检索结果-南通市图书馆

Journal of Systems Science & Complexity 2012年第6期25卷 1122-1135页

作者： Yinghui TANG Miaomiao YU Xi YUN shujuan huang School of Mathematics and Software Science Sichuan Normal University School of Science Sichuan University of Science and Engineering School of Mathematics University of Electronic Science and Technology of China

This paper considers the discrete-time GeoX/G/1 queueing model with unreliable service station and multiple adaptive delayed vacations from the perspective of reliability research. Following problems will be discussed： 1） The probability that the server is in a ＂generalized busy period＂ at time n; 2） The probability that the service station is in failure at time n, i.e., the transient unavailability of the service station, and the steady state unavailability of the service station; 3） The expected number of service station failures during the time interval （0, hi, and the steady state failure frequency of the service station; 4） The expected number of service station breakdowns in a server＇s ＂generalized busy period＂. Finally, the authors demonstrate that some common discrete-time queueing models with unreliable service station are special cases of the model discussed in this paper.

关键词： Delayed vacation policy discrete-time queueing model failure frequency reliability index total probability decomposition unavailability unreliable.

PERFORMANCE IMPROVEMENT OF CENTRIFUGAL FAN BY MEANS OF NUMERICAL SIMULATION

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Chinese Journal of Mechanical Engineering 2006年第1期19卷 55-58页

作者： ZHANG Bo huang shujuan SUN Zhongwei HUI Shien LIU Jiayu QI Chunsong Institute of Energy and Power Engineering Xi＇ an Jiaotong University Xi＇ an 710049 China Thermal Power Research Institute State Power Corporation of China Xi＇ an 710032 China

Numerical simulation is used to investigate the flow field in a model centrifugal fan for steam power stations in order to improve the performance. During testing the model fan, it is found that the efficiency is only 62.5% with inlet box, without it the efficiency is 83%. In addition, the strong vibration of test rig is observed with inlet box. It would be highly desirable if the aerodynamics of the fan could be studied. Therefore, numerical simulation is carried out to investigate the internal flow characteristics of a model fan with inlet box. The results from CFD analysis show that the whole region of the inlet box is occupied by a spiral vortex rotating inversely as the rotor＇s direction, which significantly affect the most flow＇region inside the fan. For this reason, a dummy plate is arranged in the inlet box to impede the generation of the spiral vortex, the results from CFD after the reform demonstrate that the modification is quiet effective, the former large spiral vertex has been destroyed effectively, the large one is superseded in favor of two small vortexes. However, two small vortexes have little effect on the inner flow of the rotor and the following parts. Finally, the efficiency of the model fan is improved by the test and the strong vibration of the test rig disappears. This type of modification has been used in steam power stations, the fan efficiency raises to 84% successfully.

关键词： Numerical simulation Centrifugal fan Vortex Performance improvement

ACSL5,a prognostic factor in acute myeloid leukemia,modulates the activity of Wnt/β-catenin signaling by palmitoylation modification

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Frontiers of Medicine 2023年第4期17卷 685-698页

作者： Wenle Ye Jinghan Wang Jiansong huang Xiao He Zhixin Ma Xia Li Xin huang Fenglin Li shujuan huang Jiajia Pan Jingrui Jin Qing Ling Yungui Wang Yongping Yu Jie Sun Jie Jin Department of Hematology The First Affiliated HospitalZhejiang University College of MedicineHangzhou 310003China Key Laboratory of Hematopoietic Malignancies Diagnosis and TreatmentHangzhou 310009China Research Centre Centre hospitalier de l’Universitéde Montréal(CRCHUM)MontrealQuebec H2L 4M1Canada Women’s Hospital School of MedicineZhejiang UniversityHangzhou 310006China Zhejiang Province Key Laboratory of Anti-Cancer Drug Research College of Pharmaceutical SciencesZhejiang UniversityHangzhou 310058China Cancer Center Zhejiang UniversityHangzhou 310058China

