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| 1 | Simultaneous determination of ten taste and odor compounds in drinking water by solid-phase microextraction combined with gas chromatography-mass spectrometry显示文摘Taste and odor(T&O)problems in drinking water frequently occur because of many compounds present in the water,of which trans-1,10-dimethyl-trans-9-decalol(geosmin)and 2-methylisoborneol(MIB)are well-known.In this study,a fast and efective method was established for simultaneous determination of 10 T&O compounds,including geosmin,MIB,2,4,6-trichloroanisole(TCA),2-methylbenzofuran,2-isopropyl-3-methoxypyrazine(IPMP),2-isobutyl-3-methoxypyrazine(IBMP),cis-3-hexenyl acetate,trans,trans-2,4-heptadienal,trans,cis-2,6-nonadienal,and trans-2-decenal in water samples by headspace solid-phase microextraction(SPME)coupled with gas chromatography-mass spectrometry.An orthogonal array experimental design was used to optimize the efects of SPME fiber,extraction temperature,stirring rate,NaCl content,extraction time,and desorption time.The limits of detection ranged from 0.1 to 73 ng/L were lower than or close to the odor threshold concentrations(OTCs).All the 10 T&O compounds were detected in the 14 water samples including surface water,treatment process water and tap water,taken from a waterworks in Lianyungang City,China.MIB and geosmin were detected in most samples at low concentration.Six T&O compounds(IPMP,IBMP,trans,cis-2,6-nonadienal,2-methylbenzofuran,trans-2-decenal,and TCA)were efectively decreased in water treatment process(sedimentation and filtration)that is diferent from cis-3-hexenyl acetate,MIB and geosmin.It is noted that the TCA concentrations at 15.9–122.3 ng/L and the trans,cis-2,6-nonadienal concentrations at 79.9–190.1 ng/L were over 10 times higher than their OTCs in tap water.The variation of the analytes in the all water samples,especially distribution system indicated that distribution system cannot be ignored as a T&O compounds source. | Xichao Chen Qian Luo Shengguang Yuan Zi Wei Hanwen Song Donghong Wang Zijian Wang | 2013 | Journal of Environmental Sciences2013，25，11： | 21 |
| 2 | Efficient integer frequency offset estimation for OFDM systems显示文摘 | 吴贇 Ding Ming Luo Hanwen Huang Jianguo Liu Renmao | 2007 | High Technology Letters2007，13，2： | 2 |
| 3 | Dynamic small cellon/off scheduling using stackelberg game 显示文摘 | Luo Zhe Ding Ming Luo Hanwen | 2014 | IEEECommunications Letters2014，18，9： | 1 |
| 4 | Joint MMSE Transceiver Design in Non- regenerative MIMO Relay Systems显示文摘 | Wei Guan Hanwen Luo | 2008 | IEEE Communications Letters2008，12，7： | 1 |
| 5 | Efficient coding schemes with power allocation using space-time-frequency spreading显示文摘An efficient space-time-frequency (ST F) coding strategy for multi-input multi-output orthogonal frequency division multiplexing (MIMO-OFDM) systems is presented for high bit rate data transmission over frequency selective fading channels. The proposed scheme is a new approach to space-time-frequency coded OFDM (COFDM) that combines OFDM with space-time coding, linear precoding and adaptive power allocation to provide higher quality of transmission in terms of the bit error rate performance and power efficiency. In addition to exploiting the maximum diversity gain in frequency, time and space, the proposed scheme enjoys high coding advantages and low-complexity decoding. The significant performance improvement of our design is confirmed by corroborating numerical simulations. | Jiang Haining Luo Hanwen Tian Jifeng Song Wentao Liu Xingzhao | 2006 | Journal of Systems Engineering and Electronics2006，17，2： | 1 |
| 6 | Design of an Efficient FFT Processor for OFDM Systems 显示文摘 | Jiang Haining Luo Hanwen Tian Jifeng | 2005 | Consumer Electronics2005，4，51： | 1 |
| 7 | In vivo inducing collagen regeneration of biodegradable polymer microspheres显示文摘Biodegradable polymer particles have been used as dermal fillers for pre-clinical and clinical trials.The impact of material properties of polymers is very important to develop products for aesthetic medicine such as dermal fillers.Herein,eight biodegradable polymers with different molecular weights,chemical compositions or hydrophilic-hydrophobic properties were prepared and characterized for systematical study for aesthetic medicine applications.Polymer microspheres with 20-100 lmwere prepared.The in vitro degradation study showed that poly(L-lactic-co-glycolic acid)75/25 microspheres degraded the fastest,whereas poly(L-lactic acid)(PLLA)microspheres with intrinsic viscosity of 6.89([g]¼6.89)with the highest molecular weight showed the slowest degradation rate.After these microspheres were fabricated dermal fillers according to the formula of SculptraVR,they were injected subcutaneously into the back skin of rabbits.In vivo results demonstrated that the degradation rate of microspheres strongly correlated with the foreign body reaction and collagen regeneration was induced by microspheres.The microspheres with faster degradation rate induced inflammatory response and the collagen regeneration maintained in shorter time.PLLA([g]¼3.80)microsphere with a moderate molecular weight and degradation rate could strongly regenerate Type I and III collagen to maintain a long-term aesthetic medicine effect.These properties of size,morphology and degradation behavior would influence the foreign body reaction and collagen regeneration. | Yixin Zhang Hanwen Liang Qian Luo Jianlin Chen Nan Zhao Wenxia Gao Yuji Pu Bin He Jing Xie | 2021 | Regenerative Biomaterials2021，8，5： | 1 |
