差動カム式非接触ねじりトルク・動力計の研究

conference pape

以階層式綜合預測蛋白質磷酸化位置

[[abstract]]目前已經開發了許多的磷酸化預測網站來預測磷酸化位置，但卻沒有任何一個預測網站能在任何情況下，性能皆能夠勝於其他預測網站。 綜合預測策略，是由Wan 等人的團隊所提出一個預測方法，此策略為整合許多預測磷酸化位置網站的預測結果。他們的綜合預測策略效能取得相當不錯的結果，且在大多情況下效能皆優於各基礎預測網站。他們執行一個廣義的權重投票策略藉由限制格點搜尋來產生綜合預測程式。但是，限制格點分析因為使用組合分析法，導致其有著大量的參數組合，若隨著樣本或是參數的增加，運算量會呈指數成長，非常耗時。 在本論文中，我們使用了乘性權重更新演算法及階層式綜合預測來學習綜合預測較好的參數，並且以此為基礎，嘗試刪除性能較差的預測網站，以取得更好的效能參數。 實驗結果顯示我們的綜合預測性能超過了KinasePhos, KinasePhos 2.0, PPSP, GPS3.0,在 S/T 位置在四個激酶,PKA,PKC,CDK,CK2 上的預測正確率。 There are numerous predictors have been developed to the phosphorylation sites prediction. However, there are no developed prediction programs that could make more accurate prediction than other prediction programs in every situation.Meta-prediction strategies. It is a phosphorylation sites prediction method proposed by Wan et al's team. The method integrate results of several prediction tools for phosphorylation sites prediction. Their meta-predictor gained an outstanding prediction performance that surpasses that of all combined prediction programs. They performed a generalized weighted voting strategy with parameters determined by restricted grid search to produce meta-prediction programs. Unfortunately, restricted grid search is time-consuming and the values of restricted grids should be computed using combinatorial analysis. In this paper, we make use of multiplicative update algorithms and hierarchical meta-prediction to learn better parameters for meta-predictions. Remove several prediction tools of bad performance. To get better performance parameters. The experimental results show that the hierarchical meta-prediction performs better KinasePhos, KinasePhos 2.0, PPSP, GPS3.0 for S/T kinase families, PKA, PKC, CDK, CK2

用双流体颗粒-壁面碰撞模型模拟混合层流动

将考虑壁面粗糙度的双流体颗粒-壁面碰撞模型加入到二阶矩两相湍流模型中,模拟了平面混合层两相流动.结果表明,考虑壁面粗糙度的模型的模拟结果与不考虑的结果相比,给出的纵向平均速度更小、纵向脉动速度更大,与实验值更接近.对于大颗粒,这种影响尤其明显.这些趋势与颗粒轨道模型的模拟结果定性上一致.这表明,窄通道内大颗粒和壁面的碰撞对颗粒流动特性有更显著的影响

壁面粗糙度对水平后台阶气粒两相流动影响的PDPA实验研究

用相位多普勒颗粒测速仪(PDPA)测量了颗粒的平均与脉动速度,研究了壁面粗糙度对水平后台阶气粒两相流动的影响.研究结果表明,壁面粗糙度减小颗粒纵向平均速度,增大颗粒纵向和横向脉动速度.壁面粗糙度对流场中不同位置处颗粒运动影响的强弱不同,其中逆流区处较弱,下游处较强.壁面粗糙度对不同粒径颗粒运动影响的强弱不同,其中对细颗粒的影响较弱且被局限在壁面附近;对粗颗粒的影响较强且扩散到整个流场

Fabrication of Nanowire Array by Metal-Assisted Etching and application on N-type Rear-Emitter Silicon Solar Cell

