Chinese Journal of Nature

Developing Process and Applying Prospects of Nuclear Power Plant

LIN Zong-Hu

2012, 34(2): 63-68.

Asbtract ( 1267 )

PDF (1553KB) ( 1081 )

Related Articles | Metrics

Since the first nuclear power plant established by the Soviet Union in 1954, many nuclear power plants with different types of nuclear reactors have been presented on the world. Main constructions of nuclear reactors and the developing process of the nuclear power plant are briefly described in this paper. According to features of the nuclear power plant, its position in the future energy and applying prospects are also mentioned.

Measurements of the Galactocentric Distance from the Sun

ZHAO Jun-Liang

2012, 34(2): 69-73.

Asbtract ( 1335 )

PDF (354KB) ( 721 )

Related Articles | Metrics

For a long time astronomers have paid great effects to determine R_⊙, the distance from the Sun to the Galactic center in different ways, including primary measurements, secondary measurements, and indirect measurements. Now, the best adopted value for R_⊙ is (8.0±0.5) kpc.

ARGO-YBJ: Gamma Ray All Sky Survey for Five Years

CAO Zhen

2012, 34(2): 74-79.

Asbtract ( 843 )

PDF (498KB) ( 910 )

Related Articles | Metrics

The ARGO-YBJ experiment has been smoothly operated for five years. Many scientific goals were achieved. Here, we summarize all the major contributions and report them to the gamma ray astronomy community. Energy spectral distribution of galactic sources and flares of active galactic nuclei are included. A future experiment LHAASO is proposed to be the new generation of apparatus which will greatly enhance the capabilities in gamma ray astronomic research.

Introduction of Cosmic Ray Research and ARGO-YBJ Experiment

ZHA Min

2012, 34(2): 80-101.

Asbtract ( 947 )

PDF (697KB) ( 760 )

Related Articles | Metrics

In this paper, the history of cosmic ray discovery is reviewed, the different technique methods relating with its observation at different energy region are also briefly reviewed. Some typical results of cosmic ray observotion are introduced, such as arrival direction and energy spectrum. The ARGOYBJ experiment was described in detail.

Several Key Problems to Mars Need to be Solved

CHEN Chang-ya

2012, 34(2): 83-87.

Asbtract ( 976 )

Related Articles | Metrics

Several key technologies to Mars are discussed in this paper including orbit design and control technology, ultra long range communication technology, autonomous control technology, and Mars probe thermal control technology. The landing control technology to Mars as well as the return technology is analyzed. The subsequent exploration of Mars and related models of task research have a certain value.

Mysterious Planet Venus

HU Zhong-Wei

2012, 34(2): 88-95.

Asbtract ( 1024 )

PDF (1119KB) ( 892 )

Related Articles | Metrics

Venus is the Earth’s nearest neighbor “sister planet” with comparative size and mass，and it is very early to be speculated that Venus may be similar in the earth’s life environment, there is even creatures. But nearly half a century of detection show that Venus is more mysterious strange world what is different with the Earth. For example, the rotation of Venus is slow in opposite directions of the Earth (retrograde rotation) one night and day of Venus equals to 116.75 of earth days, less than two night and day of Venus will spend the one year of Venus——as “one day seems like a year”.Its dense atmosphere and cloud enveloped the global, and it is hard to see the true appearance. The atmospheric pressure at its surface is 93 times that at the earth surface, and strong greenhouse effect makes surface temperature of 467 ℃, where hot and dry environment obviously does not exist biological. 60% surface elevation difference is less than 500 meters and only 5% higher than 2 km above the surface. Different from the Moon and the Mercury with old and serious meteorite impact, the entire surface of Venus seems to be the same age and geologic young with less impact crater, and dominated by volcanic geology with an average age of less than 500 million years, where nearly 90% of the surface of the consolidation is basaltic magma, all lava flows and all kinds of volcanoes, faults and fracture, but without the earth’s delivery landscape with plate tectonic characteristics, it also do not have the ocean and river. A lot of secrets of Venus need further exploration.

Quick Change of Marine Environment with Ecological Response in the Arctic Ocean

HE Jian-Feng;ZHANG Fang

2012, 34(2): 96-101.

Asbtract ( 889 )

PDF (528KB) ( 925 )

Related Articles | Metrics

The environment of Arctic Ocean are changing quickly with the global warming, e.g., the increase of water temperature and the descent of water salinity, the decrease of ice coverage and ice volume in summer, the increase of fresh water influx, and the occurrence of sea water acidification. These changes significantly influence the iceassociated ecosystem. The previous studies suggest that the habitats of the iceassociated organisms turn worse, the size of the primary producers become smaller, the decrease of ice algae decline the production of benthos, and the invasion of subArctic species influence the local species. Because the variations of Arctic Ocean environment and ecosystem exceed greatly what we expected and the knowledge is limited, a most important task for us in the coming years is to improve the observation systems and the forecasting capability of the potential changes.

Strategy and Technology Systems for Watershed Pollution Control Built on the Concept of Clean River Network

YANG Xiao-Yang;LUO Xing-Zhang;SUI Guo-Dong;ZHENG Zheng

2012, 34(2): 102-107.

Asbtract ( 840 )

PDF (805KB) ( 829 )

Related Articles | Metrics

]Nonpoint source pollution is one major source of environmental deterioration in China. The integrated watershed approach is effective for nonpoint source pollution control. On the basis of the successful experiences abroad as well as our own years of work in nonpoint source pollution control, Fudan University Basin Pollution Control Research Center put forward a complete framework of watershed pollution control and clean river network building with three guiding principles: (1) prioritize pollution control based on the watershed’s environmental capacity; (2) control pollution from cradle to grave; (3) emphasize highvalue nutrient recycling and watershed ecosystem recovery. To implement the above framework, Fudan University Basin Pollution Control Research Center conducted extensive research on pollution abatement from various nonpoint sources including rural sewage, rural solid waste, and agricultural fields, and made some interim progress in the establishment of technology systems for watershed pollution control.

How Are Ages of Stars Determined?

WANG Jia-Ji

2012, 34(2): 108-113.

Asbtract ( 1092 )

Related Articles | Metrics

It is a very important problem to determine the ages of stars in the stellar physics. Whether it can be well resolved or not is related to many other important issues in astronomy. The ages of stars are directly related to those from estimating ages of extrasolar planets to the age of the universe. In this paper, it is briefly described which ways in astronomy can be currently used to infer and estimate the ages of stars and what difficulties there are still to be introduced by the uncertainties in the evaluation of stellar ages with these methods.

Do the Best Research

GUAN Yi

2012, 34(2): 114-118.

Asbtract ( 815 )

PDF (438KB) ( 628 )

Related Articles | Metrics

Father of Bacterial Genetics:Joshua Lederberg

GUO Xiao-Qiang

2012, 34(2): 119-124.

Asbtract ( 1236 )

PDF (272KB) ( 1537 )

Related Articles | Metrics

Table of Content