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1.
记述采自陕西及西藏地区网翅蝗科蝗虫二新种,即秦岭异爪蝗Euchorthippus qinlingensis sp.nov.及黑膝雏蝗Chorthippus fusigeniculatus sp.nov..秦岭异爪蝗近似于邱氏异爪蝗Euchorthippus cheui及绿异爪蝗Euchorthippus hebaceus,其区别于二者为:1)前翅缘前脉域具闰脉;2)前翅中脉域与肘脉域等宽;3)雄性尾须细长弯曲,超过肛上板顶端;4)雄性下生殖板长锥形,顶圆;5)后足股节上膝侧片黑色;而又区别于邱氏异爪蝗为:1)前胸背板沟前区侧隆线略弯曲;2)不具宽的黑色眼后带;而又区别于绿异爪蝗为雌性前翅前缘脉域具一白色纵纹.黑膝雏蝗近似于呼城雏蝗Chorthippus huchengensis及郑氏雏蝗Chorthippus zhengi,其区别于二者为:1)前胸背板侧隆线间最宽处为最狭处宽的2.4倍;2)雄性中胸腹板侧叶间中隔最狭处宽为长的1.6倍;3)雄性前翅中脉域宽为肘脉域宽的6倍;而又区别于郑氏雏蝗为:1)前胸背板沟前区与沟后区等长;2)后足股节膝部黑色.模式标本保存于陕西师范大学动物研究所昆虫标本室.  相似文献   

2.
记述了采自江西省的二齿蝗属一新种:江西二齿蝗Bidentacrisjiangxiensis sp.nov、,并与近似种厂东二齿蝗 Bldentacris guangdongensis Zhenget Xie,1986进行了比较。  相似文献   

3.
记录采自辽宁省千山地区蝗虫一新属及一新种,定名为千山辽秃蝗Liaopodisma qinshanensis zheng, gen. ef sp.nov.,该新属近似于印秃蝗属Indopodisma Dov.-Zap.和蹦蝗属Sinopodisma Chang,其区别于两者的特点为:复眼的垂直直径为眼下沟长的2.25倍;前胸背板沟前区长度大于沟后区长的1.3~1.37倍;雌性下生殖板后缘两侧凹陷,中央突出,顶三角形。  相似文献   

4.
记述采自贵州省小蹦蝗属一新种,即赤水小蹦蝗Pedopodisma chishuiensis sp.nov.该新种近似于佛坪小蹦蝗Pedopodisma fopingensis Zheng et Huo,主要区别为:1)复眼纵径为眼下沟长的1.4(♀)~2(♂)倍;2)前翅不到达中胸背板后缘(♂)或到达中胸背板后缘(♀);3)雄性下生殖板短锥形,顸尖;4)雌性下生殖板后缘中央具一个三角形突出.文中并附有中国小蹦蝗属分种检索表.模式标本保存于陕西师范大学动物研究所.  相似文献   

5.
中国蝗虫的新属和新种:(直翅目:蝗总科)   总被引:1,自引:0,他引:1  
在我国西北和西南地区,采得蝗虫1新属4新种,即新疆蝗属,新属Xin jiangacris gen.nov.,红胫新疆蝗,新种X.rufitivis sp. nov.,黑翅牧草蝗,新种Omocestus nigripenmus sp. nov.,宁夏蛛蝗,新种Aervopedellus nangxiaensis sp. nov.及武陵山金色蝗,新种Chrysacris wulingshanensis sp.nov.  相似文献   

6.
系统研究了原金蝗属在我国的种类,共计有10种,其中包括1新种,即红胫原金蝗Eokingdonella burrusitibia sp.nov.该新种近似于西藏原金蝗Eokingdoenlla tibetana(Mistshenko),主要区别为:1)前胸背板后缘中央浅凹陷;2)前胸背板沟前区长为沟后区长的1.5倍;3)后足股节内侧基1/3黄色,端2/3黑色;下侧基3/4红色,端1/4黑色4)后足胫节上侧红色,下侧黑色,基部具淡色环;5)后足跗节黄褐色.附有分种检索表.模式标本保存于陝西师范大学动物研究所昆虫标本室.  相似文献   

7.
记述了采自广西大青山地区斑腿蝗科二新属及二新种,即拟越蝗属Tonkinacrisoides gen.nov.,广西拟越蝗Tonkinacrisoides guangxiensis sp.nov.,皱蝗属Rugulacris gen.nov.及红胫皱蝗Rugulacris rubitibialissp.nov.模式标本保存于陕西师范大学动物研究所昆虫标本室.  相似文献   

8.
记述来自云南的拟裸蝗属Conophymacris Willemse 1933一新种:楚雄拟裸蝗Conophymacris chuxiongensis sp.nov,模式标本保存于山东大学生物系无脊椎动物标本室。  相似文献   

9.
沼泽蝗属Mecostethus Fieb.是蝗总科、斑翅蝗科中的一个小属,目前全世界已知有9种,主要分布于欧洲、亚洲东北部和非洲北部。栖息的环境多为沼泽地区或湿度大、植被覆盖度较高的地区。我国已知有4种。记述采自吉林省白城市的沼泽蝗属一新种,即白城沼泽蝗Mecostethus baichengensis sp.nov.,并与其近似种做了比较。模式标本保存于东北师范大学生命科学学院动物标本室。  相似文献   

10.
系统地记述了分布于我国小车蝗属的种类,共计有8种,其中有一新种,即二斑小车蝗Oedaleus bimaculatus sp.nov.,附有中国小车蝗属分种检索表,模式标本保存于陕西师范大学动物研究所。  相似文献   

11.
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.  相似文献   

12.
AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…  相似文献   

13.
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。  相似文献   

14.
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  相似文献   

15.
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  相似文献   

16.
17.
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.  相似文献   

18.
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).  相似文献   

19.
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.  相似文献   

20.
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.  相似文献   

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