单型的

The phylogenetic analysis of 22 ND4L sequences of Phocidae from GenBank showed that there are two clades (which belong to Northern Group and Southern Group) supported by relatively high bootstrap value and there are more closed relationship between spotted seal and harbor seal.17 haplotypes with 717bp were obtained from the mtDNA control region, adjacent proline and a portion of the threonine tRNA genes of 46 individuals.

利用从GenBank中下载的22个海豹科动物的ND4L基因序列的系统进化分析表明，海豹科动物分为南半球和北半球两大类群，斑海豹与港海豹为北半球种类，亲缘关系最近。从46个辽东湾斑海豹线粒体DNA控制区和苏氨酸及脯氨酸tRNA基因717bp片段的测序，得到17个单倍型。

Base on the summarization of the 50 years safety and high efficient coal mining achievements with hydraulic powered shield supports in Huainan coal mines the paper analyzed the rational layout of the gateway,optimized geometric parameters of thecoal mining face,improvement in potential,reform and invonvation,production process control,mien water and mine fire prevention and control,the siutbal conditions for the pseudo inclined coal mining with flexible shild support and other key technologies.

1概况1956年淮南煤矿先后试验了木结构的平板型、撬板形、"く"形、"人"形，钢结构的弧形、弓形、"く"形、"八"形等掩护支架，通过多次工业性试验并对所试验的掩护支架结构进行了一系列改革和完善，终于形成了目前所用的钢结构八字形掩护支架。以单腿支撑式掩护支架为例，八字形掩护支架是由钢梁、钢丝绳、垫板和绳卡、U形螺栓、扁铁、柱托、滑托板等组成。

An international advanced target tacking algorithm, which is an analytical trackingprocess based on the affine transformation model by simulating biological vision machinery, isalso introduced. And the mathematical denotation for the infinitesimal generator of affine Liegroup is deduced in this paper.

论文的主要工作包括： 1、介绍了靶场测量中火箭三维姿态的光学测量方法及其理论基础，着重对单相机测量滚转角的四区域轮廓螺旋线法进行了深入探讨和研究，对该算法进行了编程实现，利用仿真图和靶场某型火箭的数字图像对该算法进行了检测，对测量结果进行了精度分析。

So,lognormal distribution is not the well life distribution of thismaterial.

结果表明，通常采用的对数正态分布的理论失效率呈单峰型，与材料经验失效率的变化不相一致，因此对数正态分布不宜作为稀土钼铜合金球墨铸铁材料裂纹萌生寿命的概率分布。

Running at one megabit per second with Manchester encoding, this Ethernet standard operates on a baseband basis, providing for a single transmission at a time. Connection to the centralized hub is accomplished over UTP of 22, 24 or 26 gauge at distances of up to 500 meters in a star topology. Two pairs are used, with one providing upstream connectivity to the hub and the other providing downstream connectivity.

该以太网标准属于基带传输，单工工作方式。1Base-5与中央集线器的联接是通过UTP完成的，UTP的规格为22，24和26，采用星型拓扑，最大传输距离为500米。1Base-5使用2对UTP，1对提供与HUB的上行连接，另1对提供下行连接。

Adopting the conformal mapping or rotation axis etc complex methods which areoften used to treat with the hole or cavity problem,a two-dimensional cavity ofeither simply or multiply connected region is projected into the interior of acircle or an annulus.As well as the global coordinate system is turned into thelocal coordinate system.

采用处理孔口问题最常用的映射函数和移轴等复变函数方法，把复杂的单连通区域和某些复连通区域型二维孔洞转化为简单的单位圆内区域或圆环区域，把整体坐标转为局域曲线坐标，而，最终把问题简化归结为一组无穷代数方程组的求解问题。

By using center manifold theorem and normal form of maps, we also present formal proofs of the supercritical flip bifurcation at the bifurcation point. Above this threshold, there is a characteristic sequence of bifurcations, leading to chaotic dynamics, which implies that the dynamical behavior of the single species model with birth pulses are very complex.

利用单参数族映射的中心流形定理、正规型和指数积分函数的性质，得到了具非线性出生率或具密度依赖成熟率的混杂矩阵模型正平衡态的存在性和稳定性、超临界分支以及各种复杂现象甚至混沌。

Location-inventory system integrated design problem under stochastic demand The location-inventory distribution system design problem involving one supplier, candidate distribution centers and multiple retailers under normal distribution demand is studied in the background of building materials industry. Retailers adopt periodic reviewinventory policy, while distribution centers adopt continuous reviewinventory policy. Considering the trade-off between inventory cost, shipping cost and facility location cost, the integrated 2-echelon inventory control policies with incapacitated facility location model is presented.

随机客户需求下的选址-库存集成问题研究：以满足正态分布客户需求的型材配送物流为研究背景，研究了由单供应商、候选分拨中心和分销点构成的配送物流系统集成规划问题，分销点、分拨中心分别采用周期检查和连续检查库存控制策略，综合考虑库存成本、运输成本和设施成本之间的均衡关系，建立了二级库存控制策略与无能力约束选址集成规划模型。

In the second section, some analyses for large time behavior of the solutions of the models of scalar equation for reactors with periodic flow reversal are given by the maximum norm estimation of parabolic equations.

利用抛物型方程的最大模估计证明了单方程模型当关于单调递减时其对应的循环定态解的存在性，并且当时，模型解会趋于其对应的循环定态解。

The Mn is coordinated by four carbonyl O atoms from the DMF molecules and two phenolate O atoms of the picrate anions, forming a distorted octahedral structure.

在不对称单胞中存在着两种配位环境相同的Mn离子，四个DMF中的羰基氧原子和两个苦味酸根离子中的酚氧原子直接和Mn离子配位，形成了一个扭曲的八面体几何构型。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。