bluuebunny/crossref_metadata_2025 huggingface dataset:
Determination of Zirconium, Niobium, Vanadium and Chromium in the Titanium Ore by Microwave Digestion – ICP-OES
Authors: Cheng Yong
Published: March 2013

Abstract: Appropriate ratio of mixing digestion solvent which consist of HF and HNO3 have been tested firstly and combine with the high-pressure sealed microwave heating method, the titanium ore samples can be quickly and completely digested into solution. Then the elements content of zirconium, niobium, vanadium, chromium can be determined at the same time by applying the inductively coupled plasma atomic emission spectrometry (ICP-OES) method under hydrofluoric acid media condition.This method has solved the problem that the titanium ore matrix and impurities of zirconium oxide, niobium oxide, chromium oxide and other insoluble oxides are all difficult to digeste under normal conditions by the acid. Through fluoride ion complex reaction, make sure the easy hydrolysis of titanium ore matrix and niobium, zirconium and other elements to form the shape of the complex ion, even in the low acidity of the solution does not produce the hydrolysis reaction, so that it can greatly reduce the detection solution acidity to eliminate the blank background and acidity effects. The experiments investigated the impacts between the sample digestion conditions such as microwave heating procedures, reagents ratio, amount, and the titanium matrix as well as coexistent elements. Besides, it optimized the detection parameters of the ICP spectrometer under the conditions of using unconventional resistance to hydrofluoric acid PTFE nebulizer. Spectral interferences and matrix effects have been eliminated by selecting the appropriate analyte spectral lines as well as the integrated use of matrix matching and synchronization of the background correction method. The results show that the background equivalent concentration is 0.0002% ～ 0.0008%, and the detection limit is 0.0029 ～ 0.0018%, trace element recovery rate is 91.0% and ～108.0%, RSD is ≤ 4.71%.
Effect of Oxidation on Phase Transformation in Ti-Bearing Blast Furnace Slag
Authors: Zhang Wu , Zhang Li , Feng Nai Xiang
Published: March 2013

Abstract. Effect of oxidation on phase transformation in Ti-bearing blast furnace slag is studied. The slag is analyzed by X-ray diffraction (XRD) and scanning electron microscope (SEM), EDX and metallographic microscope. The experiment results indelicate that the phase composition of the oxidized slag is simpler which are only rutile and glass phase. The titanaugite, Ti-rich diopside and perovskite phase are vanished and most of the Ti components were enriched in the rutile phase.
Experimental Research on Mechanical Behavior of Carbon Fiber Reinforced Concrete under Different Length of Carbon Fiber
Authors: Wang Xiao Chu , Zhang Jian Peng , Liu Hong Tao
Published: March 2013

To further study the mechanical properties of carbon fiber reinforced concrete (CFRC) about carbon fiber length, and determine the optimum length of the fiber. In this paper, based on the test, the enhancement effect of four different length of carbon fiber reinforced concrete is studied. Compressive strength curves and load-deformation curves of the test blocks mixing the different lengths carbon fiber are obtained. In the loading process, the change curve of the ratio of transverse strain and longitudinal strain are obtained. The results showed that the compressive strength increase and after decrease with the increase of fiber length. When the length of carbon fiber is 10 mm, the improved effect is best, and it can effectively improve the brittle failure of concrete. When the length of carbon fiber is more 30 mm, the improved effect of deformation of carbon fiber reinforced concrete is not obvious.
Synthesis of Carbon Onions with High Purity by Chemical Vapor Deposition
Authors: Chen Lei Shan , Wang Cun Jing
Published: March 2013

Nano-carbon materials were synthesized by decomposing acetylene at 400 °C using iron supported on alumina as catalyst. The catalysts contain about 0.3 and 5.2 wt% iron. The products were refluxed in concentrated HCl at 80°C for 36 h in order to remove the catalyst support. The samples were examined by transmission electron microscopy and X-ray diffraction. The results show that carbon onions surrounding Fe3C core were obtained using the catalyst containing 0.3 wt% iron and these carbon onions had a structure of stacked graphitic fragments, with diameters in the range 15-50 nm.
Sythesis of Molecularly Imprinted Polymers for the Binding and Recognition of Nonylphenol
Authors: Bi Yan Jie , Li Wen Yan , Yuan Chen , Wang Bin Song
Published: March 2013

In this paper, molecularly imprinted polymers with high selectivity for nonylphenol (NP) were synthesized by sol-gel process using 4-vinylpyridine (4-Vpy) as functional monomer, ethyleneglycol dimethacrylate as crosslinker (EGDMA), azobisisobutyronitrile (AIBN) as initiator, NP as template molecules. The performance of imprinted material was evaluated by adsorption kinetic, adsorption isotherm and adsorption selectivity. The results indicated that this material had not only binding properties but also high selectivity to the template molecule, which had good application prospects in the selective enrichment and separation of NP for pretreatment and analysis of complex environmental samples.
Antifungal Activity of Endophyte Cultures of Morus alba L. against Phytopathogenic Fungi
Authors: Zheng Li Ping , Zhang Zhen , Xie Li Qun , Yuan Hui Yan , Zhang Yu Qing
Published: March 2013

