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Spatial and Temporal Distribution of PM

Xiao-hong Chen,Xiang-bo Tang

Frontiers of Engineering Management 2016, Volume 3, Issue 2,   Pages 171-181 doi: 10.15302/J-FEM-2016017

Abstract: Utilizing the initial hourly monitoring data of PM concentrations at 23 monitoring sites across the Chang-Zhu-Tancity cluster between January 2013 and February 2014 that released in Real-time Air Quality ReportingPM pollution combined with the information of industry distribution and development status in the Chang-Zhu-Tancity cluster.

Keywords： PM2.5     spatial and temporal distribution     ArcGIS     the chang-Zhu-Tan city cluster    

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System and prospects of China’s intercity rail transit technology

Ming GONG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 2,   Pages 323-328 doi: 10.1007/s11465-018-0463-4

Abstract:

City clusters and metropolitan areas in China are flourishing in the midst of the deepening urbanizationrailways for an integrated regional transportation system that underpins and leads the development of city

Keywords： intercity rail transit     city cluster     technical demand     technology system    

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Displacement measuring grating interferometer: a review Special Feature on Precision Measurement and Inst

Peng-cheng HU, Di CHANG, Jiu-bin TAN, Rui-tao YANG, Hong-xing YANG, Hai-jin FU

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 5,   Pages 631-654 doi: 10.1631/FITEE.1800708

Abstract:

A grating interferometer, called the “optical encoder,” is a commonly used tool for precise displacement measurements. In contrast to a laser interferometer, a grating interferometer is insensitive to the air refractive index and can be easily applied to multi-degree-of-freedom measurements, which has made it an extensively researched and widely used device. Classified based on the measuring principle and optical configuration, a grating interferometer experiences three distinct stages of development: homodyne, heterodyne, and spatially separated heterodyne. Compared with the former two, the spatially separated heterodyne grating interferometer could achieve a better resolution with a feature of eliminating periodic nonlinear errors. Meanwhile, numerous structures of grating interferometers with a high optical fold factor, a large measurement range, good usability, and multidegree-of-freedom measurements have been investigated. The development of incremental displacement measuring grating interferometers achieved in recent years is summarized in detail, and studies on error analysis of a grating interferometer are briefly introduced.

Keywords： Grating interferometer     Optical encoder     Displacement measurement     Precision measurement    

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Low carbon scenario and technologies in modern city——Case study of Shenyang City

Liu Zhu,Geng Yong ,Xue Bing,Dong Huijuan

Strategic Study of CAE 2011, Volume 13, Issue 4,   Pages 101-105

Abstract: carbon dioxide,industrial pollutant emission and resource consumption in the case study of Shenyang CityThe results showed that the city played a key role in global low-carbon economic construction, and emission

Keywords： modern city     low carbon     emission reduction technology    

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Concentrations and classification of HCHs and DDTs in soil from the lower reaches of the Jiulong River, China

Jiaquan ZHANG, Shihua QI, Xinli XING, Lingzhi TAN, Wei CHEN, Ying HU, Dan YANG, Chenxi WU

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 2,   Pages 177-183 doi: 10.1007/s11783-011-0354-y

Abstract: Hierarchical Cluster Analysis (HCA) and Pearson’s bivariate Correlations Analysis (PCA) were used to

Keywords： River     hexachlorocyclohexane (HCH) and dichlorodiphenyltrichloroethan (DDT)     classification     Hierarchical Cluster    

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Source apportionment of ambient PM

Bo HAN, Xiaohui BI, Yonghua XUE, Jianhui WU, Tan ZHU, Baogui ZHANG, Jianqing DING, Yuanxin DU

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 4,   Pages 552-563 doi: 10.1007/s11783-010-0263-5

Abstract: A total of 168 PM samples were collected during the year of 2005 at eight sites in the city of Wuxi

Keywords： source apportionment     inhalable particulate matter     nested chemical mass balance method    

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Design of tandem genes cluster for isoflavone engineering

Xunli XIA PhD , Guangxiao YANG PhD , Guangyuan HE PhD ,

Frontiers of Medicine 2009, Volume 3, Issue 3,   Pages 292-296 doi: 10.1007/s11684-009-0057-y

Abstract: In this paper, a universal effective novel method of constructing tandem genes cluster for isoflavoneA tandem genes cluster () of secondary metabolites of plant isoflavones was constructed by using the

Keywords： isoflavones engineering     secondary metabolism     tandem genes cluster    

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Understanding high-emitting households in the UK through a cluster analysis

Xinfang WANG, Ming MENG

Frontiers in Energy 2019, Volume 13, Issue 4,   Pages 612-625 doi: 10.1007/s11708-019-0647-6

Abstract: It applies a cluster approach, aiming to identify whether the high emitters comprise clusters where householdsin each cluster share similar characteristics but are different from the others.Policymakers should target each high-emitter cluster differently to reduce CO emissions from energy

Keywords： cluster analysis     emissions reduction     energy use     high emitters     household energy consumption     socioeconomic    

