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| 1 | Soil microbial community structure and function responses to successive planting of Eucalyptus显示文摘Many studies have shown soil degradation after the conversion of native forests to exotic Eucalyptus plantations. However, few studies have investigated the long-term impacts of short-rotation forestry practices on soil microorganisms. The impacts of Eucalyptus successive rotations on soil microbial communities were evaluated by comparing phospholipid fatty acid(PLFA) abundances,compositions, and enzyme activities of native Pinus massoniana plantations and adjacent 1st, 2nd, 3rd, 4th generation Eucalyptus plantations. The conversion from P. massoniana to Eucalyptus plantations significantly decreased soil microbial community size and enzyme activities, and increased microbial physiological stress. However, the PLFA abundances formed '∪' shaped quadratic functions with Eucalyptus plantation age. Alternatively, physiological stress biomarkers, the ratios of monounsaturated to saturated fatty acid and Gram+ to Gram- bacteria, formed '∩' shaped quadratic functions, and the ratio of cy17:0 to 16:1ω7c decreased with plantation age. The activities of phenol oxidase, peroxidase, and acid phosphatase increased with Eucalyptus plantation age, while the cellobiohydrolase activity formed '∪' shaped quadratic functions. Soil N:P, alkaline hydrolytic nitrogen, soil organic carbon, and understory cover largely explained the variation in PLFA profiles while soil N:P, alkaline hydrolytic nitrogen, and understory cover explained most of the variability in enzyme activity. In conclusion, soil microbial structure and function under Eucalyptus plantations were strongly impacted by plantation age. Most of the changes could be explained by altered soil resource availability and understory cover associated with successive planting of Eucalyptus. Our results highlight the importance of plantation age for assessing the impacts of plantation conversion as well as the importance of reducing disturbance for plantation management. | Falin Chen Hua Zheng Kai Zhang Zhiyun Ouyang Huailin Li Bing Wu Qian Shi | 2013 | Journal of Environmental Sciences2013，25，10： | 12 |
| 2 | Sea surface height measuring using InSAR altimeter显示文摘Satellite altimetry has been widely used in measuring ocean topography from space.The conventional altimeter system is the nadir radar altimeter system which has the limitations of one-dimensional measurement and is unable to get both high temporal and spatial resolution.The InSAR altimetry system using InSAR altimeter instead of nadir radar altimeter is an improvement which can get both high cross-track and along-track resolution and wide swath.However,the conventional SAR interferometry only can achieve meter level height accuracy.This paper focuses on a method of radar echo-tracking for InSAR altimeter system in order to correct the slant range measurements and finally to improve the height measurement accuracy to several centimeters' level.Radar slant range(from observed pixels to radar antenna) estimation error affects the height measurement accuracy badly,nevertheless not considered in the conventional SAR interferometry.The proposed method is ameliorated based on the traditional echo-model used in nadir radar altimeter system,focusing on the echo signals from observed pixels with different incident angles.Simulations of sea surface height measurements are performed in the last part of this paper,and the conclusions are drawn that,with corrected slant range,the accuracy of InSAR altimetry can be much better than the conventional SAR interferometry. | Xiaohong Sui Running Zhang Falin Wu Yang Li Xiaoyun Wan | 2017 | Geodesy and Geodynamics2017，8，4： | 1 |
| 3 | Analysis of thermal and water management with temperature -dependent diffusion effects in membrane of proton exchange membrane fuel ceils 显示文摘 | Yan Weimon Chen Falin Wu Hungyi | 2004 | Journal of Power Sources2004，129，： | 1 |
| 4 | GPS Signal Acquisition and Tracking Using Software GPS Receiver 显示文摘 | WU Falin ZHANG Kefei YASUDA A | 2005 | IEEE2005，152，2： | 1 |
