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Secondary protective control for mitigation of protection misoperations in electric power systems

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Journal of Modern Power Systems and Clean Energy 2016年第3期4卷 427-439页

作者： N.Eva WU qiu qin Department of Electrical and Computer Engineering Binghamton UniversityBinghamtonNY 13902USA

This paper investigates the feasibility of a selective secondary protective control strategy proposed to maximize the likelihood of recovery from misoperations of the existing(primary) protection in a power system. A scalable stochastic discrete-state model is established, taking into consideration of the processes of protection misoperations and their mitigations. Such misoperations have been a main culprit of cascading failures in modern power systems. The likelihood of recovery from protection misoperations is quantified by a set of security indices that formally incorporate the uncertain knowledge of the continuous-state of rotor angles/speed deviations of synchronous generators and that of the discretestate of equipment faults and primary protection misoperations. The proposed secondary protection leverages on the ever more available time-synchronized samples of networked sensors for diagnosis and fault-tolerant control to cost effectively improving power system reliability without altering the existing protection system. The technology readiness for implementing the secondary protective control is examined through a three-area test system.

关键词： Availability and security Fault-tolerance Fault-coverage and fault-diagnosis Hybrid modeling and

Calcination-Digestion-Desliming of Phosphorus Ore Bearing Rare Earth

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Journal of Rare Earths 2004年第z1期22卷 328-331页

作者： Zhang qin Zhang Jie Wang Jing qiu Yue qin Guizhou University of Technology Guiyang 550003 China Guizhou University of Technology Guiyang 550003 China Guizhou University of Technology Guiyang 550003 China Guizhou University of Technology Guiyang 550003 China

The recoveries of phosphorus and RE of ore from Zhijin in Guizhou were *** influences of the calcination temperature, resident time, the digested time and water volume of the calcinating on concentrate yield by desliming were also investigated by orthogonal *** calcination temperature is initial condition that makes carbonate mineral *** recovery of phosphorus is 83.02% and rare earth is 90.56% in phosphorus concentrate when calcined temperature is 900 ℃, other conditions include: calcined time is 30 min, digestion water volume is 300 ml, digestion time is 20 *** results show that the pre-treatment of the ore is favorable for the separation and enrichment of rare earth from phosphorus ore, and a process of calcination-digestion-desliming was promised.

关键词： phosphorus ore, calcination-digestion-desliming, separation, rare earths

Structures of Interaction of Non-selfsimilar Elementary Waves for 2D Scalar Conservation Law with Two Initial Discontinuities

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Acta Mathematicae Applicatae Sinica 2023年第3期39卷 465-490页

作者： Gui-qin qiu Gao-wei CAO Xiao-zhou YANG University of Chinese Academy of Sciences Beijing 100049China Wuhan Institute of Physics and Mathematics Innovation Academy for Precision Measurement Science and TechnologyCASWuhan 430071China

In this paper,we investigate the global solution and the structures of interaction between two dimensional non-selfsimilar shock wave and rarefaction wave of general two-dimensional scalar conservation law in which flux functions f(u)and g(u)do not need to be convex,and the initial value contains three constant states which are respectively separated by two general initial *** initial value contains three constant states,the cases of selfsimilar shock wave and rarefaction wave had been studied before,but no results of the cases of neither non-selfsimilar shock wave or non-selfsimilar rarefaction *** the assumption that Condition H which is generalization of one dimensional convex condition,and some weak conditions of initial discontinuity,according to all the kinds of combination of elementary waves respectively staring from two initial discontinuities,we get four cases of wave interactions as S+S,S+R,R+S and R+*** studying these interactions between non-selfsimilar elementary waves,we obtain and prove all structures of non-selfsimilar global solutions for all cases.

关键词： Riemann problem shock wave rarefaction wave wave interaction

特发性间质性肺炎病人血清STAT3和FOXM1水平与病情程度及预后的关系研究

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安徽医药 2025年第1期29卷 69-74页

作者：王泽凤邱勤谭建东杨黎四川省建筑医院呼吸肾病科四川成都610084 成都医学院第一附属医院呼吸与危重医学科四川成都610500

目的探讨特发性间质性肺炎(IIP)病人血清信号转导及转录激活因子3(STAT3)、叉头框转录因子M1(FOXM1)表达水平与其病情程度和预后的关系。方法选取2017年1月至2022年10月四川省建筑医院收治的298例IIP病人为IIP组,选取同时期该院收治的29... 详细信息

