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1.
蒋忠信 《中国地理科学(英文版)》1993,3(4):308-325
With the methods of regression analysis and trend surface analysis, taking the bottom and top lines of dark conifer forest, bottom line of permafrost and the snowline of the latest glaciation in China as examples, this paper discusses the zonality regulaties of the distribution of physico-geographical zones in China. (1) Latitude zonality obeys the mathematical model of normal frequency distribution, being approximate to descending straightly within the latitude of China. (2) Longitude zonality shows that the elevation of physico-geographical zone rises straightly with the distance to east coast. (3) The combination of latitude and longitude zonalities appears a plane inclining from SSW to NNE. The decline of physico-geographical zone resembles a semiellipse- sphere inclining from the Qinghai-Xizang (Tibet) Plateau to northeast China, reflecting the effect of relief. (5) Physico-geographical zonation depends on the combination of hydrothermal conditions. Thus the factors influencing the distribution reg 相似文献
2.
3.
Xiaojian Li 《中国地理科学(英文版)》1996,6(4):289-303
The study shows that the regional differentiation of Hong Kong direct investment (HKDI) in China was enlarged in the 1980s
and has been reducing since 1991. The concentration of HKDI in the southern China and the coast has been replaced by the trend
of moving northwards and inlandwards after 1989. But in terms of manufacturing sectors this trend has not clearly appeared
until now. Those changing patterns are clearly related to the behaviour of Hong Kong industrial investors. The survey results
suggest that “enjoying lower production cost” is the most important motive for their investment in China. In consequence,
“close to Hong Kong”, “cheaper labour” and “favourable policy” are major factors for determining the investment locations.
This behaviour, together with the lack of comparison study in location selection among most investors, explains that Guangdong
absorbed most Hong Kong investment in the 1980s. As the production costs have been increasing in Guangdong, some companies
have started to invest in non-Guangdong locations since the end of the 1980s. From the mental map of Hong Kong investors,
however, only some of the non-Guangdong locations are practically attractive.
Supported by National Natural Science Foundation of China and the University Graduates Association (Hong Kong).
The author gratefully acknowledges the help from Professors Kam-hon Lee and Yue-man Yeung and Dr. David Chu at the Chinese
University of Hong Kong, and Mr. Chai-ming Mak at Electricity Advisory Services Limited (HK) during the early stage of the
study. 相似文献
4.
Gen-nian Sun 《中国地理科学(英文版)》2000,10(3):231-237
Modern inbound tourism in China has been developing for 20 years, a trend line of inbound tourists in statistical data began
to show. This paper introduces the concept of tourism background trend line, and explores its two functions as a barometer
in demonstrating fluctuation in the tourism economy and as a forecaster in forecasting tourism development. The tourism background
trend line is a new concept, the word “background” derived from environment science, refers to the “trend line” which reflects
the dynamic curve or dynamic equation of tourism development without considering the impact of unexpected incidents. The introduction
of this concept was inspired by Karl Marx’s comments on the relation between value and price. Tourism background trend line
reflects the summary of multiple factors involving tourism resources, tourism demand, population growth, the scale and speed
of economic development, and the spatial interaction between tourism origins and destimations. It demonstrates the natural
and stable trend and the temporal law of tourism development in a country or region. The tourism statistical curve is at random,
susceptible to disruptions and disturbances from serious political, economic and environmental happenings, but it always fluctuates
around the background line. Tourism background line can reveal the potential of a country’s tourism development. Compared
with the statistical line, it can be used as a “barometer” indicating ups and downs of tourism industry in the past. When
naturally extended, the background trend line also can be used for forecasting the trend of tourism development in future.
In this paper, 4 tourism background trend lines of China’s inbound tourists, i. e. foreign tourists, Hong Kong/Macao/Taiwan
tourists, overseas Chinese tourists and total tourists from abroad, were established with statistical data from 1978 to 1996.
