13 February 2015, Volume 33 Issue 3

    

Exclusive
Articles
Reviews
Focus

• Select all
  |

Exclusive
• Select
  Construction of characteristic AST science and technology service system

  JIN Taiyuan

  Science & Technology Review. 2015, 33(3): 13-18. https://doi.org/10.3981/j.issn.1000-7857.2015.03.001

  Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save

  This paper uses the system theory method, from the structure and function perspective, analyzes the current situation of association of science and technology (AST) service capability construction, study the gap, bottleneck and crux of AST service capability construction, rationally search the root of AST service "system predicament stems from the poverty of theory", creatively proposes a strategic conception of "cracking the system predicament through systematic innovation", emphasizes driving the systematic innovation by strategic thinking, promote the construction of the AST service system via system innovation, accelerate the construction of "characteristic AST service system", comprehensively improve the AST service capabilities through service system construction, and further enhance the level and quality of AST service innovation and development.
Articles
• Select
  High-efficience Domino reaction of synthesizing 5-(4-fluorophenyl)-11-(4-methoxybenoyl)-2,3,4,5-tetrahydro-1H-indolo[2,3-b]quinolin-1-one compound and characterizing its crystal structure

  LU Qiuli, ZHU Xiaotong, ZHU Jie

  Science & Technology Review. 2015, 33(3): 19-23. https://doi.org/10.3981/j.issn.1000-7857.2015.03.002

  Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save

  The title compound of 5-(4-fluorophenyl)-11-(4-methoxy benoyl)-2,3,4,5-tetrahydro-1H-indolo[2,3-b]quinolin-1-one has been synthesized by the reaction of simple and off-the-shalf 3-p-methoxyphenacylideneoxindole with 3-(4-fluorophenylamino) cyclohex-2-enone as raw material in the presence of EtONa in ethanol. The structure of title product is determined by single crystal X-ray diffraction. The crystal is monoclinic, space group Cc, with Mr=537.57 (containing a molecular DMF solvent), a=1.44352(3) nm, b=2.6027(3) nm, c=0.93423(8) nm, V=2.6917(4) nm³, Z=4, D_c=1.327 Mg/m³, μ=0.093 mm^-1, F(000)=1128. The structure is solved by direct methods and refined by full-matrix least squares method to the final R=0.0631, R_ω=0.1535. X-ray analysis reveals that the formation of the new nitrogen-bearing six-member heterocyclic ring in the crystal structure is a coplanar structure.
• Select
  Organic wastewater treatment by using superheated and near-critical water oxidation

  ZHAO Guangming, LIU Yucun, CHAI Tao, WANG Hongwei, TIAN Jiangxia

  Science & Technology Review. 2015, 33(3): 24-28. https://doi.org/10.3981/j.issn.1000-7857.2015.03.003

  Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save

  In this paper, the feasibility of waste water oxidation treatment in superheated near-critical region of water is studied through experiments. Five kinds of typical industrial organic wastewater which are difficult to biodegrade are chosen for purification experiments. They are coking wastewater, penicillin wastewater, papermaking wastewater, acrylonitrile wastewater and TNT wastewater, respectively. The temperature of the experiment is 420-530℃ and the pressure 21-26 MPa. The results show that at a constant pressure the CODcr removal ratios of the five kinds of wastewater are increasing rapidly with temperature increase,whereas at a constant temperature the CODcr removal ratios are only slightly increased as the pressure increases. Additionally, the differences of CODcr removal rates and purification rate of water in the outlet of the system at different pressures are gradually reduced as the temperature increases. Under conditions of temperature at 520-530℃ and pressure at 21 MPa, the purified CODcr values of the five typical kinds of wastewater are less than 200 mg/L, even less than 100 mg/L. Through a technological and economic analysis, it is pointed out that considering the engineering practice, the superheated and near-critical water oxidation is more suitable for industrial organic wastewater treatment, instead of the supercritical water oxidation technology.
• Select
  Sequence stratigraphy of Triassic in Hongche area, Junggar Basin

  WANG Yaning, ZHANG Shangfeng, CAI Lulu

  Science & Technology Review. 2015, 33(3): 29-36. https://doi.org/10.3981/j.issn.1000-7857.2015.03.004

  Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save

  By analyzing plentiful geological and geophysical data and based on the fundamental principles of sequence stratigraphy and sedimentology, the isochronal framework of sequence stratigraphy and sedimentary system model of Triassic in Hong-Che area of Junggar Basin have been established. The whole Triassic is divided into five third sequences (TSQ1-TSQ5), among which TSQ2 is lower Karamay formation and TSQ3 is up Karamay formation. It is found that Triassic plate is in the evolution of the foreland basin stage, and has moderate tectonic activity. It's different to identify Ffs but easy to identify Mfs in sequence, transgressive systems tract and highstand systems tract. According to the tectonic development of the background and type of depositional system of northwestern margin of Junggar Basin, and combined with the evolution characters of sedimentary facies, a developing mode of Triassic in the study area is established. Through sequence control factor, basin tectonic activity, climate and lake level fluctuation are found, which have apparent control action in sequence. At last, the paper discusses the relationship of the sequence stratigraphy and lithologic trap, and points out that in TSQ2 period, as flood plain developed, it had high shale content, thus favored buildup of lithologic hydrocarbon reservoir. In the plane, the area of Hong9 well-Hong72 well-Hong61 well is the favorable area because of the low sand ratio (25%~40%) and the good reservoir quality.
• Select
  Formation pressure and distribution of natural gas in the Upper Paleozoic, southeastern Ordos Basin

  WANG Weili, GAO Hairen

  Science & Technology Review. 2015, 33(3): 37-42. https://doi.org/10.3981/j.issn.1000-7857.2015.03.005

  Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save

  Exploration achievements in the Southeastern Ordos Basin have attracted tremendous attention in recent years. However, few researches about distribution of formation pressure and relation with natural gas have been carried out in this area. The measured formation pressure data of 293 wells and well log data of 154 wells are analyzed in this paper, and the results show that the mudstones from Upper Shihezi Formation to Taiyuan Formation of Permian are mostly undercompacted, and that the variations with depth of formation pressure in 4 target layers have obvious differentiation, which can be divided into negative pressure system of Permian and normal pressure system of Carboniferous in further. The distribution of current formation pressure is high in the east and north and low in the west and south, the relation between sedimentary facies and distribution of formation pressure in Permian are in a good consistency. Gas reservoirs on vertical zonation are controlled by the under compacted mudstone layers, and also can be found in the "low pressure" areas of negative pressure stratum in Permian and "high pressure" regions of normal pressure in Carboniferous. The discovery of the relation between formation pressure and gas reservoirs is significant for the following natural gas exploration in this area.
• Select
  Numerical simulation and experiment of the effect of distributor's hole diameter on fluidization characteristics

  WANG Xiao, SI Hui, GUO Xiaohui, ZHAO Dong

  Science & Technology Review. 2015, 33(3): 43-48. https://doi.org/10.3981/j.issn.1000-7857.2015.03.006

  Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save

  An Eulerian-Eulerian model incorporating the kinetic theory of the granular flow is applied to numerically test the fluidization characteristics of particles in gas distributors. Three different hole diameters are considered in the simulation. Meanwhile, a fluidized-bed reactor equipment and the appropriate distributors are designed. The fluidization is tested in the cold state based on the equipment. The effect of the hole diameter on the fluidization characteristics is verified. It is shown that the ultimate pressure drop increases with the decrease of the hole diameter (1 mm, 2 mm and 3 mm). On the other hand, the critical fluidizing gas velocity increases with the hole diameter. The expansion of the bed is more significant in the case of fluidizing with 1 mm hole diameter. Also, the larger the hole diameter, the more leakage of the material, as is consistent with the observation. The particles circulate in the fluidized-bed more regularly when using the gas distributor of a smaller hole diameter. It is very important since the regular movement of the particles might improve the mixing of the material. In the steady fluidization, the solid concentration is plummeted with the increase of the height of the bed. And this trend is gentler in the case of 1mm hole diameter, which indicates that a smaller hole diameter leads to a more uniform distribution. The result also shows that the radial distribution of the solid is in a typical coreannulus structure. The velocity of the particles at the core and annulus areas decreases and increases with the increase of the hole diameter, respectively.
• Select
  Pavement performance of polyester fiber asphalt mortar and its mixture

  DONG Gang, ZHENG Nanxiang, WANG Jiafei

  Science & Technology Review. 2015, 33(3): 49-53. https://doi.org/10.3981/j.issn.1000-7857.2015.03.007

  Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save

  To study the performance of asphalt mixture with polyester fiber, polyester fiber is contrasted with lignin fiber. The test is taken for comparing the performances of the two fibers. By the tests of dynamic shear rheometer (DSR) and bending beam rheometer (BBR),the performance of polyester fiber asphalt mortar is studied. By the rutting test, low-temperature bending beam test, water stability test, and four point bending beam fatigue test, the pavement performance and the improvement mechanism of the asphalt mixture without fiber, the asphalt mixture with polyester fiber and the asphalt mixture with lignin fiber are comprehensively analyzed. The results show that the polyester fiber can evidently enhance the performance of the asphalt mixture, and that the mixture with polyester fiber obtains a better performance than the mixture with lignin fiber.
• Select
  Simulation of vehicle colliding with steel guardrail based on LS-DYNA

