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High throughput bandwidth optimized VLSI design for motion compensation in AVS HDTV decoder

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第6期9卷 822-832页

作者： Kai LUO Dong-xiao li ming ZHANG Department of lnformation Science and Electronic Engineering Zhejiang University Hangzhou 310027 China

In this paper we present a motion compensation (MC) design for the newest Audio Video coding Standard (AVS) of China. Because of compression-efficient techniques of variable block size (VBS) and sub-pixel interpolation, intensive pixel calculation and huge memory access are required. We propose a parallel serial filtering mixed luma interpolation data flow and a three-stage multiplication free chroma interpolation scheme. Compared to the conventional designs, the integrated architecture supports about 2.7 times filtering throughput. The proposed MC design utilizes Vertical Z processing order for reference data re-use and saves up to 30% memory bandwidth. The whole design requires 44.3k gates when synthesized at 108 MHz clock frequency using 0.18-μm CMOS technology and can support up to 1920×1088@30 fps AVS HDTV video decoding.

关键词： Audio Video coding Standard (AVS) Motion compensation (MC) Interpolation VLSI Architecture

A novel technology for quick acclimation of an anaerobic microbial consortia used for biodegrading teraphthalic acid (TA)

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Journal of Environmental Sciences 2002年第2期14卷 204-209页

作者： li xiao ming ZENG Guang-ming CHEN Jian LUN Shi yi Department of Environmental Science and Engineering Hunan UniversityChangsha 410082China School of Biotechnology Wuxi University of Light IndustryWuxi 214036China

The seed sludge originated from a methane fermentation reactor was enriched and acclimated with TA as sole carbon source under nitrate respiration mode first for 6 week, and then can be turned to methane fermentation conditions. After 6 weeks processing, the specific rate of TA degradation under nitrate respiration mode reached 23.8 mgTA/(L·gVSS), more than two times of that under methane fermentation mode 11.4 mg TA/(L·gVSS). The TA reductive cleavers' population density increased about 6 times and 20 times after 30 days and 90 days acclimation. After a total of 90 days for the enrichment and acclimation, the fermentative bacteria which originally existed in the seed sludge nearly disappeared, and instead of them, the TA reductive and cleaving bacteria group was formed in the new consortia, which was confirmed by the MPN counts and roll tube counts. Compared with the control experiment, the acclimation period can be shortened by about 50%.

关键词： acclimation anaerobic sludge enrichment nitrate terephthalic acid (TA)

Comparison of sea surface wind field measured by HY-2A scatterometer and WindSat in global oceans

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Journal of Oceanology and limnology 2019年第1期37卷 38-46页

作者： ZHENG Minwei li xiao-ming SHA Jin Key Laboratory of Digital Earth Science Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences University of Chinese Academy of Sciences Laboratory for Regional Oceanography and Numerical Modeling Qingdao National Laboratory for Marine Science and Technology Hainan Key Laboratory of Earth Observation

In this study, we present a comprehensive comparison of the sea surface wind ?eld measured by scatterometer(Ku-band scatterometer) aboard the Chinese HY-2 A satellite and the full-polarimetric radiometer WindSat aboard the Coriolis satellite. The two datasets cover a four-year period from October2011 to September 2015 in the global oceans. For the sea surface wind speed, the statistical comparison indicates good agreement between the HY-2 A scatterometer and WindSat with a bias of nearly 0 m/s and a root mean square error(RMSE) of 1.13 m/s. For the sea surface wind direction, a bias of 1.41° and an RMSE of 20.39° were achieved after excluding the data collocated with opposing directions. Furthermore,discrepancies in sea surface wind speed measured by the two sensors in the global oceans were *** is found that the larger dif ferences mainly appear in the westerlies in the both hemispheres. Both the bias and RMSE show latitude dependence, i.e., they have signi?cant latitudinal ?uctuations.

