Priority-sequence of mineral resources' development and utilization based on grey relational analysis method

Generally, the sequence decision of the development and utilization of Chinese mineral resources is based on national and provincial overall plan of the mineral resources. Such plan usually cannot reflect the relative size of the suitability of the development and utilization of mineral resources. To solve the problem, the paper has selected the gift condition, the market condition, the technological condition,socio-economic condition and environmental condition as the starting-points to analyze the influential factors of the priority-sequence of mineral resources' development and utilization. The above 5 conditions are further specified into 9 evaluative indicators to establish an evaluation indicator system. At last,we propose a decision model of the priority sequence based on grey relational analysis method, and figure out the observation objects by the suitability index of development. Finally, the mineral resources of a certain province in China were analyzed as an example. The calculation results indicate that silver(2.0057), coal(1.9955), zinc(1.9442), cement limestone(1.9077), solvent limestone(1.5624) and other minerals in the province are suitable for development and utilization.

Analysis method and algorithm design of biological sequence problem based on generalized k-mer vector

K-mer can be used for the description of biological sequences and k-mer distribution is a tool for solving sequences analysis problems in bioinformatics.We can use k-mer vector as a representation method of the k-mer distribution of the biological sequence.Problems,such as similarity calculations or sequence assembly,can be described in the k-mer vector space.It helps us to identify new features of an old sequence-based problem in bioinformatics and develop new algorithms using the concepts and methods from linear space theory.In this study,we defined the k-mer vector space for the generalized biological sequences.The meaning of corresponding vector operations is explained in the biological context.We presented the vector/matrix form of several widely seen sequence-based problems,including read quantification,sequence assembly,and pattern detection problem.Its advantages and disadvantages are discussed.Also,we implement a tool for the sequence assembly problem based on the concepts of k-mer vector methods.It shows the practicability and convenience of this algorithm design strategy.

A TENSOR ANALYSIS METHOD FOR ESTIMATING 3-D MOTION PARAMETERS

By using the center projection image sequence to estimate 3-D motion parameters,one needs to know the corresponding relationship between the feature of motion object in spaceand the projection coordinate on image plane.In order to avoid using the relationship of featurecorrespondence,the tensor analysis method in the affine transformation system is presented,andthe simulation data of experimental results are given.

STUDY ON THE SEQUENCE STRUCTURE OF SBR BY ^(13)C-NMR METHOD Ⅱ. PEAK ASSIGNMENT FOR ALIPHATIC CARBONS SPECTRA

The study on ^(13)C-NMR spectra of aliphatic carbon region of emuision-processed and solution-processed (by lithium catalyst) SBR was carried out. The assignments for more than thirty odd peaks observed experimentally were made by using 'corresponding analysis' method, combined with the empirical parameters reported in literature. The peak intensifies were calculated based on BemouUian statistic assumption.

rDNA-ITS 序列测定等三种方法鉴定假丝酵母菌结果比较

目的通过三种假丝酵母菌鉴定方法的比较,为临床选择假丝酵母菌的鉴定方法提供参考。方法用科玛嘉显色培养基、API 20C AUX生化系统和rRNA-ITS序列测定分析鉴定住院患者口腔培养出的198株假丝酵母菌,比较3种鉴定方法的结果。结果 API 20C AUX生化系统与rDNA-ITS序列测定分析鉴定结果一致,科玛嘉显色培养基与API 20C AUX生化系统和rDNA-ITS序列测定分析鉴定的符合率白假丝酵母菌为97.84%,热带假丝酵母菌的符合率为93.33%,光滑假丝酵母菌和克柔假丝酵母菌的符合率分别为90.91%、88.89%,其他假丝酵母菌科玛嘉不能鉴定。结论 API 20C AUX生化系统与rDNA-ITS序列测定分析鉴定假丝酵母菌的结果有较好的一致性,rDNA-ITS序列测定分析鉴定假丝酵母菌有望成为假丝酵母菌鉴定较好的方法。科玛嘉显色培养基方法可以简便有效的鉴定最常见的4种假丝酵母菌。

