In this study, the temperature distribution, species transfer, and solidification behavior in round billet continuous casting with mold electromagnetic stirring (M-EMS) was numerically investigated. The joule heat induced by M-EMS liquid fraction profiles mushy zone were observed, whereby it found that increasing current intensity caused further increase force, which reduced impact depth of steel while accelerating dissipation superheat. high at exit secondary cooling 68.1% (case 1) 77.1%...

Abstract The present study proposed a systematic impregnation test, to the impact of interaction film and impregnating agent on microstructure, as well electrical properties biaxially oriented polypropylene (BOPP) films. BOPP films were impregnated in benzyl toluene at 80°C for 1, 3, 7, 14, 42 days respectively. microstructure different durations investigated. results showed that crystallinity first decreased then increased with time. came into during process, which suppressed orientation...

A visual deformation prediction method was proposed to improve the accuracy and visualization of surrounding rock in tunnel construction, combining Variational Modal Decomposition (VMD) Bidirectional Long- Short-Term Memory (BiLSTM) network. Based on VMD decompose measured data deformation, BiLSTM model used predict final value. The results were also embedded into tunnel’s Building Information Modeling (BIM) as plug-ins, visualized through graphs color warnings. Taking arch settlement...

A simple, efficient and environmentally friendly methodology for the halodecarboxylation of anisole analogues using Fe(NO3)3·9H2O/KBr or NaI at room temperature was developed. In this method, most substrates with an electron-donating group afforded corresponding products in good to excellent yields, whereas those electron-withdrawing low moderate yields. More importantly, protocol also applicable gram-scale synthesis. It is hoped that will be highly useful organic

In this paper, the characteristics of manganese sulphide in continuous casting bloom 38MnS6 steel were revealed. Manganese low oxygen (w(O) = 7 ppm) mainly exists form pure distributed along grain boundaries. The morphology changes from fine droplets/rods to dendrites with large size and aspect ratio gradually increases. thermodynamic calculation results show that precipitates at end solidification (fs 0.86), its is related local supersaturation extrusion solid-phase boundary. first...

Spot segregation and banded defect are unsolved technical problems of high-quality steel. In this paper, spot different sizes irregular morphology were found in equiaxed crystal zones slab. The characteristics speckle type porosity compared, where the degree large-size was worse. After heat treatment hot rolling processes, concentration changes carbon, manganese, iron obtained by EPMA SEM-EDS. results showed that carbon distribution became more even but change manganese not obvious, maximum...

程 瑶 1 , 王 铭 2 王星星 徐征丽 汪大林 祝迎春 (1.上海第二军医大学附属长海医院, 上海 200433; 2. 中国科学院 上海硅酸盐研究所, 中国科学院特种无机涂层 重点实验室, 200050) 摘 要: 羟基磷灰石因有良好的生物学活性被广泛应用于人工骨替代材料, 但纯羟基磷灰石存在的自身不足限制了 其临床应用范围。 人体硬组织中含有多种具有重要生化作用的微量元素, 本研究按照骨骼中微量元素含量对羟基磷 灰石进行掺杂改性, 制备出一种新型仿骨成分多元掺杂纳米结构羟基磷灰石材料(HA )。 通过碱性磷酸酶活性染色、 半定量 PCR 测量和茜素红染色等不同方法对比了未掺杂纳米结构羟基磷灰石(HA )和多元掺杂纳米结构羟基磷灰 石材料(HA )对小鼠成骨前体细胞(MC3T3-E1)增殖及分化的影响。碱性磷酸酶活性染色实验证明 HA 比 具有

Composition uniformity is essential to the quality, stability, and fatigue life of bearing materials. In current study, various calculations measurement methods are implemented obtain high‐temperature physical properties GCr15‐bearing steel. Combined with a validated transient heat transfer model, two cases different dynamic soft reduction (DSR) ranges amounts designed for industrial trials. The defects, carbon contents, carbides in bloom center contents microstructure rod compared. results...

Dynamic failure of rock masses around deep tunnels, such as fault-slip rockburst and seismic-induced collapse, can pose a significant threat to tunnel construction safety. One the most factors that control accuracy its risk assessment is estimation ground motion caused by seismicity events. In general, characteristic parameters are estimated in terms empirical scaling laws. However, these laws make it difficult accurately estimate near-field because roles factors, geometry, damage zone...

Introduction Young’s modulus and shear are essential mechanical parameters for evaluating subsurface rocks, playing a pivotal role in the exploration development of unconventional resources. indicates brittleness reservoir, while determines ease fracturing rock layers. Methods Traditional methods estimate these moduli through indirect calculations approximate expressions, which prone to cumulative errors rely on multiple assumptions, reducing inversion accuracy. This paper presents direct...

In burst-prone deep underground engineering, seismic waves generated from a near-field ground motion event may play critical role in causing localized rockburst damage. Accurate estimation of motions around excavations is important for hazard risk assessment and dynamic rock support design engineering. During the excavation an cavern, stress redistribution surrounding leads to formation damage zones, including zone (EDZ) fracture (EFZ). The poor properties zones cause wave velocities mass...

The goal of this study is to assess the application Hardening soil model in predicting deformation retaining walls excavations 2D and 3D finite element analysis at Ho Chi Minh Metro project. Designed as deepest underground station first metro line built City (HCMC), Opera House located an area with a dense building zone close historical buildings. A summary input properties provided using data from site investigations, in-situ tests, laboratory tests. By numerical simulation model,...

The objective of this study is to assess the impact utilizing a BW (Buttress wall) control deflection diaphragm wall in colluvial soil conditions Vietnam. physical and mechanical properties layers are evaluated using data closely monitored during specific project, serving as validation for 3D numerical simulations Hardening Soil Model. analysis results match field monitoring data, which has tested accuracy simulation model. This forms basis further investigations into dimensional parameters...

The healthcare industry, a key pillar of Chinas economy, has shown steady growth driven by expanding revenues and its critical role in national development. Globally, increasing demand prompted policies such as reforms health promotion programs, fostering growth. Simultaneously, innovations big data, AI, biotechnology have advanced precision medicine, telemedicine, drug However, rising competition, the proliferation SMEs, stricter regulatory standards, escalating costs pose significant...

Globalization has resulted in consolidation automotive industries. More and more alliances, mergers acquisitions are occurring cross national borders. There is no doubt that cultural differences innovation management might exist between combining firms their employees, which obstruct or promote innovation. Based on a case study project team, connection culture explored, the potential complementation of prevailing cross-cultural concept discussed.