目的探讨特发性间质性肺炎(IIP)病人血清信号转导及转录激活因子3(STAT3)、叉头框转录因子M1(FOXM1)表达水平与其病情程度和预后的关系。方法选取2017年1月至2022年10月四川省建筑医院收治的298例IIP病人为IIP组,选取同时期该院收治的298例普通型间质性肺炎(UIP)病人为UIP组,另选取同时期在该院体检的280例健康人员为对照组。采用酶联免疫吸附测定(ELISA)检测血清STAT3与FOXM1表达水平,并采用全肺纤维化高分辨率CT(HRCT)评分评价IIP病情严重程度。分析三组受试者血清STAT3与FOXM1表达水平差异。对IIP组病人随访3个月,根据其生存情况分为预后良好组与预后不良组,分析预后不良与预后良好组IIP病人血清STAT3与FOXM1表达水平差异,并采用Spearman法分析IIP病人血清STAT3与FOXM1表达水平与全肺纤维化HRCT评分之间的关系。采用logistic回归分析IIP病人预后不良的影响因素,绘制受试者操作特征曲线(ROC曲线)评估血清STAT3与FOXM1表达水平对IIP病人预后不良的预测效能。结果IIP组、UIP组、对照组血清STAT3[(1.50±0.39)ng/L、(1.32±0.31)ng/L、(1.01±0.27)ng/L]、FOXM1[(34.56±5.64)ng/L、(22.69±4.11)ng/L、(15.51±3.94)ng/L]水平均依次降低(P<0.05)。IIP病人随访3个月共有41例病人死亡,预后不良发生率为13.76%(41/298);预后不良组IIP病人血清STAT3、FOXM1水平均高于预后良好组(P<0.05)。Spearman相关性分析表明,IIP病人血清STAT3、FOXM1水平均与全肺纤维化HRCT评分正相关(rs=0.65,rs=0.57;P<0.001)。另预后不良组年龄、Ⅱ型肺泡细胞表面抗原(KL-6)、白细胞计数、红细胞沉降率(ESR)、C反应蛋白(CRP)水平、全肺纤维化HRCT评分均高于预后良好组(P<0.05);第一秒用力呼气量(FEV1)、最大自主通气量(MVV)均低于预后良好组(P<0.05)。多因素logistic回归分析显示,年龄、KL-6、白细胞、ESR、CRP、STAT3、FOXM1水平、全肺纤维化HRCT评分均是导致IIP病人预后不良的危险因素(P<0.05),FEV1、MVV为保护因素(P<0.05)。ROC分析结果表明,血清STAT3、FOXM1水平联合预测IIP病人预后的灵敏度高于STAT3、FOXM1单独预测的灵敏度(χ^(2)=8.10、6.12,P=0.002、0.008);联合预测的曲线下面积(AUC)高于STAT3、FOXM1单独预测的AUC(Z=3.15、2.54,P=0.002、0.011)。结论IIP病人血清STAT3、FOXM1表达水平均上升,二者与IIP病情程度正相关,均对IIP病人预后具有良好的预测价值,且联合预测效能更高。

关键词：特发性间质性肺炎信号转导及转录激活因子3 叉头框转录因子M1 病情程度预后相关性

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First total synthesis of (±)-trolline

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Chinese Chemical Letters 2007年第6期18卷 651-652页

作者： qiu qin He[a] Chao Mei Liu[a]&Email:anrry_lcm@*** Ke Li[a] [a]School of Pharmacy Second Military Medical University Shanghai 200433 China

Trolline, a new bioactive alkaloid was isolated in 2004. We reported herein the first total synthesis of (±)-trolline, in two steps and 18.0% overall yield.

关键词： Total synthesis Trolline Alkaloid

A method for haplotype inference in general pedigrees without recombination

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Chinese Science Bulletin 2007年第4期52卷 471-476页

作者： WANG ChunKao WANG ZhiPeng qiu XiaoTian ZHANG qin Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture State Key Laboratories of AgroBiotechnology College of Animal Science and Technology China Agricultural University Beijing 100094 China

