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Bio-geomorphologic features and growth process of Tamarix nabkhas in Hotan River Basin, Xinjiang

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Journal of Geographical Sciences 2010年第2期20卷 205-218页

作者： LI Zhizhong WU Shengli chen shujiang chen Xiuling JIN Jianhui LIU QI College of Geographical Science Fujian Normal University Fuzhou 350007 China College of Geography Science and Tourism Xinjiang Normal University Urumqi 830054 China

Tamarix nabkha is one of the most widespread nabkhas, distributing in the arid region of China. Based on the observations outdoors and the simulation experiments in laboratories, analysis in this paper refers to the biological geomorphologic features and growth process of Tamarix nabkhas in the middle and lower reaches of the Hotan River, Xinjiang. And the results indicate that the ecological type of Tamarix in the study area is a kind of Tugaic soil habitat based on the deep soil of the Populus Diversifolia forests and shrubs. This type of habitat can be divided into three kinds of sub-habitats which demonstrate the features of ecological environment of Tamarix nabkhas during the differential developed phases. Meanwhile, the Tamar, ix nabkha can exert intensified disturbance current on wind-sand flow on the ground,and its root and stems not only have strong potential of sprouting but are characteristic of wind erosion-tolerance, resistance to be buried by sand and respectively tough rigid of the lignified branches, for it has a rather longer life-time. Thus, the wind speed profile influenced by the Tamarix nabkha is different from the Phragmites nabkha and Alhagi nabkha. And the structure of the wind flow is beneficial to aeolian sand accumulating in/around Tamarix shrub, which can create unique Tamarix nabkhas with higher average gradient and longer periodicity of life. Tamarix nabkha evolution in the area experienced three stages： growth stage, mature and steady stage and withering stage. In each stage, morphological features and geomorphic process of Tamarix nabkha are different due to the discrep- ant interaction between the nabkha and aeolian sand flow.

关键词： Tamarix Nabkha biological geomorphology development mechanism Hotan River Basin Xinjiang

Analysis of Fixed Site Leveling Abnormality at Hutubi Seismic Station

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Earthquake Research in China 2016年第4期30卷 601-611页

作者： chen shujiang Zheng Yiming Wang Zaihua Wang Jianfeng Ailixiati·Yushan chen Li cheng Ruizhong Fang Wei Earthquake Administration of Xinjiang Uygur Autonomous Region Urumqi 830011China Hutubi Seismic Station of Xinjiang Uygur Autonomous Region Hutubi 831200XinjiangChina

On the basis of the comparison data of Stage II of the tunnel site leveling project at Hutubi seismic station and the observation data of Stage IV of the site cross fault leveling project at Hutubi and the level observation data from the cross fault survey lines in Dafeng from 1987 to 2012,this paper analyses the variation rates of the tunnel site leveling observation results and the difference of annual change rates of the cross fault level observations at Hongshan seismic station in Hutubi. This paper concludes the reliability of the Ni004 optical level used by the station and puts forward a proposal based on the analysis. This paper also explores the cross fault leveling research on the ground deformation in the region concerned on the basis of the historical observation of the cross fault level at Dafeng and the comparison results of the tunnel site leveling observation in Hutubi.

关键词： Hutubi Cross fault leveling Vertical displacement Mutual difference Tectonic unit

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嵌入控制油腔的静压滑动轴承可控性研究

北京理工大学学报 2021年第10期41卷 1034-1042页

作者：陈淑江孙嘉珩山东大学机械工程学院高效洁净机械制造教育部重点实验室山东济南250061

针对主动控制静压轴承转子运动的可控性和稳定性有待提高的问题,提出了一种在传统静压轴承的油腔内嵌入控制油腔的轴承结构,并采用主动单面薄膜节流器对其供油,充分利用轴承内部的二次节流,以此提高静压轴承的主动控制性能.基于雷诺润... 详细信息

针对主动控制静压轴承转子运动的可控性和稳定性有待提高的问题,提出了一种在传统静压轴承的油腔内嵌入控制油腔的轴承结构,并采用主动单面薄膜节流器对其供油,充分利用轴承内部的二次节流,以此提高静压轴承的主动控制性能.基于雷诺润滑方程和流量守恒方程,采用有限差分法和欧拉迭代法建立了静压主轴的轴心运动计算模型,研究了不同轴承结构和进油压力下轴承的动态特性和控制特性.结果表明:当控制腔面积占比在30%,封油边宽度为5 mm时,静压轴承同时具有良好的动态特性和控制特性.通过合适的结构设计,嵌入控制油腔的轴承结构可以提高静压主轴轴心运动的可控性.