| 5 | Analysis of thermal and water management with temperature-dependent diffusion effects in membrane of proton exchange membrane fuel cells显示文摘 | WEI MON YAN FALIN CHEN HUNG-YI WU | 2004 | Journal of Power Sources2004，129，： | 1 |
| 6 | Analysis of thermal and water management with temperature-dependent diffusion effects in membrane of proton exchange membrane fuel cells显示文摘 | Yan Weimon Chen Falin Wu Hungyi | 2004 | Journal of Power Sources2004，129，： | 1 |
| 7 | A study of hybrid modernized GPS and Galileo positioning in Japan 显示文摘 | Wu Falin Kubo Nobuaki Yasuda Akio | 2003 | Journal of Japan Institute of Navigation2003，109，9： | 1 |
| 8 | LNA Design for Future S Band Satellite Navigation and 4G LTE Applications显示文摘A good design of LNA for S band satellite navigation receivers and 4G LTE wireless communication system has been implemented in this paper.Due to increased congestion in the present L band,the S Band frequency from 2483.5-2500 MHz has been allocated for the future satellite navigation systems.For this purpose ATF-34143 amplifier(pHEMT)having high electron mobility and fast switching response has been chosen due to its very low Noise Figure(NF).The amplifier has been designed having bandwidth of 0.8 GHz from 1.8-2.6 GHz.Because of the large bandwidth,the amplifier could serve many wireless communication applications including 4G LTE mobile communication at 2.1 GHz.The design was implemented using the micro strip technology offering extremely low noise figure of 0.312 dB and 0.377 dB for 2.1 GHz and 2.49 GHz respectively.The gain of the amplifier was low and found to be 10.281 dB and 9.175 dB.For the purpose of increasing the gain of an amplifier,the proposed LNA design was then optimized by using Wilkinson Power Divider(WPD).The Balanced LNA design using WPD offered very low noise figure of 0.422 dB and 0.532 dB respectively and the gain was considerably increased and was found to be 20.087 dB and 17.832 dB respectively against 2.1 GHz and 2.49 GHz.Simulations and measurements were taken in Agilent Advanced Design System(ADS)software.The suggested LNA can be used for a variety of wireless communications applications including the future S band satellite navigation systems. | Muhammad Arsalan Falin Wu | 2019 | Computer Modeling in Engineering & Sciences2019，，5： | 0 |
| 9 | An Improved Dictionary Cracking Scheme Based on Multiple GPUs for Wi-Fi Network显示文摘The Internet has penetrated all aspects of human society and has promoted social progress.Cyber-crimes in many forms are commonplace and are dangerous to society and national security.Cybersecurity has become a major concern for citizens and governments.The Internet functions and software applications play a vital role in cybersecurity research and practice.Most of the cyber-attacks are based on exploits in system or application software.It is of utmost urgency to investigate software security problems.The demand for Wi-Fi applications is proliferating but the security problem is growing,requiring an optimal solution from researchers.To overcome the shortcomings of the wired equivalent privacy(WEP)algorithm,the existing literature proposed security schemes forWi-Fi protected access(WPA)/WPA2.However,in practical applications,the WPA/WPA2 scheme still has some weaknesses that attackers exploit.To destroy a WPA/WPA2 security,it is necessary to get a PSK pre-shared key in pre-shared key mode,or an MSK master session key in the authentication mode.Brute-force cracking attacks can get a phase-shift keying(PSK)or a minimum shift keying(MSK).In real-world applications,many wireless local area networks(LANs)use the pre-shared key mode.Therefore,brute-force cracking of WPA/WPA2-PSK is important in that context.This article proposes a new mechanism to crack theWi-Fi password using a graphical processing unit(GPU)and enhances the efficiency through parallel computing of multiple GPU chips.Experimental results show that the proposed algorithm is effective and provides a procedure to enhance the security of Wi-Fi networks. | Majdi K.Qabalin Zaid A.Arida Omar A.Saraereh Falin Wu Imran Khan Peerapong Uthansakul Moath Alsafasfeh | 2021 | Computers, Materials & Continua2021，，3： | 0 |