A total of 106 strains of endophytic fungi were isolated from mulberry tree. 86 strains of the total isolates belonged to 18 genera. The dominant species were Fusarium spp. (22.6%) and Alternaria spp. (15.1%). The isolation frequency of endophytes was around 47, 38 and 15%, respectively to roots, branches and leaves. About 54% of the isolates could produce antifungal metabolites against at least one plant pathogenic fungi. Endophytic Aspergillus sp. A204, Colletotrichum sp. C103 and Penicillium sp. P306 showed broader antifungal spectrum. The strain C103 showed stronger potential with growth inhibition rates higher than 50% against all of the selected phytopathogens. The minimum inhibition concentrations (MICs) of the EtOAc extract of C103 culture against Botrytis cinerea, Fusarium oxysporum, Myrothecium rorideum was 1.5, 0.5 and 0.5 mg/mL, respectively, indicating that endophytic fungi may play an important role in protection of mulberry tree from disease as well as an excellent resource for natural antifungal compounds.
Application Research of Biodegradable Base Oil in the Green Metal Cutting Fluid
Authors: Wang Lin , Wang Da Zhi , Han Sheng
Published: March 2013

This paper mainly enumerated several kinds of base oil which all have a good biodegradation, such as vegetable oil, synthetic ester, poly-alpha-olefin, polyethylene glycol , introduced their performances, functions, the research status and the application prospect in the cutting fluid and brings forward the direction of the metal cutting fluid's development.
Analysis of Flora Distribution and Drug Resistance in Sputum Culture from Patients with Lung Cancer
Authors: Hao Feng , Ma Rui Ze , Wang Xue Yan , Xu Hui Jing , Fang Fang , Zhang Li , Zheng Hui , Zang Yu Xuan , Li Yan
Published: March 2013

Abstract. Lung cancer takes the first place among all the cancer mortality and then it becomes important to study how to use antibiotics reasonably during clinical treating. Now we analyze lung cancer patients’ sputum samples Flora distribution and drug resistance and results are as follows. According to retrospective study, we analyzed lung cancer patients and identify the bacterial with routine sputum culture method strictly. At the same time, we use SPSS 19.0 soft to take a statistical analysis and judge flora drug resistance with CLSI. In the sputum culture , the rate of G- bacillus is 69.1% and it has high drug-resistance to cephalosporin, ampicillin and piperacillin, and it is sensitive to imipenem fairly.The rate of G+ coccus is 10.1% and it is resistance to penicillin, ampicillin , oxacillin and erythromycin ,and is sensitive to vancomycin . The rate of fungi is 20.8% and has obvious resistance to Pyrroles. The clinic should care more about the quality of the sputum samples, use targeted and reasonable antibiotics and control the flora drug-resistance .
Bioinformatics Analysis and Characteristics of Capsular Exopolysaccharide Family Gene and its Encoding Protein in Riemerella Anatipestifer
Authors: Yi Hai Bo , Zhu De Kang , Wang Xiao Jia , Cheng An Chun , Wang Ming Shu
Published: March 2013

To provide some evidence for further research on the biological function of capsular polysaccharide family gene and its endcoding protein of Riemerella anatipestifer.we analyzed the sequence of capsular exopolysaccharide gene and physicochemical properties , structure , function of capsular exopolysaccharide family protein by bioinformatics tools online.We found that capsular exopolysaccharide family gene is an open reading frame with 2373 bp in length and contained a single ORF, which consisted of 732 adenine,443 cytosine,321 guanine,877 thymine and a GC content 32.20%. The NC value of the nucleotides sequence of capsular exopolysaccharide family gene was 44.270. Capsular exopolysaccharide family protein consisted of 790 amino acids and had the following characteristics: numerous highly hydrophilic region, two transmembrane domains, zero signal peptide cleavage site, numerous functional sites. We obtain more biological information about capsular exopolysaccharide family gene and its endcoding protein by bioinformatic analysis, which provide some basic information for further research.
Dosimetry Analysis of Three Kinds of Radiation Technique for Postoperative Gastric Cancer
Authors: Tang Hua , Luo Ju Dong , Lu Xu Jing , Chen Ling , Ma Yan , Cao Jian Ping , Zhang Shu Yu , Ling Yang , Zhou Xi Fa
Published: March 2013

Objective: To compare dose-volume histograms (DVHs) and the dose distribution of three-dimensional conformal radiotherapy(3DCRT),7 fields radiotherapy(7FRT) and intensity-modulated radiotherapy (IMRT) of treatment planning in gastric cancer. Methods: We selected 5 patients with gastric cancer, they were pathologically confirmed stage T3,T4 or N+ gastric cancer. All patients underwent radical gastrectomy. A dosimetry study was carried out on these five patients. For each patient, three kinds of treatment planning were designed with a prescribed dose of 45Gy to 95％of PTV.Many kinds of parameters of these plans in each patient were compared: isodose distributions line、dose-volume histogram(DVH)、V95%、V110%、CI、HI、EI of target volume and the dose of related critical organs. Results: IMRT was superior to 3DCRT and 7F-RT in dose uniformity（p＜0.05）, there was no statistical difference between 3DCRT and 7FRT in CI（p>0.05）.IMRT had better dose conformity than 3DCRT and 7FRT（p＜0.05）, and 3DCRT was better than 7FRT in CI（p＜0.05）.IMRT showed better EI than 3DCRT and 7FRT（p＜0.05）,there was no statistical difference between 3DCRT and 7FRT in EI（p>0.05）.IMRT had advantage at sparing liver compared with 3DCRT and 7FRT（p＜0.05）,7FRT showed better D1/3 of liver than 3DCRT（p＜0.05）,but there was no statistical difference between 3DCRT and 7FRT in Dmean of liver（p>0.05）.IMRT expressed better Dmax of spinal cord than 3DCRT and 7F-RT（p＜0.05）, and 7FRT was better than IMRT in Dmax of spinal cord（p＜0.05）.But the dose received by the both kidneys were not significantly different. Conclusion: IMRT is superior to 3DCRT and 7FRT,and 3DCRT plans showed better CI and Dmax of spinal cord composed to 7FRT,and 7FRT was superior to 3DCRT in D1/3 of liver. IMRT for gastric cancer had physics advantage for clinical application.
Parasporal Crystal Proteins of Bacillus thuringiensis ly36 Strain Demonstrating Bacteriacidal and Cancer Cell-Killing Activities
Authors: Lin Yi , Liao Li Min , Lin Shu Fang
Published: March 2013