  CUI Hongjun, MA Xinwei, LI Hao, LAN Tian

  Science & Technology Review. 2015, 33(3): 54-57. https://doi.org/10.3981/j.issn.1000-7857.2015.03.008

  Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save

  In view of the fact that the collision test for the vehicle and the guardrail faces many problems such as it is difficult to conduct,it is costly and the data are not easy to obtain, based on the finite element code LS-DYNA, the actual impact test is simulated, with a simulation model of the vehicle and the guardrail. It is shown that the results of the simulation model test basically agree with those of the real vehicle test.
• Select
  Gas emission law in high gas goaf of fully mechanized caving face

  ZHANG Tianjun, LI Wei, LI Shugang, SONG Shuang, TANG Feng

  Science & Technology Review. 2015, 33(3): 58-62. https://doi.org/10.3981/j.issn.1000-7857.2015.03.009

  Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save

  In view of the characteristics of the coal seam gas storage and the conditions of the fully mechanized caving face, the numerical simulation and field measurement methods are used to study the distribution of the gas concentration in space under the condition of the U+I ventilation mode, and the relationship between the gas emission, the coal production and the periodic weighting is analyzed. The results of the numerical simulation show that the U+I ventilation mode can effectively reduce the gas concentration in the upper corner and the return airway. With the working face advancing, the gas enrichment zone is constantly expanded in the goaf back. And the gas concentration rises in the back of the return air side. Therefore, it is suitable to bury the pipe in the return air side of the goaf back. The results of field measurements show that the gas concentration distributes gently from the inlet side to the middle of mining faces, increasing faster in the range of 50 meters near the return air side. The absolute outflows of the gas and coal productions are in an approximate linear relationship, and the gas emission sees periodic changes after first weighting. A comparison study shows that the results of the distribution of the gas concentration obtained from the numerical simulation and the field measurements agree very well. At the same time it is feasible to bury the pipe in the return air side of the goaf back to drain the high concentration gas, and it can significantly reduce the gas emission.
• Select
  On horizontal directional drilling wall stability

  CHAI Xiwei, AI Zhijiu, FU Bin, YU Jiugang, XI Yanqing

  Science & Technology Review. 2015, 33(3): 63-69. https://doi.org/10.3981/j.issn.1000-7857.2015.03.010

  Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save

  Based on the concept of porous media, a dynamic evolution model between porosity, permeability coefficient and damage variable volumetric strain is established. The strength reduction factor conversion relationship between the Mohr-Coulomb criterion and Drucker-Prager criterion is given. Based on the Abaqus platform, the dynamic evolution model combined with the finite element strength reduction coefficient method is used to investigate the horizontal directional drilling wall stability. Engineering case calculations show that using different yield criteria may result in different safety factors. However, under certain conditions, they can be equivalent, or the numerical results are consistent with the theoretical analysis. Different effects of pressure on the slurry stability of the hole wall are studied, and it is found that under certain mud pressure, the safety factor continuously decreases with the increase of the mud pressure. At the end of expanding, the mud pressure is 2.4 MPa, the biggest plastic radius is 2.34 m and the maximum plastic strain reaches 0.393 at the hole-wall. In the limit equilibrium state, when the mud pressure is 2.4 MPa, the maximum plastic strain increases to 1.208 around the hole-wall, which is greater than the maximum strain value of expanding. The radius of plastic reaches 5.68 m, which is about 15 times the aperture.
• Select
  Flow resistance characteristics and structural improvements of managed pressure throttle

  AI Zhijiu, YU Jiugang, WANG Qin, CHAI Xiwei, ZHENG Jinxiang, LI Jie

  Science & Technology Review. 2015, 33(3): 70-74. https://doi.org/10.3981/j.issn.1000-7857.2015.03.011

  Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save

  For the pressure control in the process of drilling, the non-linearity in the throttle valve pressure drop tuning is a serious problem. In this paper, using the computational fluid dynamics (CFD) method, numerical simulations of the throttle valve in the Tarim Oilfield are carried out, and the structural relationship between the valve opening and the pressure drop is analyzed. The structure of the valve core is improved on this basis, and the linearity of the relationship between the valve opening and the pressure drop is greatly improved. It is shown that the improved throttle valve can better satisfy the requirements of the drilling pressure control technology, the improved throttle valve pressure drop characteristics are significantly improved with better linearity, and in the opening of 20% to 70%, the linear correlation coefficient is 0.973. the adjustability of the throttle valve pressure drop and, therefore the safety of MPD, are greatly improved. With the improved core structure of the valve, the vortex phenomenon of the internal flow field is ameliorated with the maximum speed being reduced by 29.78%, also the throttle manifold erosion prevention is improved.
• Select
  Analysis of fracture height influencing parameter and control in Gaoshangpu Oilfield