| 8 | MMSE precoding design in multi-user two-way MIMO relay systems显示文摘 | YI Haike ZOU Jun LUO Hanwen | 2011 | Wireless Communications and Signak Processing2011，，： | 1 |
| 9 | Joint MMSE transceiver design in non-regen- erative MIMO relay systems 显示文摘 | GUAN Wei LUO Hanwen | 2008 | IEEE Communications Letters2008，12，7： | 1 |
| 10 | Design of an Efficient FFT Processor for OFDM Systems显示文摘 | Jiang Haining Luo Hanwen Tian Jifeng | 2005 | IEEE Trans on Consumer Electronics2005，51，4： | 1 |
| 11 | J oint MMSE transceiver design in non-re- generative MIMO relay systems 显示文摘 | GUAN Wei LUO Hanwen | 2008 | IEEE Communications Letters2008，12，7： | 1 |
| 12 | Henon CSK Secure Communication System Using Chaotic Turbo Codes显示文摘In this paper, the authors design a novel chaotic secure communication system, which has high security and good error correcting capability. Firstly, the Henon Chaos Shift Keying (CSK) modulation block is presented. Secondly, chaotic turbo encoder/decoder (hard decision) is introduced. Thirdly, this chaotic secure communication system, which comprises the Henon CSK modulation block and chaotic turbo encoder in a serially concatenated form, is shown. Furthermore, a novel two step encryption scheme is proposed, which is based on the chaotic turbo encoded Henon CSK secure communication system. | 周小林 Song Wentao Liu Jianbo Luo Hanwen | 2002 | High Technology Letters2002，8，3： | 1 |
| 13 | Novel differential unitary space-time modulation schemes for fast fading channels显示文摘 | 田继锋 Jiang Haining Song Wentao Luo Hanwen | 2006 | High Technology Letters2006，12，3： | 0 |
| 14 | Effect of seeding biofloc on the nitrification establishment in moving bed biofilm reactor(MBBR)显示文摘In recirculating aquaculture systems,nitrification is usually accelerated by inoculating nitrifier or mature biocarriers.In this study,the performance of the establishment of nitrification in the MBBR according to three different strategies:conventional method(Control group A),inoculation with biofloc recovered from a tilapia biofloc culture system(Group B),and addition with extra nitrite(Group C)in the Moving bed biofilm reactor(MBBR)was compared.Among them,the biofloc-inoculated group considerably accelerated the nitrification process in the MBBR(38 d),which is roughly 18 d faster than the control group(A)(56 d)and 21 d faster than group C(59 d).Less ammonia(8 mg/L NH_(4)^(+)-N,10 mg/L in other groups)and external nitrite(2 mg/L NO_(2)��^(-)N)in the influent caused effluent ammonia to drop more slowly(5 d slower than the control group,8 d slower than the B group),which is detrimental to the nitrification process’development.Notably,the influent’s hydraulic retention time(HRT)was reduced from 12 h to 6 h following the successful establishment of nitrification.During the adaptation to reduced HRT,the MBBR inoculated with biofloc experienced short-term changes in the water quality index of the effluent water,whereas the other groups did not.The biofilm seeded with biofloc had the highest mean gray value ratio(1.42)of live/dead cell fluorescence,which grew better and could cover the entire groove under multiple microscope observations.However,the other groups did not demonstrate a similar trend.In summary,the research found that seeding biofloc use as nitrification bioaugmentation into the MBBR of the recirculating aquaculture system(RAS)to greatly speed up the nitrification process. | Hanwen Zheng Guozhi Luo Godwin Abakari Guoji Lv Hongxin Tan Wenchang Liu | 2023 | Aquaculture and Fisheries2023，8，6： | 0 |
| 15 | Design and Implementation of Single Chip WCDMA High Speed Channel Decoder显示文摘A memory and driving clock efficient design scheme to achieve WCDMA high-speed channel decoder on a single XILINX’ XVC1000E FPGA chip is presented. Using a modified MAP algorithm, say parallel Sliding Window logarithmic Maximum A Posterior (PSW-log-MAP), the on-chip turbo decoder can decode an information bit by only an average of two clocks per iteration. On the other hand, a high-parallel pipeline Viterbi algorithm is adopted to realize the 256-state convolutional code decoding. The final decoder with an 8×chip-clock (30 72MHz) driving can concurrently process a data rate up to 2 5Mbps of turbo coded sequences and a data rate over 400kbps of convolutional codes. There is no extern memory needed. Test results show that the decoding performance is only 0 2~0 3dB or less lost comparing to float simulation. | 徐友云 Li Zongwang Ruan Ming Luo Hanwen Song Wentao | 2001 | High Technology Letters2001，7，2： | 0 |
