The Open Materials Science Journal最新文献_第4页

Synthesis and Catalytic Performance of Al-MCM-48 and Ti-MCM-48 Al-MCM-48和Ti-MCM-48的合成及其催化性能

The Open Materials Science Journal Pub Date : 2015-10-22 DOI: 10.2174/1874088X01509010194

Zhao Zhixi, Liming Zhang, Ping Chen, Yan Kun

引用次数: 0

Characteristics Analysis for Volatile Organic Compounds Emission of Wood Furniture 木质家具挥发性有机物排放特征分析

The Open Materials Science Journal Pub Date : 2015-10-07 DOI: 10.2174/1874088X01509010189

Miao Yanfeng, Guan Huiyuan, Chen Yulong

引用次数: 0

An Experimental Research on Bone Drilling Temperature in OrthopaedicSurgery 骨科手术中钻孔温度的实验研究

The Open Materials Science Journal Pub Date : 2015-10-06 DOI: 10.2174/1874088X01509010178

Y. Hou, Changhe Li, Hongliang Ma, Yanbin Zhang, Min Yang, Xiaowei Zhang

{"title":"An Experimental Research on Bone Drilling Temperature in OrthopaedicSurgery","authors":"Y. Hou, Changhe Li, Hongliang Ma, Yanbin Zhang, Min Yang, Xiaowei Zhang","doi":"10.2174/1874088X01509010178","DOIUrl":"https://doi.org/10.2174/1874088X01509010178","url":null,"abstract":"The bone drilling temperature fields under different cutting parameters and cooling modes were experimental researched by using common twist drill, diamond punching pin, diamond bullet-like grinding head and diamond spherical grinding head. Three cooling modes were applied, namely, natural air cooling, normal saline pouring cooling and normal saline spray cooling. K-thermocouple was used to measure temperature in bone hole. Results showed that the drill shape could influence drilling temperature greatly. The maximum drilling temperature of diamond spherical grinding head is 46.31°C. The maximum drilling temperature of common twist drill is 42.1°C and that of diamond bullet-like grinding head is 38.29°C. The drilling temperatures at drill speed is under 560 r/min, 900 r/min, 1,250 r/min and 2,100 r/min are 38.84°C, 41.1°C, 43.84°C and 46.31°C. This reflects that under same of other drilling parameters, drilling temperature increases with the increase of drill speed. The maximum bone drilling temperatures of diamond punch pin under 2,100 r/min speed of mainshaft and air cooling conditions vary as feed speed increase firstly and then decrease. The normal saline spray cooling has the lowest maximum drilling temperature of (29.34°C) at same depth, following by normal saline pouring cooling of (32.45°C) and air cooling of (40.28°C) successively. The normal saline spray cooling has the best cooling effect, followed by normal saline pouring cooling and air cooling successively.","PeriodicalId":22791,"journal":{"name":"The Open Materials Science Journal","volume":"156 1","pages":"178-188"},"PeriodicalIF":0.0,"publicationDate":"2015-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86314471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Temperature Dependence of the Optical Band Gap and Optical Parametersof Tetramethyl Ammonium Tetrachlorozincate (TMA)2ZnCl4 singleCrystals Around the Normal and Incommensurate Phase Transitions 四氯酸四甲基铵(TMA)2ZnCl4单晶正常和不相称相变时光学带隙和光学参数的温度依赖性

The Open Materials Science Journal Pub Date : 2015-10-06 DOI: 10.2174/1874088X01509010162