The growth of Bacillus subtilis was highly inhibited by crystal proteins of Bacillus thuringiensis ly36 strain with or without the treatment of proteinase K. And human hepatoma cell lines SMMC-7721 and Bel-7402 were killed by the proteinase K-treated crystal proteins of B. thuringiensis ly36 strain.
Researches on Inducing Effects of Autoclavable IPTG and Lactose Solution on Gene Expression in Genetically Engineered Bacteria
Authors: Zhao Gan , Liang Lin Lin , Xu Dan Yun , Liang Li Hua , Wang Dao Zhou , Li Hai Yin
Published: March 2013

The inducing effects of autoclavable IPTG and lactose solution on gene expression in genetically engineered bacteria were studied. Compared with the filter-sterilized one, the autoclavable IPTG and lactose solution of the same concentration can also show the same inducing effects respectively . All these mean that the IPTG and lactose solution used to induce gene expression in genetically engineered bacteria can be prepared more simply and more convenient so that the waste produced in the process of filter-sterilization can be prevented.
The Effect of T-7 Peptide on Human Non-Small-Cell Carcinoma A549 Cells
Authors: Wang Shu Jing , Jiang Shan , Liu Jia , Wang Fei , Chen Ning , Liu Lin , Zhao Ying , Zhang Xiao Dan
Published: March 2013

7 peptide of Tumstatin(T-7 peptide) is composed of 185-191 amino acids. To study T-7 peptide antitumor activity to human non-small-cell carcinoma(A549), T-7 peptide was designed and synthesized by amino acid synthesizer. Its purity ran up to 98.45% by HPLC and MS. The effect of T-7 peptide on A549 cell growth was observed by MTT assay, growth curve and transmission electron microscopy(TEM). T-7 peptide had the effects of suppressing A549 cell growth and promoting its apoptosis, showing dose- and time-dependent. Its IC50 was 92.84 μg/ml. TEM also revealed that A549 cell treated with T-7 peptide appeared apoptotic morphology,such as cell pyknosis and mitochondrial vacuoles formed. While T-7 peptide had little effect on human umbilical vein endothelial cells(ECV304). These researches were significant to treat human non-small-cell carcinoma in the future.
The Effects of Ligustrazine on the Expression of Bax Protein and Cytochrome C Following Focal Cerebral Ischemia/Reperfusion Injury in Rats
Authors: Zhao Qiu Zhen , Liu Hua , Li Hua Guang
Published: March 2013

AIMS: To explore gene expressions of Bax and changes of cytC releasing in the CIR hippocampus neuron; to observe the effect on CIR with ligustrazine. METHODS: According to Bannisters, we made ischemia and reperfusion models of rat, and then using ligustrazine to cure; we observed the expression changes of Bax gene in hippocampus neurons by nucleic acid in situ hybridization, detecting cytC release through Western blotting. RESULTS: Ligustrazine protect neuron by reducing neuronal apoptosis induced by CIR, and inhibiting release of cytc by releasing.
The Relationship of Pathological Datas of Gastric Cancer Patients after Radical Gastrectomy with Radiotherapy
Authors: Luo Ju Dong , Lu Xu Jing , Chen Ling , Ma Yan , Kong Ying Ze , Ling Yang , Zhang Shu Yu , Cao Jian Ping , Zhou Xi Fa
Published: March 2013

Mdthod :110 gastric cancer patients were selected from Feb 2004 to Jan 2006, who had complete pathological data and were underwent radical resection. All patients were diagnosed by endoscopy, preoperative histologic diagnosis and exclusion from distant metastasis, using D1 or D2 lymph node dissection, postoperative pathology confirmed stump negative. Univariate analysis was applied on the pathologic information and multivariate analysis was applied based on the univariate analysis. Result :(1)Univariate analysis showed that tumor diameter、histology、vascular invasion、lymphatic vessel invasion and neural invasion were correlated with T/N classification.Multivariate analysis showed that vascular invasion and lymphatic vessel invasion were correlated with T classification and lymphatic vessel invasion was associated with N classification. (2) For T and N stages, lymphatic vessel invasion was strongly related factor. Conclusion: For T and N stages,, lymphatic vessel invasion was strongly relevant factor. For patients with confirmed lymphatic vessel invasion, postoperative adjuvant radiotherapy is suggested.
Kinetics of Inhibition Effect of 4-hydroxy-3-methoxybenzoic acid on Mushroom Tyrosinase
Authors: Gong Sheng Zhao
Published: March 2013

