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The Simulation of High Reynolds Number Cavity Flow Based on Fractional Volumetric Lattice Boltzmann Method

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Journal of shanghai Jiaotong university(Science) 2005年第4期10卷 373-376页

作者： han shan-ling（韩善灵） zhu ping（朱平） lin zhong-qin（林忠钦） School of Mechanical Eng. Shanghai Jiaotong Univ. Shanghai 200030 China

The fractional volumetric lattice Boltzmann method with much better stability was used to simulate two-chmensional cavity flows. Because the effective viscosity was reduced by the fraction factor, it is very effective for simulating high Reynolds number flows. Simulations were carried out on a uniform grids system. The stream lines and the velocity profiles obtained from the simulations agree well with the standard lattice Boltzmann method simulations. Comparisons of detailed flow patterns with other studies via location of vortex centers are also satisfactory.

关键词： lattice Boltzmann method cavity flow fraction factor high Reynolds number flow

基于SMAA-GTDM的水库调度风险型群决策模型

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中国农村水利水电 2025年第2期 106-113页

作者：王雅琴孔祥意朱非林朱冰韩明宇钟平安河海大学水文水资源学院江苏南京210098 水利部信息中心北京100053

随机环境下的水库多目标优化调度结果是一组具有不确定性的非劣解集,传统的确定性决策方法难以定量考虑水库调度决策过程中的综合不确定性因素和风险。若按确定性决策结果进行调度,会给水库实际调度带来风险。为应对不确定性因素对水库... 详细信息

随机环境下的水库多目标优化调度结果是一组具有不确定性的非劣解集,传统的确定性决策方法难以定量考虑水库调度决策过程中的综合不确定性因素和风险。若按确定性决策结果进行调度,会给水库实际调度带来风险。为应对不确定性因素对水库调度决策问题的影响,减小随机环境下水库调度决策的风险,提出了一种考虑多重不确定性的水库调度风险型群决策模型。首先,采用概率分布量化了决策指标的不确定性。然后,提出了基于熵权法、模糊层次分析法、博弈论和偏差最小准则的决策群体偏好冲突消解和赋权方法,采用可行权重空间推求指标权重可行域。最后,建立了基于SMAA-GTDM的水库调度风险型群决策模型,提出了风险型群决策的两阶段流程,并定义了决策风险度指标对决策结果进行可靠性评估。以大渡河流域瀑布沟水库防洪调度为实际案例,与确定性GTDM模型做了对比分析,论证了SMAA-GTDM风险型群决策模型及其两阶段决策流程在处理风险决策问题方面的可行性和优越性。进一步与原始的SMAA-2模型开展对比验证,结果表明,两个模型结果中综合排序最优方案获得最优排序的概率分别为68.95%、45.61%,置信因子分别为69.1%、46.22%,决策风险度分别为0.04%、1.55%,说明SMAA-GTDM模型能在随机环境下提供更明确的排序结果,显著减小决策风险,可为水库调度提供更为稳健的决策支撑。

关键词：水库调度风险型群决策随机多准则可接受性分析理论灰靶决策组合赋权决策可靠性

Integrative square-grid triboelectric nanogenerator as a vibrational energy harvester and impulsive force sensor

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Nano Research 2018年第2期11卷 1157-1164页

作者： Chuan He Weijun zhu Guang qin Gu Tao Jiang liang Xu Bao Dong Chen Chang Bao han Dichen Li zhong lin Wang Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing China CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology (NCNST) Beijing China State Key Laboratory of Manufacturing Systems Engineering Xi’an Jiaotong University Xi’an China Collaborative Innovation Center of High-End Manufacturing Equipment Xi’an Jiaotong University Xi’an China University of Chinese Academy of Sciences Beijing China School of Materials Science and Engineering Georgia Institute of Technology Atlanta USA

A square-grid triboelectric nanogenerator （SG-TENG） is demonstrated for harvesting vibrational energy and sensing impulsive forces. Each square of the three-dimensional （3D）-printed square grid is filled with an aluminum （A1） ball. The grid structure allows the SG-TENG to harvest vibrational energy over a broad bandwidth and operate at different vibrational angles. The most striking feature of the SG-TENG is its ability of being scaled and integrated. After connecting two SG-TENGs in parallel, the open-circuit voltage and short-circuit current are significantly increased over the full vibrational frequency range. Being integrated with a table tennis racket, the SG-TENG can harvest the vibrational energy from hitting a ping pong ball using the racket, where a direct hit by the racket generates an average output voltage of 10,9 ~ 0.6 V and an average output current of 0.09 ± 0.02 boA. Moreover, the SG-TENG integrated into a focus mitt can be used in various combat sports, such as boxing and taekwondo, to monitor the frequency and magnitude of the punches or kicks from boxers and other practitioners. The collected data allow athletes to monitor their status and improve their performance skills. This work demonstrates the enormous potential of the SG-TENG in energy harvesting and sensing applications.

