物流对农业产业集群发展的影响研究

农业产业集群高效率生产的竞争优势需物流系统的支撑,物流对农业产业集群能够辐射的市场区域大小有很大影响,进行物流对农业产业集群发展的影响研究具有积极意义.对农业产业集群及其物流进行分析,并采用层次分析法分析物流各因素对农业产业集群发展影响的相对重要程度,结果表明物流的专业化程度是影响农业产业集群发展的首要因素.提出农业产业集群与第三方物流从战略适应和功能整合两个维度合作,从而加大第三方物流对农业产业集群发展的推动作用.     

专业镇ASP网络化制造系统研究

针对制造业专业镇的现状及其对信息化建设的需求,提出了基于应用服务提供商(Application Service Provider,ASP)模式的面向专业镇的网络化制造系统,构建了系统的体系和数据管理机制,最后给出了家具专业镇的ASP网络化制造系统的应用实例.     

陕西省农家小麦品种主要加工品质特性及其聚类分析

研究了测定了陕西省１３１个主要农家小麦品种的粗蛋白含量,籽粒硬度和全麦粉ＳＤＳ－沉淀值,并根据这３个品质性状,利用离差平方和法对供试品种进行了总聚类和分区聚类分析。总聚类分析中,供试品种被聚为４类。     

不同地径截干对旱冬瓜枝条萌发与穗条产量的影响

以3年生的旱冬瓜(Alnus nepalensis)实生苗为试验材料,以地径聚类分级的5个类群为变量,开展单因素的截干试验,了解截干对其枝条萌发相关指标和穗条产量的影响。结果表明,类群的平均1级分枝数、2级分枝数、有效分枝数和单株穗条产量分别为4.1~9.6、1.3~2.3、5.5~11.3枝/株和24~56条/株;类群间此4个指标具有极显著的差异(P0.01)。1级分枝的穗条产量占总产量的79.9%~94.6%,即穗条主要来源于1级分枝。随着地径增大,穗条产量也随之增加,当地径≥3.00 cm时进行截干,可极显著地增加穗条产量。因此,截干前培育壮苗促进旱冬瓜地径生长是提高其扦插穗条产量的主要途径之一。     

地域根植性对企业集群发展的影响

地域根植性是企业集群的重要特征, 根植性的强弱直接影响着企业集群的竞争力及其流动性。本文深入分析了根植性对企业集群发展的影响及其导致的效果, 并对基于根植性的企业集群培育策略提出了自己的一些思考。     

Polymorphism of storage proteins in accessions of pea wild taxa

Electrophoretic spectra of storage proteins in wild taxa of pea have been studied. Composition of protein bands essential for identification of biochemical markers of introgressive alleles with agronomic value has been described. Cluster analysis has been performed with use of the UPMGA algorithm. Two clusters have been determined on a dendrogram with high level of bootstrap index (BI = 99.3%). P. fulvum accessions I609881, I609885, 2523, and 6070 have been placed in different clusters. This fact points to heterogeneity of the species under study and possibility of interspecific introgressions during ancient times. Accessions of P. fulvum 2523 and 6070 have been characterized by a higher number of isoforms of convicilin. Differences between the accessions of P. fulvum should be taken into consideration during interspecific hybridization.     

Cortical neurons sensitive to combinations of information-bearing elements of biosonar signals in the mustache bat

The auditory cortex of the mustache bat, Pteronotus parnellii rubiginosus, is composed of functional divisions which are differently organized to be suited for processing the elements of its biosonar signal according to their biological significance. Unlike the Doppler-shifted-CF (constant frequency) processing area, the area processing the frequency-modulated components does not show clear tonotopic and amplitopic representations, but consists of several clusters of neurons, each of which is sensitive to a particular combination (or combinations) of information-bearing elements of the biosonar signal and echoes. The response properties of neurons in the major clusters indicate that processing of information carried by the frequency-modulated components of echoes is facilitated by the first harmonic of the emitted biosonar signal. The properties of some of these neurons suggest that they are tuned to a target which has a particular cross-sectional area and which is located at a particular distance.     

