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     At the mesh surface, the constant and the simplified 6P 1 approximation are invoked for the anisotopic angular distribution.
     子区内中子源采用各向同性平源分布 ,子区表面通量在方向上采用简化 6P1近似 .
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     The mathematical model of two-dimensional calculation of neutron flux distribution in the hexagonal fuel assembly by using the interface current method is described in this paper, based on neutron integral transport equation.
     讨论了用界面流方法计算二维六角形组件中子通量分布。 从积分输运方程出发,导出了一种简便的数学模型,在子区内采用平源通量近似,并假设中子发射和散射为各向同性。
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     The paper comprehensively evaluate s the quality of water resources in th e marsh pro-tection area of Song -Nen plain,analyses the character and the cause of wa ter pollution,puts for-ward the management and the protective countermeasure of water resources for the balance between the social development and the marsh protection
     本文综合评价了松嫩平源湖泡典型湿地保护区水资源质量,分析了水质污染特征及原因,提出了水资源管理与保护对策措施,以求达到社会发展和湿地保护之间的平衡。
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     This paper submit some methods of rainwater pipeline combining with geography feature, such as the pipe diameter determination and pipeline embed are conducted separately, hydraulic calculation adopts unitary hydraulic gradient, the pipeline embed adopts unitary setter slope, advocating plain joint and spout covering and so on.
     本文结合河网平源地区的水文地理特点,提出了雨水管道设计中管径确定与管道埋设分别独 立进行,水力计算采用统一的水力坡降,管道埋设采用统一的安装坡度,以及提倡管底平接等设计思想与计算 方法。
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     The inte-rior source is assumed to be isotropic in angular distribution and constant in spatial distribution. The surface angular flux is assumed to be with simplified 4P1 approximation in angle and average in space.
     网格子区内部中子源采用平源分布,子区界面中子角注量密度空间分布设为均匀,角度分布采用简化4P1近似,并采用一种按照非结构网格编码顺序进行网格扫描的新方法。
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     Designer Yu Ping
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  flat source
Fora/h = ? ? 1, this problem can be regarded as a problem of perturbation of the flow from a "flat source" by a free surface.
      
No significant differences are observed between the images in the three near-infrared bands suggesting that any CO emission is very weak, or produced by an extended flat source.
      
The spectral deviations with respect to an ideally flat source spectrum are enhanced by the horizontal dashed lines.
      


The mathematical model of two-dimensional calculation of neutron flux distribution in the hexagonal fuel assembly by using the interface current method is described in this paper, based on neutron integral transport equation. The fluxes within the meshes and at the mesh interfaces are assumed to be spatially uniform. The source neutron emission and scattering are isotropie, and the angular fluxes at the surfaces are expanded in terms of Legendre polynomials by using double P_1 approximation.The equation of interface...

The mathematical model of two-dimensional calculation of neutron flux distribution in the hexagonal fuel assembly by using the interface current method is described in this paper, based on neutron integral transport equation. The fluxes within the meshes and at the mesh interfaces are assumed to be spatially uniform. The source neutron emission and scattering are isotropie, and the angular fluxes at the surfaces are expanded in terms of Legendre polynomials by using double P_1 approximation.The equation of interface current and the formula of matrix element of leakage and transmission probabilities are derived. Based on this mathematical model, a code TPHEX is encoded. It can be used to the calculation of hexagonal fuel assemblies of the light water reactor.

讨论了用界面流方法计算二维六角形组件中子通量分布。从积分输运方程出发,导出了一种简便的数学模型,在子区内采用平源通量近似,并假设中子发射和散射为各向同性。在子区表面上,中子通量的空间分布为常数,中子角通量分布通过伴随勒让特多项式展开表示,采用DP_1近似。推导出界面流方程组,给出了泄漏、穿透几率矩阵及其矩阵元素的表达式及计算方法。根据提出的数学模型,编制了TPHEX程序,对二维六角形组件进行了计算,本程序可用于水堆六角形燃料组件计算。

Based on the study of 7 outcrops and 66 well logs, the authors summarize 10 types of logging -sedimentary facies recognizable in the Cretaceous of Songliao Basin . They are : 1) alluvial fan facies; 2) fluvial plain facies; 3) fandelta facies ; 4 ) delta facies ; 5) shoreshallow lacustrine facies ; 6) beach salty flat facies; 7) half deep to deep lacustrine facies; 8) underwater gravity flow deposit facies; 9) lacustrine bog bacies; and 10) pyroclastic facies.According to the study, the authors believe that...

Based on the study of 7 outcrops and 66 well logs, the authors summarize 10 types of logging -sedimentary facies recognizable in the Cretaceous of Songliao Basin . They are : 1) alluvial fan facies; 2) fluvial plain facies; 3) fandelta facies ; 4 ) delta facies ; 5) shoreshallow lacustrine facies ; 6) beach salty flat facies; 7) half deep to deep lacustrine facies; 8) underwater gravity flow deposit facies; 9) lacustrine bog bacies; and 10) pyroclastic facies.According to the study, the authors believe that in the application of logging -sedimentary facies , the following two factors should be always remembered :1) Logging results can reflect the underground geological information indirectly only , so that the interpretations of well logging must be based on the complete research of sedimentary geology .2) The shape of a well log is the final result affected by many factors , so that the question of apply ability in the interested area must be considered before using a published model of logging-sedimentary facies.

本文通过常规地质手段与测井解释相比较的研究方法。根据7个实测剖面和66口探井的沉积相研究成果,总结出松辽盆地内可被明显识别10种测井—沉积相类型:①大段齿化箱—菱形冲积扇相、⑦多阶梯状冲泛平源相、③中高幅齿化漏斗—钟形扇三角洲相、④连续进积或退积武三角洲相、⑤低幅背景或见中高幅指状峰的滨浅湖相、⑥低幅背景间夹中幅齿状峰的湖岸盐坪相、⑦大段低幅曲线偶见中幅齿—菱形峰的半深湖及深湖相、⑧中幅齿化箱—菱形水下沉积物重力流相、⑨低幅齿形沼泽相、⑩高幅似箱形火山(沉积)岩相。

According to the study of marine deposit, shell embaekment, palaeontology and archaeologv, the change of Hebei platland ancient coaitline were discussed.

根据海相沉积、贝壳堤、古生物和考古的发现,探讨河北平源古海岸线的变化。

 
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