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central region     
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  中部地区
     The grain yield and grain productivity were found to be 5372 kg/hm2 and 7462 kg/hm2 in Eastern Region with high input of fertilizers, to be 4940 kg/hm2 and 7216 kg/hm2 in the Central Region with middle input of fertilizers, and to be 3844 kg/hm2 and 5470 kg/hm2 in the Western Region with low input of fertilizers.
     中部地区(中等施肥水平)的粮食单产和生产潜力居中,分别为4940kg/hm2和7216kg/hm2; 西部地区(低施肥水平)的粮食单产和生产潜力最低,分别为3844kg/hm2和5470kg/hm2。
短句来源
     It was indicated that potential of grain productivity increase per sowing area was 754 kg/hm2 in the Central Region that was lower than that in the Western Region (948 kg/hm2) and higher than that in the Eastern Region (714 kg/hm2).
     按播种面积计算,粮食单产的增产潜力以西部地区最高,平均达948kg/hm2; 东部地区局中,平均为754kg/hm2,中部地区则相应较低,为714kg/hm2。
短句来源
     By means of a regional reconnaissance of U and ~(210)Po contents in sediments of drain(?) e system in central region, Inner-Mongolia, within an area of about 60000km_2, 104 anomalies of U and 296 anomalies of ~(210)Po were discovered, and 210 halos of uranium anomaly and 144 halos of ~(210)Po anomaly were delineated.
     通过对内蒙中部地区水系沉积物U、~(210)Po的区域概查,在约60000km~2范围内,发现了104个U异常点,296个~(210)Po异常点,并圈出了U异常晕圈210个,~(210)Po异常圈144个。
短句来源
     An Empirical Analysis of the Industrial Structure and Employment Structure in Central Region of China
     中国中部地区产业结构与就业结构的实证分析
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     The Shiyan section of No. 316 national highway (K1549+850~ K1582+120) is the main road from Xiangfan to Shiyan in Hubei province, which also is the important passage from Shiyan to the central region.
     316国道十堰段(K1549+850~K1582+120)为湖北省襄樊市至十堰市的主要道路,是十堰市通往中部地区的重要通道。
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  中央区
     Results The MLD in the invasive front (19.64±7.21) was significantly higher than that in the central region (5.64±2.87) (P<0.05).
     结果结直肠癌前缘区MLD(19.64±7.21)高于肿瘤中央区MLD(5.64±2.87)和正常黏膜MLD(13.30±3.06);
短句来源
     Results: Corneal foreign bodies involved central region 65 eyes,border region 95 eyes,A 94 eyes,B 33 eyes,C 15 eyes and D 18 eyes.
     结果:角膜异物累及角膜中央区65眼,周边区95眼,A级94眼、B级33眼、C级15眼、D级18眼。
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     Results:1. In the central region the N_1-P and P-N_2 amplitudes of mfVEP of the strabismic amblyopic and anisometropic amblyopic eyes were reduced compared with the fellow eyes and the normal eyes.
     1.斜视性弱视和屈光参差性弱视mfVFP的N_1-P振幅和P-N_2振幅在中央区较对侧眼和正常对照组降低;
短句来源
     In the central region the N_1-P and P-N_2 amplitudes of mfVEP of the inisometropic amblyopic eyes were reduced compared with the normal eyes.
