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Integrating space and time: a case for phenological context in grazing studies and management
Dawn M. BROWNING, Sheri SPIEGAL, Richard E. ESTELL, Andres F. CIBILS, Raul H. PEINETTI
《农业科学与工程前沿(英文)》 2018年 第5卷 第1期 页码 44-56 doi: 10.15302/J-FASE-2017193
关键词: GPS collars Jornada Experimental Range land-surface phenology livestock movement LTAR MODIS NDVI rangeland
Rahul DUBEY, Pardeep KUMAR
《结构与土木工程前沿(英文)》 2013年 第7卷 第1期 页码 62-71 doi: 10.1007/s11709-013-0192-z
关键词: self-compacting concrete (SCC) fresh properties superplasticizer optimization compressive strength
Range of ecological impact of highway construction in the Longitudinal Range-Gorge Region, China
Jie LIU, Fan CHEN, Haiqing GENG, Xinxin QIU, Binbin CAI,
《环境科学与工程前沿(英文)》 2010年 第4卷 第3期 页码 349-360 doi: 10.1007/s11783-010-0027-2
关键词: range of impact quantitative analysis highway construction Longitudinal Range-Gorge Region
谭述森
《中国工程科学》 2006年 第8卷 第12期 页码 70-74
针对卫星导航系统时间同步需求,提出了导航卫星双向伪距时间同步的理论根据,并就4种基本同步方法(双向无线电伪距同步方法, 星地双向激光伪距同步方法,双向卫星中继无线电伪距同步方法, 双向地球站中继无线电伪距同步方法)与应用进行了分析,与目前国际导航卫星时间同步通用方法相比,具有精度高, 方法简单,设备负担轻特点。
Applying the multi-zone model in predicting the operating range of HCCI engines
Ming JIA, Maozhao XIE, Zhijun PENG,
《能源前沿(英文)》 2010年 第4卷 第3期 页码 414-423 doi: 10.1007/s11708-010-0108-8
关键词: homogeneous charge compression ignition (HCCI) engine multi-zone operating range
Accelerated degradation of orange G over a widepH range in the presence of FeVO
Xiaoxia Ou, Jianfang Yan, Fengjie Zhang, Chunhua Zhang
《环境科学与工程前沿(英文)》 2018年 第12卷 第1期 doi: 10.1007/s11783-018-1013-3
关键词: Azo dye Degradation FeVO4 Kinetics Advanced oxidation processes
Kd-tree and quad-tree decompositions for declustering of 2D range queries over uncertain space
Ahmet SAYAR,Süleyman EKEN,Okan ÖZTÜRK
《信息与电子工程前沿(英文)》 2015年 第16卷 第2期 页码 98-108 doi: 10.1631/FITEE.1400165
关键词: Kd tree Quad tree Space partitioning Spatial indexing Range queries Query optimization
王本庆,李兴国
《中国工程科学》 2010年 第12卷 第3期 页码 95-99
毫米波合成孔径技术利用了物体自身辐射电磁波的相位信息,采用很少阵元就能实现实时成像,但目前合成孔径技术只是限于亮温成像,缺少了目标的距离信息,这对于目标探测与识别很不利。提出在近程条件下合成孔径被动测距原理和相应的双正交傅立叶变换算法,并给出了近程距离分辨率公式,近程成像的特点是成像公式中存在二次相位因子,而且距离分辨率和距离的平方成反比。毫米波合成孔径被动成像可以同时得到物体辐射的亮温分布和距离分布,能够有效克服离焦引起的图像模糊,对图像的反降晰和目标识别具有重要意义。
Hua LIU, Xin XIE, Ruoyu TAN, Lianchao ZHANG, Dapeng FAN
《机械工程前沿(英文)》 2017年 第12卷 第2期 页码 265-278 doi: 10.1007/s11465-017-0453-y
Most of the XY positioning stages proposed in previous studies are mainly designed by considering only a single performance indicator of the stage. As a result, the other performance indicators are relatively weak. In this study, a 2-degree-of-freedom linear compliant positioning stage (LCPS) is developed by mechatronic design to balance the interacting performance indicators and realize the desired positioning stage. The key parameters and the coupling of the structure and actuators are completely considered in the design. The LCPS consists of four voice coil motors (VCMs), which are conformally designed for compactness, and six spatial leaf spring parallelograms. These parallelograms are serially connected for a large travel range and a high out-of-plane payload capacity. The mechatronic model is established by matrix structural analysis for structural modeling and by Kirchhoff’s law for the VCMs. The sensitivities of the key parameters are analyzed, and the design parameters are subsequently determined. The analytical model of the stage is confirmed by experiments. The stage has a travel range of 4.4 mm× 7.0 mm and a 0.16% area ratio of workspace to the outer dimension of the stage. The values of these performance indicators are greater than those of any existing stage reported in the literature. The closed-loop bandwidth is 9.5 Hz in both working directions. The stage can track a circular trajectory with a radius of 1.5 mm, with 40 mm error and a resolution of lower than 3 mm. The results of payload tests indicate that the stage has at least 20 kg out-of-plane payload capacity.
