This article introduces the concepts relating to deep-cut vacuum distillation and its suitability,and analyzes the deep-cut vacuum distillation technique licensed by the KBC Advanced Technologies to the 10 Mt/a CDU/VD...This article introduces the concepts relating to deep-cut vacuum distillation and its suitability,and analyzes the deep-cut vacuum distillation technique licensed by the KBC Advanced Technologies to the 10 Mt/a CDU/VDU of the Qingdao refinery and makes comparison on the test run data after commissioning of the distillation unit.The test results have confirmed that the operation of the CDU/VDU had reached the expected goal to achieve good social and economic benefits.展开更多
Deep large span cut holes are difficult to stabilize. The 7801 cut hole in the Lu'an Wuyang Mine was used as this project's background. The main factors affecting large span cut hole stability are analyzed. Pr...Deep large span cut holes are difficult to stabilize. The 7801 cut hole in the Lu'an Wuyang Mine was used as this project's background. The main factors affecting large span cut hole stability are analyzed. Pre- stressed bolting theory was used to design a roof control method for a large span roadway. By reducing the span and applying equal strength coordinated supports the rock could be stabilized. The control prin- ciples and methods are given herein along with the analysis. A double micro arch cross section roadway is defined and its use in solving the current problem is described. Beam arch theory was used to build a model of the double micro arch cross section roadway. A support reverse force model for the arch foot intersection was also derived. A support method based upon reducing the width of the large span in the cut hole is presented. These results show that the reduced span of the roadway roof plus the use of cable anchors and single supports gives an effective way to control the large span cut hole. On site monitoring showed that the reduced span support from the double micro arch cross section roadway design had a significant effect. The roadway surface displacement was small and harmful deformation of the cut hole was effectively controlled. This will ensure its long term stability.展开更多
Deep-sea cobalt crusts water jet cutting method is proposed to avoid cutter impact load. With simulation calculations and experimental tests, water jet system parameters and its cutting ability were studied. Simula-ti...Deep-sea cobalt crusts water jet cutting method is proposed to avoid cutter impact load. With simulation calculations and experimental tests, water jet system parameters and its cutting ability were studied. Simula-tion results show that working pressure, ejection range and ejection angle of water jet system are main parameters of its cutting ability. Its important degree is in turn the working pressure, ejection range and ejection angle. Increasing water jet system working pressure is the most effective way to improve its cutting ability. When water jet working pressure is constant, in order to improve its cutting ability, the ejection range should be less than 4mm (four times of nozzle diameter) and the ejection angle should be about 13o. Experimental results show that there is a threshold pressure during water jet cutting cobalt crusts simulation material. With the increase of water jet working pressure, its cutting ability increases dramatically. With the increasing of water jet ejection range, its cutting ability decreases sharply. The optimal ejection angle is about 13o</sup.展开更多
The chemical-electronic structures of functional modules and their spatial arrangement mainly determine the functional performance of materials.Tetrahedral structural units in borates can be used to widen the band gap...The chemical-electronic structures of functional modules and their spatial arrangement mainly determine the functional performance of materials.Tetrahedral structural units in borates can be used to widen the band gap for designing deep-ultraviolet/ultraviolet(UV)nonlinear optical(NLO)materials,but they are rarely favored due to their weak optical nonlinearity.In this study,we investigate the second-harmonic generation(SHG)response of LiGeBO_(4) with a combined experimental and computational approach.LiGeBO_(4) achieves a balance between a large band gap(6.2 eV)and a strong SHG coefficient(double that of KH_(2)PO_(4)(KDP)),which rarely exists in tetrahedral-based crystals.The origin of the SHG effect in LiGeBO_(4) is analyzed in detail using density functional theory(DFT)calculations.The calculated frequency dependent SHG efficiency of LiGeBO_(4) is 1.1 pm V^(−1),which is in accordance with the experimental value.Based on the modern polarization theory,the nonlinear electronic polarization induced by an external electric field along the[001]direction is about 4 pm V^(−1),which indicates the SHG susceptibility is 2 pm V^(−1) along the z-direction.Moreover,the SHG-density result shows that the SHG effect of LiGeBO_(4) mostly comes from the Ge–B–O tetrahedral units.展开更多
A new complex alkaline-earth metal borosilicate chloride Ba_(3)Ca4(BO_(3))_(3)(SiO4)Cl has been successfully synthesized by the high-temperature solution method.It crystallizes in the space group P6_(3)mc(no.186)of th...A new complex alkaline-earth metal borosilicate chloride Ba_(3)Ca4(BO_(3))_(3)(SiO4)Cl has been successfully synthesized by the high-temperature solution method.It crystallizes in the space group P6_(3)mc(no.186)of the hexagonal system.展开更多
A new member in the bariumfluorooxoborate family,namely Ba_(2)B_(7)O_(12)F,was obtained by the high-temp erature solution method in an open system under ambient pressure.The structure features a new funda mental build...A new member in the bariumfluorooxoborate family,namely Ba_(2)B_(7)O_(12)F,was obtained by the high-temp erature solution method in an open system under ambient pressure.The structure features a new funda mental building block[B_(7)O_(16)F],which interconnects with each other to form the anionic framework[B_(7)O_(12)F]∞with two different caves in which the cations reside.The experiment result indicates that Ba_(2)B_(7)O_(12)F possesses a deep-ultraviolet cut-offedge below 180 nm.展开更多
文摘This article introduces the concepts relating to deep-cut vacuum distillation and its suitability,and analyzes the deep-cut vacuum distillation technique licensed by the KBC Advanced Technologies to the 10 Mt/a CDU/VDU of the Qingdao refinery and makes comparison on the test run data after commissioning of the distillation unit.The test results have confirmed that the operation of the CDU/VDU had reached the expected goal to achieve good social and economic benefits.
