Motivated by this observation , this paper studies the problem of efficiently processing k nn k - ge 1 search on r - tree - like structures storing historical information about moving object trajectories . two algorithms are developed based on best - first traversal paradigm , called bfp k nn and bft k nn , which handle the k nn retrieval with respect to the static query point and the moving query trajectory , respectively . both algorithms minimize the number of node access , that is , they perform a single access only to those qualifying nodes that may contain the final result 例如，若已知动物的轨迹，则动物学家可能提出如下两种查询： i在时间区间ti , tj内找到离一个给定的静态点譬如食物源实验室等最近的k条动物轨迹ii在时间区间ti , tj内找到离一条预先指定的动物轨迹最近的k条动物轨迹。
Findings from the studies confirm bfp s beneficial effects and elucidation of possible mechanisms in seven key areas , including ( 1 ) having estrogen - like activity as well as the ability to modulate the levels of ovarian hormones , estrogen and progesterone ; ( 2 ) effect in treating dysmenorrhea ; ( 3 ) prevention in the development of hypertension ; ( 4 ) possible beneficial effect on reducing risk of cardiovascular diseases including thrombosis or stroke ; ( 5 ) effect on the immune system ; ( 6 ) improvement in digestion and bowel movement ; and ( 7 ) curative effect on chemically damaged liver 研究结果阐明，白凤丸有七大主要成效及可能的机制，包括（ １ ）产生类似雌激素活动及调节卵巢荷尔蒙、雌激素及黄体酮； （ ２ ）治疗经痛； （ ３ ）抗高血压； （ ４ ）可能减轻心血管疾病包括血栓形成或中风的风险； （ ５ ）调节免疫系统； （ ６ ）改善消化及肠道蠕动；以及（ ７ ）治疗化学受损的肝脏。
Estrogen plays an important role in overall bodily function and prevention of aging . based on findings from cuhk s research work , eu yan sang developed a new formula bfp , menoease . the new product s ability to restore estrogen production in the body , as well as its effect in a range of body functions suggests that it may restore nature s balance in the body , maintaining health and youth after menopause 雌激素在人体整体功能及预防老化上扮演重要的角色；根据中文大学的研究成果，由余仁生开发的新配方延采白凤丸能改善老年机体雌激素水平，其他身体功能亦可得到改善，故能助处于更年期的妇女保持健康及青春，恢复人体的自然平衡。
In this thesis , four types of steel beam - rectangular cfst column connections , including normal welded flange plate ( wfp ) connection , bolted flange plate ( bfp ) connection , stiffened end plate ( sep ) connection and double split - tee plate ( dst ) connection , were designed based on the configuration of steel frame connection . total 8 models , 2 models of each kind of connections were tested under low - reversed cyclic loading at the end of cfst columns . the relationships between force and displacement at the end of columns , the relationships between the moment and rotation of the joints , degradations of strength and stiffness , ductility , failure mechanism and failure characteristics of these four connections under different axial - compression ratios were presented 本文借鉴钢框架节点构造，设计了四种类型矩形钢管混凝土柱与钢梁连接节点，包括常规栓焊( wfp )节点、翼缘全螺栓连接( bfp )节点、双t板连接( dst )节点以及加劲端板连接( sep )节点，进行了四类节点8个模型试件在柱端低周反复荷载作用下的抗震性能试验研究，比较了不同轴压比下节点的滞回性能、强度与刚度退化、延性、破坏机理与破坏特征，主要结论有： 1 、节点的位移滞回曲线与转角滞回曲线为块型分布，没有或略有捏拢现象，耗能能力强； 2 、轴压比对节点滞回曲线有显著影响，全部节点都有显著的刚度退化； 3 、位移与转角骨架曲线在峰值荷载后有较长的水平或下降段，具有良好的延性性能； 4 、从整体抗震性能上看，翼缘全螺栓连接节点、双t板连接与加劲端板连接节点都优于常规栓焊节点，可在实际工程中加以推广。
Estrogen plays an important role in overall bodily function and prevention of aging . based on findings from cuhk s research work , eu yan sang developed a new formula bfp , menoease . the new product s ability to restore estrogen production in the body , as well as its effect in a range of body functions suggests that it may restore nature s balance in the body , maintaining health and youth after menopause 雌激素在人体整体功能及预防老化上扮演重要的角色根据中文大学的研究成果，由余仁生开发的新配方延采白凤丸能改善老年机体雌激素水平，其他身体功能亦可得到改善，故能助处于更年期的妇女保持健康及青春，恢复人体的自然平衡。
The three - year project , commenced in june 2000 , was undertaken by the epithelial cell biology research center ( " ecbrc " ) of cuhk . with a better understanding of the pharmacological actions of bfp through extensive research and laboratory testing , a new formula for treating postmenopausal syndromes was proposed and its toxicity and efficacy studied 该中心透过广泛的研究及实验测试，为白凤丸建立了药理基础，并从研究中提出治疗更年期综合症的新配方，及对新配方的药效与毒性进行了研究。
The integral seismic behaviors of other three kinds of connection , namely bfp , dst , and sep connections are better than that of normal wfp connection . by the way , finite - element ( fe ) analyses were conducted to predict the influence on cfst structure under different kinds of elements , mesh density , load manners and boundary conditions . after that , a special program was designed to define the constitutive relationship of concrete material in cfst structures based on apdl in ansys program 此外，本文探讨了不同的单元类型、不同的网格划分密度、加载方式与边界条件对钢管混凝土组合结构数值计算的影响，运用ansys中的apdl语言，编写了适合钢管混凝土结构分析的混凝土材料本构关系程序，并运用该程序结合ansys对常规栓焊节点与翼缘全螺栓连接节点的滞回性能进行了初步计算，为进一步地数值分析打下了基础。
Findings from the studies confirm bfp s beneficial effects and elucidation of possible mechanisms in seven key areas , including having estrogen - like activity as well as the ability to modulate the levels of ovarian hormones , estrogen and progesterone ; effect in treating dysmenorrhea ; prevention in the development of hypertension ; possible beneficial effect on reducing risk of cardiovascular diseases including thrombosis or stroke ; effect on the immune system ; improvement in digestion and bowel movement ; and curative effect on chemically damaged liver 研究结果阐明，白凤丸有七大主要成效及可能的机制，包括产生类似雌激素活动及调节卵巢荷尔蒙雌激素及黄体酮治疗经痛抗高血压可能减轻心血管疾病包括血栓形成或中风的风险调节免疫系统改善消化及肠道蠕动以及治疗化学受损的肝脏。
