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Projection Pursuit Clustering Model for Reservoir Flood Season Division

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Projection Pursuit Clustering Model for Reservoir Flood Seas...

2009中国控制与决策会议

作者： JIN Ju-liang~(1,2),DENG Chao-xian~2,WANG Yin-tang~3,LIU Ke-lin~3,WANG Zong-zhi~3,CHENG Liang~2 1.Chengdu institute of Plateau Meteorology,CM A,Chengdu 610072,china. 2.School of Civil Engineering,Hefei University of Technology,Hefei 230009,china. 3.state key laboratory of Hydrology-Water resources and Hydraulic Engineering,Nanjing Hydraulic Research institute,Nanjing 210029,china.

＜正＞Reservoir flood season division is an important foundation for optimizing reservoir seasonal flood limit levels and safely utilizing flood *** order to achieve multi-dimension clustering,time sequence partition and subjective and objective information utilization of reservoir flood season division,a Projection Pursuit Clustering model for reservoir Flood Season Division（PPC-FSD） was established in this *** applied results of PPC-FSD show that the first flood season,the main flood season and the last flood season of Panjiakou Reservoir of china are composed of from the first ten days of June to the first ten days of July,from the middle ten days of July to the middle ten days of August, and from the last ten days of August to the last ten days of September,*** first flood season,the main flood season and the last flood season of Miyun Reservoir of china are composed of from June 15 to June 30,from July 1 to August 15,and from August 16 to September 15,respectively;the physics mechanism analysis results of reservoir flood season can expediently be utilized by using projection index function of PPC-FSD,the optimal projection direction and partition point values of flood season can be obtained by using accelerating genetic *** optimal projection values express the integration relative membership function values of periods of time belonging to the fuzzy set of flood season,which can be used to design reservoir flood limit dynamic levels,and the optimal projection direction can be used to identify key indexes affecting reservoir flood season division based on matrix of index characteristic ***-FSD is visual,convenient and general,so it can be widely applied to reservoir flood management.

关键词： management of flood disaster reservoir flood season division clustering analysis projection pursuit Panjiakou Reservoir Miyun Reservoir genetic algorithm

Molecular characterizations of a novel Geobacillus virus E1 from deep-sea thermophile

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Molecular characterizations of a novel Geobacillus virus E1 ...

2006中国微生物学会第九次全国会员代表大会暨学术年会

作者： Bin Liu, Xiaobo Zhang key laboratory of Marine Biogenetic resources, Third institute of Oceanography, state Oceanic Administration, Xiamen 361005, PRC institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, 350002, PRC

Of the viruses, the least understood is thermophilic viruses. Viruses of thermophiles and extreme thermophiles can serve as model systems for understanding the biochemistry and molecular biology required for life at high temperatures. Moreover, they are of great importance to the understanding of genetic transfer, diversity and evolution of life on earth. Based on the reported studies, most of thermophilic viruses are obtained from hot springs, mud pots and solfataric fields throughout the world in

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Advances in Mapping Loci Conferring Resistance to Rice Sheath Blight and Mining Rhizoctonia solani Resistant resources

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Rice science 2011年第1期18卷 56-66页

作者： ZENG Yu-xiang JI Zhi-juan MA Liang-yong LI Xi-ming YANG Chang-deng state key laboratory of Rice Biology China National Rice Research Institute Hangzhou 310006 China

Sheath blight （SB） caused by Rhizoctonia solani is one of the three major diseases of rice, and now has become the most severe disease causing rice yield loss in china. Breeding and use of varieties resistant to SB is crucial in controlling the disease, but the advances achieved have been limited due to the tack of highly SB-resistant rice germplasm. genetic analysis revealed that the SB resistance in rice was a typical quantitative trait controlled by multi-genes. Although many QTLs conferring resistance to SB have been identified in recent years, most of the QTLs only showed small effects and few of them have been evaluated for utilization potential. Many R. solani-resistant resources have been found in wild rice species, microorganisms and other plant species. It is already known that the SB-resistance could be improved in transgenic rice plants by genetic transformation. This paper reviewed the genetic mapping of loci associated with resistance to rice SB, the evaluation of the potential of resistance QTLs, and the resistant resources found in various organisms besides rice. To develop SB-resistant rice varieties, it is important to develop and explore new resistant rice germplasms, fine map and evaluate resistance QTLs, and also to pay attention to various bio-resources showing resistance to R. solani.

关键词： rice sheath blight Rhizoctonia solani quantitative trait locus resistance

Maximum Entropy Spectral Estimation Based on Accelerating genetic Algorithm

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Maximum Entropy Spectral Estimation Based on Accelerating Ge...

2009中国控制与决策会议

作者： ZHANG Ming~(1,2),ZHANG Jian-yun~(2,3),JIN Ju-liang~4,WANG Guo-qing~(2,3),HE Rui-min~(2,3) 1.state key laboratory of Hydrology-water resources and Hydraulic Engineering,Hohai University,Nanjing 210098,china. 2.Research Center for Climate Change,MWR,Nanjing,210029,china 3.Nanjing Hydraulic Research institute,Nanjing 210029,china. 4.School of Civil Engineering,Hefei University of Technology,Hefei 230009,china.