关键词： square grid triboelectric nanogenerator vibration sensor

网格因素对格子Boltzmann方法误差的影响

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上海交通大学学报 2006年第6期40卷 932-935,941页

作者：韩善灵林忠钦朱平上海交通大学机械与动力工程学院

基于外推法的思想,提出了格子Boltzmann方法中的误差计算方法.该方法在粗细两种网格下,采用Filippova提出的分布函数耦合方法推导出误差的计算公式,其主要误差项与格子大小和分布函数中的非平衡态部分成正比.最后用垂直平板障碍绕流作... 详细信息

基于外推法的思想,提出了格子Boltzmann方法中的误差计算方法.该方法在粗细两种网格下,采用Filippova提出的分布函数耦合方法推导出误差的计算公式,其主要误差项与格子大小和分布函数中的非平衡态部分成正比.最后用垂直平板障碍绕流作为一个数值计算实例,验证了理论推导与数值试验结果是一致的.

关键词：格子Boltzmann方法误差估计外推法垂直平板障碍绕流

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侧向气动力对汽车稳态响应的影响

上海交通大学学报 2005年第9期39卷 1445-1448页

作者：韩善灵朱平林忠钦上海交通大学机械与动力工程学院

考虑侧向气动力的影响,建立了简化的二自由度汽车动力学模型,推导了横摆角速度增益与风压中心及汽车外形间的关系,提出了主、次气动稳定性因子的概念,阐明了影响汽车稳态响应的主要因素是主气动稳定性因子,次气动稳定性因子可以忽略不计... 详细信息

考虑侧向气动力的影响,建立了简化的二自由度汽车动力学模型,推导了横摆角速度增益与风压中心及汽车外形间的关系,提出了主、次气动稳定性因子的概念,阐明了影响汽车稳态响应的主要因素是主气动稳定性因子,次气动稳定性因子可以忽略不计.为分析气动力对汽车稳态响应的影响,改善汽车高速行驶稳定性提供了理论依据和简易评价方法.

关键词：汽车空气动力学侧向气动力主气动稳定性因子次气动稳定性因子汽车稳态响应

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道路交通噪声评价及预测新方法

交通运输工程学报 2005年第3期5卷 111-114,121页

作者：韩善灵朱平林忠钦上海交通大学机械与动力工程学院上海200030

在分析既有环境噪声评价方法的基础上,根据交通噪声非稳态性的特点,提出了交通噪声综合影响指数的概念。基于概率论和交通流理论,考虑到影响道路交通噪声的主要因素是车流量、车型和车流速度等,建立了用交通噪声综合影响指数来评价道路... 详细信息

在分析既有环境噪声评价方法的基础上,根据交通噪声非稳态性的特点,提出了交通噪声综合影响指数的概念。基于概率论和交通流理论,考虑到影响道路交通噪声的主要因素是车流量、车型和车流速度等,建立了用交通噪声综合影响指数来评价道路交通噪声的预测理论模型。以某城市道路交通噪声在一天内24 h的A声级变化为实例,计算了其交通噪声综合影响指数为79.7dB。计算结果表明,可以用交通噪声综合影响指数合理地评价道路交通噪声污染对人体健康和社会经济发展的影响。

关键词：交通工程道路交通噪声综合影响指数理论模型交通流理论

DNA Vaccine of SARS-Cov S Gene Induces Antibody Response in Mice

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Acta Biochimica et Biophysica Sinica 2004年第1期36卷 37-41页

作者： ping ZHAO, Jin-shan KE, Zhao-lin qin, Hao REN, Lan-Juan ZHAO, Jian-Guo yu, Jun GAO, shi-Ying zhu, and zhong-Tian QI (Department of Microbiology, Second Military Medical University, shanghai 200433, China Department of Infectious Diseases, PLA Hospital No.88, Tai'an 271000, China ) Department of Microbiology Second Military Medical University Shanghai 200433 China.

