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1.
本文记述了采自浙江古田山的螯蜂2新种:奥氏螯蜂Dryinus olmii sp.nov.和山单爪螯蜂Anteon montanum sp.nov.。  相似文献   

2.
本文记述螯蜂科单爪螯蜂亚科单爪螯蜂属四新种。模式标本存放于浙江农业大学植保系。  相似文献   

3.
本文记述采自福建武夷山的小腹茧蜂属Microgaster Latreille一新种,赵氏小腹茧蜂材Microgaster zhoi sp. nov.  相似文献   

4.
本文记述了泥蜂总科Sphecoidea短柄泥蜂科Pemphredonidae短柄泥蜂属Pemphredon Latreille一新种:赵氏短柄泥蜂Pemphredon chaoi Li et He,sp. nov. 模式标本保存在中国科学院动物研究所。  相似文献   

5.
罗庆怀  游兰韶 《武夷科学》2003,19(1):121-125
本文记述小腹茧蜂亚科Microgastrinae盘绒茧蜂族Cotesiini一新属新种。根据标本独特之处,命名为帽甲茧蜂属Caracallatus gen. nov.;为纪念我国著名昆虫学家赵修复先生,模式种定为赵氏帽甲茧蜂C. chaoi sp. nov.。详尽描述了属征和种征,并就其特殊的腹部背甲,初步讨论了该属在盘绒茧蜂族中的系统地位。为便于国际交流,英文摘要也较详细。模式标本采于贵州省惠水县,存放湖南农业大学昆虫标本室。  相似文献   

6.
记述了采自陕西的甲腹茧蜂属(Chelonus Jurine1801)二新种:1.大齿甲腹茧蜂Chelonus majusdentatus sp.nov.,与Ch.Subannulatus Abd,相似,但通过以下特征可以区分:触角28节;颊短于复眼纵径这半;径脉第一段与第二段相等,小脉从第一盘室基部1/3外发出;后足股节长为宽的4倍;产卵器长,伸出腹腔外,2.巨斑甲腹茧蜂Chelonus grandipunctatus sp.nov.,与Ch,obscuratus H-Sch1838相似,但有以下不同;颜面具有中纵脊;颊短于复眼纵径之半,上颊窄于复眼横径;腹部黄斑大、矩形;足的基节、转节、股节基部、后胫节端部均为红黄色,模式标本保存在陕西师范大学生命科学学院。  相似文献   

7.
中国琴螯蛛属首记及一新种(蜘蛛目:原蛛下目:狒蛛科)   总被引:1,自引:1,他引:0  
记述产于广西宁明县琴螯蛛属1新种,命名为桐棉琴螯蛛 Citharognathus tongmianensis sp. nov..模式标本保存在河北大学博物馆.文中测量单位mm.  相似文献   

8.
报道了伊朗膜翅目Hymenoptera 5个科,青蜂科Chrysididae、锤角细蜂科Diapriidae、螯蜂科Dryinidae、环腹蜂科Figitidae和细蜂科Proctotrupidae的区系调查。采集和鉴定了青蜂科的6属12种、锤角细蜂科的4属5种、螯蜂科的5属7种、环腹蜂科的4属5种和细蜂科的3属3种。  相似文献   

9.
绒螯蟹主要有新绒螯蟹属(Neoeriocheir)和绒螯蟹属(Eriocheir)两个有效属,新绒螯蟹属仅有狭颚绒螯蟹(N.leptognatha)一个有效种,绒螯蟹属有直额绒螯蟹(E.recta)和日本绒螯蟹(E.japonica)两个有效种,日本绒螯蟹有日本绒螯蟹指名亚种,日本绒螯蟹中华亚种和日本绒螯蟹合浦亚种3个不同的地理亚种.分布在我国大陆的是日本绒螯蟹中华亚种和日本绒螯蟹合浦亚种.中华绒螯蟹在我国大陆被按水系分成南方组与北方组,组内水系间为同种不同地理种群.利用RAPD等分子生物学技术,可以鉴别出中华绒螯蟹的中华亚种和合浦亚种,各种群间的鉴别还有待于进一步研究.  相似文献   

10.
绒螯蟹属的生物多样性   总被引:1,自引:0,他引:1  
就绒螯蟹的亚种、种及属的划分和界定进行了讨论 ,介绍了绒螯蟹属的研究简史 ,以及近几年在绒螯蟹可持续利用研究和该属通过形态学、生物化学和分子生物学手段在物种多样性和遗传多样性研究方面所取得的主要成就 .  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

13.
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   

14.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

15.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

16.
AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…  相似文献   

17.
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   

18.
In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.  相似文献   

19.
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-  相似文献   

20.
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-  相似文献   

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