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   Science & Technology Review
2010, Vol.28, No. 1001
13 January 2010

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Talking about Life Value with Young Scientists

Science & Technology Review. 2010, 28 (1001): 1-1. ;  doi:
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Abstract ( 747 )
特别栏目

Science & Technology Review. 2010, 28 (1001): 8-8. ;  doi:
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Science & Technology Review. 2010, 28 (1001): 10-10. ;  doi:
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Science & Technology Review. 2010, 28 (1001): 12-13. ;  doi:
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Science & Technology Review. 2010, 28 (1001): 14-15. ;  doi:
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Science & Technology Review. 2010, 28 (1001): 16-17. ;  doi:
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Science & Technology Review. 2010, 28 (1001): 125-125. ;  doi:
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Science & Technology Review. 2010, 28 (1001): 138-138. ;  doi:
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Science & Technology Review. 2010, 28 (1001): 139-139. ;  doi:
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Abstract ( 467 )
封面图片说明

Science & Technology Review. 2010, 28 (1001): 8-8. ;  doi:
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Abstract ( 465 )
半月科技风云

Science & Technology Review. 2010, 28 (1001): 9-9. ;  doi:
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Abstract ( 722 )
科技事件

Science & Technology Review. 2010, 28 (1001): 11-11. ;  doi:
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Abstract ( 502 )
科技工作者建议

Science & Technology Review. 2010, 28 (1001): 18-18. ;  doi:
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Abstract ( 757 )
Exclusive

Science & Technology Review. 2010, 28 (1001): 19-29. ;  doi:
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Abstract ( 854 )
Based on the event every year for selecting the annual important advances about science, technology and engineering held by the Editorial Department of Science and Technology Review Publishing House, with the principles of evaluating within each branch, our journal recommendation, experts selection, putting quality before quantity, and giving facts in time order, 10 important scientific achievements, 10 important technological achievements and 10 important engineering achievements in China in 2009 were selected by relevant experts and scholars, based on candidate items recommended by our journal, which originated from a lot of scientific news in the columns "Sci-Tech News Ranking for the Half-month", "News Round", "Domestic News Briefs", "Domestic Journal Highlights",
"Scientific Community Briefs", "Events" and "Cover Story" in Science and Technology Review, and key academic journals and scientific newspapers. These achievements included the discovery of the maximum strength in nanotwinned copper and ultra-high strain hardening effect, deficiency of a β-arrestin-2 signal complex contributes to insulin resistance, a pressure-induced transformation of sodium into transparent insulating states, running test of the domestic first practical middle-low speed maglev train, the global first practical prototype of nanosecond solid-state deep UV laser source has been successfully developed, the world's largest diameter large field optical astronomical telescope has been built, successful trial run for megaton demonstration project of Shenhua coal direct liquefaction, completion and operation of the domestic first UHV AC Power transmission and transformation project, moon-landing success for Chang'e-1 and perfect ending of the first phase project of China's lunar exploration, etc.
Articles

Study of cope ion on the photo-catalytic properties of TiO2

Science & Technology Review. 2010, 28 (1001): 30-34. ;  doi:
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Abstract ( 1565 )
Nanometer TiO2 and Cu2+/TiO2 composite material was prepared by the sol-gel method. During the process of preparing the antibacterial TiO2 and Cu2+/TiO2, with various contents of Ti(SO4)2 and copper ion, a series of TiO2 sol and Cu2+/TiO2 sol were obtained. They were characterized with the laser diffraction particle size analyzer, XRD and TEM. The results show that the size of TiO2 grains ranges in 3.9~97.9nm, with an effective diameter of 63.6nm and a polydispersity of 0.222. The effective diameter of Cu2+/TiO2 is 58.4nm, with the polydispersity of 0.237. The TiO2 was anatase, and the diameter of Cu2+/TiO2 sol is slightly smaller than that of TiO2, but the performance against photodegradation may be better than TiO2 sol. TiO2 and Cu2+/TiO2 are compared by the catalytic degradation of methyl blue to see the impact of the polymerize reaction time, surfactant, light source, Cu2+/TiO2 film and the concentration of copper ion on the photo-catalytic of TiO2. Our experiments show that Cu2+/TiO2 sol has better photocatalytic activity than TiO2 sol, with the optimal concentration of copper ion of 0.5%.

