bluuebunny/crossref_metadata_2025 huggingface dataset:
Use of 99mTc-HMPAO in Evaluating the Results of Cerebral Hypoperfusion Prevention in the Patients with Coronary Heart Disease after Coronary Artery Bypass Grafting
Authors: Efimova Nataliya Yu. , Chernov Vladimir I. , Efimova Irina Yu. , Akhmedov Shamil D. , Lishmanov Yuri B.
Published: January 2015

The purpose of this study is to research the use of the radiopharmaceutical99mTc-HMPAO in the evaluation of drug prevention of cerebral complications in patients with coronary heart disease after coronary artery bypass grafting (CABG) performed with cardiopulmonary bypass (CPB). The study included 30 patients, in whom surgical revascularization was performed with CPB. 11 patients in this group were prescribed instenon. All the patients underwent brain tomoscintigraphy with99mTc-HMPAO and neuropsychological testing before CABG and 10-15 days after it. The results showed that99mTc-HMPAO is useful radiopharmaceutical for evaluation of cerebral complications in patients after CABG. Thus, coronary artery bypass grafting using CPB can be complicated by the deterioration of cerebral perfusion and cognitive dysfunction, while preventive medication with instenon can prevent or significantly reduce the violations of cerebral hemodynamics and neuropsychological status of the patients.
Use of Technetium-99m-Labeled Lipophilic Complex of Methoxy-Isobutyl-Isonitrile and Iopromide Radiopaque Substance to Assess the Severity of Coronary Atherosclerosis in Patients with Coronary Heart Disease at Mild Disorders of Myocardial Perfusion
Authors: Zavadovsky Konstantin V. , Gulya Marina O. , Lishmanov Yuriy B. , Verkhoturova Vera V.
Published: January 2015

In this study we used technetium-99m-labeled lipophilic complex of methoxy-isobutyl-isonitrile (99mTc-MIBI) and iopromide to assess coronary atherosclerosis in patients with coronary artery disease (CAD). The study included 33 patients with CAD who underwent myocardial perfusion scintigraphy with 99mTc-MIBI and computed tomography angiography (MDCTA) with iopromide. Patients who have comparable with the population-wide level risk of coronary events are characterized by the presence of borderline and significant stenosis 83% and 86%, respectively. 99mTc-MIBI and iopromide can be used to assess the severity of coronary atherosclerosis in patients with CAD.
Use of Technetium-99m-Labeled Methoxy-Isobutyl Isonitrile and Iodine 123-Labeled Phenyl-Methyl-Pentadecanoic Acid in the Diagnosis and Prognosis of Patients with Dilated Cardiomyopathy
Authors: Lishmanov Yuri B. , Zavadovsky Konstantin V. , Gulya Marina O. , Minin Stanislav M. , Lebedev Denis I.
Published: January 2015

The objectiveof this study is to assess perfusion and metabolic state of the left ventricular in patients with dilated cardiomyopathy (DCM) using scintigraphy with MIBI and BMIPP, as well as to develop the predictors of efficacy of cardiac resynchronization therapy (CRT). The study included 51 patients with DCM who underwent CRT. Correlation between the values of LV ESV after CRT and preoperative perfusion and metabolic defects sizes was detected. "Responders" and "non-responders" groups were significantly different from the perfusion and metabolic defects sizes. Myocardial perfusion-metabolic scintigraphy can be used as additional criteria for the selection of patients for CRT.
Using Nanotech Radiopharmaceutical for the Visualization of Sentinel Lymph Nodes in Patients with Cervical Cancer
Authors: Sinilkin Ivan , Chernov Vladimir , Chernishova Alena , Kolomiets Larisa , Titskaya Anna , Zelchan Roman
Published: January 2015

The study of radionuclide determination of SLN and optimization of surgical treatment in organ-sparing treatment of invasive cervical cancer included 26 patients with cervical cancer of stage I. To identify sentinel lymph nodes a nanocolloid was administered one day prior to the planned operation. Sentinel lymph nodes were identified in 26 patients. A comparative evaluation of the sensitivity of techniques for determining SLN, depending on the method, has showed that the SPECT sensitivity was 72%, with radiometry this indicator was 93.3%. The technique of intraoperative radiometric determination of SLN is more efficient in comparison with SPECT. The optimum is the combined use of both techniques, when the probability of SLN detection increases to 91.4%.
Using Nanotech Radiopharmaceutical for the Visualization of Sentinel Lymph Nodes in Patients with Larynx and Hypopharynx Cancer
Authors: Sinilkin Ivan , Chernov Vladimir , Choynzonov Evgeny T. , Chijevskaya Svetlana , Titskaya Anna , Zelchan Roman
Published: January 2015

The study included 17 patients. All patients with cancer of larynx and hypopharynx were injected with nanocolloid labeled with 99mTc. In total 22 lymph nodes are identified. In the study of distant sentinel lymph nodes the presence of metastatic disease was revealed in 2 patients (11.8%). In 15 patients (88.2%) there was no metastatic lesion of SLN, and nodal disease progression was not recorded during further observation. Thus, in our study we did not observe the phenomenon of the so-called "jumping" metastases. Single-photon emission computed tomography and intraoperative radiometric display allow determining the “sentinel” lymph nodes after subserous administration of radioactive colloid with a sensitivity of 100% and a specificity of 100%.
Polimer Gafchromic EBT3 Films in Clinical Dosimetry
Authors: Sukhikh Evgeniia , Sukhikh Leonid , Malikov Evgeniy
Published: January 2015