关键词：液体静压轴承控制油腔控制特性动态特性轴心运动

Research on Coupling Relationship between Social Economy and Ecological Environment in Jinghe County of Aiby Lake Basin,Xinjiang

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Meteorological and Environmental Research 2014年第11期5卷 38-41,45页

作者： Lai Fengbing Sun Hu chen shujiang Ren Shuang College of Geography and Tourism Xinjiang Normal University College of Tourism and Environment Science Shaanxi Normal University Management Bureau of Aiby Lake Wetland Nature Reserve of Xinjiang

Based on the theory of sustainable development,using the theory and method of coupling relationship,the main city of Aiby Lake basin——Jinghe County in Xinjiang is selected. Based on the analyses of natural condition,population growth,land use type and ecological environment,the comprehensive evaluation index systems of socio-economic development level and eco-environment quality in Jinghe County are constructed. Using principal component analysis,a comprehensive evaluation of socio-economic development level and ecological environment quality in Jinghe County is conducted by combining with Excel. Their coupling relationship is studied,and quantitative coordination degree between social economy and ecological environment in Jinghe County is obtained. The results show that in recent 50 years,socio-economic development level in Jinghe County is rising,but the ecological environment quality is falling. Their coupling degree C changes during [- 1. 260, ＋ 0. 482],in other words,their coupling relationship is changing between ＂ reluctant coordination＂ and ＂ not coordination＂. After entering into the 21 stcentury,their coupling relationship is basically ＂ reluctant coordination＂. On this basis,the existing problems in the process of sustainable development in Jinghe County are analyzed,and the suggestions about promoting coordinated development between social economy and ecological environment are put forward.

关键词： Social economy Ecological environment Coupling relationship Jinghe County China

Dynamic analysis and evaluation of Xinjiang forest resources:based on RS and GIS

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Journal of Geographical Sciences 2005年第3期15卷 346-352页

作者： LI Hu WANG Xiaofen chen shujiang HOU Ping Department of Geography Fujian Normal University Fuzhou350007 China Department of Geography Xinjiang Normal University Urumqi 830054 China Department of Environmental Science Xinjiang Agricultural University Urumqi 830052China

The forest resources in Xinjiang were surveyed and analyzed based on RS and GIS. Satellite data interpretation was adopted to obtain the general situation of Xinjiang forest resources in assistance with the sampling method and on-the-spot investigations. Based on GIS, related data obtained from satellite remote sensing in 1996 and 2001 were studied through contrastive analysis. Moreover, the dynamic variation of Xinjiang forest resources was studied in an all-around way. In the past five years, the areas of the forestland, woodland, sparse woodland, nursery garden and the land usable for forestry in Xinjiang kept growing, moreover, the forest cover rate and the total standing stock volume increased correspondingly, showing that the wooded area and the amount of growing stock in Xinjiang were increasing. The forestland area in Xinjiang went up to 17,837 km^2 from 17,331 km^2, with an annual average increase of 101 km^2. Accordingly, the forest vegetation came to 1.08% from 1.05%, up 0.03 percentage point; the total standing stock volume went up to 289,985,200 m^3 from 262,416,000 m^3, a total increase of 27,569,200 m^3, an annual average increase of 5,514,000 m^3 and an annual average net growth rate of 2.00%. The analysis results showed that the forest resources in Xinjiang were increasing on the whole, however, there remained some problems, such as the sparse natural forests, low forest cover rate, imbalanced wood age structure, and mono tree species composition, etc.

关键词： Xinjiang forest resources development variety RS and GIS

Research on Co-seismic Displacement of the Yutian MS7.3 Earthquake Based on the High Frequency Data of GNSS

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Earthquake Research in China 2016年第4期30卷 594-600页

作者： Li Guirong Buaijieer·Kuerban Zhao Bin Li Rui Li Jie cheng Ruizhong Wang Xiaoqiang Liu Daiqin chen Li Paerhat·Zainula Ailixiati·Yushan chen shujiang Earthquake Administration of Xinjiang Uygur Autonomous Region Urumqi 830011China Earthquake Administration of Hubei Province Wuhan 430071China

After the Yutian M_S7.3 earthquake,the authors instantly collected 1Hz high frequency data of the 4 reference stations within 350 km around the epicenter,and calculated the GNSS data with the TRACK module. The results showed that:( 1) The co-seismic displacement of Yutian station,about 54 km from the epicenter,is the most obvious,particularly in the EW component,with a change of about 52.5 ± 11mm,which is more than three times the mean-square error of calculating precision.( 2) In the Yutian reference station,the biggest variation in the EW component appeared within 1 minute after the earthquake.( 3) The change in the NS component is not great.

