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An optimal adaptive filtering algorithm with a polynomial prediction model

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Science China(Information Sciences) 2011年第1期54卷 153-162页

作者： tan JiaJia & zhang JianQiu Department of Electronic Engineering,Fudan University,Shanghai 200433,China 1. Department of Electronic Engineering Fudan University Shanghai 200433 China

A new approach to the optimal adaptive filtering is proposed in this *** this approach,a polynomial prediction model is used to describe the time-variant/invariant impulse response coeffcients of an identified *** the polynomial prediction model is viewed as the state equations of the identified impulse response coeffcients and the relationships between the inputs and outputs of the system are regarded as the measurements of the states,our adaptive filtering can be achieved in the framework of the Kalman filter. It is understood that Kalman filter is optimal in the sense of the MAP(maximum a posteriori),ML(most likelihood)and MMSE(minimum mean square error)under the linear and Gaussian white noise *** a result,our algorithm is also optimal in the statistical senses as Kalman filter does,provided that the impulse response coeffcients can be modeled by a *** only do the analytical results of the algorithm but also the simulation results show that our algorithm outperforms the traditional known algorithms.

关键词： adaptive filters polynomial prediction model impulse response coeffcients process equation Kalman filter optimal

Computation of the Rational Representation for Solutions of High-dimensional Systems

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Communications in Mathematical Research 2010年第2期26卷 119-130页

作者： tan CHANG zhang SHU-GONG Institute of Mathematics Jilin University Changchun 130012

This paper deals with the representation of the solutions of a polynomial system, and concentrates on the high-dimensional case. Based on the rational univari- ate representation of zero-dimensional polynomial systems, we give a new description called rational representation for the solutions of a high-dimensional polynomial sys- tem and propose an algorithm for computing it. By this way all the solutions of any high-dimensional polynomial system can be represented by a set of so-called rational- representation sets.

关键词： rational univariate representation high-dimensional ideal maximally independent set rational representation irreducible component

A brief discussion on offshore wind turbine hydrodynamics problem

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Journal of Hydrodynamics 2022年第1期34卷 15-30页

作者： Zhi-teng Gao Xing-ya Feng Zi-tan zhang Zheng-liang Liu Xiao-xia Gao Li-jun zhang Shan Li Ye Li Multi-function Towing tank School of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai200240China Department of Ocean Science and Engineering Southern University of Science and TechnologyShenzhen518055China Hebei key Laboratory of Low Carbon and High Efficiency Power Generation Technology Department of Power EngineeringNorth China Electric Power UniversityBaoding071003China

Recently, offshore renewable energy has received significant attentions from most oceanic countries. Its multiple disciplinary nature appears as a hot research spot. Among those resources, offshore wind has been experiencing a rapid growth with strong industrial and governmental support. Among the research topics related to offshore wind turbine, those related to efficiency and safety issue receive most attentions, and they cover hydrodynamics, aerodynamics, structural dynamics, elasticity and so on. Hydrodynamics is considered as the key of these research for offshore wind turbine. This is not only because it is the fundamental of ocean engineering, but also it is similar to low speed aerodynamics which is the key of wind turbine rotor. In order to provide a comprehensive understanding of the important problems of offshore wind turbine hydrodynamics, we briefly review the evolution of offshore wind turbine and discuss the hydrodynamics problem associated with the research and development activities.

关键词： Offshore renewable energy offshore wind turbine hydrodynamics low speed aerodynamics aero-hydro dynamics coupling

Eco-friendly preparation of chitooligosaccharides with different degrees of deacetylation from shrimp shell waste and their effects on the germination of wheat seeds

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Marine Life Science & Technology 2019年第1期1卷 95-103页

作者： Xiaodan Fu Lin Zhu Li Li tan zhang Meng Li Haijin Mou College of Food Science and Engineering Ocean University of ChinaNo.5 Yushan RoadQingdao 266003China

Production of chitosan and its derivatives by traditional methods involves the excessive use of a reaction solution comprisedof sodium hydroxide and hydrochloric acid. Waste water resulting from this process has lim让ed the application of chitosanas a fertilizer as the process causes serious environmental pollution. Specifically, the resulting waste water contains highlevels of dissolved nitrogen and minerals from shrimp shells. In this study, an eco-friendly method was established to produce chitooligosaccharides (COS) with different degrees of deacetylation (DDAs) from shrimp shell waste. At a solid-tosolventratio of 1:6, the degree of demineralization was above 90% with the treatment of 30 g-L_1 H3PO4, and the degree ofdeproteinization was above 80% when treated with 30 g-L_1 KOH at 70 °C. Chitosans with different DDAs were obtainedby microwave-assisted KOH metathesis and the COS with Mw approximately 1500 Da were then prepared by oxidativedegradation. In summary, 33.73 kg H3PO4,12.77 kg, and 241.31 kg KOH were supplied during the processes of demineralization,deproteinization, and deacetylation of 100 kg shrimp shell waste, respectively. The process water was totally recycled,demonstrating that the shrimp shell could be wholly transformed into fertilize The entire process created a product withthe fractions of N:P2O5:K2O:COS = 7.94:24.44:10.72:1 &27. The test on the germination promotion of wheat seeds revealedthat the COS with 72」2% DDA significantly promoted germination. This work demonstrated the use of an eco-friendlypreparation method of COS with a specific degree of deacetylation that can be applied as a fertilizer.

