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Transition-metal-catalyzed C–H bond activation represents one of the most attractive research areas in organic synthesi......
Under dynamic loading,the constitutive relation of the cement mortar will be signif- icantly affected by the transversal......
Modified Lindstedt-Poincaré Method for Obtaining Resonance Periodic Solutions of Nonlinear Non-auton
A modified Lindstedt-Poincaré(LP) method for obtaining the resonance periodic solutions of nonlinear non-autonomous vib......
Mono-methyl hydrazine is one of supporting reagents in the Purex process in order to eliminate nitrous acid in the syste......
TiB2P/AI composite was successfully fabricated by squeeze casting technology. Its mechanical and tribological properties......
Microanalysis and preliminary pharmacokinetic studies of a sulfated polysaccharide from Laminaria ja
A rapid,sensitive and reproducible high performance liquid chromatography(HPLC) method with post-column fluorescence der......
Bulk amorphous Al_(85)Ni_(10)Ce_5 composite fabricated by cold hydromechanical pressing of partially
Gas atomized Al85Ni10Ce5 partially amorphous alloy powders were successfully consolidated into bulk alloy specimens with......
The proposed scheme is based on Discrete Fourier Transform (DFT) domain processing. The key technology of this scheme i......
This paper proposes a new structure to lower the power consumption of a variable gain amplifier(VGA) and keep the linear......
A servo control system is prone to low speed and unsteadiness during very-low-frequency follow-up. A design method of fe......
Background:To successfully eliminate malaria,an integrated system that includes a number of approaches and interventions......
In fault diagnosis of rotating machinery, Hilbert-Huang transform(HHT) is often used to extract the fault characteristic......
Overburden failure and the prevention of water and sand inrush during coal mining under thin bedrock
Coal mining under thin bedrock or thick unconsolidated soil layers brings mining problems related to these special geolo......
目的了解什邡市疟疾流行概况与防治历程,总结评估什邡市消除疟疾工作,为其他地区实施消除疟疾行动计划及开展评估工作提供参考和依......
The reaction of ethyl α-bromocinnamates with tetrabutyl ammonium fluoride (TBAF) was influenced largely by the position......
论文首先论述了引起广播发射射频系统中产生信号冲突的因素,之后对消除广播发射射频系统中产生的信号冲突的方法进行了研究,希望能......
本文以测定铅为例，研究了石墨炉升温程序的灰化技术，包括基体干扰的消除，基体改进剂和Ｌ‘ｖｏｖ平台的应用。......
介绍了一种超稳定、微细粒高悬浮物选矿废水处理的试验研究和工程实例.针对废水水质的特点,提出了先使胶体脱稳后絮凝沉降的工艺流......
按生态学方法建立和培育模型池塘生态系统，选择符合要求的生态池分别添加0.8mg·L^-1、4．0mg·L^-1、20．0mg·L^-1和100m......
本文较为详细地探讨了平面立体消隐算法和过程,尤其是在一些关键技术上提出了较为详细的处理方法和算法,以期对整个消隐过程建立一......
本文通过对油井采油工艺和油藏地质的分析,探讨了油井动态异常干扰影响因素与形成机制,确定了由非地震前兆因素引起的油井动态干扰......
目的分析鲍氏不动杆菌的质粒谱和耐药谱,找出它们的耐药基因位点.方法 K-B法检测35株鲍氏不动杆菌对21种抗生素的药敏情况,采用经......
在高校足球教学中学生或多或少存在畏惧心理，本文试图就学生存在的主观因素和客观因素在学习足球基本技术时产生畏惧心理的原因、特......
STUDY ON THE ADDITION REACTION OF 1-IODO-4-CHLOROPERFLOROBUTANE TO 1-HEXENE UNDER REDUCTIVE CONDITIO
Promoted by various reductants,the addition of 1-iodo-4-chloro-perfluorobutane to 1-hexene giving 1:1 adduct is reported......
鱼粉是配合饲料的重要蛋白源之一，它是饲料及畜产品、水产品的安全基础。排查鱼粉的质量安全隐患不仅对养殖业意义重大，更关系着人们......
自然推理系统中假设前提销去规则是指在引入假设前提推导出结论的过程中,运用蕴涵引入规则构造一个蕴涵式,从而销去假设前提。根据......
本文研究了基体元素钨对原子吸收光谱法测定微量铬的干扰影响,选用适当的高次方程对其干扰曲线进行拟合。利用一系列含有已知含量......
性别歧视在不同的社会制度和国家中都不同程度地存在。作为一种普遍的社会现象，自然会在语言中得到折射。介绍了英语中的性别歧视语......
经过三年来对南麂豚草(Ambrosia artemisiifolia)的生物学特性和发生规律的观察研究,确定了防除豚草的适期和除草剂;采用综合防除......
研究利用高效液相色谱法研究了强力霉素在斑点叉尾（Ictalurus punctatus）体内的药物动力学与消除规律,有助于制定合理用药方案和休......
针对多绕组多速电动机经常遇到的环流问题进行了分析，总结产生的原因，并通过８／６极绕组的实例分析得消除环流的一般性结论。......
[目的]探讨腹腔镜下卵巢内异症囊肿剔除术对卵巢功能和妊娠的影响。[方法]对40例卵巢内异症囊肿采用腹腔镜下卵巢内异症囊肿剔除术......
本世纪初清末推行“新政”,目的虽为维护清王朝自身统治 ,但某些措施在客观上有一定积极意义 ,其中在教育方面 ,第一次提出了普及......
信道测量是获取信道特性最有效最直接的方式之一。随着测量带宽的增加,测量精度的提升以及测量指标的丰富,在无线信道测量过程中消......
为消除建筑结构胶检测的干扰因素，对存在于温度、搅拌、脱泡、浇铸和胶粘、模具、基材、厚度控制、引伸计选择等方面的干扰因素进行......
离子渗金属中，工件表层合金贫化主要是由于离子轰击在工件表层造成一个严重的畸变层，畸变层原子具有高的扩散系数面非畸变层原子具有......