Synthesis and Characterization of Coumarin-3-Carboxylic Acid Eugenol Ester and Its Use in Cigarette as a Flavor

Science & Technology Review. 2010, 28 (1001): 35-39. ;  doi:
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Abstract ( 645 )
In order to develop a new cigarette flavor precursor, coumarin-3-carboxylic acid eugenol ester was synthesized from coumarin-3-carboxylic acid and eugenol. The structure of the title compound was characterized by IR, 1HNMR, 13CNMR, HRMS and thermal analysis. The pyrolysis products were identified by means of pyrolysis-GC/MS, and the effect of the title compound on the flavor of cigarettes by smoking was evaluated. The results show that: (1) 22 compounds were identified at 600℃, and most of them were alkenes, alkanes, acids, and phenolic substances; (2) eugenol was identified, indicating that coumarin-3-carboxylic acid eugenol ester can release a certain amount of eugenol at the smoke temperature; (3) eugenol coumarin-3-carboxylic acid ester can improve and modify the flavor, enhance the notes of sweet aroma and bean aroma., and reduce the biting taste of cigarette smoke. Therefore, coumarin-3-carboxylic acid eugenol ester can be used in cigarette as an excellent flavor precursor.

Karyotype Analysis of Hedysarun polybotrys Hands.-Mazz

Science & Technology Review. 2010, 28 (1001): 40-43. ;  doi:
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Abstract ( 678 )
The Hedysarun polybotrys Hands.-Mazz. is a perennial herb. No reports have been seen in literature about the karyotype analysis of Hedysarun polybotrys Hands.-Mazz. To study the evolution, identification and fine seeds selection through Hedysarun polybotrys Hands.-Mazz. chromosome number and karyotype, the common (slice-making) method combined with micrograph was used to obtain the chromosome number and karyotype of Hedysarun polybotrys Hands.-Mazz.. The results show that the fukanensis is diploid, and the chromosome number of somatic cells is 2n=14. The karyotype formula is 2n=2x=14=10m+4sm, where the 4th and 7th are submetacentric, and the others are metacentric. Its index of asymmetry is 60.45%. The karyotype of Hedysarun polybotrys Hands.-Mazz is of "2A" type of stebbins, and it is a primitive species. This study provides a scientific basis for identification of the Hedysarun polybotrys Hands.-Mazz. and Astragalus membranaceus.

RAW264.7 Cell Induced Differentiation and Identification

Science & Technology Review. 2010, 28 (1001): 44-47. ;  doi:
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Abstract ( 676 )
This paper studies the identification method by inducing RAW264.7 into osteoclast, to find the best procedure, for in vitro functional researches, as a preferable preosteoclast model in respect of its osteoclast characteristic gene expression profile. The inoculate RAW264.7 in 96 well plates, cultured with the bone ground section, of a concentration of 100ng/mL, was used to induce mouse sRANKL for 10 days, which was then examined with respect to morphology and functional identification and detection, using HE staining, Toluidine Blue staining, TRAP staining and SEM observation. It is concluded that with the increase of the induced time, the number of polykaryocyte cells and the amount of Howship's lacuna increase. Among all kinds of methods of identification, HE staining and Toluidine Blue staining are simple but not reliable; the SEM observation is accurate , but complex; and TRAP staining is accurate and shows strong specificity, but is expensive. The results show that the TRAP staining is the best method in view of morphology identification, SEM observation is the best method in view of functional identification. RANKL can induce RAW264.7 cell into mature osteoclast for morphology and functional identification and detection, which can serve as a basis for our future experimental research about mature osteoclast.

Science & Technology Review. 2010, 28 (1001): 48-50. ;  doi:
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Abstract ( 619 )
To study the significance of apoptosis-related gene PTEN in Hazak's esophageal cancer, the Reverse Transcription Polymerase Chain Reaction (RT-PCR) and Western-blotting are adopted. The expression of PTEN gene mRNA is detected in 36 cases of esophageal cancer tissues and tumor-adjacent normal tissues by RT-PCR. Then the expression of PTEN protein is detected in some samples with difference in transcriptional level by Western-blotting. Results show that the overall positive rate of PTEN gene mRNA expression in the 36 cases of esophageal cancer tissues is 83.33%, and that in tumor-adjacent normal tissues is 25%. The expression of PTEN protein level in tumor tissue sees no difference as compared with tumor-adjacent tissue. It is suggested that the abnormal expression of PTEN gene affects the occurrence of Hazak's esophageal cancer mainly in the transcriptional level, which warrants a further study.