A study on the kinetics of inhibitory effect of 4-hydroxy-3-methoxybenzoic acid on the monophenol- and diphenol-oxidation activity of mushroom tyrosinase has been carried out using enzymological kinetic analysis method in a Na2HPO4-NaH2PO4 buffer solution (pH=6.8) at 30 °C. The results show that 4-hydroxy-3-methoxybenzoic acid efficiently can inhibit both monophenol- and diphenol-oxidation activity of mushroom tyrosinase under experiment conditions. Concentrations of 4-hydroxy-3-methoxybenzoic acid leading to 50 % inhibition rate (IC50) on monophenol- and diphenol-oxidation activity were calculated to be 1.3 mmol/L and 2.6 mmol/L respectively, which are lower than that of arbutin (IC50 = 5.3 mmol/L for diphenol-oxidation activity). The presence of 4-hydroxy-3-methoxybenzoic acid also prolongs the lag period in oxidation of L-tyrosine via tyrosinase — A 4.7-minute lagging was observed in the presence of 4 mmol/L 4-hydroxy-3- methoxybenzoic acid, compared to a 1.1-minute lagging in the absence of inhibitor. The inhibition kinetics analyzed by Lineweaver-Burk plots found 4-hydroxy-3- methoxybenzoic acid to be a mixed-type inhibitor for the oxidation of L-DOPA, the equilibrium constants for inhibitor binding with free enzyme, KI , and with enzyme-substract complex, ＫIS, were 1.76 mmol/L and 8.57mmol/L respectively.
The Study of HEPA/ULPA Filter Efficiency Certification with Properties of Semiconductor Materials in Semiconductor Industry
Authors: Chiu Yi Jui , Yang Chia Hao , Chang Luh Maan , Leong Khai Shoon
Published: March 2013

This paper aims to develop in the semiconductor plant molecular filtration efficiency with properties of semiconductor materials in the real-time. The goal of the assessment is to propose a new device based on the technologies assessed. First, the Scanning Mobility Particle Sizer Spectrometer with CPC (SMPS+C), a description of how each counter works is given. Second, a new experiment method for HEPA/ULPA filter efficiency certification in the real-time in semiconductor industry is developed. The experimental results showed that the performance of capillary had been installed and cleaned. The SMPS mean diameter fell within the range of the NIST standard. And, the HEPA/ULPA filter efficiency certification is explored. The best filtration efficiency particles size is 0.16μm. The results of this research provide the engineers with very useful information in semiconductor industry.
A Heat Sensitive Color-Developing Nanocapsule as Leucocompound Delivery Carrier
Authors: An Pu Ying , Yu Zhao Yun , Lu Shuang
Published: March 2013

A heat sensitive color-developing nanocapsule as leucocompound delivery carrier was prepared by emulsion polymerization. The nanocapsules were characterized by Malvern particle size analysis, scanning electron microscopy (SEM) and UV/visible spectrophotometer. The heat sensitive color-developing curves of absorbency at different temperature were investigated. The effects of core/wall mass ratio on the heat sensitive color-developing properties of nanocapsules were discussed in detail. The particle size analysis demonstrates that the particle sizes mostly concentrate between 124 nm and 312 nm. SEM result shows that the nanocapsules have smooth surface. The resultant nanocapsules have the highest heat sensitive color-developing absorbency with the the core/wall mass ratio being 1:8.
Electrochemical Properties of LiFePO4/C Composite by Spray-Drying Method
Authors: Gu Yi Jie , Hao Fei Xiang , Chen Yun Bo , Liu Hong Quan , Wang Yan Min , Liu Peng , Zhang Qing Gang , Li Shu Qi
Published: March 2013

LiFePO4/C composite cathode materials were synthesized by spray-drying method using LiH2PO4 and Fe2O3 as raw materials and amylum as conductive additive and reducing agent. The microstructure of the samples was characterized by X-ray diffraction; charge/discharge cycling performance and electrochemical impedance spectroscopy (EIS) were used to characterize their electrochemical properties. X-ray diffraction result showed that LiFePO4/C composite has an order olivine structure with space group of Pnma. The charge/discharge tests showed that the cathode material has a high discharge capacity of 140.8mAh/g after 5 cycles at 0.1C rate. And after 100 cycles at 1C rate, the discharge capacity is 108.4mAh/g.
Stability Control and Simulation of Wheel-Legged Mobile Robot in Mechanical Engineering
Authors: Sun Ling Yu , Zhang Jian Hua , Zhang Xiao Jun
Published: March 2013

The wheel-legged mobile robot in a complex three-dimensional environment has strong through capacity .Study is very critical for the stability of the control of their body systems. In this paper , based on analysis of the structure of wheel-legged mobile robot designed, the stability is evaluated by the use of (Effective Mass Center) EMC , and the stability domain is established accordingly. A fuzzy adaptive PID control method is created , and verified by ADAMS and MATLAB co-simulation . Simulation results show that the robot in different terrestrial environment, can maintain good stability.
Study on Local Strain Field Intensity Approach for Prediction Fatigue Life of Crankshaft Based on Mechanical Mechanics
Authors: Bao Ke , Wang Qiu Fang , Liu Shu Lin , Wei Zhong Liang
Published: March 2013

The bending fatigue limit moment and crack initiation life of 4105 crankishaft in five groups of bending moments are obtained by resonant bending fatigue tests first. Then, the static finite element calculation using sub-model is performed to get the strain distributions in every test load. The results show that in the region where stress concentrate, the strain field could be seen as plane strain state. So two dimensional strain field intensity model is selected. In order to remove the influences of size and surface conditions, the radius of strain field is determined with the strain distribution under the low-life test load. After that, the local strain field intensities under each test load are calculated with the radius of strain field. Finally, the strain-life curve of material is modified by the fatigue intensity limit of crankshaft, and the predicted life agree with the test results.
Analysis and Study for Plate Heat Exchanger Based on FLUENT Soft
Authors: Guo Zhi Ping , Zhou Peng Fei , Bai Li Li , Yang Jin Zhong , Meng Yu Gang , Du Yi Gang
Published: March 2013

