نتایج جستجو برای: شبکه عصبیطبقهبندی موضوعی c52 g11 g14
تعداد نتایج: 45264 فیلتر نتایج به سال:
In order to elucidate the molecular mechanism of the catalytic reaction and enzyme conformation, we substituted 53 conserved residues identified by aligning 92 p-hydroxybenzoate hydroxylase sequences and 19 non-conserved residues selected from crystallographic studies of Pseudomonas fluorescens NBRC14160 p-hydroxybenzoate hydroxylase with 19 other naturally occurring amino acids, yielding a dat...
This study examines the link between earnings announcement premia (i.e., higher returns in announcement periods) and changes in liquidity prior to the announcements. Motivated by prior research, we model market makers as holding positive inventories and show they asymmetrically raise costs of providing liquidity to sellers, relative to buyers, to reduce inventory risks ahead of earnings news. T...
This study examines how accounting has informed private equity diversification claims and demand for private equity investments. Despite research showing private equity lacks portfolio diversification benefits, those marketing private equity assets continue to emphasize its diversification value, and demand for private equity investments has surged. Exploiting the change in international accoun...
China’s pension system is facing a large gap of more than one trillion RMB. The investment efficiency of the social security fund therefore receives widespread attention in academic circles. We collected data of stocks held by the Chinese National Council for Social Security Fund (CNCSSF) from 2004 to 2012 to research the stocks’ investment efficiency, distinguishing between direct investment b...
Many research showed a high degree of correlation between the US and European capital markets, partly due to industrial‒financial linkages of the United States and Europe, and partly due to the influence of psychological factors on the behavior of individuals, and the concept of behavioral finance. However, it can be assumed that the movement of the value of an observed index does not depend so...
بسیاری از سرمایهگذاران بدنبال معیاری برای مقایسه سهام با یکدیگر و انتخاب بهترینها هستند که در این راستا معیارهای از قبیل PE , PEG و PERG معرفی شدهاند. در این تحقیق دو معیار جدید جهت مقایسه سهام بایکدیگر به نامهای PEKG و PEDKG معرفی و مورد بررسی قرار گرفته است. معیارهای ذکر شده (P/E, PEG, PERG, PEKG, PEDKG) برای تمامی شرکتها (نمونه آماری تحقیق) محاسبه، سپس شرکتها بر اساس هر کدام از این ...
نحوه انتخاب سهام در بورس اوراق بهادار، یکی از مهمترین مسائل سرمایهگذاران در اینگونه بازارهاست. دستیابی به شیوههایی که بتواند سرمایهگذاران را در انتخاب سهام در این بازارها یاری نماید، اهمیت بسزایی دارد. یکی از مشکلات سرمایهگذاران، انتخاب معیار صحیح برای مقایسه انواع سهام است. تحقیق حاضر با استفاده از روشهای تصمیمگیری چند شاخصهای (SAW,TOPSIS,ELECTR) به بررسی معیارهای موثر بر انتخاب سهام...
Metabotropic receptors coupled to Gq/G11 family G proteins critically contribute to nervous system functions by modulating synaptic transmission, often facilitating excitation. We investigated the role of Gq/G11 family G proteins in the regulation of neuronal excitability in mice that selectively lack the alpha-subunits of Gq and G11, G alpha q and G alpha 11, respectively, in forebrain princip...
Existing studies show that intra-firm variation in earnings announcement speeds correlates with earnings news, such that firms are more likely to decrease (increase) the speed of announcing bad (good) earnings news relative to their fiscal period end. We examine firms’ “expected abnormal reporting speeds” not just in relation to their own past behaviors, but also in relation to other firms anno...
We show the financial press is more likely to cover firms with deteriorating performance. Specifically, we show greater media coverage foreshadows declines in firms’ profitability and negative earnings surprises. Similarly, we find the media is more likely to cover firms’ earnings announcements if they convey poor operating performance, suggesting the media tilts its selection process toward ne...
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