  YANG Zhengming, QU Haiyang, DUAN Guifu

  Science & Technology Review. 2015, 33(3): 75-78. https://doi.org/10.3981/j.issn.1000-7857.2015.03.012

  Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save

  Due to the characteristics of thin interbeded layer of the third member of Shahejie formation in Gaoshangpu Oilfield, fracture can easily propagate into water layer. This paper uses multi-factor orthogonal table to conduct a weight analysis about the fracture height impact factor in this area. The results show that the fracture height impact factor in this area follows the pecking order: geostress difference, fluid volume, rate and viscosity. Therefore, to control the fracture height, linear gel and cross-linked gel alternating injection, variable rate and plug sand injection technologies are used to alter the stress between sand and shale layers. Through the net pressure analysis and analysis of fracturing flowback fluid salinity, it is shown that fracture height has been well controlled and the fracture fails to channel the water layer.
• Select
  Effect of abnormal savda munziq on abnormal savda rat with hepatocarci based on serum metabonomic analysis

  UPUR Halmurat, MIJIT Mahmut, ISKANDAR Bakri, MIJITI Ailaiti, ARKEN Kalbinur, ABDURUSU Adil, GUO Xia

  Science & Technology Review. 2015, 33(3): 79-83. https://doi.org/10.3981/j.issn.1000-7857.2015.03.013

  Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save

  Using nuclear magnetic resonance spectroscopy, this paper studies the effect of abnormal savda munziq (ASM) on serum metabolic changes and the mechanism. According to the theory of traditional Uighur medicine, an abnormal savda rat model is established. ¹H-NMR technique is used to determinate serum metabolites in different doses of ASM. After break points, orthogonal partial least-squares discriminant analysis (OPLS-DA) is dopted for pattern recognition analysis of ¹H-NMR spectrum to distinguish changes in metabolic profiling of abnormal savda rat with hepatocarcinoma between the low, medium and high dose groups. Compared with abnormal savda rat with hepatocarcinoma, increased concentration levels of α-glucose, β-glucose, taurine are found in the ASM low dose group. For the serum of rats in the ASM medium dose group, this is also ture while lactic acid is decreased and some essential amino acids are increased. However, no such changes are seen in the serum of the ASM high dose group. Abnormal savda munziq may regulate amino acid metabolism, glucose metabolism such as energy metabolism of abnormal savda rat model with hepatocarcinoma by increasing the content of branched-chain amino acids, accelerating gluconeogenesis to increase energy supply, and reducing accumulation of lactic.
• Select
  Robot path planning method based on improved ant colony algorithm and Morphin algorithm

  WAN Xiaofeng, HU Wei, ZHENG Bojia, FANG Wuyi

  Science & Technology Review. 2015, 33(3): 84-89. https://doi.org/10.3981/j.issn.1000-7857.2015.03.014

  Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save

  A hybrid planning method combining an improved ant colony algorithm with Morphin algorithm is proposed for dynamic path planning for robot in complicated environment. Grid method is adopted to establish the model. The robot uses the improved ant colony algorithm for global path planning first, then uses Morphin algorithm for partial obstacle avoidance when it is marching on. The improved ant colony algorithm introduces an inflection point parameter to evaluate the path, so that the corner of the path is disposed and the updating mechanism of corner pheromone is changed. The Morphin algorithm is disposed with adjacent grid to meet the grid environments. This method combines the characteristics of global planning with local planning, which can not only realize real-time path planning according to the environment, but also guide the robot to the target with the global optimal path. Simulation results indicate that this method can make the robot avoid obstacles along a short and smooth path to quickly reach the target point.
• Select
  Web data mining of association rules based on an improved iterative algorithm

  LIU Xiao, LIU Yulong

  Science & Technology Review. 2015, 33(3): 90-94. https://doi.org/10.3981/j.issn.1000-7857.2015.03.015

  Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save

  With the increasing dependency of all aspects of social life on Internet, the data on the internet is becoming more and more massive, and also more complex. This heterogeneous and dynamic information which is also distributed makes the traditional data mining unable to achieve actual requirements. This paper proposes an improved iterative algorithm for web data mining: combining iteration method with a parallel algorithm. And a web data mining mode is set up by the algorithm with the idea of local computing of storage nodes, which supports the parallel association rule. Experimental results show that this mode can improve the efficiency of web data mining and its implementation rate will rise as the data quantity increases.
• Select
  A dual-interface automatic online measuring system for deposed resin

