苦楝树春季物候期特征及其与农业界限温度关系

根据广西 12个市县气象站对苦楝物候观测资料 (其中 2 4°N以北 4个点 ,2 4°N和以南 8个点 ,资料年限14年～ 19年 ) ,发现 ,各站苦楝春季平均芽开放期 (y芽开放 )、展叶平均始期 (y展叶始 )、开花平均始期 (y开花始 )与当地经度、纬度、冬季平均气温呈正相关关系 (r芽开放 =0 .85 * * ,r展叶始 =0 .86 * * ,r开花始 =0 .99* * * )。在广西 2 4°N及以南地区 ,用各站逐年 1月平均气温 (X1 1 )、≥ 10℃始日 (X1 2 )和头年≥ 15℃终日 (X1 3 )建立的苦楝物候期预测模型 :y1 芽开放 =87.995 - 0 .2 6 3X1 1 + 0 .16 3X1 2 - 0 .12 3X1 3(r =0 .5 5 * * * ,n =130 ) ;y1 展叶始 =74.95 3 - 0 .35 8X1 1+ 0 .2 15 X1 2 + 0 .111X1 3 (r =0 .70 * * *,n =130 ) ;y1 开花始 =46 .0 6 3 - 0 .2 6 7X1 1 + 0 .2 5 0 X1 2 + 0 .0 6 5 X1 3(r =0 .71* * * ,n =130 )。在广西 2 4°N以北地区 ,用各站逐年≥ 5℃初日 (X2 1 )、1月平均气温 (X2 2 )和头年≥ 10℃终日 (X2 3)建立的苦楝物候期预测模型 :y2芽开放 =87.2 0 4+ 0 .12 3X2 1 - 0 .2 16 X2 2 - 0 .0 5 X2 3(r=0 .5 0 * * ,n =6 9) ;y2展叶始 =80 .5 72 + 0 .12 6 X2 1 - 0 .334X2 2 - 0 .142 X2 3(r =0 .6 4* * *,n =6 9) ;y2开花始 =89.     

一维链状杂多化合物的水热合成及结构表征

利用水热合成方法制备了新颖的基于{Na[Mo6O12)(OH4)3(HPO4)(H2PO4))3]2}3-构筑单元的一维链状杂多化合物[DETA]4NaH2{Na[Mo6O12(OH)3(HPO4)(H2PO4)3]2}·8H2O(DETA=diethylenetriamine), 并用元素分析、IR、UV、TG及X-射线单晶衍射对其进行了表征. 该化合物属于三斜晶系, P-ī空间群, a=12.421 2(4)nm, b=12.5911(4) nm, c=13.078 2(4) nm, α=85.411 0(10)°, β=73.313 0(10)°, γ=82.276 0(10)°, V=1 939.63(11) nm3, Z=2, R1= 0.024 4. 杂多阴离子{Na[Mo6O12(OH12(OH)3(HPO4)(H2PO4)3]2}3-具有夹心结构, Na离子位于2个半单元[Mo6O12(OH)3(HPO4)(H2PO4)3]2-中心. 夹心型阴离子之间又以Na离子为桥形成了一维链, 并通过氢键作用形成了三维网状结构. 半单元[Mo6O12(OH)3(HPO4)(H2PO4)3]2-中, 6个MoO6八面体通过共边连接形成一个Mo6环,4个PO4四面体位于环的一侧.     

一维超分子化合物[(L~1)(H_4SiMo_(12)O_(40))]·8H_2O的合成、晶体结构及电化学性质

以有机胺分子丙二胺(L1)为配体,利用水热合成方法制备了一个新的基于Keggin型多金属氧酸盐阴离子[Si Mo12O40]4-的有机-无机杂化超分子化合物[(L1)(H4Si Mo12O40)]·8H2O(1),并通过红外光谱和X-射线单晶衍射方法确定了化合物的晶体结构.该配合物分子式为C3H30Mo12N2O48Si,三斜晶系,P 1空间群,a=12.8900(6),b=13.3870(6),c=13.5260(6),α=87.0260(10)°,β=88.6050(10)°,γ=88.2740(10)°,Z=2,V=2329.22(18)3,Mr=2041.64,Dc=2.888 g/cm3,F(000)=1896,μ=3.259 mm-1,S=1.077,R=0.0504,wR=0.1513.晶体结构分析表明,该化合物是由离散的多金属氧酸盐簇H4Si Mo12O40和丙二胺分子L1组成,两种组分间通过氢键作用形成一维超分子带状链结构.利用循环伏安法研究了目标化合物修饰碳糊电极的电化学行为及其对NO2-还原的电催化性能.CCDC:1040790.     

Si（^3Pg）＋CO（X^1∑^＋）体系的反应碰撞轨迹

使用经典轨迹法研究了平行络合反应Si(3Pg)+CO(X1∑+,V=0,J=0)→SiCO(X3Σ-)或SiOC(X3∑-)的碰撞轨迹.该两个络合反应均为无闽能反应,络合物SiCO和SiOC的寿命均大于2.0×10-12 sec,表现为长寿命络合物.     

过特定顶点集的S-圈与S-路

证明了下面两个结论 :(1)设G是k-连通的n阶图 ,k≥ 2 ,S V(G) .若对G[S]的任意 (k 1) -独立集X ,有 k 1i=1k i- 1k si(X)>n- 1,则G中有含S的全部顶点的圈 ;(2 )设G是 (k 1) -连通的n阶图 ,k ≥ 2 ,S V(G) .若对G[S]的任意 (k 1) -独立集X ,有 k 1i=1k i - 1k si(X) >n ,则对任意的 {u ,v}≤V(G) ,G中有含S的全部顶点的 (u ,v) 路 .其中 ,G是有限无向简单图 .X为G的 (k 1) -独立集 ,Si(X) ={v∈V(G) N(v) ∩X =i} ,si(X)=si(x) ,i∈ { 0 ,1,2 ,… ,k 1} .     