The results of the calibration of the Gafchromic EBT3 polymer film for photon and electron beams with different energies are presented. The results of these studies show that the use of film dosimetry for electron and photon beams in the dose range 0.2 - 40 Gy is possible. The resulting calibration curves are the same for electrons with different energies (2 MeV, 10 MeV), but there exists a difference for photons with the energy of 10 MV and 70 kV.
Technology of Synthesis of Opal Matrix Metamaterials
Authors: Bagdasarian Alexander , Samoylovich Mikhail , Mkrtchyan Alpik , Rinkevich Anatoly , Belyanin Alexey , Bagdasarian Sergey , Mkrtchyan Artak , Afanasieva Anastasia
Published: January 2015

This work describes the technology of growing crystal metamaterials spinel ferrites. Metamaterials is one of the most promising classes of materials for use in optical devices in the microwave range and features, which can be used for creation of controlled attenuators, phase shifters, and other devices.
Preparation Technique of Technetium-99m-Labeled Nanoparticles of Fe@C with Modified Surface
Authors: Skuridin Viktor S. , Stasyuk Elena S. , Rogov Alexander S. , Varlamova Natalya V. , Nesterov Evgeny A. , Sadkin Vladimir L. , Postnikov Pavel S.
Published: January 2015

The authors have researched the possibility of radioactive 99mTc labeling of the surface of carbon-coated nano-sized ferrum Fe@C particles as well as Fe@C (IDA) particles modified by aryldiazonium tosilates. Non-modified particles proved to absorb up to 11.2 % of 99mТс injected amount. The value of atomic absorption does not exceed 0.736∙10-9 g-at 99mТс per 1 g of Fe@C. No physical absorption is observed on modified particles of Fe@C (IDA). In chemical interaction of the particles with 99mTc in the presence of a reducing agent, Sn (II), the yield of the labeled product increases 1.5 times and reaches 21.3% of the total induced radioactivity of the radionuclide.
Thermal Desorption of Iodine-123 from Tellurium-122 Oxide Irradiated by Deuterons
Authors: Skuridin Viktor S. , Garapatski Alexander , Slamkulov Ilyas , Semenov Aleksey , Ermakova Yanina
Published: January 2015

The paper studies the iodine-123 extraction process from the targets of enriched Tellurium-122 irradiated by deuterons at the cyclotron R-7M. We researched the regularities of radionuclide accumulation in the absorbent solution tank, depending on the temperature and air pumping regime through the system. As a result, we suggested a separate temperature treatment of the targets with the purpose of their preliminary purification from impurities and subsequent obtaining of "Na123I" preparation with radiochemical yield 97%.
Closed Loop Identification by Optimization Method
Authors: Dyadik Valeriy F. , Krinitsyn Nikolay S. , Rudnev Vyacheslav A.
Published: January 2015

The article is devoted to the adaptation of the controller parameters during its operation as a part of a control loop. The possibility to identify the parameters of the controlled plant model in the closed control loop has been proved by a computer simulation. The described active identification method is based on the response processing of the closed loop control system to standard actions. The developed algorithm has been applied to determine the model parameters of the flaming fluorination reactor used for the production of uranium hexafluoride. Designed identification method improves the quality of the product and the efficiency of the entire production.
Computer Simulator of Separation Production
Authors: Orlov Aleksey A. , Timchenko Sergey N. , Sidorenko Vladimir S.
Published: January 2015

The article describes the structure, architecture, principles of construction and operating modes of the computer software that simulates operators' workplaces of centrifuge uranium enrichment production. We have implemented the networking of computer simulator modules and equipment database. A computer simulator of the isotope separation plant of Siberian Chemical Plant OJSC has been created on the basis of the architecture developed. The main purpose of the simulator is to train the operating personnel for production process control in standard and emergency situations.
Development and Creation of Software and Information Environment for Simulation of Nuclear Facility
Authors: Godovykh Alexey , Stepanov Boris
Published: January 2015

The article discusses the main issues related to the training and retraining of security services as well as those related to the design, implementation and evaluation of physical protection systems (PPS). The emphasis is on modeling the protected object and creating a "program-information environment" for the construction and evaluation of the main PPS parameters. The paper also presents the main PIE blocks.
UHF-Properties of Nanocomposites: Magnetic Resonance
Authors: Bagdasarian Alexander , Samoylovich Mikhail , Mkrtchyan Alpik , Rinkevich Anatoly , Belyanin Alexey , Bagdasarian Sergey , Mkrtchyan Artak , Vasilevskaya Natalia
Published: January 2015

This work presents the results of studies of electromagnetic properties of nanocomposites based on opal matrices in the millimeter wavelength range. It is shown that the application of an external magnetic field changes the transmission and reflection coefficients. Magnetic resonance was studied in nanocomposite particles of spinel ferrites or metals. Magnetic resonance spectra were restored. We considered the parameters of nanocomposites required for using in microwave devices.
Mathematic Simulation of Crystallization Refining Process of Spent Nuclear Fuel Reprocessing Desired Products in Linear Crystallizer
Authors: Veselov Sergey , Volk Vladimir , Kasheev Vladimir , Podimova Tatiana , Posenitskiy Evgeny
Published: January 2015

