长庆油田苏平1井固井技术研究与应用

苏平l井完井方式运用了技术套管一次上返、悬挂尾管和筛管技术。该井技术套管段井眼大、裸眼段长，加上大斜度、小间隙的尾管段．对水泥浆体系的性能要求较高。总结分析了长庆天然气水平井苏平l井的固井技术问题，介绍了苏平l井的井身结构与地层性质。通过研究．确定采用低失水GSJ水泥浆体系。该体系成功地应用在三次工程建井过程中，解决了长裸眼、大灰量、大斜度、尾管小间隙等固井技术问题。固井质量达到工程要求。     

分子动力学在材料科学中的应用

分子动力学方法是进行物质原子或分子层次计算机模拟时所采用的一种基本方法。通过分子动力学模拟，可以给出原子尺度上材料及其演化过程细节的可能性，具有无先例的准确性，使材料设计和性能预测成为可能。本文分析了分子动力学模拟的基本原理和算法；综述了分子动力学在材料科学中的应用，介绍了最近发展的第一原理分子动力学模拟，指出材料科学中第一原理分子动力学模拟的应用还有待进一步发展。     

A generalized cycle life model of rechargeable Li-ion batteries

A generalized first principles based charge-discharge model to simulate the cycle life behavior of rechargeable Li-ion batteries has been developed. The model is based on loss of the active lithium ions due to the electrochemical parasitic reaction and rise of the anode film resistance. The effect of parameters such as depth of discharge (DOD), end of charge voltage (EOCV) and overvoltage of the parasitic reaction on the cycle life behavior has been quantitatively analyzed. The experimental results obtained at charge rate of 1 C, discharge rate of 0.5 C, EOCV of 4.0 V and DOD of 0.4 were used to validate the cycle life model. Good agreement between the simulations and the experiments has been achieved up to 1968 cycles. Simulation of a battery subjected to multiple cycling regimes has also been demonstrated.     

以实例为切入点的高职物联网应用技术专业教育第一课

物联网技术发展迅速,但高职物联网应用技术专业教育尚处于初期,因而科学、直观、紧扣实际、有效激发学生专业学习的第一课尤为重要。以物联网应用技术实例为专业教育切入点,采用阶梯式递进的方法带领学生走进物联网,感知物联网,从而充分调动学生专业学习积极性,更好地让学生了解专业人才定位,明确学习目标和就业方向,为整个物联网应用技术专业教育打下坚实基础。     

中和缓蚀剂Gibchem5911G的工业应用

叙述了中和缓蚀剂Gibchem5911G的缓蚀机理，以及缓蚀剂在中国石油大庆石化公司化工一厂裂解老区装置裂解气压缩机EC-301段间后冷器中的使用效果。通过对缓蚀剂注入前后EC-301段间后冷器中工艺凝液的pH值与总铁含量进行对比分析，可以看出该缓蚀剂可以改善压缩机段间后冷器中工艺凝液的pH值，能够有效地抑制后冷器腐蚀的发生。     

Bare necessities: the argument for a ‘revenge porn’ exception in Section 230 immunity

‘Revenge porn’ is the online posting of nude or sexually explicit photographs or videos of a former lover without his or her consent. Despite the malicious intent behind revenge porn, victims are provided with little to no relief due to Section 230 of the Federal Communications Decency Act, also known as the ‘Good Samaritan’ provisions. Section 230 unambiguously provides blanket immunity for website operators and Internet service providers that feature user-generated content, including revenge porn.

In Section 1, I discuss the purpose of Section 230 of the Communication Decency Act. In Section 2, I analyze the legal impact of the blanket immunity established in Section 230. In Section 3, I examine the potential remedies already in existence for revenge porn victims and highlight their inadequacies. In Section 4, I argue Congress should create a narrow exception to Section 230 immunity specifically geared toward revenge porn. The exception would establish a definition of revenge porn, which would prevent over-deterrence. Additionally, the exception would institute a takedown procedure similar to the process found in the Digital Millennium Copyright Act. In creating a narrow exception, the spirit of Section 230 will remain while also providing adequate legal relief for victims of revenge porn.     

八面河油田近年注水开发工作的实践与认识

八面河油田油藏类型多样,开发方式多样,其中注水开发储量占全油田动用储量的61%。近年来,为改善注水开发油藏开采效果,保持产量稳定,油田针对各区块注水开发中存在的问题,在面4区面5块、广北8块、面14区沙三上采取了完善注采井网,注水井注氮调剖,水井动态调水以及改善水质等方面的工作,初步取得了较好的效果。     

Implications of particle size to transient stage of deep bed filtration

This study was aimed at investigating the effect of particle size, mostly in the submicron range, on break-through stage of filtration. Latex beads, with diameters ranging from 0.46- to 2.967-μm were filtered through filter grains of diameters 0.1-, 0.175- and 0.45-mm. Experimental conditions were chosen so as to obtain breakthrough curves. The experimental results showed that the initial efficiency follows the pattern reported by previous experimental and theoretical studies, i.e., lower efficiency for 0.825-μm particles which fall in the range of critical size. However, the particle removal during the transient stage increased with an increase in particle size for the range of sizes studied. This pattern is qualitatively confirmed by the theoretical predictions of Vigneswaran and Chang (1986) model. This study also provides experimental verification of the effect of the ratio of particle size and grain size at different stages of filtration.     

二维直线运动平台几何误差建模与数字化分析

针对二维直线运动平台的定位精度受到绕X、Y、Z三个方向转动产生的角位移误差和沿着这三个方向的线位移误差的影响,采用一种基于三维模型的数字化方法对这些几何误差进行分析。通过参考坐标系和齐次变换矩阵建立二维直线运动平台几何误差运动学模型,并基于误差模型对运动平台的各项几何误差进行分配、计算和合成。基于以上误差分配原则对运动平台使用的导轨提出形位公差要求。通过上述工作,在虚拟样机设计阶段能对所设计结构几何误差进行预测,为后续精密运动的设计提供可靠的参考。     

《第一次的亲密接触》变异修辞分析

蔡智恒的语言具有浓厚的变异修辞特点,而《第一次的亲密接触》更是用口语对话的形式将这种特点发挥到淋漓尽致。其变异修辞在语音层面上表现为谐音变异;词汇层面主要表现为词语分拆、抽换语素、曲解语义、语义偏离、语体变异、色彩变异、语域变异、超常组词、方言夹用、简单符号变异;语法层面上表现为超常搭配、词类活用。