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Pt-Ni nanourchins as electrocatalysts for oxygen reduction reaction

Qiaowan CHANG, Yuan XU, Shangqian ZHU, Fei XIAO, Minhua SHAO

Frontiers in Energy 2017, Volume 11, Issue 3,   Pages 254-259 doi: 10.1007/s11708-017-0493-3

Abstract: Pt-Ni bimetallic alloys with various nanostructures have shown excellent activity toward oxygen reduction reaction (ORR). The ORR activity is highly dependent on the structure of the catalyst. In this paper, Pt-Ni nanourchins were synthesized with an average size of 50 nm consisting of 10–20 nanorods and nanooctahedra by adjusting the synthesis condition. The formation of Pt-Ni nanourchins is mainly dependent on the adding order of solvents (benzyl ether, oleylamine and oleic acid). Pt-Ni nanourchins present a reasonable high ORR activity (0.81 A/mg at 0.9 V).

Keywords： Pt-Ni alloys     nanourchins     oxygen reduction reaction     shape control     fuel cells    

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Scaling up of cluster beam deposition technology for catalysis application

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 6,   Pages 1360-1379 doi: 10.1007/s11705-021-2101-7

Abstract: Many research works have demonstrated that the combination of atomically precise cluster deposition andtheoretical calculations is able to address fundamental aspects of size-effects, cluster-support interactions, and reaction mechanisms of cluster materials.In this review, we introduce the latest progress on three types of cluster source which have the mostsource, and matrix assembly cluster source.

Keywords： nanoparticle     cluster     cluster beam deposition     magnetron sputtering     heterogeneous catalysis    

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A driving pulse edge modulation technique and its complex programming logic devices implementation

Xiao CHEN,Dong-chang QU,Yong GUO,Guo-zhu CHEN

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 12,   Pages 1088-1098 doi: 10.1631/FITEE.1500111

Abstract: With the continual increase in switching speed and rating of power semiconductors, the switching voltage spike becomes a serious problem. This paper describes a new technique of driving pulse edge modulation for insulated gate bipolar transistors (IGBTs). By modulating the density and width of the pulse trains, without regulating the hardware circuit, the slope of the gate driving voltage is controlled to change the switching speed. This technique is used in the driving circuit based on complex programmable logic devices (CPLDs), and the switching voltage spike of IGBTs can be restrained through software, which is easier and more flexible to adjust. Experimental results demonstrate the effectiveness and practicability of the proposed method.

Keywords： Driving pulse edge modulation     Switching voltage spike     Complex programmable logic device (CPLD)     Active gate drive    

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Characteristic of the equivalent impedance for an Article

Zhi-zhong TAN, Hong ZHU, Jihad H. ASAD, Chen XU, Hua TANG

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 12,   Pages 2070-2081 doi: 10.1631/FITEE.1700037

Abstract: Considerable progress has been made recently in the development of techniques to determine exactly two-point resistances in networks of various topologies. In particular, a general resistance formula of a non-regular × resistor network with an arbitrary boundary is determined by the recursion-transform (RT) method. However, research on the complex impedance network is more difficult than that on the resistor network, and it is a problem worthy of study since the equivalent impedance has many different properties from equivalent resistance. In this study, the equivalent impedance of a non-regular × RLC network with an arbitrary boundary is studied based on the resistance formula, and the oscillation characteristics and resonance properties of the equivalent impedance are discovered. In the RLC network, it is found that our formula leads to the occurrence of resonances at the boundary condition holding a series of specific values with an external alternating current source. This curious result suggests the possibility of practical applications of our formula to resonant circuits.

Keywords： RLC network     Resonance properties     Oscillation characteristics     Amplitude-frequency    

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A cytoprotective graphene oxide-polyelectrolytes nanoshell for single-cell encapsulation

Luanying He, Yulin Chang, Junhao Zhu, Ying Bi, Wenlin An, Yiyang Dong, Jia-Hui Liu, Shihui Wang

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 2,   Pages 410-420 doi: 10.1007/s11705-020-1950-9

Abstract: Graphene oxide (GO) has been increasingly utilized in the fields of food, biomedicine, environment and other fields because of its benign biocompatible. We encapsulated two kinds of GO with different sizes on yeast cells with the assistance of polyelectrolytes poly (styrene sulfonic acid) sodium salt (PSS) and polyglutamic acid (PGA) (termed as Y@GO). The result does not show a significant difference between the properties of the two types of Y@GO (namely Y@GO1 and Y@GO2). The encapsulation layers are optimized as Yeast/PGA/PSS/PGA/GO/PGA/PSS based on the morphology, dispersity, colony-forming unit, and zeta potential. The encapsulation of GO increases the roughness of the yeast. It is proved that the Y@GO increases the survival time and enhance the activity of yeast cells. The GO shell improves the resistance of yeast cells against pH and salt stresses and extends the storage time of yeast cells.

