数控机床智能化的主要技术特征

随着时代和科技的不断进步,数控机床技术的发展不断的优化和完善,整体的数控机床的发展趋势逐步向智能化发展。而对于数控机床的技术的开发和应用也逐渐的受到相关的机床生产商和采购者的重视。因而从实际上来讲数控的智能化发展不仅对机床所加工的产品的质量有一定的影响,对于加工的效率的影响也是比较大的。在此基础上,本文将对数控机床智能化的主要技术特征进行有效的分析和研究,从而使得数控机床技术能够更加健康的发展和进步。     

浅谈英语课堂的有效教学

提高课堂教学的有效性,精心设计生动的、富有情趣吸引力的、形式多样的活动。教学的有效性是教学设计的生命,是学校教学活动的一个基本追求,它直接关系到教学的质量和人才的培养。加强教师自身素质的提高是课堂教学的有效性的重要前提,教师本身的能力高低会直接的影响到课堂教学质量。     

马克思主义视域下人性的二重性解读

在人性的问题上,马克思主义之前的哲学往往用静止的、孤立的、片面的、抽象的、形而上学的思维方法来解读人性.马克思主义哲学以实践为出发点,运用辩证的思维方式,对人性作出了全新的二重性的解读,认为人性是全面的、发展的、辩证的,是矛盾的统一体,是能动与受动、客观与主观、具体与抽象、变与不变的统一,是一个系统的、开放的、复杂的有机整体.     

部分城市生产资料价格周报

一品名规格条件I北京沈阳天津武汉长沙上海成娜西安白银兰妞广州.曰,朴挂牌26000260的2580026500262的25,502石印02?加O25800,月1,f成交257的256加257002630025?的肠以力舫以冲2650025500自口几n几内内挂称‘168的168的1650016别沁168的1645017加01‘创沁16600下口J、U才、肠月J成文166的164001630016500163的164加17的016右的16200自几1什挂脚6,的72Q0690069的7(期】1即0飞95012的70的,口1,f成交68加‘900680068的69的,1506加069的69的山立,朴挂脚95的9500980097的匀55095509夕00肠阅95的,甲1心宁成交94的9300950096加匀5的95的躺0095的…     

电气自动化在钢铁企业中的应用策略

当代社会的科学技术是在不断的发展的,经济建设取得了巨大的成就,在这样的时代背景下对钢铁行业也提出了新的技术要求。这样其实在一定的程度上也推动了钢铁的快速发展。传统的电气工程的主要的组成部分是接触器和继电器等低压电气设备来进行实现的。随着科学技术的发展,传统的电气工程技术已经不能适应当今社会的技术要求。所以电气工程必须向着智能化、自动阿虎的方向发展,才能推动整个钢铁行业的自动化的改革。新型的综合化的创新型技术是需要结合智能化、自动化以及电气化等方面的控制手段这样才能在钢铁行业之中取得一个良好的钢铁运行结果,从而促进整个工业经济的全面发展。     

晶体取向和极图测定

在冶金学研究和工程材料这两方面都应用了测定晶体取向信息的技术。机械和物理性能的研究,形变、再结晶和晶粒生长的研究,固态转变的研究,腐蚀速率的研究以及扩散的研究都常常包含有晶体取向的测定。另一方面,板材的塑性形变或磁性的各向异性这两者都起因于微晶的择优取向,对这一点的认识是控制这些材料的性能的基础。根据在深冲时会导致额外的不必要的修整和切头损失的制耳行为,形变的各向异性是明显的。通常,对磁性的各向     

现代遥感技术在地质找矿中的应用

随着社会的不断进步以及经济的快速发展,我国的地质矿产业也得到了较快的发展,进而就在一定程度上对找矿的速率提出了更高的要求。而不断的将现代遥感技术应用在地质找矿的过程中,对于有效的提高找矿的效率以及准确度,以及不断的促进我国矿产业的发展都具有至关重要的作用。因此,我们应不断的分析与研究现代遥感技术在地质找矿中的应用,进而不断的改进与创新现代遥感技术,以此来有效的提高我国的找矿效率,进而不断的促进我国矿产业的稳定发展。     

冶金工程中机械设备的安装施工及维护探讨

随着西安代社会的快速发展,先进的科学技术的出现,改变了人们的生活方式,针对各个行业的发展情况,我们引进先进的技术和管理经验来更好的处理相关的工作,这样才能突破传统的建设,从而实现更好的发展.冶金工程中机械设备的安装施工和维护工作非常的重要,我们需要根据实际的发展情况来有效的解决其中各项问题,这样才能实现更好的发展.     

从两维视角探讨马克思主义关于人的本质理论

"人的本质是一切社会关系的总和",这是马克思对人的本质的科学论断.笔者认为人的本质是类本质和现实本质的统一.从人与社会的关系和人与自然的关系这两维视角审视人的本质,是符合马克思主义关于人的本质的理论观点的,这对进一步研究马克思主义人的本质理论及其把握有着重要的现实意义.     

