In this study,an environmental simulation platform(ETS-02)was constructed for high-precision geodesic instruments(e.g.,absolute/relative gravimeters and inclinometers),to test the disturbances caused by environmental ...In this study,an environmental simulation platform(ETS-02)was constructed for high-precision geodesic instruments(e.g.,absolute/relative gravimeters and inclinometers),to test the disturbances caused by environmental fl uctuations.The outer layer of the platform was constructed with two sets of rectangular electromagnetic coils,which generated the required magnetic fi eld when current was applied.The inner layer was a closed cabin in which radiators were distributed such that the temperature of the experimental space inside the cabin could be controlled,by energy exchange between the radiators and a thermal controller through the fl owing liquid.A high-precision hexapod was used to simulate the tilt-related eff ect.The platform was capable of adjusting temperatures within a dynamic range of 0℃-70℃ at a resolution of 0.01℃.The noise of the power-spectrum density when the cabin was set to room temperature was measured as 0.03℃/Hz^(1/2) at 1 mHz.The magnetic field simulation had a dynamic range of±300μT and stability of 20 nT.The resolution of the ground-tilt simulation was 1 arc s.The inner space of the platform had a volume of approximately 5 m^(3),which is sufficient for most types of instruments to be tested for a general environmental coupling effect.To illustrate the application of the platform,a dual-axis inclinometer was built and tested carefully with the platform,and the accuracy of the calibration factors was found to be signifi cantly improved.展开更多
为解决传统水泥基注浆材料成本高、能耗和污染大等问题,基于固废材料协同效应,以CFB粉煤灰(CFBFA)、钢渣微粉(SS)、高炉矿渣(BFS)和脱硫石膏(FGD)为原材料制备新型绿色环保的公路路基及桥隧下伏采空区全固废注浆材料。通过系列室内试验...为解决传统水泥基注浆材料成本高、能耗和污染大等问题,基于固废材料协同效应,以CFB粉煤灰(CFBFA)、钢渣微粉(SS)、高炉矿渣(BFS)和脱硫石膏(FGD)为原材料制备新型绿色环保的公路路基及桥隧下伏采空区全固废注浆材料。通过系列室内试验,研究了不同CFBFA掺量(80%、60%、50%、40%、20%)、水固比(1∶1.3、1∶1.4、1∶1.5、1∶1.6)及SS与BFS质量比(8∶2、6∶4)等因素对浆料的密度、流动度、析水率、结石率以及结石体单轴抗压强度(UCS)的影响,并结合XRD、TG、SEM等微观试验,分析了水化作用机理。研究结果表明:水固比相同时,随CFBFA掺量的增加,浆料流动度、结石率增大,而密度、析水率和UCS减小;原材料配比相同时,随水固比增大,浆料析水率增加,流动度、密度、结石率及UCS减小;水固比与CFBFA掺量相同时,随SS与BFS比值增大,浆料密度与析水率增大,流动度、结石率与UCS减小;CFBFA掺量、水固比对浆料工作性能的影响均显著,且CFBFA、BFS掺量对UCS影响大;结石体28 d UCS试件中仅有A1组的小于0.6 MPa,且最大值达16.71 MPa。综合考虑浆料工作、力学性能,同时结合经济性,提出了公路路基、桥隧下伏采空区注浆材料的施工建议配合比。浆料水化产物主要为C—S—(A)—H、AFt及Ca(OH)2,减小水固比、增加SS与BFS掺量、提高试件养护龄期均可使水化产物(C—S—(A)—H、AFt)数量增多,试件更密实,UCS更高,且BFS掺量增加有助于Ca(OH)2二次水化和AFt等水化产物的生成。实际应用中,通过调整CFBFA、SS、BFS与FGD全固废注浆材料配合比,其工作性能及UCS均能满足相关规范的要求,用于采空区注浆是切实可行的。展开更多
A new mixed metal phosphate of Cs2Ga4P8O(27), which also can be written as Cs2Ga4(P2O7)2(P4O(13)), was synthesized by high temperature solid state syntheses and structurally characterized by X-ray single-crystal diffr...A new mixed metal phosphate of Cs2Ga4P8O(27), which also can be written as Cs2Ga4(P2O7)2(P4O(13)), was synthesized by high temperature solid state syntheses and structurally characterized by X-ray single-crystal diffraction for the first time. The title compound crystallizes in monoclinic system with space group P21/c(No.14), and features a 3D framework which can be considered as alternating layers of {Ga2(P4O(13))}n and {Ga2(P2O7)2}n^(2n-) parallel to the bc plane further connected by Ga-O-P linkages, where Cs^+ cations are located in the free space between two adjacent layers to charge the valence. The Ga^(3+) cations in the compound contain two kinds of coordination models(4 and 6). Furthermore, the title compound coexists of two phospho-ric anionic groups which are non-condensed horseshoe-shaped(P4O(13)) and two(P2O7) with different symmetries. The density functional theory calculations indicate that Cs2Ga4P8O(27) is a direct band gap insulator with flat valence and dispersive conduction bands and a band gap of 4.13 eV.展开更多
Objective To compare the clinical effectiveness of different scheme of pharmacotherapy in treatment of combined cardiac pathology. Methods The was completed comparative analysis of different regimens using various ACE...Objective To compare the clinical effectiveness of different scheme of pharmacotherapy in treatment of combined cardiac pathology. Methods The was completed comparative analysis of different regimens using various ACE inhibitors(perindopril and fosinopril) in patients with combined cardiovascular pathology.Results The results of treatment showed improvement in hemodynamic and clinical parameters. Conclusion The results of the study point to the pronounced clinical efficacy of combined therapy in both groups of patients with concomitant cardiac pathology.展开更多
基金This work was supported by National Scientifi c Instrument Development Fund(No.ZDYZ2012-1-04)State Natural Sciences Fund(No.11235004,91636112,41474163).