And the impacts of the Political Event in 1989 (or Tiananmen Square Incident) on China’s inbound tourism were evaluated. The
result shows that the impact of the Event was not limited within one year, but it stretched over 3 years. The total loss was
20 million in tourist arrivals and $1620 million in foreign currency income. The paper also studied the trend of China’s inbound
tourism in the next 4 years.
Foundation item: Under the auspices of National Natural Science Foundation of China.
Brography: SUN Gen-nian(1961 —), male, a native of Xi’an City, Shaanxi Province, master of science, associate professor. His
research interests include environment science, geography modeling and MIS for tourism. 相似文献
5.
In the present paper, determination of isotherms of the exchange reaction between Cu(II) and clays is presented, verifying
again the “cation exchange—surface precipitation” isotherm worked out formerly in our laboratory. A modified BET equation
was applied to treating the experimental data and describing the new isotherm. In addition, the mechanism of the effects of
organics are further discussed and verified. Based on the isotherm equations and the estimates of the average area occupied
by a single molecule on the surface, we put forward a new hypothesis which differs from the current one of “organic film”.
Projects sponsored by the Science Fund of the Chinese Academy of Sciences. 相似文献
6.
王红亚 《中国地理科学(英文版)》1999,9(3):250-257
１ ＩＮＴＲＯＤＵＣＴＩＯＮＲｕｎｏｆｆｉｓｄｅｆｉｎｅｄａｓｔｈｅｗａｔｅｒｔｈａｔｄｒａｉｎｓｆｒｏｍｔｈｅｌａｎｄｉｎｔｏｃｒｅｅｋｓａｎｄｒｉｖｅｒｓ（Ｌａｎｇｂｅｉｎｅｔａｌ．,１９４９）ａｎｄｔｈｕｓａｖｅｒｙｉｍｐｏｒｔａｎｔｈｙｄｒｏｌｏｇｉｃａｌｐａｒａｍｅｔｅｒｄｅｓｃｒｉｂｉｎｇｑｕａｎｔｉｔｙｓｔａｔｕｓｏｆｓｕｒｆａｃｅｗａｔｅｒ．Ｉｔｉｓｌａｒｇｅｌｙａｆｕｎｃｔｉｏｎｏｆｔｈｅｃｌｉｍａｔｉｃｃｏｎｄｉｔｉｏｎｓｔｈｏｕｇｈｉｔｉｓａｌｓｏａｆｆｅｃｔｅｄｂｙｖｅ… 相似文献
7.
This paper deals with the infrared spectra of “amino acid-clay, calcium carbonate and γ-AlOOH” and “Cu(II)-clay-amino acid”
model systems, and shows that the model of the ternary surface complex is M-OHLCu (L=amino acid) for marine solid particle-Cu
(II)-amino acid. Study of the formation mechanism of the ternary surface complex shows that the specific surface area, and
especially the intrinsic acidity constant, determine whether the ternary surface complex is easily formed, and that factor,F
TSC, quantifies the relationship between the promoting effect of organics on Mt-marine solid particle ion exchange and the intrinsic acidity constant and specific surface area. 相似文献
8.
The Yushu Ms 7.1 earthquake occurred on April 14,2010 in Qinghai Province,China.It induced a mass of secondary geological disasters,such as collapses,landslides,and debris flows.Risk assessment maps are important for geological disaster prevention and mitigation,and also can serve as a guide for post-earthquake reconstruction.Firstly,a hazard assessment index system of secondary geological disasters in the earthquake region was built in this paper,which was based on detailed analysis of environmental and triggering factors closely related to geological disasters in the study area.GIS technology was utilized to extract and analyze the assessment index.Hazard assessment maps of secondary geological disasters were obtained by spatial modeling and overlaying analysis.Secondly,an analysis of the vulnerability of hazard bearing bodies in the area was conducted,important information,such as, population density,percentage of arable land, industrial and agricultural outputs per unit area were regarded as assessment indices to evaluate socioeconomic vulnerability.Thirdly,the risk level of secondary geological disasters of the area was obtained by the formula:Risk=Hazard×Vulnerability. Risk assessment maps were categorized into four levels,including"low","moderate","high"and"very high".These results show that some urban areas are at very high risk,including Jiegu,Chengwen,Xiaxiula and Sahuteng towns.This research can provide some references and suggestions to improve decisionmaking support for emergency relief and post- earthquake reconstruction in the study area. 相似文献
9.
