四川省部分地区肠道蠕虫感染现状调查

目的了解近10年来我省部份地区的肠道蠕虫感染现状。方法采用改良加藤厚涂片法检查肠道蠕虫卵,试管滤纸培养法鉴别钩虫虫种,对12岁以下儿童用透明胶纸肛拭法检查蛲虫卵。结果查出肠道蠕虫7种(线虫4种、吸种2种及带绦虫1种)。总感染率为41.34%。蛔虫、钩虫、鞭虫、蛲虫、带绦虫感染率分别为32.60%、17.30%、13.68%、17.55%、0.86%。部份地区感染率以四川盆地南部边缘的合江县为高,总感染率为77.91%,蛔虫47.90%、钩虫43.51%、鞭虫41.65%、蛲虫44.58%;以川西高原的德格县和位于盆地北部边缘的青川县较低。结论10年来部份地区蛔虫、钩虫、鞭虫及带绦虫感染率均有下降趋势,儿童蛲虫感染率有所回升。调查显示,我省肠道蠕虫感染仍十分严重,应积极普及健康教育,采用综合性防治措施,控制肠道蠕虫感染。

四川华川·雅马哈摩托车部品制造有限公司宣告成立

中日合资的“四川华川·雅马哈摩托车部品制造有限公司”于1993年12月9日在日本滨松市正式签定合资合同。这是我国摩托车行业中第一家生产摩托车电器产品的合资企业。该公司由重庆华川机械厂、重庆建设机床厂、日本雅马哈发动机株式会社、日本IIC株式会社四方组成。总投资为1600万美元,主要生产摩托车用磁电机(含发电机。

Study on the Bradybaenid Landsnails in NW Sichuan (Gastropoda:Pulmonata:Stylommatophora)

A new species Pseudiberus (Pseudiberus) maoensis sp.nov.was proposed,and the first dissection study was carried out upon Bradybaena (Bradybaena) pseudocampylaea (Moellendorff),Bradybaena (Bradybaena) sueshanensis Pilsbry,and Bradybaena (Bradybaena) controversa monotaeniata Pilsbry.All examined specimens as well as types are housed in the Institute of Zoology,the Chinese Academy of Sciences,Beijing.

档案馆编研工作与历史研究关系之我见

一段时期以来,有的史学工作者认为,档案馆的大门还没有真正打开,究其主要原因,乃是档案界提倡搞历史研究所致。他们“诉苦”道:档案馆对本馆正在或准备编研的某个专题所涉及的档案文献深藏若虚,拒绝开放;史学工作者提出的研究课题愈明确,愈难得到齐全完整的档案。他们大声疾呼:“一定不能提倡档案工作者搞历史研究。”

Sedimentary environments controlled by tectonics and induced differential subsidence:A perspective in the Permian Liangshan and Qixia Formations,northwestern Sichuan Basin,China

Based on field observation,core description and well logging analysis,the tectonic-sedimentary framework of the Liangshan and Qixia Formations in the northwestern Sichuan Basin,China is deeply discussed.Two long-term sequence cycles were identified,denoted as LSC1 and LSC2,respectively.The sequence stratigraphic framework was established,suggesting the Liangshan Formation to be not isochronously deposited.Paleogeomorphy before deposition of LSC1 was reconstructed by the impression method.LSC1 was featured by thin,low-energy shoal deposits in the high topography,and thick inter-shoal sea and open sea deposits in the low topography.Meanwhile,paleogeomorphy before deposition of LSC2 was reconstructed using the residual thickness method,which was demonstrated to have primary high-energy,thick shoal deposits in the high topography,and thin inter-shoal and open sea deposits in the low topography.The results show that differential tectonic subsidence has already taken place during the Qixia Period,and thus the Dongwu Movement should occur earlier than previously expected.Meanwhile,pre-depositional paleogeomorphy has obvious controlling effects on the sequence stratigraphic filling and sedimentary facies distribution.Results of this study were expected to provide practical guidance to fine characterization of the sedimentary evolution process and prediction of high-quality reservoir distribution.

