数据类型

This thesis discusses firstly the IGMP, describes the specification of the protocol and explains the differences between the three different versions of protocol. Then the RPF rule used by the router to forward multicast packets and the multicast forwarding tree are discussed. The process of building SPT and RPT is also illustrated. In this thesis, we also discuss the mechanism of Flooding and Pruning in Dense-Mode multicast routing protocol and the process of switch from RPT to SPT in Sparse-Mode routing protocol.

本论文讨论了实现IP组播的IGMP协议，对IGMP协议的协议规范进行了描述，并对IGMP三个版本的不同点作了详细说明；讨论了进行组播数据包进行转发的RPF基本原理、组播转发树的类型，并对SPT树和RPT树的建立过程进行了探讨；并分别对密集模式组播路由协议的扩散和剪枝机制、稀疏模式组播路由协议中的RPT树到SPT树的切换过程进行了详细的探讨。

The relative capacity of a comparably-sized bearing of other types can be obtained from the tables.

相对的身份是相对大中型轴承，其他类型的数据，可在桌子上。

Operational data needed for noise contour development includes aircraft type, runway use/direction of operations , flightpath identification, and time of day.

为噪音研究所提供的运行数据应包括以飞机类型、跑道运行方向、飞行轨迹、飞机识别标志和运行时段。

And straitened economic circumstances now could present new business opportunities to gangsters of all types. Annual statistics published on July 16th gave a glimpse of how the recession may influence crime: burglary was stable but pickpocketing had risen by a quarter and credit-card fraud was up.

并且，如今拮据的经济环境会给所有类型的歹徒提供新的商机。7月16日公布的年度数据让人们稍略一睹经济衰退可能会如何影响犯罪：入室行窃率基本保持不变，但是扒手偷窃率上涨了四分之一，同时，信用卡诈骗率上升。

That is, a write-once type recording medium can be used substantially as a data rewritable recording medium.

也就是说，写一次类型记录介质实质上能用作数据可重写记录介质。

A form of parity RAID in which all disks are assumed to be rotationally synchronized, and in which the data stripe size is no larger than the exported block size.

在该类型的阵列中，假定所有磁盘是同步旋转的，同时数据条带的大小不大于导出块的大小。

Based on the measured data of soil and water loss in the monitoring stations in different relief areas in Zhangjiakou, the spatial suitabilities of water and soil conservation measures were researched.

该文以张家口各个地貌类型区水土流失监测站实测数据为基础，研究了该区水土保持措施的空间配置的适宜性。

On the basis of the study of the earthquake psychological factors, the article explores the course of disaster psychology generation、 the factors of disaster psychological trauma、 the dynamic generated mechanisms of earthquake psychology and by using the data of Tangshan earthquake、 Xiuyan earthquake、 the Indian Ocean tsunami, the paper studies the relevance of earthquake and the psychological trauma and reveals the intrinsic link between earthquake disasters and disaster psychology.

在研究了地震灾害心理的影响因素的基础上，从时间进程、生成过程、影响因素三个方面探讨了地震灾害心理生成的动力学机制，并进一步分析了唐山地震、岫岩地震、印度洋地震海啸三次灾害的数据，对地震灾害同心理伤害的相关性进行了实证研究，揭示了地震灾害同灾害心理之间的内在联系和关系。(4)本文根据前述研究，结合地震灾害救灾实际，设计了地震灾害心理救助措施体系，提出了针对不同灾害心理类型的救助方法，最后讨论了我国开展灾

In other words, if the contract is untyped (Action ="*"), there is no way to build metadata for generic contract on the fly.

换言之，如果合同是无类型（行动=&*&，有没有办法建立在飞行一般合同的元数据。

Based on the investigated data,this paper analyzed it deeply as viewed from energy types and energy end-use types in villages of Huantai County,which is typical comparatively welloff countryside in Northern China.

该文根据实地调查数据，从能源品种和最终用能类型两个角度对桓台县农村家庭能源消费结构演变进行了深入分析。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。