An Approach to Improve the Performance of Long Period Fiber Grating Bio-layer Sensor

Science & Technology Review. 2010, 28 (1001): 51-54. ;  doi:
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Abstract ( 613 )
According to the Coupling Mode Theory(CMT) and the simplified three-layered model of the step-index single mode optical fiber, the variation of the bioactive layer refractive index may be used to detect whether the corresponding antigen is in blood by coating an idiosyncratic bioactive layer on the cladding of Long Period fiber Gratings (LPG). The results show that, with the introduction of chirp in LPG, the sensitivity of the resonant wavelength shift is improved, but the peak of transmission intensity is lowered. With the further increase of chirp, the peak of transmission intensity varies little and the resonant wavelength shift becomes more sensitive. The variation of wavelength shift is decreased gradually when the chirp reaches a certain magnitude. Silicious layer is used as fundus layer since its refractive index is much the same as that of antigen and antibody. The thickness of fundus layer is about 120nm, which amounts to the ideal linear scale of wavelength shift for better measurements.

Microbial Leaching Desulphurization of Coal Wastes in Natural Conditions

Science & Technology Review. 2010, 28 (1001): 55-58. ;  doi:
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Abstract ( 660 )
The treatment of coal wastes in coal mine areas is a difficult issue. A strain of chemolitho autotrophic sulfur oxidizing bacteria was isolated from coal wastes in the lab to study its desulphurization effects on coal wastes coming from Dawukou coal mine areas. The pole leaching experiment was conducted in natural conditions. The results show that the microbe can promote sulfur oxidation in the coal wastes. It also can reduce the pH value and increase electricity conductivity (EC) in the leaching solution. The iron was emerged from the coal wastes. The microbe can shorten the desulphurization periods. The sulphate concentration was enhanced after leaching 4 times. The desulphurization rate can reach 67.6% and its desulphurization distribution rate is 11% after leaching 15 times. EC and pH values were measured in the coal wastes after desulphurization. pH value was increased and EC decreased significantly in the coal wastes medium. That will make the coal wastes more stable in their properties, which may contribute to the ecological restoration with respect to the coal wastes and promote environmental sustainable development in the coal mine areas.

Graphlike Manifolds with Contraction W8 and W9

Science & Technology Review. 2010, 28 (1001): 59-62. ;  doi:
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Abstract ( 749 )
Consider an undirected simple connected graph, in which each vertex is replaced by a manifold (a pipe) and each edge is replaced by the Cartesian product of this manifold (a circlar section). The topological space obtained in this way is called a graphlike manifold. The undirected simple graph is called the contraction of graphlike manifolds correspondingly. If the circlar sections of graphlike manifolds have different maps, we will have different graphlike manifolds. There are infinite graphlike manifolds, and the number of homeomorphic classes is also hard to count, nearly infinity. The problem of counting the numbers of homeomorphics classes of graphlike manifolds, and give each homeomorphics classes a representive graphlike manifold, is just the case for the topological classification of graphlike manifolds. This paper discusses the topological classification of graphlike manifolds with the contraction of Wn and the number of homeomorphic classes of graphlike manifolds of Wn. A representative system is formed by all non-isomorphic colorings, and the necessary cases are counted. According to the graph colouring theory and twist operation, the homeomorphic classes of grapglike manifolds W8 and W9 are found to be 18 and 30, respectively.

Min-Max Distance Response Surface and Kreisselmerier-Steinhauser Function

Science & Technology Review. 2010, 28 (1001): 63-68. ;  doi:
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Abstract ( 718 )
The current Response Surface Methodology(RSM) is based on the least squares method. This paper proposes a new response surface fitting method, which let the maximum distance among the response hypersurface function and sample values be minimized. In this method, a mathematical model is built based on the characteristics of Kreisselmerier-Steinhauser function. The coefficients of the response hyper-surface function can be determined by taking derivatives, carrying out Taylor expansions and numerical iterations. The result of the least squares method is used as the initial value in the process of numerical iteration. According to a series of calculated cases, three conclusions are reached. First, the response hyper-surface function obtained from the Kreisselmerier-Steinhauser function method satisfies the condition of minimizing the maximum distance. Second, compared with the counterpart obtained from the least squares method, the response hyper-surface function obtained from this method could noticeably reduce the maximum distance in case that the RMS of sample values increases in a small scale. Third, the adoption of a method of changing stretching factor could lead to a better solution. The method proposed in this paper not only provides a response surface method but also can ensure the maximum distance among the response hyper-surface function and sample values minimized in practical engineering problems.

