference can be exploited to obtain sufficient sunshine;②the group shape can be optimized in order to reduce building energy consumption;③the best orientation of the building can be chosen to take account of both winter and summer conditions;④the height and length can be combined in order to form natural masking;⑤the D/H ratio of streets and roadways should be controlled to achieve a balance between heat gain and cooling of groups;⑥vents should be set appropriately to optimize group ventilation;⑦climate buffers should be established to increase the level of climate response.

“Chineseness”:A Discussion on Cases Related to Tulou in Contemporary Chinese Architecture

The article delves into the concept of“Chineseness”in contemporary Chinese architecture,a strategic tool for creating distinctive styles rooted in Chinese identity.It serves not only to distinguish projects from market-driven trends but also to establish a pivotal position in the global architectural landscape.“Chineseness”among 24 identified keywords represents a practical strategy embraced by many young architects with international exposure.The traditional Chinese dwelling,a symbol of familial and cultural essence,particularly in the context of home culture,is a primary inspiration for contemporary architects.The research adopts a case study approach,focusing on Tulou-related cases from the last fifteen years,encompassing various building types.The Tulou,a mountain-dwelling with rich cultural connotations,is introduced,reflecting ancient Chinese philosophies in its architectural principles.The case studies,including URBANUS’s“Tulou Collective Housing 2008”and Chengdu’s“Tulou Theater,”demonstrate how Tulou prototypes can be creatively adapted.These designs not only replicate forms but also capture the communal spirit inherent in traditional dwellings.“Stepped Courtyards”by OPEN Architecture reinterprets Tulou typology for a staff dormitory,emphasizing community awareness.In conclusion,the concept of“Chineseness”emerges as a prominent topic,showcasing the dynamic and adaptable nature of traditional Chinese culture and modern architectural expressions.The cases illustrate the evolving intersection between traditional Chinese culture and modern architecture,offering insights into the future trajectory of Chinese architectural culture.The interrelated keywords highlight the nuanced and evolving nature of“Chineseness”in architectural practices.

The Influence of the Implementation of Trade Facilitation Systems on the Time Required for Creating Delivery Orders: A Case Study of Tema Port

This study evaluated the impact of Ghana’s Integrated Customs Management System (ICUMS), implemented within the National Single Window initiative, on the efficiency of issuing Delivery Orders (DO) at Tema Port. Filling a gap in the existing literature, the research employed a quantitative approach to assess a specific time-related aspect of the cargo clearance process. Employing an Independent t-test on a dataset spanning 2026 Delivery Orders (924 pre-ICUMS and 1102 post-ICUMS) from July 2020 to July 2023, the study investigated ICUMS’s effectiveness in reducing DO issuance time. Results indicate a noteworthy decrease in average DO issuance time, from 11 days pre-implementation to approximately 9 days post-implementation, a reduction validated by statistical analysis through the independent t-test. In light of these findings, the study recommends ongoing refinement of the implementation, reinforcement of trade facilitation measures, and the adoption of best practices from successful global ports. Continuous stakeholder training and regular assessments of ICUMS performance are also endorsed. The study’s implications support the theoretical framework for Single Window systems and carry significant policy implications, emphasizing the need for collaborative efforts to streamline trade facilitation processes driven by Information Technology. Practically, the results serve as a management tool for stakeholders, highlighting areas for targeted interventions to reduce DO issuance times. Methodologically, this research contributes by applying robust statistical analysis to a specific component within the Time Release Study framework, offering a nuanced understanding of trade facilitation systems’ effectiveness in improving cargo clearance processes.

Method for calculating the capacity of bus bay

The bus operating characteristics are analyzed at the bus bay using the trajectories depending on the current status of buses. On this basis, a method for calculating the capacity of the bus bay is developed, which considers the queue probability, the dwell time distribution and the waiting time for a gap in the traffic stream at the curb lane. Then, the distribution model of the dwell time is developed using the survey data of Hangzhou city. And the log-normal distribution shows the best fitting performance. The capacities of the bus bay are computed with the Matlab program under different distribution parameters of the dwell time and different traffic volumes at the curb lane. The results show a large range of traffic capacity as the distribution parameters and traffic volumes change. Finally, the proposed model is validated by measurement and simulation, and the average relative errors between the calculated values and the measured and simulated values are 8.78% and 5.28%, respectively.