《手稿》中马克思的人道主义体现

<1844年经济学-哲学手稿>是马克思在年轻时代总结自己的思想和弄清思考的问题而写的一个未完成的手稿.手稿中,通过谈及一系列的经济问题,更多通过社会现实揭示当时的工人的不平等无休止的劳动,即异化劳动.马克思通过对人的实践本质的论证,形成了一种关注人、尊重人、维护人的人道主义.在对异化劳动的激烈批判中,更显露了他的人道主义的批判性和变革性.又在人的实践本质之现实的工业活动表现中,揭示了人道主义的自然发生性,提出人道主义要和自然主义相结合,最终形成了他的现实的、革命的、实践的人道主义.本文重点对手稿中的人道主义观的体现做一个简述.     

Slab-on-Grade versus Framed Slab

This paper presents comprehensive and practical engineering review (not mathematics or computer science paper) of the observed behavior of the two types of slabs that have been used for the bottom floor slabs, at grade and underground, of buildings in the United States and overseas. The typical design of the slab-on-grade (SOG) built in the United States is described. The design requires only nominal reinforcing steel, but modern day design also requires ground preparation and improvement as necessary, including underslab perforated drainage pipe network embedded in the granular subbase, riser pipes, and a series of pumps. Sealing at all slab isolation joints and waterproofing membrane or water barrier system are provided for water tightness. The framed slab is supported directly on the building framing and on the building foundation. The design can accommodate the soil and underground water pressure and in itself is watertight as the slab is cast monolithically with the structural walls and footings. The behavior of the SOG depends so much on the behavior (soil properties) of the soil strata on which the slab is resting on. It is sensitive to the variation of the soil conditions at and around building foundations, leading to uneven bumpy and cracked slab and leaking basement. These were demonstrated in the report of short- and long-term performances of various projects in Thailand and United States in the past 25 years. The paper refers to various analysis and design techniques that may be used to improve the design of both the SOG and the framed slab for serviceability and economy. It is concluded that both types of slabs may be selected to suit the functions and serviceability requirements of the buildings. The SOG requires less concrete and reinforcement than those for the framed slab counterpart, but when all other factors are considered including additional underslab drainage and pump system, operating, and long-term performance and maintenance, the overall costs of both slabs may not be far apart, yet the performance and integrity of the framed slab will certainly be superior.     

Formation and Evolution of the Jiuduansha Shoal over the Past 50 Years

The formation and geomorphic evolution of the Jiuduansha Shoal are investigated over the past 50 years in this paper. The sedimentary processes, formation, and geomorphic evolution of the Jiuduansha Shoal in the Yangtze River Estuary, eastern China, are analyzed based on digitized sea maps from 1945 to 2001, satellite images from 1975 to 2001, and field survey data in the spring-neap tidal cycle in the dry and flood seasons in 2003. The suspended sediment concentration and hydrodynamics of the North Passage and South Passage during the dry and flood seasons in the spring-neap tidal cycle in 2003 were investigated, and relations between the North Passage and South Passage of the Jiuduansha Shoal are analyzed. Results show that seasonal and spring-neap tidal cycle variations in sediment and water discharge from the drainage basin correspond to erosion and deposition on the Jiuduansha Shoal. The results and data can provide useful information for the management of the Yangtze River Estuary and restoration of the estuarine tidal flat ecology.     

铜萃取电积厂的设计探讨

根据长期的设计工作经验和生产实践,针对铜萃取电积工艺设计的相关问题进行探讨,并提出适用的设计方案。其中,工艺部分包括铜萃取电积工艺方案的确定、萃取剂的选用、相连续的控制等;设备及厂房布置部分探讨了设备和管路的适宜材质,溶液池容积和结构形式、设备选择和厂房布置方式;根据车间生产介质的性质采用相应的消防方式;最后介绍了该工艺的投资成本及技术经济指标。     

以数字基建支撑钢铁行业内涵式发展

 为了研究数据在钢铁行业的生态化利用问题,介绍了中国钢铁行业发展面临的新形势,以及新发展阶段对钢铁企业的新型能力要求,阐述了钢铁行业存在的问题及发展趋势,分析了钢铁行业数据资源特点及数字赋能基础,数据要素与土地、劳动力、资本、技术等传统生产要素不断交叉融合,从提升企业核心竞争力、优化行业资源配置、支撑政府行业治理3个层面,总结了钢铁行业数据发力的重点领域,提出以基于区块链的“数字基建”构建行业新型信用体系,支撑钢铁内涵式发展。     

Analysis of Arch Dams Using Coupled Trial Load and Block Element Methods

This paper presents the use of the trial load method and the block element method with elastoviscoplastic discontinuities for analysis of arch dams. The arch dam is considered as an arch-cantilever system and the foundation as a block element system. With the displacement compatibility condition at the contact surface of the dam and the foundation (including abutment), the governing equations of the arch dam and foundation are established. These methods are used for the analysis of the double curvature arch dam with complex geology conditions of the Xiaowan Hydroelectric Project in China. The deformation and stress states in both the dam body and the foundation are determined. Furthermore, the stability safety factors of the foundation and the abutment are calculated at the same time, which allows for an optimal design of the arch dam considering the strength, the deformation and the stability of the dam and foundation.     