The new plate heat exchanger with modular design is easy to realize the large-scale. It also has the performance advantage of low pressure drop and anticorrosion. The oil refining, chemical industry, steel and iron, metallurgy, electric power industries will be the future main application of it. According to FLUENT soft, this paper constructs the simulation model of the flat type air heat exchanger reverse-flow unit and cross-flow unit. And it also simulates the actual working conditions for the two units based on the existing data. Then we can get the interrelation of temperature field, stress field and velocity field during the using progress. So it can provide some evidences for analyzing heat transfer and resistance properties of the flat type air heat exchanger
The Design of Plate Heat Exchanger Prototype Test Bench Based on Similarity Theory
Authors: Zhou Peng Fei , Guo Zhi Ping , Bai Li Li , Yang Jin Zhong , Meng Yu Gang , Hao Jian Mei
Published: March 2013

The new plate heat exchanger with modular design is easy to realize the large-scale. It also has the performance advantage of low pressure drop and anticorrosion. The oil refining, chemical industry, steel and iron, metallurgy, electric power industries will be the future main application of it. But the designed engine for product is too big, the production cost is high, the production time is long, and it does not suit for processing experiment. Based on the above product structure and similarity theory, the paper designs another small type of reflux plate heat exchanger and the corresponding bench for testing.
Study of Adaptive Control System of Magneto-Rheological Fluid Dampers with Mechanical Properties Subject to Impact Loading
Authors: Zhang Li Jie , Sun Xiao Lao , Wang Jiong
Published: March 2013

In recoil mechanisms applications, the adjustability of Magnetorheological (MR) damper is desired to be used to provide the optimal damping force. In this paper, the adaptive control system of MR dampers subject to impact loading was studied. Genaral design scheme of the MR recoil damping control system was promoted to achieve good recoil dynamics. For adaptive control, an expected referrence model with better performance was induced and the controller parameters was able to be adjusted realtime by adaptive laws, which were deduced based on Lyapunov stability theory and excuted by the adaptive machine. Finally experimental verifications were done with comparison of three control methods: PI control, adaptive control and the fixed current. The results indicated that, of the three control methods, the adaptive control were the most effective
The Study on Mold Design System in Mechanical Engineering
Authors: Liu Xue Peng , Zhao Dong Mei
Published: March 2013

By investigating the characteristics of mold design in mechanical engineering, a framework of computer aided design tool is designed. A standard part library based on Client/Server mode and management tools are designed. The system improves the intelligence by introducing case-based design method
Role of Sm3+ Addition on Humidity Sensing of Nanocrystallite Mg-Cd Ferrites
Authors: Ashok Gadkari B. , Tukaram Shinde J. , Pramod Vasambekar N.
Published: March 2013

Nanocrystallite powders of 5 wt% Sm3+ added Mg-Cd ferrite samples were prepared by oxalate co-precipitation method. XRD, SEM and FT-IR techniques were used for characterization of the samples. The XRD reveals cubic spinel nature with secondary phase (SmFeO3). The crystallite size lies in the range of 28.69 to 32.66 nm. All the Sm3+ ions added samples are humidity sensitive at low humidity range 40 to70 %RH. The electrical resistivity of Sm3+ ions added samples decreased by four orders of magnitude, when %RH increased from 40%RH to 90 %RH. The response and recovery time of all the samples are 160-290 sec. The shorter response time was observed for Sm3+ added Cd ferrite sensor.
LTSA Algorithm for Dimension Reduction of Microarray Data
Authors: Chen Xiao Zhou
Published: March 2013

Dimension reduction is an important issue to understand microarray data. In this study, we proposed a efficient approach for dimensionality reduction of microarray data. Our method allows to apply the manifold learning algorithm to analyses dimensionality reduction of microarray data. The intra-/inter-category distances were used as the criteria to quantitatively evaluate the effects of data dimensionality reduction. Colon cancer and leukaemia gene expression datasets are selected for our investigation. When the neighborhood parameter was effectivly set, all the intrinsic dimension numbers of data sets were low. Therefore, manifold learning is used to study microarray data in the low-dimensional projection space. Our results indicate that Manifold learning method possesses better effects than the linear methods in analysis of microarray data, which is suitable for clinical diagnosis and other medical applications.
Research on the Maintenance and Protection of the Inclinometer and Inclinometer Tube in Foundation Ditch Monitoring
Authors: Zhao Lei , Feng Qian , Chen Jing Xi , Zhu Nian
Published: March 2013

This paper begins with a brief introduction of the installation method of the inclinometer tube and some related problems. And then the basic principle of the inclinometer is described. Afterwards, methods for the maintenance and protection of the inclinometer tube and the inclinometer in practical application are discussed according to engineering projects of foundation ditch monitoring. Finally, some solutions and advices on this issue are proposed. Nowadays, the cutting depth of foundation ditch is on the increase. And more and more foundation ditches are located on districts with dense ground facilities. Influenced by the nature of underground soil, loading conditions, construction techniques and many other factors, a foundation ditch may collapse and it may lead to cracks or even collapse of the surrounding buildings. So it is important to use precise inclinometers and carry out maintenance on them to eliminate safety hazards. The inclinometer technology is supposed to get a general understanding of the deformation characteristics and the deformation shape of the slope by monitoring the offset of the foundation ditch soil relative to the original condition. And based on this, displacement at different depths of the soil can be calculated, and it can be monitored whether the soil will lose stability. Thus, we can guide the construction more scientifically, reasonably and safely.
The Application of Alterable Parameter Genetic Algorithm and Neural Network in Artillery Locating Radar Detecting Small Signal
Authors: Tan Shang Guo , Hou Rui Dong , Pan Wei
Published: March 2013

