THE SIMULATION OF THE SAR IMAGE OF INTERNAL SOLITARY WAVES IN ALBORAN SEA

1 .　ＩＮＴＲＯＤＵＣＴＩＯＮＯｃｅａｎｉｎｔｅｒｎａｌｗａｖｅｉｓａｋｉｎｄｏｆｇｒａｖｉｔｙｗａｖｅｇｅｎｅｒａｔｅｄｉｎｔｈｅｓｔｒａｔｉｆｉｅｄｏｃｅａｎ .Ｉｔｐｒｏｄｕｃｅｂｙｔｈｅｉｎｔｅｒａｃｔｉｏｎｏｆｔｉｄｅｃｕｒｒｅｎｔａｎｄｔｏｐｏｇｒａｐｈｙ ,ｓｅａｑｕａｋｅａｎｄｍｏｖｉｎｇｓｈｉｐｗｈｅｎｔｈｅｓｔｒｏｎｇ ,ｓｈａｌｌｏｗｐｙｃｎｏｃｌｉｎｅｉｓ ｐｒｅｓｅｎｔ.Ｔｈｅｉｎｔｅｒｎａｌｗａｖｅｓｉｎｔｈｅｃｏｎｔｉｎｅｎｔａｌｓｈｅｌｆａｒｅａｌｍｏｓｔｔｉｄｅｐｒｏｄ…     

AN EXTENDED MODELING OF TIDE-WAVE MOTION

1 .　ＩＮＴＲＯＤＵＣＴＩＯＮＴｏｓｔｕｄｙｔｈｅｍｏｔｉｏｎｏｆｔｈｅｔｉｄｅ ｗａｖｅｓ,ｔｈｅｓｈａｌｌｏｗｗａｔｅｒｅｑｕａｔｉｏｎｓ ,ｉ.ｅ .ｔｈｅｖｅｒｔｉｃａｌｉｎｔｅｒｇｒａ ｔｉｏｎｏｆｔｈｅｃｏｎｔｉｎｕｉｔｙｅｑｕａｔｉｏｎａｎｄｍｏｍｅｎｔｕｍｅｑｕａ ｔｉｏｎ ,ｉｓｃｏｎｓｉｄｅｒｅｄａｓｔｈｅｇｏｖｅｒｎｉｎｇｅｑｕａｔｉｏｎｓ.Ｂｙａｂｏｖｅｅｑｕａｔｉｏｎｓｔｗｏｅｑｕａｔｉｏｎｓｒｅｌａｔｅｄｔｏｔｈｅｈｏｒｉｚｏｎ ｔａｌｆｌｕｘｏｆｔｈｅｔｉｄｅ ｃｕｒｒｅｎｔｓａ…     

GENERATION OF NONLINEAR INTERNAL WAVES ON CONTINENTAL SHELF

1 .　ＩＮＴＲＯＤＵＣＴＩＯＮＩｎｔｅｒｎａｌｔｉｄａｌｉｎｔｅｒａｃｔｉｏｎｗｉｔｈｂｏｔｔｏｍｆｅａｔｕｒｅｓａｐｐｅａｒｓｔｏｂｅｔｈｅｄｏｍｉｎａｎｔｍｅｃｈａｎｉｓｍｆｏｒｇｅｎｅｒａ ｔｉｏｎｏｆｔｈｅｃｏｈｅｒｅｎｔｏｃｅａｎｉｃｉｎｔｅｒｎａｌｗａｖｅｓｔｈａｔａｒｅｏｂｓｅｒｖａｂｌｅｗｉｔｈＳＡＲ ,ｃｌｏｓｅｒｔｏｓｈｏｒｅ ,ｒｉｖｅｒｉｎｅｏｒｇｌａｃｉａｌｉｎｔｒｕｓｉｏｎａｎｄｃｏｎｔｉｎｅｎｔａｌｂｒｅａｋｐｒｏｖｉｄｅｓｅｃ ｏｎｄａｒｙｇｅｎｅｒａｔｉｎｇｍｅｃｈａ…     

高层建筑二维流场的数值模拟

针对建筑物风场的高雷诺数特点,采用离散涡法,分析了高层建筑物的非定常分离流问题.通过引入奇异点技术摆脱了保角变换的处理过程,使离散涡法能适应于复杂形状的钝体结构.数值模拟了流场的变化特征,分析了各种攻角下,具有方形截面的高层建筑的升力系数、抗力系数和Strouhal数.计算分析表明,离散涡法具有计算速度快及精度高的特点,可以刻画出流场的流动特征,透视到流动机理,在结构风工程领域具有较好的应用价值.     

