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Search Results: 1 - 10 of 48806 matches for " 马含笑 "
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双细胞体系木糖协同发酵产氢特性研究
苏海佳,含笑,彭菲,汪廷枫,张婷
- , 2018, DOI: 10.13543/j.bhxbzr.2018.05.009
Abstract: 采用自主筛选的两株蜡样芽胞杆菌(A1)和短波单胞菌属(B1),构建人工双细胞体系,重点研究了该双细胞体系利用木糖协同发酵产氢的能力,实验结果表明:单一的A1、B1菌种均能有效利用木糖产氢,而两株菌形成的双细胞体系显示出更高的产氢效率,以及更加充分的底物利用率;发酵产氢过程属于丁酸型发酵。人工双细胞体系混合培养的产氢得率达到1 mol木糖产生1.33 mol氢气,与A1、B1单菌体系木糖发酵产氢相比,产氢得率分别提高了10.7%与32.7%,其原因可能是两菌种互相提供营养来源,也可能是通过利用对方的代谢产物或中间体解除了降解物造成的抑制。说明以木糖作为底物时,人工双细胞体系能有效提升产氢速率,增加氢气产量,缩短发酵周期,具有较大的应用潜力。
Abstract:An artificial bi-cell system has been constructed using Bacillus cereus (A1) and Brevibacterium sp. (B1). The synergistic fermentation of xylose to give hydrogen has been studied in this artificial bi-cell system. The experimental results showed that whereas the single A1 and B1 strains can effectively produce hydrogen with xylose as substrate, the artificial bi-cell system showed higher hydrogen yields and better substrate utilization. The main pathway of hydrogen production was shown to involve butyric acid fermentation. The yield of hydrogen production in the artificial bi-cell system was 1.33 mol H2/mol xylose. This is, respectively, 10.7% and 32.7% larger than the yields obtained by fermentation with the single A1 and B1 strains. The reason for the higher yield may be that the two strains provide nutrients for each other and use each other's metabolites or intermediates to mitigate the possible inhibition caused by by-products. The results show that the artificial bi-cell system has great potential for application in fermentation with xylose as substrate, since it can increase the hydrogen yield and the rate of hydrogen production, and thus shorten the fermentation cycle.
带稀疏约束的分裂可行问题的算法
The Solution of Sparsity-Constrained Split Feasibility Problem
 [PDF]

含笑, 孙军, 屈彪
Advances in Applied Mathematics (AAM) , 2016, DOI: 10.12677/AAM.2016.52034
Abstract: 本文,我们主要研究带稀疏约束的分裂可行问题。在某些合理的假设下用IHT算法,得到了带稀疏约束的分裂可行问题的稳定点及给出在局部收敛性分析中起到了重要作用的结论。
In this paper, we mainly study the solution of sparsity-constrained split feasibility problem. Under some reasonable assumptions, we use IHT algorithm to get the stationary points of sparsity- ?constrained split feasibility problem and get a conclusion which plays an important role in local convergence analysis.
转录因子FOXM1剪接异构体在乳腺癌EMT过程中的初步研究
谭拥军,含笑
- , 2015,
Abstract: 探究转录因子FOXM1不同的剪接异构体对乳腺癌EMT过程中的影响.采用基因工程方法分别构建了表达FOXM1B-EGFP和FOXM1C-EGFP两种 FOXM1剪接异构体真核表达质粒,并将其转染进乳腺癌细胞,采用RT-PCR和Western印迹检测细胞样本中FOXM1剪接异构体的表达和EMT相关基因表达,同时采用transwell检测高表达不同FOXM1剪接异构体细胞的侵袭和迁移能力.成功构建了FOXM1B-EGFP和FOXM1C-EGFP真核表达质粒.外源FOXM1B在乳腺癌间质型细胞的表达高于上皮型细胞,并主要存在于细胞核内,且高表达FOXM1B 能够显著促进乳腺癌细胞的侵袭和EMT过程.外源FOXM1C在乳腺癌上皮型细胞中的表达高于间质型细胞,并且在细胞核和细胞质中均有表达,高表达FOXM1C能够显著抑制细胞的侵袭和EMT过程.实验结果表明,在乳腺癌细胞中,FOXM1B主要存在于细胞核内,FOXM1C在细胞核和细胞质中均有表达.本研究预示FOXM1B和FOXM1C对乳腺癌细胞EMT过程发挥不同的影响.