在太陽能電池製作過程中，影響效率的主要因素有短路電流(Short-Circuit)損失、 開路電壓(Open-Circuit Voltage)損失及填充因子(Fill Factor)損失。其中主要影響電流的方面來自表面反射、電極遮蔽以及材料本身對於太陽光的吸收能力。抗反射層 (Anti-Reflection Coating)以及表面結構化(Surface Texturing)可以降低表面反射與提高光電流進而提高效率。 其中次微米表面結構化技術相較於傳統的抗反射層具有優越的寬頻譜抗反射能力， 有充分的潛力取代傳統的抗反射鍍膜。N 型結晶矽因其較高的少數載子壽命與金屬雜 質容忍能力，被認為是相當有潛力的太陽能電池材料。 本論文嘗試結合兩者利用銀離子於N 型矽晶片表面進行奈米線陣列的製作，製作 完成的奈米線分別測量其表面狀態與反射率。製備好的奈米線直徑約70 奈米。將製備 好的奈米線陣列晶片製作成太陽能電池利用太陽光模擬器以及光譜響應測量系統測量 其IV 特性曲線與光譜響應並嘗試以快速熱氧化處理進行鈍化效果的比較。且利用不同 蝕刻時間的奈米線電池研究奈米線長度對於效率的影響，最後利用多晶矽製作奈米線 電池而最佳的轉換效率可達10％。In the process of solar cell fabrication, the factors of efficiency losses are Short-Circuit losses, Open-Circuit Voltage losses and Fill Factor losses. The Short-Circuit losses combined Reflection losses, Shading losses and absorption losses, Anti-Reflection Coating and Surface Texturing which can reduce the reflection losses to improve the efficiency. Compare with traditional Anti-Reflection Coating, Deep Sub-micron Surface Texturing has potential to replace the former due to its ability of Board-banded low reflectance. N-type crystalline silicon is recently attracted much attention due to higher minority carrier lifetime and toleration of metallic impurity. In this thesis, we fabricate the nanowire array on N-type silicon wafer through assisting of silver ions and analyze its morphology and reflectance. The diameter of nanowire is about 60nm. Finally, we fabricate the nanowire array solar cell and measure its IV character by Solar Simulator and Spectral response by Quantum Efficiency measurement device; we also discuss the effect of rapid thermo process for surface passivation and how different length effect on efficiency. Finally, we use multi-crystalline silicon to fabricate nanowire solar cell and reach the best efficiency to 10

堵塞和煤粉浓缩器对旋流两相流动影响的研究

旋流煤粉燃烧器加进口堵塞和煤粉浓缩器可以影响湍流,燃烧温度以及煤粉浓度的分布,从而影响NO的生成与排放。本文用三维相位多普勒颗粒测速仪(PDPA)测量和双流体模型数值模拟研究了堵塞和煤粉浓缩器对旋流煤粉燃烧器内两相流动的影响。实验结果和数值模拟结果基本符合。实验和模拟结果都表明,无论是进口堵塞还是煤粉浓缩器都会增加旋流燃烧器的进口湍流度,同时增加进口轴线附近的颗粒浓度,后者将有利于降低NO排放

甲烷再燃烧对突扩燃烧器中煤粉燃烧和NO生成影响的数值研究

再燃烧是降低煤粉燃烧器中NO生成的有效手段.本文用纯双流体模型,包括k-ε-kp两相湍流模型,EBU-Arrhenius燃烧模型,六热流辐射模型,NO生成湍流反应的AUSM模型,氮释放的简化Solomon模型等对燃烧器进口不同布风位置加入等量甲烷的再燃烧工程进行了数值模拟,讨论了再燃烧对于NO生成和排放的影响.本文部分模拟结果和实验数据进行了对比分析,验证了模拟结果的合理性.同时使用化学平衡软件对所讨论的工况进行了分析

有反应的双流体模型中两相流量守恒问题的研究

在单相流动CFD数值模拟中,对计算域出口进行流量守恒的修正是保证程序稳定和计算结果合理的有效手段。本文结合作者实际的模拟工作,探讨了在复杂的湍流两相流动,湍流两相反应流动中出口流量修正问题,给出了基于双流体模型的出流边界条件,为复杂反应流动的CFD模拟提供了有益的经验

Numerical investigation of flows around an axisymmetric body of revolution by using Reynolds-stress model based hybrid Reynolds-averaged Navier-Stokes/large eddy simulation

Flows around an axisymmetric body of revolution at a zero yaw angle were studied using a hybrid Reynolds-averaged Navier-Stokes (RANS)/large eddy simulation (LES) approach, which employed a full Reynolds stress model (RSM) in the RANS branch with the aim of accounting for the Reynolds stress anisotropy, streamline curvature, and flow separations in the boundary layer. The SUBOFF model without appendages was applied to conduct the simulations, and the Reynolds number based on the free-stream velocity and the length of the body is Re-L = 1.2 x 10(6). The results, including time-averaged C-p, C-f, and velocity statistics, were compared with the experimental data and wall-resolved LES results available in the literature, and the overall agreement of the comparisons was satisfactory. To assess the performance of the RSM-based hybrid RANS/LES approach, we carried out shear-stress transport-based hybrid RANS/LES approach simulations under identical free-stream conditions for comparison. The sensitivity of the hybrid RANS/LES approach to the RANS models was observed for separated flow with surface curvature and adverse pressure gradient-induced separation. The RSM-based hybrid RANS/LES approach was found to provide a better prediction for the unsteady flows near the stern. That is because the effects of the streamline curvature and the strong interactions between individual stresses can be captured by the exact production terms in the RSM-based hybrid RANS/LES approach. These effects are important for predicting the development of turbulent boundary layers along the stern. Published under an exclusive license by AIP Publishing