A New Anisotropic Diffusion Algorithm for Remote Sensing Image Denoising

Science & Technology Review. 2010, 28 (1001): 69-73. ;  doi:
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Abstract ( 600 )
Noise reduction is an important research topic for the remote sensing image processing, and the commonly used noise reduction methods usually cause a loss of the details. In order to effectively reduce the noise and keep the edge information intact at the same time, a new anisotropic diffusion algorithm based on the information measure and the edge membership is proposed. As the local feature of remote sensing image which has anisotropic diffusion in the heterogeneous area and isotropic diffusion in the homogeneous area, the core content of this algorithm is to divide the remote sensing image into two areas, the edge area and the non-edge area. While the conventional Perona-Malik diffusion equation is used into the non-edge area to filter the noise, and the nonlinear diffusion equation based on the information measure is used into the edge area to filter the noise and enhance the edge and details. The final results show that this algorithm's Peak Signal to Noise Ratio (PSNR), Maximum Absolute Error (MAE) and radiometric resolution are better than the traditional algorithms. Experimental results also prove that the algorithm can greatly enhance the equivalent number of looks of the remote sensing image and effectively inhibit the coherent noise of the remote sensing image. So this algorithm has practicality and potential application value.

APPLICATION OF ARTIFICIAL FISH-SWARM NEURAL NETWORK IN COILING TEMPERATURE FORECASTING OF HOT ROLLED STRIP

Science & Technology Review. 2010, 28 (1001): 74-77. ;  doi:
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Abstract ( 569 )
The coiling temperature forecasting, as a non-linear optimal problem, is very important to the performance of hot rolled strip products. Based on the individual local searching, the Artificial Fish-swarm Algorithm(AFSA) is a new optimal strategy, with good capability to avoid the local extremum and obtain the global extremum. In this paper, an Artificial Neural Network(ANN) based the forecasting model of AFSA is proposed, with the weights being trained by AFSA, and the neural network of AFSA being applied to coiling temperature forecasting. Applying the forecasting method to a certain actual hot rolled strip, it is shown that comparing with the traditional BP neural network forecasting method, the presented forecasting method has better adaptive ability and can give better forecasting results. The artificial fish-swarm algorithm network is trained and checked with the actual production data. The result indicates that the method can predict the strip coiling temperature in real-time.

A application of mixed-phase deconvolution in the processing of seismic data

Science & Technology Review. 2010, 28 (1001): 78-81. ;  doi:
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Abstract ( 555 )
Mixed-phase deconvolution is proposed to process the seismic data,, with a new flowchart of the mix-phase deconvolution, based on the fact that the seismic wavelet is a mix-phase wavelet. Firstly, the amplitude spectrum of the seismic .wavelet is fitted by least squares method according to the relationship between the autocorrelation of the seismic records and the autocorrelation of the seismic wavelet, and then the autocorrelation of the seismic wavelet is computed anew. Secondly, a minimum phase filter is designed by using computed autocorrelation of the seismic wavelet, a delay is added to the dominant diagonal of the autocorrelation function, a minimum phase filter is decomposed into a short filter and is convoluted with a longer filter, resulting in a series of mixed phase wavelets and a mixed phase filter. Finally, the resulted mixed phase filter is convoluted with raw seismic traces, and an optimal mixed phase filter and an associated mixed phase wavelet are selected. The model test and the real data processing show that the mixed phase deconvolution is better than the minimum phase deconvolution.

NPP Spatial Distribution of Forest Ecosystem Based on SPA Model

Science & Technology Review. 2010, 28 (1001): 82-89. ;  doi:
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Abstract ( 834 )
The forest ecosystem Net Primary Productivity(NPP) is the driving force for the forest ecosystem carbon cycle and an important component in the terrestrial forest ecosystems carbon cycle, because it represents the capacity of the forest ecosystem to fix CO2 in the atmosphere. NPP plays a significant role in assessing whether the concentration of CO2 can be reduced in the atmosphere and the biosphere can be protected against global warming or not. Based on the British Edinburgh University's forest ecosystem carbon cycle SPA(Soil-Plant-Atmosphere) model, and using the remote sensing data as a major source of the data to expand the model from a patch model to a region model, this paper presents a new forest ecosystem carbon cycle dynamic process RSPA(Region Soil-Plant-Atmosphere) model, with the aid of the data parallel computing and the cluster technology as a solution to the excessively long computing time due to the model expansion. This model is used to simulate and verify the NPP of the forest ecosystem in Youxi County, Sanming City, Fujian Province in 2007. The results show clearly the NPP seasonal spatial distribution variation of Youxi County forest ecosystem in 2007. Its forest cover plants grow during the exuberant season from June to September, where the NPP provides the growth peak value, but other months' NPP values are relatively small. With respect to the forest cover plant solid carbon ability, we have: the broad-leaved forest>bamboo>Chinese fir>pine forest.

