刀具磨损在线监测技术的探讨

主要介绍刀具磨损产生的危害,在刀具加工过程中监测刀具磨损变化情况,举例多传感器中电机电流和声发射传感器获取刀具在磨损过程中的准确数据,对刀具的磨损信号进行信息反馈,并及时做出应对处理。     

Ultrasonic tomography and its applications in oilfield

INTRODUCTION Oil and water well is an important basic estab- lishment in oilfields. In many oilfields, there are many different damages in the well’s casing walls after its development for a period of time. They will affect the normal production of damaged wells and adversely influence the neighbouring wells and the block, and threaten steady production. There are different kinds of damages due to multiple problems in the casing walls, for example, corrosion, perforation, decreased diame…     

大气环境影响研究中应注意的几个问题

本文针对大气环境影响研究中，易被忽视或常常被误解的三个问题——非正常排放时的浓度预测问题、有效源高订正问题、烟囱参数设计合理性的论证问题，从理论、原理上提出了对这些问题的理解，还通过实例作了具体说明。     

Exit cards: creating a dialogue for continuous evaluation

This study explored the use of Exit Cards, which are formative evaluations of student knowledge and instruction undertaken at every class meeting. Its results are based on Exit Card data from two undergraduate research methods courses. Thematic analysis indicated that students used Exit Cards to communicate (1) what they learned, (2) challenges with course material, (3) experiences with peers, (4) requests for help, (5) challenges with coping, and (6) successes. While the present study is an initial exploration of the use of Exit Cards, it contributes to knowledge on the utilization of informal formative assessments.     

Pyramid Linear Prediction Coding for Images

lintroductionCompressionofdigitalimagesandvideosignalstoreducetheirstorageandtransmissionbandwidthrequirementsisofgreatinterestintheimplementationofcolnnlunicationsystems.Moreandmorecompressioncodingmethod$fordigitalimagesandvideosignalshavebeenproposedto…     

从工具价值理性到道德价值理性－－当代新科技条件下科学技术性质的转换

科学技术的性质如何，不仅应有横向的剖析，还要有纵向的梳理，才能提出接近真理的判断。从历史发展的视角看，大体可以划分为三个阶段：轻视科学技术阶段、积极运用科学技术阶段和自学控制科学技术阶段。与当代新兴科学技术的特点紧密相联系，以当代新兴科学技术与首先的内在联系为基石，科学技术从工具价值理性走向道德价值理性，进路的关键在于，提升科学工作的良心和道德责任感，强化企业的外部伦理约束和自我道德限制，使国家随之成为对科学发展和运用进行全局的、长期的战略规划与管理的综合性实体。     

基于有限元的护套线剥线机刀架疲劳强度分析

应用SolidWorks软件建立护套线剥线机主传动机构刀架三维实体模型,根据剥线机工作时的受力情况,利用有限元软件对刀架进行静力学和疲劳强度分析,获得刀架各项静力学参数图和疲劳寿命情况。该分析结果为护套线剥线机的设计提供理论依据,也为后续剥线机结构优化提供了技术支持。     

成形车刀截形尺寸公差分析

给出了确定成形车刀截形尺寸公差的计算法，并通过实例与查表法进行了比较，从而为准确、合理地确定截形尺寸公差提供了理论依据．     

评注性副词"差点儿"的蕴含和预设

从蕴含和预设的角度对"差点儿"的客观意义和主观意义进行了分析,分析了"差点儿"的语义预设和语用预设,并从预设的角度解释了羡余否定现象的产生.通过和评注性副词的比较,指出"差点儿"是介于描摹性副词和评注性副词之间的一个副词.