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A FACILE SYNTHESIS OF 2-AND 2,4-UNSATURATED AMIDES

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Chinese Chemical Letters 1990年第3期1卷 211-212页

作者： Qi ZHONG Chang Qing LIU Chemistry Department,yangzhou Teachers College,yangzhou,225002

A convenient method for preparing unsaturated amides via telluro- nium salts employing solid potassium carbonate as a base with high stereo- selectivity in excellent yields has been developed.

关键词： A FACILE SYNTHESIS OF 2-AND 2,4-UNSATURATED AMIDES Za

A Knowledge Tree Model for Managing Organizational Knowledge

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Systems Science and Systems Engineering 2002年第3期11卷 313-318页

作者： BAO Zhen-qiang 1,2, wang Ning-sheng11.Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China2.yangzhou University, yangzhou 225009, China Nanjing University of Aeronautics and Astronautics Nanjing 210016 China yangzhou University Yangzhou 225009 China Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

According to the relation of organizational knowledge, this paper analyzes the structure of organizational knowledge at first. A concept of knowledge tree is introduced and a process model of knowledge management is described by a knowledge tree. In this paper a definition of value of knowledge is given and the life cycle of a knowledge tree is analyzed. Finally, some principles for knowledge management are presented.

关键词： organizational knowledge knowledge tree knowledge management model

Another Characterization of Hilbert Spaces(Dedicated to Professor You Zhaoyong for his 60th birthday)

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工程数学学报 1991年第2期8卷 119-122页

作者： Yao Lin(yangzhou Teachers College)

1. Introduction Let X be a real Banach space with norm ‖ ‖,B(x,r) the closed ball in X defined by B(x,r)={z∈X| ‖ z—x ‖

关键词：数学学报工程一价

Effect of Organic Ligands on Biological Availability of Inorganic Phosphorus in Soils

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Pedosphere 2004年第1期14卷 85-92页

作者： FENGKe LUHai-Ming SHENGHai-Jun wangXiao-Li MAOJian AgriculturalCollege YangzhouUniversityYangzhou225009（China）

Citrate, oxalate, tartrate and malate were added into soils during the growthperiod of ryegrass to study the effect of different organic ligands on the release of variousinorganic P (Pi) fractions in a yellow-brown soil and a paddy soil. The results showed that oxalatewas most effective in promoting the release of total Pi in the yellow-brown soil and tartrate in thepaddy soil. The dominant Pi fractions released from the yellow-brown soil were calcium phosphate(Ca-P) and aluminum phosphate (Al-P) and those from the paddy soil were iron phosphate (Fe-P) andreductant soluble phosphate (O-P) mobilized by tartrate. Phosphorous-mobilizing capability oforganic acids in the yellow-brown soil revealed the following order: oxalate > citrate > malate >tartrate. In the paddy soil, the order was tartrate > citrate ≈ oxalate > malate. It wasdemonstrated that organic ligands were different in their capabilities of mobilizing Pi and the sameorganic ligand showed also a discrepancy in mobilizing P in different soils. Although the additionof organic ligands into soils could increase the amount of P taken up by ryegrass, the more uptakeof P, however, was not only due to the more release of Pi, but also partly from organic P. In manycases, organic ligands promoted the release of the total Pi, while different fractions showeddifferent trends: some increased and others decreased.

关键词： biological availability inorganic P release organic ligands ryegrass

Source-sink Characteristics and the Translocation of Assi- milates in New Plant Type and Intersubspecific Hybrid Rice

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Agricultural Sciences in China 2002年第2期1卷 155-162页

作者： YANG Jian-chang, ZHANG Wen-hu, wang Zhi-qin, LIU Li-jun and ZHU Qing-sen( Key Laboratory of Crop Cultivation and Physiology, MOA , yangzhou University, yangzhou 225009) Key Laboratory of Crop Cultivation and Physiology MOA Yangzhou University Yangzhou 225009

Both new plant type (NPT) and intersubspecific hybrid rice (IHR) had large sink size (total number of spikelets per m2), however, poor grain filling limited their potential in the grain yield. Compared to the three-line indica hybrid of Shanyou 63 (CK), NPT and IHR showed higher photosynthetic potential, higher dry matter accumulation and higher ratio of dry weight to spikelets (total dry wt./total number of spikelets) from heading to harvest. But both exhibited a low export percentage and transfer ratio of assimilates, low partitioning of 14C to grains from labeled flag leaves, low harvest indices and low physiological activities (IAA content and activities of ATPase and starch synthase) of grains at early grain-filling stage. The physiological activities of grains at early filling stage were significantly correlated with the export percentage and transfer ratio of assimilates, ripened-grain percentage and grain plumpness (r = 0.85 - 0.95). The source-sink ratio (dry matter wt./spikelet and nonstructural carbohydrate/spikelet) at heading was positively correlated with physiological activities of grains (r = 0. 84 - 0. 97 ). It is suggested that low physiological activities of grains at early filling stage is attributed to low source-sink ratio at heading, and the low sink activity weakens the ability to remobilize assimilates into grains, and leads to poor grain filling in NPT and IHR.