穿甲过程中的Dwell现象

陶瓷作为一种轻质高硬材料,已经广泛应用于防护小口径枪弹威胁的轻型装甲中,然而陶瓷装甲抗多次打击能力还需要提高。穿甲过程中,约束条件下瓷材料产生的Dwell现象能有效提高陶瓷的强度和硬度,从而提高陶瓷装甲的抗多次打击能力。介绍了陶瓷装甲在穿甲过程中产生的Dwell现象的定义、微观机理、影响因素以及其研究热点和研究动态。提出了仍待研究的问题并指出研究方向将集中在数值模拟计算方面。

Effects of dwell time during sintering on electrical properties of 0.98(K_(0.5)Na_(0.5))NbO_3-0.02LaFeO_3 ceramics

The effects of dwell time on the phase structure, microstructure, and electrical properties were investigated for the 0.98（K0.sNa0.5）NbO3-0.02LaFeO3 ceramics （abbreviated as 0.98KNN-0.02LF）. All the ceramics sintered for different dwell time are of pure phase and the peak intensity of the 0.98KNN-0.02LF ceramics becomes stronger with a longer dwell time. Denser microstructures with larger grain size are developed for the sample with a longer dwell time. The maximum dielectric permittivity decreases with increasing the dwell time, and the deteriorative dielectric properties are due to the increasing grain size and the domain wall motion. Ferroelectric properties results indicate that 2Pr value slightly decreases with increasing the dwell time, while the 2Ec value increases. Consequently, the 0.98KNN-0.02LF ceramic sintered at 1150 ℃ for 2 h shows optimum dielectric properties （er=2253 and tan fi〈5%） and ferroelectric properties （2Pr=34.51 gC/cm2 and 2Ec=5.07 kV/mm）.

MBE生长InGaAs/GaAs(001)多层矩阵式量子点

用分子束外延(MBE)设备以Stranski-Krastanov(S-K)生长模式,通过间歇式源中断方式外延生长了多个周期垂直堆垛的InGaAs量子点,首次获得大小及密度可调的In0.43Ga0.57As/GaAs(001)矩阵式量子点DWELL结构。样品外延结构大致为500nm的GaAs、多个周期循环堆垛InGaAs量子点和60ML的GaAs隔离层等。生长过程中用反射式高能电子衍射仪(RHEED)实时监控,样品经退火后使用扫描隧道显微镜(STM)进行表面形貌的表征。

Inheritance and Development of Cultures of Traditional Vernacular Dwellings in the Townscape Renovation Project of Guangxi,China

By analyzing background and present situation of townscape renovation project in Guangxi, endeavors for inheriting and developing cultures of traditional vernacular dwellings in the implementation of this project are discussed, and characteristics of traditional vernacular dwellings in the study area are summarized. Local vernacular dwellings can be classified in the following 3 ways on the basis of their own regional features:First, classifying by the origin and development history:stilt building, courtyard and non-courtyard building, western-style building; Second, by building materials:bamboo-wood building, stone building, adobe building, earth-stone building, brick-wood building, building of mixed materials; Third, by architectural form:stilt building, courtyard building, non-courtyard building. Stilt wooden building in northern Guangxi is a representative of traditional vernacular dwellings in the study area. By giving mature consideration to inheritance and development of cultures of traditional vernacular dwellings, this study proposes that proper renovation plans should be made according to actual conditions of the planning site; form renovation of vernacular dwellings should be taken as the new trend of renovation; traditional cultures should be further explored, demonstrated and protected. These suggestions are of great instructive significance for improving the cultural taste of townscapes.

