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再生骨料掺量对透水混凝土性能的影响

应用基础与工程科学学报 2018年第1期26卷 98-108页

作者：陈守开常承艳郭磊薛志龙华北水利水电大学水利学院河南郑州450045 河南省水环境模拟与治理重点实验室河南郑州450002 河南省水环境治理与生态修复院士工作站河南郑州450002 水资源高效利用与保障工程河南省协同创新中心河南郑州450002

再生透水混凝土是一种环保型、节材型建筑材料,符合我国当前循环经济与环境保护的发展需求,但目前其性能的研究尚不充分,推广应用还受限制.采用以废弃预制混凝土梁构件为再生骨料来源,通过破碎、筛分获得再生粗骨料,配制再生骨料透水混... 详细信息

再生透水混凝土是一种环保型、节材型建筑材料,符合我国当前循环经济与环境保护的发展需求,但目前其性能的研究尚不充分,推广应用还受限制.采用以废弃预制混凝土梁构件为再生骨料来源,通过破碎、筛分获得再生粗骨料,配制再生骨料透水混凝土,以取代率及粒级为变化参数,设计了5组配合比.通过试验,获取再生粗骨料的物理性能指标及再生透水混凝土的抗压强度、劈拉强度、孔隙率、透水系数等性能指标,分析了再生骨料透水混凝土的强度、孔隙率及透水之间的关联关系.结果表明,再生粗骨料2.h吸水率比天然骨料高约11倍;再生骨料透水混凝土的孔隙率为14.2.~2..44%,透水系数为0.19~0.46cm,且透水系数随着孔隙率的增加而提高;掺入再生粗骨料的透水混凝土抗压强度随着取代率的增加而提高,替代率为3.%时,提高幅度最大;采用双粒级骨料,可提高抗压强度3..4%,但透水性能随之下降.

关键词：再生骨料透水混凝土强度透水性

A research of Information Management System Solution Base on Centos ＆ Oracle

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A Research of Information Management System Solution Base on...

第三届国际计算机及计算技术农业应用学术会议

作者： Lin Lu~1 Guang Cen~2.Wanlin Gao~(2.) Qing Wang~2.Jianing Zhao~2.Jianhui Du~3.1 Kunming Agriculture machinery research institute Yunnan Province P.R.China 2.College of Information and Electrical engineering China Agricultural {2. Beijing P.R.China 3.Yunnan Agriculture Department Yunnan Province P.R.China

＜正＞With the rapid and exciting development,a lot of open source software have been applied in various fields and evaluated very *** to take advantage of open source to structure large scale information management systems for reducing the cost of application developments has become a meaningful *** paper is focused on CentOS and Ubuntu Server,both falling into open source Linux operation systems,and proposed a method for developing large scale information management system based on them using B/S three-tier ***,in order to verify the applicability of the method under various Web.2.0 standard applications,a testing system with a massive data named Alumni Information Management System has been *** paper,not only verifies the effectiveness of the approach of CentOS and Oracle for large scale information management system,but also discusses the puzzles in the *** paper gives a technical reference for the other similar projects to improve the utilization of open source software.

关键词： large scale information management system Oracle CentOS open source

Controller Synthesis of Continuous-Time Piecewise Linear Systems Based on Piecewise Lyapunov Functions

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Controller Synthesis of Continuous-Time Piecewise Linear Sys...

第三十届中国控制会议

作者： QIU Jianbin~1,FENG Gang~2.GAO Huijun~1 1.Space Control and Inertial Technology research center,Harbin Institute of Technology,Harbin 150001,P.R.China 2.Department of Manufacturing {2. and {2. Management,City university of Hong Kong,Kowloon,Hong Kong

This paper investigates the robust H static output feedback(SOF) controller design for a class of continuous- time piecewise linear *** objective is to design a piecewise SOF controller guaranteeing the asymptotic stability of the resulting closed-loop system with a prescribed H disturbance attenuation *** on common/piecewise Lyapunov functions combined with Projection Lemma and some convexiflcation techniques,some new results to the SOF controller design are developed for the underlying continuous-time piecewise linear *** is shown that the controller gains can be obtained by solving a set of linear matrix inequalities,which are numerically efficient with commercially available software.A simulation example is also given to illustrate the effectiveness of the proposed approaches.