关键词： Rice New plant type Intersubspecifiic hybrid Source-sink Assimilate translocation

Impact of living mulch on soil C:N:P stoichiometry in orchards across China:A meta-analysis examining climatic,edaphic,and biotic dependency

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Pedosphere 2020年第2期30卷 181-189页

作者： Guo CHEN Shibin LIU yangzhou XIANG Xiaolu TANG Haitao LIU Bin YAO Xuqiang LUO College of Earth Science Chengdu University of TechnologyChengdu 610059China School of Geography and Resources Guizhou Education UniversityGuiyang 550018China Resources and Environment College Henan Agricultural UniversityZhengzhou 450002China Institute of Desertification Studies Chinese Academy of ForestryBeijing 100091China

The use of living mulch in orchards is a widely accepted management strategy for improving soil quality and enhancing tree *** the effects of living mulch on soil organic carbon(C)and nutrients have been previously investigated,changes in the stoichiometric ratios of C,soil total nitrogen(N),and soil total phosphorous(P)under different climatic,edaphic,and biotic conditions are currently *** factors are important indicators of elemental balance associated with ecological *** order to examine the effects of living mulch in orchards on soil C:N:P stoichiometry under different conditions,a meta-analysis was *** results showed that in general,living mulch significantly(P10 years),an occurrence which may be related to changes in the amount of *** life history also had a significant influence on the treatment effect on soil stoichiometry,while N-fixing characteristics did *** treatment effect was significant in areas with moderate mean annual temperature and mean annual precipitation,which might be related to the litter ratio of grass and *** on stoichiometric ratios were significant in the top soil layer(0–20 cm),in contrast to the deep soil ***,grass species and management practices,such as fertilization,should be selected according to the specific soil and climatic conditions of the management area.

关键词： elemental balance grass species interaction management practices N fixation stoichiometric ratio

MULTI-TILLERING DWARF1, a new allele of BRITTLE CULM 12, affects plant height and tiller in rice

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Science Bulletin 2016年第23期61卷 1810-1817页

作者： Haiping Yu Deyong Ren yangzhou Zhu Jiangmin Xu Yuexing wang Ruifang Liu Yunxia Fang Zhenyuan Shi Jiangjie Pan Mei Lu Bojun Ma Jiang Hu Yuchun Rao College of Chemistry and Life Sciences Zhejiang Normal University State Key Laboratory for Rice Biology China National Rice Research Institute Key Laboratory of Northeast Rice Biology and Breeding Ministry of Agriculture and Key Laboratory of Northern Japonica Rice Genetics and Breeding Ministry of EducationRice Research Institute Shenyang Agricultural University

Plant height and tillering are crucial factors determining rice plant architecture and influencing rice grain production. In this study, rnulti-tillering dwarf1 （mtdl）, a stable multi-tiller and dwarf mutant, was screened from the ethylmethane sulfonate-treated japonica rice variety Wuyunging7. Compared with the wild type, mtdl mutant exhibited pleiotropic phenotypes, including dwarf- ism, more tillers, brittle culms and delayed heading date. By employing map-based cloning strategy, the gene MTD1 was finally mapped to an approximately 66-kb region on the short arm of chromosome 9. Sequencing results showed that the gene LOCOsO9g02650 （BC12） in mtdl mutant had a single nucleotide substitution （G to A）, which gen- erated a premature translation stop. Over-expressing MTD1/BC12 coding sequ（nce rescued all the phenotypes of mtdl mutants including plant height and tillers, which confirms that BC12 is the mutated gene in mtdl mutant. Quantitative reverse tran,-eription-PCR analysis showed that MTDI/BCI2 could negatively regulate the expression of MONOCULM 1, IDEAL PLANT ARCHITECTURE1 and Tillering and Dwarf 1, and control rice tillering. Remark- ably, a-amylase activity analysis and gibberellic acid （GA） treatment showed that the dwarf phenotype of mtdl mutant was dependent on GA biosynthesis pathway. These results facilitated to further uncover the molecular mechanism of the growth and development in rice.

关键词： Rice - Dwarf Tillering - mtdl Gene cloning

Dynamic airspace sectorization via improved genetic algorithm

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Journal of Modern Transportation 2013年第2期21卷 117-124页

作者： yangzhou Chen Hong Bi Defu Zhang Zhuoxi Song College of Electronic Information and Control Engineering Beijing University of Technology

This paper deals with dynamic airspace sectorization （DAS） problem by an improved genetic algorithm （iGA）. A graph model is first constructed that represents the airspace static structure. Then the DAS problem is formulated as a graph-partitioning problem to balance the sector workload under the premise of ensuring safety. In the iGA, multiple populations and hybrid coding are applied to determine the optimal sector number and airspace sectorization. The sector constraints are well satisfied by the improved genetic operators and protect zones. This method is validated by being applied to the airspace of North China in terms of three indexes, which are sector balancing index, coordination workload index and sector average flight time index. The improvement is obvious, as the sector balancing index is reduced by 16.5 %, the coordination workload index is reduced by 11.2 %, and the sector average flight time index is increased by 11.4 % during the peak-hour traffic.

关键词： Dynamic airspace sectorization (DAS) Improved genetic algorithm (iGA) Graph model Multiple populations Hybrid coding Sector constraints

Rational points and zeta functions of some curves over finite fields

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Science China Mathematics 2010年第11期53卷 2855-2863页

作者： wang Long1, & LUO JinQuan2,3 1Department of Mathematical Sciences, Tsinghua University, Beijing 100084, China 2School of Mathematical Sciences, yangzhou University, yangzhou 225002, China 3Division of Mathematical Sciences, School of Physical and Mathematical Sciences, Nanyang Technology University, 637371, Singapore Department of Mathematical Sciences Tsinghua University Beijing China School of Mathematical Sciences Yangzhou University Yangzhou China Division of Mathematical Sciences School of Physical and Mathematical Sciences Nanyang Technology University Singapore Singapore

In this paper we study the number of rational points on some curves over finite fields. Moreover, zeta functions of the associated function fields are evaluated explicitly.

关键词： exponential sum rational point rational place zeta function