皖江城市带文化创意产业集群发展刍议

皖江城市带文化创意产业自上个世纪末以来发展势头良好,但与发达地区相比仍然有不小的差距,需要我们通过选择合理的发展策略来更好地发展：统一规划,合理布局,避免重复建设;依托区位优势,充分利用区域文化的资源;科学规划设计,根据现代产业集聚规律打造文化创意产业园区和产业集群;完善公共服务平台,打造创意城市,为创意产业发展营造良好的发展环境。     

中国水仙品种选育的初步研究

调查研究表明,平潭水仙具有生长健壮、花葶数多等特点.进行了优良多花株系选种,以鳞茎叶片生长量为依据,在试验统计的基础上提出翅仔钻仔的选留种指标。     

社会资本与集群中小企业融资便利——基于湖南汨罗再生资源行业数据的实证研究

以湖南汨罗再生资源行业企业集群的近200家企业为调查对象，考量集群企业社会资本的影响因子，结果表明，集群中小企业社会资本主要受企业家个人基本情况、企业的信用情况、企业的存续年数以及集群中小企业的合作程度等四个因子的影响。社会资本与集群中小企业融资的关系实证表明，社会资本对中小企业融资便利具有促进作用。     

巨峰葡萄开花前至落果期~(14)C—光合产物的运转分配及与落花落果的关系

在巨峰葡萄开花前,盛花期和落果期．将~(14)CO_2导入不摘心、摘心及花穗用GA_350mL／L,GA_350mL／L＋BA25mL／L处理结果枝花（果）穗的邻近叶中,然后测定新消各部位~(14)C—光合产物的放射性强度。结果表明：1．开花前和盛花期导入~(14)CO_2的两处理,表现出花穗邻近叶的~(14)C—光合产物的运输方向与落果期不同、开花前和盛花期~(14)C—光合产物主要供给花序生长发育,供给枝梢先端极少。而在落果高峰期则大量供应枝梢生长,仅少量供应果穗。2、初花期果枝摘心在落果期能显著促进~(14)C—光合产物运向果穗,同时表现营养生长受抑。3．盛花期用GA_350mL／L、GA_350mL／L＋BA25mL／L处理花穗,可促使~(14)C—光合产物大量运向果穗。     

The origin of galaxies and clusters of galaxies

Debate on how galaxies and clusters of galaxies formed has reached an interesting stage at which one can find arguments for quite different scenarios. The galaxy distribution has a complex "frothy" character that could be the fossil of a network of protoclusters or pancakes that produced galaxies. However, there are galaxies like our own that seem never to have been in a protocluster but are physically similar to the galaxies in dense clusters. Some clues to be assessed in resolving this dilemma are the possible existence of galaxy filaments, the relative ages of galaxies and clusters of galaxies, and the continuity between cluster and field galaxies and between galaxies and clusters of galaxies.     

基于三螺旋模型的潍坊市蓝色高端产业集群创新研究

分析了潍坊市蓝色高端产业群发展现状,潍坊市蓝色高端产业集群目前发展迅速,但其产品科技成果的转化率较低、产业创新能力不强、集群整体竞争力不高。基于三螺旋模型,构建了潍坊市蓝色高端产业集群创新体系,以期通过加强政府-集群-高校的协同发展,加快其创新发展。     

Outlier identification of soil phosphorus and its implication for spatial structure modeling

Outliers are classified as global outliers and spatial outliers. Up to now, there is little information about the outliers especially the spatial outliers and their influence on the spatial structure modeling of soil properties. A total of 537 soil samples were collected based on a 30 × 30 m grid in a permanent dairy farm in southeast Ireland. Graphic methods of histogram and box plot combined with Moran’s I were applied to detect the outliers of soil phosphorus (P). Sixteen outliers (5 global outliers and 11 spatial outliers) of soil P were found in the study area. Compared to the raw data, the data with global outliers excluded always had the larger global Moran’s I value indicating a stronger spatial autocorrelation. Clear spatial clusters (High–High and Low–Low clusters) were observed based on local Moran’s I. The High–High spatial clusters were located around the main farm yard and near the traffic route due to more intensive management by farmers. The Low–Low spatial clusters were mainly close to the river. For these areas, P fertilizer or slurry should be applied for healthy grass growth. The dataset with outliers excluded had a reliable semi-variogram model with a low nugget/sill ratio (32.4 %), which was closed to its corresponding transformed data (30.5 %). The cross-validation results revealed that the dataset without outliers had the strongest linear regression model (r = 0.768), indicating that the outliers played an important role in the spatial structure modeling.     

