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Derivations of the Even Part of the Odd Hamiltonian Superalgebra in Modular Case

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Acta Mathematica Sinica,English Series 2009年第3期25卷 355-378页

作者： Wen De LIU Xiu ying hua Yu Cai SU School of Mathematical Sciences Harbin Normal University Harbin 150025 P. R. China Department of Applied Mathematics Harbin University of Science and Technology Harbin 150080 P. R. China Department of Mathematics University of Science and Technology of China Hefei 230026 P. R. China

In this paper we mainly study the derivations for even part of the finite-dimensional odd Hamiltonian superalgebra HO over a field of prime characteristic. We first give the generating set of the even part g of HO. Then we compute the derivations from g into the even part m of the generalized Witt superalgebra. Finally, we determine the derivation algebra and outer derivation algebra of and the dimension formulas. In particular, the first cohomology groups H^1（g;m） and H^1（g;g） are determined.

关键词： canonical torus derivation space first cohomology group

Sensitivity of key factors and uncertainties in health risk assessment of benzene pollutant

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Journal of Environmental Sciences 2007年第10期19卷 1272-1280页

作者： LIU Zhi-quan ZHANG ying-hua LI Guang-he ZHANG Xu Department of Environmental Science and Engineering Tsinghua University Beijing 100084 China

Predicting long-term potential human health risks from contaminants in the multimedia environment requires the use of models. However, there is uncertainty associated with these predictions of many parameters which can be represented by ranges or probability distributions rather than single value. Based on a case study with information from an actual site contaminated with benzene, this study describes the application of MMSOILS model to predict health risk and distributions of those predictions generated using Monte Carlo techniques. A sensitivity analysis was performed to evaluate which of the random variables are most important in producing the predicted distributions of health risks. The sensitivity analysis shows that the predicted distributions can be accurately reproduced using a small subset of the random variables. The practical implication of this analysis is the ability to distinguish between important versus unimportant random variables in terms of their sensitivity to selected endpoints. This directly translates into a reduction in data collection and modeling effort. It was demonstrated that how correlation coefficient could be used to evaluate contributions to overall uncertainty from each parameter. The integrated uncertainty analysis shows that although drinking groundwater risk is similar with inhalation air risk, uncertainties of total risk come dominantly from drinking groundwater route. Most percent of the variance of total risk comes from four random variables.

关键词： Monte Carlo sensitivity uncertainty MMSOILS models risk assessment

Three-dimensional flow field simulation of steady flow in the serrated diffusers and nozzles of valveless micro-pumps

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Journal of Hydrodynamics 2019年第2期31卷 413-420页

作者： ying-hua Xu Wei-ping Yan Kai-rong Qin Tun Cao School of Energy and Power Engineering Dalian University of TechnologyDalian 116024China School of Optoelectronic Engineering and Instrumentation Science Dalian University of TechnologyDalian 116024China

This paper presents a three-dimensional flow field simulation of the steady flows through diffusers and nozzles with straight or serrated-sided walls to analyze the effect of the channel structure on the flow *** pressure and velocity profiles in the diffusers and the nozzles as well as the net volumetric flow rate are *** simulation demonstrates that the pressure and velocity profiles in the serrated diffuser/nozzles are more complicated than those with the straight-sided wall,while the net steady flow rate with the straight-sided wall increases monotonically with the increase of the pressure difference,the steady flow rate with serrated sided walls increases gradually to reach a maximum and then decreases with the increase of the pressure *** results suggest that the number of the sawteeth plays a significant role in optimizing the design of serrated diffusers and nozzles for improving the transport efficiency of valveless micro-pumps.

关键词： Valveless micro-pump steady flow diffuser and nozzle serrated-sided wall three-dimensional flow field simulation

Controlling of entropic uncertainty in open quantum system via proper placement of quantum register

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Chinese Physics B 2018年第10期27卷 159-167页

作者： ying-hua Ji Qiang Ke Ju-Ju Hu College of Physics and Communication Electronics Jiangxi Normal University Nanchang 330022 China Key Laboratory of Photoelectronics and Telecommunication of Jiangxi Province Nanchang 330022 China

We investigate the dynamical behaviors of quantum-memory-assisted entropic uncertainty and its lower bound in the amplitude-damping channel. The influences of different placement positions of the quantum register on the dynamics of quantum coherence, quantum entanglement, and quantum discord are analyzed in detail. The numerical simulation results show that the quantum register should be placed in the channel of the non-Markovian effect. This option is beneficial to reduce the entropic uncertainty and its lower bound. We also find that this choice does not change the evolution of the quantum coherence and quantum entanglement, but changes the dynamical process of the quantum discord of the *** results show that quantum coherence, quantum entanglement, and quantum discord are different quantum resources with unique characteristics and properties, and quantum discord can play a key role in reducing the uncertainty of quantum systems.

