Application of Pore Evolution and Fracture Development Coupled Models in the Prediction of Reservoir "Sweet Spots" in Tight Sandstones

The Chang-63 reservoir in the Huaqing area has widely developed tight sandstone ＂thick sand layers, but not reservoirs characterized by rich in oil＂, and it is thus necessary to further study its oil and gas enrichment law. This study builds porosity and fracture development and evolution models in different deposition environments, through core observation, casting thin section, SEM, porosity and permeability analysis, burial history analysis, and ＂four-property-relationships＂ analysis.

Development and Application of a Shaft-type Tubular Pumping System with a Siphon Discharge Passage

Based on the characteristics of large flow rate , low head , short annual operation time , and high reliability of the city flood-control pumping stations , a new-type shaft tubular pumping system featuring a shaft suction box and a siphon-type discharge passage with a vacuum breaker as the cutoff device was developed , which possesses such advantages as simple structure , reliable cutoff , and high energy performance.Taking some pumping stations as the case studies , in the light of the specified operation conditions , the hydraulic optimal design of the shaft-type tubular pumping system was determined and the optimized shape of the system was recommended.The performance prediction based on the computational fluid dynamics methodology was determined and the model test verification was conducted.The results show that the predicted data agree with the experimental head and efficiency so that both methods can be used to determine the performance of a real pumping station.Finally , the in-situ measurements of a pumping station during the commissioning period further verified that the shaft-type tubular pumping station with a siphon discharge passage is of higher efficiency , more reliable and stable.

Progress in the development and application of plant-based antiviral agents

Plant virus disease is one of the major causes of biological disasters in agriculture worldwide. Given the complexity of transmission media and plant disease infection mechanisms, the prevention and control of plant viral diseases is a great challenge, and an efficient green pesticide is urgently needed. For this reason, when developing candidate drug leads to regulate plant viruses, pesticide experts have focused on characteristics such as low pesticide resistance, eco-friendliness, and novel mechanism. Researchers have also theoretically investigated the molecular targets of viruses infecting agricultural crops. Antiviral screening models have been constructed based on these molecular targets, and the mechanisms of commercial drugs and high-activity compounds have been extensively investigated. After screening, some compounds have been applied in the field and found to have good commercial prospects; these drugs may be used to create new green antiviral pesticides to control plant viruses. This paper reviews the screening, mode of action, development and application of recently used plant-based antiviral agents.

A Novel Lifecycle Model for Web-based Application Development in Small and Medium Enterprises

Software engineering＇s lifecycle models havc proven to be very important for traditional software development. However, can these models be applied to the development of Web-based applications as well？ In recent years, Web-based applications have become more and more complicated and a lot of efforts have been placed on introducing new technologies such as J2EE, PhP, and .NET, etc., which have been universally accepted as the development technologies for Web-based applications. However, there is no universally accepted process model for the development of Web-based applications. Moreover, shaping the process model for small medium-sized enterprises （SMEs）, which have limited resources, has been relatively neglected. Based on our previous work, this paper presents an expanded lifecycle process model for the development of Web-based applications in SMEs. It consists of three sets of processes, i.e., requirement processes, development processes, and evolution processes. Particularly, the post-delivery evolution processes are important to SMEs to develop and maintain quality web applications with limited resources and time.

A STRESS VECTOR-BASED CONSTITUTIVE MODEL FOR COHESIONLESS SOIL (Ⅱ)-APPLICATION

The stress vector-based constitutive model for cohesionless soil, proposed by SHI Hong-yan et al., was applied to analyze the deformation behaviors of materials subjected to various stress paths. The result of analysis shows that the constitutive model can capture well the main deformation behavior of cohesionless soil, such as stress-strain nonlinearity, hardening property, dilatancy, stress path dependency, non-coaxiality between the principal stress and the principal strain increment directions, and the coupling of mean effective and deviatoric stress with deformation. In addition, the model can also take into account the rotation of principal stress axes and the influence of intermediate principal stress on deformation and strength of soil simultaneously. The excellent agreement between the predicted and measured behavior indicates the comprehensive applicability of the model.

