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   Science & Technology Review
2012, Vol.30, No. 2
18 January 2012

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卷首语

Science & Technology Review. 2012, 30 (2): 3-3. ;  doi:
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科技风云

Science & Technology Review. 2012, 30 (2): 7-7. ;  doi:
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Abstract ( 184 )
封面图片说明

Science & Technology Review. 2012, 30 (2): 8-8. ;  doi:
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特别栏目

Science & Technology Review. 2012, 30 (2): 8-8. ;  doi:
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Science & Technology Review. 2012, 30 (2): 10-10. ;  doi:
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Science & Technology Review. 2012, 30 (2): 12-12. ;  doi:
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Science & Technology Review. 2012, 30 (2): 13-13. ;  doi:
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Science & Technology Review. 2012, 30 (2): 14-14. ;  doi:
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Science & Technology Review. 2012, 30 (2): 73-73. ;  doi:
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Science & Technology Review. 2012, 30 (2): 88-88. ;  doi:
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Science & Technology Review. 2012, 30 (2): 95-95. ;  doi:
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Science & Technology Review. 2012, 30 (2): 96-96. ;  doi:
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科技事件

Science & Technology Review. 2012, 30 (2): 9-9. ;  doi:
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科技工作大家谈

Science & Technology Review. 2012, 30 (2): 11-11. ;  doi:
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Exclusive

Science & Technology Review. 2012, 30 (2): 15-17. ;  doi:
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Abstract ( 186 )
Articles

Analysis of Pressure Response Rate of Pintle Motor

WANG Jiaxing;WEI Zhijun;WANG Ningfei
Science & Technology Review. 2012, 30 (2): 18-21. ;  doi: 10.3981/j.issn.1000-7857.2012.02.001
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Abstract ( 244 )
In order to analyze the pressure response rate during the pintle shift movement of the pintle motor, a 2D model is build for simulations with CFD software. Influencing factors on the the pressure response characteristics are identified, such as the drag force of the drive system and the friction coefficient of the dynamic seal. It is found that the drag force of the drive system, the pressure exponent, and the semi-cone angle of the pintle head would greatly affect the pressure response rate; the decrease of the friction coefficient under a high pressure could obviously reduce the friction force and thus increase the pressure response rate; the combustion temperature of the propellant only slightly influences the pressure response rate.

Fluid Nature Identification of an Oil-gas Field in Sultan Using Stylebook Hierarchical Decomposition Cross-plot and Decision Tree Methods

WANG Lichang;WANG Zhizhang;TAO Guo
Science & Technology Review. 2012, 30 (2): 22-27. ;  doi: 10.3981/j.issn.1000-7857.2012.02.002
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Abstract ( 298 )
Identifying the natural properties of the fluid is one of the significant tasks involving reservoir evaluation, and the consequential results would directly affect the understanding and development of oil-gas filed. By taking the advantage of a variety of logging curves as parameters, the stylebook hierarchical decomposition cross-plot and decision tree methods are utilized to identify the fluid natural properties in a Sudanese oil-gas field. Finally a classification modeling is obtained. The results indicate that (1) The accuracy of a single cross-plot could be reached as high as 80%; however, there is still an abundant room for the improvement if the stylebook hierarchical decomposition cross-plot is used in spite of shortcomings. (2) The parameters could be automatically selected in decision tree by calculating the weight of the parameters, thus the accuracy could be further reached at 86.7%. Combination implementation of the cross-plot and decision tree is able to improve the accuracy up to 100%, and the shortcomings are able to be made up. (3) According to the conventional understanding, an uniform oil-gas interface is expected to occur in the Sudanese filed, however with the applications of the decision tree, the filed now is regarded as a layered reservoir, the oil-field has achieved better results by adjusting the development strategy which is depended on the results of the decision tree.

Fracture Optimization of Horizontal Wells in Luo1 Well Area

LIU Weidong;LI Yuhong;ZHANG Yaling;HAN Jinliang;YANG Lijun
Science & Technology Review. 2012, 30 (2): 28-31. ;  doi: 10.3981/j.issn.1000-7857.2012.02.003
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Abstract ( 330 )
The fracture optimization should be considered in the design for the fracturing constriction before it is put into practice to have more effective fractures. In view of the characteristics of fractured horizontal wells, in this paper, with the concept model of the non-homogeneous media and the low permeability reservoir and with the Eclipse reservoir simulation software, the fracture parameters are optimized, including the fracture azimuth, the fracture position, the fracture number and the non-uniform fracture length. The results show that the production of the horizontal oil increases with the increase of the number, the length and the conductivity of fractures; for different fractural layouts, the fractures are always in the stagger, with the distance among the outer fractures smaller than that among the inner fractures. Because of fracture's mutual interference actions, different fractures are related with different production rates, and the production related with the most inner fractures turns out to be the lowest.