To perform effective radar small signal detection in low SNR, a signal-processing model is established. In the model, the feature factors that distinguish small signal from noise are defined with whitening process and feature decomposition frequency estimation, then the RBF parameters are optimized by using genetic algorithm and APGA-RBF neural network is formed to realize classification, thereby the small signal detection is completed. Results of simulation show that the detection probability is greatly increased as well as the performance of classification.
Harmonic Impact on the Energy Meter
Authors: Han Bing , Feng Hao , Liu Yuan Yuan , Han Feng
Published: March 2013

A large number of harmonics generated by nonlinear loads injected into the grid will make the power system voltage and current waveforms produce a serious distortion, in turn impact on the measuring instrument. Harmonic generation because and it’s impact on induction watt-hour meter are introduced in this paper, the measurement error on the induction meter is analized, and methods and countermeasures to reduce the induction meter power measurement error are proposed.
On the Shortest and Conflict-Free Path Planning of Multi-AGV System Based on Dijkstra Algorithm and the Dynamic Time-Window Method
Authors: Chen Tian Jian , Sun Yuan , Dai Wei , Tao Wen , Liu Shuai
Published: March 2013

This paper presents a dynamic routing method for shortest path planning and conflict prevention of AGV system, and then illustrates the principle and implementation of this method. It gives a way to schedule a shortest and conflict-free route by utilizing Dijkstra algorithm and the Dynamic Time-Window Method, and comes to the conclusion by experiments that the combination of these algorithms will solve the routing problem of small-sized multi-AGV system to a large extent.
A Fast Approach for Reduction of Torque Ripple on BLDC Motor
Authors: Mi Chao , Liu Hai Wei , Zhao Ning , Shen Yang
Published: March 2013

This paper represents a fast approach for reduction of torque ripple on brushless DC (BLDC) motor. From a classic motor model, a mathematics component of torque ripple is extracted. To reduce the ripple component, a small modification of PWM and an open-loop control algorithm are made in the inverter of BLDC motor. At last, our paper describes and analyzes the simulation results of this approach by using PSIM. Without any sensors or advanced controllers, this approach can work in most BLDC motor drivers just after software update.
Influence of Chamfer Size on the Two-Side Direction Burr Formed in Grinding-Hardening Machine
Authors: Liu Ju Dong , Yuan Wei , Xiong Jin Kui , Xu Zhi Long
Published: March 2013

Based on the orthogonal experiment, this paper studied the influences of chamfer size on the two-side direction burr in grinding-hardening machine. The results show that: chamfer height size affected the two-side direction burr’s size significantly and the influence of chamfer degree α is general. On this experimental condition, it should adopted grinding parameter ap＝0.2mm,vw＝0.2m/min, the chamfer height h=1.0mm and chamfer degree α=20 o to reduce the two-side direction burr’s size effectively and decrease the workload of removing burr.
Numerical Investigation on Improvement of Flow Field Structure in Large Quench Tank
Authors: Sun Hui
Published: March 2013

According to the major design deficiency of the existing tank, the computational fluid dynamics (CFD) technique is adopted to simulate the flow field in the large quench tank, and two optimum schemes are brought forward. Further more, the influence of different mixer systems on the flow field in the large quench tank is analyzed. Simulation Results show that the non-uniform flow field is generated throughout the quenching zone in the existing large quench tank, and the flow rate of the quenchant is rather low, which may lead to the workpiece insufficient and non-uniform cooling rate. Setting an inner core in the center zone of the tank increases the flow rate in the region near the inner surface of workpiece. Using the submersible impellers, the flow of the quenchant in the region near the outer surface of workpiece significantly strengthened. There is parallel relation between the flux of the inner core and that of the submersible impeller.
Effect of N and P codoping on ZnO properties
Authors: Wang Jin Zhong , Elamurugu Elangovan , Li Hong Tao , Jiao Shu Jie , Zhao Lian Cheng , Martins Rodrigo , Fortunato Elvira
Published: March 2013

Nitrogen and Phosphorus co-doped (N+P)- zinc oxide (ZnO) films were RF sputtered on corning glass substrates at 350 °C and comparatively studied with undoped, N-, and P- doped ZnO. X-ray diffraction spectra confirmed that the ZnO structure with a preferred orientation along direction. Scanning electron microscope analysis showed different microstructure for the N+P co-doping, and thus probably confirming the co-existence of both the dopants. X-ray photoelectron spectroscopy spectra revealed that the chemical composition in N+P co-doped ZnO are different from that found in undoped, N-, and P- doped ZnO. The atomic ratio of N and P in N+P co-doped ZnO is higher than that in single N or P doped ZnO. One broad ZnO emission peak around 420 nm is observed in photoluminescence spectra. The relative intensity of the strongest peak obtained from co-doped ZnO films is about twice than the P- doped and thrice than the pure and N- doped films.
Synthesis of PMMA by Single-Electron Transfer Radical Polymerization Using Benzyl Chloride as Initiator
Authors: Fu Chang Qing , Wei Xiao Bo , Shen Liang
Published: March 2013

Single electron transfer living radical polymerization (SET-LRP) has developed to be a robust tool for the construction of well-designed polymers. This paper reports the influence of one cheaper initiator on the SET-LRP process. The SET-LRP of methyl methacrylate (MMA) initiated with benzyl chloride and catalyzed by Cu(0)/PMDETA at 25°C in methanol is described. The polymerization kinetics was recorded. The reactions followed first-order kinetic in monomer consumption and the molecular weights increased linearly with conversion while retaining narrow molecular weight distribution. Therefore, it is plausible that SET-LRP of MMA initiated with benzyl chloride process to yield well defined macromolecules.
Configuration Evaluation of Printing Machine Based on Intuitionistic Fuzzy Entropy and TOPSIS
Authors: Pu Hong Bin , Zeng Xi Nan , Li Wei Guang
Published: March 2013

