主成分分析 - Open Access .click

Results 51 to 60 of about 33,590 (182)

, 2016
電気通信大学200
角田猛
core +1 more source

Cantonese (Dis)investment by Cross‐Border Postgraduates in Hong Kong: Negotiating Competing Capitals and Multiple Identities Among Neoliberal Subjects

International Journal of Applied Linguistics, EarlyView.
ABSTRACT One key strategy that local universities and the government of Hong Kong have adopted in recent years is attracting more students from Chinese Mainland to study at Hong Kong's higher education institutions and contribute to society after graduation.
Lingnan Zhang, Yue Peng
wiley +1 more source

Characteristics and sources apportionment of water-soluble ions in PM2.5 of Wenzhou, Zhejiang Province(温州市PM2.5中水溶性离子污染特征及来源分析)

Zhejiang Daxue xuebao. Lixue ban, 2017
2015年1~12月在温州市区采集448个PM2.5样品，采用离子色谱法分析PM2.5中9种水溶性离子(、Cl-、Na+、K+、Ca2+、Mg2+和F-）的浓度，研究其污染特征、化学组分和来源.采样期间9种水溶性离子总浓度为39.97 µg • m-3，和占所测水溶性离子总量的(40.19±10.04)%.离子总浓度的季节变化特征为冬季>春季>秋季>夏季，从空间分布上看，多数季节市站采样点PM2.5中离子总浓度低于南浦、龙湾和瓯海采样点.相关性分析结果显示，PM2.5值与、Ca2+、Na+、K+、Cl-、
GELinlin(葛琳琳) +7 more
doaj +1 more source

(De)Legitimizing Language Policing: Enregisterment and Linguistic Authority in Taiwan's Digital Public

Journal of Sociolinguistics, EarlyView.
ABSTRACT This study investigates how ordinary Taiwanese netizens perform linguistic authority by policing others’ use of Mainland Chinese expressions in everyday online interactions not originally intended to be political and how such policing is subsequently supported, resisted, or (de)legitimized in the context of Taiwan–China relations. Three orders
Hsi‐Yao Su
wiley +1 more source

黄河三角洲贝壳堤岛土壤盐分空间分异特征

Shuitu Baochi Xuebao, 2016
对黄河三角洲贝壳堤岛贝壳砂基质和相邻滨海盐土的盐分特征进行调查研究，系统分析贝壳堤岛土壤盐分的空间异质性。选择不同地下水埋深梯度下2种土壤类型进行剖面盐分特征测定，比较研究土壤类型及地下水埋深对土壤盐分特征的影响，并应用主成分分析法对土壤盐分特征进行综合评价。结果表明：（1）除Ca2+外，贝壳砂基质剖面中其余盐分特征指标由表层至底层均呈现逐渐增高的趋势，Ca2+含量由上至下则呈现缓慢降低的趋势；（2）贝壳砂基质剖面盐分含量与地下水埋深密切相关，近海侧剖面(地下水埋深1.5 m)细颗粒含量、含水量 ...
董林水
doaj

The vesicle trafficking R‐SNARE VAMP714 connects auxin responses, ROS and ion homeostasis in Arabidopsis under salt stress

New Phytologist, EarlyView.
Network of VAMP714‐dependent interactions during salt stress. Summary Plant responses to salt stress include an altered root architecture mediated by ion imbalances, reactive oxygen species (ROS) accumulation, and altered hormonal responses. Auxin is implicated in these processes.
Jialei Sun +3 more
wiley +1 more source

制订护理科研方案

Huli yanjiu, 1989
目前我国护理人员所撰写的护理论文的形式大致可分为两大类即经验介绍类与病例分析类,主要以经验总结为主,而病例分析研究类较少、其主要原因之一是事先进行科研设计者较少,往往是根据以往的病历写成,从而造成了两条不可克服的弊端,其一是资料不全,缺项较多,其二是缺乏周密逻辑和完整的有力论据,从而影响了论文的质量.
韩世范
doaj

陇西县土壤氮储量的空间分布特征及其影响因素研究

Shuitu Baochi Xuebao, 2020
以陇西县600份土壤全氮含量数据为基础，应用地统计学研究陇西县土壤氮素的空间分布特征并计算了该区域的氮储量，采用相关性分析、主成分分析等方法探讨了影响全氮空间分布的影响因素。结果表明，陇西县土壤全氮含量为（0.734±0.306） g/kg，变异系数属于中等程度变异；氮密度平均值为0.091 kg/m2，氮储量为7.6×106 kg，其中0—10，10—30，30—50 cm土层氮储量分别占到0—50 cm土层氮储量的35.97%，7.06%，56.97%。陇西县土壤全氮含量及氮储量空间分布相似 ...
任建新, 唐亮, 何明珠, 韩国君, 张莉 +4 more
doaj

Forecasting the costs of residential construction based on support vector machine and least squares-support vector machine(基于SVM和LS-SVM的住宅工程造价预测研究)

Zhejiang Daxue xuebao. Lixue ban, 2016
为在方案设计初期与工程造价相关信息很少的条件下，准确快速地预测住宅工程造价，在分析既往相关理论和方法优劣的基础上，选取支持向量机构建住宅工程造价预测模型，并通过主成分分析对原始数据进行降噪处理.选取住宅工程造价预测指标集与样本，对输入指标的数据进行主成分分析，消除指标相关性的同时对原始数据降维，将处理后的数据分别导入到“标准支持向量机”和“最小二乘支持向量机”模型中进行训练和预测，并对预测结果进行对比分析，选取较为合理的预测模型，通过参数寻优进一步优化预测效果.所构建预测模型的相对误差均控制在±7%以内，
QINZhongfu(秦中伏) +3 more
doaj +1 more source

Powerful representation of the poor? German welfare associations' narrative advocacy during COVID‐19

Policy Studies Journal, EarlyView.
Abstract The COVID‐19 pandemic sparked unprecedented experimentation in the German social assistance system, leading to changes previously considered impracticable by policymakers. This included a sanctions moratorium, easier access to benefits, and temporary cash transfers, all of which were advocated by welfare associations—key organized interests ...
Christopher Smith Ochoa
wiley +1 more source

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