普通麻花钻寿命评定指标的综合评价

通过钻削铸铁试验,对钻头磨损过程特性进行了分析.首次从可靠性、灵敏性、稳定性、测量难易性和磨钝标准确定的方便性等几个方面对钻头寿命评定指标VB_c,VB_(c1),VB_(c2),VB_B,VB_R和ω_φ进行了综合评价.得出了指标VB_R和VB_c是钻削铸铁的较优的钻头寿命评定指标的结论,并指出了通过试验评价钻头的切削性能或钻头寿命时必须优化试验的切削条件和合理确定试验的磨钝标准.     

Preparation and Kinetics of the Thermal Decomposition of Nanosized CuC_2O_4-ZnC_2O_452H_2O

0 IntroductionMicaxteidon mse tianl onxeiwde ste hcahvneol voegriyesi .m pTohrteayn tc aanpp lbie-used as prospective materials for superior technicalceramics , materials for magnetic recording, manyelectronic components ,sensors ,catalysts as well asthe high-temperature superconductors .CuO/ZnO catalyst was one of the i mportantcatalysts applied for the catalytic generation of hy-drogenfromthe reaction of methanol with oxygeninthe presence of steam[1]. Since nanometer particlepossesses many…     

英语无灵主语句的汉译

英语无灵主语句是英语书面语中常见的一种独特语言现象。由于英汉思维方式以及语言之间的差异,中国学生不易理解和运用这类句子。本文对英汉翻译过程中经常遇到的英语无灵主语句型、有灵动词、无灵动词进行了探讨和分析。旨在加深对英语思维的了解和提高英汉翻译的质量。     

从“娶”看中国古代汉族的婚姻形态

从"娶"字可以看出中国古代汉族男主女从、女依男居的婚姻关系,女人在婚姻关系中有生育义务,中国古代汉族存在抢婚制和陪嫁婚制。     

一类轴向力与非线性外力混合作用下梁系统的整体解

研究了一类轴向力与非线性外力混合作用下梁系统整体解的存在唯一性,通过Galerkin方法证明了非线性项在适当条件下,该系统整体L∞(O,T;H40(Ω))解在不高于4维的空间中存在且唯一.     

A Novel High-Sensitivity Pressure Sensor: Thinned Fiber Bragg Grating with Pressure-Sensing Polymer

Based on thinned fiber Bragg grating and polymer material, we propose a novel high-sensitivity pressure sensor and obtained a new contribution to the pressure sensitivity, which is dependent on the derivative of the effective refractive index (RI) of core mode with respect to the surrounding medium RI, as well as on the relationship between the polymer RI and the pressure; moreover, it is inversely proportional to Young’s modulus of the polymer material. For the polymer with Young’s modulus of 1.0 MPa, the ...     

Local Extrema of Periodic Function’s Wavelet Transform

0IntroductionReancedntl myo,r ewa pverloebtlse marse , u sseudch as a as t toi omle t-for edqeualen cwyith an maloyr-esis[1-3], processing of signal[4], detection of singularity[5],approxi mation of function,and so on. Ti me-frequency analy-sis is researching the regulation of changes of signal in ti meandfrequency domain,andits final goal is to establish a kindof mathematics prototype or distributing, so as to describesignal’s energy or intensityinti me andfrequency,andthat isfeature extract…     

Criteria for Regularity of Elliptic Diffusion Processes and It’s Application

0　IntroductionThe concept of regularity plays an important and elemen tary role in both stochastic processes and probabilisticpotential theories. The result for Brownian Motion can befound in Ref.[1,2]. Blumenthal, Getoor and Chung have giv en man…     

A Recommendation Mechanism for Web Publishing Based on Sentiment Analysis of Microblog

Microblog is a social platform with huge user community and mass data. We propose a semantic recommendation mechanism based on sentiment analysis for microblog. Firstly, the keywords and sensibility words in this mechanism are extracted by natural language processing including segmentation, lexical analysis and strategy selection. Then, we query the background knowledge base based on linked open data(LOD) with the basic information of users. The experiment result shows that the accuracy of recommendation is within the range of 70%-89% with sentiment analysis and semantic query. Compared with traditional recommendation method, this method can satisfy users’ requirement greatly.     

英汉形容词标记性用法相异性之理据

本文用认知语言学的理论对英汉语中的度量形容词标记性用法相异性之理据进行了分析。英汉形容词标记性用法上表现出了高度的一致性,但是局部也存在着明显的差别。这种差别主要来自于不同语言的有关概念化方式、对立中和的条件、基本语义等的不同。这些分析有利于我们理解一些语言现象和加深对这些词的认识,也对英语学习者有一定裨益。