关键词： Piecewise Linear Systems Output Feedback Piecewise Lyapunov Functions Controller Design

Genome-wide SNP in silico detection of Lentinula edodes via whole genome sequencing

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Genome-wide SNP in silico detection of Lentinula edodes via ...

中国菌物学会第五届会员代表大会暨2.11年学术年会

作者： CHEN Xiang BAO Da-Peng (national research {2. for Edible Fungi Biotechnology and {3. Key Laboratory of Applied Mycological resources and utilization,Ministry of Agriculture,China Shanghai Key Laboratory of Agricultural Genetics and Breeding Institute of Edible Fungi,Shanghai Academy of Agricultural Sciences,Shanghai,China)

＜正＞Analysis of single nucleotide polymorphisms（SNPs） emerges as an important tool in evolutionary biology and *** we report the in silico discovery and analysis of SNPs across the whole genome of two protoplast monokaryons（TPMs） of basidiomycete fungi Lentinula edodes via the high-throughput sequencing *** our knowledge,this is a novel study in which different protoplast monokaryons are utilized for SNPs detection and *** sequence information including 2.0M and 2.0M nucleotide bases was generated from TPMs yielding approximately 80%of whole genome *** used surpassed 3.0K and 410K reads of TPMs for the de novo assembly of two contig sets with an overall estimated depth of 5.67-fold and 6.05-fold coverage,*** of the contigs between TPMs identified 108,2.5 putative SNPs owning a high probability of at least 10-fold *** SNPs reveal TPMs having similar intra-strain SNP frequencies,and the ratio of transition to transversion among these SNPs being similar to the ratio reported in other *** verify the confidence of detected SNPs,2.,044 SNPs were mapped onto 43.912.positions that uniformly distributed over the sequenced chromosomes of Coprinopsis *** result shows high sequence conservation among closely related fungal *** addition,the gene structure of TPMs was constructed for SNPs classification according to their distribution in genome ***,this study indicates the utility of using next generation sequencing technologies to identify large numbers of reliable ***,the method combination of SNP detection and novel algorithm allows an efficient approach for the development of high-density genotyping platforms in fungal species.

关键词： Lentinula edodes whole genome sequencing contig assembly SNPs

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敏捷供需链中业务过程管理系统的模型分析

计算机工程与应用 2002年第8期38卷 214-216页

作者：来国明柴跃廷刘义清华大学国家CIMS工程中心北京100084

敏捷供需链是为适应市场激烈竞争而组成的上下游企业间的动态联盟。业务过程的有效管理对于敏捷供需链的优势发挥及其重要。工作流技术是业务过程优化管理的有效方法,但敏捷供需链动态性、分布式的环境对工作流技术的实现机制提出了柔... 详细信息

敏捷供需链是为适应市场激烈竞争而组成的上下游企业间的动态联盟。业务过程的有效管理对于敏捷供需链的优势发挥及其重要。工作流技术是业务过程优化管理的有效方法,但敏捷供需链动态性、分布式的环境对工作流技术的实现机制提出了柔性要求。文章从工作流技术的思想出发,提出了敏捷供需链中业务过程的优化管理体系结构和执行机制,该方案可以有效地适应敏捷供需链的运作。

关键词：敏捷供需链事件驱动业务过程管理系统企业管理模型分析

Degradation of lignite model compounds by the action of white rot fungi

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Mining Science and Technology 2010年第1期20卷 76-81页

作者： DU Ying, TAO Xiuxiang, SHI Kaiyi, LI Yang School of Chemical engineering and Technology, China university of Mining & Technology, Xuzhou 2.1000, China School of Chemical engineering and Technology China University of Mining & Technology Xuzhou 221000 China

Three compounds modeled on the lignite structure were chosen for experimental degradation by different fungi strains. Culture conditions and extracellular enzyme activities were optimized. The growth curves of the strains were determined to study mycelium dry weight and protein content changes. Gas chromatography and infrared spectroscopy were used to detect changes of functional groups before and after the action of the fungi on the model compounds. Possible decomposition products and degrada-tion mechanisms were proposed. The research findings show that C. Versicolor and Golden Mushroom can grow in presence of the model compounds. The optimum culture conditions were a pH of 6.0, a carbon-nitrogen ratio of five and a Tween-80 concentration of 0.1%. Newly produced substances were found by gas chromatography. Infrared analysis showed that the model compounds degraded under the action of the microorganisms.