Meta to the Rescue—Augmented Metamodels for Better Deployment of Pre-Packaged Applications

Recent estimates indicate that more than half the software market belongs to enterprise applications. One of the greatest challenges in these is in conducting the complex process of adaptation of pre-packaged applications, such as Oracle or SAP, to the organization needs. Although very detailed, structured and well documented methods govern this process, the consulting team implementing the method must spend much manual effort in making sure that the guidelines of the method are followed as intended by the method author. The problem is exacerbated by the diversity of skills and roles of team members, and the many sorts of communications of collaboration that methods prescribe. By enhancing the metamodel in which the methods are defined, we automatically produce a CASE tool (so to speak) for the applications of these methods. Our results are successfully employed in a number of large, ongoing projects with demonstrable, non-meager saving.

Development of a global high-resolution marine dynamic environmental forecasting system

全球海洋环境安全预报保障能力的提升,是我国海洋强国战略和参与全球海洋治理的重要保障。在过去的五年中,国家海洋环境预报中心完成了没有全球保障能力到初步建立的过程,但是现有的全球海洋环境安全保障系统,无论是在精度还是深度上都不能满足需求,因此建立具有自主知识产权高分辨率的全球海洋动力环境数值预报系统迫在眉睫。因此,科技部海洋环境安全保障专项支持了‘全球高分辨率海洋动力环境数值预报系统研制’项目的立项。本项目(1)通过开展现场观测与实验室试验,研究海洋多尺度混合并优化物理参数化方案;(2)发展自主全球高分辨海洋环流、潮汐潮流、海浪及浪-潮-流耦合数值模式,发展海气耦合预报技术;(3)建立自主知识产权高分辨率的全球海洋动力环境数值预报系统,开展集成应用研发,全面提升我国自主能力与预报水平,实现中尺度现象的稳定识别和业务预报,精度达到国际同类预报产品水平。

高职院校思政课“云上”实践教学资源开发与创新——以沙洲职业工学院为例

通过对思政课“云上”实践教学资源的研究,开展对思政课“云上”实践教学资源平台的逻辑建构和路径构建。与思政课程内容相结合,开发出一套融合地方区域特色的思政课“云上”实践教学资源平台,创新思政课实践教学模式,推进思政课教育教学改革。

THE APPLICATION AND DEVELOPMENT OF TURBULENCE MODELS IN BUOYANT RECIRCULATING FLOWS

In this paper, a modified κ-ε turbulence model, a simplified algebraic stress model and a developed two-fluid model have been presented based on numerical modeling of turbulent buoyant recirculating flows. The calculated results by these models are in good agreement with experiments. However, the last model is much better for simulating gravity-stratified flows.

基于Zienkiewicz-Pande屈服准则的弹塑性本构模型在FLAC^(3D)中的二次开发及应用

Zienkiewicz-Pande屈服准则是Mohr-Coulomb准则的改进,在p-q子午面和π平面上都是光滑曲线,不存在尖点,不仅在数值迭代计算过程中易于处理,而且在一定程度上考虑了屈服曲线与静水压力的关系以及中主应力σ2对屈服的影响。该准则已应用于多个水电站地下洞室开挖支护计算中,但并未被大型数值计算软件所采用。根据弹塑性力学原理,详细推导了基于Zienkiewicz-Pande屈服准则的弹塑性本构模型在FLAC3D中的增量迭代计算格式;在FLAC3D提供的二次开发程序接口基础上,利用VC++程序语言实现了计算过程,并编译成动态链接库文件进行加载和调用。将自编的本构模型对一理想圆形隧洞进行模拟,计算结果与Mohr-Coulomb准则一致,验证了计算格式的正确性。将此本构模型应用于一大型地下洞室群的开挖围岩稳定分析中,得到的塑性区、位移场、应力场分布与Mohr-Coulomb准则计算结果分布规律相符,进一步验证了模型的适用性和可靠性。

基于三维模型的输变电运维业务应用开发及实践

三维模型可拓展信息记录与展示的维度,极具应用潜力,已在电力规划、建设、运维等多个环节初步发挥作用。如何更好地应用三维模型,成为行业关注的热点和难点。该文首先梳理总结三维模型在输变电运维场景的传统典型应用,然后从时、空2个维度剖析当下三维模型应用开发不足及与数字孪生技术融合的价值潜力,提出数字孪生三维模型应用路径,最后结合场景给出若干新应用开发建议。研究成果可为明晰三维模型的应用开发提供参考。