The object of research is crystallization refining process of uranyl nitrate (UN) from nitric acid solution. The process of crystallization refining is a working operation which can provide effective extraction and purification of desired products (fission materials) during spent nuclear fuel (SNF) reprocessing. The purpose of the work is mathematical description of the linear continuous crystallizer operating modes using the example of uranyl nitrate hexahydrate crystals sorting. The mathematical model presented in the work allows describing changes of crystallization process parameters in the active volume of crystallizer and choosing the most effective operating modes in terms of extraction of SNF reprocessing desired products.
Mathematical Model of Non-Stationary Hydraulic Processes Occurring in Gas Centrifuges for Uranium Enrichment
Authors: Orlov Aleksey A. , Timchenko Sergey N. , Sidorenko Vladimir S.
Published: January 2015

In this article the mathematical model of non-stationary hydraulic processes occurring in gas centrifuge cascades for uranium enrichment is described. This model simulates the technological equipment behavior in standard and emergency situations for possible operational and disturbing influences. Also, the algorithm of differential equations system solving for this model is represented.
Performance Evaluation of Micro-CT Scanners as Visualization Systems
Authors: Batranin Andrey , Ivashkov Denis , Stuchebrov Sergei
Published: January 2015

High-resolution X-ray tomography, also known as micro-computed tomography (micro-CT) or microtomography, is a versatile evaluation technique, which extends application in various fields including material science. Micro-CT is a suitable method for quantitative and dimensional materials characterization. Needless to say, the accuracy of the method and applied equipments – micro-CT scanners – should be assessed to obtain reliable, solid results. In this paper, the performance of a micro-CT scanner as a visualization system is discussed. Quantitative parameters of image quality and visualization systems as well as methods to obtain their numerical values are briefly described. The results of experiments carried out on in-house made micro-CT scanner TOLMI-150-10 developed in Tomsk Polytechnic University are presented.
Radiation Burden Decline to the Objects in the X-Ray Investigation
Authors: Stuchebrov Sergei , Batranin Andrei , Krasnykh Angelina , Miloichikova Irina , Wagner Alexander
Published: January 2015

This paper presents the results of designing experimental setups for the X-ray visualization. The setups allow to obtain the projection of two-dimensional images and sinograms that are used to restore the tomographic cross-sections. The results of the computing of the dose burden are supplied. The low values of the equivalent doses, received in the experiment, are analyzed.
Simulation of the Uranium Crystallization Process Using Cellular Automata
Authors: Ochoa Bique Anton O. , Goryunov Alexey G.
Published: January 2015

This article is devoted to the simulation of the uranium crystallization process. Emphasis is placed on developing a mathematical model of the crystal growth using the cellular automata theory. It is used quantities such as dislocation density and crystal orientation as state variables. Cellular automata are defined on two-dimensional lattice. Physics of the process are taken into consideration in this approach. It is allowed setting complex boundary conditions, consider the complex phase transitions with intermediates, and hypothesize regarding phase’s formation and concentration and temperature fields distribution. Optimization of uranium crystallization process is accepted to get especially pure nuclear materials.
Bioindication of the Area of Heavy Metal Deposition for Point Sources of Pollution
Authors: Ryzhakova Nadezhda K. , Borisenko Alexey L. , Pokrovskaya Elena A. , Kabanov Denis V. , Babicheva Valentina O.
Published: January 2015

When assessing the environmental situation in territories, where industrial plants or combined heat and power stations (CHPs) are situated, a special interest is paid to determining the size of the area of heavy metal (HM) deposition, due to their high toxicity and ability to accumulate in human body. Over the last decade, the estimation of air heavy metal content widely implements the method of moss biomonitoring. This work analyses a three-year amount of moss growth. Sampling was carried out in the northeastern direction from CHP-5 (Novosibirsk, Russia) in accordance with the wind rose at distance varying from 1 to 5 km. The study includes preparation and analysis of 38 samples of moss by neutron activation method. The work is based on the measurement of the concentration of various heavy metals and frequency of wind occurrence in seven main directions.
Development of Impurities Determination Method in Isotopically Enriched Preparations
Authors: Skorikov A.I. , Baskov V.G. , Kidyamkin A.V. , Marochkina U.M. , Popovtsev E.E.
Published: January 2015

The method for Lu determination in Yb preparations enriched in 176Yb by atomic and emission spectrometry with inductively coupled plasma (AES-ICP) is reported. The relative determination error from 0.0001 to 0.1% of Lu mass is less than 40%.
Cluster Structure of Salt Solutions in Polar Dielectric Liquids
Authors: Shamanin Igor , Kazaryan Mishik , Sidko Dmitry
Published: January 2015