To explore the impact of different transcription factor FOXM1 isoforms in breast cancer EMT process, the eukaryotic expression plasmids for two FOXM1 isoforms, FOXM1B-EGFP and FOXM1C-EGFP, were constructed and transfected into breast cancer cells. The expression levels of FOXM1 isoforms and EMT related genes in the cells were detected with RT-PCR and Western blot. The migration ability of the cells overexpressing the FOXM1 isoforms was measured with the transwell test. The FOXM1B-EGFP and FOXM1C-EGFP eukaryotic expression plasmids were successfully constructed. We found that the levels of exogenous FOXM1B in mesenchymal cells were higher than those in epithelial cells, and it was mainly located in the nucleus. The high levels of FOXM1B expression significantly stimulated the invasion of breast cancer cells and EMT process. The levels of exogenous FOXM1C in epithelial cells were higher than those in mesenchymal cells, and they were expressed in both the nucleus and the cytoplasm. The high levels of FOXM1C expression inhibited the invasion of breast cancer cells and EMT process. FOXM1B was located mainly in the nucleus of cells and FOXM1C was expressed in both the nucleus and the cytoplasm of cells. The research has indicated that FOXM1B and FOXM1C play different roles in the process of EMT of breast cancer cells.
燃煤电厂烟气超低排放技术路线的工程应用
Engineering Application of Flue Gas Ultra-Low Emission Technical Routes in Coal-Fired Power Plant
 [PDF]

袁建国, 周号, 郦建国,含笑
Advances in Energy and Power Engineering (AEPE) , 2016, DOI: 10.12677/AEPE.2016.44010
Abstract:
中国大气污染形势依旧严峻,燃煤电厂烟气排放政策愈加严格,市场需求更加迫切,针对这一现状,同时借鉴国外先进技术,为实现燃煤电厂烟气超低排放,可分别采用“以低低温电除尘技术为核心的烟气协同治理技术路线”或“湿式电除尘技术路线”,本文对该两条技术路线进行了简述,并从技术路线及设计要求、技术方案、投运效果等方面介绍了其典型案例,对两条路线的技术特点作了比较,提出了烟气超低排放技术存在的问题及建议。本文可为超低排放技术路线的选择及工程推广提供一定参考。
The atmospheric pollution situation in China is still serious. Flue gas emission policies are stricter and new technique is asked for market demand. In accordance with this present situation and to meet the requirement of flue gas ultra-low emission in Chinese coal-fired power plant, flue gas co-governance route with low-low temperature ESP technology as core task and WESP technical route could be used respectively. These two technical routes were described briefly. Typical cases from aspects of technical route, design requirement, technical proposal, operation effect and so on were introduced. Comparison of technical characteristics of two technical routes was conducted in this paper, and noteworthy problems and suggestions for flue gas ultra-low emission technical were pointed out. This paper could provide some reference for the selection of flue gas ultra-low emission technical routes and engineering promotion.


带1-范数约束的分裂可行问题的投影算法
PROJECTION ALGORITHMS FOR THE SOLUTION OF SPLIT FEASIBILITY PROBLEM WITH 1-NORM CONSTRAINTS

作者,含笑,屈彪
- , 2017,
Abstract: 本文主要研究带1-范数约束的分裂可行问题的求解算法.用一种交替投影算法,求得了问题的解,提出松弛交替投影算法,改进了直接往闭凸集上投影这一不足,并证明了该算法的收敛性.