     屈光不正性弱视N_1-P振幅和P-N_2振幅在中央区较正常对照眼降低,其差异均有统计学意义。
短句来源
     Diagnosis and treatment of 20 cases of parasagittal meningioma of the longitudinal sinus and falx in the central region
     中央区矢状窦旁和大脑镰旁脑膜瘤20例的诊断与治疗体会
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  中心区
     The estimated electron temperatures arc around 3.6, 5.6, 7.3, 10.8 and 21 eV, respectively at 0.36, 0.56, 0.66, 0.90 and 1.4 ms after the start of discharge, which indicate the plasma temperature in central region.
     估算得到的电子温度在放电开始后0.36,0.56,0.66,0.90和1.4ms,分别为3.6,5.6,7.3,10.8和21eV,它们反映了放电初期等离子体中心区电子温度的变化。
短句来源
     4 cases(4.7%) were in the region covered by probe 4~5a in central region of the gene.
     仅4例(4.7%)缺失分布于基因的中心区
短句来源
     Results In the hyperacute group, the NAA/Cr, Lac/Cr between central region and marginal region were shown significant difference (P<0.001).
     结果 超急性期和急性期脑梗死病灶中心区NAA/Cr、Lac/Cr与边缘区存在显著差异(P <0 .0 0 1)。
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     Physics Design on the Axial Injection System and the Central Region of the 100MeV High Intensity Cyclone
     100MeV强流质子回旋加速器轴向注入系统和中心区物理设计
短句来源
     The total biomass of street trees was equal to that of 19hm2 forest,6-8 hm2 forest should be planted in the central region.
     中心区应增加6~8hm2林地面积。
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  中心区域
     Luminosity Functions for the Member Galaxies in the Central Region of Abell 2634
     Abell2634中心区域成员星系的光度函数
短句来源
     Gray levels of pixels in central region of each amplitude spectrum were input to classifiers based on BP networks,LVQ1 networks and LVQ2 networks as features. Experiments show that classification results of LVQ2 networks are satisfactory.
     将幅值谱中心区域内的像素灰度值作为特征量,分别输入给BP网络、LVQ1网络、LVQ2网络所构建的分类器模型,试验表明LVQ2网络能够得到理想的分类效果。
短句来源
     The Primary Role of Central Region of HC-Pro of Potato Y Potyvirus in Synergism of Plant Viruses
     马铃薯Y病毒HC-Pro中心区域在病毒协生作用中的主导地位
短句来源
     Furthermore,infection test demonstrated that the central region of PVY\|C HC\|Pro can mediate synergism of PVY\|C/cucumber mosaic cucumovirus (CMV) and PVY\|C/potato X potexvirus (PVX),identifying that it is functional domain in synergism.
     侵染性试验发现HC Pro中心区域介导转基因烟草中PVY C和黄瓜花叶病毒 (CMV)、PVY C和马铃薯X病毒 (PVX)之间的协生作用 ,从而明确了PVY CHC Pro中心区域为病毒协生作用的功能区域
短句来源
     when it equals π/2, there is the fluorescence and two-peak structure appear in the central region;
     当相对相位差变到π/2时,荧光产生且中心区域出现双峰结构;
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  central region
By analyzing the surface energy configuration of the ionic clusters in a Nafion membrane, an equivalent field intensity, Ee, was introduced to facilitate the analysis of surface resistance against ion conduction in the central region of clusters.
      
