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agricultural water saving countermeasures and feasibility of implementing semi-dryland farming in the Huang-Huai-HaiRegion

Shan Lun,Wu Pute ,Kang Shaozhong,  Feng Hao ,Zhang Suiqi

Strategic Study of CAE 2011, Volume 13, Issue 4,   Pages 37-42

Abstract: justify;">Starting from fully excavating the potential of various agricultural water resources in the HuangHuai Hai Region, the achievement, experience and existing problems about agricultural water saving wereresources shortage and meanwhile for achieving sustainable growth of agricultural production in this regiondryland farming will exist at the same time as the new structure of agricultural water use in this regionBy implementing these measures, field irrigation water consumption in this region is expected to reduce

Keywords： The Huang Huai Hai Region     agricultural water saving     semi dryland farming     water resources potential    

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Spatial Variability and Distribution of Nitrate Content of Shallow Groundwater in Huang-Huai-Hai Plain

Li Baoguo,Bai Youlu,Hu Kelin,Huang Yuanfang,Chen Deli

Strategic Study of CAE 2001, Volume 3, Issue 4,   Pages 42-45

Abstract:

The spatial variability and distribution of NO3- N in shallow groundwater in Huang-Huai-Haiof NO3—N concentration over 20 mg· L-1 was about 10% of the whole Huang-Huai-HaiNO3-N content in the range of 10—20 mg·L-1 was distributed in the regionXuzhou to Lianyungang in Jiangsu Province and Weifang,in Shandong Provence, which was about 11.5% of the Huang-Huai-Haiincreasing water and fertilizer utilization efficiency and to the sustaining agricultural development in Huang-Huai-Hai

Keywords： Huang-Huai-Hai Plain     groundwater     nitrate     spatial distribution    

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Research on the Relationship between Personal-Organizational Values Fit and Job Involvement of the New Generation of Employees

Ai-hua Huang,Guo-tao Guo,Hai-xia Qiu

Frontiers of Engineering Management 2015, Volume 2, Issue 1,   Pages 31-34 doi: 10.15302/J-FEM-2015005

Abstract: To improve the management of the new generation of employees, the authors have discussed the relationship between the personal-organizational values fit and job involvement of the new generation of employees, and made perceived organizational support as a mediating variable. The empirical results found that the personal-organizational values fit had a significant positive effect on job involvement of the new generation of employees and the perceived organizational support became as the mediating variable.

Keywords： personal-organizational values fit     job involvement     perceived organizational support     new generation of employees    

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Inheritance and Innovation of Engineering Management Informatization

Kai Sun,Ren-huai Liu

Frontiers of Engineering Management 2014, Volume 1, Issue 1,   Pages 76-82 doi: 10.15302/J-FEM-2014014

Abstract: In the life-cycle of large projects, the operational phase lasts the longest, costs the most and substantially benefits the project. During the whole phase, energy, material and human resources may cost a lot. Effective control of such costs is one of the main targets of engineering management informatization. How to lower the organization collaboration cost in project management and how to support effective collaboration among different areas, organizations and departments in the ways of technology and management are major goals in engineering management informatization. In the phase of project operation, project owners, partners and customers are the stakeholders of engineering management informatization. Through the case of airport management informatization, inherited and innovation of engineering management informatization will be discussed. It is illustrated that airport informatization is the innovation of business model and technology applications through the analysis and study on cases of airport informatization.

Keywords： engineering management     informatization     inter-organizational relationship     management creation     resource sharing    

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Alluvial channel hydrodynamics around tandem piers with downward seepage

Rutuja CHAVAN, Wenxin HUAI, Bimlesh KUMAR

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1445-1461 doi: 10.1007/s11709-020-0648-x

Abstract: A strong wake region was observed behind the piers, but the vortex strength diminished with downwardQuadrant analysis was used to recognize the susceptible region for sediment entrainment and deposition

Keywords： scour     seepage     Strouhal number     tandem arrangement     turbulent characteristics    

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Parallel Authentication Modes Based on Double Blocks or Key Counter

Huang Yuhua,Huai Aiqun,Song Yubo

Strategic Study of CAE 2004, Volume 6, Issue 7,   Pages 70-74

Abstract:

The CBC - MAC mode is not a parallel one. A parallel authentication mode (PKCB) based on double blocks was put forward in this paper. The PKCB mode had a marked improvement on security & speed over parallel authentication mode, PMAC. And it may be combined with the CTR (counter) encryption mode to form a full block cipher mode. On this ground, another parallel authentication mode (KCTR - MAC) based on key counter was advanced. As compared with the PMAC mode, the KCTR - MAC mode had a marked improvement on security, while its speed did not become lower. The KCTR - MAC authentication mode may be combined with the CTR (counter) encryption mode to form a full block cipher mode (2CTR)，too. The 2CTR mode had a performance advantage over the standard mode, CCM (CTR with CBC - MAC). And it was a fast, practicable mode with security.