Wet Canopy Evaporation Rate of Three Stands in Western Sichuan, China

The wet canopy evaporation rate (Er) wascalculated by Penman-Monteith combination model based on three assumptions and with meteorological variables 2 m above the canopy inthree stands, dominated by spruce (SF), fir (FF) and birch (BF) trees, respectively[(,)( )]in the subalpineforests in western Sichuan, China over a growingseason. The total amount of the E was 44.5 mm forSF, 88.5 mm for FF and 57.8 mm for BF, accounting for 9.2%, 16.6% and 10.2% of the gross rainfall,respectively, in the measuring period. There was the highest average monthly Er and percentage of E togross rainfall for FF compared with SF and BF.Mean Er was 0.097 mm h-1 (ranging from 0.028 to0.487 mm h-1), 0.242 mm h-1 (from 0.068 to 0.711 mm h-1) and 0.149 mm h-1 (from 0.060 to 0.576 mm h-1for SF, FF and BF, respectively. The highest average monthly Er occurred in June was 0.120 mm h-1 forSF, 0.317 mm h-1 for FF and 0.169 mm h-1 for BF, and the lowest value in October was 0.083 mm h-1 for SF, 0.187 mm h-1 for FF and 0.101 mm h-1 for BF,respectively. The averages of Er from 8:00 to 16:00were significantly higher than those from 0:00 to8:00 and from 16:00 to 0:00 for the three stands. The marked daily and monthly differences of Er were contributable to the variations of solar radiation, air temperature and relative humidity above thecanopy.

Decreasing Trend in Summer Precipitation over the Western Sichuan Basin since the 1950s

Changing precipitation in the densely populated Sichuan basin may have a great impact on human life. This study analyzes the change in summer precipitation since 1951 over the western Sichuan basin, one of the regions of the heaviest rainfall in China, by using two datasets provided by the Chinese Meteorological Data Center. The results indicate that summer (from June to September) precipitation over the western Sichuan basin shows a significantly decreasing trend. The summer precipitation over this region has decreased by about 20% since the 1950s, with a rate of decrease of about 40 mm per decade.

Direct Climatic Effect of Aerosols and Interdecadal Variations over East Asia Investigated by a Regional Coupled Climate-Chemistry/Aerosol Model

The direct climatic effect of aerosols for the 1980-2000 period over East Asia was numerically investigated by a regional scale coupled climate-chemistry/ aerosol model, which includes major anthropogenic aerosols （sulfate, black carbon, and organic carbon） and natural aerosols （soil dust and sea salt）. Anthropogenic emissions used in model simulation are from a global emission inventory prepared for the Intergovernmental Panel on Climate Change Fifth Assessment Report （IPCC AR5）, whereas natural aerosols are calculated online in the model. The simulated 20-year average direct solar radiative effect due to aerosols at the surface was estimated to be in a range of-9- -33 W m-2 over most areas of China, with maxima over the Gobi desert of West China, and-12 W m-2 to -24 W m-2 over the Sichuan Basin, the middle and lower reaches of the Yellow River and the Yangtze River. Aerosols caused surface cooling in most areas of East Asia, with maxima of-0.8℃ to -1.6℃ over the deserts of West China, the Sichuan Basin, portions of central China, and the middle reaches of the Yangtze River. Aerosols induced a precipitation decrease over almost the entire East China, with maxima of-90 mm/year to -150 mm/year over the Sichuan Basin, the middle reaches of the Yangtze River and the lower reaches of the Yellow River. Interdecadal variation of the climate response to the aerosol direct radiative effect is evident, indicating larger decrease in surface air temperature and stronger per- turbation to precipitation in the 1990s than that in the 1980s, which could be due to the interdecadal variation of anthropogenic emissions.

Relation between structural evolution of the Longmenshan orogenic zone and sedimentation of its foreland basin

In order to determine the area for oil and gas exploration in China’s north Sichuan basin,we have divided the time during which the Longmenshan foreland basin was formed into five periods,based on the sedimentary response relationship of the foreland basin to structural evolution: 1) a late Triassic Noric period;2) an early-Middle Jurassic period;3) a late Jurassic to early Cretaceous period;4) a late Cretaceous to Paleogene-Neogene period and 5) the Quaternary period. As well,we analyzed the sedimentary environment and lithologic features of every basin-forming period. The results show that there are several favorable source-reservoir-cap assemblages in our study area,making it a major region for future oil and gas exploration in China’s northern Sichuan basin.

