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区长期
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  in the long time
     Study on the composition of weed seed species in the long time rice wheat rotation fields
     沿江圩区长期稻麦连作田土壤杂草种子库的研究
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  “区长期”译为未确定词的双语例句
     The effect of different fertilization on the content and distribution of mi neral N in soil profiles was investigated in the gully area of Loess Plateau.
     在黄土高原沟壑区长期施肥对土壤剖面中的 NH4- N、NO3 - N含量分布影响不同。 长期不同施肥处理对 NH4- N含量和分布保持相对稳定 ;
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     In addition, 5 midstrong earthquakes occurred in Tengchong county town in 1512~1785 3. long strain release in the area shows stable.
     另外,腾冲县城1512~1785年曾发生5次中强地震。 (3)该区长期应变释放相当平缓。
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     On the basis of geological facies and seismic facies analysis, five high-resolution sequence stratigraphy models have been established.
     在地质相和地震相分析的基础上,建立了研究区5个古地貌单元的馆陶组河流相沉积高分辨率层序地层模型,总结了研究区长期基准面上升和下降半旋回的沉积体系综合模式。
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     The composition of weed seeds in the longtime rice wheat rotation fields in Jiangyu district, Anhui province were studied, the results showed that there were 8 familia, 14 species of weeds in wheat fields, 9 familia, 17 species of weeds in rice fields.
     通过对沿江圩区长期稻麦连作田土壤杂草种子库研究,结果表明,土壤杂草种子库中小麦田有8科14种、水稻田有9科17种。
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     The accuracy and resolution of satellite gravity data have been greatly improved along with the development of space technology. In this paper, satellite gravity anomaly is calculated to be 2~360 order for the region(32°~37°N,120°~126°E) in the South Yellow Sea using NASA EGM96 Geopotential Model. According to the features of satellite gravity anomaly, the satellite gravity anomalies of the South Yellow Sea can be divided into eight regions.
     利用美国国家航空航天局1998年公布的EGM96全球重力模型,计算了南黄海区32°~37°N、120°~126°E范围内的2~360阶卫星重力场,分析了该区的卫星重力异常场特征,将南黄海区的卫星重力异常划分为8个异常区,长期的板块运动结果控制了该区的重力异常格局。
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     Long-term forecast of summes's chilling damage in Northeast China
     东北夏季低温冷害的长期预报
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     STUDY ON THE EFFECT OF LONG-TERM FERTILIZATION IN DOUBLE RICE CROPPING SYSTEM OF SOUTHERN ANHUI
     皖南双季稻长期施肥效应研究
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     Culture Region
     文化
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     The line density and area density have been counted.
     的密度。
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     Long-Lived Assets
     长期资产
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  in the long time
A Markov approximation is valid only in the long time region, non-Markovian transients cannot be neglected.
      
In the long time region the non-equilibrium state of the bath has the same effect as a modified macroscopic initial condition for the B.p.
      
In addition, we studied deterministic diffusion on finite sets and obtained analytic expressions for the mean square displacement in the long time limit.
      
The distribution function for Brownian motion of a parametric oscillator is calculated exactly with the help of continued fraction expansions in the long time limit.
      
In the long time limit a universal growth rate as is observed for the radius of the droplet for all models independent of the boundary conditions.
      
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Beishan Mt.is the eastern extension of Tianshan Mts.Where the Upper Precambrian is well developed with continuous outcrops,rather complete succession,abundant stromatolites and typical glacial deposits.It possesses some characteristics of the two Upper Precambrian stratotypes in China, i.e.the Jixian and the Yangtze Gorge sections,and can be regarded as one of the best developed region of the Upper Precambrian in China. A complete Upper Precambrian succession had been compiled to form a space-time continuum...