文摘In this study,an environmental simulation platform(ETS-02)was constructed for high-precision geodesic instruments(e.g.,absolute/relative gravimeters and inclinometers),to test the disturbances caused by environmental fl uctuations.The outer layer of the platform was constructed with two sets of rectangular electromagnetic coils,which generated the required magnetic fi eld when current was applied.The inner layer was a closed cabin in which radiators were distributed such that the temperature of the experimental space inside the cabin could be controlled,by energy exchange between the radiators and a thermal controller through the fl owing liquid.A high-precision hexapod was used to simulate the tilt-related eff ect.The platform was capable of adjusting temperatures within a dynamic range of 0℃-70℃ at a resolution of 0.01℃.The noise of the power-spectrum density when the cabin was set to room temperature was measured as 0.03℃/Hz^(1/2) at 1 mHz.The magnetic field simulation had a dynamic range of±300μT and stability of 20 nT.The resolution of the ground-tilt simulation was 1 arc s.The inner space of the platform had a volume of approximately 5 m^(3),which is sufficient for most types of instruments to be tested for a general environmental coupling effect.To illustrate the application of the platform,a dual-axis inclinometer was built and tested carefully with the platform,and the accuracy of the calibration factors was found to be signifi cantly improved.
文摘为解决传统水泥基注浆材料成本高、能耗和污染大等问题,基于固废材料协同效应,以CFB粉煤灰(CFBFA)、钢渣微粉(SS)、高炉矿渣(BFS)和脱硫石膏(FGD)为原材料制备新型绿色环保的公路路基及桥隧下伏采空区全固废注浆材料。通过系列室内试验,研究了不同CFBFA掺量(80%、60%、50%、40%、20%)、水固比(1∶1.3、1∶1.4、1∶1.5、1∶1.6)及SS与BFS质量比(8∶2、6∶4)等因素对浆料的密度、流动度、析水率、结石率以及结石体单轴抗压强度(UCS)的影响,并结合XRD、TG、SEM等微观试验,分析了水化作用机理。研究结果表明:水固比相同时,随CFBFA掺量的增加,浆料流动度、结石率增大,而密度、析水率和UCS减小;原材料配比相同时,随水固比增大,浆料析水率增加,流动度、密度、结石率及UCS减小;水固比与CFBFA掺量相同时,随SS与BFS比值增大,浆料密度与析水率增大,流动度、结石率与UCS减小;CFBFA掺量、水固比对浆料工作性能的影响均显著,且CFBFA、BFS掺量对UCS影响大;结石体28 d UCS试件中仅有A1组的小于0.6 MPa,且最大值达16.71 MPa。综合考虑浆料工作、力学性能,同时结合经济性,提出了公路路基、桥隧下伏采空区注浆材料的施工建议配合比。浆料水化产物主要为C—S—(A)—H、AFt及Ca(OH)2,减小水固比、增加SS与BFS掺量、提高试件养护龄期均可使水化产物(C—S—(A)—H、AFt)数量增多,试件更密实,UCS更高,且BFS掺量增加有助于Ca(OH)2二次水化和AFt等水化产物的生成。实际应用中,通过调整CFBFA、SS、BFS与FGD全固废注浆材料配合比,其工作性能及UCS均能满足相关规范的要求,用于采空区注浆是切实可行的。
基金Supported by the National Natural Science Foundation of China(No.21101156)the State Key Laboratory of Structure Chemistry(No.20150016)+2 种基金Outstanding youth of colleges and universities of Department of Education,Fujian Province Natural Science Foundation for Youths(No.2016J05109)Fujian Education Department(No.JK2015056)the founding from Fujian Jiangxia University(JXZ2016002)。
文摘A new mixed metal phosphate of Cs2Ga4P8O(27), which also can be written as Cs2Ga4(P2O7)2(P4O(13)), was synthesized by high temperature solid state syntheses and structurally characterized by X-ray single-crystal diffraction for the first time. The title compound crystallizes in monoclinic system with space group P21/c(No.14), and features a 3D framework which can be considered as alternating layers of {Ga2(P4O(13))}n and {Ga2(P2O7)2}n^(2n-) parallel to the bc plane further connected by Ga-O-P linkages, where Cs^+ cations are located in the free space between two adjacent layers to charge the valence. The Ga^(3+) cations in the compound contain two kinds of coordination models(4 and 6). Furthermore, the title compound coexists of two phospho-ric anionic groups which are non-condensed horseshoe-shaped(P4O(13)) and two(P2O7) with different symmetries. The density functional theory calculations indicate that Cs2Ga4P8O(27) is a direct band gap insulator with flat valence and dispersive conduction bands and a band gap of 4.13 eV.
文摘Objective To compare the clinical effectiveness of different scheme of pharmacotherapy in treatment of combined cardiac pathology. Methods The was completed comparative analysis of different regimens using various ACE inhibitors(perindopril and fosinopril) in patients with combined cardiovascular pathology.Results The results of treatment showed improvement in hemodynamic and clinical parameters. Conclusion The results of the study point to the pronounced clinical efficacy of combined therapy in both groups of patients with concomitant cardiac pathology.