This article deals with the interaction of zinc with δ−MnO2, γ−MnOOH and manganite existing in natural water systems. The mechanism of the reaction has been studied in detail. From
the fact that the “ratio of ion exchange(%)-pH” graph is an “S shaped” curve, it is possible to deduce that the chemical reaction
is of the nature of cation exchange. And since the pH range of ion exchange=4, it is possible to further deduce that the reaction
can be explained by the mechanism of monovalence cation exchange.
The main result of this article is the discovery of a new type of isotherm which has not been mentioned in previous literature
here and abroad. This isotherm cannot be represented by any presently available adsorption isotherm equations in marine chemistry.
The characteristics of this new type of isotherm are as follows: the isotherm has two “knees” and three “plateaus”, the heights
of these three “plateaus” are in the ratio 1:2:3. In order to explain theoretically our new isotherm, this article suggests
the application of the principle of interfacial stepwise ion exchange for liquid-solid distribution of minor elements on suspended
particulate matter. The corresponding isotherm equation was derived from this theory.
The results obtained in this article will be of theoretical guiding significance in the study of the marine geochemistry of
zinc.
Projects supported by the Science Fund of the Chinese Academy of Sciences. 相似文献
10.
ＤｕｒｉｎｇｔｈｅｔｈｒｅｅＭｔ．ＱｏｍｏｌａｎｇｍａＥｘｐｅｄｉｔｉｏｎｓｏｆ１９５９－１９６０,１９６６－１９６８ａｎｄ１９７５,ＣｈｉｎｅｓｅｓｃｉｅｎｔｉｓｔｓｈａｄｏｂｔａｉｎｅｄｍａｎｙｄａｔａｏｆｇｌａｃｉｅｒｓｉｎｔｈｅｄｉｓｔｒｉｃｔｏｆＭｔ．Ｑｏｍｏｌａｎｇｍａ（Ｗａｎｇｅｔａｌ．,１９８０;Ｘｉｅｅｔａｌ．,１９７５;Ｚｈａｎｇｅｔａｌ．,１９７５）．ＩｎＭａｙ１９９７,Ｐｒｏｆ．ＱｉｎＤａｈｅａｎｄＰｒｏｆ．ＰａｕｌＡ．Ｍａｙｅｗｓｋｉｏｒｇａｎｉｚｅｄａｎｏｔｈｅ… 相似文献
11.
中国东北地区地震构造以盆地群及控制盆地群的北东向断裂为主要特征,其中松辽盆地及控制该盆地的北东向断裂最具代表性,该盆地也是区域地震活动最强烈的地区。日本大地震后对中国东北地区主要活动断裂触发的库仑破裂应力中,北东向展布的大多增加,从西北至东南、从西南至东北具有逐渐增加的特点;北西向展布以及近东西向展布的大多减小,且从西至东、从西北至东南的减小值逐渐增大。日本大地震改变了中国东北地区与日本本岛的基本运动趋势,日本大地震的发生使中国东北地区由原来的挤压状态改变为拉张状态。在2002~2018年、2006~2018年2个时段的运动趋势中,日本大地震对中国东北地区的影响仍非常显著,现今中国东北地区的地球动力学环境仍将处于日本大地震的影响之中,对较为规律的中国东北地区浅源地震和深源地震的韵律性特征将产生一定影响。1999年开始的第5活动期已经结束,或将进入第6活动期前的间歇平静期,或仍将持续一段时间,还需时间的验证。 相似文献
12.
