修正GOMPERTZ峰型开发模型   总被引：3，自引：0，他引：3  

冯文光  龚久和 《矿物岩石》2003,23(3):97-100

修正Gompertz峰型开发模型，包括开发速度、采出程度等油气开发指标。利用修正Gompertz峰型开发模型进行开发早期决策。修正Gompertz峰型开发模型亦可用于中晚期的匹配拟合的三种典型图版，即logVD-logRP典型图版，logVD-log(at)典型图版和10gRP-log(at)典型图版。  相似文献   

ON THE CAMBRIAN AND THE ORDOVICIAN FORMATIONS OF HSISHAN OR WESTERN HILLS OF PEKING     

黄汲清 《地质学报》1927,6(2):69-81

Cambro-Ordovician rocks occur widely in Hsishan. In the westernenvirons of Peking some of the best exposures of these rocks can be observedin the Northern limb of the Chiulungshan (九山龙) syncline, which extends  相似文献   

THE RESULT OF A GEOLOGICAL SURVEY OF THF HONGSHAN INTRUSION, NORTH HONAN     

舒文博 《地质学报》1924,3(2)

The results so far obtained may be summarized as follows.The Hongshan intrusion is a dome-shaped and isolated body and deep-seated n origin.The iatrusion took place in the post-Carboniferous time The iron deposit was probably formed through metasomatie replacement of the Ordovieian limestone and therefore only extends downward for an insignifieunt depth.As a rogoureo for modern industry,it is absohtely valuess.The variation in the composition of the diorite is probably don not so much to magmatic differentiation but rather to the assimilation fo the overlying rocks.  相似文献   

Experimental Study of Perforated Caisson Breakwater     

Wang Jianyi Senior Engineer  River  Harbour Department  Nanjing Hydraulic Research Institute  Nanjing 《中国海洋工程》1992,(1)

This paper describes the design of a perforated caisson breakwater and presents the results of model test. Tests with regular and irregular waves have demonstrated that the perforated caisson breakwater has the advantages of low reflection coefficient, good wave-absorbing performance, relatively small wave height in front of the breakwater, and small amount of overtopping. Analyses have been made of the coefficient of reflection, wave height in front of the breakwater, and wave overtopping. Relevant figures and tables are presented for reference.  相似文献   

High Performance Concrete and Its Typical Mixes     

Cai Yuebo  Kwan Kwokhung  Cheung Yaukai Chan Honchuen Senior Engineer  Material  Structure Department  Nanjing Hydraulic Research Institute  Nanjing P. H. Doctor 《中国海洋工程》1995,(3)

- With the modern development of chemical and mineral admixtures, it is now possible to produce much higher performance concrete than before. Higher performance does not only mean higher strength, but also better durability, lower risk of thermal cracking and higher dimensional stability etc. The three most effective admixtures for producing high performance concrete are superplastieizer, pulverized fuel ash and condensed silica fume. This paper outlines the properties of these materials and presents some practical guidelines for their usage.  相似文献   

Two-Dimensional Mathematical Model of Tidal Current and Sediment for Oujiang Estuary and Wenzhou Bay   总被引：3，自引：0，他引：3  

陆永军  李浩麟  董壮  陆建宇  郝嘉凌 《中国海洋工程》2002,(1)

A 2-D mathematical model of tidal current and sediment has been developed for the Oujiang Estuary and the Wenzhou Bay. This model accomodates complicated features including multiple islands, existence of turbidity, and significant differ-ence in size distribution of bed material. The governing equations for non-uniform suspended load and bed load transport are presented in a boundary-fitted orthogonal curvilinear coordinate system. The numerical solution procedures along with their initial conditions, boundary conditions, and movable boundary technique are presented. Strategies for computation of the critical condition of deposition or erosion, sediment transport capacity, non-uniform bed load discharge, etc. are suggested. The model verification computation shows that, the tidal levels computed from the model are in good agreement with the field data at the 18 tidal gauge stations. The computed velocities and flow directions also agree well with the values measured along the totally 52 synchronously ob  相似文献   

A Study on Some Causes of Rubble Mound Breakwater Failure     

Zhang Fugui Ge Zhijin Senior Engineer  River  Harbour Department  Nanjing Hydraulic Research Institute  Nanjing 《中国海洋工程》1996,(4)

- Rubble mound breakwater, one of the protection structures, has been widely used in coastal and port engineering. Block stones were first used as its armor layer, and its use was limited to shallow sea areas where there is no large waves. Since the specially-shaped armor unit was developed, the rubble mound breakwater has become the main sort of the protection structures, which can be used in deep water zones where storm sometimes occurs. Owing to severe and complex surrounding conditions, the rubble mound breakwater failure sometimes occurs, thus the study on the causes of failure is of great importance. In the present study some breakwater failures at home and abroad are illustrated and the causes of failure are investigated from the point of view of design, test, construction and maintenance.  相似文献   

Experimental Study on Local Scour Around A Large Circular Cylinder Under Irregular Waves     

周益人  陈国平 《中国海洋工程》2004,18(2):245-256

1 .IntroductionWiththedevelopmentofexploitationofmarineresources ,theconstructionofoffshorestructuresdevelopsrapidly ,suchasmarineoilplatforms ,deep waterbreakwaters ,marinebridges ,largehar bors,etc .Thesestructureswillchangesurroundingwaveandcurrentconditionsandleadtolocalscourofseabed ,resultinginstructuraldamage .Therefore ,localscouraroundmarinestructuresaswellastheirprotectionhasdrawnmuchattentionfromrelativeengineeringfields .Manyscholarshaveconduct edtheoreticalanalysisandexperimentals…  相似文献   

Study on Deposition in Semi-Closed Coastal or Estuarine Harbour Basins   总被引：1，自引：0，他引：1  

Xu Xiao Senior Engineer  River  Harbour Engineering Department  Nanjing Hydraulic Research Institute  Nanjing 《中国海洋工程》1995,(1)

A preliminary study on the distribution of sediment transport and siltation within a semi-closed harbour as well as the factors affecting the siltation has been made with a suspended sediment model, in which the Lianyungang port is used as the prototype. Based on the work, this paper describes a tubid water experiment within a typical excavated harbour basin. According to the experimental results some expressions for predicting the average siltation amount for semi-closed harbour basins by means of dimensional analysis have been proposed, with tidal features, harbour geometry and properties of sediment taken into account. Through comparing the calculated results with the laboratory and field measured data, it has been shown that the expressions presented in this paper are reasonable.  相似文献   

A Normalized Stress-Strain Model for Soft Clays     

Wang Nianxiang Wei Rulong Engineer  Geotechnical Engineering Department  Nanjing Hydraulic Research Institute  Nanjing Prof. Senior Engineer  Geotechnical Engineering Department  Nanjing Hydraulic Research Institute  Nanjing 《中国海洋工程》1994,(2)

-A nonlinear model for the stress-strain behaviour of normally consolidated clays is presented based on the experimental results. It is indicated that the volume strain under pure shear is a power function of stress ratio and the normalized stress-strain curve is a standard hyperbola. According to the model, the coefficient of pore pressure induced by shear stress and the critical stress ratio which governs the influence of the negative dilatancy are suggested. It is shown by some triaxial tests that the proposed model can be used to study the negative dilatancy and to describe the stress-strain-pore pressure adequately for soft clays.  相似文献