The arrangement of natural and physical features on the earth’s surface are a few among the countless items that govern the airborne acoustic transmission at boundary layers.In particular,if the acoustic waves are at...The arrangement of natural and physical features on the earth’s surface are a few among the countless items that govern the airborne acoustic transmission at boundary layers.In particular,if the acoustic waves are attributes of live concerts at open-air theatres,without losing the sheen and quality,the audience should certainly receive the unbroken depth of the performance.Hence,at all times,it is advisable to analyse the auditory receptiveness,particularly in all intended recreational spaces.The current pandemic circumstances and the mandated COVID-19 prevention protocols encourage gatherings in naturally ventilated outdoor regions than confined indoors.This work predicts and quantifies the acoustic experience at the naturally carved amphitheatre at SAINTGITS,an autonomous institution at the down South-West of the Indian Subcontinent.The entire recreational space at SAINTGITS AMPHI was separately modelled as a Base case and Advanced case,and were analysed using the acoustic modelling module of EASE Focus,a renowned simulation freeware,which is in strict adherence with the International standards.The variation in loudness received at the nearest and farthest ends of the amphitheatre was between 67 to 80 dB.Though the Zero frequency SPL(Z-weighting)exhibited the loudness in the range of 81 to 85 dB and could maintain a safer auditory level for any human ear,it was confined to a hemispherical region near the sound source.A vertical beam angle of−4.0°was found to be effective throughout.The procedures and analyses will certainly help the future organizers and stakeholders to effectively plan the resources to reap rich acoustic experience at terrain-centric locales.The surface topography and contours were plotted with another set of freeware,the CADMAPPER and the QUIKGRID,to compare terrain gradient with the known data.Furthermore,this interdisciplinary research exhibits the extensive simulation capability of both EASE Focus and QUIKGRID and demonstrates the modelling versatility and deliverable potential of these freeware to benefit the budding architects and researchers.展开更多
目的确定土鳖虫水溶性蛋白质提取最佳工艺条件。方法在单因素实验基础上,以土鳖虫蛋白质提取率(Y)为响应值,应用响应面法对土鳖虫蛋白质提取工艺进行优化。结果依据统计模型发现液料比、提取时间、提取液p H 3个要素均对土鳖虫蛋白质提...目的确定土鳖虫水溶性蛋白质提取最佳工艺条件。方法在单因素实验基础上,以土鳖虫蛋白质提取率(Y)为响应值,应用响应面法对土鳖虫蛋白质提取工艺进行优化。结果依据统计模型发现液料比、提取时间、提取液p H 3个要素均对土鳖虫蛋白质提取率影响明显。由响应面三维图及等值图分析,得到土鳖虫蛋白质提取率较高的最佳方案为液料比40:1,提取时间20 min,提取液p H 9。结论验证实验所得蛋白质提取率为11.06%,与模型预测值十分接近,运用响应面法优化土鳖虫蛋白质提取条件切实可行。展开更多
基金This research is funded and supported by the Centre for Engineering Research and Development under the Research Seed Money scheme(CERD-RSM 2018 No.ME02 KTU/Research 2/3894/2018)of APJ Abdul Kalam Technological University,Thiruvanathapuram,Kerala State,India.
文摘The arrangement of natural and physical features on the earth’s surface are a few among the countless items that govern the airborne acoustic transmission at boundary layers.In particular,if the acoustic waves are attributes of live concerts at open-air theatres,without losing the sheen and quality,the audience should certainly receive the unbroken depth of the performance.Hence,at all times,it is advisable to analyse the auditory receptiveness,particularly in all intended recreational spaces.The current pandemic circumstances and the mandated COVID-19 prevention protocols encourage gatherings in naturally ventilated outdoor regions than confined indoors.This work predicts and quantifies the acoustic experience at the naturally carved amphitheatre at SAINTGITS,an autonomous institution at the down South-West of the Indian Subcontinent.The entire recreational space at SAINTGITS AMPHI was separately modelled as a Base case and Advanced case,and were analysed using the acoustic modelling module of EASE Focus,a renowned simulation freeware,which is in strict adherence with the International standards.The variation in loudness received at the nearest and farthest ends of the amphitheatre was between 67 to 80 dB.Though the Zero frequency SPL(Z-weighting)exhibited the loudness in the range of 81 to 85 dB and could maintain a safer auditory level for any human ear,it was confined to a hemispherical region near the sound source.A vertical beam angle of−4.0°was found to be effective throughout.The procedures and analyses will certainly help the future organizers and stakeholders to effectively plan the resources to reap rich acoustic experience at terrain-centric locales.The surface topography and contours were plotted with another set of freeware,the CADMAPPER and the QUIKGRID,to compare terrain gradient with the known data.Furthermore,this interdisciplinary research exhibits the extensive simulation capability of both EASE Focus and QUIKGRID and demonstrates the modelling versatility and deliverable potential of these freeware to benefit the budding architects and researchers.
文摘目的确定土鳖虫水溶性蛋白质提取最佳工艺条件。方法在单因素实验基础上,以土鳖虫蛋白质提取率(Y)为响应值,应用响应面法对土鳖虫蛋白质提取工艺进行优化。结果依据统计模型发现液料比、提取时间、提取液p H 3个要素均对土鳖虫蛋白质提取率影响明显。由响应面三维图及等值图分析,得到土鳖虫蛋白质提取率较高的最佳方案为液料比40:1,提取时间20 min,提取液p H 9。结论验证实验所得蛋白质提取率为11.06%,与模型预测值十分接近,运用响应面法优化土鳖虫蛋白质提取条件切实可行。