Ecological Concepts in Traditional Vernacular Dwellings of Miao Nationality in Southeast Guizhou Province

Traditional vernacular dwellings of Miao Nationality in southeast Guizhou Province are reasonable and scientific in many aspects, such as site selection, construction, structure, direction, room layout, harmony between constructions and environment, moderate development of natural resources and so on, which demonstrate the ecological concepts of Miao people respecting the Nature, pursuing the harmonious coexistence between human beings and Nature. This study analyzed the gist of Miao people constructing vernacular dwellings, i.e. natural and harmonious ecological concepts, the principle of planning according to actual conditions, saving cost by utilizing local materials and sustainably developing architectural structure.

Ecological Culture in Traditional Chinese Vernacular Dwellings

Traditional Chinese vernacular dwellings take root in farming culture with profound connotations. Through analyzing ecological thoughts and cultural ideas in traditional vernacular dwellings, this study aims to provide references for the design of modern vernacular dwellings. It is proposed in this study that ① Ecological thoughts of traditional vernacular dwellings include the simple eco-thought of 'human-nature oneness', Fengshui (traditional Chinese ideas hold that the location of a house or tomb is supposed to have an influence on the fortune of a family) theories of 'balance of yin and yang', energy-saving thought of 'making the best use of local advantages'. Traditional vernacular dwellings are mainly constructed according to local conditions, facing the sunny side and water, backing on the shady side and mountains, with local materials and suitable construction structures for local environment and climatic conditions, which enable residents to enjoy warm winter and cool summer, sufficient sunshine, excellent ventilation and heat-proof, wind and humidity proof, that is, a natural ecological living environment. ② Cultural thoughts of traditional vernacular dwellings include the strict and square philosophical ideas as well as harmonious artistic thoughts. Traditional Chinese vernacular dwellings demonstrate morals and ethics by strict and square patterns and strong sense of hierarchy, most of them have definite axes in spatial patterns to show the hierarchy and core of construction groups; abstract patterns of flower, grass, animal or human beings are also often applied in detailed designs, showing esthetic tastes. The formation of traditional Chinese vernacular dwellings has been closely linked with social and cultural factors, living habits, geographical, water and soil, environmental and climatic conditions as well as folk customs, which can provide significant references for the design and reformation of modern new-type vernacular dwellings.

Structure and Construction Pattern of Folk Dwellings of the Dai Nationality in Guanchun Village of Dehong Prefecture,Yunnan Province

Evolution pattern of folk dwellings of the Dai Nationality in Guanchun Village,Dehong Prefecture,Yunnan Province is discussed in this study,and Field Study of the anthropology is applied to study family structure and use of residential spaces in this village.The study shows that structure of traditional residence is changing,traditional buildings cannot meet demands of modern life due to the changing lifestyle;it is a trend that traditional building materials like brick and wood are to be substituted by new materials.It implies that useful elements of traditional living styles and construction patterns should be refined in the update of folk dwellings in the village ofminorities,and combined with modern building materials and techniques to satisfy the demands of modern life.

Development and Significance of Cave Dwelling Resort on the Loess Plateau

Relevant ecotourism theories were applied to further investigate the mushrooming cave dwelling resorts on the Loess Plateau.By introducing the present development of cave dwelling settlements in the study area,types of cave dwelling resort was summarized:historic cave dwelling resort based on high cultural value,artistic value and aesthetic value;cave dwelling resort characterized by primitive folk customs;cave hotel showing folk house features of the Loess Plateau.Luochuan Resort of the Loess Folk Customs,Miaoshang Resort of Sanmenxia,Stone Cave Hotel of Yangjialing in Yan'an were respectively studied to analyze features and development conditions of cave dwelling resort,on the basis of which development principles and countermeasures were discussed.The orientation of cave dwelling resort on the Loess Plateau should be determined first,sustainability and accountability of ecotourism should be followed.Finally,the significance of cave dwelling resort for promoting local economic development,enhancing the rational utilization of natural resources,protecting and developing traditional settlements of cave dwellings was given.