Pigment characterization for the 2011 bloom in Qinhuangdao implicated "brown tide" events in China 总被引：6，自引：0，他引：6
A large-scale bloom occurred from May to June in 2011 in sea area near Qinhuangdao of the Bohai Sea, leading to huge damage of the scallop culture industry. Similar blooms have been observed in this region for three years. The causative species of the bloom, which dominated the phytoplankton community with the maximum cell density around 109 cell/L, could not be identified with morphological features due to the small cell size (~2 mm). A pigment analytical method was then adopted to analyze the pigment profile of the phytoplankton samples collected from the blooming sea area. It was found that pico-sized (<2 mm), nano-sized (2-20 mm), and bulk phytoplankton samples had similar pigment profile, representing the pigment signature of the bloom-causative species. The major pigments detected included 19-butanoyloxyfucoxanthin (But-fuco), fucoxanthin (Fuco), diadinoxanthin (Diad) and chlorophyll a (Chl a), and high content of But-fuco was the most significant characteristics of the phytoplankton samples. Based on the pigment composition and content, the bloom-causative species could be tentatively identified as pelagophyte, "type 8" group of haptophyte, or silicoflagellate. Some unique features of the bloom, such as the extremely high cell density, small-sized and But-fuco containing cells, occurring in early summer, and the feeding-cessation effects on scallops, suggest it be a "brown tide" event similar to those reported in the east coast of the United States of America. The recurrent "brown tide" events and their dramatic impacts on the shellfish mariculture industry in Qinhuangdao need close attention in the coming years. 相似文献
13.
Ancient town Dali is located in northwest Yunnan Province. With its ancient history and natural scenery, it is preserved as
one of the first 24 historical and cultural towns in China. Dali has become one of the most popular attractions for foreign
tourists since it had its first foreign visitors in 1983. As a result, English came into the life of the local people. This
paper presents and explains the results of questionnaires and interviews about Dali people’s attitude toward learning English.
Three types of questionnaires were designed to local businessmen, local residents and foreign tourists. Interviews were also
given whenever possible. In this study, businessmen in Dali were divided into two distinct groups. One group had their business
in “Foreigners’ Street”, which was in front of Hongshancha Hotel where many foreign tourists stayed. Another group had business
in Fuxin Street, which was vertically across “Foreigners’ Street”. The 41 shops and restaurants in “Foreigners’ Street” served
mainly foreign visitors, and most of them had English names and advertisements. The 353 shops and restaurants in Fuxin Street
mainly catered for domestic visitors but also served more and more overseas ones. Subjects from local residents were mostly
young people because aging ones were apparently not much affected by English. The results of the study showed that the oral
English levels became lower from “Foreigners’ Street” to Fuxin Street to local residents, due to declining frequency of contact
with foreign people. There were also distinct differences in general English level, the understanding of the importance of
English, the purposes of communicating with foreign tourists, the willingness and purposes of going on learning English between
businessmen in “Foreigners’ Street” and Fuxin Street: people in “Foreigners’ Street” had more positive feedback than those
in Fuxin Street because their constant contact with foreigners required them to speak better English which enabled them to
exchange with foreigners in many aspects, which in turn help them to know more about other cultures. On the other hand, Fuxin
Street businessmen would catch up with more and more prospective contact with overseas people. Though local residents had
nothing to do with foreign tourists, they met them in the street every day and might have to talk with them in unexpected
ways. They lived in a place where they saw English advertisement every day. Accordingly, study results showed that they were
very much motivated to learn English. They showed even stronger desire to learn more English than businessmen in “Foreigners’
Street”, though many of them were too young to tell why English was so important for them. This is an indication that English
has become part of the necessary education for young people in Dali. With the development of tourism, Dali is gradually becoming
a place where Chinese culture and western culture meet and coexist.
