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| 1 | Enhanced and irreversible sorption of pesticide pyrimethanil by soil amended with biochars显示文摘Biochar derived from partial combustion of vegetation is ubiquitous and potentially effective in sequestration of environmental contaminants.Biochars were prepared by burning of red gum(Eucalyptus spp.) woodchips at 450 and 850°C(labeled as BC450 and BC850).These two biochars were found to possess markedly different properties in terms of surface area and porosity.Short-term equilibration tests(24 hr) were conducted to assess the sorption-desorption behavior of pyrimethanil in the soil amended with various amounts of biochar of each type,with a special focus on the desorption behavior of the sorbed pesticide through four times successive desorption by dilution.Sorption coefficient and isotherm nonlinearity of the amended soils progressively increased with the content of biochar in the soil.Biochar BC850 with higher surface area and microporosity showed a stronger effect on the reversibility of sorption pesticide.The soils amended with 5% BC450 and 1% BC850 had nearly the same sorption capacity for pyrimethanil;however,their desorption processes were very different with 13.65% and 1.49% of the sorbed pesticide being released,respectively.This study suggested that biochar in soil could be an important factor for immobilization of a pesticide and thus affecting its environment fate in soil. | Xiangyang Yu Ligang Pan Guangguo Ying Rai S. Kookana | 2010 | Journal of Environmental Sciences2010，22，4： | 19 |
| 2 | Performance of multiuser CDMA system with space-time block coding in MIMO Rayleigh fading channels显示文摘In this paper, by introducing orthogonal space-time coding scheme, the multiuser CDMA systems with different space time codes are given, and corresponding system performance is investigated over Rayleigh fading channel. A low-complexity multiuser receiver scheme is developed for space-time coded CDMA systems. The scheme can make full use of the complex orthogonality of space-time coding to simplify the high decoding complexity of the existing scheme. Compared to the existing scheme with exponential decoding complexity, it has linear decoding complexity. Based on the performance analysis and mathematical calculation, average bit error rate (BER) of the system is derived in detail, and tight closed-form approximation expressions of BER are attained. Simulation results on average BER are in agreement with the theory analysis. The results show that the proposed scheme can achieve almost the same performance as the existing scheme. Moreover, on the condition of same system throughput and concatenation of channel code, the given full-rate space-time coded CDMA system has lower BER than the full-diversity space-time coded CDMA systems. | YU XiangBin DONG Tao BI GuangGuo | 2009 | Science in China(Series F)2009，52，12： | 3 |
| 3 | Performance of orthogonal STBC-MIMO with variable-power adaptive modulation and delayed feedback in Nakagami fading channels显示文摘A variable-power(VP)adaptive modulation(AM)scheme with space-time block code(STBC)is developed in MIMO systems,and the corresponding performance is investigated in Nakagami fading channels.The optimum switching thresholds are derived so that the spectrum efciency(SE)under an average power and a target bit error rate(BER)constraint is maximized.By the switching thresholds,average BER and SE are further derived.As a result,closed-form expressions are obtained.Besides,the exact and approximate BER expressions of VP AM and constant-power(CP)AM systems with delayed feedback are respectively derived.Simulation results show that the theoretical SE and BER can match the corresponding simulation well.The results indicate that VP-AM with STBC provide higher spectrum efciency than the CP counterparts,and has slighter bite error rate performance degradation when the normalized delay is less than 0.01. | YU XiangBin CHEN XiaoMin BI GuangGuo RUI Yun | 2013 | Science China(Information Sciences)2013，56，10： | 2 |
| 4 | Unsolvable block transitive automorphism groups of 2- ( v, k, 1 ) ( k = 6,7, 8,9 ) designs 显示文摘 | Han Guangguo | 2008 | Discrete Math2008，，8： | 1 |
