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地面灌溉土壤入渗参数时空变异性试验研究

水土保持学报 2005年第5期19卷 120-123,151页

作者：白美健许迪李益农李久生中国水利水电科学研究院水利研究所国家节水灌溉工程技术研究中心北京100044

基于典型田块的试验观测数据,开展地面灌溉条件下冬小麦生长期间土壤入渗性能时空变异性的试验研究,描述土壤入渗参数的时空变异分布特征,分析各参数间存在的相关关系。结果表明,在冬小麦生长期内,土壤入渗参数的空间变异强度呈持续性... 详细信息

基于典型田块的试验观测数据,开展地面灌溉条件下冬小麦生长期间土壤入渗性能时空变异性的试验研究,描述土壤入渗参数的时空变异分布特征,分析各参数间存在的相关关系。结果表明,在冬小麦生长期内,土壤入渗参数的空间变异强度呈持续性减弱趋势,其时间变异性逐渐下降并趋于稳定。土壤入渗性能在冬灌后各时段间的差异并不显著,故在此后的灌溉试验设计与管理或地面灌溉模拟中,可基本无需考虑土壤入渗性能的时间变异性影响。考虑到土壤入渗参数f0和Z180之间存在着强烈的互相关性和非常相近的时空变异分布特征,可借助f0的时空变异分布特点达到描述土壤入渗性能、衡量土壤入渗能力的目的。

关键词：试验入渗地面灌溉时空变异性

Comparative transcriptome profiling of chilling stress responsiveness in two contrasting rice genotypes

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Comparative transcriptome profiling of chilling stress respo...

从植物科学到农业发展——2012全国植物生物学大会

作者： Ting Zhang~(1,2),Xiuqin Zhao~2,Wensheng Wang~2,Yajiao Pan~2,Liyu Huang~2,Xiaoyue Liu~2,Ying Zong~2,Linghua Zhu~2,Daichang Yang~(1*),Binying Fu~(2*) 1 engineering research center for Plant Biotechnology and Germplasm utilization,Ministry of Education,State Key Laboratory of Hybrid Rice,College of Life Sciences,Wuhan University,Wuhan, 430072. 2 Institute of Crop Sciences/national Key Facility for Crop Gene resources and Genetic Improvement, Chinese Academy of Agricultural Sciences,Beijing,100081.

Rice is sensitive to chilling stress,especially at the seedling *** elucidate the molecular genetic mechanisms of chilling tolerance in rice,comprehensive gene expressions of two rice genotypes(chilling-tolerant LTH and chilling-sensitive IR29) with contrasting responses to chilling stress were comparatively *** revealed a differential constitutive gene expression prior to stress and distinct global transcription reprogramming between the two rice genotypes under time-series chilling stress and subsequent recovery conditions.A set of genes with higher basal expression were identified in chilling-tolerant LTH compared with chilling-sensitive IR29,indicating their possible role in intrinsic tolerance to chilling *** chilling stress,the major effect on gene expression was up-regulation in the chilling- tolerant genotype and strong repression in chilling-sensitive *** responses to chilling stress in both genotypes featured commonly up-regulated genes related to transcription regulation and signal transduction, while functional categories for late phase chilling regulated genes were diverse with a wide range of functional adaptations to continuous *** the cessation of chilling treatments,there was quick and efficient reversion of gene expression in the chilling-tolerant genotype,while the chilling-sensitive genotype displayed considerably slower recovering capacity at the transcriptional *** addition,the detection of differentially-regulated TF genes and enriched cis-elements demonstrated that multiple regulatory pathways,including CBF and MYBS3 regulons,were involved in chilling stress tolerance.A number of the chilling-regulated genes identified in this study were co-localized onto previously fine-mapped cold-tolerance-related QTLs,providing candidates for gene cloning and elucidation of molecular mechanisms responsible for chilling tolerance in rice.

关键词： Rice chilling tolerance differentially expressed genes CBF regulon QTL

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 engineering and engineering 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

PRCA： A highly efficient computing architecture

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engineering Sciences 2014年第4期12卷 38-47页

作者： Luo Xingguo national Digital Switching System engineering & Technological R&D center Zhengzhou 450002 China

Applications can only reach 8 %~15 % of utilization on modern computer systems. There are many obstacles to improving system efficiency. The key root is the conflict between the fixed general computer architecture and the variable requirements of applications. Proactive reconfigurable computing architecture(PRCA) is proposed to improve computing efficiency. PRCA dynamically constructs an efficient computing architecture for a specific application via reconfigurable technology by perceiving requirements,workload and utilization of computing resources. Proactive decision support system(PDSS),hybrid reconfigurable computing array(HRCA) and reconfigurable interconnect(RIC) are intensively researched as the key technologies. The principles of PRCA have been verified with four applications on a test bed. It is shown that PRCA is feasible and highly efficient.

