查询词典 variance
- 与 variance 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Variance of the sequences comes from accumulated mutation.These properties make them unique and important not only to anthroponomy and genetics but also to forensic science and medicine.
由于 Y染色体的这些特点,使得对 Y染色体上多态性遗传标记的研究不仅在人类进化学、遗传学等方面意义重大,而且在法医学、临床医学等方面亦具有重要而独特的应用价值
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To use the flood resources adequately and fully,the method which considers the time series variance law of flood statistical characteristics within the year to calculate staged limited water level in flood season and design flood is proposed.Case study demonstrates that the method is feasible and appliable.
为更好地提高洪水资源利用率,基于暴雨洪水的物理成因和统计规律分析,提出采用年内洪水统计特性变化规律来确定设计洪水和各分期汛限水位的新方法,结合实例说明该方法在汛限水位动态控制中的实用性和可行性。
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The following results are made from this research: Assessing data quality and band combination of different bands in line with geo-target features in desertification areas, and determining basic bands for desertification monitoring. And understanding and studying the spectral features and variation rules of geo-targets in the experimental area, raising that it is the basis of geo-targets information collection with imaging spectrometer data to understand spectral features and variation rules of geo-targets, realizing that in a great extent spectral-integrated-form-based classification method can remove the phenomenon of "different spectrum with same objects" resulted from reflection ratio curve translation because of the angle change among sensor, targets and observation direction, and the average and variance images can be introduced to solve the problem of two kinds of geo-target with similar spectral forms and much different values of whole reflectionratio. It is suggested that "red edge" range bands of vegetation, which has close relationship with vegetation cover and biomass, is the main characteristic bands and important basis for careful vegetation classification and quantitative retrieval, and pixel-based derivative spectral analysis is very useful for removing the effects of soil background values and quantitatively retrieving vegetation biomass and cover. The remote sense quantitative retrieval model is developed for main appraisable factors of desertification monitoring assessment with imaging spectrometer data and then the applicability of model is analyzed.
研究结果如下:首先针对荒漠化地区的地物特征,对高光谱数据不同波段的数据质量、波段组合进行了评价,提出了适用于荒漠化监测的基本波段选择集;初步了解和掌握了研究地区的地物光谱特性及变异规律,进一步明确了掌握地物光谱特征和变异规律是用成像光谱仪数据提取地物信息的基础;发现了基于光谱整体形状的分类方法在很大程度上能够消除由于传感器、地物目标观测方向之间的角度变化引起的反射率曲线整体平移的&同物异谱&现象,对于谱形相似而整体反射率的值相差较大的两类地物,通过引入均值和方差图像参与分类得到解决;研究还表明在植被&红边&范围内的波段是进行荒漠化监测的主要特征波段,这些波段与植被生物量和盖度都有密切的关系,是开展精细植被分类研究和植被定量反演的重要基础;像元的导数光谱分析可以消除土壤背景的影响,是进行植被生物量和盖度定量反演的有力工具;建立了荒漠化监测主要评价因子的定量反演模型,并分析了模型的适用性。
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Grotius found only four in the whole book; Hengstenberg admits ten; the opinions on this point are so much at variance that one cannot help noticing how varying men's conception of an Aramaism is.
;格劳秀斯,发现只有4个在整本书;韩斯坦堡也承认,十;意见,在这一点上是这么多的差异之一,不能帮助注意到如何变男性的观一aramaism是。
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Using 3-year-old culms of 8 provenances of Bambusa chungii from Guangdong, Guangxi and Hainan Provinces, the indexes of wood properties, such as fiber dimensions and chemical composition were investigated and analyzed by the methods of Analysis of variance and correlation coefficient to reveal the geographic genetic variation situation.
以广东、广西和海南3个省8个产地的粉单竹群体3年生竹秆为研究材料,对其纤维形态、化学成分等纸浆材性指标进行测定,采用方差分析和相关分析方法对上述竹材性状进行遗传变异分析,以揭示粉单竹材性的地理遗传变异规律。
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The company specialized productionenrichment plant, provides the technical process,the dressing experiment,the installment instructswww.lzkysb.cn gently yu0797-5745599 to stir the equipment, the stirring chest, the highly effective stirring chest, the leaching vat, the promotion stirring chest, the mineral product stirring chest, the mineral product promotion stirring chest, the mixer, the mineral product mixer, the highly effective mixer, promotes the mixer, stirs the tube, stirs the barrel, the mineral product agitation barrel, the promotion agitation barrel, the stirring chest which the company produces, the promotion type agitation barrel, the highly effective stirring chest, the bilobed wheel stirring chest, the leaching vat mainly uses in the density not being bigger than 30%the proportion is not bigger than 3.5 pulpthe flotation reagents for ore-dressing carries on the agitation, this product divides XBthe XBT promotion type agitation barrel, the XBT promotion type agitation barrel in carries on to the pulpAgitation at the same time may promote the pulp liquid level to certain altitude, for this reason the promotion type agitation barrel to does not have the dropping variance dressing location to be extremely advantageous mainly by the trough body, the support, the electrical machinery, the impellerthe drive shaftso on is composed.
