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Synthesis and Characterization of Model Complexes of Catechol Dioxygenases Supported by the Anionic Hydrotris-3,5-dimethyl-pyrazolylborate ligand

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Chemical Research in Chinese Universities 2009年第3期25卷 273-278页

作者： A li-ta DUAN li-mei XU Xiu-ting liU Shu-qin College of Chemistry Inner Mongolia University for Nationalities Tongliao 028000 P.R. China

An iron（Ⅲ） complex [Fe^Ⅲ（Tpz^Me2）（Hpz^Me2）Cl2]（1） has been synthesized at a low temperature, which contains tripodal ligand, namely, the anionic hydrotris-3,5-dimethyl-pyrazolylborate（Tpz^Me2）. A series of iron（Ⅲ） catecholate complexes 2-5 has been obtained via the reaction of compound 1 with catecholate or substituted catecholates. These complexes were characterized by X-ray crystallographic analysis, mass spectrometry and elemental analysis, and the results show that TpzMe2 ligand has the beneficial effect on the stabilization of iron（Ⅲ） catecholate complexes.

关键词： Iron complex Hydrotris-3,5-dimethyl-pyrazolylborate Catecholate

A robust vector tracking loop structure based on potential bias analysis

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Chinese Journal of Aeronautics 2024年第4期37卷 405-420页

作者： Qiongqiong JIA Yiran LUO Bing XU li-ta HSU Renbiao WU Tianjin Key Lab for Advanced Signal Processing Civil Aviation University of ChinaTianjin 300300China Interdisciplinary Division of Aeronautical and Aviation Engineering The Hong Kong Polytechnic University999077Hong KongChina Department of Geomatics Engineering University of CalgaryCalgary T2N1N4Canada

This paper proposes a robust vector tracking loop structure based on potential bias analysis. The influence of four kinds of biases on the existing two implementations of Vector Tracking Loops(VTLs) is illustrated by theoretical analysis and numerical simulations, and the following findings are obtained. Firstly, the initial user state bias leads to steady navigation solution bias in the relative VTL, while new measurements can eliminate it in the absolute VTL. Secondly, the initial code phase bias is transferred to the following navigation solutions in the relative VTL, while new measurements can eliminate it in the absolute VTL. Thirdly, the user state bias induced by erroneous navigation solution of VTLs can be eliminated by both of the two VTLs. Fourthly,the multipath/NLOS likely affects the two VTLs, and the induced tracking bias in the duration of the multipath/NLOS would decrease the performance of VTLs. Based on the above analysis,a robust VTL structure is proposed, where the absolute VTL is selected for its robustness to the two kinds of initialization biases;meanwhile, the instant bias detection and correction method is used to improve the performance of VTLs in the duration of the multipath/NLOS. Numerical simulations and experimental results verify the effectiveness of the proposed robust VTL structure.

关键词： Global Navigation Satellite System(GNSS) Vector Tracking Loop(VTL) Multipath Non-line-of-Sight(NLOS) Tracking bias propagation Least Absolute Shrinkage and Selection Operator(LASSO)

A Prefix Tree Based n-best list Re-scoring Strategy for Recurrent Neural Network Language Model

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Chinese Journal of Electronics 2014年第1期23卷 70-74页

作者： SI Yujing li ta PAN Jielin YAN Yonghong The Key Laboratory of Speech Acoustics and Content Understanding Chinese Academy of Sciences

In this paper, issues of speeding up Recurrent neural network language model(RNNLM) in the testing phase are explored so that RNNLMs can be used to re-rank a large n-best list in real-time systems which could obtain better performance. A new n-best list rescoring framework, Prefix tree based n-best list re-scoring(PTNR), is proposed to hundred percent eliminate the repeated computations which makes n-best list re-scoring ineffective. At the same time, the bunch mode technique,widely-used in speeding up the training of Feed-forward neural network language model(FF-NNLM), is combined with PTNR and the speed is further improved. Experimental results show that our approach is much faster than basic n-best list re-scoring. take 1000-best as an example, our approach is almost 11 times faster than the basic n-best list re-scoring.

