نتایج جستجو برای: artificial spring
تعداد نتایج: 338810 فیلتر نتایج به سال:
Creep performance of zinc borate-treated strandboard from southern pine (Pinus taeda L.) and red oak (Quercus falcata) was investigated at 25°C temperature and 65% relative humidity. It was shown that the borate treatment had some signifi cant effect on creep defl ection of the test panels, and the effect varied with wood species. There was no signifi cant effect of creep loading on residual be...
In the framework of Geoland, Infoterra France has mapped with MERIS the distribution of annual crops surfaces in Belgium, Poland and Russia (Rostov oblast). The maps provided are the acreages of main groups of crops per administrative or agricultural circumscriptions unit. The groups are winter, spring and root crops (sugar beet, potatoes). The method for mapping exploits the MERIS capability t...
هدف از این مطالعه، شناسایی عوامل حائز اهمیت در رفتار لرزه ای پل های قوسی فولادی با عرشه بالاگذر، تحت تاثیر آثار مولفه قائم برای حیطه ای از تغییرات پارامترها و حالاتی ایده آل سازی شده از ویژگیهای توپوگرافیک دره های زیر پل با فرض خاک نوع i (مطابق آیین نامه 2800) می باشد. همچنین سعی شده است با تحلیل دینامیکی دو بعدی ، ارزیابی رفتار لرزه ای پل قوسی خرپایی ومقایسه نتایج با در نظر گرفتن نسبت خیز به د...
today there are different vibration isolators used in industries according to the weight and excitation frequency of the machines which have vibration. one of them is air spring which is in two types: convoluted air spring and membrane air spring. convoluted air springs are used to control vibrations in low frequency (usually lower than 10 hz) and the membrane ones are used in high frequency (u...
In the current climate change scenario, natural spring in region is drying or vanishing, increasing water scarcity. So, to protect this vital resource, rejuvenation and protection activities are needed. Thus, potential zones (SPZ) must be identified execute project successfully. The study used remote sensing (RS) geographical information system (GIS) techniques determine an SPZ based on multicr...
While the evidence for advancement of spring phenology of animals and plants in response to recent climate change is overwhelming and undisputed, formal meta-analyses of avian migratory phenologies in response to climate change have not been conducted. Likewise, attempts to evaluate the relative roles of phenotypic plasticity versus evolutionary responses of observed advances in arrival times h...
In a cooling gas of rigid particles interacting with a constant coefficient of restitution, groups of particles within the gas may experience an infinite number of collisions in a finite time. This singularity, named inelastic collapse, is a shortcoming of the mathematical model, and it hampers the efforts of simulating a freely evolving, cooling granular system. After a brief review of previou...
In today's world with companies operating in a global business environment. Most enterprises, and especially the SMEs, lack the necessary business culture, technical and non-technical infrastructure and economic flexibility in order to efficiently adjust to the environment of a B2B integration framework. This paper proposes an Enterprise Integration Assessment Framework (EIAF) and its support s...
The scarf framework as presented [2] offers the basic equations for training SCRFs. We propose to extend the framework with Empirical Bayes Risk training or Empirical Training Error optimization, which are better correlated with the error metric one seeks to optimize, than the conditional log-likelihood normally used. Second, SCRFs are (marginalized) exponential models over segmented sequences....
The selection and adoption of open source ERP projects can significantly impact the competitiveness of organizations. Small and Medium Enterprises have to deal with major difficulties due to the limited resources available for performing the selection process. This paper proposes a framework for evaluating the quality of Open Source ERP systems. The framework is obtained through a specializatio...
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