关键词： PRCA efficient computing challenges

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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

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分段式全带宽动态分配算法研究

计算机工程与应用 2004年第32期40卷 148-151,161页

作者：韩国栋邬江兴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

为提高多业务分组系统的带宽利用效率,提出了一种分段式全带宽动态分配算法,该算法允许单业务流最大可用带宽超出其公平共享范围。分析和实践结果表明,在保持常规算法的带宽利用率、公平性和满足用户QoS指标的同时,该算法使有需求链路... 详细信息

为提高多业务分组系统的带宽利用效率,提出了一种分段式全带宽动态分配算法,该算法允许单业务流最大可用带宽超出其公平共享范围。分析和实践结果表明,在保持常规算法的带宽利用率、公平性和满足用户QoS指标的同时,该算法使有需求链路在系统处于非饱和状态时可占用全部剩余带宽(直至全带宽),显著提高系统的总带宽利用率。

关键词：全利用度动态带宽分配公平性带宽利用率

基于线粒体编码基因差异对食品中牛肉与猪肉成分的鉴别

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食品科技 2011年第1期36卷 84-88页

作者：张驰杨军王晓丽国家农副产品质量监督检验中心南京市产品质量监督检验院南京市食品质量安全检测工程技术研究中心南京210028

市场上有不法厂商使用深加工后的猪肉冒充或添加于牛肉进行销售,但针对熟制食品中猪肉和牛肉成分的辨别方法仍不够成熟。为建立灵敏、可靠的食品中猪肉和牛肉成分的鉴定方法,分别根据线粒体基因组和细胞基因组编码基因的差异设计多组物... 详细信息

市场上有不法厂商使用深加工后的猪肉冒充或添加于牛肉进行销售,但针对熟制食品中猪肉和牛肉成分的辨别方法仍不够成熟。为建立灵敏、可靠的食品中猪肉和牛肉成分的鉴定方法,分别根据线粒体基因组和细胞基因组编码基因的差异设计多组物种特异性引物,应用PCR技术对加工食品中的猪肉和牛肉成分进行鉴别。结果表明,两组基于线粒体编码基因差异所设计的引物各具优势,均可有效地进行食品中猪肉和牛肉成分的鉴定,检测灵敏度达纳克级DNA,且鉴定效果显著优于使用基于细胞基因组编码基因差异的引物。对市售食品样本的鉴别验证了方法的实用价值。总之,建立并优化了可用于深加工熟制食品中猪肉和牛肉成分鉴别的PCR方法,为肉制品质量控制提供了新的途径。

关键词：猪肉牛肉鉴别聚合酶链反应(PCR) 线粒体基因组

research on rotational speed to the influence of pump as turbine

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Research on rotational speed to the influence of pump as tur...

The 26th IAHR Symposium on Hydraulic Machinery and Systems

作者： S S Yang F Y Kong W M Jiang and X Y Qu research center of Fluid Machinery engineering and Technology Jiangsu University Zhenjiang Jiangsu 212013 china

Due to the problem of lacking hydraulic control devices,pump as turbine （PAT） has the disadvantage of optimum operation only within a small range discharge where the net head utilization and operating efficiency are the *** speed operation offers a good solution to this *** manufactures normally do not provide performance curves of their pumps working as turbines,especially when working at variable speed ***,establishing a correlation between PAT’s performance curve and rotational speed is *** this paper,a method of predicting PAT’s performance at different rotational speeds was first developed using theoretical *** the second step,a single stage centrifugal pump operated as a turbine was tested at different rotational *** performance curves of PAT operating at variable speed condition were *** computational fluid dynamics （CFD） had been used in this *** accuracy of CFD prediction was proved when compared with experimental *** validity of presented method by theoretical analysis was validated using test and CFD results.

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黄土高原小流域雨水资源化途径及效益分析

节水灌溉 2004年第1期 16-18页

作者：余海龙吴普特冯浩汪有科西北农林科技大学陕西杨凌712100 节水灌溉杨凌工程技术研究中心陕西杨凌712100

阐述了雨水资源化的概念、理论及其3种方式:就地拦蓄入渗、覆盖抑制蒸发和雨水富集叠加利用。详细介绍了雨水资源化技术途径,并且以准格尔旗雨水集蓄利用示范区的研究资料分析了雨水资源化的经济、社会、生态效益。

关键词：黄土高原雨水资源化雨水利用效益灌溉