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Seasonal microbial community shift in a saline sewage treatment plant

Qingmei YAN, Xuxiang ZHANG, Tong ZHANG, Herbert H P FANG

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 1,   Pages 40-47 doi: 10.1007/s11783-011-0304-8

Abstract: Correspondence analysis and cluster analysis on community structure profile showed that the 12 monthlyCanonical correspondence analysis revealed that and posed more significant effects on community structure

Keywords： treatment plants     polymerase chain reaction (PCR)     denaturing gradient gel electrophoresis (DGGE)     canonical correspondenceanalysis     correspondence analysis    

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Interaction and independence on methane oxidation of landfill cover soil among three impact factors: water, oxygen and ammonium

Pinjing HE, Na YANG, Wenjuan FANG, Fan Lü, Liming SHAO

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 2,   Pages 175-185 doi: 10.1007/s11783-011-0320-8

Abstract: Canonical correspondence analysis was utilized to distinguish the important impact factors.

Keywords： polymerase chain reaction (PCR)     denaturing gradient gel electrophoresis (DGGE)     principal component analysis(PCA)     canonical correspondence analysis (CCA)    

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Featurematching using quasi-conformalmaps Article

Chun-xue WANG, Li-gang LIU

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 5,   Pages 644-657 doi: 10.1631/FITEE.1500411

Abstract: We present a fully automatic method for finding geometrically consistent correspondences while discarding outliers from the candidate point matches in two images. Given a set of candidate matches provided by scale-invariant feature transform (SIFT) descriptors, which may contain many outliers, our goal is to select a subset of these matches retaining much more geometric information constructed by a mapping searched in the space of all diffeomorphisms. This problem can be formulated as a constrained optimization involving both the Beltrami coefficient (BC) term and quasi-conformal map, and solved by an efficient iterative algorithm based on the variable splitting method. In each iteration, we solve two subproblems, namely a linear system and linearly constrained convex quadratic programming. Our algorithm is simple and robust to outliers. We show that our algorithm enables producing more correct correspondences experimentally compared with state-of-the-art approaches.

Keywords： Feature correspondence     Quasi-conformal map     Splitting method    

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Correspondence: A low-profile dual-polarization programmable dual-beam scanning antenna array Perspective

Shichao ZHU, Yuanfan NING, Hongbo CHU, Pei XIAO, Gaosheng LI,Gaosheng7070@vip.163.com

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 10,   Pages 1504-1512 doi: 10.1631/FITEE.2300253

Abstract: A low-profile dual-polarization dual-beam scanning antenna array based on holographic control theory is presented in this paper. The radiating elements are ingeniously designed to achieve reconfigurable polarization and modulation of the radiation phase by controlling the state of the PIN diodes integrated on each element. A 72-channel series-parallel equal-amplitude and in-phase feeding network is integrated with the radiating array to achieve low-profile characteristics. The two-dimensional (2D) dynamic and accurate deflection of the beam is achieved by a designed direct current (DC) bias circuit that digitally encodes the antenna array using the single-chip microcontroller. A 2-element subarray and a 6×12 array have been fabricated and the digitally controllable radiation pattern of this antenna system has been experimentally verified. The antenna system can achieve the beam scanning of -30° to 30° with a step-scan of 5° at 11 GHz. The proposed antenna system is characterized by low profile, low cost, easy integration, and accurate beam steering, and holds broad application prospects in radar systems, smart antennas, and other fields.
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Correspondence: Uncertainty-aware complementary label queries for active learning Perspective

Shengyuan LIU, Ke CHEN, Tianlei HU, Yunqing MAO,liushengyuan@zju.edu.cn,chenk@cs.zju.edu.cn,htl@zju.edu.cn,myq@citycloud.com.cn

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 10,   Pages 1497-1503 doi: 10.1631/FITEE.2200589

Abstract: Many active learning methods assume that a learner can simply ask for the full annotations of some training data from annotators. These methods mainly try to cut the annotation costs by minimizing the number of annotation actions. Unfortunately, annotating instances exactly in many real-world classification tasks is still expensive. To reduce the cost of a single annotation action, we try to tackle a novel active learning setting, named active learning with complementary labels (ALCL). ALCL learners ask only yes/no questions in some classes. After receiving answers from annotators, ALCL learners obtain a few supervised instances and more training instances with complementary labels, which specify only one of the classes to which the pattern does not belong. There are two challenging issues in ALCL: one is how to sample instances to be queried, and the other is how to learn from these complementary labels and ordinary accurate labels. For the first issue, we propose an uncertainty-based sampling strategy under this novel setup. For the second issue, we upgrade a previous ALCL method to fit our sampling strategy. Experimental results on various datasets demonstrate the superiority of our approaches.