关键词： Chitooligosaccharide Deacetylation degree Phosphoric acid Potassium hydroxide Germination promotion

Suitable internal control genes for qRT-PCR normalization in cotton fiber development and somatic embryogenesis

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Chinese Science Bulletin 2007年第22期52卷 3110-3117页

作者： TU LiLi zhang XianLong LIU DiQiu JIN ShuangXia CAO JingLin ZHU LongFu DENG FengLin tan JiaFu zhang CunBin National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural University Wuhan 430070 China

The mechanisms of cotton fiber development and somatic embryogenesis have been explored sys-tematically with microarray and suppression subtractive hybridization. Real-time RT-PCR provides the simultaneous measurement of gene expression in many different samples,with which the data from microarray or others can be confirmed in detail. To achieve accurate and reliable gene expression re-sults,normalization of real-time PCR data against one or several internal control genes is required,which should not fluctuate in different tissues during various stages of development. We assessed the gene expression of 7 frequently used housekeeping genes,including 18S rRNA,Histone3,UBQ7,Actin,Cyclophilin,Gbpolyubiquitin-1 and Gbpolyubiquitin-2,in a diverse set of 21 cotton samples. For fiber developmental series the expression of all housekeeping genes had the same down tendency after 17 DPA. But the expression of the AGP gene(arabinogalactan protein) that has high expression level at the later fiber development stage was up-regulated from 15 to 27 DPA. So the relative absolute quanti-fication should be an efficient and convenient method for the fiber developmental series. The expres-sion of nonfiber tissues series varied not so much against the fiber developmental series. And three best control genes Histone3,UBQ7 and Gbpolyubiquitin-1 have to be used in a combinated way to get better normalization.

关键词：棉花纤维胚胎测量模式

Comparison of visual quality in cataract patients with low astigmatism after ART2 or ReSTOR intraocular lens implantation

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International Journal of Ophthalmology(English edition) 2019年第3期12卷 424-428页

作者： Jing Hao Liang-zhang tan Lin Li Shao-Chong Bu Xin-Jun Ren Fang Tian Hong zhang Tianjin Medical University Eye Hospital North China University of Science and Technology tangshan Gongren Hospital

AIM: To compare visual quality in cataract patients with low corneal astigmatism who underwent intraocular lens(IOL) implantation, and evaluate effects of low levels of astigmatism on visual outcomes in multifocal pseudophakic ***: This retrospective review of clinical records comprised patients with preoperative regular corneal astigmatism of 0.75-1.0 diopters(D) with-the-rule or 0.5-0.75 D against-the-rule who had uneventful cataract surgery and AcrySof IQ ReSTOR Toric-2 IOL(ART2) or AcrySof IQ ReSTOR IOL(ReSTOR) implantation. Retrospective data collection included postoperative ART2 axis rotation, uncorrected astigmatism, uncorrected entire visual acuities, distance corrected entire visual acuities, average modulation transfer function(aMTF), Strehl ratio(SR), spectacle independence, and patient satisfaction between ***: Mean ART2 axis rotation was 3.12°±0.70°. No secondary surgery was required to realign IOL axis. Residual astigmatism values were-0.18±0.07 D and-0.91±0.25 D in groups ART2 and ReSTOR(Ptant, intermediate, and near visual acuities of group A were 0.01±0.05, 0.05±0.07, 0.02±0.07 logMAR, respectively; these were better than those of group R, which were 0.08±0.06, 0.15±0.12, and 0.09±0.08 logMAR, respectively(P<0.05). aMTF, SR, and spectacle independence rates were not significantly different. All patients were satisfied with postoperative ***: ART2 is more suitable than ReSTOR for cataract patients with regular corneal astigmatism 0.75-1.0 D with-the-rule or 0.5-0.75 D against-the-rule.

