Views on the Discussions on the Issue of City Features

The issue of city features was putforword after the founding of New China(in 1950s).At that time,discussions weremainly related to architectural style andtype in the city.Since the adoption of the reform policyand with the rapid growth of our socialisteconomy,these has been a lot of progress inthe development of cities.Meanwhile,some     

Views on Three Milestones in the Construction of Beijing City

ＶｉｅｗｓｏｎＴｈｒｅｅＭｉｌｅｓｔｏｎｅｓｉｎｔｈｅＣｏｎｓｔｒｕｃｔｉｏｎｏｆＢｅｉｊｉｎｇＣｉｔｙ￥ＨｏｕＲｅｎｚｈｉ（Ａｃａｄｅｍｉｃｉａｎ，ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃｅａｎｄＰｒｏｆｅｓｓｏｒ，ＢｅｉｊｉｎｇＵｎｉｖｅｒｓ...     

A Summary of the Academic Symposium on the Treatment and Management of City Wastes

With the continuous worsening of theproblems of urban wastes about 60 urbanscientific workers gathered in Guiyang to dis-cuss the present state of the treatment andmanagement of urban wastes and find rela-tive solutions to the problems.The“Guiyang Symposium on the Treat-ment and Management of City Wastes”jointly sponsored by the Chinese Urban Sci-entific Research Institute,the Urban Con-struction Department of the Ministry of Ur-     

A Preliminary Research on the City Planning of “Yin”,Capital of the Shang Dynasty

“Yin”was the capital of Shang Dynasty.On the basis of archaeological findings,theauthor explored the planning and layout,distributions of city functions,structural patternsand so on of this capital of the China's slave society 3,000 years ago from the viewpoint ofcity planning.Through analysing the detailed layout of the imperial palaces,residentialareas,handicraft workshops and imperial tombs of the ancient capital city from the thensocial and economic background,the author believes that the city planning concept of theancient“Yin”township has far-reaching influence on the city planning of different dynas-ties in Chinese history.     

The Layout Study on the Emergency and Disaster-prevention Functions of the Green Space of Beijing City Parks

1 Preface In urban green space system, urban parks, with wide space, perfect facilities, low density of building, can provide excellent emergency shelter condition. Due to     

On the Special Features of a City

1 .The Aesthetie Charaeteris-ties of a City Eaeh entity Possesses its unique eharae-teristies,and its Peeuliarities in its aPPear-anee whieh can easily lead to its reeognitionand dil'f七rentiation from others;the term,'featurel' 15 frequently used to refer to suchpercePtible eharacteristi     

Effect of polyurethane on the stability of sand–clay mixtures

Three types of polyurethane were synthesized from mixtures of toluene diisocyanate, polyethylene glycol and polypropylene glycol for use in soil stabilization to improve the erosion resistance. The three polyurethanes were tested at different aqueous concentrations and sand:clay mixtures at weight ratios of 1:1, 1:3 and 1:5. The results of the rainfall simulation, unconfined compression and direct shear tests showed that the polyurethanes improve both strength and erosion resistance significantly. The observed improvement in soil erosion resistance is attributable to the physico-chemical interaction of the long-chain macro-molecules of polyurethane with the clay fraction of the soil.     

The Practice of the Comprehensive Traffic Planning for the City of Chongqing

This article discribes the comprehensive traffic planning of Cho-ngqing, an extra-large industrial city in the southwest of China,which has a geographical importance and hilly terrain. The plan-ning stresses the needs to meet the city's future socio-economic de-velopment strategy, the guarantee for the realization of urban devel-opment strategy and the solutions to the conspicuous traffic prob-lems.     

