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Effect of land-use and land-cover change on nutrients in soil in Bashang area,China

Journal of Environmental Sciences 2003年第4期15卷 548-553页

作者： SHENG Xue-bin SUN Jian-zhong liu yun-xia Research Center for Eco Environmental Sciences Chinese Academy of SciencesBeijing 100085China.

The Bashang area is a water source area and ecological barrier zone for Beijing and Tianjin. The area is located at 200 km from Beijing and Tianjin and is a typical agriculture pasture interlacing zone, in which the eco environment is vulnerable and hence it is sensitive to environmental change. The area is relatively lagged in social and economic development, where the traditional cultivation mode is predominated in agriculture and animal husbandry, but the disturbance by human activity is relatively small. Therefore, in order to reveal the interrelation between eco environmental change in the area and environmental change in Beijing and Tianjin area, it is fairly necessary to study the effect of land use and land cover change on nutrients in soil in this area. According to the actual situation of changed land use for the limited time period, five series of changed land plots were selected and 4 samples were collected from each series for the study. The samples were collected from different soil forming levels at the same site in different time. Analysis of the collected samples indicates that in the process of change of land use and land cover, the nutrients in soil, such as organic matter, total N, total P, total K, and available N, P, K, and B, Mo, Mn, Zn, Cu, and Fe, have regularly changed. When the land had changed from grassland and non irrigated farmland into woodland, and from non irrigated farmland into irrigated field, the nutrients in soil totally increased. But there exists some exception, i.e. quick acting N, P, K, and some microelements have appeared to be inconsistent with the mentioned above regularity in some cases.

关键词： Bashang area land use change variation of nutrients

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Dimethyl phthalate biodegradation by Dunaliella tertiolecta

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Journal of Environmental Sciences 1998年第3期10卷 41-46页

作者： Yan Hai liu yun xia Research Center for Eco Environmental Sciences Chinese Academy of SciencesBeijing 100085China

unaliella tertiolecta has an ability to biodegrade dimethyl phthalate(DMP) was found in this study, and the average of the biodegradation rates were 113 mg/(L·d) and 305 mg/(L·d), and the average of the phthalic acid (PA) production rates were 15 mg/(L·d) and 36 mg/(L·d), for initial 100 mg/L and 300 mg/L DMP, respectively. The larger amount of accumulation by D. tertiolecta under higher DMP concentration may be responsible for the increase of biodegradation rate, and one of products of DMP biodegradation by D. tertiolecta may be PA. By fitting the process of DMP biodegradation by D. tertiolecta with a kinetic equation newly suggested, the standard deviations between calculated and observed values were 25 mg/L and 57 mg/L, respectively.

关键词： dimethyl phthalate dunaliella tertiolecta biodegradation.

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Environmental change in Bashang Region historical periods

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Journal of Environmental Sciences 2001年第2期13卷 224-227页

作者： SHENG Xue-bin SUN Jian-zhong liu yun-xia FENG Jiang-bin Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China Research Institute of Environmental Conservation Science of Beijing Beijing 100037China

The Bashang region is a typical vulnerable eco-environmental zone. Our analysis of paleodunes, paleosol profiles, and lake changes taking place during last ten thousands years indicated that: (1) 10 - 6.9 ka B. P. was a post-glacial temperature-increasing stage, in which lakes had their high water level; (2) 6.9 - 3.0 ka B. P. was a large warm stage, during which four paleosol layers were developed and climate fluctuation has assumed 4 - 5 small cold-humid and cold-dry alternations. Since 5.4 ka B. P, the lakes tended to gradually shrink; and by 2.1 ka B. P., water level has fallen by 2.7 m; (3) since 3.0 ka B. P. a general trend of the region was to change into a dry, warm-dry and cold-dry environment.

