预试

The present work was de-signed to study systematically the changes of anther and pollen during themannitol pretreatment period on physiology and biochemistry;and then the ef-fects of mannnitol pretreatment on androgenesis and anther culture were stu-died.The donor plants used in this experiment grow in the field.

所以本文从以上几个问题出发，以大田生长的植株作为供试材料，首次系统地研究了甘露醇预处理过程中大麦花药花粉在生理生化方面所发生的变化；以及甘露醇预处理后对大麦雄核发育和培养效果的影响。

Though they speculate that among them is Assassins Creed 2, Mass Effect 2, A new Conker title, A rare shooter new franchise, and two new Halo titles.

发布会之后，微软会提供大量的游戏试玩版，还有四段下载内容的预览：GTA4 下载包、质量效应扩展包、Portal 2 以及免费的 Halo 3 地图包。

Y pretreatment on their leaves, the physiological effects of vitamin C, ethanolamine, cysteine, fucose and sodium benzoate were studied through design of randomized block and subordinate function values, and three best performance on improved its drought resistance chemicals were selected.

幼苗为试材，经叶片喷施药剂进行预处理后用PEG-6000溶液模拟水分胁迫，采用随机区组试验和隶属函数法，综合评价了维生素C、乙醇胺、半胱氨酸、苯甲酸钠和岩藻糖五种药剂对水分胁迫下香蕉幼苗叶片的生理影响，从中筛选出对有效提高香蕉抗旱性效应前列的三种药剂。

Cut flowers of Gypsophila paniculata with a blooming rate of 10%～15% were stored in dry or wet conditions under low temperature and subjected to pre-cooling or preservative treatment.

在低温条件下，以小花开放率10%～15%的满天星切花为试材，采取湿藏和干藏2种方式，结合预冷和保鲜剂处理，对切花贮藏时间和方式进行了研究。

The effects of beamforming algorithm of array with virtual elements based on linear prediction, on modified least squares estimator, and on time delay and summation are thoroughly studied via 1998's Songhua Lake experiment. The

分别应用基于线形预测的虚拟阵元波束形成算法，基于改进最小二乘估计虚拟阵元波束形成算法和延迟求和虚拟阵元波束形成算法，对1998年松花湖湖试数据进行了预成多波束处理，实验数据的处理验证了本文所提方法的可行性和优越性。

In this study, the aged watermelon seeds were selected as material, soaked by different concentrations of salicylic acid, calcium nitrate and gibberellic acid (GA3), to study the effects on germination rate, related physiological and biochemical indexes of aged watermelon seeds. The results show that the activity of aged watermelon seeds was obviously increased after soaking, and the best treatment to promote germination was Ca(NO3)210mmol/L. Besides, conductivity and soluble sugar content of seeds lixivium, and MDA content of seeds were decreased obviously after treated by SA, Ca(NO3)2 and GA3, and SA treatment had the best obvious effects.

本试验以自然老化的西瓜种为试材，采用不同浓度的水杨酸、硝酸钙、赤霉素预浸种处理，研究其对老化西瓜种子萌发及相关生理生化指标的影响，结果表明：不同处理均可显著提高老化西瓜种子活力，以10mmol/L的Ca(NO3)2处理促进萌发的效果最为明显；不同处理均能明显降低种子浸出液电导率、可溶性糖含量及种子中丙二醛含量，以水杨酸的各处理效果最好。

The fatigue life followed the logarithmic normal distribution or the two-parameter Weibull distribution by the probability regression method.

为研究预腐蚀对疲劳寿命的影响，进行30CrMnS iN i2A和LC4CS试件加速预腐蚀不同时间后的成组随机谱下的疲劳试验，采用概率回归方法对预腐蚀疲劳寿命分布特性进行检验，表明可采用对数正态分布和双参数威布尔分布描述疲劳寿命分布特性。

The effects of low temperature pretreatment and high temperature preculture on the anther culture of non-heading Chinese cabbage were studied, using hybrids '99H Qiu-25'×'99H Qiu-23' and 'Suzhouqing'×'SI' as material.

以不结球白菜杂种一代'99H秋-25'×'99H秋-23'和'苏州青'×'SI'为试材，研究了低温预处理和高温预培养对花药培养效果的影响。

In view of the concrete crack image characteristic, it emphatically discussed the recognition system three core issues. Firstly, it particularizes image preprocessing technology for reducing noise of concrete crack image. On the base of anglicizing the noise of specimen crack image and the characteristic of the noise , it propose the scheme that a hybrid filter will be used to reduce noise and introduce the principle of a hybrid filter.

随后，针对混凝土裂纹图像的特点，着重讨论了识别系统的三个核心问题：首先，详细讨论了对混凝土裂纹图像进行降噪的图像预处理技术，在分析了试件表明裂纹图像噪声的基础上，结合试件裂纹图像噪声的特点，提出组合滤波器的降噪方案，并介绍了组合滤波器的原理。

The experimental results show that the estimated strength of cylindrical specimens and core specimens taken from plate-like specimens under the condition of saturated surface-dry were good and the difference between the estimated strength and the measured strength is within 10%. For the plate-like specimens used in this study, measured the surface P-wave and internal P-wave, and investigate the difference between surface P-wave and internal P-wave velocities. Firstly, the internal P-wave velocity was recovered to the saturated surface-dry condition.

实验结果显示，350 kgf/cm2自充填混凝土及早强混凝土之圆柱试体及版试体所进行波速－强度关系曲线验证结果良好；而将圆柱试体及版试体套入粗骨材含量波速－强度关系式所得结果，其圆柱试体28天超音波强度预估差异约10%，显示试体28天处於面乾内饱和状态，以粗骨材含量配合波速量测来预估强度之结果良好。

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。