短文厚读 浅文深解——以《陈太丘与友期行》为例

语文教学过程中经常存在一些对篇幅较短的文章讲不深、讲不透的问题。本文试图通过具体的文本解读实践来进行一些探索,从而实现短文厚读、浅文深教,更好地引领学生思维的发展。

渤海油田疏松砂岩储层深穿透解堵技术研究及应用

渤海疏松砂岩储层堵塞范围随着开发生产周期越长而越来越深,常规酸化难以解除储层深部堵塞,解堵难度越来越大。针对这一问题,本文提出了深穿透解堵的技术思路并阐述其作用机理,通过三维物模实验和CMG数值模拟方法,研究疏松砂岩起裂及其渗流形态,建立疏松砂岩深穿透解堵产能分区计算模型,探讨了深穿透解堵增产效果,并以渤海疏松砂岩储层E1井为例,结合解堵液体系优选和施工参数优化进行了现场试验。结果表明,疏松砂岩能形成有利的双翼水力裂缝,解堵液在地层中的渗流形态呈“哑铃型”分布,深穿透解堵技术能大幅提高解堵效果;深穿透解堵可以在不破坏原有防砂管柱情况下,在地层中形成人工裂缝,解除近井筒和储层深部的堵塞,增加油井产能。本文研究成果为渤海油田疏松砂岩储层深部解堵提供了有效的技术手段。

高压喷砂水射流深穿透解堵技术的研究与应用

高压喷砂水射流深穿透解堵技术是通过水力喷砂射流割缝 ,穿透近井地带污染区 ,增大油水井的渗流面积 ,达到增产增注效果的一项油层改造新技术。介绍了该技术的原理、工作参数的确定、选井条件、设计原则以及施工工艺。该技术在东辛油田低渗油藏应用取得了明显的经济效益和社会效益 。

渤海疏松砂岩深穿透解堵新工艺研究及应用

随着油田开发进入中后期,储层堵塞范围逐渐加深,堵塞形式也愈加复杂,解堵难度逐渐加大。本文提出一种深穿透解堵新工艺,利用深部造缝与化学解堵相组合,在污染带内形成高渗透性渗流通道,实现储层的深部解堵及潜力层挖潜。并通过理论分析及模拟计算相结合,进一步验证了其增产的可行性,增产效果受造缝长度、解堵液效率、解堵液滤失范围的影响,且存在最优造缝长度;通过实验研究及机理分析提出了弱交联造缝体系,并配套形成了高效解堵液体系,对渤海疑难杂症井此工艺现场应用效果显著,具有较好的推广应用价值。

解读《大红灯笼高高挂》中色彩对于电影意蕴的表达

以电影中的色彩为主线，运用视觉心理的视角对《大红灯笼高高挂》的画面色彩进行分析，说明色彩的运用对于强化主旨、深解电影意蕴的功能，引发观众更深刻的文化思考，从而使作品具有更高层次的文化意蕴。