Keywords： 主动学习；图片分类；弱监督学习    

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Correspondence: Monopulse transmitarray antenna fed by aperture-coupled microstrip structure Correspondence

Na KOU, Shixing YU, Zhao DING, Zhengping ZHANG,nkou@gzu.edu.cn,sxyu1@gzu.edu.cn,zding@gzu.edu.cn,zpzhang@gzu.edu.cn

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 3,   Pages 502-510 doi: 10.1631/FITEE.2000547

Abstract: Monopulse technique, also known as the simultaneous beam comparison method, is used mainly to measure the direction of arrival (DOA) (Sherman and Barton, 2011). Before the advent of monopulse technology, the method most widely used in radar direction finding was the lobe-switching technique (sequential lobing) (Lo, 1999). Compared with the sequential lobing method, the monopulse antenna can obtain information such as the pitch angle, azimuth angle, and distance of the target in a single pulse period (Vazquez-Roy et al., 2019). Due to the need for higher accuracy of angle measurement, the monopulse technique has been widely applied in SOTM missile guidance (Roy et al., 2019). When a monopulse system is working, multiple independent channels are adopted to receive signals reflected by targets at the same time. Then signals enter the comparator and finally the distance and angle information of targets can be obtained. There are three main types of monopulse antennas: lenses, reflectors, and arrays. A dielectric lens is generally a convex lens (Raman et al., 1998), which is difficult to manufacture due to its curved shape, high volume, and large mass. For common reflectors such as dish antennas, the feed and supporting structure are in front of the aperture, so a shielding effect will result in energy loss, sidelobe increase, and angle measurement error (Kou and Cheng, 2019). A more effective reflector is the Cassegrain antenna, which is more compact with dual reflectors (Zheng et al., 2016, 2017). However, the Cassegrain antenna has the problem of shielding effect caused by a secondary reflector and support rods. With growing demand for low cost and lightweight monopulse antennas in modern radar and telecommunications systems, array antennas are increasingly applied in monopulse antennas due to their characteristics of high gain and easy control of the beam direction. A typical example is the waveguide slot array, which has the advantages of low loss, low sidelobe level, and no aperture shielding problem (Vosoogh et al., 2018). The microstrip has attracted much attention in monopulse antennas because of its advantages of low profile, simple structure, and low cost (Yu et al., 2009; Kumar and Kumar, 2018). However, monopulse microstrip array antennas usually have a complex feed network, which often makes them large and expensive. In addition, substrate integrated waveguides (SIWs) (Cao et al., 2017; Zhu et al., 2018; Liu et al., 2019; Yang et al., 2019) and leaky wave antennas (LWAs) (Poveda-García et al., 2019) have been applied in monopulse antennas, with good results. Recently, reflectarrays have been proposed for use in monopulse antennas, and have shown good performance (Zhao et al., 2017, 2018). As an alternative to reflectarrays, transmitarrays not only have the advantages of reflectarrays, but also have no shielding effect from the feeds. Di Palma et al. (2016) proposed a 400-element reconfigurable transmitarray antenna to synthesize monopulse radiation patterns. However, the sum and difference patterns generated by the reconfigurable transmitarray antenna, which is controlled electronically by switches instead of by a SUM-DIFF comparator, are in time division.

Keywords： 孔径耦合；单脉冲天线；微带；透射阵列    

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Multi-View Point-Based Registration for Native Knee Kinematics Measurement with Feature Transfer Learning Article

Cong Wang, Shuaining Xie, Kang Li, Chongyang Wang, Xudong Liu, Liang Zhao, Tsung-Yuan Tsai

Engineering 2021, Volume 7, Issue 6,   Pages 881-888 doi: 10.1016/j.eng.2020.03.016

Abstract:

Deep-learning methods provide a promising approach for measuring in-vivo knee joint motion from fast registration of two-dimensional (2D) to three-dimensional (3D) data with a broad range of capture. However, if there are insufficient data for training, the data-driven approach will fail. We propose a feature-based transfer-learning method to extract features from fluoroscopic images. With three subjects and fewer than 100 pairs of real fluoroscopic images, we achieved a mean registration success rate of up to 40%. The proposed method provides a promising solution, using a learning-based registration method when only a limited number of real fluoroscopic images is available.