A. El-Fadl, A. Nashaat

{"title":"Temperature Dependence of the Optical Band Gap and Optical Parametersof Tetramethyl Ammonium Tetrachlorozincate (TMA)2ZnCl4 singleCrystals Around the Normal and Incommensurate Phase Transitions","authors":"A. El-Fadl, A. Nashaat","doi":"10.2174/1874088X01509010162","DOIUrl":"https://doi.org/10.2174/1874088X01509010162","url":null,"abstract":"Single crystals of tetramethylammonium tetrachlorozincate [N(CH3)4]2ZnCl4 abbreviated hereafter as (TMA)2ZnCl4 were grown using the slow evaporation technique at 315 K. The X-ray powder diffraction patterns indicated that [N(CH3)4]2ZnCl4 belongs to the orthorhombic system with Pmcn symmetry at room temperature. The lattice constants are found to be a= 12.360 Å, b= 15.687 Å and c= 8.985 Å. The values were in good agreement with the values in previous studies. Ultraviolet–visible–near-infrared (UV–Vis–NIR) spectral studies were carried out in the temperature range 276–307 K. This range of temperature involves two phase transition temperatures (Ti=296 K) from normal (parent) to incommensurate phase and (Tc=279 K) from incommensurate to commensurate-ferroelectric phase. The cut off wavelength was found to be 195.016 nm at room temperature. The optical transmittance increases with increasing temperature, and the cut off shifts to higher wavelengths. Analysis reveals that the type of optical transition is the indirect allowed one. The optical energy gap (Eg) has the value of 5.903 eV at room temperature. The value of optical energy gap (Eg) decreases with increasing temperature. The changes in the values of the cut off wavelength and optical energy gap (Eg) with changing the temperature were found to take different rates at the two phases under study, besides anomalous takes place at Ti and Tc. The absorption coefficient (α) as a function of the incident photon energy shows an exponential behavior near the absorption edge which suggests that the Urbach rule is obeyed and indicated the formation of a band tail. Urbach parameters were calculated at different temperatures and the frequencies of effective phonons and electron–phonon interaction constants were determined for various phases.","PeriodicalId":22791,"journal":{"name":"The Open Materials Science Journal","volume":"33 1","pages":"162-172"},"PeriodicalIF":0.0,"publicationDate":"2015-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85792792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Novel Pd Nanocubes Supported on Activated Carbon as a Catalyst for theSuzuki-Miyaura Coupling Reaction 活性炭负载新型钯纳米立方作为suzuki - miyaura偶联反应的催化剂

The Open Materials Science Journal Pub Date : 2015-10-06 DOI: 10.2174/1874088X01509010173

Zhen-hai Shi, X. Bai

引用次数: 3

Study on Influence of Water-Cooled Stool During the Process of Unidirectional Solidification 水冷凳对定向凝固过程影响的研究

The Open Materials Science Journal Pub Date : 2015-09-30 DOI: 10.2174/1874088X01509010158

Ao Guangwu, M. Shen, Zhenshan Zhang, Liang Xiaodong

引用次数: 2

Experimental Study of Tensile Properties of the Steel-Plastic Geogrids 钢-塑土工格栅拉伸性能试验研究

The Open Materials Science Journal Pub Date : 2015-09-28 DOI: 10.2174/1874088X01509010146