The spike (S) protein, a main surface antigen of SARS-coronavirus (SARS-CoV), is one of themost important antigen candidates for vaccine design. In the present study, three fragments of the truncated S protein were expressed in E. coli, and analyzed with pooled sera of convalescence phase of SARS patients. The full length S gene DNA vaccine was constructed and used to immunize BALB/c mice. The mouse serum IgG antibody against SARS-CoV was measured by ELISA with E. coli expressed truncated S protein or SARS-CoV lysate as diagnostic antigen. The results showed that all the three fragments of S protein expressed by E. coli was able to react with sera of SARS patients and the S gene DNA candidate vaccine could induce the production of specific IgG antibody against SARS-CoV efficiently in mice with seroconversion ratio of 75% after 3 times of immunization. These findings lay some foundations for further understanding the immunology of SARS-CoV and developing SARS vaccines.

关键词： severe acute respiratory syndrome-coronavirus (SARS-CoV) spike protein DNA vaccine antibody

More than two hundred and fifty thousand spectroscopic binary or variable star candidates discovered by LAMOST

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Research in Astronomy and Astrophysics 2019年第5期19卷 15-26页

作者： Sheng-Bang Qian Xiang-Dong shi Li-Ying zhu lin-Jia Li Jia Zhang Er-Gang Zhao zhong-Tao han Xiao Zhou Xiao-Hui Fang Wen-ping Liao yunnan Observatories Chinese Academy of Sciences Key Laboratory of the Structure and Evolution of Celestial Objects Chinese Academy of Sciences Center for Astronomical Mega-Science Chinese Academy of Sciences University of Chinese Academy of Sciences

About 786.4 thousand stars were observed by LAMOST twice or more during the first stage of its spectroscopic survey. The radial velocity differences for about 256 thousand targets are larger than10 km s^(-1) and they are possible spectroscopic binary or variable candidates(SBVCs). It is shown that most SBVCs are slightly metal poorer than the Sun. There are two peaks in the temperature distribution of SBVCs around 5760 K and 4870 K, while there are three peaks in the distribution of the gravitational acceleration at 2.461, 4.171 and 4.621 cm s^(-2). The locations of SBVCs on the [Fe/H]-T, [Fe/H]-log g, log g-T and H-R diagrams are investigated. It is found that the detected SBVCs could be classified into four groups. The first group has higher log g～4.621 and lower T ～ 4870 K which are mainly cool red dwarf binaries. The second group of SBVCs has logg around 4.171 cm s^(-2) that includes binaries and pulsating stars such as δSet and γ Dor variables. The gravitational accelerations of the third group of SBVCs are higher and some of them are below the zero-age main sequence. They may be contact binaries in which the primary components are losing energy to the secondaries in the common envelopes and are at a special stellar evolutionary *** last group is composed of giants or supergiants with log g around 2.461 cm s^(-2) that may be evolved pulsating stars. One target(C134624.29+333921.2) is confirmed as an eclipsing binary with a period of 0.65 days. A preliminary analysis suggests that it is a detached binary with a mass ratio of 0.46. The primary fills its critical Roche lobe by about 89%, indicating that mass transfer will occur between the two components.

关键词： stars fundamental parameters-stars binaries spectroscopic-stars:oscillations-stars:binaries eclipsing-stars variables other

Microstructures of GaN Buffer Layers Grown on Si(111) Using Rapic Thermal Process Low-Pressure Metalorganic Chemical Vapor Deposition

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Chinese Physics Letters 2000年第3期17卷 224-226页

作者： CHEN Peng SHEN Bo zhu Jian-Min CHEN Zhi-zhong ZHOU yu-Gang XIE shi-Yong ZhanG Rong han ping GU Shu-lin ZHENG You-Dou JIANG Shu-Sheng FENG Duan Z.C.Huang Department of Physics and Laboratory of Solid State Microstructures Nanjing UniversityNanjing 210093 Raytheon ITSS 4500 Forbes BulivardMD20771USA

Microstructures of GaN buffer layers grown on Si(111)substrates using rapid thermal process low-pressure metalorganic chemical vapor deposition are investigated by an atomic force microscope(AFM)and a high-resolution transmission electron microscope(HBTEM).AFM images show that the islands appear in the GaN buffer layer after annealing at high ***-sectional HBTEM micrographs of the buffer region of these samples indicate that there are bunched steps on the surface of the Si substrate and a lot of domains in GaN misorienting each other with small *** boundaries of those domains locate near the bunched steps,and the regions of the Him on a terrace between steps have the same crystal *** amorphous-like layer,about 3nm thick,can also be observed between the GaN buffer layer and the Si substrate.

关键词： Si(111) temperature GaN