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Embankment dam foundation analysis for the decrease of internal erosion likelihood

Marc SMITH

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 4, Pages 431-436 doi: 10.1007/s11709-012-0183-5

Abstract: A global electromagnetic survey was carried out to detect and map the main sources, pathways and exitsA laser airborne survey was performed to model the land surface elevation.

Keywords： seepage detection geostatistical analysis dam monitoring internal erosion LIDAR survey

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Novel robust simultaneous localization and mapping for long-term autonomous robots Research Articles

Wei WEI, Xiaorui ZHU, Yi WANG,weirui9003@gmail.com,xiaoruizhu@hit.edu.cn,wangyi601@aliyun.com

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 2, Pages 234-245 doi: 10.1631/FITEE.2000358

Abstract: propose a novel robust visual inertial navigation (VILN) SLAM system, including stereo visual-inertial LiDaRodometry and visual-LiDaR loop closure.The proposed VILN SLAM system can perform well with low drift after experiments, even when the LiDaR

Keywords： Simultaneous localization and mapping (SLAM) Long-term Robustness Light detection and ranging (LiDaR) Visual inertial LiDaR navigation (VILN)

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On-Chip LiDAR Technology Advances for Cars, Cell Phones

Mitch Leslie

Engineering 2022, Volume 18, Issue 11, Pages 3-5 doi: 10.1016/j.eng.2022.09.003

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A survey on assembly lines and its types

Ullah SAIF,Zailin GUAN,Baoxi WANG,Jahanzeb MIRZA,Shiyang HUANG

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 2, Pages 95-105 doi: 10.1007/s11465-014-0302-1

Abstract: A survey of different problems in different types of assembly lines and some of the critical and on going

Keywords： assembly lines line balancing survey

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Pollution survey of carbonyl compounds in train air

LU Hao, ZHU Lizhong

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 1, Pages 125-128 doi: 10.1007/s11783-007-0023-3

Abstract: The train is an important vehicle in China, but its air quality has important impacts on passengers health. In this work, pollution from carbonyl compounds was measured in the air of six trains. The objectives of this work were to investigate carbonyl compound levels in selected air from trains, identify their emission sources, and assess the intake of carbonyl compounds for passengers. The methods for sampling and analyzing 10 carbonyl compounds such as formaldehyde, acetaldehyde, acrolein, acetone, propionaldehyde, crotonaldehyde, butyraldehyde, benzaldehyde, cyclohexanone, and valeraldehyde in indoor air were proposed with the sampling efficiency, recovery, and detection limit being 92% 100%, 91% 104%, and 0.26 0.82 ng/m, respectively. It was indicated that the total concentrations of carbonyl compounds were 0.159 0.2828 mg/m with the average concentration of 0.2330 mg/m. The average concentrations of formaldehyde, acetaldehyde and acetone were 0.0922, 0.0499, and 0.0580 mg/m, accounting for 42.6%, 21.4%, and 24.9% of the total concentrations of carbonyl compounds, respectively. The carbonyl compounds probably came from woodwork and cigarette smoking. The intake of carbonyl compounds for the passengers was approximately 0.043 0.076 mg/h. The carbonyl compounds in train air could be harmful to human health.

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Spatial Discrimination of Complex, Low-Relief Quaternary Siliciclastic Strata Using Airborne Lidar and Article

Jeffrey G. Paine,Edward W. Collins,Lucie Costard

Engineering 2018, Volume 4, Issue 5, Pages 676-684 doi: 10.1016/j.eng.2018.09.005

Abstract: High-resolution airborne lidar surveys, along with surface and borehole geophysical measurements, areHigh-resolution digital elevation models obtained from airborne lidar surveys reveal previously unrecognizedsurvey to produce a detailed elevation model; ② selective surface sampling and geophysical measurementsbased on preliminary mapping derived from lidar data and aerial imagery; and ③ borehole sampling, logging, and analysis at key sites selected after lidar and surface measurements are complete.