The aim of the study is to demonstrate that separation of solvated ions in solution of mixed salts under the action of external periodic electric field is caused by the formation of clusters consisting of solvent molecules and surrounding the ions. Such clusters have the dimensions of about 0.1 µm. The study includes the theoretical estimation of cluster dimensions and experimental determination of the external electric field frequency that gives rise to the separation of solvated ions. The results testify that placing the volume distributed electric charge of ion into dielectric liquid is accompanied by the formation of supramolecular particles. We called such particles “clusters”. The linear dimensions of clusters significantly exceed the first and the second radii of solvation (approximately 1 Angstrom) and amount to nearly 0.1 µm. At such sizes, inertial properties of clusters and their natural frequencies may allow controlling their movement by applying an external electric field to solution.
Molecular Dynamics Study on the Generation of Single-Walled Carbon Nanotubes Junction by Direct C60 Bombardment
Authors: Yang Xue Ming , Huang Yan Hui , Wang Long Jie
Published: January 2015

Carbon nanotubes have been considered as promising materials for applications of nanodevices. As building blocks, carbon nanotube junctions formed by carbon-carbon covalent bonds are desired nanostructures for carbon nanotube based materials, however the formation of the junctions made of C-C bonds is still quite challenging. In this paper, a molecular dynamics study on the generation of single-walled carbon nanotubes junction by direct C60bombardment is conducted. Results show that carbon nanotube junctions can be formed by direct C60bombardment, however the structure of the formed junction is similar as the riveted structure in some case and the C60bombardment may lead to uncontrollable bonding disorder in the joints.
Facile Synthesis and Photocatalytic Properities of PbS Quantum Dots/Boron and Nitrogen Co-Doped TiO2 Transparent Photocatalyst Emulsion
Authors: Wei Hai Ying , Bai Yun Ping , Zhang Hua Yan , Liu Ze Xin , Li Tian Tian , Niu Han Shuang , Li Ling , Zhang Wen Ming , Li Xiao Wei
Published: January 2015

PbS quantum dots/ Boron and Nitrogen co-doped TiO2 photocatalyst emulsions were synthesized by a complexation-controlled hydrolysis method at room temperature. Boron compounds and Nitrogen compounds were added to TiO2 precursor solution, and PbS quantum dots were attached to TiO2 particles surfaces by using chemical reaction. The hybird composite photocatalysts were characterized by nanoparticle size analyzer. Their photocatalytic properties were evaluated through the degradation of acid red 3R dye. The results indicate that when TiO2 emulsion added to Boron ions, Nitrogen ions, and PbS quantum dots, the reflux time is 15 min, the photocatalytic performance of the emulsion is the best.
Preparation and Characterization of Tetradecanol Microcapsule Phase Change Materials by Emulsion Polymerization
Authors: Song Xiao Qiu , Cao Long Di , Xu Dan Dan
Published: January 2015

In this study, it was aimed at preparing and characterizating of poly (methyl methacrylate) (PMMA) shell microcapsules containing tetradecanol as phase change materials (PCMs) for thermal energy storage. The tetradecanol microcapsules were characterized by using scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA). The test result show that the contents of tetradecanol in microcapsules nearly 57.5% and the latent heats of melting and freezing were found to be 120.7 and 118.4 J/g. TGA analyses also indicated that the microPCMs degraded in two steps and have good thermal stability.
Microstructure and Mechanical Properties of Tough Phase Layers of a NiCoCrAl/YSZ Multiscalar Microlaminate
Authors: Jiang Chun Yu , Tian Xiao Xiao , Shi Guo Dong
Published: January 2015

One multiscalar microlaminate comprising 66 thin strong layer stacks of NiCoCrAl / ZrO2-8wt.%Y2O3 (YSZ) and 5 thick tough phase layers of NiCoCrAl whose thicknesses ranged from 5μm to 25μm was fabricated by Electron Beam Physical Vapor Deposition (EB-PVD) and followed by hot pressing treatment. Scanning electron microscopy was used to characterize the microstructures and failure mode of the tough phase layers. Tensile tests and nanoindentation tests were performed to evaluate the mechanical properties of the tough phase layers. The influence of thicknesses of tough phase layers on their microstructure and mechanical properties was investigated. It was found that with the increasing thicknesses of the tough phase layers, their hardness decreased, but their plasticity increased. There was a critical thickness for the tough phase layers between 13μm and 20μm. The tough phase layers with thickness less than the critical value displayed the different microstructure and failure mode from those with thickness more than the critical value.
Extraction of SOD from Alfalfa with Ultrasonic Assisted
Authors: Qu Min , Liu Yu Jia , Qin Lin An
Published: January 2015

In this study, the new technological parameters have been optimized for running Single factor experiment and orthogonal design test. Furthermore, the optimal extractible condition of SOD activity from Alfalfa was determined by the assay of NBT photoreduction method. The results reveal that when the ratio of liquor to material is 1 to 10; pH value of phosphate buffer solution is 7.5; ultrasonic power is 400 w, therefore, the SOD activity of Alfalfa is up to 66.54 U/mL. In addition, we characterized the activity analysis of Alfalfa proteins using heat denaturation, ammonium sulfate precipitation and ultraviolet spectroscop. The results showed that the protein removal rate is approximate 91.70 % and SOD specific activity is 6.5 times. Based on the above results, we reached a preliminary estimate that the SOD from Alfalfa is a kind of Cu/Zn-SOD.
Study on Irradiation Cross-Linking Modification and Biodegradability of Poly (Butylene Succinate)
Authors: Liu Hui , Li Qiang , Chuai Cheng Zhi , Wang Zhe
Published: January 2015