Long-term V(RI) CCD photometry of pre-main-sequence stars in the association Cepheus OB3

Results from optical CCD photometric observations of 13 pre-main-sequence stars collected during the period from February 2007 to November 2020 are presented.These stars are located in the association Cepheus OB3,in the field of the young star V733 Cephei.Photometric observations,especially concerning the long-term variability of the stars,are missing in the literature.We present the first longterm V(RI)c monitoring for them,that cover 13 years.Results from our study indicate that all of the investigated stars manifest strong photometric variability.The presented paper is a part of our program for the photometric study of pre-main-sequence stars located in active star-forming regions.

基于Hsp70基因的绵羊肺炎支原体TaqMan检测方法的建立及其遗传演化分析

热休克蛋白70 (heat shock protein 70,Hsp70)是绵羊肺炎支原体(Mycoplasma ovipneumoniae, Movi)的重要膜蛋白,是机体内高度保守的生物分子,但在种间差异大,可作为分子生物学检测的候选靶区。为建立基于Hsp70基因的Movi通用型TaqMan实时荧光定量PCR(qPCR)检测方法,并进一步了解其遗传变异情况,本研究基于GenBank中Movi的Hsp70基因特征,设计特异性的引物及探针,建立了基于Hsp70基因的绵羊肺炎支原体qPCR检测方法。应用建立的检测方法对88份山羊鼻拭子样品及43份疑似羊支原体性肺炎(Mycoplasmal pneumonia of sheep and goats, MPSG)病料进行检测。将检测结果为Movi阳性的肺组织样品进行分离鉴定,并对分离株Hsp70基因进行序列分析。结果显示,建立的qPCR检测方法其相关系数为1.00,扩增效率为96.0%,斜率为-3.411,Y轴截距为37.29。特异性强,与丝状支原体山羊亚种(Mycoplasma mycoides subsp.capri, Mmc)、山羊支原体山羊肺炎亚种(Mycoplasma capricolum subsp.capripneumoniae, Mccp)、莱氏无胆甾原体(Acholeplasmalaidlawii, AL)、无乳支原体(Mycoplasma agalactiae, Maga)、伪结核棒状杆菌(Corynebacterium pseudotuberculosis, CP)、羊口疮病毒(orf virus, ORFV)、牛支原体(Mycoplasma bovis, Mb)等牛羊常见病原均无交叉反应;敏感性高,最低检测限为5.72 copies·μL^(-1);重复性优,组内变异系数和组间变异系数均小于1.00%。6株Movi分离株Hsp70基因全长均为1 818 bp,与其它Movi参考株核苷酸和氨基酸同源性分别为96.0%~99.4%和98.0%~100.0%;进一步分析发现,山羊源Movi均比绵羊源多1个N-糖基化位点。遗传演化分析表明,其均处于ClusterⅠA亚分支(均为山羊源)。综上,本研究建立了特异性强、敏感性高、重复性优的基于Hsp70基因的Movi的qPCR检测方法。序列分析发现,不同来源Movi的Hsp70基因核苷酸同源性高;遗传演化分析证实,Movi福建株与山羊源分离株遗传关系较近。本研究不仅为Movi临床诊断提供了技术支持,更为进一步了解Movi遗传演化规律提供参考。

从线性校验子分析方法浅析曾肯成先生的密码分析思想

曾肯成先生于1986年洞察到了密码体制中的熵漏现象,后来在此基础上提出著名的线性校验子分析方法.本文全面剖析了线性校验子分析方法的发展历程,由此深刻揭示了曾先生的密码分析思想的精髓.首先,介绍曾先生通过观察Geffe序列生成器的熵漏现象,提出线性校验子分析方法的朴素思想的过程及其蕴含的思想方法;其次,介绍曾先生通过在Geffe序列生成器基础上凝练出的一般问题,提出解决这一问题的一般方法—线性校验子分析方法的过程及其蕴含的思想方法;再次,介绍曾先生通过分析线性校验子分析方法存在的缺陷,进一步完善和改进线性校验子分析方法的过程及其蕴含的思想方法;最后,通过分析从相关分析方法到线性校验子分析方法的进阶之路,阐述了线性校验子分析方法这把利剑的威力.