Keywords： authentication mode     CBC - MAC mode     PMAC mode     CTR mode     CCM mode    

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A Fast Evaluation and Research Method for Exploration Potential of Oversea Basins

Hong-quan Kang,Yun-hua Deng,Huai-cun Jia,Tao Cheng,Bo Bai

Frontiers of Engineering Management 2016, Volume 3, Issue 4,   Pages 338-342 doi: 10.15302/J-FEM-2016052

Abstract: Oversea hydrocarbon exploration always faces some problems, such as multiple basin types, different exploration prospects, various exploration degrees, diverse data quantities and geological recognitions. This paper focuses on overseas basins with different exploration degrees and offers a new evaluation system and research method for fast evaluation and risk analysis on hydrocarbon potential. Based on the theory of probability, this new evaluation system evaluates each parameter and core accumulation factor with comprehensive and quantitative assignment, to accelerate geological evaluation. In addition, this paper suggests that source rock evaluation should be the core criterion in screening evaluation of poor-explored basins, and also proposes that both the exploration potential and geological recognition should drive the evaluation for basins with high exploration degrees. This new system and method, which is an effective system for fast basin evaluation, is suggested to be used in oversea evaluation and decision-making objectively, scientifically and efficiently.

Keywords： geological risk analysis     probability model     evaluation factors     oversea exploration     hydrocarbon exploration    

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Boundedness of Marcinkiewicz integralwith rough kernel onTriebel-Lizorkin spaces

Chun-jie ZHANG,Fang-fang REN,Yu-huai ZHANG,Gui-lian GAO

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 8,   Pages 654-657 doi: 10.1631/FITEE.1500082

Abstract: This paper is a continuation of our previous work (Zhang and Chen, 2010b). Following the same general steps of the proof there, we make essential improvement on our previous theorem by recalculating a key inequality. Our result shows that the Marcinkiewicz integral, with a bounded radial function in its kernel, is still bounded on the Triebel-Lizorkin space.

Keywords： Marcinkiewicz integral     Triebel-Lizorkin spaces    

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Characterization of submicron aerosols in the urban outflow of the central Pearl River Delta region of

Zhaoheng GONG, Zijuan LAN, Lian XUE, Liwu ZENG, Lingyan HE, Xiaofeng HUANG

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 5,   Pages 725-733 doi: 10.1007/s11783-012-0441-8

Abstract: Submicron aerosol particles (with aerodynamic diameters less than 1 μm, PM ) were sampled and measured in Heshan, an urban outflow site of Guangzhou megacity in Pearl River Delta in South China, using an Aerodyne High-Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS) in November 2010 during 2010 Guangzhou Asian Games. The mean PM mass concentration measured was 47.9±17.0 μg·m during the campaign, with organic aerosol (OA) and sulfate being the two dominant species, accounting for 36.3% and 20.9% of the total mass, respectively, followed by black carbon (17.1%, measured by an aethalometer), nitrate (12.9%), ammonium (9.6%) and chloride (3.1%). The average size distributions of the species (except black carbon) were dominated by an accumulation mode peaking at ~550 nm. Calculations based on high-resolution organic mass spectrum showed that, C, H, O and N on average contributed 58.1%, 7.3%, 30.7%, and 3.9% to the total organic mass, respectively. The average ratio of organic mass over organic carbon mass (OM/OC) was 1.73±0.08. Four components of OA were identified by the Positive Matrix Factorization (PMF) analysis, including a hydrocarbon-like (HOA), a biomass burning (BBOA) and two oxygenated (SV-OOA and LV-OOA) organic aerosol components, which on average accounted for 18.0%, 14.3%, 28.8% and 38.9% of the total organic mass, respectively.

Keywords： organic aerosol     high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS)     positive matrix factorization    

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Augmentation of natural convective heat transfer by acoustic cavitation

Jun CAI, Xiulan HUAI, Shiqiang LIANG, Xunfeng LI,

Frontiers in Energy 2010, Volume 4, Issue 3,   Pages 313-318 doi: 10.1007/s11708-009-0064-3

Abstract: An experimental study was conducted to investigate the effects of acoustic cavitation on natural convective heat transfer from a horizontal circular tube. The experimental results indicated that heat transfer could be enhanced by acoustic cavitation and had the best effect when the head of the ultrasonic transducer was over the midpoint of the circular tube, and the distance between the head and the tube equaled 15 mm. The augmentation at low heat flux was better than that in the case of high heat flux. Based on experimental results, the correlation formula of Nusselt number for water was obtained.