＜正＞The purpose of this paper was to solve the problems of spectral peak shifting and line splitting existing in Burg’s Maximum Entropy Spectral Analysis method（MESA）,to enhance the resolution of entropy spectral,and to increase the adaptability of spectral estimation algorithm to signal length,signal noise ratio and initial phase.A method of accelerating genetic algorithm based maximum Entropy Spectral estimation method（GES） was proposed,where accelerating genetic algorithm was used to optimize the parameters of MESA and the four equivalent conditions of MESA were used as objective *** typical simulation cases indicated that the phenomenon of spectral peak shifting and line splitting were absent in the frequency spectral estimated by GES,and the ability to discriminate two closed frequency was *** with the traditional MESA methods,GES has good performances in signal processing.

关键词： maximum entropy spectral estimation Burg’s algorithm spectral peak shifting spectral line splitting accelerating genetic algorithm

Androgenetic haploid embryonic stem cells producelive transgenic mice

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Androgenetic haploid embryonic stem cells producelive transg...

2012全国发育生物学大会

作者： Wei Li~(1,2*),Ling Shuai~(1,3*),Haifeng Wan~(1,2*),Mingzhu Dong~(1,2*),Meng Wang~4,Lisi Sang~(1,2),Chunjing Feng~(1,2),Guan-Zheng Luo~4,Tianda Li~(1,3),Xin Li~(1,3),Libin Wang~(1,2),Qin-Yuan Zheng~(1,2),Chao Sheng~(1,3),Hua-JunWu~(2,4),Zhonghua Liu~2,Lei Liu~1,Rui Fu~1,Liu Wang~1,Xiu-Jie Wang~4,Xiao-Yang Zhao~1&Qi Zhou~1 state key laboratory of Reproductive Biology,institute of zoology,chinese academy of sciences,Beijing 100101, china.

Haploids and double haploids are important resources for studyingrecessive traits and have large impacts on crop breeding,butnatural haploids are rare in *** haploids arerestricted to germline cells and are occasionally found in tumourswith massive chromosome *** success in establishinghaploid embryonic stem(ES) cells in medaka fish and miceraised the possibility of using engineered mammalian haploid cellsin genetic ***,the availability and ftinctionalcharacterization of mammalian haploid ES cells are still *** we show that mouse androgenetic haploid ES(ahES) cell linescan be established by transferring sperm into an enucleated *** ahES cells maintain haploidy and stable growth over 30passages,express pluripotent markers,possess the ability todifferentiate into all three germ layers in vitro and in vivo,andcontribute to germlines of chimaeraswhen injected into *** epigenetically distinct fromsperm cells,the ahES cells canproduce viable and fertile progenies after intracytoplasmic injectioninto mature *** oocyte-injection procedure can alsoproduce viable transgenic mice from genetically engineeredahES cells,then can generate homogeneous transgenic mice bymating between the littermates of these transgenic mice. Conclusions:Our findings show the developmental pluripotency ofandrogenentic haploids and provide a new tool to quickly producegenetic models for recessive *** also shed new light onassisted reproduction.

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Simple Sequence Repeat （SSR） Analysis for Assessment of genetic Variability in chinese Chestnut Germplasm

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Simple Sequence Repeat （SSR） Analysis for Assessment of Ge...

2006中国植物细胞发育与分子生物学学术研讨会

作者： Ai Cheng-Xiang, Liu Qing-Zhong (Pomological institute of Shandong, key laboratory for Fruit Biotechnology Breeding of Shandong, Tai ? an, Shandong 271000, china)

＜正＞chinese chestnut （Castanea mollissima） is one of the important horticulture crops widespread in the world, and it has very high economic value. It is not only the important genetic resources of worldwide edible chestnut variety improvement, but also play a important role in the research of chestnut originality and evolution. It is of great significance in the worldwide chestnut resource protection and utilization and the important resources for the chestnut disease-resistant and insect-resistant breeding. This research intends to study the SSR （Simple Sequence Repeats） markers for chestnut, fifty SSR primer combinations, developed from chestnut SSR-enriched genomic libraries and BAC libraries of Cork Oak （Quercus variabilis Blume）, were tested for cross amplification with 89 chestunt germplasm accessions. Nineteen primer pairs amplified 24 polymorphic SSR loci useful for discriminating most chestnut cultivars, as well as for investigating patterns of variation in chestnut germplasm. Levels of polymorphism were higher than the levels described using other codominant marker systems （i.e., isozymes, RFLP markers）. Overall, 167 alleles were identified, and all but 18 accessions were unambiguously discriminated. genetic differentiation of native germplasm into traditional ecogeographical groups was low, with a high level of genetic identity （＞0.77） between the groups. However, neighbor joining cluster analysis of marker distances between cultivars reflected the complex history of chestnut domestication, producing groupings not evidently based on the geographical origin of the cultivars. Distant positioning of chinese cultivars on UPGMA and neighbor joining dendrograms supports the authors’ consideration of chinese chestnuts as subspecies, which will promote the acquaintance with the genetic resources of Castanea mollissima and provide the theoretical basic for the rational utilization and protection as well.