不同花穗整形方式对阳光玫瑰葡萄果实品质的影响

以3年生阳光玫瑰葡萄为材料,在花穗分离期分别进行留穗尖3 cm、留穗尖5 cm、留穗尖7 cm、间隔疏除小穗处理,以不修剪(CK-1)和去副穗及穗尖(CK——2)作为对照,研究不同花穗整形方式对阳光玫瑰葡萄果实品质的影响。结果表明:不同花穗整形方式均能不同程度提高阳光玫瑰葡萄单粒重与可溶性固形物含量,果形指数无差异。综合比较,留穗尖7 cm的穗重最大,可溶性固形物含量显著高于对照,固酸比较好。因此,留穗尖7 cm花穗整形方式可作为阳光玫瑰葡萄重要花穗整形方式。     

液态Ca50Zn50合金快速凝固过程中微观结构的演变特性

采用分子动力学方法对液态Ca50Zn50合金的快速凝固过程进行了模拟研究.并采用双体分布函数、HA键型指数法、原子团类型指数法(CTIM)和可视化等方法对凝固过程中微观结构的演变特性进行了分析.结果表明：由于Ca,Zn原子的半径差异较大,导致总双体分布函数的第1峰明显分裂成为3个次峰,随着温度下降,半径较小的Zn原子互为近邻的几率明显增加.系统中1551键型所构成的二十面体基本原子团(12 0 12 0)的数量占绝对优势,对非晶态结构的形成起主导作用.系统中基本原子团的中心原子主要是原子半径较小的Zn原子.具有短程序的基本原子团之间大多以共顶点(VS),共棱线(ES),共面(FS)和相互交叉(IS)的方式相结合,在凝固形成非晶态的过程中,基本原子团大多以相互交叉(IS)的方式相结合,最后形成各种不同尺寸的、原子结合比较紧密、结构比较稳定的较大团簇.     

Quantum solvation of carbonyl sulfide with helium atoms

High-resolution infrared and microwave spectra of He(N)-carbonyl sulfide (He(N)-OCS) clusters with N ranging from 2 to 8 have been detected and unambiguously assigned. The spectra show the formation of a solvation layer beginning with an equatorial "donut" of five helium atoms around the OCS molecule. The cluster moment of inertia increases as a function of N and overshoots the liquid droplet limit for N > 5, implying that even atoms in the first solvation shell are decoupled from the OCS rotation in helium nanodroplets. To the extent that this is due to superfluidity, the results directly explore the microscopic evolution of a phenomenon that is formally macroscopic in nature.     

农业产业集群的理论基础研究

国内外对产业集群的研究是从工业集群开始的。随着农业生产率的不断提高和现代化农业的发展,农业产业集群不断涌现,越来越多的学者将产业集群理论应用于农村区域经济发展的研究,但是,我国对农业产业集群理论基础的研究尚属薄弱。本文依据经济学经典著作,探讨了农业产业集群的相关理论基础。     

水、旱稻氮高效QTL定位及其表达的遗传背景效应研究

【目的】挖掘不同来源水、旱稻亲本的氮高效优良等位变异,研究氮高效QTL表达的遗传背景效应,为水稻氮高效QTL的精细定位和分子标记辅助选择育种提供理论依据。【方法】以旱稻IAPAR-9分别与水稻辽盐241和秋光杂交而创制的2个F7粳粳交重组自交系群体为试验材料,进行了水稻全生育期氮素利用率及其相关性状的QTL定位分析。【结果】在"IAPAR-9/辽盐241"重组自交系群体中检测出31个氮素利用率相关性状的QTL,分布于除第6、第7和第10染色体外的9条染色体上,氮素利用率相关QTL成簇分布区间有9个;在"IAPAR-9/秋光"重组自交系群体中检测出33个氮素利用率相关性状的QTL,分布于除第4和第10染色体外的10条染色体上,氮素利用率相关QTL成簇分布区间有7个。【结论】氮素利用率相关性状QTL的表达,受遗传背景影响较大。2个群体均检测到的氮素利用率相关性状QTL的成簇分布区间,即第2染色体上的RM3421—RM5404区间以及第8染色体上RM8264所在的相邻区间,可能对水稻氮高效分子标记辅助选择育种有重要利用价值。     

铁皮石斛规模化种植关键技术

铁皮石斛是一种名贵中草药材,因其繁殖率低、生长缓慢,难以实现规模化种植。作者通过为期8年的试验攻关,总结出铁皮石斛规模化种植各个阶段的关键技术：注重道地优异种质的鉴定与选择,以红皮居群或软脚类型为主;选择野生种质果实种子作组培外植体,继代增殖控制在6～8代以内;强化组培苗瓶中炼苗适应及出瓶假植驯化,培育壮苗;选择适宜的栽培方式和基质配方,移栽定植于每年3～5月或7～8月进行,大棚栽植密度为52.5万～60.0万丛/ha;科学肥水管理,及时摘除花芽,适时采收,合理加工。