The singularity at this point can be eliminated by including dissipative factors in the treatment; it is then possible to use standard difference methods in the hot central region.
      
The structure of the central region of silicon nanoparticles is studied in detail by constructing Voronoi polyhedra, which make it possible to determine the mean length of bonds and their number.
      
The accuracy of coordinate measurements at the central region of the detector with this algorithm is ~10 mm.
      
Radiation Loads of the Detectors for the Central Region of the LHCb Experiment at LHC
      
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This paper consists of three parts. In the first part the 16-dish E-W interferometer of the Mi-Yun Station,Pe- king Observatory(working frequency 146 MHZ)is decribed.Measured instrumental parameters are compared with theoretical ones.Thus the measured beamwidth was 5′.4(5′.3 theoretical),the first sidelobe level amounted to 5%(4.5% theoretical)and the locations of grating lobes in the celestial sphere were very close to the theoretical positions.These show that the surveying of baseline,the installation of antennas...

This paper consists of three parts. In the first part the 16-dish E-W interferometer of the Mi-Yun Station,Pe- king Observatory(working frequency 146 MHZ)is decribed.Measured instrumental parameters are compared with theoretical ones.Thus the measured beamwidth was 5′.4(5′.3 theoretical),the first sidelobe level amounted to 5%(4.5% theoretical)and the locations of grating lobes in the celestial sphere were very close to the theoretical positions.These show that the surveying of baseline,the installation of antennas and the adjustment of transmission lines are reasonably accurate in our case. The observations of the quiet sun and the slowly varying component are described in the second part.In contrast to the results obtained by some authors(e.g.by O'Ob- rien),we found that the apparent diameter of the meter-wave sun had not varied during the descending phase of the solar cycle. In the third part of this paper the results of measurements of type-Ⅰ sources are analyzed.According to the rate of occurence of type-Ⅰ bursts,the sources are classified into four classes.It is found that(1),the average height above photosphere of so- urces of all classes as measured at the central region of the solar disc was 0.24-R_⊙;(2), the E-W distribution of sources was asymmetric with respect to the solar meridian,in agreement with the result of Fokker;(3),the frequency distributions over the solar disc were different for sources of different classes.The sources containing more type- I bursts decreased more rapidly than the continuum sources with respect to the height;(4),the correlation between the commencement of noise storms with the appearance of optical flares seemed to be rather weak.This differed from the result of Mallinge; and(5),the occurence of noise storm sources was closely connected with the mean flare index of the plage region.As shown in fig.10,for all plage regions asso- ciated with large sunspots and strong magnetic fields,the mean flare index had an average value of 14.33(light solid line,fig.10),among these regions for those also containing meterwave sources,this value rose up to 27.15(heavy solid line,fig.10), while for those which did not possess meter-wave sources,the average index was 7.32 (Chain line).

全文分三部分:第一部分描述了北京天文台密云工作站的东-西16面天线干涉仪系统(工作频率146兆赫),并将仪器参数的实测结果与理论予期值相比较.第一旁瓣5%,瓣宽5.4.方向瓣在天球上的位置也都与理论预期相差不大.第二部分描述了宁静太阳及其缓变成分的观测.在太阳活动下降期没有发现米波太阳视直径的变化.第三部分分析了 I 型源的观测结果.米波源的高度我们测定在过日心径时为光球之上0.24R☉.检查不同类型噪暴源按日心径的分布,得出随着高度的增加 I 型源的噪暴成分比起连续的增强辐射下降得要迅速.在与光学现象的对应上,噪暴的起始似乎与耀斑的发生的相关性不强.噪暴源却与谱斑区的平均耀斑指数有密切关系.

To study the crustal structure of the southern part of Liaoning Province, whichis the geological background of the occurrence of the Haicheng (海城) Earthquake,M=7.3. The available gravity data of the region and the method of "compressedmass plane" suggested in this paper were used to compute the depth of the MohorovicicDiscontinuity, from gravity anomalies after removing the effect of the superficialsedimentary layers and shallow geological structures. In addition, the principle of"density difference" was adopted...

To study the crustal structure of the southern part of Liaoning Province, whichis the geological background of the occurrence of the Haicheng (海城) Earthquake,M=7.3. The available gravity data of the region and the method of "compressedmass plane" suggested in this paper were used to compute the depth of the MohorovicicDiscontinuity, from gravity anomalies after removing the effect of the superficialsedimentary layers and shallow geological structures. In addition, the principle of"density difference" was adopted to separate the effect of the Conrad Discontinuityfrom the gravity anomaly, in order to estimate the depth of the Conrad Discontinuity. The distribution of these two discontinuities in southern Liaoning Province wasobtained, basing on the results of computations of 13 gravity profiles. Accordingto the relief of the Mohorovicic Discontinuity, this part of the Liaoning Provincemay be divided into three elongated regions, northeast-southwest in direction: thecentral, southeastern and northwestern. The central region is an uplift of theupper mantle, lowering toward the northeast and extending southwestward into theBohai Gulf. Its southeastern flank is much steeper than the northwestern flank,both sides slope down more or less in steps. On this large tectonic background, aseries of secondary structures of considerable size are located. The thickness of crust on this uplifted region is 31-32 kilometers, but it be-comes about 30 kilometers along the eastern edge. In the southeastern region, thecrustal thickness is 34-35 kilometers in general, maximum, 38 kilometers. In thenorthwestern region, the crustal thickness increases toward northwest, from 34 to 40kilometers. The Haicheng Earthquake occurred on the steeper southeastern slope ofthe central uplifted region. In this paper, a brief description of the methods of computation is also givenand some problems are discussed.