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歧口凹陷烷烃气碳、氢同位素特征及成因类型

天然气地球科学 2011年第6期22卷 1054-1063页

作者：国建英钟宁宁李剑王东良于学敏马卫中国石油大学(北京)油气资源与探测国家重点实验室北京102249 中国石油勘探开发研究院廊坊分院河北廊坊065007 中国石油大港油田勘探开发研究院天津大港300280

通过对天然气碳同位素、氢同位素和干燥系数关系的分析,划分歧口凹陷的烷烃类天然气成因类型,拓展研究区天然气勘探领域,明确今后勘探方向。歧口凹陷的烷烃类天然气包括生物气、生物—热成因混合气和热成因气3个大类,热成因气是凹陷的... 详细信息

通过对天然气碳同位素、氢同位素和干燥系数关系的分析,划分歧口凹陷的烷烃类天然气成因类型,拓展研究区天然气勘探领域,明确今后勘探方向。歧口凹陷的烷烃类天然气包括生物气、生物—热成因混合气和热成因气3个大类,热成因气是凹陷的主力天然气类型,其探明储量占总储量的95%以上。热成因气按母质类型又划分为陆相油型气和煤成气,油型气按成熟度分为低熟气、成熟气和高熟气,主要来自第三系湖相泥岩;埕海潜山天然气属于高熟煤成气,主要来自石炭系—二叠系煤系烃源岩。今后,歧口凹陷天然气勘探应坚持以中深层为主要层段,以潜山和深层碎屑岩为主要勘探领域,同时加强煤成气资源潜力的研究。

关键词：稳定同位素天然气成因类型歧口凹陷黄骅坳陷

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湄公河清盛站水文情势变化分析

水电能源科学 2011年第11期29卷 15-18,209页

作者：周婷于福亮李传哲柴增凯中国水利水电科学研究院流域水循环模拟与调控国家重点实验室北京100038

以湄公河清盛水文站为例,采用Mann-Kendall统计检验方法和Pettitt突变检验方法分析了1960～2003年径流量的变化趋势和突变点,基于水文变化指标,采用变动范围法定量评价了清盛站水文情势的变化程度。结果表明,清盛站年均流量总体呈下降趋... 详细信息

以湄公河清盛水文站为例,采用Mann-Kendall统计检验方法和Pettitt突变检验方法分析了1960～2003年径流量的变化趋势和突变点,基于水文变化指标,采用变动范围法定量评价了清盛站水文情势的变化程度。结果表明,清盛站年均流量总体呈下降趋势,枯季平均流量呈上升趋势,汛期平均流量呈下降趋势;径流系列基本未发生突变;1992年前后出现显著变化的水文指标有河流枯季月均水量、年均最小流量与出现时间、低流量谷底数与平均持续时间及流量平均变化率与逆转次数;河流水文情势整体属中度变化。

关键词：水文情势 Mann-Kendall统计检验 Pettitt突变检验水文变化指标变动范围法清盛站

水稻苗期耐低钾品种筛选及相关性状的QTL定位

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植物遗传资源学报 2019年第5期20卷 1262-1270页

作者：罗曦吴方喜林强连玲何炜谢鸿光陈丽萍朱永生魏毅东蒋家焕谢华安张建福福建省农业科学院水稻研究所福州350019 闽台作物有害生物生态防控国家重点实验室/农业部华南杂交水稻种质创新与分子育种重点实验室/福州(国家)水稻改良分中心/福建省作物种质创新与分子育种省部共建国家重点实验室培育基地/杂交水稻国家重点实验室华南研究基地/福建省作物分子育种工程实验室/福建省水稻分子育种重点实验室/水稻国家工程实验室福州350003

对159份遗传差异较大的水稻品种进行耐低钾筛选,根据综合指数筛选出18份耐低钾和10份低钾敏感的水稻品种。利用筛选得到的耐低钾水稻品种台农67和低钾敏感品种制西构建重组自交系,对耐低钾相关性状进行QTL分析和定位,共检测到27个耐低... 详细信息

对159份遗传差异较大的水稻品种进行耐低钾筛选,根据综合指数筛选出18份耐低钾和10份低钾敏感的水稻品种。利用筛选得到的耐低钾水稻品种台农67和低钾敏感品种制西构建重组自交系,对耐低钾相关性状进行QTL分析和定位,共检测到27个耐低钾相关性状的QTL,LOD值为2.52~9.23,可解释表型变异为2.22%~7.25%,其中贡献率最高的QTL是qKC-2,该QTL定位在水稻2号染色体上,可能是1个控制水稻钾含量的未知基因,可进一步通过构建次级群体对该基因进行精细定位和克隆。本研究中设计的Indel标记可快速筛选水稻育种材料中的耐低钾基因型,缩短育种时间,而且重组自交系中可以选出农艺性状好又耐低钾的株系直接应用于育种。

关键词：水稻品种耐低钾 QTL 综合指数