Search results

Distribution Characteristics of the Remaining Oil of Putaohua Oil Layer in Pubei Oil Field of Songliao Basin Zongbao Liu1, a, Xun Gong2,b 1 College of Earth Science, Northeast Petroleum University, Daqing, Heilongjiang, 163318, China 2 College of Earth Science, Northeast Petroleum University, Daqing, Heilongjiang, 163318, China alzbdqpi@163.com, bgongxunmeng@163.com Keywords: remaining oil; distribution characteristics; remaining oil potential tapping; Putaohua oil layer; Songliao basin Abstract.
Top of micro-structures remaining oil refers to the oil formed at the micro structural bulge during high water cut stage where inject material can`t affect, the area is usually small.
Journal of jilin university, 2008, 38: 128-132.

Ball Valve Seat Design Method Based on Finite Element Analysis and Calculation Yan PENG1, a, Liang-yu ZONG2, b, *,Liu-feng HAO 3, c,Qi-yang LI 4, d 1,2,3,4Sichuan University of Science & Engineering, College of Mechanical Engineering; Zigong, China apengyan@suse.edu.cn,b549691119@qq.com,c1406851363@qq.com,d495479389@qq.com *Corresponding author Keywords: finite element, valve seat, sealing face, sealing load, Design angle.
Fixed Ball Valve Seat Design Analysis The ball valve seat using material generally for polytetrafluoroethylene,when design the seat, Samples of ball valve seat design is shown in Fig.1, Fig. 1.
Chinese Journal of Mechanical Engineering, 2002, 38(8):27-30.In Chinese [2] JB/T 5296-1991.
Computational fluid dynamics and its application of the principle and application of the CFD software [M].Wuhan: Huazhong University of science and technology press.

Isolation and Identification of A Cellulolytic Bacterium from the Huguang Maar Lake Lihong Cui1,a , Jihua Li1,b*, Xiaoyi Wei1,c, Donghui Han1,d, Yuliang Zhang2,e 1 Key Laboratory of Tropical Crop Products Processing of Ministry of Agriculture, Agriculture Products Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524001, China 2 Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China aciana_312@yahoo.com.cn, bfoodpaper@126.com, cweixywei@163.com, dhzauhandonghui@163.com, eyuliang1017@126.com Keywords: Cellulose hydrolysis, Cellulase, Bacteria, Screen, 16s rDNA Abstract.
It can be hydrolyzed to glucose and other soluble sugars which can be further converted to ethanol and other biofuels by fermentation, thereby it is an attractive raw material for producing bioenergy.
Koo: World Journal of Microbiology and Biotechnology.

Introduction With the development of economy and the progress of science and technology, Chinese industry develops more and more rabidly.
The first layer, around separated by insulating material, is hardware layer, where a sensor node and a wireless routing node are placed.
Acknowledgements This work was supported by a grant from the National Natural Science Foundation of China (No. 51275149) References [1] Yunze MA.
[J]: IEEE Sensors Journal, 2011(5):1145–1151

Surface Passivation of Silicon Wafers by Iodine-Ethanol (I-E) for Minority Carrier Lifetime Measurements Jingwei Chen a, Lei Zhao b, Hongwei Diao, Baojun Yan, Su Zhou, Yehua Tang and Wenjing Wang c Key Laboratory of Solar Thermal Energy and Photovoltaic System of Chinese Academy of Sciences, Institute of Electrical Engineering, the Chinese Academy of Sciences, Beijing 100190, China achenjingwei@126.com, bzhaolei@mail.iee.ac.cn, cwangwj@mail.iee.ac.cn Keywords: The effective minority carrier lifetime；the bulk lifetime of minority carriers；μPCD; iodine-ethanol passivation Abstract.
Introduction The bulk lifetime of minority carriers (τb) in Si is one of the most important material parameters in the design and fabrication of Si-based solar cells.
Kimerling: Journal of the Electrochemical Society Vol.142 (1995), p.2833 [6] B.

., Fatigue and Fracture in Engineering Materials and Structures, Vol. 277 (2004) pp. 623-636
This technique has been used to investigate various crack tip parameters [[] Diaz, F.A., Patterson, E.A., Tomlinson, R.A., and Yates, J.R., Fatigue and Fracture in Engineering Materials and Structures, Vol. 27, (2004) pp. 571 – 583. ,[] Zanganeh, M., Tomlinson, R.A., and Yates J.R., T-stress determination using thermoelastic stress analysis, Journal of Strain Analysis for Engineering Design, Vol.43, (2008), pp 529-537. ] but recently it has been proposed that an understanding of the crack tip plasticity may be obtained from the TSA phase data [[] Patki, A.S., Patterson, EA., Fatigue and Fracture of Engineering Materials and Structures, Vol. 33, (2010), pp. 809-821. ].
Areas with a maximum principal strain greater than the material yield value were assumed to have yielded and hence be inside the plastic zone.
Previous work using the optical method of caustics has shown that under zero load a residual caustic is observed at the tip of the fatigue crack indicating the presence of a residual strain field, due to crack tip plasticity [[]Tomlinson, R.A., Patterson, E.A., Fatigue and Fracture in Engineering Materials and Structures, Vol. 20, (10), (1997), pp. 1467-1479. ].
Acknowledgements These experiments were conducted at Michigan State University and Tomlinson’s visit was funded by an Overseas Travel Grant from the Engineering and Physical Science Research Council.

Intrinsic factors 1) Material properties.
From tribology aspect, under the same working conditions, materials with excellent antifriction and abrasion resistance properties can reduce the failure frequency greatly.
Wear and fatigue failures are two main failure types for most materials. 2) Surface properties.
Chinese Journal of Aeronautics.
Tribology: the science of keeping bearings running.

Introduction GaN and related materials (III-Ns) continue to mature despite the lack of a native substrate to permit homoepitaxial growth of device layers.
More advanced device technologies based on III-N materials such as lasers, UV detectors and emitters, high power rf devices for higher frequency applications, and power switching devices are poised for success due to advances in heteroepitaxial approaches and the expanded use of SiC substrates, a result of their increased availability and improved quality.
If this is the case, then reducing the number of nucleation sites appears to be one approach for making larger-grained material.
Recent work suggests that through elimination of surface steps and screw dislocations in the SiC (which act as a source of surface steps), III-N films can be deposited with quality equal to or better than that of free-standing GaN substrate materials.
Sun , et al.: Journal of Applied Physics Vol. 95 (3) (2004), p. 1450. 23.

They all display a homogeneous jagged step front which is the sign of single domain 3C-SiC material [16].
In the framework of a European program called MANSiC and starting next year, these thin and thick 3C materials will be characterized and processed for devices fabrication.
Jacquier: New Journal of Chemistry Vol.28(8) (2004), p.889 [6] M.
Monteil: Diamond and Related Materials (2006), in press [7] M.
Monteil: Materials Science Forum Vol. 483-485 (2005), p.421 [15] M.

There is a method for calculating them in the elastoplastic stage of materials operation, which makes it possible to assess the behavior of a construction under operational loads up to destruction.
The physical and mechanical characteristics of the materials of the models were determined by testing special samples.
Razzakov, Composite reinforced concrete shells of building coatings under conditions of long-term operation and seismic effects. – Tashkent, Publishing house of the Academy of Sciences of the Republic of Uzbekistan.
Series: Journal of Physics: Conf: Series: 1425 (2020) 012101, doi: 10.1088 / 1742-6596 / 1425/1/012101
Razzakov, Long-term operation of a round membrane at large deflections, Uzbek Journal Problems of Mechanics, 2002, no. 2, pp. 34-37