Acyl-CoA synthetase long chain family member 5(ACSL5),is a member of the acyl-CoA synthetases(ACSs)family that activates long chain fatty acids by catalyzing the synthesis of fatty *** dysregulation of ACSL5 has been reported in some cancers,such as glioma and colon ***,little is known about the role of ACSL5 in acute myeloid leukemia(AML).We found that the expression of ACSL5 was higher in bone marrow cells from AML patients compared with that from healthy ***5 level could serve as an independent prognostic predictor of the overall survival of AML *** AML cells,the ACSL5 knockdown inhibited cell growth both in vitro and in ***,the knockdown of ACSL5 suppressed the activation of the Wnt/β-catenin pathway by suppressing the palmitoylation modification of ***,triacsin c,a pan-ACS family inhibitor,inhibited cell growth and robustly induced cell apoptosis when combined with ABT-199,the FDA approved BCL-2 inhibitor for AML *** results indicate that ACSL5 is a potential prognosis marker for AML and a promising pharmacological target for the treatment of molecularly stratified AML.

关键词： acute myeloid leukemia acyl-CoA synthetase long chain family member 5 Wnt3a palmitoylation ABT-199

New Application of a Series of Preservatives Derived from Amino Acid for Cosmetic Products

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China Detergent & Cosmetics 2016年第2期1卷 55-59页

作者： shujuan huang Huiyu Wang Hongyu Xue Shanghai Zhongshi Science and Technology Development Co. Ltd. China Nanjing Hua Shi New Materials Co. Ltd. China

The safety and antimicrobial efficacy of Ethyl lauroyl arginate HCI while using as a preservative have been introduced. Meanwhile the antimicrobial mechanism, the minimal inhibitory concentration and the stability to heat and pH range of ethyl lauroyl arginate HCI have been introduced. The new preservatives have been developed, they are the compounds containing ethyl lauroyl arginate HCI. The high efficacy of antimicrobial of Ethyl lauroyl arginate HCI series products ha been described while added into the formulations of amino acid shampoo and toner. It has been proved that ethyl lauroyl arginate HCI series products can be the optimized option for the alternative of traditional preservatives for cosmetic products.

关键词： Ethyl lauroyl arginate HCI preservatives high efficacy with high safety cosmetic products

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基于并行优先级任务树的多核调度方法研究

西北工业大学学报 2012年第5期30卷 652-656页

作者：黄姝娟朱怡安西北工业大学计算机学院陕西西安710072 西北工业大学软件与微电子学院陕西西安710072

文章针对具有复杂依赖关系的实时周期任务难以调度的问题,提出了一种模型转化方法,该方法将具有复杂关系的实时结点任务图转化为并行优先级任务树,然后根据模型中定义的优先关系并结合EDF(Earliest Deadline First)算法,将任务调度到相... 详细信息

文章针对具有复杂依赖关系的实时周期任务难以调度的问题,提出了一种模型转化方法,该方法将具有复杂关系的实时结点任务图转化为并行优先级任务树,然后根据模型中定义的优先关系并结合EDF(Earliest Deadline First)算法,将任务调度到相应的核上去执行。仿真试验表明,该方法比核与任务相对应的分配方法不仅可以提高CPU利用率而且大大减少了核间通信的开销。

关键词：并行优先级任务树有向无环图多核实时任务

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壁面摩擦应力直接测量技术探讨

西安交通大学学报 2000年第11期34卷 36-39页

作者：宫武旗黄淑娟徐忠西安交通大学西安710049

自行研制了一台采用误差抵消校准法的阻力天平仪 .在一定的雷诺数范围内 ,对风洞内壁光滑平板壁面 ,用此天平仪测量了流体的摩擦应力及摩擦系数 .用IFA30 0型热线风速仪测量了相应雷诺数下边界层的平均速度分布 ,然后由相似律法和布拉... 详细信息

自行研制了一台采用误差抵消校准法的阻力天平仪 .在一定的雷诺数范围内 ,对风洞内壁光滑平板壁面 ,用此天平仪测量了流体的摩擦应力及摩擦系数 .用IFA30 0型热线风速仪测量了相应雷诺数下边界层的平均速度分布 ,然后由相似律法和布拉修斯经验公式分别计算了摩擦应力及摩擦系数 .结果对比表明 ,采用的原理及校准方法合理 ,所制作的天平仪在试验雷诺数范围内 ,具有较高的测量精度和较小的相对误差。