为了研究辽宁省海城7.3级地震发生的地质背景——辽南地区的地壳构造,根据已有的反映深部界面起伏的重力资料,以及本文提出的方法除去新生代沉积和浅部构造影响后的重力异常,用等效压缩质面方法计算莫霍界面深度。并采用密度差异的原理,从重力异常中分解出康拉界面的影响,从而求得康拉界面的深度。根据13条计算剖面的结果,给出辽南地区的康拉界面和莫霍界面的分布。根据莫霍界面的起伏,此地区大致可划分为三个部分。中部:为一北东向的上地幔隆起带,北低南高,一直向西南延伸入渤海。隆起的东南坡陡,西北坡缓,且呈台阶式次第下倾。在此大的构造背景上展布了一系列具有相当规模的次一级正、负构造。地壳厚度在隆起部分为31—32公里,但其东缘较薄,约为30公里左右。东南部:地壳厚度一般为34—35公里,最大可达38公里.西北部:地壳厚度向西北方向由34公里逐渐增至40公里左右。海城地震就发生在中部隆起带的较陡的东南坡上。 文中对有关的计算方法作了简要的介绍。并对一些问题进行了讨论。

This paper deals with characters of time-space variation of the eastern Asia continent magnetic field (EACMF) during last thirty years. EACMF is the non-dipole field in this region.The magnetic field intensity of EACMF at each station is the difference between the normal field and the central dipole field. The normal field is computed according to taylor polynomial (n=3). The central dipole field is computed according to IGRF (n = 1). We had determined the centre (1970.0) of EACMF at (?)=44°N and λ=102°E. The...

This paper deals with characters of time-space variation of the eastern Asia continent magnetic field (EACMF) during last thirty years. EACMF is the non-dipole field in this region.The magnetic field intensity of EACMF at each station is the difference between the normal field and the central dipole field. The normal field is computed according to taylor polynomial (n=3). The central dipole field is computed according to IGRF (n = 1). We had determined the centre (1970.0) of EACMF at (?)=44°N and λ=102°E. The centre's magnetic field intensity was 17 690 γ, and the magnetic field direction was vertical down.We have studied the secular change of EACMF by the data including eleven geomagnetic observatories of this region and many repeat-survey stations near the central region of EACMF. We have found the following characters of the secular change of EACMF.a. A character of the seculer change of EACMF shows that no west-ward drift is taken place, b. The centre of the secular change of EACMF did not correspond to the centre of EACMF itself, and another weaker centre of secular change was situated under the east part of Qing Hai-Tibetan plateau region.

本文利用近三十年来的地面测量资料和东亚地区11个地磁台的资料,以及1965.0、1975.0国际地磁参考场等资料,对东亚大陆磁场的时、空变化特征进行了研究。内容包括:东亚大陆磁场的空间分布特征及场源深度的估算,东亚大陆磁场的中心位置及其磁场强度、磁场方向,近三十年来东亚大陆磁场的长期变化特征等。得到的主要结果是:1.东亚大陆磁场的中心位置近三十年来没有西向漂移的迹象,从而推断它的长期变化主要由场源强度的变化所引起,而不是主要由非偶场的西向漂移所引起;2.东亚大陆磁场的中心与它的长期变化的中心不相一致,同时,在青藏高原的东部还可能存在一弱中心。

 
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