A New Inter-Sequence Analysis Method Using Objective Scaling Measure

The inter-sequence analysis method is a popular decision making method considering subjective information of the decision maker.The validity of this method is sensitive to the subjective information provided by the decision maker significantly.Thus,a new weighting method based on the inter-sequence analysis method is proposed.This new method can appropriately reduce the participation of the subjective judgment of the decision maker,and then accordingly decrease the influence of the subjective judgment to the results.It only needs the decision maker to give the inter sequence of the criteria.The importance comparison of two criteria is objectively determined by considering the ratio of a criterion being superior to another one.Some numerical examples are given to illustrate the calculation process of the new method.

钢管幕埋深及顶进顺序对地表变形的影响

依托合肥市滨湖科学城庐州大道浅埋隧道段工程,利用有限差分软件FLAC 3D对不同埋深及顶进顺序下钢管幕顶进施工过程进行模拟。结合模型计算结果和监测数据分析,总结钢管幕埋深与顶进顺序对地表变形的影响。结果表明,先上后下的顶进方案优于先下后上的方案,上部钢管的存在会减小下部钢管顶进对地表变形的影响;钢管的埋深越大,对于地表变形的影响也越大,下部钢管的顶进会扩大沉降范围和沉降值,上部钢管的顶进会使地表产生小幅隆起;从上至下依次顶进的方案为确定的最优方案,随着钢管顶进数量的不断增加,地表沉降量不断扩大,地表变形曲线从V形向W形转变,表明浅部钢管对地表变形有一定的控制作用。

基于模糊综合评价的水下采油树结构可靠性分析

针对水下采油树结构可靠性分析,提出一种基于模糊综合评价理论的水下采油树结构可靠性分析方法。首先,通过分析不同厂家水下采油树构型,确定水下采油树的典型结构构型及组成,分析水下采油树在运行过程中所受的外载荷;其次,采用专家打分以及模糊综合评价法求得故障树底事件失效率,通过定量分析求解顶事件失效率、可靠度及可靠寿命曲线等可靠性指标;最后,对故障树进行重要度分析及失效率变化对系统结构可靠性的影响,结果表明:“树本体内磨损”的关键重要度最高,对系统结构可靠性的影响最大,是结构中的薄弱环节,应予以关注。研究成果可为水下采油树结构的风险评估提供技术参考,对水下采油树的设计制造提供一定的指导意义。

非对称钢-混混合梁桥关键技术研究

为给多跨非对称钢-混混合梁桥设计与施工提供参考,以一座4跨非对称钢-混混合梁桥——龙翔大桥主航道桥为背景,采用有限元软件建立该桥杆系结构有限元模型,分析不同合龙顺序、钢箱梁长度对该桥成桥后线形和内力的影响,以及9个关键参数对预拱度及合龙口纵向变形的影响。结果表明:合龙顺序对成桥线形和内力的影响较小,该桥采用2个中跨依次合龙的施工顺序;各墩墩顶负弯矩绝对值和中跨跨中挠度随钢箱梁长度与中跨跨径之比k 1增大而呈线性减小,该桥k 1最终取0.371,中跨钢箱梁长75 m;钢箱梁自重和主梁混凝土弹性模量对预拱度影响较大,前者变化6%、后者变化10%时预拱度变化值分别约为15 mm和13 mm;环境温度对合龙口纵向变形影响较大,环境温度变化10℃时合龙口纵向变形变化12 mm。施工控制时应严格控制钢箱梁自重、主梁混凝土弹性模量,确保按设计温度合龙。