基金Financial supports are from the National Natural Science Foundation of China (No. 50874104)the Scientific Research Industrialization Project of Jiangsu Universities (No. JH07-023)
文摘Deep large span cut holes are difficult to stabilize. The 7801 cut hole in the Lu'an Wuyang Mine was used as this project's background. The main factors affecting large span cut hole stability are analyzed. Pre- stressed bolting theory was used to design a roof control method for a large span roadway. By reducing the span and applying equal strength coordinated supports the rock could be stabilized. The control prin- ciples and methods are given herein along with the analysis. A double micro arch cross section roadway is defined and its use in solving the current problem is described. Beam arch theory was used to build a model of the double micro arch cross section roadway. A support reverse force model for the arch foot intersection was also derived. A support method based upon reducing the width of the large span in the cut hole is presented. These results show that the reduced span of the roadway roof plus the use of cable anchors and single supports gives an effective way to control the large span cut hole. On site monitoring showed that the reduced span support from the double micro arch cross section roadway design had a significant effect. The roadway surface displacement was small and harmful deformation of the cut hole was effectively controlled. This will ensure its long term stability.
文摘Deep-sea cobalt crusts water jet cutting method is proposed to avoid cutter impact load. With simulation calculations and experimental tests, water jet system parameters and its cutting ability were studied. Simula-tion results show that working pressure, ejection range and ejection angle of water jet system are main parameters of its cutting ability. Its important degree is in turn the working pressure, ejection range and ejection angle. Increasing water jet system working pressure is the most effective way to improve its cutting ability. When water jet working pressure is constant, in order to improve its cutting ability, the ejection range should be less than 4mm (four times of nozzle diameter) and the ejection angle should be about 13o. Experimental results show that there is a threshold pressure during water jet cutting cobalt crusts simulation material. With the increase of water jet working pressure, its cutting ability increases dramatically. With the increasing of water jet ejection range, its cutting ability decreases sharply. The optimal ejection angle is about 13o</sup.
基金supported by the Western Light Foundation of CAS(Grant No.2017-XBQNXZ-B-006)the Shanghai Cooperation Organization Science and Technology Partnership Program(Grant No.2017E01013)+2 种基金the National Natural Science Foundation of China(Grant No.11774414,11474353)the Tianshan Innovation Team Program(Grant No.2018D14001)support from the“Fujian Institute of Innovation,Chinese Academy of Sciences”(Grant No.FJCXY18010202).
文摘The chemical-electronic structures of functional modules and their spatial arrangement mainly determine the functional performance of materials.Tetrahedral structural units in borates can be used to widen the band gap for designing deep-ultraviolet/ultraviolet(UV)nonlinear optical(NLO)materials,but they are rarely favored due to their weak optical nonlinearity.In this study,we investigate the second-harmonic generation(SHG)response of LiGeBO_(4) with a combined experimental and computational approach.LiGeBO_(4) achieves a balance between a large band gap(6.2 eV)and a strong SHG coefficient(double that of KH_(2)PO_(4)(KDP)),which rarely exists in tetrahedral-based crystals.The origin of the SHG effect in LiGeBO_(4) is analyzed in detail using density functional theory(DFT)calculations.The calculated frequency dependent SHG efficiency of LiGeBO_(4) is 1.1 pm V^(−1),which is in accordance with the experimental value.Based on the modern polarization theory,the nonlinear electronic polarization induced by an external electric field along the[001]direction is about 4 pm V^(−1),which indicates the SHG susceptibility is 2 pm V^(−1) along the z-direction.Moreover,the SHG-density result shows that the SHG effect of LiGeBO_(4) mostly comes from the Ge–B–O tetrahedral units.
基金supported by the Key Research Project of Frontier Science of CAS(Grant No.QYZDB-SSW-JSC049)the National Natural Science Foundation of China(Grant No.61835014 and 51425206)+1 种基金the National Key Research Project(Grant No.2016YFB0402104)the Youth Innovation Promotion Association of CAS(Grant No.2012305).
文摘A new complex alkaline-earth metal borosilicate chloride Ba_(3)Ca4(BO_(3))_(3)(SiO4)Cl has been successfully synthesized by the high-temperature solution method.It crystallizes in the space group P6_(3)mc(no.186)of the hexagonal system.
基金supported by the National Natural Science Foundation of China(U1703132,51872325,61835014 and 51972336)Tianshan Innovation Team Program(2018D14001)+1 种基金Xinjiang International Science&Technology Cooperation Program(2017E01014 and 2017E01013)Fujian Innovation Academy,CAS and the National Key Research Project(2016YFB0402104).
文摘A new member in the bariumfluorooxoborate family,namely Ba_(2)B_(7)O_(12)F,was obtained by the high-temp erature solution method in an open system under ambient pressure.The structure features a new funda mental building block[B_(7)O_(16)F],which interconnects with each other to form the anionic framework[B_(7)O_(12)F]∞with two different caves in which the cations reside.The experiment result indicates that Ba_(2)B_(7)O_(12)F possesses a deep-ultraviolet cut-offedge below 180 nm.