关键词： quantum-memory-assisted entropic uncertainties quantum register open quantum system

2021年我国城乡居民健康素养水平及其影响因素研究

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中国健康教育 2024年第5期40卷 387-391,400页

作者：张刚李英华李莉王兰兰徼晓菲中国健康教育中心北京100011

目的分析2021年我国城乡居民健康素养水平及其影响因素,为今后开展健康教育干预工作、制定相关卫生健康政策提供科学依据。方法2021年1—10月,采用多阶段分层整群概率抽样方法抽取全国15~69岁城乡居民进行问卷调查。采用二元Logistic回... 详细信息

目的分析2021年我国城乡居民健康素养水平及其影响因素,为今后开展健康教育干预工作、制定相关卫生健康政策提供科学依据。方法2021年1—10月,采用多阶段分层整群概率抽样方法抽取全国15~69岁城乡居民进行问卷调查。采用二元Logistic回归模型分析影响居民健康素养水平的主要因素。结果经加权调整后,2021年城市居民和农村居民健康素养水平分别为30.70%和22.02%。多因素Logistic回归分析结果显示:城市居民方面,以西部地区为参照,东部地区居民健康素养水平的OR值为1.372(95%CI:1.244~1.512);以15~24岁年龄段为参照,35~44岁年龄段居民健康素养水平的OR值为1.367(95%CI:1.140~1.640),65~69岁年龄段居民健康素养水平OR值为0.687(95%CI:0.553~0.854);以小学及以下文化程度为参照,初中、高中/职高/中专、大专及以上文化程度居民健康素养水平的OR值分别为1.849(95%CI:1.581~2.163)、3.471(95%CI:2.958~4.073)、7.564(95%CI:6.472~8.841)。农村居民方面,以西部地区为参照,东、中部地区居民健康素养水平OR值分别为1.595(95%CI:1.434~1.774)、1.587(95%CI:1.374~1.833);以15~24岁年龄段为参照,35~44岁年龄段居民健康素养水平OR值为1.546(95%CI:1.234~1.936),65~69岁年龄段居民健康素养水平的OR值为0.770(95%CI:0.598~0.993);以小学及以下文化程度为参照,初中、高中/职高/中专、大专及以上文化程度居民健康素养水平OR值分别为2.390(95%CI:2.139~2.669)、5.235(95%CI:4.548~6.025)、12.816(95%CI:10.926~15.033)。结论2021年我国城乡居民的健康素养水平均有进一步提升,但仍有较大上升空间,不同地区、年龄和文化程度对城乡居民健康素养的影响程度不同。

关键词：城乡居民健康素养监测影响因素

中国热带和北方地区稳定期支气管扩张症患者下呼吸道背景微生物分析

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中华医院感染学杂志 2024年第10期34卷 1468-1472页

作者：高秉睿陈海燕郭英华解立新解放军总医院海南医院呼吸与危重症医学科海南三亚572000 解放军总医院海南医院全科医学科海南三亚572000 解放军总医院呼吸与危重症医学科北京100089 解放军总医院第八医学中心呼吸与危重症医学科北京100089

目的研究不同地域支气管扩张症(简称支扩)患者下呼吸道背景微生物差异。方法收集2021年9月-2022年9月解放军总医院海南医院及解放军总医院第八医学中心收治的稳定期支扩患者75例的肺泡灌洗液进行宏基因组测序,并对结果进行对比分析。结... 详细信息

目的研究不同地域支气管扩张症(简称支扩)患者下呼吸道背景微生物差异。方法收集2021年9月-2022年9月解放军总医院海南医院及解放军总医院第八医学中心收治的稳定期支扩患者75例的肺泡灌洗液进行宏基因组测序,并对结果进行对比分析。结果南、北支扩患者下呼吸道丰度最高的菌属是普氏菌属、奈瑟菌属和罗斯氏菌属,菌种是产黑色普雷沃菌、中间普雷沃菌和龋齿罗氏菌;不同地域支扩患者下呼吸道背景微生物存在差异,北方组丰度最高的菌属是普氏菌属、奈瑟菌属和罗斯氏菌属,菌种是产黑色普雷沃菌、黏滑罗氏菌和龋齿罗氏菌;南方组丰度最高的菌属是普氏菌属、奈瑟菌属和罗斯氏菌属,菌种是中间普雷沃菌、产黑色普雷沃菌和龋齿罗氏菌;以铜绿假单胞菌和流感嗜血杆菌为致病菌的背景菌群其α多样性无统计学差异。结论我国南北方稳定期支扩患者下呼吸道背景微生物存在差异,北方组产黑色普雷沃菌、黏滑罗氏菌、龋齿罗氏菌多见,南方组中间普雷沃菌、产黑色普雷沃菌、龋齿罗氏菌多见,该研究对支扩的治疗提供新思路。