公司专业生产选矿设备,提供工艺流程,选矿实验,安装指导www.lzkysb.cn温良禹0797-5745599搅拌设备,搅拌槽,高效搅拌槽,浸出槽,提升搅拌槽,矿用搅拌槽,矿用提升搅拌槽,搅拌机,矿用搅拌机,高效搅拌机,提升搅拌机,搅拌筒,搅拌桶,矿用搅拌桶,提升搅拌桶,公司生产的搅拌槽,提升式搅拌桶,高效搅拌槽,双叶轮搅拌槽,浸出槽主要用于浓度不大于30%和比重不大于3.5的矿浆与浮选药剂进行搅拌,该产品分XB和XBT提升式搅拌桶, XBT提升式搅拌桶在对矿浆进行搅拌的同时可将矿浆液面提升到一定的高度,为此提升式搅拌桶对没有落差的选矿场地极为有利主要由槽体,支架,电机,叶轮及传动轴等组成。
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The company specialized productionenrichment plant, provides the technical process,the dressing experiment,the installment instructswww.lzkysb.cn gently yu0797-5745599 to stir the equipment, the stirring chest, the highly effective stirring chest, the leaching vat, the promotion stirring chest, the mineral product stirring chest, the mineral product promotion stirring chest, the mixer, the mineral product mixer, the highly effective mixer, promotes the mixer, stirs the tube, stirs the barrel, the mineral product agitation barrel, the promotion agitation barrel, the stirring chest which the company produces, the promotion type agitation barrel, the highly effective stirring chest, the bilobed wheel stirring chest, the leaching vat mainly uses in the density not being bigger than 30% and the proportion is not bigger than 3.5 pulp and the flotation reagents for ore-dressing carries on the agitation, this product divides XB and the XBT promotion type agitation barrel, the XBT promotion type agitation barrel in carries on to the pulpAgitation at the same time may promote the pulp liquid level to certain altitude, for this reason the promotion type agitation barrel to does not have the dropping variance dressing location to be extremely advantageous mainly by the trough body, the support, the electrical machinery, the impeller and the drive shaft and so on is composed.
公司专业生产选矿设备,提供工艺流程,选矿实验,安装指导 www.lzkysb.cn 温良禹0797-5745599搅拌设备,搅拌槽,高效搅拌槽,浸出槽,提升搅拌槽,矿用搅拌槽,矿用提升搅拌槽,搅拌机,矿用搅拌机,高效搅拌机,提升搅拌机,搅拌筒,搅拌桶,矿用搅拌桶,提升搅拌桶,公司生产的搅拌槽,提升式搅拌桶,高效搅拌槽,双叶轮搅拌槽,浸出槽主要用于浓度不大于30%和比重不大于3.5的矿浆与浮选药剂进行搅拌,该产品分XB和XBT提升式搅拌桶, XBT提升式搅拌桶在对矿浆进行搅拌的同时可将矿浆液面提升到一定的高度,为此提升式搅拌桶对没有落差的选矿场地极为有利主要由槽体,支架,电机,叶轮及传动轴等组成。
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With Fisher ratio and variance analysis method it was found, the withinclasses and betweenclasses features of Reed, Chinese Tamarisk and Sea blite were all located in 350700nm and 350550nm respectively.
经Fisher比率法和方差分析发现芦苇、柽柳、翅碱蓬类内和类间特征均分别位于350~700nm和350~550nm之间。
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Result] The study showed that the content difference of the heavy metals in soils from Blumea balsamifera planting base in Guizhou Province was more large, and the variance coefficient ranged from 13.70% to 65.79%. Results of synthetical pollution index and nemerow pollution index showed that the soils were not polluted.
结果] 贵州省艾纳香种植基地土壤重金属含量水平差异较大,变异系数为13.70%~65.79%,均达国家土壤环境质量标准;综合污染指数与尼梅罗综合指数结果表明,调查区域内土壤未被污染。
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The RAPD results illustrate that the phylogenetic relationship betweenBothriocephalid tapeworm parasitic in Grass carpCtenopharyngodon idellus(C.et V.and Common carp(Cyprinus carpio L.)from different regions ofChina is infraspecific with noticeable variance bwtween them.Thephylogenetic trees based on the 3 sequences analyses above are constructed,which show the following relationships:Bothriocephalid tapeworms fromGrass carp,Common carp and Luciobrama are found to be monophyletic,and are very close to Bothriocephalus opsariichthydis,but are divergent toanother monophyletic group comprising Bothriocephalid tapeworms fromZacco,Hemiculter and Leuciscus.On the basis of phylogenetic reconstruction,autapomorphic species conceptis used in species delimitation suitablefor determining four species in the present study:B.acheilognathi,B.opsariichthydis,and two other bothriocephalids parasitic respectively inHemiculter and Leuciscus.It is also deduced that the differentiation time ofBothriocephalid tapeworms parasitic in cyprinids is earlier than that of theirhosts,and the most recent specification happened about one million yearsago.Key words Bothriocephalid tapeworm Molecular Systematics
具体成果有:通过RAPD分析探明了我国不同地理分布的草、鲤鱼头槽绦虫的亲缘关系属于种下水平,并存在较高变异;通过基因合并分析重建头槽绦虫的系统发育关系,表明草鱼、鲤鱼及鯮鱼头槽绦虫是单系群,它们与马口鱼头槽绦虫亲缘关系较近,而与〓条、宽鳍鱲及雅罗鱼头槽绦虫构成的另一单系群亲缘关系较远;在此基础上,提出符合头槽绦虫种的界定的独征物种概念,据此确定鲤科鱼类寄生头槽绦虫的四个种:鱊头槽绦虫,马口鱼头槽绦虫,以及另两种分别寄生于〓条和雅罗鱼的头槽绦虫:根据上述研究推断鲤科鱼类寄生头槽绦虫的分化年代早于其宿主,最近的一次物种形成距今约一百万年左右。
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.
这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。
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The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.
聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力