关键词: mechatronic design linear compliant positioning stage large travel range high out-of-plane payload capacity spatial parallelogram voice coil motor sensitivity analysis
《环境科学与工程前沿(英文)》 2022年 第16卷 第8期 doi: 10.1007/s11783-022-1522-y
• Simultaneous C & N removal in Methammox occurs at wide C:N ratio.
关键词: Methanogens Biological Nitrogen Removal (BNR) Simultaneous Methammox C:N ratio
基于对称多项式辅助的中国余数定理的脉冲多普勒雷达多目标距离估计算法 Research Articles
曹成虎1,赵永波1,2
《信息与电子工程前沿(英文)》 2022年 第23卷 第2期 页码 304-316 doi: 10.1631/FITEE.2000418
A spectrometer for measuring particle size distributions in the range of 3 nm to 10 μm
Jieqiong LIU,Jingkun JIANG,Qiang ZHANG,Jianguo DENG,Jiming HAO
《环境科学与工程前沿(英文)》 2016年 第10卷 第1期 页码 63-72 doi: 10.1007/s11783-014-0754-x
关键词: spectrometer particle size distribution electrical mobility linear inversion aerodynamic diameter
苏慧,龚维明,梁书亭
《中国工程科学》 2006年 第8卷 第7期 页码 42-46
对缺乏长期流速资料的地区,给出了一种通过当地短期流速资料推算设计基准期参考流速的方法;通过分析苏通长江公路大桥水流速度观测的有关内容,采用实测的短期实际流速记录建立流速概率分布模型,按小样本推算极值的办法,得到大桥的设计基准期的基本流速并进行相关分析,确认计算结果的合理性,建立线性回归方程;为确保大桥在动力荷载作用下的安全应用及苏通大桥工程设计、施工提供可靠的技术指导。
Shengzhi Zheng, Yudong Song, Yiming Li, Lidong Sun, Bin Hu, Mingdong An, Yuexi Zhou
《环境科学与工程前沿(英文)》 2018年 第12卷 第6期 doi: 10.1007/s11783-018-1041-z
The effect of latex concentration on appropriate demulsifier dosage was investigated. The appropriate demulsifier dosage range was controlled by zeta potential. Sulfate could broaden appropriate demulsifier dosage range and improve latex removal.
关键词: Demulsification Polybutadiene latex wastewater Polyaluminum chloride Zeta potential Sulfate addition
霍宏伟,郜帅,牛延超,张思东
《中国工程科学》 2008年 第10卷 第9期 页码 64-69
为保证在室内部署无线传感器网络节点时实现感知面积完全覆盖特定区域,在2.4 GHz的ISM频段,依据对数距离模型,分析了因天线高度不同引起的节点有效覆盖面积的变化问题,讨论了有效通信半径与有效感知半径的关系。在传统的平面节点部署方法的基础上,提出了一种考虑天线高度等环境因素的室内无线传感器网络节点快速部署方案,定义了部署规则和补充规则,从而避免了因天线高度变化而引起的感知黑洞的产生。仿真和试验结果表明该方案可以有效保证规定区域的完全覆盖,具有应用价值。
标题 作者 时间 类型 操作
Integrating space and time: a case for phenological context in grazing studies and management
Dawn M. BROWNING, Sheri SPIEGAL, Richard E. ESTELL, Andres F. CIBILS, Raul H. PEINETTI
期刊论文
An experimental study for optimization of high range water reducing superplasticizer in self compacting
Rahul DUBEY, Pardeep KUMAR
期刊论文
Range of ecological impact of highway construction in the Longitudinal Range-Gorge Region, China
Jie LIU, Fan CHEN, Haiqing GENG, Xinxin QIU, Binbin CAI,
期刊论文
Applying the multi-zone model in predicting the operating range of HCCI engines
Ming JIA, Maozhao XIE, Zhijun PENG,
期刊论文
Accelerated degradation of orange G over a widepH range in the presence of FeVO
Xiaoxia Ou, Jianfang Yan, Fengjie Zhang, Chunhua Zhang
期刊论文
Kd-tree and quad-tree decompositions for declustering of 2D range queries over uncertain space
Ahmet SAYAR,Süleyman EKEN,Okan ÖZTÜRK
期刊论文
Mechatronic design of a novel linear compliant positioning stage with large travel range and high out-of-plane
Hua LIU, Xin XIE, Ruoyu TAN, Lianchao ZHANG, Dapeng FAN
期刊论文
Enhancing the efficiency of nitrogen removing bacterial population to a wide range of C:N ratio (1.5:
期刊论文
A spectrometer for measuring particle size distributions in the range of 3 nm to 10 μm
Jieqiong LIU,Jingkun JIANG,Qiang ZHANG,Jianguo DENG,Jiming HAO
期刊论文
Broadening of appropriate demulsifier dosage range for latex-containing wastewater by sulfate addition
Shengzhi Zheng, Yudong Song, Yiming Li, Lidong Sun, Bin Hu, Mingdong An, Yuexi Zhou
期刊论文