Keywords： Lithology Geophysics Electromagnetic induction Lidar

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Novel sensing techniques for full-scale testing of civil structures

Kaoshan DAI, Zhenhua HUANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3, Pages 240-256 doi: 10.1007/s11709-012-0172-8

Abstract: Performing full-scale structural testing is an important methodology for researchers and engineers in the civil engineering industry. Full scale testing helps the researchers understand civil infrastructures’ loading scenarios, behaviors, and health conditions. It helps the engineers verify, polish, and simplify the structural design and analysis theories. To conduct a full-scale structural testing, sensors are used for data acquisitions. To help structural researchers and engineers get familiar with sensing technologies and select the most effective sensors, this study reviewed and categorized new sensing techniques for full-scale structural testing applications. The researchers of this study categorized sensors used for civil-infrastructure testing into traditional contact sensors and remote sensors based upon their application methodologies, and into cabled sensors and wireless sensors based upon their data communication strategies. The detailed descriptions of wireless sensors and remote sensing techniques and their on-site full-scale applications are presented.

Keywords： sensing technique full-scale testing wireless sensor remote sensing LiDAR laser vibrometer

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A survey of instantaneous poles for a class of two-degree-of-freedom spherical mechanisms

Soheil ZARKANDI

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 4, Pages 344-353 doi: 10.1007/s11465-014-0320-z

Abstract:

This paper is a detailed exploration of instantaneous poles for a class of two-degree-of-freedom (two-DOF) spherical mechanisms (SMs) with seven links or bars. For two-DOF SMs, the secondary instantaneous poles (the ones which cannot be found by direct inspection) must lie on the specified great circles. For many of these mechanisms, however, some of these great circles cannot be obtained by a direct application of Aronhold-Kennedy theorem. This paper presents geometrical and analytical techniques to locate these unknown great circles for three topologies of seven-bar two-DOF SMs.

Keywords： spherical mechanisms instantaneous poles Aronhold-Kennedy theorem great circles pencil of meridian

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A survey of physical activity among urban women in China

Shilin DENG MD, Tongyuan LIU,

Frontiers of Medicine 2009, Volume 3, Issue 4, Pages 463-469 doi: 10.1007/s11684-009-0081-y

Abstract: Few studies have been conducted to assess the level of physical activity (PA) of women in China. The purpose of this study was to describe the prevalence of PA among women in Wuhan and explore sociodemographic and behavioral correlation to PA for the population. A total of 1359 community-dwelling women (42.9713.60 years old) participated in this study. The long-version IPAQ was used to define the level of PA. 45.7% of women were considered physically active, and 27.5% were vigorously active. The proportion of physical inactivity was around 26.8%. The total and 4 domains of PA showed significant age, education level, and occupation variation. PA tended to be lower as the age declined. PA in transportation, housework, leisure time, and the total tended to be the lowest or the second lowest among the women aged 18–35 years old. PA tended to be lower as the level of education increased. Among the 5 indices, PAwas the lowest among women with college education, especially those with postgraduate education. PA tended to be the lowest among the women of office staff and instructor or technician. Generally, the total and 4 domains of PA showed significant age, education level, and occupation variation. Physical inactivity appears to be more common among younger women, or college-educated women, office ladies, and female instructor and technicians.

Keywords： physical activity urban women China

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Survey of the Algorithms on Association Rule Mining

Bi Jianxin,Zhang Qishan

Strategic Study of CAE 2005, Volume 7, Issue 4, Pages 88-94

Abstract:

In this paper the principle of the algorithms on association rule mining is introduced firstly, and researches of the algorithms on association rule mining are summarized in turn according to variable (dimension), abstract levels data and types of transacted variable (Boolean and Quantitative) in the process of data mining. At the same time some typical algorithms are analyzed and compared. At last, some future directions on association rule generation are viewed.

Keywords： data mining association rule algorithms survey

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A survey of decorative materials on the energy consumption of mid-rise residential buildings in Mashad

Masoud Taheri SHAHRAEIN, Lihua ZHAO, Qinglin MENG

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 4, Pages 490-497 doi: 10.1007/s11709-010-0068-4