关键词： Recurrent neural network language model(RNNLM) n-best list Prefix tree based n-best list re-scoring(PTNR) Speedup Bunch mode

Machine learning based LOS/NLOS classifier and robust estimator for GNSS shadow matching

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Satellite Navigation 2020年第1期1卷 167-178页

作者： Haosheng Xu Antonio Angrisano Salvatore Gaglione li-ta Hsu The Hong Kong Polytechnic University KowloonHong KongPeople’s Republic of China The University of Benevento G.Fortunato BeneventoItaly.3 The University of Naples ParthenopeNaplesItaly. The University of Naples Parthenope NaplesItaly

Global Navigation Satellites Systems(GNSS)is frequently used for positioning services in various applications,e.g.,pedestrian and vehicular ***,it is well-known that GNSS positioning performs unreliably in urban *** shadow matching is a method of improving accuracy in the cross-street *** position and classification of observed satellite visibility between line-of-sight(LOS)and non-line-of-sight(NLOS)are essential for its *** the conventional LOS/NLOS classification,the classifiers are based on a single feature,extracted from raw GNSS measurements,such as signal noise ratio,pseudorange,elevation angle,*** in urban canyons,these measurements are unstable and unreliable due to the signal reflection and refraction from the surrounding ***,the conventional least square approach for positioning is insufficient to provide accurate initialization for shadow matching in urban *** our study,shadow matching is improved using the initial position from robust estimator and the satellite visibility determined by support vector machine(SVM).The robust estimator has an improved positioning accuracy and the classification rate of SVM classification can reach 91.5%in urban *** important issue is related to satellites with ultra-high or low elevation angles and satellites near the building boundary that are very likely to be *** solving this problem,the SVM classification shows the potential of about 90%classification accuracy for various urban *** the help of these approaches,the shadow matching has a mean error of 10.27 m with 1.44 m in the cross-street direction;these performances are suitable for urban positioning.

关键词： GNSS Shadow matching NLOS and machine learning Robust estimation

Structure and electrical properties of La_(2)O_(3)-doped(K,Na,li)(Nb,ta)O_(3)-(Bi,Na)TiO_(3) ceramics

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Journal of Advanced Dielectrics 2023年第2期13卷 57-62页

作者： Bingsen Wang Junjun Wang Jiaqi li Miao Yang Minghao Huang Tianyi Ma Yu Tian Fengmin Wu School of Science Harbin University of Science and Technology Harbin 150080P.R.China School of Measurment and Communication Engineering Harbin University of Science and Technology Harbin 150080P.R.China

In this paper,Lead-free based on 0.97(K_(0.48)Na_(0.48)li_(0.04))(Nb_(0.8)ta0.2)O_(3)-0.03Bi_(0.5)Na_(0.5)TiO_(3) with additives La_(2)O_(3)(1,2,3,4 wt.%)was prepared by the solid reaction method,and the effect of La dopant on the structural and electrical properties is *** result indicates La dopant considerably decreases the optical band gap compared to the undoped *** the other hand,La doping leads to the higher dielectric property in a wider temperature,providing possibilities and directions for the subsequent development of ferroelectric photovoltaic materials with electrical properties and low optical band gap in a dramatical manner.

关键词： Piezoelectric ceramics KNNLT-BNT dielectric properties band gap

SEMI-GLOBAL C^1 SOLUTION TO THE MIXED INITIAL-BOUNDARY VALUE PROBLEM FOR QUASIliNEAR HYPERBOliC SYSTEMS

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Chinese Annals of Mathematics,Series B 2001年第3期22卷 325-336页

作者： li ta-TSIEN (li DAQIAN), JIN YI Department of Mathematics, Fudan University, Shanghai 200433, China. Department of Mathematics Fudan University Shanghai 200433 China (li Daqian).

By means of an equivalent invariant form of boundary conditions, the authors get the exis- tence and uniqueness of semi-global C1 solution to the mixed initial-boundary value problem for quasilinear hyperbolic systems... 详细信息

关键词： Semi-global C^1 solution Mixed initial-boundary value problem Quasilinear hyperbolic system

准格尔煤田老三沟外围勘查区煤系Al-Ga-li-Nb(ta)-Zr(Hf)共富集成因及资源潜力评价

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地质学报 2024年第8期98卷 2299-2315页

作者：李晶王道华张涵冯向东袁伟张晓阳王园郭帅蔡洪广李文华庄新国中国地质大学(武汉)资源学院湖北武汉430400 内蒙古煤炭地质勘查(集团)117有限责任公司内蒙古鄂尔多斯017000 内蒙古煤炭地质勘查(集团)有限责任公司内蒙古呼和浩特010010

