桂林市污水处理厂污泥农业利用

桂林市污水处理厂污泥中有机质、氮、磷和钾等有益组分含量较高，而重金属等有害组分相对较低，基本符合国家污泥农用的有关标准。制成有机复合肥后进行的农用试验表明：污泥有机肥施用后水稻增产１３％～１９％，肥效略优于或等同于市场上出售的华丰牌复合肥；施用甘蔗后，产量比施用市场上出售的三元复合肥高２２％，比施用尿素、钙镁磷肥和氯化钾混合肥高２９％。     

泥炭对草坪生长综合作用的研究

在给草坪施用复合肥的同时,混施一定量的泥炭,试验结果表明,施用泥炭的草坪比单施复合肥的草坪,根系加长,分蘖增多,叶色浓绿,干物质提高,泥炭的施入增加了土壤中的有机质和养分含量,改善了土壤的理化性质。     

蕴丰硫基复合肥对温室葡萄产量性状及经济效益的影响

通过两年定位试验,在不施肥、传统施肥、推荐施肥和施用蕴丰复合肥等4个处理条件下,研究了蕴丰硫基复合肥对温室葡萄的产量及经济效益的影响.结果表明,蕴丰复合肥可显著提高温室葡萄的单穗重,产量及产值,分别较不施肥处理提高26％、49％和49％.蕴丰复合肥可显著提高肥料的产投比,较推荐施肥和传统施肥处理,两年平均分别高出12％和29％.蕴丰复合肥可以以较低投入获得较高产出,符合可持续农业发展需求,适宜在河西走廊温室葡萄中推广使用.     

覆膜与不同肥料对马铃薯生长和产量的影响

为给贵州马铃薯水肥一体化技术应用及高产栽培提供理论依据,以宣薯2号为试验材料,采用两因素完全随机设计,探究栽培方式与肥料互作对马铃薯生长和产量的影响.结果表明,覆膜极显著提高了马铃薯的出苗率,提高10.13%,显著提高了马铃薯株高,提高15.98%;施用复合肥时,覆膜栽培的株高极显著高于不覆膜,提高34.68%.覆膜极显著提高了单株中薯数和中薯质量;水溶肥显著提高了单株大薯数,极显著提高了单株大薯质量,不覆膜时效果更明显.施用复合肥时,覆膜显著提高了小区商品薯产量,提高20.38%;不覆膜时,水溶肥显著提高了小区商品薯产量,提高21.61%.结果显示,施用复合肥时,覆膜栽培优于不覆膜;不覆膜时,水溶肥优于复合肥.     

复合肥料中不同腐植酸质量分数对辣椒产量和品质的影响

在大田条件下，以常规复合肥处理为对照，探究质量分数2%、4%、6%、8%腐植酸的复合肥对辣椒产量和品质的影响，并在连作条件下探究腐植酸复合肥的使用效果，设置常规施肥与6%腐植酸复合肥进行连续4年对比试验。结果表明：腐植酸可显著提升辣椒的产量和品质，且综合提升效果与腐植酸质量分数成正比；综合效益、产量及各项品质指标，6%腐植酸复合肥为最佳处理，当年即较对照组增产14.07%；腐植酸复合肥可有效减少连作对辣椒产量和品质的影响，综合产量、品质降低幅度明显小于对照组；第4年，6%腐植酸复合肥处理较常规施肥增产达33.6%。     

棉花施用粉煤灰磁化肥效应方程及肥效研究

粉煤灰磁化复合肥是一种新型肥料 ,为探讨其对棉花产量的影响 ,我们在延津县潮土上进行了试验 ,粉煤灰磁化肥在棉花上一般用量为 92 1.38kg/hm2 左右。比等量N、P、K混合肥增产 15 .8%～ 18.4% ,增产134～ 16 7kg/hm2 ,最高产量施用粉煤灰磁化肥为 12 35 .85kg/hm2 。棉花产量为 1117.2 7kg/hm2 ;最佳产量施用粉煤灰磁化肥为 92 1.38kg/hm2 ,棉花产量为 10 96 .3kg/hm2 。     

化学肥料防结块研究与应用

在化学肥料储存过程中,由于产品中游离水含量和环境温度、湿度、压力等多种因素的影响,导致不同程度的结块,且随着时间的推移结块现象越来越严重,造成运输、施用不便和劳动强度增加.针对化学肥料的结块问题,研制了一种安全、环保、成本低的肥料防结块剂.在复合肥和碳酸氢铵单质肥中加入该防结块剂,试验结果表明,加入防结块剂后复合肥和碳酸氢铵中的游离水含量显著降低,与不加防结块剂的肥料相比,能明显降低肥料的结块程度,防止肥料结块效果显著.     

安吉农业面源污染治理填补空白

安吉县报福镇内有一条全长18公里的深溪河,流域面积42平方公里,河流两侧有成片农田1460多亩。据统计,农民每年在大田里施用尿素和复合肥有70吨,农药4.65吨,专家们测算约有60～70%流入河道。     

不同有机物料对铝毒土壤上油菜生长的缓解效应研究

利用盆栽试验研究了施用稻草和园林废弃物堆肥对铝毒土壤上油菜生长的缓解效应.结果 表明:对照铝毒土壤上生长的油菜遭受铝毒害明显,施用稻草和园林废弃物堆肥能不同程度地缓解铝毒害,其中又以稻草效果更好.稻草和园林废弃物堆肥施用可通过降低土壤交换性铝含量,提高土壤pH、叶片叶绿素含量、过氧化物酶和过氧化氢酶活性,从而提高油菜叶片光合速率和植株生物量.     

复合肥产业发展模式初探

通过对复合肥产业目前在工业生产与农业需求间矛盾、复合肥产品推广与反馈两个方面存在的问题分析,提出以农化服务为纽带,区域土壤定配方,作物营养求专用,生产中试再优化,试验示范调养分,专家服务建网络,高效安全加实用的中国复合肥产业良性发展模式。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

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…     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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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。     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

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