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| 1 | Structural reliability analysis and reliability-based design optimization: Recent advances显示文摘We review recent research activities on structural reliability analysis,reliability-based design optimization(RBDO) and applications in complex engineering structural design.Several novel uncertainty propagation methods and reliability models,which are the basis of the reliability assessment,are given.In addition,recent developments on reliability evaluation and sensitivity analysis are highlighted as well as implementation strategies for RBDO. | QIU ZhiPing HUANG Ren WANG XiaoJun QI WuChao | 2013 | Science China(Physics,Mechanics & Astronomy)2013，56，9： | 14 |
| 2 | 3D N,O-Codoped Egg-Box-Like Carbons with Tuned Channels for High Areal Capacitance Supercapacitors显示文摘Functional carbonaceous materials for supercapacitors(SCs)without using acid for post-treatment remain a substantial challenge.In this paper,we present a less harmful strategy for preparing three-dimensional(3D)N,O-codoped egg-box-like carbons(EBCs).The as-prepared EBCs with opened pores provide plentiful channels for ion fast transport,ensure the e ective contact of EBCs electrodes and electrolytes,and enhance the electron conduction.The nitrogen and oxygen atoms doped in EBCs improve the surface wettability of EBC electrodes and provide the pseudocapacitance.Consequently,the EBCs display a prominent areal capacitance of 39.8μF cm-2(340 F g-1)at 0.106 m A cm-2 in 6 M KOH electrolyte.The EBC-based symmetric SC manifests a high areal capacitance to 27.6μF cm-2(236 F g-1)at 0.1075 m A cm-2,a good rate capability of 18.8μF cm-2(160 F g-1)at 215 m A cm-2 and a long-term cycle stability with only 1.9%decay after 50,000 cycles in aqueous electrolyte.Impressively,even in all-solid-state SC,EBC electrode shows a high areal capacitance of 25.0μF cm-2(214 F g-1)and energy density of 0.0233 m Wh cm-2.This work provides an acid-free process to prepare electrode materials from industrial by-products for advanced energy storage devices. | Feng Wei Xiaojun He Lianbo Ma Hanfang Zhang Nan Xiao Jieshan Qiu | 2020 | Nano-Micro Letters2020，12，7： | 13 |
| 3 | Interval analysis method and convex models for impulsive response of structures with uncertain-but-bounded external loads显示文摘为决定到 uncertain-but-bounded 推动的结构的最大、最小的冲动的回答被介绍的二个非概率的、集合理论的方法。分别地,他们基于间隔数学和凸的模型的理论。uncertain-but-bounded 推动被假定是一个凸的集合,超或椭圆体。为二个非概率的方法,不太优先的信息比概率的模型关于推动的不明确的性质被要求。在间隔分析方法和凸的模型之间的比较,作为发现最少有利冲动的反应和最有利的冲动的反应的一个反优化问题被开发,通过数学分析和数字计算被做。这研究的结果显示在从包含不明确的推动的一个椭圆体是坚定的间隔向量的条件下面,冲动的回答的宽度由间隔分析预言方法由凸的模型比那大;在从包含不明确的推动的间隔向量是坚定的椭圆体的条件下面,冲动的回答由间隔分析方法获得了的间隔的宽度由凸的模型是比那小的。 | Zhiping Qiu Xiaojun Wang | 2006 | Acta Mechanica Sinica2006，22，3： | 7 |
| 4 | Influence of temperature on the microstructure of V_2O_5 film prepared by DC magnetron sputtering显示文摘V2O5 films were prepared on silicon wafers by DC magnetron sputtering and post-annealing under various conditions. The influence of depositing and post-annealing temperatures on microstructure of V2O5 films was studied by XRD and Raman scattering measurements. The results reveal that sputtered V2O5 films show preferred growth orientation along (001) planes and the c-axis is perpendicular to the silicon substrate surface. It is interesting to find that both the V2O5 film deposited at temperature of 511 ℃ and the one annealed at 500 ℃ exhibit desirable layer-type structure of orthorhombic symmetry. Such layer-typed V2O5 films are promising candidates for cathodes of rechargeable lithium or magnesium thin-film batteries. | SU Qing PAN Xiaojun XIE Erqing WANG Yinyue QIU Jiawen LIU Xueqin | 2006 | Rare Metals2006，25，z1： | 6 |
| 5 | Safety estimation of structural systems via interval analysis显示文摘Considering that the uncertain information has serious influences on the safety of structural systems and is always limited, it is reasonable that the uncertainties are generally described as interval sets. Based on the non-probabilistic set-theoretic theory, which is applied to measuring the safety of structural components and further combined with the branch-and-bound method for the probabilistic reliability analysis of structural systems, the non-probabilistic branch-and-bound method for determining the dominant failure modes of an uncertain structural system is given. Meanwhile, a new system safety measuring index obtained by the non-probabilistic set-theoretic model is investigated. Moreover, the compatibility between the classical probabilistic model as well as the proposed interval-set model will be discussed to verify the physical meaning of the safety measure in this paper. Some numerical examples are utilized to illustrate the validity and feasibility of the developed method. | Wang Xiaojun Wang Lei Qiu Zhiping | 2013 | Chinese Journal of Aeronautics2013，26，3： | 5 |