| 10 | Challenges and improvement in management of neonates born to mothers with COVID-19 in China显示文摘Objective:China was the first country suffering from the SARS-CoV-2 pandemic and one of the countries with stringent mother-neonate isolation measure implemented.Now increasing evidence suggests that coronavirus disease 2019(COVID-19)should not be taken as an indication for formula feeding or isolation of the infant from the mother.Methods:We conducted a retrospective cohort study in 44 hospitals from 14 provinces in China to investigate the management of neonates whose mothers have confirmed or suspected COVID-19.In addition,65 members of Chinese Neonatologist Association(CNA)were invited to give their comments and suggestions on the clinical management guidelines for high-risk neonates.Results:There were 121 neonates born to 118 mothers suspected with COVID-19 including 42 mothers with SARS-CoV-2 positive results and 76 mothers with SARS-CoV-2 negative results.All neonates were born by caesarean section,isolated from their mothers immediately after birth and were formula-fed.Five neonates were positive for SARSCoV-2 at initial testing between 36 and 46 h after birth.Regarding the confusion on the clinical management guidelines,58.78%of the newborns were put into isolation,32.22%were subject to PCR tests,and 5.16%and 2.75%received breastfeeding and vaccination,respectively.Conclusion:The clinical symptoms of neonates born to mothers with confirmed SARS-CoV-2 were mild,though five neonates might have been infected in utero or during delivery.Given the favorable outcomes of neonates born to COVID-confirmed mothers,full isolation may not be warranted.Rather,separation of the mother and her newborn should be assessed on a case-by-case basis,considering local facilities and risk factors for adverse outcomes,such as prematurity and fetal distress. | Jie Yang Zhuxiao Ren Lingkong Zeng Shiwen Xia Lin Wang Jiayu Miao Zhe Zhao Chuanzhong Yang Xiuyong Cheng Huayan Zhang Yuanfang Zhu Li Liu Xirong Gao Bin Yi Zhenlang Lin Wei Liu Xiaoyu Zhou Benqing Wu Ling Chen Zhankui Li Xuefeng Zhang Wei Lu Lianhong Zhang Xiao Chen Xiaoyun Zhong Falin Xu Jinhui Wu Yong Ji Jiahua Pan Yanxiang Chen Carine Ronsmans Zhichun Feng | 2022 | Frigid Zone Medicine2022，2，2： | 0 |
| 11 | Efcient Algorithms for Cache-Throughput Analysis in Cellular-D2D 5G Network显示文摘In this paper,we propose a two-tiered segment-based Device-toDevice(S-D2D)caching approach to decrease the startup and playback delay experienced by Video-on-Demand(VoD)users in a cellular network.In the S-D2D caching approach cache space of each mobile device is divided into two cache-blocks.The rst cache-block reserve for caching and delivering the beginning portion of the most popular video les and the second cacheblock caches the latter portion of the requested video les‘fully or partially’depending on the users’video watching behaviour and popularity of videos.In this approach before caching,video is divided and grouped in a sequence of xed-sized fragments called segments.To control the admission to both cacheblocks and improve the system throughput,we further propose and evaluate three cache admission control algorithms.We also propose a video segment access protocol to elaborate on how to cache and share the video segments in a segmentation based D2D caching architecture.We formulate an optimisation problem and nd the optimal cache probability and beginning-segment size that maximise the cache-throughput probability of beginning-segments.To solve the non-convex cache-throughout maximisation problem,we derive an iterative algorithm,where the optimal solution is derived in each step.We used extensive simulations to evaluate the performance of our proposed S-D2D caching system. | Nasreen Anjum Zhaohui Yang Imran Khan Mahreen Kiran Falin Wu Khaled Rabie Shikh Muhammad Bahaei | 2021 | Computers, Materials & Continua2021，，5： | 0 |
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