中值

There were no significant between-group differences in the incidence of hypotension, absolute arterial blood pressure values (P = 0.73), predelivery median phenylephrine requirements (300[0-1000] in Group P versus 150 [0-850]microg in Group C, P = 0.24), or neonatal outcome as measured by Apgar scores and umbilical arterial and venous blood gas values.

而低血压的发生率、绝对动脉血压值(P = 0.73)、分娩前新福林需要量（ P 组需要量中位值300毫克（0－1000mg ）， C 组中位值150毫克（0－850mg ）， P = 0.24），新生儿出生后的 Apgar 评分以及脐动脉和脐静脉的血气分析均无显著差异。

This paper discusses some application cases of the error propagation law by the examples of trigonometrical survey, and presents that not only sum function and numeral multipling function in which there is only one independent observed value but also more complex functions which are equal in mathematics are not opposite in the process of error propagation according to the error propagation law.

1引言本文以三角测量为例，对误差传播定律一些应用问题进行了讨论，指出当只有一个独立的观测值时，和函数与倍数函数运用误差传播定律不会出现悖论；如果在测量工作中有多余的直接观测值，就需用平差后的间接观测值按协方差传播律来计算，这样数学中相等的函数关系才能得到同样的函

A high-speed digital-to-analog converter measurement method acquires and quantizes an analog ramp output by the DAC corresponding to a digital ramp input to produce a quantized ramp, determines a start and end of the quantized ramp, obtains a difference between the quantized ramp and an ideal ramp to produce a quantized periodic signal, determines a frequency for a qualified peak from an FFT of the quantized periodic signal, produces a mask filtered periodic signal from an iFFT around the qualified peak, and determines a sample window spanning a local maximum and minimum for each period of the quantized periodic signal.

一种高速模拟数字转换器测量方法，采集和量化由DAC输出的相应于数字斜坡输入的模拟斜坡以产生量化的斜坡，确定量化的斜坡的开始和结束，获得量化的斜坡和理想的斜坡之间的差值以产生量化的周期信号，从量化的周期信号的FFT中确定合格峰值的频率，从合格峰值周围的iFFT中产生屏蔽过滤的周期信号，并且在量化的周期信号的每一周期内确定跨越局部最大值和最小值的采样窗口。

The δ〓C values of cave pond and soil respired CO〓 become light with air temperature increasing, because organism activity is more intensive when temperature increase. 2. The temporal evolution of stable carbon isotope in karst cave system The δ〓C values of plants in October are heavier than those in July.

只有洞穴塘中水DICδ〓C值和月平均气温成相反的变化规律；土壤呼吸CO〓δ〓C值对月均温响应较为明显：月平均温度越高，土壤呼吸CO〓δ〓C值越偏轻，反映了温度较高的时候土壤层中的生物活动较强烈。

Good effect is obtained. The application of derivative sign binary algorithm in interference fringe skeletonizing overcomes the difficulty of threshold picking in ordinary binary methods.

导数符号二值图法在提取干涉条纹中心过程中的运用，克服了普通二值化方法中阈值难以选取的问题，提高了测量的精确度。

Two complemented lattices L_1, L_2 are said to be of the same "type" if they have identical sets of tautologies.

一个具有最小元O及最大元I的格L，如果在其中又定义了一个单值的1元运算&′&能适合O′=I，I′'=O，则称L为一可补格，一个命题演算良构式A(设只含命题连接词A，V，～)，如果命它的变数在L中任意取值且将A，V，～分别解释为L中的运算∩，U，′时，A永远得到值I，则称A为L上的恒I式，当两个可补格L_1，L_2上的恒I式集相同时，称L_1，L_2为同型的，本文就是讨论可补格按同型关系分类的问题，所得结果如下：定理设有限可补格L_2适合条件：，存在一良构式A能使则任一可补格L_1与L_2同型的一个充分必要条件是：(A_1)。

The results were as follows:Ascorbic acid decreased the stability of color of the anthocyanin solution and yangmei juice.

当杨梅花色苷溶液中加入50mg/L和100mg/L的抗坏血酸时，经70℃，5h热处理后，其花色苷含量分别为对照的70.7%和43.1%，Hunter A值分别为对照的76.2%和48.8%；杨梅果汁中加入50mg/L和100mg/L的抗坏血酸时，经70℃，5h热处理后，其花色苷含量分别为对照的78.8%和53.0%，Hunter A值分别为对照的63.1%和42.4%；在20℃下贮藏6个月后，其花色苷含量分别为对照的61.6%和37.3%，Hunter A值分别为对照的73.8%和49.2%。

A two-tier overlay network model is presented in this paper. Some consecutive nodes form an unstructured group and different groups are connected by a globally structured overlay with the Chord protocol. The model uses the Hilbert-based level search and the dynamic load balancing policy of a two-tier ring structure on top of the overlay network.This strategy has not only the characteristics of load balancing but also enough flexibility for searching.

Chord模型可以保证搜索系统中特定数据对象的跳跃次数在O的范围内，但只能根据数据对象的键进行准确匹配查询，不支持多关键字、部分关键字、通配符或是参数取值区间组成的复杂查询[1]；其次，相容散列的理论证明了当系统中有N个结点和K个键值的情况下，在每个结点上运行O个虚拟结点时，每个结点的键值范围可以无限趋于K/N。

The iodine value of milk fat usually varies between 28 and 40, the lowest value being observed with hard fat in the winter and the highest value with soft fat in.

乳脂肪的碘值在28—40之间变化，在冬季的硬脂中可测得最低碘值，在夏季的软脂中可测得最高碘值。

The results showed that mild alkali stress (pH 6.0~6.5) promoted plant growth, while severe high pH inhibited both seed germination, photosynthesis and root elongation.

结果表明：pH值过高会抑制种子萌发；随着pH值的逐渐增加，根的相对生长量和幼苗叶绿素含量均呈现先增加后减少的趋势；同时，根尖生长素含量随着pH值升高呈现先增加后减少的趋势，表明生长素含量变化可能在植物对碱胁迫的响应中，尤其是在根伸长过程中起着重要作用。

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。