解读物语 品味诗情

我们的语文教学要努力让物语成为学生领悟诗情的桥梁,让学生通过这座桥梁走进中华古文化这座魅力之城。

国内外深空探测器精密定轨软件研究综述及WUDOGS简介

深空探测器精密定轨软件系统的研制在深空探测活动中是一个非常重要的环节,一直受到各大航天机构的重视。针对国内外深空探测器精密定轨软件平台的研究现状,重点介绍了具有代表性的美国JPL(Jet Propulsion Laboratory,喷气推进实验室)的DPTRAJ/ODP(Double Precision TRAJectory program/Orbit Determination Program,双精度轨道程序/定轨程序)和MONTE(Mission analysis,Operations,and Navigation Toolkit Environment,任务分析、操作和导航工具箱环境),GSFC(Goddard Space Flight Center,戈达德航天飞行中心)的GEODYN-II以及法国CNES(Centre National dEtudes Spatiales,国家空间研究中心)的GINS(Géodésie par Intégrations Numériques Simultanées,同步数值积分大地测量)软件系统,对这些软件的结构与功能进行了总结。之后对武汉大学自主研制的深空探测器精密定轨软件系统WUDOGS(Wuhan University Deep space Orbit determination and Gravity recovery System,武汉大学深空探测器精密定轨与重力场解算软件系统)的主要模块与功能进行了介绍,通过与GEODYN-II的交叉对比验证,表明:对于探测器的轨道预报,WUDOGS与GEODYN-II的1个月位置差异小于0.3mm,2d位置差值小于5×10^(-3) mm;双程测距、双程测速的理论计算值和GEODYN-II的差值RMS(Root Mean Square,均方根)分别在0.06mm,0.002mm/s的水平;WUDOGS目前已初步具备了月球和火星探测器精密定轨能力。最后对WUDOGS的下一步发展方向进行了展望。

弱凝胶驱后中低渗储层解堵室内研究

针对海上L油田弱凝胶驱后中低渗储层出现的堵塞问题,采用室内实验的方法,分析注入井堵塞物有效成分,并结合国内外物理、化学解堵工艺,开展中低渗层解堵室内实验研究。实验结果表明,L油田弱凝胶注入井堵塞物成分主要为水和聚合物凝胶,描电镜成像显示堵塞物为具有一定交联结构的聚合物凝胶包裹黏土颗粒和无机晶核形成的复杂结构。采用电加热解堵工艺100~120℃高温处理72h,解堵效率可达40%~50%。自制氧化剂YH-1对弱凝胶体系和模拟堵塞物降解率达87%~92%。深穿透解堵工艺扩孔体系对模拟聚合物垢样降解率达99%,储层解堵长度可以达到12m以上。

生物接触氧化法在炼油废水回用处理中的应用

利用生物接触氧化法对炼油厂的外排污水进行深度处理,在曝气时间大于3h的情况下,可以有效地降低COD、氨氮,伴随硝化反应的发生,出水的碱度也下降。当停留时间足够时,水气比对水中溶解氧的浓度影响不大,较低的有机物浓度成为微生物降解活动的限制因素。经过生物接触氧化处理后的污水的腐蚀速率反而升高,体现出微生物的腐蚀作用和硝化反应的作用。

Testing Analysis of Composite Ground with Grouting Piles and Deep Mixing Piles

This paper discusses a new technique to improve soft ground with grouting piles and deep mixing piles. The bearing capacity of composite ground and the stress ratio between piles and soil is discussed by means of the static test. Based on Mindlin solution and Boussinesq solution, the additional stress and settlement of the composite ground are acquired.Compared the practical value with calculation, a better calculating method is confirmed.

BP神经网络改进算法预测水质浓度的应用

探讨了黄河兰州段地表水水质浓度预测的 BP神经网络法 ,建立了一种动态的、及时的、超前的 BP神经网络预测模型 .并在标准算法的基础上用 2种改进算法同时进行比较 .结果表明 ,改进的 BP算法在水质浓度预测中更能胜任 ,时间短。

基于TLE和SDP4模型的GPS+北斗混合系统DOP值模拟

以卫星两行轨道根数(TLE)和简化常规/深空扰动的近似解析解(SGP4/SDP4)模型预报卫星的空间位置,并以南京地区某地面站为例,分析了单北斗、单全球定位系统(GPS)和GPS+北斗3种卫星定位系统下南京地区的精度衰减因子(DOP)在2013-05-16—2013-05-23 1周时间的变化特点,以指导制定地面全球导航卫星系统(GNSS)观测方案。该分析可增强对GPS和北斗系统定位精度了解。

An enhanced hybrid ensemble deep learning approach for forecasting daily PM_(2.5)