An Novel Method for Detecting Color Image Edge Based on Alpha Stable Distribution

LI Li
Science & Technology Review. 2012, 30 (2): 32-35. ;  doi: 10.3981/j.issn.1000-7857.2012.02.004
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Abstract ( 238 )
Because the color is a powerful indicator of a color image, so the color edge detection is essensial for color image segmentation. The speckle noise in a color image would severely degrade the image interpretation and increase the difficulty for image processing, such as for edge detection and feature extraction. Thus, it is important to reserve the edge characters effectively based on speckle noise removing. This paper proposes a novel algorithm for removing the speckle noise and detecting the color image edge. Firstly, a denoising algorithm is proposed based on the alpha stable distribution. Secondly, the color image edges are obtained automatically by combining an improved isotropic edge detector and a fast entropy threshold technique. According to the color distance between the pixel and its eight neighbor-pixels, the color image edges can be further accurately determined. The experiments demonstrate that the proposed method can successfully be used to obtain the color image edges.

Keygen Based on CPU Serial Number and Encryption Technique

HE Dinghua
Science & Technology Review. 2012, 30 (2): 36-38. ;  doi: 10.3981/j.issn.1000-7857.2012.02.005
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Abstract ( 287 )
The keygen is a software used to generate a registration code. In this paper, the serial number of CPU is used to construct the keygen. In order to improve the security level, in this paper, the serial number of CPU is encrypted, with its characters in different locations being encrypted by different algorithms. A keygen based on CPU serial number and encryption technique is given to show the effectiveness of the method.

Screening of Quantitative Diagnosis Indices of Typing Abnormal Hilit Syndrome in Uighur Medicine Using Delphi Method with 305 Cases of Type 2 Diabetes

MAITISIDIKE Ayinuer;UPUR Hamulati;YU Shanjiang;ABUDULAIHAITI Wuerguli;AJI Rouzibake;YOU Lina;YANG Na;YAN Xinghai
Science & Technology Review. 2012, 30 (2): 39-45. ;  doi: 10.3981/j.issn.1000-7857.2012.02.006
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Abstract ( 257 )
To set up abnormal Hilit typing quantization diagnostic criteria of Uighur medicine for the type 2 diabetes patients, based on the free disease clinical diagnostic information, 305 type 2 diabetes patients were selected in the study of quantifying diagnosis specialist counseling. Selected factors were analyzed by the modified multi-categorization logistic regression analysis to determine the symptom-complex factor dedication degree and the symptom-complex factor main and subsequent symptoms of the abnormal hilit of type 2 diabetes through OR values. As a result, the meaningful symptoms were found in all the abnormal hilit syndromes according to the OR values. It is shown that the chief symptoms of the abnormal savda type diabetes are nervousness in mind, dry mouth, thin white tongue coating, dark purple tongue and, bitter taste. The subsequent symptoms are cyanotic lips, fat, short tongue, thin and pale urine. The chief symptoms of the abnormal kan type diabetes are hot skin, thick, strong pulse, lack of eye expression and reddish conjunctiva. The subsequent symptoms are dark red tongue, smooth tongue coating, reddish complexion and slightly rough skin. The chief symptoms of abnormal balgham type diabetes are pale lips, weariness in mind, sticky mouth, white and greasy tongue coating. Subsequent symptoms are pale complexion, whitish conjunctiva, lack of sleep, and deep, slow pulse. The chief symptoms of abnormal sapra type diabetes are acute mind and excessive anger, yellowish complexion, pale lips, yellowish conjunctiva, and hot skin. Subsequent symptoms are dim complexion, lack of eye expression, yellow face color and rough skin. The features of excess syndromes of the four abnormal hilit syndromes identified by the Delphi method are in line with clinical practice. The establishment of the standards would provide a ground for developing the clinical effect standards for the traditional Uighur medicine and at the same time, a methodological reference for the establishment of the related standards.
Reviews

Progresses in Crystal Growth Under Microgravity in Space

CHEN Wanchun;SONG Youting
Science & Technology Review. 2012, 30 (2): 46-57. ;  doi: 10.3981/j.issn.1000-7857.2012.02.007
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Abstract ( 219 )
The crystals with high quality and perfect property are more and more required following the progress of the information and biological technologies. Under the gravity field on earth, we have the natural convection, which greatly influences the transport process of both the heat and the solute as well as the crystal/solution boundary characteristics, and therefore, the crystal quality and property. The space microgravity environment provides an ideal condition for a pure diffusion crystal growth, to grow perfect single crystals. The space crystal growth was extensively studied with the microgravity experiments over the three decade in satellite, spaceship, space laboratory and space station. This paper summarizes the progresses related with several leading crystals, such as semiconductor, special function crystal, non-linear optical crystal, protein crystal and galley salt crystal.