The abundance of single nucleotide polymorphisms (SNPs) makes the haplotype-based method instead of single-maker-oriented method the main approach to association studies on QTL mapping. The key problem in haploptype-based method is how to reconstruct haplotypes from genotype data. Directly assaying haplotypes in diploid individuals by experimental methods is too expensive, therefore the in silico haplotyping-determination methods are the major choice at the present. This paper presents a rapid and reliable algorithm for haplotype reconstruction for tightly linked SNPs in general pedigrees. It is based on six rules and consists of three steps. First, the parental origins of alleles in offspring are assigned conditional on genotypes in parent-offspring trios; second, the redundant haplotypes are eliminated based on the six rules; and finally, the most likely haplotype combinations are chosen via maximum likelihood method. Our method was verified and compared with PEDPHASE by simulated data with different pedigree sizes, numbers of loci, and proportions of missing genotypes. The result shows that our algorithm was superior to PEDPHASE in terms of computing time and accuracy of haplotype estimation. The computing time for 100 runs was 10―15 times less and the accuracy was 4%―10% higher than PEDPHASE. The result also indicates that our method was very robust and was hardly affected by pedigree size, number of loci, and proportion of missing genotypes.

关键词：单核多态性单倍型干扰谱系非重组计算方法 QTL

Redundancy Elimination in GPRS network

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第4期7卷 477-482页

作者： qiu qin-long ZHANG Dong-mei MA Jian ZHANG Da-jiang National Key Lab of Switching Technology and Telecommunication Network Beijing University of Posts ＆ Telecommunications Beijing 100876 China Nokia Research Centre Beijing 100013 China

The mechanisms of TCP’s retransmission and reset will result in redundant packets. These redundant packets are often sent unnecessarily to the user over a slow last-hop link delaying useful traffic. This is a problem for wide-area wireless links, such as General Packet Radio Service (GPRS), because unnecessary transmissions waste already limited radio bandwidth, battery power at the mobile terminal and incurs monetary cost due to charging by data volume. The paper first describes a GPRS model, then discusses how to eliminate the redundant packets in GPRS network and presents the simulation results in Network Simulation 2 (NS 2). The more traffic is, the more the network can benefit. In heavy traffic, it can even get more than 30% improvement in throughput. Average delay and loss percent are also lowered.

关键词： GPRS TCP Redundancy Elimination Network Simulation 2 (NS 2)

Two N-donor Auxiliary Ligands Mediated Zn(Ⅱ) Coordination Polymers Incorporating 5-Nitro-1,2,3-benzenetricarboxylate Ligand: Syntheses, Crystal Structures, and Luminescent Properties

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Chinese Journal of Structural Chemistry 2020年第6期39卷 1051-1056页

作者： ZHANG Tian ZHAO Yi-Jing qin qiu-Pei College of Chemistry and Chemical Engineering and Henan Key Laboratory of Functionoriented Porous MaterialsLuovang Normal UniversityLuoyang 471934China

Two N-donor auxiliary ligands mediated Zn(Ⅱ) coordination polymers, namely, {[Zn(Hnbta)-(bimm)](3H2O)}n(1) and {[Zn1.5(nbta)(pyim)(H2O)](2H2O)}n(2)(H3nbta = 5-nitro-1,2,3-benzenetricarboxylic acid, bimm = bis(imidazol-1-yl)methane and pyim = N-(4-pyridylmethyl)imidazole), have been prepared by the hydrothermal reaction. Their structures were determined by single-crystal X-ray diffraction analysis, elemental analyses and infrared spectra. Compound 1 possesses a one-dimensional(1D) chain structure, while compound 2 features a two-dimensional(2D) network. In addition, they both exhibit high thermal stabilities and photoluminescent properties in the solid, and can be explored as potential luminescent materials.

关键词： coordination polymer 5-nitro-l,2,3-benzenetricarboxylic acid bis(imidazoI-l-yl)methane N-(4-pyridylmethyl)imidazole photoluminescent properties

Design,synthesis of novel antifungal triazole derivatives with high activities against Aspergillus fumigatus

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Chinese Chemical Letters 2007年第4期18卷 421-423页

作者： qiu qin He Chao Mei Liu Ke Li Yong Bing Cao School of Pharmacy Second Military Medical University Shanghai 200433 China

Based on the active site of Aspergillus fumigatus lanosterol 14α-demethylase （AF-CYP51）, novel triazole compounds were designed. Their chemical synthesis and the antifungal activities were reported. The results showed that all the target compounds exhibited excellent activities with broad spectrum; in which compounds 4, 12 and 15 showed comparable activities against A. fumigatus to the control drug itraconazole.

关键词： CYP51 Antifungal Triazole Synthesis Aspergillus fumigatus