Concerning about the threat of the excessive hydropower exploitation on the Western Sichuan eco-environment

The concept that the economic development and supremacy hydropower energy are superior to any others leads to the excessive hydropower exploitation of the west Sichuan, deeply threatening the fragile eco-environment in this area and that of the whole Yangtze River and even of the whole country simultaneously. The present paper put forward that hydropower should be developed with ecological, social, and economical concern. The primary, extensive, circling-developing development model should be altered immediately, and that based on caring about eco-environment, being harmonious to the regional eco-environment should be highlighted, and sustainability of hydropower should be paid attention to.

Crustal Deformation Derived from GPS in the Chinese Mainland from 1991-2004

Based on GPS data from 1991- 2004 and the least-squares collocation method,we analyze the crustal deformation in the Chinese mainland. The results show that the first-order crustal deformation is unchanged in different periods in the Chinese mainland,which reflects the background of regional tectonic activity. The strain rate is much higher in Western China,especially in the Qinghai-Tibetan Plateau and Sichuan-Yunnan area. The variations in different periods are related with seismicity of strong earthquakes during the same time. The GPS data after 2004 shows the post-seismic deformation of the 2001 Kunlun Mountains M S8. 1 earthquake.

待重建，美好新家园!——地震前的四川阿坝藏族羌族自治州自然风光回眸

这是记者于去年夏天赴四川部江堰、汶川、茂县等地沿途所拍的一组阿坝藏族羌族自治州的自然风光照片。5.12汶川大地震,使这些风景如画的山川改变了模样,每当看到这些照片,我的心里就会隐隐作痛,痛彻心肺,为在汶川大地震中不幸遇难的骨肉同胞而哭泣,为秀美山川遭此灾难而心痛。唯愿逝者安息,生者坚强。正如我们的温总理所说的那样,只要人在,我们依然可以重建美好家园。汶川加油!中国加油!

水力电力部七局2003年度政研年会召开

水电七局2003年度政研年会前不久在四川郫县召开。局党委副书记、局纪委书记逯建华在会上讲话。局属10个政研分会负责人及有关领导参加了会议。

省社科联科普部组团赴山东省考察学习

为了拓宽视野，学习借鉴兄弟省市的先进经验，开创我省社科普及工作新局面，省社科联科普部于7月27日至8月1日组织部分市州社科联、省级学会、协会、研究会的同志赴山东省考察学习。考察期间，与山东省社科联党组分管领导和科普部的全体同志进行了座谈，通过座谈、交流、走访调研等活动，使我们开阔了视野，拓宽了思路，增强了进一步做好社科普及工作的信心。

省社科联科普部组团赴华东地区学习考察

为拓展视野，学习借鉴沿海经济发达地区开展社科普及工作的先进经验，推动我省社普及工作向深度和广度发展，6月27日至7月1日，省社科联科普部组织部分市州社科联、省级学会十二位同志赴浙江、江苏。

“大通河”勾起的往事

《中国钓鱼》是我多年的挚友。当看到1993年第二期《答钓友》栏目中介绍的在“大通河”钓的那种鱼和照片,当即勾起我几年前的一段钓事。 大通河在我省互助县境内的一段,是在互助县北山的那一边,离我们西宁市100多公里。近年来北山林场已被国家定为森林旅游区,那的确是个山青水秀的好地方。乘车离开互助县城沿着盘山路行驶翻过一座山就来到了北山林区,这里风景迷人,山青水秀,古树苍天,奇山怪石,小渠纵流。

Evolution of terraces Ⅰ–Ⅲ along the Anning River, western Sichuan, based on pollen records and terrace structure

This study reconstructs the long-term evolution of river terraces over large spatial scales along the Anning River, western Sichuan, and identifies external factors controlling terrace formation. Pollen record analysis and terrace structure indicate that formation of the middle section of terraces I-III resulted from the interaction of changing climates and uplift of the margins of the Qinghai-Tibet Plateau. The relative influence of climate and uplift in terrace formation changes in different periods. The terraces reveal multiple, gradual uplift events on the eastern Qinghai-Tibet Plateau, which is of great significance for determining uplift mechanisms across the entire plateau.