Beishan Mt.is the eastern extension of Tianshan Mts.Where the Upper Precambrian is well developed with continuous outcrops,rather complete succession,abundant stromatolites and typical glacial deposits.It possesses some characteristics of the two Upper Precambrian stratotypes in China, i.e.the Jixian and the Yangtze Gorge sections,and can be regarded as one of the best developed region of the Upper Precambrian in China. A complete Upper Precambrian succession had been compiled to form a space-time continuum from four representative sections namely,Baihu,Ping- toushan,Dahuoluoshan and Hongshankou,then,this succession is divided into four Systems(Groups)and twelve Formations according to lithological character,sedimentary cycle,biotic assemblage,crustal disturbances,glacia- tion,geochemistry and ore-bearing horizons.The total thickness is larger than 8200 m.The features of these stratigraphic units are briefly given in ascending order as follows: The Baihu Group:This Group is composed of littoral-neritic sediments which have suffered low to medium grade metamorphism and it is assigned to Changcheng System.Its rocks.are originally,from base to top,coarse fragmental,carbonate and argilliaceous sediments intercalated with volca- nics in the upper part.These rocks constitute a complete sedimentary cycle and can be divided into four Formations.They yield stromatolites(Kussie- lla-Conophyton Assemblage I)in the upper part and are more than 3269 m in thickness with base being hidden. The Pingtoushan Group:It corresponds to the Jixian System and belongs to tidal flat sediments comprising mainly carbonate of littoral to neritic fa- cies,intercalated with clastics.It can be subdivided into three Formations and contains abundant stromatolites(including Canophyton-Pseudocryptozoon- Baicalia Assemblage Ⅱ,Cryptozoon-Jacutophyton-Baicalia-Petaliforma Assem- blage Ⅲ,Omachtenia-Tielingella-Conophyton Assemblage Ⅳ).It is marked by disconformable contact with the Baihu Group,locally even by angular contact. It has a thickness of 3075 m. The Dahuoluoshan Group:This Group is also tidal flat sediments of littoral to neritic facies,and consists mainly of carbonate rocks with minor clastic and chert beds It comprises three Formations—the lower,the middle and the upper,all being rich in stromatolites(containing Conicodomenia-Jacutophyton- Cono ph yton-Clava ph yton Assemblage Ⅴ ,Jacutophyton-Boxonia-Gymnosolen-Xin- jiangella Assemblage Ⅵ,Inzeria-Linella Assemblage Ⅶ,and Giganstraticonus -Conophyton-Coronaconophyton-Spicaphyton Assemblage Ⅷ).Its contact with Pingtoushan Group displays an unconformity or a disconformity,totaling 1575 m in thickness.This Group is referned to Qingbaikou System. The Hongshankou Group,This Group is composed mainly of glacial deposits having a thickness of 315 m.It overlies the Dahuoluoshan Group unconformably and underlies the lower Cambrian disconformably.It is divisible into lower and upper Formation.The lower Formation is referred to tillite with plenti- ful evidences,e.g.striated pebbles,erratics,especially dropstones from flo- ating ice.But the upper Formation is made up chiefly of clastics,intercala- ted with carbonates and manganese ore-beds,containing microflora and sponge spicules. From the above mentioned data the Baihu,Pingtoushan and Dahuoluo- shan Groups can basically be correlated with the Jixian Section;the Hong- shankou Group may well be analogous to the XiadongSection,but the Deng- ying Formation in the upper part and the Liantuo Formation in the lower part are lacking.Taking the whole stratigraphic style and sedimentary chara- cteristics into account,the Upper Precambrian is rather similar to that of South Urals. It is noteworthy that a stromatolite assemblage which may represent a higher horizon is particularly developed in the upper Formation of the Da- huoluoshan Group.Whether it belongs to a hiatus above the Qingbaikou Sys- tem or makes up another type of sediments of the Lower Sinian is still a pending problem for further study.This assemblage is distinguished by vari- ous conical stromatolites and their derivation type with giant strata-conical stromatolite in the lower part and repeated appearance of the conical columns of unbranehing to varied branching type in the upper part.These columns observed at this locality are preserved by silification,early diagenetic silica having replaced most,or virtually all,of the carbonate of which they were originally composed,after leaching out of enclosing light gray dolomite, these columns protrute from weathered rock surface and occur as“rivet-li- ke”mounting into the dolomite(so called“rivet structure”).It is so distinct in aspect and stable in horozon that somegeologists often use it as guide for stratigraphic correlation. In this article stromatolites collected from the main sections of the study area in Beishan have been studied in detail.The authors have referred to Zhao Wenjie,Miao Changquan,Gao Zhenjia and another positive result in this research book in recent years and are deeply indebted to Liang Yuzuo for his kind direction.Stromatolites described here comprise 28 Groups(Genera) and 70 Forms(Species),among which 7 Groups and 28 Forms are new.