关键词： sea surface wind feld global comparisons HY-2A scatterometer polarimetric radiometer WindSat

A Theoretical Analysis of Ultraslow Optical Solitons via Exciton Spin Coherence in GaAs/AlGaAs Multiple Quantum Wells

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Chinese Physics Letters 2013年第2期30卷 210-213页

作者： YAN Wei WANG Tao li xiao-ming Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074

We show the formation of ultraslow bright and dark optical solitons in aΛ-type three-level system with a GaAs/AlGaAs multiple quantum well(MQW)structure based on the exciton spin *** propagation of the pulse across the quantum wells is studied analytically and numerically with Maxwell-Schr-dinger *** research of ultraslow optical solitons of MQWs in the present work may provide important applications in optical devices and optical communication systems.

关键词： equations. quantum solitons

Expression and functional analysis of Fa PHO1;H9 gene of strawberry(Fragaria×ananassa)

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Journal of Integrative Agriculture 2017年第3期16卷 580-590页

作者： CAO Fei li He WANG Shou-ming li xiao-ming DAI Hong-yan ZHANG Zhi-hong College of Horticulture Shenyang Agricultural University Shenyang 110866 P.R. China

Although the phosphate 1（PHO1）gene family has been implicated in inorganic phosphate transport and homeostasis,the underlying mechanism of this gene in the strawberry has not yet been *** the present study,we analyzed the expression of the PHO1;H9 gene in the strawberry（Fragaria×ananassa）,revealing the involvement of this gene in the regulation of phosphorus（P）*** coding sequence（CDS）of the PHO1;H9 gene,was isolated from the cultivated strawberry‘Sachinoka’and named as Fa PHO1;*** full-length CDS of this gene was 2 292 bp,encoding 763 amino acids,and the protein contained both SYG1/Pho81/XPR1（SPX）and ERD1/XPR1/SYG1（EXS）domains,which were involved in phosphate（Pi）***-time reverse transcription-polymerase chain reaction（RT-PCR）data suggested that the level of Fa PHO1;H9 expression was consistent with the P content in different organs,except for the ***,its expression level was also correlated with P content in fruits of different developmental *** expression of Fa PHO1;H9 was also consistent with P content in leaves under different concentrations of P fertilizer ***,transgenic Arabidopsis lines were generated,and the P content in Arabidopsis plants over-expressing Fa PHO1;H9was significantly higher than that in wild-type ***,we proposed that Fa PHO1;H9 functions in P transport.

关键词： Fragariaxananassa PHO1 H9 phosphorus expression fruits transgenic Arabidopsis

Magnesium based degradable biomaterials： A review

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Frontiers of Materials Science 2014年第3期8卷 200-218页

作者： Xue-Nan GU Shuang-Shuang li xiao-ming li Yu-Bo FAN Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education School of Biological Science and Medical Engineering Beihang University Beijing 100191 China

Magnesium has been suggested as a revolutionary biodegradable metal for biomedical applications. The corrosion of magnesium, however, is too rapid to match the rates of tissue healing and, additionally, exhibits the localized corrosion mechanism. Thus it is necessary to control the corrosion behaviors of magnesium for their practical use. This paper comprehensively reviews the research progress on the development of representative magnesium based alloys, including Mg-Ca, Mg-Sr, Mg-Zn and Mg-REE alloy systems as well as the bulk metallic glass. The influence of alloying element on their microstructures, mechanical properties and corrosion behaviors is summarized. The mechanical and corrosion properties of wrought magnesium alloys are also discussed in comparison with those of cast alloys. Furthermore, this review also covers research carried out in the field of the degradable coatings on magnesium alloys for biomedical applications. Calcium phosphate and biodegradable polymer coatings are discussed based on different preparation techniques used. We also compare the effect of different coatings on the corrosion behaviors of magnesium alloys substrate.

