本研究使用120例,8个指标,多重回归分析结果显示3个指标,即血管稳定性,穿刺部位和穿刺相对速度是决定穿刺成功率的主要因素。多因素方差分析(Multiple analysis of variance)指出静脉穿刺部位,血管稳定性和血管深度可以相互影响,并且影...本研究使用120例,8个指标,多重回归分析结果显示3个指标,即血管稳定性,穿刺部位和穿刺相对速度是决定穿刺成功率的主要因素。多因素方差分析(Multiple analysis of variance)指出静脉穿刺部位,血管稳定性和血管深度可以相互影响,并且影响穿刺成功率。通过以上的统计结果,得出结论。同时,笔者建议进行深入的研究以满足不同地区护士的需要。展开更多
SOI (silicon-on-insulator) is a new material with a lot of important perform- ances such as large index difference, low transmission loss. Fabrication processes for SOI based optoelectronic devices are compatible with...SOI (silicon-on-insulator) is a new material with a lot of important perform- ances such as large index difference, low transmission loss. Fabrication processes for SOI based optoelectronic devices are compatible with conventional IC processes. Having the potential of OEIC monolithic integration, SOI based optoelectronic devices have shown many good characteristics and become more and more attractive recently. In this paper, the recent progresses of SOI waveguide devices in our research group are presented. By highly effective numerical simulation, the single mode conditions for SOI rib waveguides with rectangular and trapezoidal cross-section were accurately investigated. Using both chemical anisotropic wet etching and plasma dry etching techniques, SOI single mode rib waveguide, MMI coupler, VOA (variable optical attenuator), 2×2 thermal-optical switch were successfully designed and fabricated. Based on these, 4×4 and 8×8 SOI optical waveguide integrated switch matrixes are demonstrated for the first time.展开更多
Let A be a general expansive matrix on Rn.The aims of this article are twofold.The first one is to give a survey on the recent developments of anisotropic Hardy-type function spaces on Rn,including anisotropic Hardy–...Let A be a general expansive matrix on Rn.The aims of this article are twofold.The first one is to give a survey on the recent developments of anisotropic Hardy-type function spaces on Rn,including anisotropic Hardy–Lorentz spaces,anisotropic variable Hardy spaces and anisotropic variable Hardy–Lorentz spaces as well as anisotropic Musielak–Orlicz Hardy spaces.The second one is to correct some errors and seal some gaps existing in the known articles.Some unsolved problems are also presented.展开更多
文摘本研究使用120例,8个指标,多重回归分析结果显示3个指标,即血管稳定性,穿刺部位和穿刺相对速度是决定穿刺成功率的主要因素。多因素方差分析(Multiple analysis of variance)指出静脉穿刺部位,血管稳定性和血管深度可以相互影响,并且影响穿刺成功率。通过以上的统计结果,得出结论。同时,笔者建议进行深入的研究以满足不同地区护士的需要。
基金This work was supported by the National“973"Project of China(Grant No,G2000-03-66)the National“863”Project(Grant No.2002AA3 12060)of the Ministry of Science and Technology of Chinathe National Natural Science Foundation of China(Grant Nos.69896260 and 60336010).
文摘SOI (silicon-on-insulator) is a new material with a lot of important perform- ances such as large index difference, low transmission loss. Fabrication processes for SOI based optoelectronic devices are compatible with conventional IC processes. Having the potential of OEIC monolithic integration, SOI based optoelectronic devices have shown many good characteristics and become more and more attractive recently. In this paper, the recent progresses of SOI waveguide devices in our research group are presented. By highly effective numerical simulation, the single mode conditions for SOI rib waveguides with rectangular and trapezoidal cross-section were accurately investigated. Using both chemical anisotropic wet etching and plasma dry etching techniques, SOI single mode rib waveguide, MMI coupler, VOA (variable optical attenuator), 2×2 thermal-optical switch were successfully designed and fabricated. Based on these, 4×4 and 8×8 SOI optical waveguide integrated switch matrixes are demonstrated for the first time.
基金the Scientific Research Foundation of China University of Mining and Technology(Grant No.102519054)the German Research Foundation(DFG)(Grant No.Ha 2794/8-1)the National Natural Science Foundation of China(Grant Nos.11761131002,11971058 and 11671185).
文摘Let A be a general expansive matrix on Rn.The aims of this article are twofold.The first one is to give a survey on the recent developments of anisotropic Hardy-type function spaces on Rn,including anisotropic Hardy–Lorentz spaces,anisotropic variable Hardy spaces and anisotropic variable Hardy–Lorentz spaces as well as anisotropic Musielak–Orlicz Hardy spaces.The second one is to correct some errors and seal some gaps existing in the known articles.Some unsolved problems are also presented.