The pure PBS material has been taken irradiation cross-linking modification in order to improve the melt strength of PBS. The mechanical properties, sanitation performance and biodegradable properties of the modified PBS were investigated. The results showed that the modified PBS has fine hygiene performance. The mechanical property increased, but it reduced rapidly after put into the specific soil. The weight loss rate of PBS reached 50.86% after degradation in humus for 56 days.
Corrosion Behaviors of Li-B-H Films in Air
Authors: Xiong Zheng Wei , Wu Wei Dong
Published: January 2015

In the present study, Li-B-H films contained LiBH4 and Li2B12H12 were fabricated under different hydrogen pressures (20, 70 Pa) at ambient temperature by pulsed laser deposition (PLD). The corrosion behaviors of the films were studied over a time of 1-24 h in the air at ambient temperature. Fourier transform infrared spectrometry (FT-IR), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) were used to analyze the formed oxidation film. The results indicated that an oxidation film with obvious cracks and holes were formed, which was composed by Li2B4O7 and Li2CO3. The films were mainly reacted with H2O and CO2, so the oxidation of Li-B-H could be prevented by avoiding exposed to air.
Low Adhesive Superhydrophobicity and Self-Cleaning Property of Moth Wing
Authors: Sun Gang , Fang Yan
Published: January 2015

The microstructure, hydrophobicity, adhesion, and chemical composition of moth wing surfaces were investigated by a scanning electron microscope (SEM), a contact angle (CA) meter, and a Fourier transform infrared spectrometer (FT-IR). Using ground calcium carbonate (heavy CaCO3) as contaminating particle, the self-cleaning performance of wing surface was evaluated. The self-cleaning mechanism was discussed from the perspective of biological coupling. The wing surfaces, composed of naturally hydrophobic material (chitin, protein, fat, etc.), possess complicated hierarchical micro/nano structures. According to the large CA (138.9~158.4°) and small sliding angle (SA, 1~3°) of water droplet, moth wing surface is of low adhesion and high hydrophobicity. The removal rate of contaminating particle from wing surface is averagely 83.8%. There is a good positive correlation (r=0.81) between particle removal rate and roughness index of wing surface. The coupling effect of material element and structural element leads to the remarkable hydrophobicity and self-cleaning property of the wing surface. Moth wing can be potentially used as a template for biomimetic design of functional material with complex wettability. This work may offer interesting inspirations for preparation of smart interfacial material.
Self-Cleaning Characteristic of the Insect (Lepidoptera) Wing Surfaces
Authors: Sun Gang , Fang Yan
Published: January 2015

The microstructure, hydrophobicity, adhesion and chemical composition of the butterfly and the moth wing surfaces were investigated by a scanning electron microscope (SEM), a contact angle (CA) meter, and a Fourier transform infrared spectrometer (FT-IR). Using ground calcium carbonate (heavy CaCO3) as contaminating particle, the self-cleaning performance of the wing surface was evaluated. The wing surfaces, composed of naturally hydrophobic material (chitin, protein, fat, etc.), possess complicated hierarchical micro/nanostructures. According to the large CA (149.5~156.9° for butterfly, 150.5~155.6° for moth) and small sliding angle (SA, 1~3°), the wing surface is of low adhesion and superhydrophobicity. The removal rate of contaminating particle from the wing surface is averagely 88.3% (butterfly wing) and 88.0% (moth wing). There is a good positive correlation (R2=0.8152 for butterfly, 0.8436 for moth) between particle removal rate and roughness index of the wing surface. The coupling effect of material element and structural element contributes to the outstanding superhydrophobicity and self-cleaning performance of the wing surface. The wings of Lepidoptera insect can be potentially used as templates for biomimetic preparation of intelligent interfacial material with multi-functions.
Research on Permeability Coefficient about Tertiary System Sandstone of Humaling Tunnel
Authors: He Wen She , Wu Lan Zhen , Zhang Zhen Chang
Published: January 2015

Constant flow pumping test is finished in the 7th shaft tunnel of Humaling,based on the measured data,permeability coefficient of tertiary system sandstone is calculated by using Boulton formula wiring method,lining method and water level recovery method.The value is 0.14～0.23 m/d,Providing a reliable basis for further engineering application.Compared this data with that permeability coefficient calculated by J.Dupuit method when pumping stability.The conclusion is that there have a critical value,the latter numerical value greater than the former when the distance of observation well and pumping well less than critical value,and gradually become smaller than the former with the distance of observation well and pumping well increase and greater than critical value.
Study on the Physical and Mechanical Performance of Graphite Foamed Cement-Based Material
Authors: Liu Jun , Meng Xiang Mei , Mu Hong Tao
Published: January 2015

To figure out the physical and mechanical performance of graphite foam concrete，orthogonal test was applied to ascertain four factors for graphite foamed cement-based material (GFCBM). The influence of water cement ratio, graphite content, hydrogen peroxide content and sodium sulfite content on the dry density, porosity and compressive strength was also discussed. The results show that sodium sulfite has a relatively significant effect on the physical and mechanical performance. The dry density and compressive strength increases first and then decrease with the water cement ratio, adding of hydrogen peroxide and sodium sulfite increasing and increase with adding of the graphite. The trend of porosity is opposite to the dry density and compressive strength. The optimal scheme for this experiment is water cement ratio 0.68, 5% graphite, 8% hydrogen peroxide and 6% sodium sulfate.
The Initial Selection Method Study of SMA Asphalt Mixture Gradation Curve Based on Orthogonal Experiment
Authors: Tian Peng , Zhan Gao Feng , Nai Lei
Published: January 2015