Keywords： 2D–3D registration     Machine learning     Domain adaption     Point correspondence    

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Decomposition analysis applied to energy and emissions: A literature review

Frontiers of Engineering Management   Pages 625-639 doi: 10.1007/s42524-023-0270-4

Abstract: Decomposition analysis has been widely used to assess the determinants of energy and CO2 emissionsBoth the methodology and application of decomposition analysis have been largely improved in the pastTo this end, this study presents a literature survey for decomposition analysis applied to energy andtechniques is first conducted, followed by a synthesis of emerging trends and features for the decomposition analysisThe findings are expected to direct future research in decomposition analysis.

Keywords： index decomposition analysis     structural decomposition analysis     production decomposition analysis     energy    

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Flow, thermal, and vibration analysis using three dimensional finite element analysis for a flux reversal

B. VIDHYA,K. N. SRINIVAS

Frontiers in Energy 2016, Volume 10, Issue 4,   Pages 424-440 doi: 10.1007/s11708-016-0423-9

Abstract: A three-dimensional finite element analysis (FEA) based CFD technique for finding the spread of pressureThe results of CFD are mainly obtained to fine tune the thermal analysis.Thus, in this focus, a flow analysis assisted thermal analysis is presented to predict the steady stateThe vibration analysis is illustrated.Harmonic analysis such as sine sweep analysis to identify the range of speeds causing high vibrations

Keywords： flux reversal generator     air velocity     computation fluid dynamics     thermal analysis     vibration analysis     finiteelement analysis    

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Review of sentiment analysis: An emotional product development view

Frontiers of Engineering Management   Pages 592-609 doi: 10.1007/s42524-022-0227-z

Abstract: Given that sentiment analysis (SA) can extract and analyze people’s opinions, sentiments, attitudes,

Keywords： sentiment analysis     emotion     product development     Kansei Engineering    

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Jack up reliability analysis: An overview

Ahmad IDRIS, Indra Sati Hamonangan HARAHAP, Montasir Osman Ahmed ALI

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4,   Pages 504-514 doi: 10.1007/s11709-017-0443-5

Abstract: Reliability analysis theories are one of the frameworks recommended for the safety assessment of theWith recent developments in uncertainty and reliability analysis of structures subject to stochasticexcitation, this study aims at providing a review on the past developments in jack up reliability analysisThe results from literature reviewed shows that failure probabilities vary significantly with analysisIn addition, from the variants of reliability analysis approach, the method of time dependent reliability

Keywords： jack up     reliability analysis     uncertainty analysis     review of jack up    

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Systems biomedical analysis of Schistosoma japonicum

Ze-Guang HAN MD,

Frontiers of Medicine 2010, Volume 4, Issue 2,   Pages 157-165 doi: 10.1007/s11684-010-0034-5

Abstract: Human schistosomiasis, caused mainly by three principal species including , , and , remains a major public health concern worldwide. is prevalent in southern China, being a major disease risk for 66 million people. The blood fluke has a complex life cycle for survival: as a free-living form in fresh water and as a parasite in the snail intermediate and vertebrate definitive hosts. Systems-based biomedical analyses, including genomic, transcriptomic, proteomic and metabonomic approaches, have been performed on the schistosome. These comprehensive investigations have not only characterized the genomic features but also chartered gene and protein expression profiles across genders and developmental stages. The integration of the huge information will lay a global and solid foundation for the molecular architecture of the biology, pathogenesis, and host-parasite interactions of the human blood fluke, which will facilitate the development of a new antischistosomal vaccine and drugs as well as diagnostic markers for the treatment and control of schistosomiasis.

Keywords： Schistosoma japonicum     systems biomedical analysis    

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Numerical analysis and experimental investigation of modal properties for the gearbox in wind turbine

Pengxing YI,Peng HUANG,Tielin SHI

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 4,   Pages 388-402 doi: 10.1007/s11465-016-0404-z

Abstract:

Wind turbine gearbox (WTG), which functions as an accelerator, ensures the performance and service life of wind turbine systems. This paper examines the distinctive modal properties of WTGs through finite element (FE) and experimental modal analyses. The study is performed in two parts. First, a whole system model is developed to investigate the first 10 modal frequencies and mode shapes of WTG using flexible multi-body modeling techniques. Given the complex structure and operating conditions of WTG, this study applies spring elements to the model and quantifies how the bearings and gear pair interactions affect the dynamic characteristics of WTGs. Second, the FE modal results are validated through experimental modal analyses of a 1.5 WM WTG using the frequency response function method of single point excitation and multi-point response. The natural frequencies from the FE and experimental modal analyses show favorable agreement and reveal that the characteristic frequency of the studied gearbox avoids its eigen-frequency very well.