全自动数控型电阻焊机的研究

介绍一种以数字集成芯片为控制元件，对焊接的电流、电极间的压力及焊接过程中的加压、焊接、维持、停顿等时间分配实现自动调节，并采用大功率晶体管（ＧＴＲ）电阻焊逆变电源，研制成全自动数控型电阻点焊机。结果表明，该机具有结构简单、性能可靠，自动化程度高，通用性强，焊接电流大等特点。可广泛应用于不锈钢、铜、铁、锌、镍、铬以及特殊金属等的焊接。并实现批量生产。     

Computational uncertainty principle in nonlinear ordinary differential equations——Ⅱ.Theoretical analysis

The error propagation for general numerical method in ordinary differential equations ODEs is studied. Three kinds of convergence, theoretical, numerical and actual convergences, are presented. The various components of round-off error occurring in floating-point computation are fully detailed. By introducing a new kind of recurrent inequality, the classical error bounds for linear multi-step methods are essentially improved, and joining probabilistic theory the "normal" growth of accumulated round-off error is derived. Moreover, a unified estimate for the total error of general method is given. On the basis of these results, we rationally interpret the various phenomena found in the numerical experiments in part I of this paper and derive two universal relations which are independent of types of ODEs, initial values and numerical schemes and are consistent with the numerical results. Furthermore , we give the explicitly mathematical expression of the computational uncertainty principle and expound the i     

工业流化床乙烯气相共聚合过程的研究 Ⅰ.产品分子量的稳态模拟

通过对Ｕｎｉｐｏｌ聚乙烯生产过程中影响聚合物分子量诸因素的分析，建立了包含乙烯分压和催化剂加料速率两个新变量的、用于表征聚合物分子量（ＭＩ）的稳态模型：ｌｎＭＩ＝Ａ０＋Ａ１／Ｔ＋Ａ２ｌｎ（Ａ３＋∑ｉｊＡｉｘｊ）利用工业装置上的操作数据对模型中诸参数进行估值。将该模型用于实际产品ＭＩ值的预测，计算值与分析结果的平均相对误差为４．６７％。表明该模型可以很好地模拟工业生产过程。     

裂缝性油田合理开发井网的数值模拟研究

采用黑油模型，对于存在微裂缝的低渗透油田进行合理井网形式的数值模拟研究，探讨了方向渗透率比值与合理的井排距比值之间的定量关系，对不同的方向渗透率比值，给出了最优的井网形式，在优选井网的基础上，考虑了整体压裂措施中最佳裂缝半长的选取。     

THE RE-DERIVATION OF THE VORTICITY EQUATION OF THE LAYERED FLOW OF THE SHALLOW SEA

1 .　ＩＮＴＲＯＤＵＣＴＩＯＮＦｏｒｔｈｅｌａｒｇｅ ｓｃａｌｅｏｃｅａｎｉｃｆｌｏｗ ,ｐｅｏｐｌｅｕｓｕａｌｌｙｓｅｅｋｔｈｅｓｏｌｕｔｉｏｎｓｆｒｏｍｔｈｅｑｕａｓｉ ｇｅｏｓｔｒｏｐｈｉｃｖｏｒｔｉｃｉ ｔｙｅｑｕａｔｉｏｎｄｅｒｉｖｅｄｆｒｏｍｔｈｅｐｅｒｔｕｒｂａｔｉｏｎｂｙｕｓｉｎｇＲｏｓｓｂｙｎｕｍｂｅｒεａｓａｌｉｔｔｌｅｐａｒａｍｅｔｅｒ.Ａｎｉｍｐｏｒｔａｎｔａｐｐｒｏｘｉｍａｔｉｏｎｗｈｅｎｄｅｄｕｃｔｉｎｇｖｏｒｔｉｃｉｔｙｅｑｕａｔｉｏｎｉｎｔｈｅｌａｙｅｒｅｄｓｅａｗａｔ…     

NUMERICAL MODELLING OF THE QUASI-GLOBAL OCEAN CIRCULATION BASED ON POM

A free surface quasi-global ocean circulation model, Princeton Ocean Model (POM), was adopted to simulate the climatological circulation. The horizontal resolution of the model was 1/2~X 1/2~ with 16 vertical sigma layers. The initial temperature and salinity fields of the model were interpolated from the Levitus data, and the COADS(Comprehensive Ocean-Atmosphere Data Set ) monthly mean SST and wind fields were used as the surface forcing. The integral time length is 6a. The main general circulation components such as the equatorial current, the equatorial undercurrent, the south and north equatorial currents, the Antarctic Circumpolar Current (ACC), the Kuroshio and the Gulf Stream were well reconstructed. The volume transports of PN section and ACC agree well with the estimations on field survey. Up to now there is no global or quasi-global circulation model results using POM in literature. Our results demonstrate that POM has sound ability to simulate the coastal circulation as well as the general ocean circulation. And this result can provide open boundary conditions for fine resolution regional ocean circulation models.