The gradation curve of SMA asphalt mixture directly affect the performance of road. Before the optimization gradation of asphalt mixture material, the primary material of asphalt mixture gradation curve must be determined in the plan. Through the orthogonal experiment method, the full collision combination of three levels and three key factors of asphalt mixture effect, that will be taken into account. Through the 9 groups of grading curve experiment, the expected results of 27 groups in the general experiment will be achieved. Comparative analysis of advantages and disadvantages with the properties of the mixture road 9 group grading curve corresponding, can get the recommended gradation curve range. Comparing with the normal grading curve primary method, through the orthogonal experiment method in primary SMA asphalt mixture curve can reduce the testing time, reduce material’s artificial waste and environmental pollution.
Study on the Performance of Wollastonite Modified PTFE Composite Material
Authors: Yu Jiang Hong , Li Chao , Yao Qi Shui
Published: January 2015

In the research, Polytetrafluoroethene (PTFE) is applied in a newly elastic composite cylindrical roller bearing, i.e. PTFE is modified into the traditional hollow cylindrical roller bearing so as to improve the vibration, wearing properties and life span of the roller bearing. The results show that bearing capacity of the same dimension of WF/PTFE composite materials is higher than that of WP/PTFE composite materials. Small dimension of WF-PTFE composite materials has the best wearing properties under light load conditions; large dimension of WF-PTFE composite materials has better bearing capacity and wearing properties than small dimension of WF filler under heavy load conditions. Compare to traditional method, Rolling stress improves by filler PTFE materials using our method reduces by 17.1% under light load conditions and reduces by 27.7% under heavy load conditions. The research provides basis for the modified material of the elastic composite cylindrical roller bearing.
The Numerical Analysis of Concrete Mechanical Properties and Ductility of Coupling Beam
Authors: Fan Cheng , Li Bao Lei , Chen Dong , Song Li
Published: January 2015

In this paper, on the basis of specimen model size mentioned in steel reinforced concrete coupling beam stress performance research, using the ANSYS finite element software about coupling beam specimens with different steel plates for one-off monotonic loading. Through the comparative analysis of simulation results, to explore the impact of different steel plate forms on concrete mechanical properties and ductility of coupling beams .
The Loosen Circle Radius Based on the Theory of Damage Mechanics
Authors: Bai Hui Ren , Shi Yong Jian , Chen Lan Xiang
Published: January 2015

After surrounding rock is disturbed by some damage form a loosen circle in surrounding rocks of a roadway, in order to solving the range of loosen circle, mechanical mechanism of loosen circle was discussed on the basis of damage mechanics and loosen circle radius calculation formula proposed. This work has some certain reference for roadway support design.
Analysis of a New Processing Method for Small Curvature Aaspheric
Authors: Fu Xiu Hua , Liu Yang , Jia Zong He
Published: January 2015

For the aspheric processing is complex , time consuming and difficult to guarantte the eccentricity ,this paper introduce a new method of aspheric processing --repairing and polishing methed and describe the principle . Best fit radius, removal function were computed by mathematical model method and the respective performance curves were given by simulation. This methed has the particular advantage of shortening the working time ,reducing the eccentric amount of the element and improving the processing efficiency. Through this processing method, do a series of processing experiments on the smaller aspheric tolerance single crystal silicon aspheric.As the result indicated , plane surface shape error PV 0.52 μm,surface roughness RMS value of single-crystal silicon 0.09 μm ,the center deviation was less than1μm and the surface smoothness meet the standard above the grade Π.
Electro-Chemical Micro Drilling by Micro-Spherical Electrode
Authors: Li Han Song , Meng Dong , Wang Guo Qian , Zeng Yong Bin
Published: January 2015

Manufacture of micro holes in difficult-to-machine material is very difficult, electro-chemical machining (ECM) is one of the more appropriate approach. However, micro holes fabricated using ECM can have different diameters at the entrances and exits and such tapering effect is not localized. In this work, a new ECM method named electro-chemical micro drilling (ECMD) for machining high quality straight micro holes in difficult-to-machine material was introduced, and the micro-spherical electrode fabricated by a hybrid technique combining micro-ECM with one pulse electro discharge (OPED) was used in ECMD process. Micro-spherical electrode and ultra short pulses (tens of nanosecond scale) were used to locally dissolve the area with the effect of voltage, pulse width and pulse frequency on the localization distance being studied. High quality micro holes with a diameter of 42 µm in a 70 µm thick nickel foil were drilled using micro-spherical electrode with a sphere diameter of 30 µm.
Influence of Processing Parameters on Cobonding-Induced Deformation of Composite Panel with “I”-Shape Stiffener
Authors: Li Xue Qin , Zhang Zi Long
Published: January 2015