关键词： magnesium alloy degradable biomaterial coating degradation corrosion

Resource allocation algorithm with cross-layer design for DiffServ-based OFDM systems

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The Journal of China Universities of Posts and Telecommunications 2007年第2期14卷 45-50页

作者： li xiao-hui HAN ming YI Ke-chu TIAN Bin Key Laboratory of Integrated Services Networks Xidian University Xi'an 710071 China

According to the quality of service （QoS） requirements of differentiated service （DiffServ）, a cross-layer resource allocation algorithm for multi-user orthogonal frequency division multiplexing （OFDM） systems is presented. The constant rate is maintained by adjusting the power dynamically for the voice traffics with high priority, whereas the fairness amongst the data traffics is guaranteed by weighted fairness queued （WFQ） algorithm. The two above-mentioned strategies are used for video traffics to realize variable data rate with the constraint of the minimum rate. Combing all these methods, both the throughput and the fairness are ensured when there are multiple users in the OFDM system. Simulation results indicate the validity of the proposed algorithm, which can work well even if the SNR is less than 0 dB.

关键词： OFDM cross-layer QoS DiffServ

Spatio-Temporal Changes of Soil Salinity in Arid Areas of South Xinjiang Using Electromagnetic Induction

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Journal of Integrative Agriculture 2012年第8期11卷 1365-1376页

作者： li xiao-ming YANG Jing-song liU Mei-xian liU Guang-ming YU Mei State Key Laboratory of Soil and Sustainable Agriculture/Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 P.R China Engineering Research Center for Land Consolidation Shaanxi Provinee/Shaanxi Estate Development Service Corporation Xi'an 710075 P.R.China Water Conservancy Bureau of Yuhuatai Nanjing 210012 P.R.China

The aim of this paper was to research the spatio-temporal changes in total soluble salt content （TS） in a typical arid region of South Xinjiang, China, where the climate is arid and soil salinization happens easily. The total soluble salt content was interpreted by measurements made in the horizontal mode with EM38 and EM31. The electromagnetic induction （EM） surveys were made three times with the apparent soil electrical conductivity （ECa） measurements taken at 3 873 locations in Nov. 2008, 4 807 locations in Apr. 2009 and 6 324 locations in Nov. 2009, respectively. For interpreting the ECa measurements into total soluble salt content, calibtion sites were needed for EM survey of each time, e.g., 66 sites were selected in Nov. 2008 to measure ECa, and soils-core samples were taken by different depth layers of 0-10, 10-20 and 20-40 cm at the same time. On every time duplicate samples were taken at five sites to allevaite the local-scale variability, and soil temperatures in different layers through the profiles were also measured. Factors including TS, pH, water content, bulk density were analyzed by lab experiments. ECa calibration equations were obtained by linear regression analysis, which indicated that soil salinity was one primary concern to ECa with a determination coefficient of 0.792 in 0-10 cm layer, 0.711 in 10-20 cm layer and 0.544 in 20-40 cm layer, respectively. The maps of spatial distribution were predicted by Kriging interpolation, which showed that the high soil salinity was located near the drainage canal, which validated the trend effect caused by the irrigation canal and the drainage canal. And by comparing the soil salinity in different layers, the soluble salt accumulated to the top soil surface only in the area where the soil salinization was serious, and in the other areas, the soil salinity trended to increase from the top soil surface to 40 cm depth. Temporal changes showed that the soil salinity in November was higher than that in April,

关键词： spatio-temporal changes soil salinity South Xinjiang electromagnetic induction (EM) Kriging

Quantum Secure Direct Communication Using W State

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Communications in Theoretical Physics 2008年第6期49卷 1495-1498页

作者： DONG li XIU xiao-ming GAO Ya-Jun CHI Feng Physics Department Bohai University Jinzhou 121000 China

A theoretical scheme of quantum secure direct communication using teleportation is proposed. In the scheme, the sender needs to prepare a class of three-particle W states to use as quantum channel. The two communicators may communicate after they test the security of the quantum channel. The security of the protocol is ensured by quantum entanglement and quantum no-cloning theorem. The receiver can obtain the secret message determinately if the quantum channel is secure.

关键词： quantum information quantum secret direct communication W state