关键词： visual quality ART2 ReSTOR low corneal astigmatism multifocal pseudophakic eyes

Effects of Pretreatment by the Flavanol Ampelopsin on Porcine Kidney Epithelial Cell Injury Induced by Hydrogen Peroxide

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Agricultural Sciences in China 2010年第4期9卷 598-604页

作者： tan Gao-yi zhang Min-hong FENG Jing-hai HAN Ai-yun ZHENG Shan-shan XIE Peng State Key Laboratory of Animal Nutrition Institute of Animal Sciences Chinese Academy of Agricultural Sciences Beijing 100193 P.R.China

This study investigated the protective effects of ampelopsin on H2O2-induced oxidative injury in porcine kidney epithelial cell line, PK-15; cells were pretreated with medium containing 0, 15, 30, and 60 ug mL-1 ampelopsin, respectively, for 1 h prior to the addition of 100 umol L-1 H2O2. After 2 h, the cell viability, intracellular superoxide dismutase （SOD） and glutathione peroxidase （GSH-Px） activity, cellular malondialdehyde （MDA） content, and DNA strand breakage were determined. Results showed that ampelopsin pretreatment did not modify the SOD and GSH-Px inactivation but significantly decreased MDA production; except for the medium dose （30 ug mL-1）, all the tested concentrations of ampelopsin did not significantly inhibit cell viability reduction and gave no influence on DNA damage. The results suggested that all the tested doses of ampelopsin pretreatment before H2O2 addition can protect PK-15 cell from H2O2-induced lipid peroxidation, which might not be mediated by the SOD and GSH-Px responsees. The appropriate dose of ampelopsin pretreatment prevents PK-15 cell from DNA damage and cell viability reduction.

关键词： ampelopsin PK-15 cell antioxidation hydrogen peroxide

Changes in the peripapillary vasculature and macular thickness after cataract surgery using two phacoemulsification systems with optical coherence tomography angiography

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International Journal of Ophthalmology(English edition) 2022年第6期15卷 932-939页

作者： Liang-zhang tan Fang Tian Lu Chen Li-Na Sun Xue Gong Jing-Li Liang Hong zhang Xiao-Rong Li Tianjin Key Laboratory of Retinal Functions and Diseases Tianjin Branch of National Clinical Research Center for Ocular DiseaseEye Institute and School of OptometryTianjin Medical University Eye HospitalTianjin 300384China

AIM:To assess the changes in the peripapillary vasculature and macular thickness after cataract surgery using two phacoemulsification systems with optical coherence tomography angiography(OCTA).METHODS:Fifty-two eyes of 52 patients with agerelated cataract were randomized into two groups for phacoemulsification:Infiniti group(26 patients)using the Infiniti phacoemulsification system with gravity-fluidics and Centurion group(26 patients)using the Centurion phacoemulsification system with *** peripapillary vessel density(PVD)and macular thickness were examined using OCTA at baseline and at 1d,1 and 3mo after cataract ***:In the Infiniti group,the PVD was significantly reduced at 1d after the cataract surgery(P0.05).In the Centurion group,the VD and thickness in the optic papilla and macula did not significantly change in all regions during the follow-up(all P>0.05).The best-corrected visual acuity(BCVA)significantly improved in both groups postoperatively(P<0.001).CONCLUSION:Using the Infiniti phacoemulsification system,OCTA provides a promising analysis of retinal vascular alterations,demonstrating a reduction of the PVD and an increase in the macular *** Centurion phacoemulsification system can provide better retinal vasculature preservation during cataract surgery.

关键词： cataract surgery phacoemulsification system retinal vasculature optical coherence tomography angiography

TAZ inhibits osteoclastogenesis by attenuating TAK1/NF-κB signaling

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Bone Research 2021年第3期9卷 375-384页

作者： Wanlei Yang Xuanyuan Lu tan zhang Weiqi Han Jianlei Li Wei He Yewei Jia Kangxian Zhao An Qin Yu Qian Department of Orthopaedics Shaoxing People’s Hospital(Shaoxing HospitalZhejiang University School of Medicine)ShaoxingZhejiangPR China Department of Orthopedic Surgery Shanghai Key Laboratory of Orthopedic ImplantsShanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghaiChina

Osteoporosis is an osteolytic disorder commonly associated with excessive osteoclast *** coactivator with PDZ-binding motif(TAZ)is a key downstream effector of the Hippo signaling pathway;it was suggested to be involved in the regulation of bone ***,the exact role of TAZ in osteoclasts has not yet been *** this study,we demonstrated that global knockout and osteoclast-specific knockout of TAZ led to a low-bone mass phenotype due to elevated osteoclast formation,which was further evidenced by in vitro osteoclast formation ***,the overexpression of TAZ inhibited RANKL-induced osteoclast formation,whereas silencing of TAZ reduced ***,TAZ bound to TGF-activated kinase 1(TAK1)and reciprocally inhibited NF-κB signaling,suppressing osteoclast ***,our findings highlight an essential role of TAZ in the regulation of osteoclastogenesis in osteoporosis and its underlying mechanism.

关键词： osteoclast inhibited elevated