Keywords： heat transfer enhancement     augmentation     acoustic cavitation     acoustic streaming     convective heat transfer    

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Special feature on computational photography Editorial

Qiong-hai DAI

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 9,   Pages 1205-1206 doi: 10.1631/FITEE.1730000

Abstract: 计算摄像学是为了突破传统成像技术局限而诞生的新兴领域，在研制新型民用相机和科学观测设备方面均有巨大潜力。过去十余年，计算摄像学在计算机视觉、图形学、光学以及信号处理等多学科交叉领域开启了新的前沿，学术界和工业界共同见证了此领域的一系列创新和重大进展。可以说，该领域充满机遇和挑战。为此，我们出版此计算摄像学专题，以推动此领域的研究。 依据视觉信号的维度，我们将计算摄像学研究分为空间结构成像、多光谱采集、相位成像以及瞬态信息记录等。计算摄像学研究也受益于光电科技的发展。为促进读者对此领域最新进展的全面了解，此专题包括8篇邀请文章，其中7篇综述——包括1篇该领域总体概述和6篇关于视觉信号不同维度计算成像方法进展的调查——以及1篇关于片上光互连近期进展的研究论文。

Keywords： None    

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Observations on pathological and histochemical changes in piglet livers infected with Taenia saginata asiatica

LINGHU Yan, ZHU Wujun, BAO Huai′en, CHEN Yan

Frontiers of Medicine 2007, Volume 1, Issue 3,   Pages 258-263 doi: 10.1007/s11684-007-0049-8

Abstract: To study the pathological and histochemical characteristics of lesions in piglet livers infected with () throughout the different stages, piglets were fed with eggs of and raised in isolation in an animal center to establish the infection model with normal piglets as control. The pathological changes in the piglet livers were observed after the infection using liver sections stained with hematoxylin and eosin. Histochemical methods were used to check the changes in lipid, glycogen and protein content in the liver. The data collected by image analysis were analyzed statistically with Statistical Package for the Social Science. The results show that -exposed piglets were indeed infected. Inflammatory reactions began on the fourth day and progressed rapidly. Kupffer cell hyperplasia, hepatic hydropic degeneration and ballooning degeneration were found in the 10th 20th days after infection. Hepatic central veins and hepatic sinusoids were dilated and congested. Spotty necrosis occurred in some local liver tissues. In the 40th–60th days, granulomatous reactions and mild hepatocirrhosis were the main lesions. In the 70th–80th days, hepatocirrhosis and bile duct proliferation were observed in the liver. In the different stages, lipid drops were increased while glycogen and protein levels were decreased to some degree. There was a significant difference in metabolism between the infected group and the control group (〈0.01). It is concluded that pigs are the favorable intermediate host of and its infection can result in serious pathological and histochemical lesions in host organs.

Keywords： hydropic degeneration     significant difference     -exposed     favorable intermediate     different    

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Digital Readout System for Micromachined Gyroscope and Analysis for its Demodulation Algorithm

ZHOU Bin, GAO Zhong-yu, CHEN Huai, ZHANG Rong, CHEN Zhi-yong

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 1,   Pages 106-110 doi: 10.1007/s11465-005-0016-5

Abstract:

A new digital readout system for micromachined gyroscope has been proposed to implement flexible parameter adjustment, improve the control performance of gyroscope, and make error compensation. By digitalizing the output of the gyroscope, this system uses a floating-type digital signal processor (DSP) to process the signal demodulation and achieve the feedback control of the gyroscope. Therefore, the small change of capacitance in the micromachined gyroscope can be detected. A new demodulation algorithm of least mean square demodulation (LMSD) has been developed inside DSP. Simulation and measurement results show that LMSD can improve 29% of the noise performance compared with the typical multiplication method. In air pressure, a kind of vibration-wheel micromachined gyroscope has achieved a noise level of 0.0073 deg s-1z(z-1/2 over the 100-Hz bandwidth by using this digital readout technology.

Keywords： demodulation algorithm     vibration-wheel micromachined     feedback     flexible parameter     pressure    

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A novel period estimation method for X-ray pulsars based on frequency subdivision

Li-rong SHEN,Xiao-ping LI,Hai-feng SUN,Hai-yan FANG,Meng-fan XUE

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 10,   Pages 858-870 doi: 10.1631/FITEE.1500052

Abstract: Period estimation of X-ray pulsars plays an important role in X-ray pulsar based navigation (XPNAV). The fast Lomb periodogram is suitable for period estimation of X-ray pulsars, but its performance in terms of frequency resolution is limited by data length and observation time. Longer observation time or oversampling can be employed to improve frequency analysis results, but with greatly increased computational complexity and large amounts of sampling data. This greatly restricts real-time autonomous navigation based on X-ray pulsars. To resolve this issue, a new method based on frequency subdivision and the continuous Lomb periodogram (CLP) is proposed to improve precision of period estimation using short-time observation data. In the proposed method, an initial frequency is first calculated using fast Lomb periodogram. Then frequency subdivision is performed near the initial frequency to obtain frequencies with higher precision. Finally, a refined period is achieved by calculating the CLP in the obtained frequencies. Real data experiments show that when observation time is shorter than 135 s, the proposed method improves period estimation precision by 1–3 orders of magnitude compared with the fast Lomb periodogram and fast Fourier transform (FFT) methods, with only a slight increase in computational complexity. Furthermore, the proposed method performs better than efsearch (a period estimation method of HEAsoft) with lower computational complexity. The proposed method is suitable for estimating periods of X-ray pulsars and obtaining the rotation period of variable stars and other celestial bodies.