关键词：阻力天平摩擦力摩擦系数天平仪

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城市生活垃圾处理费计取方法及实施条件研究

环境卫生工程 2024年第4期32卷 105-111页

作者：黄淑娟李航南宁市环境卫生管理处广西南宁530011

随着生活垃圾分类制度的普遍推行及分类体系的不断完善,探索建立与生活垃圾分类制度相衔接的计量收费、分类计价的生活垃圾处理收费制度至关重要。在对推行生活垃圾分类制度城市的税收、直接收费和间接收费等3种生活垃圾处理费收费制度... 详细信息

随着生活垃圾分类制度的普遍推行及分类体系的不断完善,探索建立与生活垃圾分类制度相衔接的计量收费、分类计价的生活垃圾处理收费制度至关重要。在对推行生活垃圾分类制度城市的税收、直接收费和间接收费等3种生活垃圾处理费收费制度类型,相应的处理费计取方法和应用案例,以及不同计取方法的利弊等进行综合分析的基础上,研究各类城市生活垃圾处理费计取方法的具体实施条件,并提出对策建议,进而为生活垃圾处理费收费制度的建立、健全及执行提供借鉴。

关键词：生活垃圾处理费计取方法税收直接收费间接收费水消费系数法

同方期刊数据库博看期刊评论

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论高校图书馆的大学生信息素质教育

图书馆 2003年第2期 83-84,93页

作者：黄淑娟郴州师范高等专科学校湖南郴州423000

信息素质是大学生素质组成的一个重要部分。大学生的信息素质教育对于培养大学生掌握适应社会生活的必备技能 ,提高大学生在信息社会的生存能力具有重要意义。

关键词：高校图书馆大学生信息素质教育信息素质用户教育信息意识信息能力

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部分流泵非定常流动分析

西安交通大学学报 2005年第9期39卷 954-957页

作者：陈党民李新宏黄淑娟西安交通大学能源与动力工程学院西安710049 西安陕鼓动力股份有限公司西安710611

在设计工况下采用滑移网格技术对部分流泵进行了整机非定常流动数值计算,分析了叶轮、蜗壳内典型的非定常流动规律.计算表明:部分流泵内流的非定常特性明显,蜗壳喉部尤为剧烈;瞬时扬程的变化是由于叶轮与蜗壳喉部强烈的非定常流动特性... 详细信息

在设计工况下采用滑移网格技术对部分流泵进行了整机非定常流动数值计算,分析了叶轮、蜗壳内典型的非定常流动规律.计算表明:部分流泵内流的非定常特性明显,蜗壳喉部尤为剧烈;瞬时扬程的变化是由于叶轮与蜗壳喉部强烈的非定常流动特性所决定的,只有采用非定常计算方法才能反映其内流的实质.该计算为进一步研究部分流泵的内流现象、提高效率、减少水力损失提供了一定的理论依据.

关键词：部分流泵非定常流动数值计算

文化距离对“一带一路”国家文化产品贸易效率影响的随机前沿分析

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南开经济研究 2017年第4期 125-140页

作者：范兆斌黄淑娟暨南大学国际商学院

本文运用随机前沿贸易引力模型,评估了文化距离对"一带一路"沿线国家文化产品贸易效率的影响。分析显示,文化距离对文化产品贸易效率的影响具有倒U型特征,即当文化距离较小时,文化距离对于双边文化产品贸易具有促进作用,但当文化距离高... 详细信息

本文运用随机前沿贸易引力模型,评估了文化距离对"一带一路"沿线国家文化产品贸易效率的影响。分析显示,文化距离对文化产品贸易效率的影响具有倒U型特征,即当文化距离较小时,文化距离对于双边文化产品贸易具有促进作用,但当文化距离高于某一门槛值后,文化距离又反过来会阻碍双边文化产品贸易。文化产品贸易效率还与进口国的产权保护、金融自由度、自贸协定、政府效率、信息化建设等政策性因素密切相关。中国与"一带一路"沿线国家的文化产品贸易存在较大的潜力,而且出口绩效在不同国家之间呈现出较大的不均衡性。

关键词：文化距离贸易效率文化产品随机前沿引力模型一带一路