本报告系统地介绍了北山地区所建立的晚前寒武纪地层系统和剖面。根据岩石特征、沉积旋回、生物组合、地壳运动、冰川作用、地球化学和同位素地质年龄等,将其划分为四个系(群)和十二个组。分别论述了各群、组的主要特征、重要地层界线及时代划分与对比;探讨了该区晚前寒武纪古地理概况。尤其是着重解决了该区长期悬而未决的青白口系问题。提出了该区上前寒武系可分别与我国蓟县和峡东以及苏联的南乌拉尔剖面进行对比.本研究报告是对北山地区上前寒武系研究较系统而全面的总结。经地质矿产部科技司和中国地质科学院组织的评审认为,该报告“较大地提高了研究地区的地质研究程度,是一份较有价值的研究成果”.可供地质普查勘探、教学和科研人员参考.

After the analysis of the parameters time,space,and intensity of seismic activity in seismic areas of some large historical earthquakes of M≥7 in the inland areas of China,it was found that in many large earthquake areas,after the elapse of several decades,or hundreds of years to even nearly one thousand years,there was still activity of many small earthquakes; sometimes intermediate strong earthquakes occurred; and even recurrent large earthquakes which were comparable to the main shocks also occurred. Here,according...

After the analysis of the parameters time,space,and intensity of seismic activity in seismic areas of some large historical earthquakes of M≥7 in the inland areas of China,it was found that in many large earthquake areas,after the elapse of several decades,or hundreds of years to even nearly one thousand years,there was still activity of many small earthquakes; sometimes intermediate strong earthquakes occurred; and even recurrent large earthquakes which were comparable to the main shocks also occurred. Here,according to the statistical analysis of seismic areas of 17 earthquakes of M≥8 and 37 earthquakes of M≥7,we have proposed the concept of "long-term activity" in a large earthquake area. This conepet was supported by observational facts in large earthquake areas after establishment of local seismic networks one after another in the middle of the 60's and particularly since 1970. In this paper,besides briefly discussing the physical significance of the "long-term activity",the practical significance of such "long-term activity" in seismic trend predication was further illustrated by some concrete facts.

本文通过对我国内陆地区历史上的一些7级以上大震区地震活动的时、空、强分析后,发现许多大震区时过几十年、几百年乃至近千年,都还有不少的小震活动,有时竟然出现了中强地震,甚至还有与主震震级相当的复发性大地震发生。这里根据我国内陆地区17次8级以上地震和37次7级以上地震区的统计分析后,提出了大震区的“长期活动”概念。这个概念得到了六十年代中期全国陆续设立区域台网后,特别是1970年以来对大震区的观测事实的支持。 本文除简单地讨论了“长期活动”的物理意义外,进一步用一些具体事实说明了这种“长期活动”在趋势预报工作中所具有的现实意义。

The microtopography and composition of V_2O_5TiO_2/α-Al_2O_3 catalysts before and after selective oxidation of hydrocarbons were investigated using scanning electron microscope(SEM)and energy dispersive spectrometer (EDS). It is observed that after prolonged heating of the catalysts at the hotpoint region in the reactor, the sodium ions in the adhesive used for the preparation of the carrier migrated to the catalyst surface and reacted with the active componet forming needles ofsodium vanadate, and thus affecting...

The microtopography and composition of V_2O_5TiO_2/α-Al_2O_3 catalysts before and after selective oxidation of hydrocarbons were investigated using scanning electron microscope(SEM)and energy dispersive spectrometer (EDS). It is observed that after prolonged heating of the catalysts at the hotpoint region in the reactor, the sodium ions in the adhesive used for the preparation of the carrier migrated to the catalyst surface and reacted with the active componet forming needles ofsodium vanadate, and thus affecting the catalyst performance.

用扫描电镜和能谱仪对V_2O_5-TiO_2/a-Al_2O_3催化剂反应前后的显微形貌和组成进行观察和分析,观察到催化剂由于在反应器热点区长期受热,制备载体所用粘结剂成份中的钠离子向催化剂表面迁移,与活性组份作用,形成钒酸钠针状物,从而影响了催化剂的反应性能。

 
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