  SI Dandan, WANG Hai, TONG Mingyan, SUN Sheng, WU Hongwei

  Science & Technology Review. 2015, 33(3): 95-98. https://doi.org/10.3981/j.issn.1000-7857.2015.03.016

  Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save

  Radioactive deposed resin is a kind of long half-life solid waste, and it is required to measure the quality of resin and water before waste treatment. The weights of resin and water are calculated by liquid level height and interface height of the resin mixture in practice. This project develops a new type automatic online measurement system of radioactive waste resin level height and interface height. This system can solve the existing system problems, for example, resin interface isn't smooth and floating balls can't rise and fall normally. At the same time, bubble system, floating ball drive system and magnetostriction instrument are integrated for the first time at home. It is the first domestic dual-interface automatic online measuring system for deposed resin.
Reviews
• Select
  Recent progress in graphene fibers research

  SHI Yan, QU Liangti

  Science & Technology Review. 2015, 33(3): 99-104. https://doi.org/10.3981/j.issn.1000-7857.2015.03.017

  Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save

  Graphene fiber (GF) integrates the remarkable properties of individual graphene sheets into useful, macroscopic ensemble, which possesses the characteristics such as mechanical flexibility for textiles while maintaining the advantages over conventional carbon fibers such as low cost, light weight, shapeability, and ease of functionalization for various applications. This paper summarizes the significant advances in GFs during recent years, including the tunable and controllable preparation of GFs with functionality and their remarkable applications to unconventional devices, such as flexible fiber-type actuators, robots, motors, photovoltaic cells and supercapacitors.
• Select
  Progress on carbon materials and surface modified carbon materials of anode for microbial fuel cells

  SU Weiguang, XUE Ping, MA Baojun

  Science & Technology Review. 2015, 33(3): 105-109. https://doi.org/10.3981/j.issn.1000-7857.2015.03.018

  Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save

  Great attentions have been paid to the new technology of energy exploration and utilization due to the increasingly serious energy crisis and water pollution. Microbial fuel cells (MFCs) as a novel and efficient bioenergy utilization technology can convert chemical energy contained in organic wastewater into electricity directly. MFCs are able to treat wastewater and generate electricity energy simultaneously. Anode materials play a crucial role in determining MFCs' performance. The carbon materials are widely used as anode of MFCs because of their low price, superiority in conductivity, and good biocompatibility. The recent research progress on carbon anode materials of MFCs is reviewed in the following five aspects: the common carbon materials, three-dimensional porous carbon materials, surface chemical modification, carbon nanomaterials modification, and conductive polymer modification. The influence of three-dimensional porous structure and surface modification on electricity production performance of MFCs is discussed. Finally, the application prospects of carbon anode materials for MFCs are presented.
• Select
  Hormesis and neuroprotection

  ZHANG Chao, CHEN Shenghui, HE Chengwei, WANG Yitao

  Science & Technology Review. 2015, 33(3): 110-113. https://doi.org/10.3981/j.issn.1000-7857.2015.03.019

  Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save

  Hormesis refers to a dose-response relationship that is generally characterized as a biphasic dose response, and it induces an adaptive beneficial effect on a cell or organism at low doses but inhibits this effect at high doses. Recently, the hormesis concept attracts increasingly more attention in the field of the neural research, indicating that improving cellular adaptive ability provides a new idea and method for the prevention and treatment of neurological diseases. A class of useful stressors could markedly increase the neuronal resistance to more drastic stresses, which is defined as neurohormesis. This paper reviews the progress in hormesis research, neuroprotective effects and mechanisms of low doses of chemicals, radiation and calories restriction through inducing neurohormesis.
Focus
• Select
  Progress pattern of university science popularization:A pattern analysis based on current China's national condition

  REN Fujun, ZHAI Jiequan

  Science & Technology Review. 2015, 33(3): 114-119. https://doi.org/10.3981/j.issn.1000-7857.2015.03.020

  Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save

  A university enjoys abundant S&T knowledge resources, facilities and human resources so as to have advantages in science popularization. Generally speaking, its development so far is unsatisfactory with many problems demanding a prompt solution. During past few years, the science popularization policy of China stipulates the university science popularization and scholars put forward several suggestions. This paper points out that the systematic consideration and the model design should be used to promote the university science popularization. From the perspective of a 3 level evaluation, including the government, the university and the university science popularization, this paper discusses how to promote the university science popularization and put forward a macroscopical solution.