PM_(2.5) forecasting technology can provide a scientific and effective way to assist environmental governance and protect public health.To forecast PM_(2.5),an enhanced hybrid ensemble deep learning model is proposed in this research.The whole framework of the proposed model can be generalized as follows:the original PM_(2.5) series is decomposed into 8 sub-series with different frequency characteristics by variational mode decomposition(VMD);the long short-term memory(LSTM)network,echo state network(ESN),and temporal convolutional network(TCN)are applied for parallel forecasting for 8 different frequency PM_(2.5) sub-series;the gradient boosting decision tree(GBDT)is applied to assemble and reconstruct the forecasting results of LSTM,ESN and TCN.By comparing the forecasting data of the models over 3 PM_(2.5) series collected from Shenyang,Changsha and Shenzhen,the conclusions can be drawn that GBDT is a more effective method to integrate the forecasting result than traditional heuristic algorithms;MAE values of the proposed model on 3 PM_(2.5) series are 1.587,1.718 and 1.327μg/m3,respectively and the proposed model achieves more accurate results for all experiments than sixteen alternative forecasting models which contain three state-of-the-art models.

Permanent versus disconnectable FPSOs

Floating production storage and offioading （FPSO） vessels offer a cost-effective field development solution, especially in deepwater areas lacking an adequate pipeline network. Most FPSOs are permanently moored, i.e. the complete system is designed to withstand any kind of extreme environment at the field location. FPSOs that can be quickly disconnected from their moorings and risers have also been designed and deployed. The key feature of this type of disconnectable FPSO is that it can be disconnect and so avoid dangerous environmental conditions such as icebergs, hurricanes in the Gulf of Mexico and typhoons in the South China Sea. In this paper, the concept of disconnectable FPSOs for deepwater field development is presented. Key technologies and their engineering analyses are highlighted. The merits and demerits of disconnectable vs permanent FPSOs are then evaluated. The paper concludes that both permanent and disconnectable FPSOs are versatile floating systems and their selection depends on safety, technological, cost and operational considerations.

Core discing characteristics and mitigation approach by a novel developed drill bit in deep rocks

Core discing often occurs in deep rocks under high-stress conditions and has been identified as an important characteristic for deep rock engineering.This paper presents the formation mechanism of core discing firstly.Then,the interaction between diamond drill bits and rock was analyzed based on numerical modeling.A novel drill bit with an inner conical crown for the mitigation of core discing was designed and verified by simulation experiments.The mitigation method was applied in the cavern B1 of CJPL-Ⅱand satisfactory results had been achieved.The percentage of core discing had been obviously decreased from 67.8%when drilling with a rectangular crown drill bit,to 26.5%when an inner conical crown drill bit had been adopted.This paper gives full insight into core discing characteristics and provides a new method for core discing mitigation;it will potentially contribute to stress measurement in deep rock engineering.

Monitoring method of gear teeth failure of hydraulic gear pump based on improved VMD and DBN-DNN of electrical signal

Abundant system operation state information is included in the electrical signal of the hydraulic system motor.How to accurately extract and classify the operation information of electrical signal is the key to realize the condition monitoring of hydraulic system.The early fault characteristics of hydraulic gear pump hidden in the motor current signal are weak and difficult to extract by traditional time-frequency analysis.Based on the correlation coefficient and artificial bee colony algorithm(ABC),the parameter optimization of variational mode decomposition(VMD)is realized in this paper.At the same time,the principle of maximum signal correlation coefficient and kurtosis value is adopted to determine the effective intrinsic mode function(IMF).Moreover,the permutation entropy(PE)and root mean square(RMS)of the effective IMF components are input into the deep belief network(DBN-DNN)as high-dimensional feature vectors.The operation state of gear pump is monitored.The results show that the weak characteristics of current signal of gear pump fault are accurately and stably extracted by this method.The running state of gear pump is monitored and the accuracy of gear fault diagnosis is improved.