| 5 | UPLINK PERFORMANCE OF CWP-MC-CDMA WITH SPACE DIVERSITY COMBINING TECHNIQUE OVER RAYLEIGH FADING CHANNEL显示文摘In this paper, a Complex Wavelet Packet based Multi-Carrier Code Division Multiple Access (CWP-MC-CDMA) system uplink model is proposed, based on the analysis of the principle of MC-CDMA and the use of the optimized complex wavelet packet. Considering that the base station can adopt multiple re-ceiver antennas in the uplink, we employ the Space Diversity Combining (SDC) technique to improve the sys-tem performance via multiple antennas. The uplink performance of proposed CWP-MC-CDMA system with SDC technique is investigated over Rayleigh fading channel, and corresponding bit error rate analysis is given in detail. The system can avoid the decrease of spectrum efficiency of conventional MC-CDMA due to insert-ing cyclic prefix. Theoretical analysis and simulation result show that the application of SDC technique can improve the CWP-MC-CDMA system ability to combat spatial fading and various interferences effectively. Moreover, the proposed system based on SDC technique has superior Bit Error Rate (BER) performance over the Discrete Fourier Transform (DFT) and SDC based MC-CDMA system and the real wavelet packet and SDC based MC-CDMA system. | Yu Xiangbin Zhang Xiaodong Xu Dazhuan Bi Guangguo | 2006 | Journal of Electronics(China)2006，23，6： | 1 |
| 6 | Sorption and desorption behaviors of diuron in soils amended with charcoal显示文摘 | YU XIANGYANG YING GUANGGUO KOOKANA R S | 2006 | Journal of Agricultural Food and Chemistry2006，54，22： | 1 |
| 7 | Triclosan in wastewaters and biosolids from Australian wastewater treatment plants显示文摘 | YING Guangguo RAI S K | 2007 | Environmental International2007，33，2： | 1 |
| 8 | Trends in the occurrence of human and veterinary antibiotics in the sediments of the Yellow River, Hai River and Liao River in northern China 显示文摘 | Zhou Lijun Ying Guangguo Zhao Jianliang | 2011 | Environmental Pollution2011，159，7： | 1 |
| 9 | Determi- nation of phenolic endocrine disrupting chemicals and acidic pharmaceuticals in surface water of the Pearl Rivers in South China by gas chromatography-negative chemical ionization- mass spectrometry显示文摘 | ZHAO Jianliang YING Guangguo WANG Li | 2009 | Science of the Total Environment2009，407，2： | 1 |
| 10 | Adaptive multiehannel DFE combined with space diversity for WPMA systems 显示文摘 | Zhang Xiaodong Zhang Guoan and Bi Guangguo | 2000 | Electronics letters2000，36，16： | 1 |
| 11 | Spatial and seasonal distribution of selected antibiotics in surface waters of the Pearl Rivers, China 显示文摘 | Yang Jifeng Ying Guangguo Zhao Jianliang | 2011 | Journal of Environmental Science and Health2011，46，3： | 1 |
| 12 | Fate,behavior and effects of suffactants and their degradation products in the environment显示文摘 | | 2006 | Environment International2006，32，3： | 1 |
| 13 | Determination of phenolic endocrine disrupting chemicals and acidic pharmaceuticals in surface water of the Pearl Rivers in South China by gas chromatography-negative chemical ionization-mass spectrometry显示文摘 | ZHAO Jianliang YING Guangguo WANG Li | 2009 | Science of the Total Environment2009，407，2： | 1 |
| 14 | Simultaneous determination and assessment of 4-nonylphenol, bisphenol A and triclosan in tap water, bottled water and baby bottles显示文摘 | LI Xu YING Guangguo SU Haochang | 2010 | Environment International2010，36，6： | 1 |
| 15 | Influence of biochars on plant uptake and dissipation of two pesticides in an agricultural soil显示文摘 | Yang Xiaobing Ying Guangguo Peng Pingan | 2010 | Journal of Agricultural and Food Chemistry2010，58，13： | 1 |
| 16 | Biological degradation of trielocarban and triclosan in a soil under aerobic and anaerobic conditions and comparison with environmental fate modeling显示文摘 | YING Guangguo YU Xiangyang RAI S K | 2007 | Environmental Pollution2007，150，3： | 1 |
| 17 | Determination of biocides in different environmental matrices by use of ultra-high-performance liquid chromatography-tandem mass spectrometry 显示文摘 | CHEN Zhifeng Y1NG Guangguo LAI Huajie | 2012 | Analytical and Bioanalytical Chemistry2012，404，10： | 1 |
| 18 | Kinetics modeling and reaction mechanism of ferrate ( VI ) oxidation of benzotriazoles显示文摘 | YANG Bin YING Guangguo ZHANG Lijuan | 2011 | Water Res2011，45，6： | 1 |
| 19 | Detection of antibiotic resistance and tetracycline resistance genes in Enterobacteriaceae isolated from the Pearl rivers in South China显示文摘 | Ran T Guangguo Y Haochang S | 2010 | Environmental Pollution2010，158，： | 1 |
| 20 | Adaptive wavelet packet transform-based narrowband interference canceller in DSSS systems显示文摘 | Yang Weimin Bi Guangguo | 1997 | IEEE Electronics Letters1997，33，14： | 1 |
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