Servo system plays a critical role in printing and die-cutting machinery of corrugated board (PDCMCB) with electronic line-shafting, and the configuration of servo can contribute to the performance of PDCMCB with electronic line-shafting. The paper presented the evaluation approach of servo configuration with intuitionistic fuzzy set (IFS), intuitionistic fuzzy entropy (IFE ) and technique for order preference by similarity to ideal solution (TOPSIS) to improve the effectiveness and objectivity of servo configuration evaluation of PDCMCB. IFS and IFE were used to obtain criteria weights integrating with maximal deviation entropy model, and TOPSIS was performed to calculate the final ranking order of servo configuration of PDCMCB with electronic line-shafting. Finally, an example was used to illustrate the proposed method of configuration evaluation and the results indicated the proposed approach could effectively perform servo configuration evaluation for PDCMCB.
Deterministic Single InGaN Quantum Dots grown on GaN Micro-Pyramid Arrays
Authors: Holtz Per Olof , Hsu Chih Wei , Lundskog Anders , Karlsson K. Fredrik , Forsberg Urban , Janzén Erik
Published: March 2013

InGaN quantum dots (QDs) formed on top of GaN pyramids have been fabricated by means of selective area growth employing hot wall MOCVD. Upon regrowth of a patterned substrate, the growth will solely occur in the holes, which evolve into epitaxially grown wurtzite based pyramids. These pyramids are subsequently overgrown by a thin optically active InGaN well. The QDs are preferably nucleating at the apices of the pyramids as evidenced by the transmission electron microscopy (TEM). The emission from these QDs have been monitored by means of microphotoluminescence (μPL), in which single emission lines have been detected with a sub-meV line width. The μPL measurements undoubtedly reveal that the QDs are located in the apexes of the pyramids, since the sharp emission peaks can only be monitored as the excitation laser is focused on the apices in the µPL. It is also demonstrated that the emission energy can be changed in a controlled way by altering the growth conditions, like the growth temperature and/or composition, for the InGaN layers. The tip of the GaN pyramid is on the nm scale and can be made sharp or slightly truncated. TEM analysis combined with µPL results strongly indicate that the Stranski-Krastanow growth modepreferably is taking place at the microscopic c-plane truncation of the GaN pyramid. Single emission lines with a high degree of polarization is a common feature observed for individual QDs. This emission remains unchanged with increasing the excitation power and sample temperature. An in-plane elongated QD forming a shallow potential with an equal number of electrons and holes is proposed to explain the observed characteristics of merely a single exciton emission with a high degree of polarization.
Influence of Magnetoelastic Anisotropy on Properties of Nanostructured Microwires
Authors: Zhukov Arcady , Churyukanova Margarita , Gonzalez-Legarreta Lorena , Talaat Ahmed , Zhukova Valentina , Hernando Blanca , Ilyn Maxim , González Julian , Kaloshkin Sergei
Published: March 2013

We studied the effect ofthe magnetoelastic ansitropy on properties of nanostructured glass-coated microwires with soft magnetic behaviour (Finemet-type microwires of Fe70.8Cu1Nb3.1Si14.5B10.6, Fe71.8Cu1Nb3.1Si15B9.1 and Fe73.8Cu1Nb3.1Si13B9.1 compositions) and with granular structure (Cu based Co-Cu microwires). The magnetoelastic energy originated from the difference in thermal expansion coefficients of the glass and metallic alloy during the microwires fabrication, affected the hysteresis loops, coercivity and heat capacity of Finemet-type microwires. Hysteresis loops of all as-prepared microwires showed rectangular shape, typical for Fe-rich microwires. As expected, coercivity, HC, of as-prepared microwires increases with decreasing of the ratio ρ defined as the ratio between the metallic nucleus diameter, d to total microwire diameter, D. On the other hand we observed change of heat capacity in microwires with different ratio ρ. In the case of Co-Cu microwires ρ- ratio affected the structure and the giant magneto-resistance of obtained microwires.
Optimal Processing for Hydrophobic Nanopillar Polymer Surfaces Using Nanoporous Alumina Template
Authors: Chiu Chui Yu , Lin Yi , Tseng Yu Chi , Shen Yung Kang
Published: March 2013

Nanoporous anodic aluminum oxide (AAO) templates are fabricated using an anodization method. The mean diameters of nanoporous anodic aluminum oxide templates are 100 nm and 200 nm by various processing parameters of the anodization method. A molded plastic thin film nanostructure is fabricated by nanoimprinting using the AAO template as a mold. The surface properties of the molded plastic thin film are discussed using various nanoimprinting process parameters. Contact angles of the molded plastic thin film with the nanostructure exceed those without the nanostructure. The molded plastic thin films with a nanostructure and a hydrophobic surface are formed, and their contact angles exceed 90°.
The Influence of Different Concentration of Glucose on the Growth of Recombinant E.coli and Plasmid Stability
Authors: Xu Ying Qian , Liu Chun Yuan , Cai Feng Ju , Hu Jun Yi
Published: March 2013