| 6 | Interconnected carbon nanocapsules with high N/S co-doping as stable and high-capacity potassium-ion battery anode显示文摘Carbonaceous materials have drawn much attention in potassium-ion batteries (PIBs) due to their low price and superior physicochemical properties. However, the application of carbonaceous materials in PIB anodes is hindered by sluggish kinetics and large volume expansion. Herein, N/S co-doped carbon nanocapsule (NSCN) is constructed for superior K+ storage. The NSCN possesses 3D nanocapsule framework with abundant meso/macropores, which guarantees structural robustness and accelerates ions/electrons transportation. The high-level N/S co-doping in carbon matrix not only generates ample defects and active sites for K+ adsorption, but also expands interlayer distance for facile K+ intercalation/deintercalation. As a result, the NSCN electrode delivers a high reversible capacity (408 mAh g^(−1) at 0.05 A g^(−1)), outstanding rate capability (149 mAh g^(−1) at 5 A g^(−1)) and favorable cycle stability (150m Ah g^(−1) at 2 A g^(−1) after 2000 cycles). Ex situ TEM, Raman and XPS measurements demonstrate the excellent stability and reversibility of NSCN electrode during potassiation/depotassiation process. This work provides inspiration for the optimization of energy storage materials by structure and doping engineering. | Honghui Bi Xiaojun He Lei Yang Hongqiang Li Biyu Jin Jieshan Qiu | 2022 | Journal of Energy Chemistry2022，31，3： | 4 |
| 7 | Six sigma robust design optimization for thermal protection system of hypersonic vehicles based on successive response surface method显示文摘Lightweight design is important for the Thermal Protection System(TPS) of hypersonic vehicles in that it protects the inner structure from severe heating environment. However, due to the existence of uncertainties in material properties and geometry, it is imperative to incorporate uncertainty analysis into the design optimization to obtain reliable results. In this paper, a six sigma robust design optimization based on Successive Response Surface Method(SRSM) is established for the TPS to improve the reliability and robustness with considering the uncertainties. The uncertain parameters related to material properties and thicknesses of insulation layers are considered and characterized by random variables following normal distributions. By employing SRSM, the values of objective function and constraints are approximated by the response surfaces to reduce computational cost. The optimization is an iterative process with response surfaces updating to find the true optimal solution. The optimization of the nose cone of hypersonic vehicle cabin is provided as an example to illustrate the feasibility and effectiveness of the proposed method. | Jingjing ZHU Xiaojun WANG Haiguo ZHANG Yuwen LI Ruixing WANG Zhiping QIU | 2019 | Chinese Journal of Aeronautics2019，32，9： | 4 |
| 8 | Experimental investigation on active acoustic flutter control显示文摘Experimenial studies on active acoustic fiutter control are carried out successfully in wind-tunnel after the theoretical study The experdrients verify the theory presented in the reference[1] and give valuable experimeotal results which predict a prondsing future of applying new techology and new ideas to the area of vibration induced by flow. | YANG Jun(Institute of Acoustics, Academic Sinica Beijing 100080)(State Key Lab. of Modern Acoustics, Naniing Universitg Naning 210093)HAN Fei QIU Xiaojun and SHA Jiazheng(State Key Lab. of Modern Acoustics, Nanjing Universitg Naning 210093) | 1997 | Chinese Journal of Acoustics1997，16，1： | 3 |