This project was supported by National Natural Science Foundation of China. 相似文献
14.
Summary of studies on closed-polyculture of penaeid shrimp with fishes and moluscans 总被引：1，自引：0，他引：1
ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｗｏｒｌｄ’ｓｓｈｒｉｍｐｃｕｌｔｕｒｅｉｎｄｕｓｔｒｙｈａｓｂｅｅｎｓｕｆｆｅｒｉｎｇｆｒｏｍｖｉｒａｌｅｐｉｄｅｍｉｃｄｉｓｅａｓｅｓａｎｄｆｅｌｌｉｎｔｏａｄｉｆ ｆｉｃｕｌｔｐｏｓｉｔｉｏｎｆｏｒｙｅａｒｓ.Ｉｔｉｓｇｅｎｅｒａｌｌｙａｃｃｅｐｔｅｄｔｏｄａｙｔｈａｔｔｈｅｄｉｓｅａｓｅｓｗｅｒｅｃａｕｓｅｄｍａｉｎｌｙｂｙｗａｔｅｒｐｏｌｌｕ ｔｉｏｎｃｒｅａｔｅｄｂｙｓｈｒｉｍｐｃｕｌｔｕｒｅｉｔｓｅｌｆ,ｂｏｔｈｉｎｓｈｒｉｍｐｐｏｎｄｓａｎｄｉｎｃｏａｓ… 相似文献
15.
The common problems on tourism of developing countries have often been researched by west researchers until now, which can
be concluded into special words: “two sectors”, “enclave construction”, “government’s interference”, “developing scale”, and
“the industrial role of tourism” etc. In fact all the researches were done from the areas with the patronage of foreign visitors,
how is the situation of domestic tourism was ignored in some points. In this paper, another developing model compared with
the one with foreign visitors was presented to the readers on the case studies of countryside spas in China. Through this
research, one aspect of Chinese real leisure life can be understood to some extent, and the implying that for bigger developing
countries the domestic tourism can match the effect of international tourism should not be ignored at least to China. As the
developing of economy, domestic tourism will finally unite with international one together, and the common problems will disappear
step by step, therefore domestic tourism and international tourism of developing countries should be researched equally since
now.
Biography: WANG Yan-ping (1962–), male, a native of Heilongjiang Province, is a doctorate student of Chiba University of Japan.
His research insterest is environmental impact assessment. 相似文献
16.
Based on high-resolution tree-ring data from Dulan area of Qinghai Province, five spells have been divided: the warm period
before 230’s A. D., the cold period between 240’s A. D. and 800’s A. D., the significantly warm period between 810’s A. D.
and 1070’s, i. e. “Medieval Warm Period”, the cold period including the “Little Ice Age” 1420’ – 1870’s and the warming period
since 1880’s. All the eleven coldest or warmest decades and several great abrupt changes took place before the Middle Ages,
indicating that climatic system operated in great instability during the period 150’s – 1100’s A. D., Comparison of the tree-ring
data with other temperature proxy data from East China, Guliya ice core as well as the south of Qinghai-Xizang Plateau shows
that such great climatic events as Eastern Han warm period between the beginning of the 1st century and the previous fifty
years of the third century, the cold period covering the span of the Wei, the Jin, and the Southern and Northern dynasties,
the well-known “Medieval Warm Period” as well as the “Little Ice Age” appeared in these series such as East China and Dulan
area. Only the first two climatic events were recorded conspicuously in Guliya ice core while the “Medieval Warm Period” and
“Little Ice Age” is far weaker. Also, the well-defined “Medieval Warm Period” didn’t occurred in the south of Qinghai-Xizang
Plateau. The warming since the 20th century is the warmest in the last 2000 years Guliya ice core, the second in Dulan area
and East China, but it scarcely seems pronounced in the eastern part of Qinghai-Xizang Plateau.