Development of Emulation Programmer for Underground 3-D Geophysical Metal Targets

Science & Technology Review. 2010, 28 (1001): 90-93. ;  doi:
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Abstract ( 598 )
Based on the underground EM wave method, the electromagnetic scattering emulation software for 3D metal target in a lossy medium is developed with the methodology of modularization and the paradigm of object-oriented design. Firstly, the numerical method of the simulation software is as follows. (1) Hallen integral equation is solved to analyze the antenna's currents; (2) based on the Electric Field Integral Equation(EFIE), the surface currents of the metal target is calculated, to obtain the scattering field and the total field. The basic structure and functions of the software are as follows. It is composed of control module, project management module, input module, analysis and calculation modules. The specific design and implementation of the software are described in this paper by modules. The new algorithm is verified by a simulating instance. It is shown that the emulation results agree well with the experiment results, which indicates the reliability and the validity of the software. The software can be used for analysis of scattering characteristics of underground targets and the different objects detection in geophysical exploration in the deep underground medium.

Determination Two Key Dissolution Coefficients in Calculation of CO2 Storage Capacity

Science & Technology Review. 2010, 28 (1001): 98-101. ;  doi:
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Abstract ( 640 )
CO2 sequestration in the reservoir is an important way to ease the CO2 emission; many scholars at home and abroad are research on CO2 storage capacity. The Calculation of the CO2 storage capacity has a certain practical significance for the development of China's CO2 emission reduction targets.We have analysed the correction formula of CO2 storage in the formation and study the dissolution coefficient which were mentioned in the formula. Because the capacity of CO2 storage in the form of dissolved CO2 occupied most of total capacity. So it can not be ignored, and the calculation of this part of the capacity of CO2 storage depending on two parameters are dissolution coefficients Cws and Cos. The solubility calculation models which were developed by Zhenhao Duan and Haitao Xue were improved and the value of dissolution coefficient Cws and Cos were obtained. Then, the application of dissolution coefficients to a revised method of calculating the CO2 storage capacity under the different conditions of oil reservoirs. The determination of CO2 dissolution coefficients Cws and Cos can be used to calculate the CO2 storage capacity in the oil reservoirs more accurately. Finally, we calculated the theoretical and effective CO2 storage capcacity in a domestic Oilfield and used the results obtained to compare with the evaluation results obtained by the analogy. The result shows that the calculation method is correct and reliable.
Reviews

Wavelet Transform Used in Image Denoising

Science & Technology Review. 2010, 28 (1001): 102-106. ;  doi:
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Abstract ( 640 )
This paper reviews studies of wavelet transform used in image denoising. Image denoising is an indispensable part in image processing, and plays an important role in the field of computer vision. As there is only a single scale in the frequency domain, only a general information can be extracted from the image. The multi-scale and multi-resolution features of wavelet domain make it possible for image denoising to be conducted at different scales. For a better understanding of image denoising, this paper first discusses briefly the mathematical model of image noise, the basic principles and the traditional methods used for image denoising and then, the image denoising theory based on wavelet transform. Three kinds of image denoising methods commonly used in wavelet demain are highlighted, as well as, the advantages and disadvantages of these methods. Finally, the recent development of the wavelet de-noising is reviewed.

The Modeling of Visual Selective Attention and Its Applications

Science & Technology Review. 2010, 28 (1001): 107-115. ;  doi:
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Abstract ( 614 )
Visual Selective Attention (VSA) modeling is an advanced topic in cognitive information perception. It bridges neurophysiology, psychology and computer vision, and it aimed at developing a human-like visual system for computer. It shows a wide and promising application in intelligent computer vision from the late of last century. Firstly, recent VSA research topics in VSA modeling area are introduced in this paper, while the important and key problems are analyzed and discussed in details. In these topics, origin of bottom-up interesting map, representation of visual task and object, combination of bottom-up and top-down information, and fixation shifting in overt attention are taken as the highly influential aspects and thus described elaborately. The controversial issues in these topics are discussed as well. Secondly, in the view of application, the significance of VSA modeling are demonstrated by introducing and analyzing its successful application instances in video compression, target detection, and advertisement design,. The inevitable problems and challenges of VSA modeling are summarized and its possible future applications from VSA modeling are prospect in the end.

Science & Technology Review. 2010, 28 (1001): 116-116. ;  doi:
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科技评论

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Focus

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主编心语

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走向职场

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