移动办公数据多层混沌序列加密方法仿真

为了提高移动办公数据的安全性,降低办公数据在传输和存储过程中被修改和窃取的风险,提出基于混沌序列的移动办公数据多层加密方法。结合独立分量分析方法和经验模态分解方法,对移动办公数据预处理,消除移动办公数据中存在的噪声;通过建立混沌序列并引入主成分分析方法,对混沌序列降维处理,在三维Arnold变换的基础上对移动办公数据展开置乱变化,完成移动办公数据的第一层加密。根据生成混沌Frank序列,对移动办公数据展开第二层加密处理,完成移动办公数据的多层加密。实验结果表明,所提方法的密文置乱性高,且生成密文所需时间低于130ms,加密效率高,提高了数据的安全性。

Evolved clustering analysis of 300 MW boiler furnace pressure sequence based on entropy characterization

The furnace process is very important in boiler operation,and furnace pressure works as an important parameter in furnace process.Therefore,there is a need to analyze and monitor the pressure signal in furnace.However,little work has been conducted on the relationship with the pressure sequence and boiler’s load under different working conditions.Since pressure sequence contains complex information,it demands feature extraction methods from multi-aspect consideration.In this paper,fuzzy c-means analysis method based on weighted validity index(VFCM)has been proposed for the working condition classification based on feature extraction.To deal with the fluctuating and time-varying pressure sequence,feature extraction is taken as nonlinear analysis based on entropy theory.Three kinds of entropy values,extracted from pressure sequence in time-frequency domain,are studied as the clustering objects for work condition classification.Weighted validity index,taking the close and separation degree into consideration,is calculated on the base of Silhouette index and Krzanowski-Lai index to obtain the optimal clustering number.Each time FCM runs,the weighted validity index evaluates the clustering result and the optimal clustering number will be obtained when it reaches the maximum value.Four datasets from UCI Machine Learning Repository are presented to certify the effectiveness in VFCM.Pressure sequences got from a 300 MW boiler are then taken for case study.The result of the pressure sequence case study with an error rate of 0.5332%shows the valuable information on boiler’s load and pressure sequence in furnace.The relationship between boiler’s load and entropy values extracted from pressure sequence is proposed.Moreover,the method can be considered to be a reference method for data mining in other fluctuating and time-varying sequences.

基于工频变化量的含逆变型分布式电源不平衡配电网故障分析方法

由于逆变型分布式电源(inverter interfaced distributed generation,IIDG)输出具有非线性特征,配电网常规的故障分析方法难以揭示故障后工频变化量的特性,而网络参数的不平衡更增加了分析难度。为此,首先建立IIDG的故障工频变化量等值模型,并分析其特性规律;然后,针对不平衡网络,通过并联补偿电流源的方式建立不平衡元件的序分量等值模型,进而提出一种计及脱网时序、基于序网络迭代修正的含IIDG不平衡配电网故障工频变化量计算方法;最后,基于PSCAD/EMTDC对所提算法进行仿真验证。仿真结果表明所提算法可准确、快速地求解含IIDG不平衡配电网故障后的工频变化量(幅值最大相对误差小于1%),可用于基于工频变化量故障特征的继电保护原理研究与性能分析。

AllType NGS11位点测序试剂在HLA-DPB1基因分型中的模棱两可结果分析

目的 统计分析AllType NGS 11位点测序试剂在Ion Torrent S5和Illumina Miseq 2种二代测序平台对HLA-DPB1基因进行分型检测时的模棱两可结果情况。方法 采用One Lambda公司AllType NGS 11位点测序试剂盒检测434个患者或供者标本的HLA-DPB1基因,其中在Ion Torrent S5测序平台上检测了336个标本,在Illumina Miseq测序平台上检测了98个标本;并同步对434份标本采用PCR-SSO流式磁珠法复核HLA-DPB1基因。对HLA-DPB1*13∶01∶01/107∶01模棱两可等位基因,采用Sanger测序法检测区分。使用TypeStream Visual专业软件指定NGS法的HLA-DPB1基因分型结果,直接计数法统计分析模棱两可组合比例。结果 NGS法以HLA-DPB1命名*后第3区域数字作为高分辨结果进行统计,434个标本中共有357个标本出现模棱两可结果,占82.3%(357/434);其中Ion Torrent S5测序平台336个标本有275个标本存在模棱两可结果,占81.8%(275/336),表现出45种类型;Illumina Miseq测序平台98个标本有82个标本存在模棱两可结果,占83.7%(82/98),表现出27种类型。所有标本HLA-DPB1基因经PCR-SSO法复核,未发现NGS法漏检HLA-DPB1等位基因情况。Sanger测序法检测区分41个标本,共43个HLA-DPB1*13∶01∶01/107∶01模棱两可的等位基因,发现HLA-DPB1*13∶01∶01等位基因为25个,占58.1%(25/43);HLA-DPB1*107∶01等位基因为18个,占41.9%(18/43)。结论 应用AllType NGS 11位点测序试剂仍有较高比例的HLA-DPB1基因模棱两可组合结果。利用Sanger测序法分析HLA-DPB1基因1号外显子可区分解决部分HLA-DPB1*13∶01∶01/107∶01模棱两可等位基因。