关键词： Bashang region environmental change

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Periodontal Ligament Stem Cells Reverse the High Glucose Level-Induced Inflammatory State of Macrophages

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Biomedical and Environmental Sciences 2022年第7期35卷 674-679页

作者： liu yun xia DING xiao Ling TANG Shuai CUI Shu Yue liu Jia Jia DING Gang School of Stomatology Weifang Medical UniversityWeifang 261053ShandongChina Clinical Competency Training Center Weifang Medical UniversityWeifang 261053ShandongChina

Periodontitis is a chronic infectious disease characterized by plaque biofilm as its main pathogenic factor;its clinical manifestations include gingival inflammation,alveolar bone resorption,attachment loss,and periodontal pocket formation,all of which eventually lead to tooth loss and seriously affect the quality of life of patients[1].This illness has a close relationship with blood sugar levels in patients with diabetes and is one of the most important complications of diabetes[2].Macrophages are an important part of host immune responses and exhibit powerful functions of identifying,phagocytizing,and removing bacteria;macrophage polarization is involved in the pathogenesis of periodontitis[3].

关键词： inflammation removing eventually

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Trends of Oral Cancer Mortality in China from 1990 to 2019 and a 15-Year Predictive Analysis Based on a Bayesian Age-Period-Cohort Model

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Biomedical and Environmental Sciences 2023年第6期36卷 553-556页

作者： GU Jian Chang SONG Ji Wu liu yun WANG xiao Lan XU Shuang Shuang ZHANG Liang Liang liu yun xia DING Gang School of Stomatology Weifang Medical UniversityWeifang 261053ShandongChina Department of Stomatology Weifang People’s HospitalFirst Affiliated Hospital of Weifang Medical UniversityWeifang 261053ShandongChina Department of Dentistry Affiliated Hospital of Weifang Medical UniversityWeifang 261035ShandongChina

Oral cancer is the most common malignant tumor of the head and *** is characterized by high rates of recurrence and distant metastasis and usually has a poor *** advances in cancer diagnosis and treatment,the overall ... 详细信息

关键词： diagnosis cancer Cancer

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Fast Rate Fault Detection Filter for Multirate Sampled-data Systems

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自动化学报 2006年第3期32卷 433-437页

作者： ZHONG Mai-Ying MA Chuan-Feng liu yun-xia School of Control Science and Engineering Shandong University Jinan 250061

This paper focuses on the fast rate fault detection filter (FDF) problem for a class of multirate sampled-data (MSD) systems. A lifting technique is used to convert such an MSD system into a linear time-invariant discrete-time one and an unknown input observer (UIO) is considered as FDF to generate residual. The design of FDF is formulated as an H∞ optimization problem and a solvable condition as well as an optimal solution are derived. The causality of the residual generator can be guaranteed so that the fast rate residual can be implemented via inverse lifting. A numerical example is included to demonstrate the feasibility of the obtained results.

关键词：故障检测滤波器 FDF 残差 MSD系统

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Regulation of mitochondrial carrier SLC25A13 on breast cancer cell cycle in vitro

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上海交通大学学报（医学版） 2019年第8期39卷 848-855页

作者：顾孝平 CHEN Meng-ping LIANG A-juan liu yun-xia SUN Hai-peng 黄莹 Key Laboratory of Cell Differentiation and Apoptosis of National Ministry of Education Department of Pathophysiology Shanghai Jiao Tong University College of Basic Medical Sciences Shanghai 200025 China Center for Reproductive Medicine Tongji Hospital Tongji University School of Medicine Shanghai 200065 China

Objective·To investigate the role of mitochondrial solute carrier family 25 member 13(SLC25A13)on breast cancer ***·SLC25A13 mRNA and protein expressions in invasive breast cancer tissues and normal breast tissues were from The Cancer Genome Atlas(TCGA)breast cancer *** analysis was conducted online by Kaplan-Meier ***-7 cell line was used for in vitro cell *** of SLC25A13 and sirtuin 2(SIRT2)were conducted by siRNA *** viability was measured with trypan blue *** cycle arrest was determined by flow *** mRNA expression of SLC25A13 and P27 were detected by quantitative *** protein level of SLC25A13,P27 and SIRT2 were detected by Western *** half-life of P27 was assessed by Western blotting after cycloheximide ***·SLC25A13 was up-regulated in invasive breast cancer *** expression of SLC25A13 correlated with poor overall survival and breast cancer ***25A13 knockdown inhibited MCF-7 cell cycle progression.P27 and SIRT2 both accumulated after SLC25A13 knockdown.P27 accumulation resulted from prolonged protein *** of SIRT2 restored cell cycle arrest as well as P27 accumulation caused by SLC25A13 ***·High expression of SLC25A13 may promote cell cycle progression via SIRT2 in breast cancer development.