Analytical Modeling of Threshold Voltage for Double-Gate MOSFET Fully Comprising Quantum Mechanical Effects

The analytical solutions to 1D Schrdinger equation (in depth direction) in double gate (DG) MOSFETs are derived to calculate electron density and threshold voltage.The non uniform potential in the channel is concerned with an arbitrary depth so that the analytical solutions agree well with numerical ones.Then,an implicit expression for electron density and a closed form of threshold voltage are presented fully comprising quantum mechanical (QM) effects.This model predicts an increased electron density with an increasing channel depth in subthreshold region or mild inversion region.However,it becomes independent on channel depth in strong inversion region,which is in accordance with numerical analysis.It is also concluded that the QM model,which barely considers a box like potential in the channel,slightly over predicts threshold voltage and underestimates electron density,and the error increases with an increasing channel depth or a decreasing gate oxide thickness.

Synthesis of novel silica-supported chelating resin containing tert-butyl 2-picolyamino-N-acetate and its properties for selective adsorption of copper from simulated nickel electrolyte

A novel silica-supported tert-butyl 2-picolyamino-N-acetate chelating resin (Si-AMPY-1) was successfully synthesized and characterized by elemental analysis, FT-IR, SEM and 13 C CP/MAS NMR. The adsorption behaviors of the Si-AMPY-1 resin for Cu(Ⅱ) and Ni(Ⅱ) were studied with batch and column methods. The batch experiments indicated that the Si-AMPY-1 resin adsorbed Ni(Ⅱ) mainly via physisorption, while adsorbed Cu(II) via chemisorption. The column dynamic breakthrough curves revealed thatthe Si-AMPY-1 resin can efficiently separate Cu(Ⅱ) from the simulated nickel electrolyte before the breakthrough point. Moreover, the concentration of Cu(Ⅱ) in the column effluent was decreased to be less than 3 mg/L within the first 43 BV (bed volumes), and the mass ratio of Cu/Ni was 21:1 in the saturated resin, which completely satisfied the industrial requirements of the nickel electrorefining process. Therefore, it was concluded that the Si-AMPY-1 resin can be a promising candidate for the deep removal of Cu(Ⅱ) from the nickel electrolyte.

RESEARCH ON DEEP COAL SEAM MINING FLOOR STARTA WATER BURSTING INFLUENCED FACTORS BASED ON ANALYTIC HIERACHY PROCESS

Deep coal seam mining floor strata water bursting is a complicate nonlinear system, whose factors are coupling and influencing themselves. It built the analytic structure model for deep coal seam mining floor strata water bursting, the judgment matrix was found by the expert scoring method, the contribution weights of the influenced factors were given out by the equation analytic process. The thirteen controlling factors and five main controlling factors were put award by analyzing weights, so the result was basically conform to the field practice. The expert scoring method and analytic process can convert the objective fact to the subjective cognition, so it is a method that can turn the qualitative into the quantitative. This can be relative objectively and precisely to study the question of many factors and grey box.

联合疗法对第3腰椎横突综合征患者的疗效观察

目的探讨针刀松解腰背深筋膜法结合离子导入法对第3腰椎横突综合征患者下肢局部张力及生物力学指标的影响。方法选取我院收治的第3腰椎横突综合征患者123例作为研究对象,按照随机数字表法分为对照组(61例)和观察组(62例)。对照组给予正清风痛宁注射液离子导入治疗,观察组在对照组的基础上予以针刀松解腰背深筋膜法治疗。14 d后,对比两组患者的临床疗效,随访6个月比较两组腰椎疼痛程度、腰椎功能改善效果、下肢局部张力、生物力学及不良反应发生情况。结果治疗后,观察组临床疗效优于对照组(P<0.05),视觉模拟评分(VAS)、简体中文版Oswestry功能障碍指数评分(SC-ODI)低于对照组(P<0.05),日本骨科协会下腰痛评分(JOA)高于对照组(P<0.05),组织能量吸收比及张力500 g位移高于对照组(P<0.05);两组不良反应发生率比较,P>0.05。结论针刀松解腰背深筋膜法结合离子导入法应用于第3腰椎横突综合征患者中通过提高患者下肢局部张力及改善生物力学情况,降低患者疼痛,改善患者腰椎功能从而有效提高临床疗效,且安全性较好。