Keywords： Pulsar navigation     Period estimation     Frequency subdivision     Continuous Lomb periodogram    

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Ball-disk rotor gyroscope adaptive quick-starttechnique Article

Xiao-wei LIU, Rui WENG, Hai LI, Hai-feng ZHANG

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 9,   Pages 1430-1436 doi: 10.1631/FITEE.1600035

Abstract: Rotating speed is a critical parameter affecting the performanceof rotor gyroscopes. Rotor gyroscopes must operate at the rated rotatingspeed. To shorten the start time of the ball-disk rotor gyroscope,this paper presents a new design of the drive system for a ball-diskrotor gyroscope. The drive system is monitored by a microcontroller.First, the microcontroller generates a sine pulse width modulationsignal to drive the permanent magnet rotor. Second, the position ofthe rotor is detected according to the back electromotive force inthe non-energized coil. Third, a piecewise closed-loop control algorithmis implemented to keep the angular acceleration of the rotor withinthe safe range automatically during the acceleration process and whenrunning at a constant speed. This control algorithm can avoid rotorstalling due to loss of steps. Experimental result shows that withthe help of adaptive quick-start technique, the start time of thedevice can be shortened by up to 36.6%.

Keywords： Rotor gyroscope     Magnetically driven     Quick start     Piecewise algorithm     Closed-loop control    

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Title Author Date Type Operation

agricultural water saving countermeasures and feasibility of implementing semi-dryland farming in the Huang-Huai-HaiRegion

Shan Lun,Wu Pute ,Kang Shaozhong,  Feng Hao ,Zhang Suiqi

Journal Article

Spatial Variability and Distribution of Nitrate Content of Shallow Groundwater in Huang-Huai-Hai Plain

Li Baoguo,Bai Youlu,Hu Kelin,Huang Yuanfang,Chen Deli

Journal Article

Research on the Relationship between Personal-Organizational Values Fit and Job Involvement of the New Generation of Employees

Ai-hua Huang,Guo-tao Guo,Hai-xia Qiu

Journal Article

Inheritance and Innovation of Engineering Management Informatization

Kai Sun,Ren-huai Liu

Journal Article

Alluvial channel hydrodynamics around tandem piers with downward seepage

Rutuja CHAVAN, Wenxin HUAI, Bimlesh KUMAR

Journal Article

Parallel Authentication Modes Based on Double Blocks or Key Counter

Huang Yuhua,Huai Aiqun,Song Yubo

Journal Article

A Fast Evaluation and Research Method for Exploration Potential of Oversea Basins

Hong-quan Kang,Yun-hua Deng,Huai-cun Jia,Tao Cheng,Bo Bai

Journal Article

Boundedness of Marcinkiewicz integralwith rough kernel onTriebel-Lizorkin spaces

Chun-jie ZHANG,Fang-fang REN,Yu-huai ZHANG,Gui-lian GAO

Journal Article

Characterization of submicron aerosols in the urban outflow of the central Pearl River Delta region of

Zhaoheng GONG, Zijuan LAN, Lian XUE, Liwu ZENG, Lingyan HE, Xiaofeng HUANG

Journal Article

Augmentation of natural convective heat transfer by acoustic cavitation

Jun CAI, Xiulan HUAI, Shiqiang LIANG, Xunfeng LI,

Journal Article

Special feature on computational photography

Qiong-hai DAI

Journal Article

Observations on pathological and histochemical changes in piglet livers infected with Taenia saginata asiatica

LINGHU Yan, ZHU Wujun, BAO Huai′en, CHEN Yan

Journal Article

Digital Readout System for Micromachined Gyroscope and Analysis for its Demodulation Algorithm

ZHOU Bin, GAO Zhong-yu, CHEN Huai, ZHANG Rong, CHEN Zhi-yong

Journal Article

A novel period estimation method for X-ray pulsars based on frequency subdivision

Li-rong SHEN,Xiao-ping LI,Hai-feng SUN,Hai-yan FANG,Meng-fan XUE

Journal Article

Ball-disk rotor gyroscope adaptive quick-starttechnique

Xiao-wei LIU, Rui WENG, Hai LI, Hai-feng ZHANG

Journal Article