And preliminary modeling analyzes reaction process using ignition-growth model . but the results are not satisfied due to the complexity of real ignition mechanisms 但由于實(shí)際問題的復(fù)雜性,計(jì)算模型的適用性和參數(shù)的選取還有待于進(jìn)一步研究。
3 . to explain concentration-dependent crystal growth mechanism of gold or silver nanoparticles with different size and shape respectively, we propose two preliminary models 提出有關(guān)納米粒子的生長模型,分別解釋金和銀兩種金屬由還原劑濃度控制粒子生長的生長機(jī)理。
Group leader : responsible for coordination of group works, design and completion of the preliminary model, finical management, group photography, group purchase, manufacture, cable arrangements, writing the final report 組長:負(fù)責(zé)小組工作協(xié)調(diào)、初步模型設(shè)計(jì)與制作、財(cái)務(wù)管理、小組攝影、小組采購、現(xiàn)場加工、配線、書面報(bào)告之設(shè)計(jì)篇撰文。
A preliminary model experiment has also been conducted on the near-wall-interference of torpedo-type platform at different inflow speed . the test results agree with the computational results in general . the discrepancy is believed to be due to the complexity in real fluid domain and needs farther research 給出的試驗(yàn)結(jié)果與計(jì)算值在規(guī)律上基本相同,數(shù)值上的差別被認(rèn)為是由理論模型忽略粘性和實(shí)際流場的復(fù)雜性引起的,需要進(jìn)一步研究。
In this paper, ansys, the software on finite element analysis, is made use of processing the static and modal analysis on the preliminary models and its " modified ones . by analyzing the results, we can conclude that the stresses on the components of the modified models are tended to equilibration and the location of the branches " brace can also influence stresses and translations on the branches . in addition, the values of the intrinsic frequencies on modified models " are larger than the ones on preliminary models, but the ranges of the frequencies on both models are almost same 傳統(tǒng)的弧形閘門的支臂結(jié)構(gòu)基本上都是三角架式的,這主要是因?yàn)榘雌矫骟w系進(jìn)行計(jì)算的傳統(tǒng)設(shè)計(jì)方法忽略了結(jié)構(gòu)的整體性及弧形閘門的空間結(jié)構(gòu)特點(diǎn),設(shè)計(jì)得比較保守,而實(shí)際上,將其改為a型結(jié)構(gòu)也存在可行性,本文是利用有限元分析軟件??ansys對(duì)原模型及修改模型分別進(jìn)行靜態(tài)和固有頻率的計(jì)算,通過分析比較其結(jié)果可知,支臂改為a型后會(huì)使閘門的整體受力趨于均勻,即原模型受力大的部件其應(yīng)力變小,而原模型受力小的部件其應(yīng)力會(huì)變大;而且a型支臂的支桿在不同的放置位置對(duì)支臂的應(yīng)力和位移變化也有一定的影響。
In this paper, ansys, the software on finite element analysis, is made use of processing the static and modal analysis on the preliminary models and its " modified ones . by analyzing the results, we can conclude that the stresses on the components of the modified models are tended to equilibration and the location of the branches " brace can also influence stresses and translations on the branches . in addition, the values of the intrinsic frequencies on modified models " are larger than the ones on preliminary models, but the ranges of the frequencies on both models are almost same 傳統(tǒng)的弧形閘門的支臂結(jié)構(gòu)基本上都是三角架式的,這主要是因?yàn)榘雌矫骟w系進(jìn)行計(jì)算的傳統(tǒng)設(shè)計(jì)方法忽略了結(jié)構(gòu)的整體性及弧形閘門的空間結(jié)構(gòu)特點(diǎn),設(shè)計(jì)得比較保守,而實(shí)際上,將其改為a型結(jié)構(gòu)也存在可行性,本文是利用有限元分析軟件??ansys對(duì)原模型及修改模型分別進(jìn)行靜態(tài)和固有頻率的計(jì)算,通過分析比較其結(jié)果可知,支臂改為a型后會(huì)使閘門的整體受力趨于均勻,即原模型受力大的部件其應(yīng)力變小,而原模型受力小的部件其應(yīng)力會(huì)變大;而且a型支臂的支桿在不同的放置位置對(duì)支臂的應(yīng)力和位移變化也有一定的影響。
This article attempts to expand the scope of the theory of clusters by applying the theory to the development of regional economic clusters, and to explain regionalism through an in depth, up to date approach . it also set up a preliminary model of reverse pyramid by using the clusters theories in the research of regional economy development 鑒于此,本文試圖進(jìn)一步拓展集群理論的研究范圍,在產(chǎn)業(yè)集群理論的基礎(chǔ)上提出“區(qū)域經(jīng)濟(jì)集群”的概念,并對(duì)區(qū)域經(jīng)濟(jì)集群的范疇和機(jī)理作了比較深入的分析,初步建立起區(qū)域經(jīng)濟(jì)集群研究的“倒金字塔”模型,將集群理論應(yīng)用到區(qū)域經(jīng)濟(jì)發(fā)展的研究之中。