| 16 | Design and Implementation of a Novel Algorithm for Iterative Decoding of Product Codes显示文摘A novel product code iterative decoding algorithm and its high speed implementation scheme are proposed in this paper. Based on partial combination of selected columns of check matrix, the reduced-complexity syndrome decoding method is proposed to decode sub-codes of product code and deliver soft output information. So iterative decoding of product codes is possible. The fast sorting algorithm and a look-up method are proposed for high speed implementation of this algorithm. Compared to the conventional weighing iterative algorithm, the proposed algorithm has lower complexity while offering better performance, which is demonstrated by simulations and implementation analysis. The implementation scheme and verilog HDL simulation show that it is feasible to achieve high speed decoding with the proposed algorithm. | 李宗旺 Song Wentao Luo Hanwen | 2003 | High Technology Letters2003，9，1： | 0 |
| 17 | Iterative Multiuser Receiver Based on Factor Graph for Asynchronous Coded CDMA Systems显示文摘Factor graph, so named because it graphically represents function factorization, with which and its sum-product algorithm the iterative algorithm can be derived clearly. An iterative multiuser receiver based on factor graph for asynchronous coded CDMA system is proposed. In this paper, the a posteriori probability of users information bits conditioned on the noise-whitening filters output is represented by factor graphs, after numbers of iterations with the sum-product algorithm the information bits are estimated. The authors also propose a reduced complexity algorithm. Simulation results show that with this proposed receiver, near-single-user performance can be achieved, and small performance degradation for the reduced complexity algorithm with significant complexity reduction. | 张爱萍 Luo Hanwen Wang Haoxing | 2003 | High Technology Letters2003，9，1： | 0 |
| 18 | A Novel Concatenated Chaotic Communication System显示文摘A strategy for a novel concatenated chaotic communication system is presented. The transmitter system comprises chaotic turbo encoder and logistic CSK block in a serially concatenated form. Chaotic turbo code is capable of reducing bit error rate (BER) of the chaotic system in the AWGN channel. Through the chaotic turbo encoder, the coded sequence, which has quasi-chaotic properties, will be transmitted into the logistic CSK block. Having a very sensitive dependence on initial conditions of the map, the logistic CSK block can also be taken as the chaotic authentication method. The receiver, which has logistic demodulation block and chaotic decoder, is a linear asymptotic approximation to the inverse of the transmitter system. A chaotic iterative soft-decision decoding algorithm is also developed based on conventional maximum A posteriori decoding algorithm. At last, a two-step authentication method of this chaotic system is also presented. | Zhou Xiaolin, Song Wentao, Wu Dijia, Liu Jianbo & Luo Hanwen Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030, P.R.China(Received August 7, 2001) | 2002 | Journal of Systems Engineering and Electronics2002，13，2： | 0 |
| 19 | Blind channel estimation through redundant linear precoding for OFDM systems显示文摘 | 梁永明 Luo Hanwen Wu Yadong Huang Jianguo | 2007 | High Technology Letters2007，13，2： | 0 |
| 20 | Blind channel estimation for redundant precoded OFDM systems显示文摘Considering that channel estimation can play a crucial role in coherent detection of the information symbols in each data block, a blind channel estimation approach is proposed for redundant precoded orthogonal frequency-division multiplexing (OFDM) systems. A redundant linear frequency-domain precoder is applied to each pair of blocks before they enter the OFDM system. Because of the introduced structure, the frequency-selective channel can be identified at the receiver based on autocorrelation operations, singular value decomposition (SVD), and by resolving the scalar ambiguity. The proposed channel estimation method has low computational complexity and requires no prior statistical information on channel or noise. And the proposed blind method has high spectral efficiency owing to exploiting no training sequence. Computer simulations confirm that this proposed blind channel estimation method can identify the frequency-selective channels perfectly and obtain a good performance. | Liang Yongming Luo Hanwen Wu Yadong Huang Jianguo | 2007 | Journal of Systems Engineering and Electronics2007，18，4： | 0 |
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