AI技术在药物研发中的应用

药物的研发不仅在于其对人类健康的保障,更在于其对科技、经济全面发展的推动作用,然而新药物的研发时间漫长且成本高,急需新技术的出现。人工智能(AI)技术的发展,为高效低成本的药物研发带来了希望。本文从多重药理学,药物设计,药物筛选,药物再利用四个方面阐述AI技术在药物研发中的应用。

基于Moodle的翻转课堂在《Android应用软件开发》中的实践研究

本文介绍了翻转课堂的概念和本质、翻转课堂的理论基础和支撑平台的特点及功能;在教学分析的基础上,对基于Moodle的翻转课堂教学模式的构建、设计和完善过程进行了详细的阐述;以《Android应用软件开发》课程为依据,进行了基于Moodle的翻转课堂教学的实践。

大语言模型在教学中的应用研究情况与未来发展

大语言模型作为一种重要的自然语言处理技术,能够被广泛应用于课程教学中。在综述大语言模型应用于个性化课程推荐、自适应教学、智能辅助学习、学习效果评估、实践教学以及课程资源建设等方面现状的基础上,以“舰船综合保障设计”课程教学为例,设计实现针对专业领域知识库的对话式问答系统,并对大语言模型的未来研究方向进行分析展望。通过实践证明,大语言模型在课程教学中的应用具有广泛前景和重要意义,可极大地提高教育教学质量和学生学习效率。

一种面向在轨服务卫星地面应用系统的软件开发方法

为解决现有在轨服务卫星地面应用系统瀑布式软件开发模型灵活性差,难以适应用户需求变化等不足,通过利用敏捷开发模型的思路,设计了一种迭代式在轨服务卫星地面应用系统软件开发方法,将用户纳入到软件开发过程中,在各个研制阶段持续与用户进行需求迭代,完成业务软件的功能升级。结果表明:该方法可提升业务软件功能与用户需求的匹配程度,并为后续在轨服务卫星地面应用系统的建设提供参考。

机械设计与制造中数字化建模方法分析

该文综合分析了数字化建模方法的关键特点和应用领域,探究数字化建模技术在机械设计与制造中的应用优势,系统阐述了该技术在机械设计与制造中的应用原理与加工过程,并总结目前数字化建模技术在机械设计与制造中的局限条件,提出未来进一步的研究重点与发展方向,通过不断优化算法,进一步增强数据准确性,提高数字化建模技术的应用效率,研究结果旨在为进一步推动数字化建模技术在机械设计与制造中的创新与应用提供参考和指导。

混凝土离散元本构模型二次开发研究

基于连续介质理论建立混凝土断裂损伤本构关系已较为成熟,但离散元法由于可以有效解决颗粒材料的运动和非连续性问题,分析混凝土开裂错动具有更好的优势。基于传统的混凝土内聚力双线性模型,将混凝土结构面上的作用力分解为法向的张拉力和切向的剪切力,引入法向和切向刚度系数,定义损伤因子修正本构模型,建立弹性阶段及损伤软化阶段的应力应变关系,并对离散元软件进行二次开发,编写模型DLL文件导入本构模型,通过与典型的试验曲线对比,验证了本构模型以及程序编写的正确性和有效性。

建筑工程管理中创新模式的应用及发展分析

我国建筑行业中的施工企业多具有规模较小,但所承接的项目却复杂烦琐的特点,导致工程项目质量无法得到有效保障,在深入行业发展的研究中发现,工程方管理水平较低等问题日趋严峻。因此,本文就当前建筑行业发展现状以及相关产业特点,对建筑工程管理创新方案展开研究,以期为建筑行业发展提供参考依据和发展思路。

建筑工程管理中创新模式的应用以及发展分析

随着建筑行业规模的扩大,建筑企业之间的竞争越来越激烈,建筑企业为了能够提高自身的实力,应该更加注重建筑工程的管理工作,并且对建筑管理当中存在的弊端进行优化,在现代化的建筑工程管理当中,应该对于传统的管理模式进行创新,才能适应建筑行业的发展要求,对于管理当中的各个环节和内容都要做到全面严格的管理。基于此,本篇文章针对建筑工程管理模式创新的重要意义进行了说明,并阐述了建筑工程管理当中创新模式的应用策略,分析了建筑工程管理中创新模式的发展趋势。