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In order to improve high energy laser beam quality,with the combination of theory and experiment,the far field focusing characteristics of different serrate type apertures were studied and compared with those of circular apertures.

为了提高高能激光系统光束质量，采用理论和实验相结合方法，对圆孔光阑和齿形切趾光阑的远场聚焦特性进行了理论分析和实验验证，并与圆孔光阑的远场衍射作了比较。

Methods seventy-two 15-week-old sd rats were divided into six groups,included control group and five ovariectomized model groups.the model groups were fed with different-dose lycopene［10,15,20 mg/］ for 12weeks.then related indexes including length bone mineral density,bone mineral,serum estradiol,sertum alp and uterus index were analyzed.results compared with model group,three different dose groups and nilestriol［1.05mg/］ group showed increased bone mineral density,bone mineral,serum estradiol and uterus index,but decreased serum alp (p.05).conclusion as a female sex hormone-like component,lycopene may ameliorate the bone quality and inhibit osteoporosis in ovariectomized rat.

将72只15周龄sd大鼠随机分为6组，空白组做假手术，其余5组做卵巢切除术，术后用药12周后处死，测定右侧股骨骨密度、骨矿含量、血清雌二醇、碱性磷酸酶含量及子宫湿重。结果番茄红素高［20mg/］、中［15mg/］、低剂量组［10mg/］、尼尔雌醇组［1.05mg/kg·bw］能对抗骨密度、骨矿含量、血清雌二醇的下降、血清碱性磷酸酶的升高，与模型组比较，p.05；番茄红素各剂量组、尼尔雌醇组能对抗子宫指数的减轻，与模型组比较，p.05。结论番茄红素可以改善骨质量，抑制大鼠去卵巢骨质疏松的发生。具有类似雌激素的效应。

By statistical significance test, the results of determination were compared with those of standard methods with no significant difference at 0.05 level.

通过对模型进行t-检验，在显著性水平大於0.05的条件下，其测定结果与标凖方法的测定结果对比，两者无显著性差异。

Through simulation, the performance of frequency meter is demonstrated. Compared with the cymometer of the main controller with MCU, the software design language is flexible, the hardware is simper and the speed is faster.

仿真与分析结果表明，该数字频率计性能优异，与单片机为主控器的频率计相比，软件设计语言灵活，硬件更简单，速度更快。

Secondly, the results of detecting simulant clinical specimens by PCR with or without pretreatment were compared with those by in vitro culture.

结果分枝杆菌纯菌悬液的PCR法和培养法敏感性皆为1 10^2个菌细胞／mL。

Compared with the existing finite element eigenanalysis method[8]for asymptotic fields near the crack tip, current method has the following several characteristics: The jump-off that educes the virtue work formula is different; when solving the characteristic formula with FEM, the form of the element is non-confirming element; the singular transformation technique is not used in the assumption of displacement fields surrounding the wedge tip.

该方法与过去的有限元特征分析方法[8]相比的显著特点是：导出虚功原理的出发点不同；有限元单元形式为非协调元；楔形体端部邻域内的位移场假定没有采用奇异变换技术。

Classifying by genetic distance, we selected 5 greatly fastgrowing families and 10 less fastgrowing families, compared with Slash pine, whose genetic gains of volume are 44% and 14% respectively, and with Mason pine , whose genetic gains of volume are 197% and 14% respectively.

对家系的遗传距离进行了聚类分析，确定了5个极速生家系、8个较速生家系，其材积增益与湿地松相比分别为44%和14%，与马尾松相比分别为197%和136%。

Test results show that with an SBR loading of 15%,CNTs loading of 2%,and sodium benzoate loading of 2%,the impact strength is improved by 120%,tensile strength is improved by 6%,elongation at break is improved by 55%,and flexural strength of the modified PP is improved by 20%,compared with pure PP.

结果表明：当SBR、CNTs和苯甲酸钠用量分别为15%、2%和2%时，改性后PP的冲击韧性提高了120%，拉伸强度提高了6%，扯断伸长率提高了55%，弯曲强度提高了20%。

PURPOSE: To assess the relative risks of acute, nonulcerative complications with recently introduced contact lens wear modalities (compared with the previously most common soft lens wear schedule), and to identify any other associated factors.

目的：为了评估近期推出的接触镜的急性、非溃疡性并发症的相对风险（与以前配戴最常用的软性镜头相比），并确定任何其他的相关因素。

Compared with monocrystalline silicon battery, with almost the same inversion coefficient polysilicon solar battery has relatively low cost.

与单晶硅电池相比，在转化率比较接近的同时，多晶硅太阳能电池的生产成本较低。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。