Keywords： wind turbine gearbox     modal analysis     finite element analysis     modal frequency     bearing equivalence    

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Isogeometric analysis of coupled thermo-elastodynamic problems under cyclic thermal shock

Asghar AMANI DASHLEJEH

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 397-405 doi: 10.1007/s11709-018-0473-7

Abstract: The isogeometric analysis (IGA) method was extended for the solution of the coupled thermo-elastodynamicThe results dedicated that IGA can be used as a suitable approach in the analysis of the general thermomechanical

Keywords： isogeometric analysis     coupled thermo-elastodynamic     dynamic analysis     generalized newmark     cyclic thermal    

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A dimensional analysis on asphalt binder fracture and fatigue cracking

Qian ZHAO, Zhoujing YE

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 2,   Pages 201-206 doi: 10.1007/s11709-017-0402-1

Abstract: In this paper, we present a new comprehensive approach, which consists both of dimensional analysis usingBuckingham Theorem and -integral analysis based on classic fracture mechanics, to evaluate the fractureIt is discovered that the dimensional analysis could provide a new perspective to analyze the asphalt

Keywords： Dimensional analysis     asphalt     fracture     fatigue cracking    

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Title Author Date Type Operation

Seasonal microbial community shift in a saline sewage treatment plant

Qingmei YAN, Xuxiang ZHANG, Tong ZHANG, Herbert H P FANG

Journal Article

Interaction and independence on methane oxidation of landfill cover soil among three impact factors: water, oxygen and ammonium

Pinjing HE, Na YANG, Wenjuan FANG, Fan Lü, Liming SHAO

Journal Article

Featurematching using quasi-conformalmaps

Chun-xue WANG, Li-gang LIU

Journal Article

Correspondence: A low-profile dual-polarization programmable dual-beam scanning antenna array

Shichao ZHU, Yuanfan NING, Hongbo CHU, Pei XIAO, Gaosheng LI,Gaosheng7070@vip.163.com

Journal Article

Correspondence: Uncertainty-aware complementary label queries for active learning

Shengyuan LIU, Ke CHEN, Tianlei HU, Yunqing MAO,liushengyuan@zju.edu.cn,chenk@cs.zju.edu.cn,htl@zju.edu.cn,myq@citycloud.com.cn

Journal Article

Correspondence: Monopulse transmitarray antenna fed by aperture-coupled microstrip structure

Na KOU, Shixing YU, Zhao DING, Zhengping ZHANG,nkou@gzu.edu.cn,sxyu1@gzu.edu.cn,zding@gzu.edu.cn,zpzhang@gzu.edu.cn

Journal Article

Multi-View Point-Based Registration for Native Knee Kinematics Measurement with Feature Transfer Learning

Cong Wang, Shuaining Xie, Kang Li, Chongyang Wang, Xudong Liu, Liang Zhao, Tsung-Yuan Tsai

Journal Article

Decomposition analysis applied to energy and emissions: A literature review

Journal Article

Flow, thermal, and vibration analysis using three dimensional finite element analysis for a flux reversal

B. VIDHYA,K. N. SRINIVAS

Journal Article

Review of sentiment analysis: An emotional product development view

Journal Article

Jack up reliability analysis: An overview

Ahmad IDRIS, Indra Sati Hamonangan HARAHAP, Montasir Osman Ahmed ALI

Journal Article

Systems biomedical analysis of Schistosoma japonicum

Ze-Guang HAN MD,

Journal Article

Numerical analysis and experimental investigation of modal properties for the gearbox in wind turbine

Pengxing YI,Peng HUANG,Tielin SHI

Journal Article

Isogeometric analysis of coupled thermo-elastodynamic problems under cyclic thermal shock

Asghar AMANI DASHLEJEH

Journal Article

A dimensional analysis on asphalt binder fracture and fatigue cracking

Qian ZHAO, Zhoujing YE

Journal Article