In this paper, we mainly study the solution algorithm of the split feasibility problem subject to 1-norm constraints. By using the alternating projections algorithm, we solve the problem successfully and propose a relaxed alternating projections algorithm which improves the shortage of projecting directly onto the closed convex set. And we obtain the convergence of this algorithm
湍流场中颗粒破碎的数值模拟
含笑,姚宇平,郦建国
环境工程学报 , 2015,
Abstract: 在保证较好凝并的前提下最大限度地抑制颗粒破碎是湍流凝并技术的研究关键,通过CFD软件,选二维单扰流柱为研究对象,采用颗粒群平衡模型(PBM),通过UDF功能,分别将破碎核函数定义为常数、LaakkonenBreakageKernels模型、分段函数,模拟湍流场中颗粒的破碎规律,旨在摸索一种适用于工程应用的颗粒湍流破碎模型和计算方法,为相关实验研究和工程设计提供参考。
综述:载脂蛋白a-ⅰ在高密度脂蛋白生物合成中的作用研究进展
莫中成?,含笑,易光辉?
生物化学与生物物理进展 , 2015,
Abstract: 高密度脂蛋白(hdl)生物合成是一个有多种膜蛋白和胞质蛋白参与的复杂过程,载脂蛋白a-ⅰ(apoa-ⅰ)是hdl中最主要的结构和功能蛋白,它能活化卵磷脂胆固醇脂酰基转移酶(lcat),贫脂apoa-ⅰ也是巨噬细胞中三磷酸腺苷结合盒转运体a1(abca1)介导的胆固醇流出的重要接受体.因此,apoa-ⅰ在hdl及胆固醇代谢中的作用至关重要,它赋予了hdl多种抗动脉粥样硬化活性.本文主要就hdl生物合成及apoa-ⅰ在其中的作用作一综述,以期为揭示hdl的代谢机制提供新思路.
相同敏感值数据集的隐私保护泛化算法 A Generalized Algorithm of Privacy Protection on Same Sensitive Value Data
郑明辉,含笑,段洋洋
- , 2018,
Abstract: 针对相同敏感值的数据集,定义了其特有的隐私泄露方式,研究了该类数据在同质性攻击下的隐私泄露特点,提出了实例完全泄露风险的概念和计算方法,实现了相同敏感值条件下隐私泄露的准确度量.设计了两种针对相同敏感值数据集进行泛化操作的算法,以相同疾病数据集为实验数据对泛化结果进行对比分析,选择结果较优的泛化算法作为相同敏感值数据集的隐私保护方法.
基于设备驱动的综合柔性调度冲突调解算法
谢志强,含笑,于洁,桂忠艳
北京理工大学学报 , 2014,
Abstract: 设备驱动时刻按最短加工用时确定工序设备,为避免两个设备选择同一工序发生冲突导致可调度工序延迟完成影响调度结果的问题,提出基于设备驱动的综合柔性调度冲突调解算法.该算法分别从可调度工序集中为发生冲突的两个空闲设备选择加工时间次短的预调度工序,通过对可能加工的组合方案预调度,选择设备驱动时刻尽早结束的组合方案调度;当存在一个空闲设备有多个可调度最短加工工序时,采用实质短路径策略确定调度工序.分析和实例表明,本文算法可缩短存在设备/工序选择冲突的综合柔性调度总加工时间.
钢筋自密实混凝土梁正截面承载力试验分析
薛洲海,叶燕华,孙锐,含笑
南京工业大学学报(自然科学版) , 2013, DOI: 10.3969/j.issn.1671-7627.2013.06.014
Abstract: 基于钢筋自密实混凝土梁受弯试验,探讨混凝土强度和配筋率对钢筋自密实混凝土梁正截面受弯性能、开裂弯矩和受弯极限承载力的影响;并将试验结果与我国现行《混凝土结构设计规范》(gb50010—2010)以及相关文献进行比较分析。结果表明:自密实混凝土梁正截面极限承载力高于普通混凝土梁;自密实混凝土开裂弯矩比普通混凝土稍低;随自密实混凝土强度和配筋率的提高,梁极限承载力提高显著。
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