Results 21 to 30 of about 261,427 (159)
, 2001 企业经营追求价值最大化 ,价值评估对企业改进管理、提升价值有重要意义。较通行的两种评估模型是 :现金流量折现模型和经济利润模型 ,各有比较优势。企业价值评估必须通过对企业历史绩效进行分析 ,预测绩效 ,估计资金成本 ,进行连续价值预测 ...
沈维涛
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Making Policy Evidence Traceable: A Modular Preregistration Framework for Policy Evaluation
Policy Studies Journal, Volume 54, Issue 4, November 2026.ABSTRACT Preregistration is increasingly used in policy research, but its value depends on whether preregistered commitments can be clearly linked to reported analyses. Policy studies often involve multiple outcomes, evolving administrative data, consequential design and analytic choices, and adaptive implementation, making it difficult to distinguish ...
Yiyun Xia, Tianhao Zhao, Yuhao Ba
wiley +1 more source
增强CT淋巴结形态联合错配修复蛋白表达检测对结直肠癌区域淋巴结转移的评估作用
Zhongguo shiyan zhenduanxue, 2023 目的 分析增强电子计算机断层扫描(CT)淋巴结形态联合错配修复蛋白(MMR)表达检测对结直肠癌区域淋巴结转移的评估作用。方法 选取2019年8月-2021年8月收治的结直肠癌患者89例，均采取手术治疗，术前行增强CT扫描及病理穿刺检测病灶组织MMR表达情况。以术中结果为标准，评价增强CT淋巴结形态联合MMR表达检测对直肠癌区域淋巴结转移的评估价值。结果 淋巴结转移患者高分化和pT3-4期百分率与淋巴结未转移患者比较，差异有统计学意义 ...
严征远, 卜雪峰, 曹能琦, 张恒
doaj
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Lung cancer remains a major cause of cancer‐related mortality worldwide, and non‐small cell lung cancer (NSCLC) accounts for the largest proportion of diagnosed lung cancer cases. Exosomal programmed death‐ligand 1 (PD‐L1) has attracted increasing attention as a potential liquid‐biopsy biomarker associated with tumor immune regulation; however,
Chen Su +6 more
wiley +1 more source
, 2013 正确评估景区游憩价值是一个具有理论意义和实践价值的亟待解决的科学问题。多方案条件价值法(MPCVM)的理论基础是福利计量理论和要素价值理论,能够评估出各资源要素的游憩价值,其科学性和准确性优于仅能评估出整体价值的CVM。文章结合太姥山景区的实地问卷调查,在计量模型的比较研究基础上应用MPCVM评估景区旅游资源各要素的游憩价值,并进一步揭示各要素间的互补/替代关系。实证研究结果表明:受访游客的年龄、教育程度、月收入、认知度、满意度都与改善方案的选择概率呈显著正相关;旅游资源各要素间的游憩价值差异较大 ...
周春波, 林璧属
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Zhongshan Daxue xuebao. Yixue kexue ban, 2006 【目的】界定颈动脉内中膜厚度及其斑块分级在估测冠心病中的最佳预测值。【方法】用高频超声检测125例患者颈总动脉内中膜厚度、颈动脉分叉处内中膜厚度，以及颈动脉斑块分级，评价它们估测冠心病的作用，并用ROC曲线评价它们的诊断价值。【结果】冠心病组颈总动脉及分叉处内中膜增厚、斑块分级高，与对照组比较差异有统计学意义，P〈0．05；ROC分析显示颈总动脉及分叉处内中膜增厚、斑块分级均可估测冠心病，其曲线下面积分别为0．70、0．75、0．74；将颈总动脉分叉处内中膜增厚≥1．3mm，颈总动脉内中膜增厚≥0 ...
刘东红 +5 more
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Zhongguo shiyan zhenduanxue, 2021 随着对复发性流产的进一步认识,男性精子质量的重视度也逐渐增加,传统精液常规检测有一定的评估价值,但已不能完全评价男性精子质量[1]。现新兴的精子质量评估包括:蛋白质组学[2]、DNA甲基化[3]、凋亡标志物体[4]等。但因其检测技术复杂且昂贵,并未纳入临床检查,现精子DNA碎片化指数(DFI)检测技术越来越受重视,已成为精子质量评估的新标准[5]。另,精索静脉曲张在复发流产影响因素中的研究也越来越重要[6]。
李光, 吴艳楠, 张译夫, 文陶非
doaj
Assessing and strengthening community‐based coastal governance
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract Community‐based coastal governance is essential for biodiversity conservation and sustainable livelihoods, yet many communities continue to face significant challenges in establishing and sustaining effective governance systems. We sought to improve understanding of the current status of community‐based coastal governance across five countries
Mark Andrachuk +21 more
wiley +1 more source
Modeling seed germination data to meet biodiversity conservation needs in the Mediterranean
Conservation Biology, Volume 40, Issue 5, October 2026.Workflow to assess the availability and quality of germination data and assign species' thermal risk in the Mediterranean. (a) Assessment of data availability, including the phylogenetic distribution of the number of records (i.e. available germination data); (b) data quality assessment; and (c) assignment of climate risk categories for species that ...
Diana María Cruz‐Tejada +2 more
wiley +1 more source
Clinical significance of estimating fetus weight for diagnosing giant infants
Huli yanjiu, 2005 [目的]评价测量估算胎儿体重对诊断巨大儿的临床价值。[方法]以回顾性诊断试验评价为研究方式,采用产前胎儿体重估算和新生儿出生后测重,对120例疑似巨大儿者以出生后测重做为金标准,统计数据列入四格表计算。[结果]在107例巨大儿中,103例与产前测量估算相符合,灵敏度96.1%、特异度92.2%、准确度95.8%、阳性预告值99.0%。[结论]测量估算胎儿体重诊断巨大儿的方法简单、经济、快速、可靠。
党云芳
doaj