关键词：支气管扩张症下呼吸道菌群宏基因组测序微生态

Compute extremely low-frequency electromagnetic field exposure by 3-D impendance method

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The Journal of China Universities of Posts and Telecommunications 2007年第3期14卷 113-116页

作者： HAN Yu-nan LV ying-hua ZHANG Hong-xin Beijing University of Posts and Telecommunications Beijing 100876 ChinaAerospace Science and Technology Group Beijng 100076 China

A 3-D impedance method has been introduced to compute the electric currents induced in a human body exposed to extremely low-frequency electromagnetic field. The 3-D impedance method has been deduced from Maxwell equations and is put into the computation and simulation effectively to the visible human body model, which has 196×114×626 cells and more than 40 types of tissues. As the result, two representative cases are investigated. One is exposure of the human body to 100 μT （1 000 mG）, the limit recommended by the International Commission on Non-Ionizing Radiation Protection for the public and the other one is the exposure of human body to 0.4 laT （4 mG）, the level at which a statistical link appears with a doubled risk of development of childhood leukaemia. The distribution of induced current density can be obtained and the maximum of induced current are found to be 16 mA/m^2 and 0.07 mA/m^2.

关键词： 3-D impedance method induced current magnetic flux density visible human body model extremely low frequency (ELF)

Euclidean distance harmonic method for establishing theoretical MAPK/Erk signaling pathway in treated breast cancer line MCF-7

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The Journal of China Universities of Posts and Telecommunications 2007年第1期14卷 80-84页

作者： ZHANG Hong-xin LU ying-hua ZHANG Jin-ling School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

Hierarchical clustering algorithms, such as Pearson＇s correlation, Euclidean distance, Euclidean distance harmonic, Spearman rank correlation, Kendall＇s tau, and City-block distance, were used to find the best way to establish theoretical MAPK/Erk signaling pathway on the basis of breast cancer line MCF-7 gene expressions. The algorithm constructs a hierarchy from top to bottom on the basis of a self-organizing tree. It dynamically finds the number of clusters at each level. It was found that only Euclidean distance harmonic is fit for the analysis of the cascade composed from a RAF1 （c-Raf）, a MKNK1, a MAPKK （MEK1/2） to MAPK （Erk） in breast cancer line MCF-7. The result is consistent with the biological experimental MAP/Erk signaling pathway, and the theoretical MAPK/Erk signaling pathway on breast cancer line MCF-7 is set up.

关键词： hierarchical clustering signaling pathway,Euclidean distance harmonic

Induction of Somatic Embryos in Arabidopsis Requires Local YUCCA Expression Mediated by the Down-Regulation of Ethylene Biosynthesis

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Molecular Plant 2013年第4期6卷 1247-1260页

作者： Bo Bai ying hua Su Jia Yuan Xian Sheng Zhang State Key Laboratory of Crop Biology College of Life Sciences Shandong Agricultural University Taian Shandong 271018 China

Somatic embryogenesis is an important experimental model for studying cellular and molecular mechanisms of early embryo development. Although it has long been known that removal of exogenous auxin from medium results in somatic embryogenesis, the mechanisms underlying the initiation of somatic embryos （SEs） are poorly understood. In this study, we showed that YUCCAs （YUCs） encoding key enzymes in auxin biosynthesis are required for SE induction in Arabidopsis. To identify other factors mediating SE initiation, we performed transcriptional profiling and gene expres- sion analysis. The results showed that genes involved in ethylene biosynthesis and its responses were down-regulated during SE initiation. Ethylene level decreased progressively during SE initiation, whereas treatment with the metabolic precursor of ethylene, 1-aminocyclopropane-l-carboxylic acid （ACC）, or mutation of ETHYLENE-OVERPRODUCTION1 （ET01） disrupted SE induction, suggesting that ethylene plays a role in this process. Suppression of SE induction was also observed in the constitutive triple response 1 （ctrl） mutant, in which ethylene signaling was enhanced. These results indicate that down-regulation of not only ethylene biosynthesis, but also ethylene response is critical for SE induction. We further showed that ethylene disturbed SE initiation through inhibiting YUC expression that might be involved in local auxin biosynthesis and subsequent auxin distribution. Our results provide new information on the mechanisms of hormone-regulated SE initiation.

关键词： YUC genes auxin biosynthesis auxin distribution ethylene somatic embryo induction Arabidopsis