Temporal and spatial analysis of changes in snow cover in western Sichuan based on MODIS images

We developed a method for analyzing the change in snow cover using MODIS imagery.The method was applied to images of western Sichuan Province,China taken between 2002 and 2008.The model for extracting data on snow cover from MODIS images was created by spectral analysis.The multi-temporal snow layers were used to evaluate the temporal and spatial change in the area under snow cover between 2002 and 2008 using overlay and statistical analysis in ARCGIS.The majority(60.4%) of western Sichuan was rarely covered by snow and only 0.3% was covered by perennial snow in 2002.Snow cover was pri-marily distributed in Garzê and Aba.The area under snow cover was significantly and negatively correlated with the average monthly temperature and rainfall in 2002.The largest area under snow cover was measured in 2006 and the smallest was in 2007.Similarly,the area of snowmelt was the highest in 2006 and lowest in 2007.In general,the elevation of the snow line in-creased throughout the period 2002-2008;however,the elevation decreased in some years.Our results provide an important insight into the distribution of snow in this region,and may be useful for climate modeling and predicting the availability of water resources and the occurrence of floods and droughts.

Geothermal data analysis at the high-temperature hydrothermal area in Western Sichuan

The western Sichuan hydrothermal area is located at the northeastern margin of the eastern syntaxis of the Qinghai-Tibet Plateau, which is also the eastern end of the Mediterranean-Himalayan geothermal activity zone. There are 248 warm or hot springs in this area, and 11 have temperatures beyond the local boiling temperature. Most of these hot springs are distributed along the Jinshajiang, Dege-Xiangcheng, Ganzi-Litang, and Xianshuihe faults, forming a NW-SE hydrothermal belt. A geothermal analysis of this high-temperature hydrothermal area is an important basis for understanding the deep geodynamic process of the eastern syntaxis of the Qinghai-Tibet Plateau. In addition, this study offers an a priori view to utilize geothermal resources, which is important in both scientific research and application. We use gravity, magnetic, seismic, and helium isotope data to analyze the crust-mantle heat flow ratio and deep geothermal structure. The results show that the background terrestrial heat flow descends from southwest to northeast. The crustal heat ratio is not more than 60%. The high temperature hydrothermal active is related to crustal dynamics processes. Along the Batang-Litang-Kangding line, the Moho depth increases eastward, which is consistent with the changing Qc/Qm(crustal/mantle heat flow) ratio trend. The geoid in the hydrothermal zone is 4–6 km higher than the surroundings, forming a local "platform". The NW-SE striking local tensile stress zone and uplift structure in the upper and middle crust corresponds with the surface hydrothermal active zone. There is an average Curie Point Depth(CPD) of 19.5–22.5 km in Batang, Litang, and Kangding. The local shear-wave(S-wave) velocity is relatively low in the middle and lower crust. The S-wave shows a low velocity trap(Vs<3.2 km s.1) at 15–30 km, which is considered a high-temperature partial melting magma, the crustal source of the hydrothermal active zone. We conclude that the hydrothermal system in this area can be divided into Batang-type and Kangding-type, both of which rely on a crustal heating cycle of atmospheric precipitation and surface water along the fracture zone. The heat is derived from the middle and lower crust: groundwater penetrates the deep faults bringing geothermal energy back to the surface and forming high-temperature springs.

The coupling of fluid flow and uplift since Late Cretaceous in Zoige area, western Sichuan

The uplift indicated by five AFT (apatite fission track) samples is more than 3400 m by multi-episodic uplift since Late Cretaceous in Zoige area; especially the processes of fast uplift in Late Cretaceous and Neogene have important influences on the stress of paleo-fluid. Based on field geology, macroscopic features of fracture, and geochemistry of fluid inclusions, we decipher the paleo-fluid process of episodic migration. In early uplift stage, the temperature of inclusions increased with the constant salinity, whilst both of them proportionally decreased in the mid-late stage, indicating the different tendency of heat-fluid warming and freshwater contamination at different time. Of particular importance are the features of episodic fluid flow, such as ESR ages, and features of multi-episodic migration that correspond well with the process of multi-episodic uplift. Thus, concerning the rock stress-strain behavior responding to uplift, we further discuss the spatio-temporal coupling effect of episodic migration and decompression in multi-episodic uplift, thereby to better understand petroleum geology in the region.