Review of Inversion Structure and the Relationship Between Hydrocarbon Accumulation and Inversion Structure

ZENG Weite;DING Wenlong;JIU Kai;WU Liming;LI Chao;XU Changchun
Science & Technology Review. 2012, 30 (2): 58-64. ;  doi: 10.3981/j.issn.1000-7857.2012.02.008
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Abstract ( 260 )
Inversion structure is a kind of compressional structure formed through the extrusion of the graben or half-graben system in the extensional basin. Extensional subsidence, stable depression and extrusion inversion are three stages generally going through in the inversion structure. The faults connected with the source rocks are overlaid by various anticlines caused by the tectonic inversion, with a very interesting relationship among transportation, generation and reservation. The inversion structures were extensively studies. This paper focuses on the inversion structure styles of strike-slip B basin in African, including the concept evolution of inversion tectonics, the types of inversion tectonics, the identification of inversion tectonics, and the inversion rate. Several existing problems of the inversion structure are discussed. It is shown that, the styles of the inversion structure are mainly classified based on the influence and the control of the faults and fold structures. The tectonic inversion should be identified based not only on the analysis of the regional event, but also on the features of folds and faults and the activity history. The degree of the tectonic inversion can be described qualitatively and divided into three levels: the slight inversion, the moderate inversion and the strong inversion based on the deformation characteristics of the reverse faults and folds. The inversion rate can be calculated to quantify the degree of inversion accurately.

Applications of Phospholipid Fatty Acid (PLFA) Analysis in Environmental Microbial Study

LI Dongmei;SHI Xuehua;SUN Lixin;ZHAO Zhen;YU Min;OUYANG Hong
Science & Technology Review. 2012, 30 (2): 65-69. ;  doi: 10.3981/j.issn.1000-7857.2012.02.009
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Abstract ( 561 )
Traditional microbial identification and cluster analysis method is founded on the basis of the separation of microbial pure culture. Because more than 99% of micro-organisms can not be cultured in the natural environment, microbial analysis and research have many limitations. Compared with the traditional medium-based microbial separation technology as well as physiological methods and molecular biological methods, the Phospholipid Fatty Acid analysis which based on fatty acids as a biomarker is widely used in the research of environmental microbiology nowadays. This paper discusses the PLFA fingerprint analysis and its applications for environmental microbial studies, including identification of unknown microbes and assessment of microbial diversity.

Progress of the Synthesis of Sugar Esters in Ionic Liquids

FAN Guodong;KANG Li;LI Ganghui
Science & Technology Review. 2012, 30 (2): 70-73. ;  doi: 10.3981/j.issn.1000-7857.2012.02.010
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Abstract ( 412 )
Sugar ester is a type of nonionic biologic surfactants, with many excellent properties, such as foaming and emulsification properties and is widely used in many fields. However, some poisonous organic solvents are usually used in the traditional synthesis of sugar esters, which makes it problematic for these esters to be applied in the food industry and other related fields. Ionic liquids, which can be used to solve the problem, are not only a kind of novel, environmental friendly and innoxious solvents, but also an interesting class of tunable and designed solvents. They have been used extensively in a wide range of applications. This paper summarizes the characteristics and the types of ionic liquids, and reviews the latest research progress of ionic liquids taking the place of solvents in the emulsification method and the enzyme catalyst method. Advantages and disadvantages are discussed. Some suggestions for the development of sugar ester are made and the prospects in the future are also commented.

The Urban Model Based on Cellular Automata

LI Yali;QIN Yaochen
Science & Technology Review. 2012, 30 (2): 74-79. ;  doi: 10.3981/j.issn.1000-7857.2012.02.011
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Abstract ( 214 )
The Cellular Automata (CA) can be used to simulate and predict the urban spatial change in urban planning. This paper reviews the urban CA, its construction, and applications in land use, traffic, diseases and disaster controls, analyzes the characteristics of the applications of the urban CA, and the trend of the urban CA in the future. It is shown that CA has good application prospects in China. The number of researches in recent twelve years is increasing though with some fluctuations. With the development of the urban CA model, the applications will gradually increase in the filed of diseases and disaster. The multi-agent would make up the unmovability characteristic of the urban CA for its applications in land use and traffic control.
科技评论

Science & Technology Review. 2012, 30 (2): 80-80. ;  doi:
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主编心语

Science & Technology Review. 2012, 30 (2): 83-83. ;  doi:
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科技职场

Science & Technology Review. 2012, 30 (2): 84-84. ;  doi:
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