| 9 | Vertex solution theorem for the upper and lower bounds on the dynamic response of structures with uncertain-but-bounded parameters显示文摘The aim of this paper is to evaluate the effects ofuncertain-but-bounded parameters on the dynamic responseof structures. By combining the interval mathematics and thefinite element analysis, the mass matrix, damping matrix,stiffness matrix and the external loads are represented asinterval matrices and vector. With the help of the optimizationtheory, we present the vertex solution theorem fordetermining both the exact upper bounds or maximum valuesand the exact lower bounds or minimum values of thedynamic response of structures, in which these parametersreach their extreme values on the boundary of the intervalmass, damping, stiffness matrices and the interval externalloads vector. Three examples are used to illustrate the computationalaspects of the presented vertex solution theorem. | Zhiping Qiu Xiaojun Wang Institute of Solid Mechanics, Beihang University, 100083 Beijing, China | 2009 | Acta Mechanica Sinica2009，25，3： | 3 |
| 10 | Two-dimensional wideband direction of arrival estimation with acoustic vector-sensor array显示文摘为有一个声学的向量传感器数组的二维的宽带 Direction-of-Arrival (DOA ) 评价的一个靠近形式的算法被介绍。没有数组孔的损失,建议算法能应付协调消息提供者,并且不为 DOA 参数要求一个搜索过程。估计的方位角和举起角度能是自动地, paired.Simulation 结果被介绍表明建议方法的有效性。 | CHEN Huawei QIU Xiaojun ZHAO Junwei | 2006 | Chinese Journal of Acoustics2006，25，1： | 2 |
| 11 | PARALLEL COMPUTING FOR STATIC RESPONSE ANALYSIS OF STRUCTURES WITH UNCERTAIN-BUT-BOUNDED PARAMETERS显示文摘The vertex solution for estimation on the static displacement bounds of structures with uncertain-but-bounded parameters is studied in this paper. For the linear static problem, when there are uncertain interval parameters in the stiffness matrix and the vector of applied forces, the static response may be an interval. Based on the interval operations, the interval solution obtained by the vertex solution is more accurate and more credible than other methods (such as the perturbation method). However, the vertex solution method by traditional serial computing usually needs large computational efforts, especially for large structures. In order to avoid its disadvantages of large calculation and much runtime, its parallel computing which can be used in large-scale computing is presented in this paper. Two kinds of parallel computing algorithms are proposed based on the vertex solution. The parallel computing will solve many interval problems which cannot be resolved by traditional interval analysis methods. | Zhiping Qiu Xiaojun Wang Xu Zhang | 2008 | Acta Mechanica Solida Sinica2008，21，5： | 2 |
| 12 | A modified filtered-x LMS algorithm for active control of periodic noise on-line cancellation path modeling显示文摘 | Qiu Xiaojun Hansen C H | 2000 | Journal of Low Frequency Noise Vibration and Active Control2000，19，1： | 1 |
| 13 | An active impulsenoise control algorithm with logarithmic transformation 显示文摘 | Wu Lifu He Hongsen Qiu Xiaojun | 2011 | IEEE Trans on Audio Speech and Language Processing2011，19，4： | 1 |
| 14 | An active impulsive noise control algorithm with logarithmic transformation显示文摘 | Wu Lifu He Hongsen Qiu Xiaojun | 2011 | IEEE Trans on Audio Speech and language processing2011，19，4： | 1 |
| 15 | Eigenvalue bounds of structures with uncertain-but-bounded parameters显示文摘 | Qiu Zhiping Wang Xiaojun Friswell M I | 2005 | Journal of Sound and Vibration2005，282，12： | 1 |
| 16 | A numer- ical and experimental study on virtual sound barrier显示文摘 | ZOU Haishan QIU Xiaojun NIU Feng | 2007 | Acta Acoustica2007，32，1： | 1 |
| 17 | Comparison of dynamic response of structures with uncertain-but-bounded parameters using non-probabilistic interval analysis method and probabilistic approach显示文摘 | Qiu Zhiping Wang Xiaojun | 2003 | International Journal of Solids and Structures2003，40，20： | 1 |
| 18 | Effect of activation time on the properties of activated carbons pre- pared by microwave-assisted activation for electric double layer capacitors显示文摘 | Xiaojun He Yejing Genga Jieshan Qiu | 2010 | Carbon2010，48，5： | 1 |
| 19 | Solution theorems for the standard eigenvalue problem of structures with uncertain-but- bounded parameters 显示文摘 | Qiu Zhiping Wang Xiaojun | 2005 | Jounal of Sound and Vibration2005，282，： | 1 |
| 20 | An active impulsive noise control algorithm with logarithmic transformation 显示文摘 | Wu Lifu He Hongsen Qiu Xiaojun | 2011 | IEEE Trans on Audio Speech and Language Processing2011，19，4： | 1 |
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