Keywords： GO     yeast     polyelectrolyte     cytoprotection     nanomaterials    

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Effective degradation of tetracycline by mesoporous Bi

Xiaolong CHU,Guoqiang SHAN,Chun CHANG,Yu FU,Longfei YUE,Lingyan ZHU

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 2,   Pages 211-218 doi: 10.1007/s11783-014-0753-y

Abstract: Bi WO was synthesized with a hydrothermal method at different pHs and used for the degradation of tetracycline (TC) in water. The mesoporous Bi WO prepared at pH 1 (BWO-1) displayed the highest adsorption and degradation capacity to TC due to its large surface area and more efficient capacity to separate photogenerated electrons and holes. 97% of TC at 20 mg·L was removed by BWO-1 at 0.5 g·L after 120 min irradiation under simulated solar light. Only 31% of the total organic carbon (TOC) was removed after 360 min irradiation although the TC removal reached 100%, suggesting that TC was mainly transformed to intermediate products rather than completely mineralized. The intermediates were identified by high-performance liquid chromatography-time of flight-mass spectrometry (HPLC-TOF-MS) and possible photodegradation pathways were proposed.

Keywords： Bi2WO6     hydrothermal synthesis     tetracycline (TC)     photocatalysis    

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Theoretical analysis of novel weak current sensor using FeCuNbSiB single nanocrystalline toroidal core and double-winding

BAO Bing-hao, ZHU Da-qi, DING Jian-ning, LI Chang-sheng

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 4,   Pages 439-442 doi: 10.1007/s11465-006-0054-7

Abstract: An FeCuNbSiB nanocrystalline toroidal core made by isothermal furnace annealing shows good thermal stability of magnetic properties and excellent soft magnetic properties due to the full release of the internal stresses of the core during the annealing process. Based on the feature of the magnetic core, a novel non-contact type weak current sensor adopting single nanocrystalline core and double-winding excited by multivibrator bridge is proposed. The measuring principles for static current are given in theory by an established mathematical model of the sensor. The theory is in good agreement with the experimental results and it indicated clearly the key factors affecting performance parameters for the sensor. The multivibrator bridge output signal was analyzed by Fourier transform. Furthermore, according to the theoretical results, the method to design the signal conditioning circuit was introduced.

Keywords： measuring     mathematical     Furthermore     transform     FeCuNbSiB nanocrystalline    

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Title Author Date Type Operation

Spatial and Temporal Distribution of PM

Xiao-hong Chen,Xiang-bo Tang

Journal Article

System and prospects of China’s intercity rail transit technology

Ming GONG

Journal Article

Displacement measuring grating interferometer: a review

Peng-cheng HU, Di CHANG, Jiu-bin TAN, Rui-tao YANG, Hong-xing YANG, Hai-jin FU

Journal Article

Low carbon scenario and technologies in modern city——Case study of Shenyang City

Liu Zhu,Geng Yong ,Xue Bing,Dong Huijuan

Journal Article

Concentrations and classification of HCHs and DDTs in soil from the lower reaches of the Jiulong River, China

Jiaquan ZHANG, Shihua QI, Xinli XING, Lingzhi TAN, Wei CHEN, Ying HU, Dan YANG, Chenxi WU

Journal Article

Source apportionment of ambient PM

Bo HAN, Xiaohui BI, Yonghua XUE, Jianhui WU, Tan ZHU, Baogui ZHANG, Jianqing DING, Yuanxin DU

Journal Article

Design of tandem genes cluster for isoflavone engineering

Xunli XIA PhD , Guangxiao YANG PhD , Guangyuan HE PhD ,

Journal Article

Understanding high-emitting households in the UK through a cluster analysis

Xinfang WANG, Ming MENG

Journal Article

Pt-Ni nanourchins as electrocatalysts for oxygen reduction reaction

Qiaowan CHANG, Yuan XU, Shangqian ZHU, Fei XIAO, Minhua SHAO

Journal Article

Scaling up of cluster beam deposition technology for catalysis application

Journal Article

A driving pulse edge modulation technique and its complex programming logic devices implementation

Xiao CHEN,Dong-chang QU,Yong GUO,Guo-zhu CHEN

Journal Article

Characteristic of the equivalent impedance for an

Zhi-zhong TAN, Hong ZHU, Jihad H. ASAD, Chen XU, Hua TANG

Journal Article

A cytoprotective graphene oxide-polyelectrolytes nanoshell for single-cell encapsulation

Luanying He, Yulin Chang, Junhao Zhu, Ying Bi, Wenlin An, Yiyang Dong, Jia-Hui Liu, Shihui Wang

Journal Article

Effective degradation of tetracycline by mesoporous Bi

Xiaolong CHU,Guoqiang SHAN,Chun CHANG,Yu FU,Longfei YUE,Lingyan ZHU

Journal Article

Theoretical analysis of novel weak current sensor using FeCuNbSiB single nanocrystalline toroidal core and double-winding

BAO Bing-hao, ZHU Da-qi, DING Jian-ning, LI Chang-sheng

Journal Article