Enlightenment of Modern Interior Design from the Interior Decoration of Ancient Huizhou Vernacular Dwellings

Through analyzing the basic structure of ancient Huizhou vernacular dwellings and the spatial order of interior decoration,this study rethought profoundly about modern interior design and put forward the inheritance of traditional methods in interior decoration.

Impact of Agricultural Eco-environment on the Architectural Form of Vernacular Dwellings

Through analyzing the form, materials, building techniques of vernacular dwellings in Jinzhai County, Anhui Province, this study tries to explore the influence of agricultural eco-environment on the form of folk houses, points out that vernacular dwellings are fully combined with local traditional agricultural environment from site selection, spatial form, architectural style, building materials and detail designs, which unifies the economic and environmental benefits of vernacular dwellings.

Study on Development Countermeasures of Cave Dwellings in Northern Area of Shaanxi Province in China

In view of traditional house in northern area of Shaanxi Province which was cave dwelling,based on cave dwelling and its development environment,the paper had analyzed architectural characteristics and use value of cave dwelling and its development in northern Shaanxi,and then pointed out that cave dwelling development had been reduced into an awkward situation.By using SWOT analysis method,the strengths,weaknesses,opportunities and threats of cave dwellings had been summarized.In terms of strengths,cave dwelling had ecological advantage as native architecture,was constructed based on local conditions,could solve land,energy and environment problems on Loess Plateau,and abounded in aesthetic value of native feature.In terms of weaknesses,village layout lacked of integrity,transportation was not convenient,indoor ventilation and lighting were insufficient,and pattern and space were simplified and stereotyped.In terms of opportunities,it stressed architectural ecology having received more and more attention in the world,and exploration and application of underground civil architecture.In terms of threats,it lied in construction technology of cave dwelling,contradiction between cave dwelling and urbanization and between cave dwelling and modern life,and management mode of restricted type.On this basis,it suggested that cave dwelling development in northern Shaanxi should transform people's traditio-nal concept through correct guidance of public voice;strive to eliminate weakness of cave dwelling;improve cave environment by enhancing infrastructure construction;develop characteristic cave dwelling cultural tourism in northern Shaanxi,and construct new socialist countryside of northern Shaanxi character.

Traditional Chinese Culture Reflected in Vernacular Architecture—— A Case Study of Linfengzhai Village

Taking Linfengzhai Village for an example,the culture of ritual and balance reflected in vernacular dwellings were studied.

Influence of Confucian and Taoist Cultures on Vernacular Dwellings in Jiaodong Area of China

By analyzing influence of Confucian and Taoist cultures on vernacular dwellings in Jiaodong area,especially the influence of "the doctrine of the mean" on architectural layouts of local dwellings,influence of benevolence and social institutions on the spatial sequence of local dwellings,it was pointed out that Confucian cultures enhanced the hierarchy of spaces,boundaries between internal and external spaces,symmetric layouts and orderly rhythm of courtyards;and meanwhile,the influence of Taoist cultures on the formation of villages in Jiaodong area was also analyzed,the natural philosophy implied in local dwellings was highlighted,such as "Dealing with the nature with natural laws","Going in a natural way","Governing by doing nothing that goes against the nature" and "Respecting natural properties".Based on field investigation of existing vernacular dwellings,common and plain cultural value,realistic significance and sustainability of these dwellings were explored to provide theoretical and practical foundation for the design of new folk houses.

第三代高频自动链路建立协议分析及仿真

随着现代军用通信网络的发展与进步,第三代高频自动链路建立协议(Third-generationHFAutomaticLinkEstablishment)将逐渐取代现有的第二代协议。首先从CSMA机制、Dwell-Groups技术、Multi-Slot技术等方面概略地介绍了3G-ALE技术。然后在同步工作模式下,将Dwell-Groups技术、Multi-Slot技术应用在协议当中进行了对比仿真,并分析了Dwell-Groups技术、Multi-Slot技术对3G-ALE系统性能的影响。