Fe2(Mo04)3/Si3N4复合粉末还原及热压微观组织结构分析

以α-Si3N4,Fe(NO3)3·9H2O和NH4Mo7O24·4H2O为原料,采用非均相沉淀法制备Fe2(M0O4)3/Si3N4复合粉末,采用氢气还原与热压法获得Fe-Mo/Si3N4复合粉末与烧结体,采用x线衍射仪(XRD)、电子能谱(EDS)、电镜扫描(SEM)和电镜透射(TEM)等方法对Fe-Mo/Si3N4复合粉末与烧结体物相、成分及微结构进行观察与分析.分析结果表明:Fe-Mo/Si3N4复合粉末主要成分为α-Si3N4,Mo,Si和Fe-Mo氮化物(Fe6M07N2和Fe3M03N),其中Mo颗粒长大;粒径为4-7 μm的Mo5Si3大颗粒均匀镶嵌在Si3N4,Fe-Mo氮化物(Fe6Mo7N2和Fe3Mo3N)及Si02的混合物组成的粒径为1 μm左右的小颗粒之中.     

配合物H2[Hbim]2[(bim)2Mo8O26]·H2O的合成新途径

以苯并咪唑和MoO3等为原料合成得到一个含有Mo—N键的新型配合物H2[Hbim]2[(bim)2Mo8O26].H2O(bim代表苯并咪唑),并通过红外光谱和单晶X-射线衍射等方法确定了其晶体结构.结构分析表明:该晶体属于单斜晶系,P2(1)/n空间群.晶胞参数:a=1.388 2(14)nm,b=1.392 7(14)nm,c=1.594 0(16)nm,α=90°,β=107.334(12)°,γ=90°,V=2.942(5)nm3,Z=2,R1=0.052 5.该配合物由苯并咪唑和[Mo8O26]4-配位形成主体结构,苯并咪唑通过Mo—N键直接与[Mo8O26]4-相连,周围质子化的苯并咪唑阳离子和游离的H 作为反荷离子平衡电荷.     

Na_(24)P_2Mo_(22)O_(83)的固相合成与表征

用固相反应法 ,由 Na4 P2 O7· 1 0 H2 O、Na2 Mo O4 · 2 H2 O和 Mo O3合成了新型杂多酸盐配合物 Na2 4 P2 Mo2 2 O83,其结构经元素分析、IR和 X-射线粉末衍射等分析手段确证 ,新配合物属正交晶系 ,晶胞参数 a =1 .4774nm,b =1 .1 896nm,c=1 .1 0 4 2 nm,属 D4 2 - P2 12 12 1(No.1 9)空间群     

中国产地钱Marchantia polymorpha L.的染色体核型分析

本文对中国东北地钱MarchantiapolymorphaL .进行了染色体核型分析。地钱的雌、雄配子体的染色体数目均为n =9,其中各具一条性染色体。按李懋学 (1985 )、Inoue(1983)及洪德元 (1998)的标准 ,雄配子体的核型公式为K(n) =9=Y 7m t,或K(n) =9=Y 7V m ,染色体相对长度组成为n =9=2L 2M2 4M1 S ,核型为“2A”型 ,染色体总长度为 16 .993μm ,雌配子体的核型公式为K(n) =9=X 7m t,或K(n)=9=X 7V m ,染色体染色体相对长度组成为n =9=L 5M 2 2M1 S ,核型为“2A”型 ,染色体总长度为12 .5 31μm。目前国内尚未见到地钱染色体核型分析的报道     

无机-有机杂化钼磷、钒钼磷多酸化合物的合成与结构

通过对V2 O5 ,Na2 MoO4·2H2 O ,HF ,Ni(NO3) 2 ·6H2 O ,H3PO4和吡啶体系水热反应的研究 ,合成并表征了无机 -有机杂多酸化合物 [C5 H6 N] 3[C5 H5 N][PMo12 O40 ] ( 1 ) ,[C5 H6 N] 4[PVMo11O40 ] ( 2 )和 [C5 H6 N] 4[HPV2 Mo10 O40 ] ( 3 ) .化合物( 1 )属单斜晶系 ,C/ 2c空间群 ,a =2 .1 867( 6)nm ,b =1 .3 978( 4)nm ,c =1 .663 3( 3 )nm ,β =1 0 5.73 ( 1 0 )°,V =4 .893nm3,R =0 .0 60 4 ,Z =4 ;化合物 ( 2 )属单斜晶系 ,C/ 2c空间群 ,a =2 .1 858( 4)nm ,b =1 .3 971 ( 3 )nm ,c =1 .663 5( 3 )nm ,β =1 0 5.83 ( 3 )°,V =4 .8873 ( 1 7)nm3,Z =4 ,R =0 .0 4 63 ;化合物 ( 3 )属单斜晶系 ,P2 1n空间群 ,a =1 .1 1 2 2 ( 2 )nm ,b =1 .94 1 2 ( 3 )nm ,c=1 .2 4 84 ( 3 )nm ,β =99.89( 3 )°,V =2 .6565( 9)nm3,Z =2 ,R =0 .0 690 .     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.