关键词： High-frequency GNSS Yutian Ms7. 3 earthquake Co-seismic displacement

Mechanism of Surface Vertical Deformation in Parts of the Underground Gas Storage Reservoir of Hutubi, Xinjiang, China

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Earthquake Research in China 2016年第3期30卷 451-463页

作者： Li Jie Li Rui Wang Xiaoqiang Shi Xinpu Qiao Xuejun Zheng Liming Abudutayier. Yaseng Sun Xiaoxu chen shujiang Fang Wei cheng Ruizhong Earthquake Administration of Xinjiang Uygur Autonomous Region Urumqi 830011 China Xinjiang Petroleum Administration Karamay 831100 Xinjiang China Institute of Seismology China Earthquake Administration Wuhan 430071 China

The Underground Gas Storage( UGS) in Hutubi( HTB),Xinjiang is the largest gas storage reservoir in China and it has significance for coordinating the gas supply and demand relationship,peak-load regulation,implementation of strategic reserves,national security, and social economic sustainable development. Therefore, the deformation monitoring and simulation analysis of UGS operation has important technical support and reference value for the stability and safe operation of the underground gas storage. In this paper,we use the elevation data obtained from 7 periods of second-order leveling surveys in the Hutubi underground gas storage area in 2013- 2015 to analyze the influence of gas well pressure on the vertical deformation of the underground gas storage *** has shown that the absolute vertical subsidence rate is approximately in the range from 11. 8mm to 16. 1mm and the relative subsidence change is about 4. 3mm,near the surface deformation of Hutubi underground gas storage area except for the annual subsidence rate of- 2. 86 mm by the basic influence of uplift of the Tianshan *** over-extraction in the Hutubi area also has an impact on the vertical variation of the surface in this region. The land surface change per unit pressure of gas storage has an impact of about 0. 625mm- 1. 125 mm. 17 scenes Terra SAR-X radar images acquired from August,2013 to August,2014 are exploited by Small Baseline Subset( SBAS) In SAR method to obtain the surface deformation time series during the operation of UGS in Hutubi,meanwhile combined with the pressure data of injection / productionwells,the multi-point source Mogi model is used to simulate the UGS deformation field in Hutubi. The results show that the deformation characteristics of the whole UGS area is a discontinuous distribution with the peak deformation value of 10 mm and- 8mm in the satellite line of sight( LOS) during gas injection and production,respectively and the retrieved deformati

关键词： Underground gas storage Vertical deformation Gas well pressure change Leveling survey Small Baseline Subset(SBAS) InSAR Mogi Model Crustal deformation

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如何做好“用油膜法估测分子的大小”实验

物理实验 2002年第7期22卷 32-33页

作者：陈征燕椒江第一中学浙江椒江318000

介绍了“用油膜法估测分子的大小”实验的准备工作及对学生进行正确实验指导的方法 .

关键词：估测油膜法分子直径测量物理实验实验教学

重度混合动力汽车油耗和排放的多目标随机最优控制策略

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汽车工程 2014年第8期36卷 923-928,949页

作者：隗寒冰秦大同陈淑江重庆大学机械传动国家重点实验室重庆400044 重庆交通大学机电与汽车工程学院重庆400074

鉴于采用通常在特定工况下开发的控制策略的混合动力汽车在实际路况下的性能未必能达到最优的问题,将实际道路下的混合动力汽车能量管理策略问题转化为标准路况下的随机线性最优控制问题。建立了包含三效催化转化器热状态的混合动力汽... 详细信息

鉴于采用通常在特定工况下开发的控制策略的混合动力汽车在实际路况下的性能未必能达到最优的问题,将实际道路下的混合动力汽车能量管理策略问题转化为标准路况下的随机线性最优控制问题。建立了包含三效催化转化器热状态的混合动力汽车二次型状态空间方程,以发动机燃油消耗和三效催化转化器出口处的排放最小为优化目标,对蓄电池SOC、车速、三效催化转化器温度和出口排放等实际状态进行卡尔曼滤波估计,以对电机功率和发动机功率等输出变量进行最优反馈。仿真结果表明,与规则控制相比,所建立的随机最优控制策略能在满足车辆动力性要求的前提下,三效催化转化器的起燃时间约缩短160s,HC和CO的转化率明显提高。

关键词：混合动力汽车油耗排放线性二次型高斯最优控制三效催化转化器