北京地区天符、太乙天符年份气象特征及与传染病流行的关联性研究

目的以1970—2004年天符、太乙天符年份为研究对象,探讨其运气特点与北京地区实际气候变化的吻合性以及对部分传染病流行情况的影响。方法收集北京地区1970—2004年35年的气象资料及部分传染病数据资料,并提取其中的天符、太乙天符年(即1975年、1976年、1977年、1978年、1979年、1998年)共6年的相应数据资料,从气象变化和传染病流行两方面分别与天符、太乙天符年的运气特点进行吻合性分析,计算出符合率。结果天符、太乙天符6年的干支运气特点与实际气象比较,基本符合率达83%;统计11种传染病各病六气高发时段的发病数发现,天符、太乙天符年的发病数高于35年同期发病数均值的传染病有7种,符合率为64%;选取35年间任意6年平气年与天符、太乙天符6年对比发现,11种传染病中有6种传染病的特殊年发病率高于平气年发病率,且比较差异有统计学意义(P<0.05),符合率为55%;统计死亡数据完整的9种传染病在35年间的死亡率高发年份发现,天符、太乙天符年约占其中的40%;用选取的6年平气年作对比发现,9种传染病中有7种传染病的特殊年死亡率高于平气年死亡率,且比较差异有统计学意义(P<0.05),符合率为78%。结论北京地区的实际气象变化及部分传染病流行情况基本符合运气同化年份中天符、太乙天符年的运气特点推测,应对这些特殊年份加以重视,为传染病的预防及时有据地采取措施。

The development status and the prospect of the pipeline robots in the oil and gas storage and transportation industry

In the process of the constant development of the oil and gas storage and transportation technology, the maintenance of the large pipelines is an important task. At present, China vigorously promotes the use of the pipeline robots, for the maintenance of the oil and gas pipelines by the unique characteristics of the robots. In this paper, the author carries out the detailed analysis on the current situation of the development of the pipeline robots in the oil and gas storage and transportation industry, and compares the different applications of the pipeline robots at home and abroad. Starting from the principles of the operation of the robots, the author analyzes the characteristics of the different types of the robots, and combined with the existing conditions of the oil and gas storage and transportation in our country, the author tries to find the most favorable way of the working of the pipeline robots, to continuously improve the development of the oil and gas storage and transportation industry using the robot technologies.

First ERW Ф610 Steel Tube Production Line Brought on Stream

The first domestic ERWФ610 high-frequency straight-seam steel pipe production line was built in Shanghai Zhongyou TIPO Steel Pipe Co Ltd recently. This steel pipe production line initiated inside China has drawn the attention from many enterprises including PetroChina and CNOOC. It is known that the first batch of products have been transported to the construction site of the West-East Gas Transmission Project.

Review of Gas Transportation and Storage Facilities Construction in 2015

By the end of 2015, total length of China＇s long-distance gas pipelines has exceeded 70,O00km. Onshore stratey, ic import paths have been formed, domestic trunk networks perfected and gas storages construction pace acceh＇rated. The Chinese section of Russia-China East Gas Pipeline was officially commenced, which marked that the northeast import path entered the stage ofconstruction. There are 13 LNG terminals in China. The National Development and Rerorm Commission （NDRC） approved China＇s.first private-owned LNG terminal- the Zhoushan LNG terminal. In the coming.five years, the focus of institutional reform will be the independence of pipelines and networks, the focus of construction will be regional networks and branch pipelines, and joint ventures will be the mainstream for gas pipeline construction and operation.

3D numerical simulation of boreholes for gas drainage based on the pore–fracture dual media

A gas migration controlling equation was formulated based on the characteristics of the dual pore–fracture media of coal mass and in consideration of the matrix exchange between pores and fractures.A model of permeability dynamic evolution was established by analyzing the variation in effective stress during gas drainage and the action mechanism of the effect of coal matrix desorption on porosity and fracture in the coal body.A coupling model can then be obtained to characterize gas compressibility and coal deformability under the gas–solid coupling of loading coal.In addition,a 3D model of boreholes was established and solved for gas drainage based on the relevant physical parameters of real mines.The comparison and analysis results for the law of gas migration and the evolution of coal body permeability around the boreholes before and after gas extraction between the dual media and the single-seepage field models can provide a theoretical basis for further research on the action mechanism of gas drainage.

The challenges facing the oil and gas storage and transportation technology and its developing direction

In recent years, our country is increasingly dependent on the use of the oil resources, and the degree of the oil mining is also continuously upgrading. After the completion of the tasks related to the oil mining in the lands, the technologies for the development of the offshore oil mining are particularly important. Among these problems, after the exploitation, the storage and transportation of the offshore oil and gas is worthy of the discussion of the technical personnel. From the experience of the oil and gas storage and transportation in the long years, in some environmentally degraded areas, there are problems in the efficiency and safety in the long pipeline transportation and the oil and gas mixed transportation, and in the transportation, there are also big shortcomings. In this paper, the author carries on the analysis of the existing questions encountering in our country＇s oil and gas storage and transportation~ and proposes the direction of the researches in the future oil and gas storage and transportation, and the purpose is to better improve the security of Cbina＇s oil and gas storage and transportation and to enhance the efficiency of the use of the oil and gas.

Experimental and numerical investigation of the roll motion behavior of a floating liquefied natural gas system

The present paper does an experimental and numerical investigation of the hydrodynamic interaction and the response of a single point turret-moored Floating Liquefied Natural Gas(FLNG) system,which is a new type of floating LNG(Liquid Natural Gas) platform that consists of a ship-type FPSO hull equipped with LNG storage tanks and liquefaction plants.In particular,this study focuses on the investigation of the roll response of FLNG hull in free-decay motions,white noise waves and also in irregular waves.Model tests of the FLNG system in 60%H filling condition excited by both white noise waves and irregular waves combined with steady wind and current have been carried out.Response Amplitude Operators(RAOs) and time histories of the responses are obtained for sway,roll and yaw motions.Obvious Low Frequency(LF) components of the roll motions are observed,which may be out of expectation.To facilitate the physical understanding of this phenomenon,we filter the roll motions at the period of 30 s into two parts:the Wave Frequency(WF) motions and the Low Frequency(LF) motions respectively.The results indicate that the LF motions are closely related to the sway and yaw motions.Possible reasons for the presence of the LF motions of roll have been discussed in detail,through the comparison with the sway and yaw motions.As for the numerical part,the simulation of the modeled case is conducted with the help of the software SESAM.A good agreement between experiments and calculations is reported within the scope of trends.However,the numerical simulations should be further improved for the prediction of the FLNG system in the heading sea.