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磁共振(MR)是一种被广泛使用的医学成像方式。针对某些序列的 MR 影像不易直接获得、需要由其他序列的MR影像转换的问题,提出一种基于细节增强的MR序列转换方法。该方法基于条件生成对抗网络构建了残差模板合成模块 ResGAN和细节增强合成模块 EnGAN,设计了一种端到端的网络结构。在一组配准过的神经纤维瘤T1序列影像和STIR序列影像上进行了测试,结果表明,相比于现有方法,提出的方法更好地还原了边界细节和信号强度细节。
严凡, 邸奕宁, 张建伟, 陈为
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高温射流流场计算是尾焰辐射目标特性计算的前提,然而由于缺少可靠实验数据,针对湍流超声速射流的数值模拟多集中于低温射流,高温射流计算与实验的对比工作还很少见。本文利用k-ωSST双方程湍流模型,模拟了多个典型超声速射流实验的流场速度与温度分布,通过与实验结果进行对比,建立了一种超声速射流计算方法。首先,通过对比多个低温射流的实验与计算结果,探索了湍流模型中可压缩修正以及来流湍动粘性比对超声速射流计算结果的影响;进而,针对火箭发动机尾焰实验,计算尾焰流场与流场红外辐射 ...
万田, 丛彬彬, 樊菁
core +1 more source
Abstract In response to demand for better biodiversity stewardship from the private sector, frameworks such as the Taskforce on Nature‐related Financial Disclosures (TNFD) have been developed to help companies assess, manage, and disclose their nature‐related impacts, dependencies, risks, and opportunities.
Takuya Nomura +3 more
wiley +1 more source
Accountability in Government Use of AI: Citizen Concerns and Preferences
ABSTRACT Government adoption of AI opens the “pandora's box” of accountability, a core aspect of public value. Despite the centrality of governmental AI accountability, citizens' concerns and preferences in holding governments accountable for AI usage remain poorly understood.
Naikang Feng, Yanto Chandra
wiley +1 more source
ABSTRACT As the public sector increasingly adopts AI‐powered automated decision systems (ADS), understanding how citizens experience and value ADS use in public decision‐making is both normatively and practically important. Therefore, we examine and compare the effects of seven attributes of public values on citizens' support for ADS adoption in two ...
Guimin Zheng +4 more
wiley +1 more source
ABSTRACT The separation of light olefins is a crucial process in the petrochemical industry, and developing advanced adsorbent materials is very significant. Aluminum (Al) cluster‐based heterometallic frameworks possess great application prospects but have rarely been investigated for separation applications.
Song‐Yan Sui +4 more
wiley +1 more source
Resource Substitution: Local Governments' Issue Attention and Policy Reinvention
ABSTRACT Research on policy reinvention, where a government modifies rather than replicates policy innovations introduced by other governments, has progressed significantly, but how it is influenced by the government's issue attention has not been thoroughly examined.
Yingxin Zhang, Yixue Yao, Kaifeng Yang
wiley +1 more source
ABSTRACT Developing rapid, precise gas sensors for Listeria monocytogenes (LM) biomarker detection faces challenges due to suboptimal gas‐solid interactions. Herein, we report the rational synthesis of amino‐functionalized mesoporous SiO2 hollow nano‐doughnuts (MS‐2‐NH2‐2) via modification with (3‐aminopropyl) trimethoxysilane (AAPTMS), which enables ...
Xingyu Wang +7 more
wiley +1 more source
轨道交通工业控制系统是国家重要的基础设施之一。随着信息技术的迅速发展和网络形势的逐渐严峻,轨道交通工业控制系统信息安全受到了越来越多的关注。分析了轨道交通工业控制系统的系统组成,总结了轨道交通工业控制系统面临的安全威胁种类,举例剖析了轨道交通工业控制系统信息安全风险演化,并进一步对轨道交通工业控制系统信息安全威胁趋势进行了解析。最后,给出了轨道交通工业控制系统信息安全技术的发展建议。
李浥东 +5 more
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