Comprehensive Composite Inelastic Fiber Element for Cyclic Analysis of Concrete-Filled Steel Tube Columns

This paper presents the development of a comprehensive composite beam-column fiber element for large displacement nonlinear inelastic analysis of concrete-filled steel tube (CFT) columns. The bond/slip formulation represents the interaction between concrete and steel over the entire contact surface between the two materials. Thus, the modeling accounts for the two factors that cause the slippage between steel shell and concrete core. The first factor is the difference between axial elongation of the steel shell and the concrete core, and the second is the difference between curvatures in the cross section for the concrete core and the steel shell. These effects are integrated over the perimeter and are added to the virtual work expression of the basic element. Furthermore, the constitutive models employed for concrete and steel are based on the results of a recent study and include the confinement and biaxial effects. A 13 degree of freedom (DOF) element with three nodes, which has five DOF per end node and three DOF on the middle node, has been chosen. The quadratic Lagrangian shape functions for axial deformation and the quartic Hermitian shape functions for the transverse directions are used. The model is implemented to analyze several CFT columns under constant concentric axial load and cyclic lateral load. The effect of semi- and perfect bond is investigated and compared with experiments. Good correlation has been found between experimental results and theoretical analyses. The results show that the use of a studded or ribbed steel shell causes greater ultimate strength and higher dissipation of energy than the columns with nonstudded steel shells.     

RC Slabs Strengthened with Prestressed and Gradually Anchored CFRP Strips under Monotonic and Cyclic Loading

This paper presents the test results of reinforced concrete slabs strengthened with prestressed and gradually anchored carbon fiber–reinforced polymer (CFRP) strips under monotonic and cyclic loading. To take full advantage of the externally bonded CFRP technique, it is beneficial to apply the laminates in a prestressed state, which relieves the stress in the steel reinforcement and reduces crack widths and deflection. The aim of the monotonic tests was to determine the strengthening efficiency of the new prestressing technique and to investigate serviceability and ultimate states. The cyclic tests were performed to identify the fatigue behavior of the strengthened slabs and to investigate the influence of long-term cyclic loading and elevated temperature on the bond properties of the prestressed CFRP laminates and the ductility and flexural strength of the strengthened slabs. A nonlinear analytical model of reinforced concrete members strengthened with passive and prestressed CFRP strips under static loading is proposed in the paper. A comparison of the experimental and predicted results reveals an excellent agreement in the full range of loading.     

Dilatational and Compacting Behavior around a Cylindrical Cavern Leached?Out in a Solid–Fluid Elastic Rock Salt

A fluid-filled cylindrical cavern of circular cross section in a homogeneous infinite fluid-saturated polycristalline (salt) formation subjected to isotropic stress is set under internal pressure that differs from the confining pressure. The fluid in the cavern and in the mixture is treated as ideal and the solid as elastic. The state of stress that is established as a consequence of an outside pressure and a cavern pressure serves as the reference state. Perturbing the cavern pressure induces small changes in the solid and fluid densities and in the solid displacements. We compute these and other fields as functions of the radial distance from the cavern center and show that, depending on the relative stress levels, the (salt) formation experiences either a dilatation or a compaction that is highly concentrated in a thin boundary layer near the cavern wall and tapers off as one moves away from it. The amount of dilatation/compaction of the cylindrical wall and the thickness of the boundary layer grow with an increase in the difference between the referential confining pressure and the pressure in the cavern.     

钛渣酸解过程中物相变化特征探讨

明确物相变化是剖析钛渣酸解机理和改进酸解工艺的关键点之一。综合应用化学分析、X射线衍射(XRD)分析、矿物解离分析以及扫描电镜形貌分析对某74钛渣酸解过程中主要物相的含量、形貌变化以及Ti、Si两种元素的含量及赋存变化进行了研究。结果表明:钛渣主要由黑钛石和辉石组成,酸解过程中黑钛石含量逐渐减小,辉石含量逐渐增加;反应过程中,酸主要以扩散的形式渗透到黑钛石颗粒表面及内部孔缝,从而分解黑钛石;酸解前后,辉石形貌无明显变化,但随反应深入,其解离度逐步提高;钛渣中Ti元素主要赋存于黑钛石中,Si元素主要赋存于辉石中,部分赋存于黑钛石和黑钛石-辉石混合物中,反应过程中Ti元素主要由黑钛石向TiOSO₄迁移,部分迁移至黑钛石-辉石混合物中;Si元素迁移并主要富集于辉石以及黑钛石-辉石混合物中。     

火炮身管用钢现状及发展趋势

火炮身管用钢决定了身管类武器的使用性能,影响火炮的作战持续性与机动性。通过对国内外火炮身管用钢合金成分体系、制造工艺流程、材料主要性能指标总结分析,指出当前国内外炮钢主要牌号、性能水平以及存在高温性能不足的问题。通过调研国内外火炮用钢最新研究成果以及身管武器整体技术需求,总结和展望了火炮身管用钢的研究现状和发展趋势,针对大口径火炮研制高强韧炮钢以减轻壁厚和质量,针对中小口径速射火炮研制耐烧蚀性能炮钢以提高使用寿命。