Composite panels with “I”-shape stiffeners are widely used, but cobonding process induces large warpage deformation after demoulding. Finite element simulation was used in this paper to analyze the effects of some representative processing parameters on the process-induced deformation. The results show that the deformation increases with the consolidation pressure, the CTE of mould and the friction coefficient. The deformation is more sensitive to the consolidation pressure and the friction coefficient for a shorter part, while it is more sensitive to the CTE of mould for a longer part.
Reasearch and Application of Basic Tundish Covering Flux in Continuous Casting Process in WISCO
Authors: Rao Jiang Ping , Li Gang Qiang , Yang Zhi Zheng , Wang Yan Feng
Published: January 2015

Fundamental theory of functions of basic tundish coving flux is analyzed at the first step. Several types of the flux used in deferent steel grade include ultra-low carbon steel, low carbon steel and micro-alloyed steel are involved . The result shows that the basic flux with CaO/SiO2 to be 3~5 can help to control the SiO2 be reduced by Al in steel within ±2%, and whole cleaness keeps stable with suitable component and proper process condition, marked with the T[O] content change ranged within 3ppm. But the basicity should be variable considering the productivity for different steel grade.
Research on Dynamic Temperature Field Modeling of the Solid Carbide End Mill in High-Speed Milling
Authors: Bo Wei , Tan Guang Yu , Guo Lin Lin , Li Guang Hui
Published: January 2015

Cutting temperature is a key factor in impacting the solid carbide end mill’s life, the rule of solid carbide end mill temperature field is the research focus. In this paper, the solid carbide end mill helical side edge is regarded as a helical coil heat source, the tool chip friction surface is considered as a surface heat source which consists of countless helical coil heat source. Based on heat source method, the model of continuous dynamic temperature field simulation of a solid carbide end mills cutting process is established.
Study of Laser Peening on TiAl Alloy Properties with Different Parameters
Authors: Gu Yao Xin , Qiao Hong Chao
Published: January 2015

Laser peening is a novel surface treatment process that generates deep compressive residual stresses and microstructural changes and thereby dramatically improves fatigue strength of critical metal aircraft engine parts. In order to study the effects of laser peening on properties of TiAl alloy, Surface micro-hardness, microstructural, residual stress and pole figures before and after laser peening were tested. The experimental results showed that surface micro-hardness increased by 23%. The compressive residual stress increased 20 times. The texture in the normal direction of 8J peened sample showed a strong fiber texture components 10o away. In conclusion, the laser peening could improve properties of TiAl alloy.
Tool-Chip Friction and Two-Dimensional Numerical Simulation Analysis of High-Speed Milling AISI304
Authors: Guo Lin Lin , Li Guang Hui , Yin Ning Xia , Tan Guang Yu
Published: January 2015

The physical friction system model was established between the tool and the chip based on the analysis of tri-bological behavior of high speed milling process of the end mill. The finite element simulation method was employed to study the tool-chip friction model, and the two-dimensional(2D) finite element model of milling was created. The numerical results revealed the chip morphology, stress and temperature distribution of the tool-chip contact surface. The tool temperature field distribution provided supports for tool-chip friction state theory and the 3D milling model.
The Research on the Dielectric Constant of Polyester Knitted Fabrics
Authors: Liu Yuan Jun , Zhao Xiao Ming
Published: January 2015

The influence on polyester knitted fabrics’ dielectric constant of each fabric organization structure of knitted fabrics were discussed by a single factor test method, and made a good choice from various polyester knitted fabric knitting parameters so as to the polyester knitted fabric was provided with the maximum real part and imaginary part of the dielectric constant. The results showed that when the structure of polyester knitted fabric was 2+2 rib, polyester knitted fabric had a good microwave absorbing property in these knitting parameters.
Wearing Comfort and Electromagnetic Shielding Effectiveness for Shielding Fabrics Based on Grey Cluster Analysis
Authors: SONG Xiao Lei , Chen Ai Hua , Wei Li
Published: January 2015

In this paper, the comprehensive property of shielding fabrics was analyzed by the mathematic method-grey cluster analysis. Eight samples of shielding fabrics were selected as research objects in the experiment. The electromagnetic shielding effectiveness in different frequencies and wearing comfort, including tensile and bending property, abrasive resistance, permeability and color fastness were measured and then analyzed. Grey cluster analysis was carried out to evaluate the comprehensive property of the chosen samples by eight clustering objects and nine clustering indexes. In the process of data operation, MATLAB7.0 was used to calculate experimental results due to its high efficiency and accuracy. According to cluster analysis results, the eight samples were divided into three gray classes, namely, 2#, 5# belonging to “first-rate”, 4# and 7# belonging to “medium” and 1#, 3#, 6#,8# belonging to “low-rate”.
A New Processing Technology of Comprehensive Utilization on the Gold Copper Ore
Authors: Deng Shan Zhi , Xiong Wen Liang , Zeng Xiao Bo
Published: January 2015

The character of one refractory gold copper mine located in the west of the Sichuan province is so complex, that the valuable element of the ore cannot be recovered by the traditional beneficiation processing. In this paper, a series of tests were conducted to optimize the suitable collector and develop a new beneficiation processing to recover the valuable associated minerals as while as the copper minerals. The results of the tests showed that the bulk-concentrate with 14.73% of Cu grade, 40.59×10-6 of Au grade and 2360.00×10-6 of Ag grade can be obtained from the recommended bulk flotation processing. The recommended processing showed in this paper could greatly improve the copper mineral recovery and reduce emissions of copper tailings, which is very important for the copper beneficiation technology development and the protection of the environment.
Effect of 3D Stereoscopic Embossed Polyolefin Nonwovens on Permeability of Diapers
Authors: Ke Jun Mu , Li Guo Biao , Zhang Hua Ji
Published: January 2015