关键词： coal biotransformation white rot fungi mechanism model compound

Achieving efficient Channel utilization for Data Communications in IEEE 802.11 WLAN

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Transactions of Tianjin university 2005年第6期11卷 422-427页

作者：张亮舒炎泰 School of Electronic Information engineering Tianjin UniversityTianjin 300072China

In the IEEE g02. 11 protocol, the adoption of the exponential backoff technique leads to throughput performance strongly dependent on the initial contention window size and, most importantly, on the number of contending stations considered in the network. This paper proposes a simple but accurate method to dynamically estimate the number of contending stations in a wireless local area network （ WLAN ）. Based on estimation, all the mobile stations dynamically adjust the initial contention window in medium access control （ MAC ） layer to avoid collisions. The simulation results show that the proposed algorithm can achieve efficient channel utilization, higher system throughput, and better fairness performance.

关键词： IEEE 802.11 wireless local area network( WLAN ) distributed coordination function ( DCF )

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综合业务接入ATM网络的资源共享

通信学报 2001年第9期22卷 70-77页

作者：兰巨龙邬江兴李鸥解放军信息工程大学国家数字交换系统工程技术研究中心郑州450002

本文提出了一种在ATM网络中传输综合业务的资源共享方案。该方案中 ,每一VP只传输一类业务 ,并根据各类业务的带宽、各VP传输的业务量和链路的剩余带宽动态分配各个VP占用的宽宽 ,在保证各类业务呼损率的前提下 ,可获得提高传输效率和... 详细信息

本文提出了一种在ATM网络中传输综合业务的资源共享方案。该方案中 ,每一VP只传输一类业务 ,并根据各类业务的带宽、各VP传输的业务量和链路的剩余带宽动态分配各个VP占用的宽宽 ,在保证各类业务呼损率的前提下 ,可获得提高传输效率和降低节点归一化处理负荷的良好折衷。本文还引入了迟滞和资源预留两个概念 ,并分析了它们对呼损率和节点的归一化处理负荷的影响。

关键词：综合业务接入通信网资源共享异步转移模式

高矿化度环境下黏性土对膨润土-砂土复合防渗层抗渗性的影响研究

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节水灌溉 2011年第11期 67-69,72页

作者：王晓芸崔自治张群崔永成宁夏大学旱区现代农业水资源高效利用教育部工程研究中心宁夏银川750021

以宁夏广泛分布的砂土为研究对象,以黏性土掺量c、盐浓度d、盐的复合比r、膨润土掺量p为因素,渗透系数为考察参数,设计L9(3.)正交实验方案和单因素实验方案,实验研究了盐对膨润土-黏性土-砂土复合防渗层抗渗性的影响,揭示了黏性土掺量c... 详细信息

以宁夏广泛分布的砂土为研究对象,以黏性土掺量c、盐浓度d、盐的复合比r、膨润土掺量p为因素,渗透系数为考察参数,设计L9(3.)正交实验方案和单因素实验方案,实验研究了盐对膨润土-黏性土-砂土复合防渗层抗渗性的影响,揭示了黏性土掺量c、盐浓度d、盐的复合比r、膨润土掺量p等因素对膨润土-黏性土-砂土复合防渗层抗渗性的作用规律和作用机理,为砂土基防渗层设计、施工提供理论依据。实验研究表明:在盐溶液环境中,膨润土的作用效应降低,黏性土的作用效应显著增强,但膨润土仍然是影响砂土基防渗层渗透性最主要的因素;土样的渗透系数随着盐溶液复合比的增大,呈现出先减小,后略微增大的趋势;黏性土使盐对砂土基防渗层的抗渗性影响显著降低,尤其是在高矿化度环境下,作用效应更为显著。

关键词：膨润土黏性土盐复合防渗