In this paper, the plasmid stability and the concentration of recombinant E.coli DH5α were investigated by adding glucose of different concentration at the beginning of fermentation. The result shows that glucose was good for the growth of recombinant E.coli DH5α and the stability of plasmid. The optimal concentration of glucose was 1g/L. The biomass concentration could be up to110.930g/L and the fraction of plasmid-carrying cell was about 99% in the optimized culture medium.
A Preliminary Study on the Phototaxis of Horse Mackerel (Trachurus japonicas) and Amberfish (Decapterus maruadsi)
Authors: Chen Qing Xiang , Xiong Zheng Ye , Shi Wen Qing , Peng Jing Yun
Published: March 2013

In order to provide some useful suggestions for the development of selective light fishing techniques, fishing experiments with two sets of Light Emission Diode (LED) lamps were carried out in China coastal waters. Amberfish (Decapterus maruadsi) and Horse Mackerel (Trachurus japonicas) catches of white and blue LED lamps were analyzed, t-test analysis of the catches’ data confirmed that the white light LED lamp is significantly better than the blue light LED lamp for catching amber fish and Horse Mackerel. The reasons for the differences of catches were also given in the paper.
Analysis of Synonymous Codon Usage in the US2 Gene of Duck Plague Virus
Authors: Gao Jie , Cheng An Chun , Wang Ming Shu
Published: March 2013

The codon usage bias of DPV-CHv US2 gene (GenBank Accession No. EU195086) will be analysed in this study, and a comparative analysis of DPV-CHv US2 gene and those of other 15 alphaherpesvirus US2 genes was performed. We also analysed the RSCU, ENC, GC3s value of those US2 genes in herpesvirus, some data were analysed specifically in the article. Consequently, we found that the eukaryotic expression system——the yeast is more suitable for the expression of DPV US2 gene.
Optimum Material Gradient for Functionally Graded Dental Implant Using Particle Swarm Optimization
Authors: Sadollah Ali , Bahreininejad Ardeshir , Eskandar Hadi , Hamdi Mohd
Published: March 2013

One of the main issues facing dental implantation, which makes osseointegration and bone remodeling problematical, is a mismatch of mechanical properties between engineered and native biomaterials. Functionally Graded Materials (FGMs) has been proposed as a potential alternative to some conventional implant materials such as titanium for selection in prosthetic dentistry. The idea of FGM dental implant is that the property would vary in a certain pattern to match the biomechanical characteristics required at different regions in the hosting bone. This research presents some important findings for the FGM dental implant design in optimization of material gradient. Due to the nature of the problem, multi-objective optimization methods should apply for solving multi-criteria problems. The Pareto front was determined using the Multi-Objective Particle Swarm Optimization (MOPSO). The obtained results from the MOPSO confirm the results obtained by the Response Surface Methodology (RSM) in addition to offering further improvements.
Bioinformatic Analysis of the 3D Polyprotein from Duck Hepatitis A Virus Strain H Isolated in China
Authors: Cao Qian Da , Cheng An Chun , Wang Ming Shu
Published: March 2013

Great loss has been caused by Duck viral Hepatitis on waterfowl industry within the scope of world. But the information about the causative virus is limited and even less about the 3D gene. 3D gene is an important gene in virus life cycle, its encoding protein participates in the whole procedure of virus RNA replication. Generally, bioinformatics analysis plays an important role in studying genes and proteins. To better understand the encoding protein of 3D gene and get more information about the virus, here in this article we intend to provide some new information about the encoding protein of 3D gene from H strain of duck hepatitis virus type A for further research.
Numerical Investigation of the Flow Characteristics Considering the Human Workloads in a Human Airway
Authors: Sung Kun Hyuk , Ryou Hong Sun
Published: March 2013

The flow characteristicscan be sensitively changed by the respiration flow rate due to the complex geometries, e.g., bends, constrictions in a human airway. Also, caused by the switching the flow direction, the disturbance destabilizes the flow when a human breathes. Thus, the real breathing conditions, e.g., peak flow rate and the breath cycle time related to workload, should be considered to investigate on the flow characteristics in a human airway. In this study, realated to the human workloads, the effect of the change of the respiratory flow rate on the flow characteristics is investigated with the numerical method at the 4-specific normalized times in a breath cycle. In almost time of a breath cycle, as the workload increases, the flow recirculation zone decreases slightly because the energy transport toward the wall increases due to the turbulence fluctuation and the secondary motion.However, when the flow acclecrates in the expiratory phase, the flow recirculation zone increases because of the unsteady effect and the glottal jet. Thus, respiratory flow rate considering the human workloads and the unsteady effect caused by the real respiration should be considered to investigate the flow characteristics and the particle movement in a human airway.
Erythropoietin Gene Expression in the Stromal Cell Increased by Silica to Induce Erythrocyte Differentiation
Authors: Liu Wei Chung , Tsai Chang Shu , Chen Ya Yun , Keng Nien Tzu
Published: March 2013

Silica containing materials are often applied in bone tissue engineering, which may contact with bone marrow cells. However, the biological effects have not always been observed in studies of bone marrow cells exposed to silica. In this experiment, the relevant biological effects were evaluated. Bone marrow cells and stromal cells treated with silica particles (0.5-10 μm) were applied to investigate the possible interaction mechanism. HEL-92 cells were culture with the condition medium of stromal cells treated with or without silica particles. The erythrogenesis of bone marrow cells treated with silica particles was increased significantly. The expression level of glycophorin A the erythroid marker in HEL-92 cells treated by condition medium was higher than control group. The silica particles could also up-regulate the erythropoietin gene expression of stromal cells. The results indicate that bone marrow cells can be stimulated by silica particles to differentiate into erythrocytes. Our results suggest that silica particles can stimulate bone marrow cells to differentiate erythrocytes possibly via enhancing gene expression of erythropoietin.