关键词： solute carrier family 25 member 13(SLC25A13) sirtuin-2(SIRT2) P27 breast cancer cell cycle

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基于非线性约束的局部投影降噪

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电子与信息学报 2009年第2期31卷 400-404页

作者：韩敏刘云侠大连理工大学电子与信息工程学院大连116023

基于相空间重构理论,该文提出了一种改进的混沌时序降噪方法。首先利用递归图对实际观测的时间序列进行混沌特性分析,然后将非线性约束条件引入局部投影方法之中,并在局部邻域内进行奇异谱(SSA)分析,利用代表吸引子的主分量来重构时间... 详细信息

基于相空间重构理论,该文提出了一种改进的混沌时序降噪方法。首先利用递归图对实际观测的时间序列进行混沌特性分析,然后将非线性约束条件引入局部投影方法之中,并在局部邻域内进行奇异谱(SSA)分析,利用代表吸引子的主分量来重构时间序列。该算法克服了传统局部投影方法不能充分刻画系统内在非线性关系的问题,减小了重构误差,提高了系统的信噪比。通过对Lorenz模型和太阳黑子混沌时间序列进行仿真分析,证实了该文算法对实际观测混沌时序降噪的有效性。

关键词：混沌时间序列局部投影非线性约束奇异谱分析递归图

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基于等价空间的的多速率数据采样系统快速残差的产生

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控制理论与应用 2008年第6期25卷 1059-1062页

作者：刘云霞钟麦英深圳信息职业技术学院软件工程系广东深圳518029 山东大学控制科学与工程学院山东济南250061

研究一类多速率数据采样系统基于等价空间的快速残差产生问题.首先应用一种提升技术,建立多速率数据采样系统的线性时不变提升模型,并以提升模型为基础将基于等价空间的残差产生器设计问题归结为最小化问题.然后,利用该最小化问题解不... 详细信息

研究一类多速率数据采样系统基于等价空间的快速残差产生问题.首先应用一种提升技术,建立多速率数据采样系统的线性时不变提升模型,并以提升模型为基础将基于等价空间的残差产生器设计问题归结为最小化问题.然后,利用该最小化问题解不唯一的特点,求得满足因果关系的最优残差产生器.进一步,应用逆提升技术实现残差产生同步于测量输出采样的快速化.算例验证了所提方法的有效性.

关键词：故障检测等价空间残差产生多速率数据采样系统

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基于等价空间的网络控制系统故障检测问题研究

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系统工程与电子技术 2006年第10期28卷 1553-1555,1605页

作者：刘云霞钟麦英山东大学控制科学与工程学院山东济南250061

研究了网络控制系统的故障检测问题。对于一类网络时延为不确定情况的网络控制系统,得到了系统的具有模型不确定性的离散时间模型。将等价空间故障检测方法中的等价向量扩展为等价矩阵的情况,进而可将残差产生器的设计问题归结为受线性... 详细信息

研究了网络控制系统的故障检测问题。对于一类网络时延为不确定情况的网络控制系统,得到了系统的具有模型不确定性的离散时间模型。将等价空间故障检测方法中的等价向量扩展为等价矩阵的情况,进而可将残差产生器的设计问题归结为受线性矩阵不等式约束的多目标优化问题,并可应用线性矩阵不等式技术求解等价矩阵。同时还讨论了对残差评估问题。算例验证了提出方法的有效性。

关键词：故障检测网络控制系统等价空间线性矩阵不等式

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