The PP/PE composite fibers were prepared by melt extrusion, using polypropylene (PP) and polyethylene (PE) as raw materials and ethylene-octene block copolymers (OBC), titanium dioxide, antioxidants as additives. 3D stereoscopic embossed polyolefin nonwovens with "cross" pits and "O" type relief structure applied to topsheet of diapers were produced through air bonding process and 3D stereoscopic pressure rollers, respectively. The effect of structure of 3D stereoscopic embossed polyolefin nonwovens on the topsheet run-off and the rewet of diapers were studied by means of a set of permeability test. Comparing with the diapers using hot air nonwoven fabric as topsheet, the results of the diapers using 3D stereoscopic embossed polyolefin nonwovens as topsheet showed that the topsheet run-off decreased by 72.0%, as well as the first and second rewet reduced by 40.4% and 57.5%, respectively.
Experimental Research on Oolitic Hematite Utilizing Metallic Roasting-Magnetic Separation Processing
Authors: Deng Bing , Zhang Yuan , Zhang Qin , Sun Zhi Yong
Published: January 2015

The condition tests on the metallic roasting process and the magnetic separation process for the Exi oolitic hematite, are discussed. The results demonstrate that the oolitic hematite is roasted best with excess coal as reductant at the temperature of 1050°C for 3 hours, and a iron concentrate with the grade of 94%, the metallization rate of 95% and the recovery of 88% is obtained through permanent magnet roughing of coarse grains and magnetic media desliming after grinding.
Study on the Corrosion Electrochemical Behaviors of Carbon Steel in Eutrophic Fresh Water
Authors: Cao Gang , Xia Dong Sheng , Sun Lei
Published: January 2015

The environment of fresh water has been changed greatly because of eutrophication, which made the corrosion behaviors of metals in this water become more and more complex. Presently, the study on the corrosion behaviors and mechanism of metals in eutrophic fresh water was very rare; therefore, we considered the research on this field was a very meaningful work. In this paper, the corrosion behaviors of carbon steel in eutrophic fresh water were studied by electrochemical methods, the influence of temperature, value of pH and dissolving oxygen content on the electrochemical corrosion behavior of carbon steel were investigated mostly.
Stress Dependence of Magnetostriction and Magnetic Properties in Electrical Steel
Authors: Gong Wen Jie , Zhang Zhi Gao , Hou Rui Fen , Lin An Li , Xu Zhi Yi , He Jian , Fan Wen , Wang Jing Ping
Published: January 2015

The magnetostriction and magnetic properties of electrical steel are depended on the external stress. In this paper, a noncontact magneostriction measuring system using laser displacement meter with high resolution of 10 nm has been built. The grain-oriented electrical steel with dimensions 500 mm × 100 mm × 0.3 mm was measured between 20 MPa and-20 MPa. The magnetostriction and magnetic properties were highly sensitively to stress. A clear relationship between power loss and magnetostriction under stress was found, and the underlying mechanism has been discussed.
Recent Advances in Luminescent Nanomaterials for Solid State Lighting Applications
Authors: Tiwari Sanjay , Yakhmi Jatinder V.
Published: January 2015

Nanotechnology has led to a profound paradigm shift after the developments in recent years and after being recognised as one of the most important areas of impending technology. Nanomaterials are the basis of newly emerging nanotechnologies for various applications in sensors, photonics, drug delivery, proteomics, biomolecular electronics, and homeland security. Luminescent nanomaterials have attracted great interest worldwide because of their unusual structural, optical and electronic properties as well as efforts to prepare miniaturised devices. By understanding and manipulating these properties, the performance of the resulting optical structure can be tailored for desired end-use applications. Luminescence nanoparticles have tremendous potential in revolutionizing many interesting applications in today’s emerging cutting-edge optical technology such as solid state lighting. Solid-state lighting (SSL) relies on the conversion of electricity to visible white light using solid materials. SSL using any of the materials (inorganic, organic, or hybrid) has the potential for unprecedented efficiencies. The development of novel mercury-free inexpensive nanomaterials, that convert longer wavelength UV to blue light eventually into white-light and are eco-friendly with improved luminous efficacy, energy-saving, long-lifetime, and low-power consumption characteristics, is discussed. In this review, we present a general description of EL related to nanomaterials as the emitter and outlines basic research requirements that could enable solid-state lighting to achieve its potential. Continuing progress in the synthesis and purification of SSL materials are beginning to enable separation of extrinsic and intrinsic phenomena and improve device performance. This review mainly focuses on the basic mechanism, classification, synthesis and characterization of luminescent nanomaterials. The review also covers recent advances in lanthanide-based nanomaterials and photoluminescent nanofibers formed by combining electrospun polymeric nanofibers and quantum dots (QDs) for lighting applications. In spite of the remarkable scientific progress in preparation processes and applications of nanomaterials, they are still not widely used by the industry. Finally, we conclude with a look at the future challenges and prospects of the development of electroluminescence (EL) devices for lighting.Contents of Paper