内蒙古准格尔煤田石炭纪—二叠纪煤系蕴含丰富的铝、镓、锂及稀土等多种战略性金属。为明确该煤系Al-Ga-li-Nb(ta)-Zr(Hf)等战略性金属富集的成因机制,本文以准格尔煤田老三沟外围勘查区典型钻孔石炭纪—二叠纪煤系为研究对象,采用X射... 详细信息

内蒙古准格尔煤田石炭纪—二叠纪煤系蕴含丰富的铝、镓、锂及稀土等多种战略性金属。为明确该煤系Al-Ga-li-Nb(ta)-Zr(Hf)等战略性金属富集的成因机制,本文以准格尔煤田老三沟外围勘查区典型钻孔石炭纪—二叠纪煤系为研究对象,采用X射线衍射分析(XRD)、X射线荧光光谱仪(XRF)、电感耦合等离子体质谱仪(ICP-MS)、带能谱的扫描电镜和基于Tescan Mira扫描电镜的TIMA-X综合矿物分析仪等系统分析了煤的矿物学和元素地球化学特征。研究区太原组和山西组煤系中普遍存在Al-li-Ga以及Nb-ta-Zr-Hf的共富集,其中太原组煤系主可采6号煤中li、Ga、Zr以及局部层位Nb、ta均达工业利用品位,具有重要的成矿潜力和开发利用价值。煤中富集的li和Ga主要赋存于高岭石、勃姆石中,部分li还赋存于绿泥石中。煤中Al-Ga-li-Nb(ta)-Zr(Hf)的富集受控于陆源区母岩的化学风化、火山碎屑的输入、流体活动以及成岩过程中复杂的水/岩作用过程。华北地台前石炭系沉积基底和阴山古陆中元古代钾长花岗岩长期的强烈风化淋滤,形成富Ga-li的铝土质古风化壳残积物,为研究区煤中铝、镓、锂的初步富集提供了物质来源。富集的铝、镓、锂随地下水等流体迁移,在水动力相对较弱的潟湖、泥炭沼泽等水体沉淀富集。在泥炭化和成岩阶段,富集li、Ga、Nb、ta等战略性金属的中性—长英质碱性火山灰的输入以及地下水、低温热液、酸性流体的迁移导致了煤系li、Ga等战略性金属的二次富集。

关键词：煤系铝-镓-锂富集成因铝土质风化壳火山灰流体迁移准格尔煤田

A NOTE ON THE GENERAliZED RIEMANN PROBLEM~*

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Acta Mathematica Scientia 1991年第3期11卷 283-289页

作者：李大潜 FUDAN UNIV DEPT MATHSHANGHAIPEOPLES R CHINA

1. Introduction The Riemann problem for the quasilinear hyperbolic system of conservation laws

关键词： A NOTE ON THE GENERAliZED RIEMANN PROBLEM

Adipocytokine Gene SNPs and Type 2 Diabetes in Mongolians:A Gene-Gene and Gene-Environment Interaction Study

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Biomedical and Environmental Sciences 2023年第12期36卷 1183-1188页

作者： li Na ZHANG li Hong GAO Yu Min li Hai ling li Wu Yun ta Na PANG Hui ZHAO Yan Ping ZHENG Hai Fang DONG Jia Hui ZHAO ling Yan School of Public Health Inner Mongolia Medical UniversityHohhot 010000Inner MongoliaChina Department of Critical Care Medicine Ordos Central HospitalOrdos 017000Inner MongoliaChina Laboratory for Molecular Epidemiology in Chronic Diseases Inner Mongolia Medical UniversityHohhot 010000Inner MongoliaChina Affiliated Hospital of Inner Mongolia Medical University Hohhot 010oooInner MongoliaChina

The International Diabetes Federation's most recent data indicates that the prevalence of diabetes worldwide is projected to rise to 12.2%by 2025,with783 million people affected^([1]).The prevalence of diabetes in China has risen from 9.3%in 2011 to13.04%in 2021^([1]).A cross-sectional study in China showed that the prevalence of diabetes among Tibetans was 6.5%and it was 6.3%among the Hui people in 2018,while the incidence of diabetes in the Inner Mongolia Autonomous Region was as high as 19.9%,ranking first in the country^([2]).The Mongolian population has a diet structured around meat and milk,supplemented by pasta,rice and vegetables,and foods such as homemade yogurt and bacon are often *** a unique diet may have contributed to a high incidence of diabetes among the Mongolian people.

关键词： Diabetes prevalence cytokine