基于G1序关系分析法的光伏瓦片发电系统综合效益评价

首先,对影响发电效率的相关因素进行了分析,并根据评价指标选取原则从4个方面选取了共15个效益评价指标;然后,利用G1序关系分析法确定了评价指标的权重,构建了系统的综合效益评价体系,并确定了各个指标的评分标准;最后,以某居民建筑为实例,用所构建的模型进行了技术经济评价和综合效益评价验证计算。算例验证结果表明,利用所提出的模型可以确定算例建筑搭建光伏瓦片系统的可行性;模型具有实用性。

新白云站大体积混凝土楼板跳仓法施工有限元分析

为评估跳仓法施工对大体积混凝土早期应力的影响,基于有限元方法分析不同因素下单块大体积混凝土楼板的早期应力,采用灰色关联度方法确定不同因素的影响程度,并对新白云站大体积混凝土楼板的跳仓法施工进行仿真分析。结果表明:入模温度、混凝土绝热温升值、楼板平面尺寸、楼板厚度、环境对流系数、垫层弹性模量对大体积混凝土楼板早期应力的影响程度依次降低;大体积混凝土楼板内部的钢筋可降低其早期应力,但对其影响可忽略不计;减小大体积混凝土楼板的仓块尺寸可有效降低其早期应力;仓块的浇筑顺序会影响大体积混凝土楼板早期应力的发展,有规律的浇筑顺序可使混凝土受力趋于均匀,以减少应力集中现象。

主余震序列作用下层间隔震结构倒塌地震风险分析

为了定量评估余震对隔震结构造成的损伤,基于地震波的随机性和结构的复杂性,提出一种适用于隔震结构的主余震序列构造方法。利用构造方法挑选的地震波作为激励,采用损伤指数作为结构地震需求参数,谱加速度作为地震动强度参数,对层间隔震结构进行主余震序列作用地震风险分析。研究结果表明,随着余震的作用和地震发生超越概率的降低,结构损伤指数会明显增加,与50年超越概率为2%的单独主震作用相比,在50年超越概率为2%的余震发生后,层间隔震结构从处于轻微破坏状态进入中等破坏状态,余震的作用使目标结构的损伤增大23.26%,隔震层的损伤增大33.33%,结构发生倒塌的风险概率增加75%,说明余震的作用会导致结构损伤加剧,发生倒塌的可能性增加。

基于序列近似优化方法的加筋圆锥壳结构优化设计

为提高运载火箭圆锥壳舱段承载效率,开展轴压载荷下加筋圆锥壳结构轻量化设计。首先,建立加筋圆锥壳结构有限元模型,采用非线性显式动力学算法开展分析;然后,对比分析加筋圆锥壳结构参数灵敏度指标及中间框径向和垂直安装方式对结构极限承载性能的影响;最后,基于径向基函数代理模型和Kriging代理模型序列近似优化方法开展加筋圆锥壳结构优化设计。结果表明:腹板高度、桁条数量、翼缘厚度及耦合效应是加筋圆锥壳极限承载能力的关键影响因素,而中间框径向和垂直安装方式对结构极限承载性能的影响不显著;采用序列近似优化方法经迭代优化后,相对初始设计减重9.40%,验证了方法的有效性。