Abstract: Polyvinylchloride (PVC) panel is one of the most favorite decorative materials that has been popularly applied as finishing of ceiling in residential buildings. It is about five years that the people incline to redecorate the ceiling of old buildings with PVC panel in big cities of Iran, such as Mashad. In this study, the influence of ceiling PVC panel on the cooling and heating loads of studied apartment were determined by software DeST-h. In addition, the summer natural ventilation of the mentioned apartment is investigated by determining the wind speed into the apartment through the computational fluid dynamics (CFD) software. The evaluation of environment indoor wind velocity showed that most of the apartment space is a comfortable zone. The results of studied building analyses demonstrated that using PVC panel on the ceiling can decline the energy consumption of the penthouse (fifth level) of the investigated building, which is about 3.7% and 7% for studied methods of without and with air layer, respectively. In addition, although the existence of air layer can decline the cooling and heating loads, the increase in air layer thickness did not show significant decrease on building energy consumption. However, the PVC panel is expensive and is not suitable to be used for ceiling thermal insulation, but adding a thin layer of air between ceiling and PVC panel can be a good step toward sustainable building, when the people are inclined to utilize it as a decorative ceiling.

Keywords： residential apartments natural ventilation energy consumption decorative materials Mashad

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On Modernization of the Regional Geological Survey and Deep Exploration Techniques in China

Zhao Wenjin

Strategic Study of CAE 2003, Volume 5, Issue 6, Pages 25-32

Abstract:

Some characteristic features of the past regional geological survey in China have been summarizedtransportation, communication, recording and digital map making and so on, the regional geological survey

Keywords： regional geological survey deep exploration resources environment

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Public perception of environmental issues across socioeconomic characteristics: A survey study in Wujin

Jun BI, Yongliang ZHANG, Bing ZHANG,

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 3, Pages 361-372 doi: 10.1007/s11783-010-0017-4

Abstract: In developing countries, there is controversy over the correct perception regarding environmental and developmental issues. Few studies have examined the perception of low-income nationals in regards to social and environmental issues. This paper looks at the relationship between socio-demographic factors and the groups’ perceived priority regarding environmental and social issues in Wujin County. The results indicated that most residents, specifically the young, government employed and the urban community consider environmental issues to be serious, especially in relation to air pollution and water pollution. Furthermore, many residents feel it is important to rank environmental problems that are related to other social and economic issues, and that environmental protection must be set as a priority in Wujin County. Compared to social issues, environmental concern was greater among the young, government employed, and the urban community, because of their higher education and affluence. In addition, 66.2% of residents consider environmental protection to be more important than economic development. Thus, environmental protection must be set as a high priority in Wujin County, in order to face the many social and environmental challenges inherent in development.

Keywords： socio-economic characteristics environmental perception sustainable development policy making

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Survey on deep learning for pulmonary medical imaging

Jiechao Ma, Yang Song, Xi Tian, Yiting Hua, Rongguo Zhang, Jianlin Wu

Frontiers of Medicine 2020, Volume 14, Issue 4, Pages 450-469 doi: 10.1007/s11684-019-0726-4

Abstract: As a promising method in artificial intelligence, deep learning has been proven successful in several domains ranging from acoustics and images to natural language processing. With medical imaging becoming an important part of disease screening and diagnosis, deep learning-based approaches have emerged as powerful techniques in medical image areas. In this process, feature representations are learned directly and automatically from data, leading to remarkable breakthroughs in the medical field. Deep learning has been widely applied in medical imaging for improved image analysis. This paper reviews the major deep learning techniques in this time of rapid evolution and summarizes some of its key contributions and state-of-the-art outcomes. The topics include classification, detection, and segmentation tasks on medical image analysis with respect to pulmonary medical images, datasets, and benchmarks. A comprehensive overview of these methods implemented on various lung diseases consisting of pulmonary nodule diseases, pulmonary embolism, pneumonia, and interstitial lung disease is also provided. Lastly, the application of deep learning techniques to the medical image and an analysis of their future challenges and potential directions are discussed.

Keywords： deep learning neural networks pulmonary medical image survey

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Sustaining health workforce recruitment and retention in township hospitals: a survey on 110 directors

Jingmin Zheng,Jie Li,Xingxing Jiang,Bin Zhang

Frontiers of Medicine 2015, Volume 9, Issue 2, Pages 239-250 doi: 10.1007/s11684-015-0392-0

Abstract: First, a survey on 120 directors of township hospitals was conducted to learn the latest status of healthSecond, after sending these problems back to the directors, an open-ended pen-and-paper survey was conductedFive problems from the questionnaire survey were recognized, and numbers of thematic factors were identifiedat the individual, professional, and treatment environment from the pen-and-paper survey and focus group

Keywords： recruitment retention health workers township hospitals rural regions