Revealing the relationship of human convergence–divergence patterns and land use: A case study on Shenzhen City,China

Understanding the relationship between human mobility and land use has been a longstanding topic in multiple disciplines, including transport geography and urban planning. Recently, urban collective mobility patterns have become a hot research direction and has been explored at an unprecedented space–time scale due to the emerging big human tracking datasets (e.g., mobile phone data). However, only a few studies have comprehensively quantified the effects of land use on human mobility patterns while considering the influence of the scale of spatial analysis units. This study attempts to reinforce this knowledge by investigating urban human convergence–divergence patterns and their relationship with land use distribution characteristics at three popular types of spatial analysis units of human mobility studies (voronoi polygons, grid cells, and traffic analysis zones) using mobile phone data. A case study on Shenzhen, China is implemented, and results indicate that eight distinct convergence–divergence patterns could be extracted to describe urban collective mobility patterns despite the use of different types of spatial analysis unit. Moreover, the scale of spatial analysis units exerts a few effects on the quantification of the influence of land use distribution on human convergence–divergence patterns, but some common characteristics could be summarized from these discrepant results. The findings can help policy makers understand urban human mobility and can serve as a guide for urban management and planning.     

The Rise of the Nantong Harbour and the Development Strategy of Nantong City

Nantong in Jiangsu Province is one ofthe 14 coastal port cities designated to opento the outside world. Recent years saw theincreasing importance of the Nantong Har-bour, with its cargo handling capacitymiraculously shooting up from 2.96 milliontonnes in 1980 to 10.19 million tonnes in1985. Nantong has grown from a lack-lus-ter inland river harbour into an importantsea port of China and the hub of theriver-sea coordinated transport system inthe Yangtze River Valley. Although it is     

Some Problems in the Economic Development of Ningbo City

I. Present SituationNingbo is the second largest city ofZhejiang Province and one of the 14 coastalcities which has been disignated for furtheropening up to the outside world. NingboCity is situated in the northeasten part ofZhejiang Province, with 5 counties and onecity under its jurisdiction (Qingxian,Fenghua, Ninghai, Xiangshan and Cixi     

Renovation and Dispersion of the Old City in Shanghai

The principle of urban renovation should be based on general planning,and the aim of it isto guide the implementation of general planning to achieve its goals.Since a city is a massive or-ganic compound system,renovation of its various ports inevitably influence,constrain,or pro-mote the general planning and lead to different results.Planners should make great efforts in guiding the renovation to a right way(a sound-circle instead of the foolish shift of the problemswhile dealing with the city's problems).Planning should not only study on the construction but al-so on the feasibility,and the relevant regulations and management measures leading to success ofimplementation.Only in this way can the planning be effective and become the guide for renova-tion of the city's old areas.Dealing with renovation of old urban buildings,this article makes aprobe into the possibility of solving housing problems by the means of private funding withsubsidization from the Government.Having achieved some experience on this,the author wouldlike to share and discuss with readers through this article.     

The influence of moisture on the deformability of cement–polymer adhesive mortar

Adhesive mortars are widely used to set porcelain stoneware tiles on buildings because their bond strength and flexibility properties increase the cladding serviceability. However, their long-term performance is not well understood, mainly the degradation of the polymeric matrix.The influence of moisture content on the flexibility of six adhesive mortars is investigated, based on standard EN 12002. Four of them have defined formulations and the other two are commercial and are widely used to set porcelain stoneware tiles on building façades in Brazil.The results show that moisture content above 6% is sufficient to reduce 50% of the mortar deformability, but that the drying process allows it to recover to a value similar to that prior to saturation; a logarithmic function best fits the correlation between moisture content and flexibility; water immersion increases matrix rigidity.It is suggested that standards should consider flexibility tests on both dried and wet samples as a requirement for polymer-modified mortars.     

Impact of sulfochlorination on the structure and properties of the MA-100 anion–exchange membrane

Modification of a homogenous anion–exchange MA-100 membrane by chlorosulfonic acid is accompanied by grafting of negatively charged–SO ₃ ^– groups and a substantial increase of hydrophilicity. The method of differential scanning calorimetry indicated that the mass fraction of free and bound water increases nearly twice. The porous structure of the modified membrane becomes more developed at the expense of an increase of the volume of micropores. The membrane acquires resistance to poisoning by large organic anions.