Foundation item: Under the auspices of the projects of the Chinese Academy of Sciences (KZ951-A1-204-02 and KZ951-A1 402-03).
Biography: YANG Bao(1971–), male, a native of Yanggao County, Shanxi Province, Ph. D. His research interestinclude global
change. 相似文献
17.
A morphological study of a marine red alga from China, previously identified by various authors as “Solieria mollis (Harv.) Kylin”, has been shown to be an undescribed species ofSolieria. The present new speciesSolieria tenuis is characterized by the slender branches, the unbranched and nonseptate connecting filament and the discoid holdfast surrounded
by prop branches resembling proproots of land plants.
Contribution No. 989 from the Institute of Oceanology, Academia Sinica. 相似文献
18.
Pu Yongxiu 《中国海洋湖沼学报》1987,5(2):186-193
Every year during late spring and summer, a patch of surface cold water exists near the eastern side of the Subei shoal patch.
The main cause of the cold water is the monthly southward migration and climbing up of the deep cold water from the western
part of the southern Huanghai Sea. The existence of the deep ditches on the north side of the underwater delta off Subei controls
the position of this cold water.
Another patch of cold water is commonly observed southwest of Jizhou Island on the surface in the region 32oN and 124o–124.5oE during late spring and summer. Based on analysis, this water comes mainly from the deep layers of the northwest area; its
upwelling is related to the northward “impulsive” extension of the Taiwan Warm Current in the previous period, and its position
is probably related to the underwater reef chain there. 相似文献
19.
Distribution, variation and impact factors of biomass of bacterioplankton from April to May 1999 in Bohai Sea were studied in DAPI method with epifluorescence microscopy. The biomass in surface waters showed a small day-night variation, varying from 0.13 to 2.51μg/dm^3 with an average of 0.84μg/dm^3. The biomass in bottom waters showed, however, a large variation, changing from 0.15 to 4.18μg/dm^3 with an average of 1.36μg/dm^3. The peak values occurred at 5 and 11 a.m. The bottom water biomass showed a significant correlation with particulate organic carbon （r=0.639, P〈0.05）. Heterotrophic bacterioplankton biomass was high in nearshore waters and low in offshore areas with a high biomass zone around Huanghe （Yellow） River mouth, showing the same distribution of nutrients. In vertical distribution, heterotrophic bacteria biomass in bottom waters was higher than that in surface water. 相似文献
20.
TRANSFERABLE PHOSPHORUS IN SEDIMENTS OF THE HUANGHE RIVER ESTUARY ＇S ADJACENT WATERS 总被引：1，自引：0，他引：1
宋金明 《中国海洋湖沼学报》2001,19(1):81-86
Based on a new idea for research on cycling of marine biogenic elements, this study showed that only the leachable form phosphorus in natural grain sizes manne sediments constitutes the transferable phosphorous in the sediments. The transferable phosphorus content in the natural grain sizes surface sediments in the Huanghe River estuary adjacent waters ranges from 58.5-69.8 μg/g, accounting for only 9.1%-11.0% of the total phosphorus content, whereas the leachable form (“transferable” )phosphorus content in the sediment after it was totally ground into powder was found to be 454.8-529.2μg/g, accounting for 73.4%-89.1% of the total phosphorus. Analysis of the correlation between thebill,ass of benthos and the leachable form (“transferable” ) phosphorus showed that most of the leachableform (“transferable”) phosphorus in the totally ground sediment did not participate in the marine biogeo chemical cycling. Furthermore, a synchronous survey on benthos showed that the biornass of meio-and maero-benthos exhibited good positive correlation with the leachable form of phosphorus in the naturalgrain sizes sediment, but peorer correlation with the leachable form (“transferable”) phosphorus in the totally ground sediment, indicating that transferable phosphorus in marine sediment is the leachable form of phosphorus in the natural grain sizes sediments, and is not the previously known leachable form(“transferable”) phosphorus obtained from the totally ground sediment. 相似文献