Decompositions for Relational Schema Under Null Value Circumstances Into BCNF With Lossless Joins

A polynomial time algorithm to decide BCNF

一个BCNF的多项式时间判定算法

The Separate Algorithm of Improved BCNF Based on Inverse Hypergraph

基于逆向超图的改进的BCNF的分解算法

Research on the Problems of Candidate Keys of the Relation Scheme in BCNF

属于BCNF的关系模式候选关键字问题研究

Applications of Closure Algorithm for Relation Decomposition Based on BCNF

闭包算法在基于BCNF的关系分解中的应用

The New Method for Decomposing a Relation Scheme into BCNF

关系模式的BCNF分解的一种新方法

Research on the Prime Attribute Problem of the Relation Scheme in BCNF

属于BCNF的关系模式主属性问题研究

Objective: To investigate the proliferation of three subtypes of odontogenic keratocysts ( OKC), namely simple ( not recurrent), recurrent and basal cell naevus syndrome ( BCNS) associated lesions.

目的：探讨基底细胞痣综合征的牙源性角化囊肿细胞增殖活性与临床生物学行为的关系。

According to the analysis about current problem of refrigeration system, the concept and application of BCNS basing on it technology is proposed.

通过对空调制冷系统存在问题的分析，提出了基于rr技术的网络中央空调概念和实施方案。

Male undergraduates scoring high than female both in AgC, AQ and BDHI, especially in body aggression;

大学男生在AgC变量、AQ问卷、BDHI调查表中得分均显著高于大学女生，尤其在躯体攻击方面；

BDMA comprises four phases of the system life cycle: build, deploy, manage, and audit.

BDMA包含系统生命周期的四个阶段：构建、部署、管理和审计。

Study on the properties of cured compound in bdma/ dicy/ ep system

苄基二甲胺/双氰胺/环氧树脂体系固化物性能的研究

Influences of Temperature and Composition on the Curing Mechanism in BDMA/ DICY/ DGEBA System

温度和组成对苄基二甲胺/双氰胺/环氧树脂体系固化反应历程的影响

Bio-enhanced activated carbon ( BEAC) is a kind of advanced drinking water treatment process, which fixed the isolated bacteria on activated carbon. The use of BEAC has become a matter of concern to many researchers, because it can improve organic pollutants removal efficiency.

生物增强活性炭技术（Bio-enhanced Activated Carbon，BEAC）将筛选出的优势菌群固定在活性炭载体上，用于饮用水深度处理，可以增强对有机物的降解效能、提高降解速率，因此受到广泛关注。

Come up with an improved routing protocol BEAC, which allows for residual energy and location information of sensor node while choosing cluster nodes.

提出了初步的改进协议BEAC协议，该协议在LEACH协议的基础上进行了改进。在选择簇头节点时考虑节点剩余能量及位置信息。

Effect of Backwashing on Dominant Microorganism Stabilization of BEAC Filter Controlled by the Biological Factors

生物因子控制反冲洗对BEAC滤池优势菌稳定性影响研究

Effect of Ozonation Process on BEAC Filter Stability Operation

臭氧对BEAC工艺稳定运行的影响研究

In this thesis, the advantages and disadvantages of the current prevalent congestion control algorithms are discussed in detail. Based on some general AQM algorithms such as RED, REM, RED/ ECN and RED/ BECN, an improved congestion control scheme is proposed.

本文在对当前几种流行的主动队列管理算法&RED，REM，RED/ECN以及RED/BECN进行详细的分析基础上，总结出当前拥塞控制算法的优势和不足，并提出了一种更优化的解决方案。

Backward ECN ( BECN) suggests a congested router to directly return the congestion information to the sender through ICMP source quench ( ISQ) messages to reduce the reaction time to congestion.

其中，后向显式拥塞指示（BECN）建议拥塞的路由器直接把拥塞信息通过ISQ返回给发送端，以减少对拥塞的反应时间。

Backwards Explicit Congestion Notification ( BECN) Rm-cell may be generated by the network or the destination.

后向明确拥塞通知（BECN）源管理（RM）信元可以由网络或目的设备生成。

The characteristic relations has becn developed and it is very suitable to use the Courant difference method with the guarantee condition of convergence.

经特征变换后，采用收敛和稳定性均有保证的Courant差分格式进行数值计算，克服了对称差分格式在处理线路边界条件时的困难。