W. Qingbiao, R. Lü, Kong Yingchun, X. Lei, Cong Zhang, X. Fei, Tao Zheng, C. Zhen, Tang Lingyu, W. Hui

{"title":"Experimental Study of Tensile Properties of the Steel-Plastic Geogrids","authors":"W. Qingbiao, R. Lü, Kong Yingchun, X. Lei, Cong Zhang, X. Fei, Tao Zheng, C. Zhen, Tang Lingyu, W. Hui","doi":"10.2174/1874088X01509010146","DOIUrl":"https://doi.org/10.2174/1874088X01509010146","url":null,"abstract":"Tensile strength is an important indicator of the steel-plastic geogrid mechanical properties. Tensile strength directly affects the size of the steel geogrid security and stability in support of the project. Stretching through the indoor geogrid test for combinations of different sizes and different geogrid elongation rate, tensile strength of the geogrid were compared. The findings are as follows: (1)The size of the stretching rate has a significant effect on the tensile properties of steel-plastic geogrid. The strain is constant, the stretching rate, the lower the tensile strength of the geogrid; stretching rate is constant, the greater the strain Plastic geogrid, the greater the tensile strength;(2) Peak strain increases with extension rates decrease; higher tensile strength material to reduce the amplitude of the smaller; under the same conditions of stretch rate, the lower the tensile strength of the geogrid, the higher the peak strain;(3)Different effects under different specifications geogrid tensile rate, steel-plastic geogrid degree of influence by the stretching rate is less than the plastic geogrid.","PeriodicalId":22791,"journal":{"name":"The Open Materials Science Journal","volume":"69 1","pages":"146-151"},"PeriodicalIF":0.0,"publicationDate":"2015-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84183326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The Research and Development of Safety Forewarning Composite Integral Strong Geocell 安全预警复合整体式强土工格室的研究与开发

The Open Materials Science Journal Pub Date : 2015-09-28 DOI: 10.2174/1874088X01509010139

W. Qingbiao, Zhang Cong, Wen Xiaokang, L. Rongshan, X. Lei, Jiang Jinquan, Liang Xunmei, L. Shide, X. Fei, Zheng Tao, C. Zhen, Tang Lingyu

{"title":"The Research and Development of Safety Forewarning Composite Integral Strong Geocell","authors":"W. Qingbiao, Zhang Cong, Wen Xiaokang, L. Rongshan, X. Lei, Jiang Jinquan, Liang Xunmei, L. Shide, X. Fei, Zheng Tao, C. Zhen, Tang Lingyu","doi":"10.2174/1874088X01509010139","DOIUrl":"https://doi.org/10.2174/1874088X01509010139","url":null,"abstract":"In the paper, we study the high strength geocell development technology route, analyze the rules of the tensile properties and creep properties of geocell, establish the relationship between elongation and stress and time, thus provide theoretical foundation for the development and engineering application of the new material. Through theoretical analysis, experimental research and numerical simulation, the characteristics, raw materials and craftsmanship of the geocell are studied. The research is given on its stress and deformation rules based on elongation test and creep test. The rationality of the experiment is verified through numerical simulation and the conclusions are as follows: (1) With the research on the geocell traditional craftsmanship, combined with new technologies as special ultrasonic welding technology, intelligent optical fiber technology and fixed locking plate technology, new-type safety forewarning high strength geocell can be developed. (2) Based on the geocell material characteristics, the elongation test and creep test are carried on and the tensile yield strength exceeds 250Mpa; the joint is welded by special crafts and the tensile strength ≥2000N/cm.(3) With FLAC3 D numerical simulation, simulation study is performed on the mechanical properties of the new cell, analyze the relationship between stress and strain, time and displacement, and guide the safety design and management construction of the new-type geocell based on the actual situation of simulation.(4) The innovation points of the new-type geocell include the optimization technique of whole tensile yield strength, falling proof technique of lock parts, positioning and effective monitoring technique, which effectively solves the geological problems of special projects as ecological afforestation, sand fixation and high slope soft subgrade, ensures the quality of the project and has high economic benefits.","PeriodicalId":22791,"journal":{"name":"The Open Materials Science Journal","volume":"750 1","pages":"139-145"},"PeriodicalIF":0.0,"publicationDate":"2015-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74778334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Three-Dimensional Modeling of Carbon Fiber Cloth Surface from Dense and Scattered Points Cloud 基于密集点云和散点云的碳纤维布表面三维建模

The Open Materials Science Journal Pub Date : 2015-09-28 DOI: 10.2174/1874088X01509010152

C. Jie, Chen Li

引用次数: 0

The Symplectic Method in Polar Coordinates for Linear Viscoelastic Materials 线性粘弹性材料的极坐标辛方法

The Open Materials Science Journal Pub Date : 2015-09-23 DOI: 10.2174/1874088X01509010130

W. X. Zhang, Y. Bai

引用次数: 0