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While the gravel layer is thick, the occurrence and development of the boiling of sand correspond to the model of hemispheric bottom hole which cheek by jaw with upper clay band; While the gravel layer is relatively thin, the occurrence and development of the boiling of sand correspond to completely penetrating well model.

本文在分析总结前人对渗透理论和渗透变形以及渗漏探测方法的基础上提出了渗透变形的理论模型和渗漏探测的平面热源法，并将环境同位素和水文地球化学方法应用于堤坝基的渗漏分析评价。

While the gravel layer is thick, the occurrence and development of the boiling of sand correspond to the model of hemispheric bottom hole which cheek by jaw with upper clay band; While the gravel layer is relatively thin, the occurrence and development of the boiling of sand correspond to completely penetrating well model.

当砂砾石层较厚时，涌砂的发生、发展符合紧靠上覆粘性土层的半球形井底模型；当砂砾石层相对较薄时，涌砂的发生、发展过程符合完整井模型。

The occurrence and development of cucumber powdery mildew was investigated under simulated plastic tunnel condition. The forecasting models of disease occurrence on-set date and disease severity were established by regression, and their root mean squar error values were less than 2 and 6, respectively.

在室内人工气候箱内，通过人工接种和模拟高温高湿环境的方法研究了黄瓜白粉病的发生和流行趋势，采用SAS统计软件对试验数据进行相关和回归分析，建立了黄瓜白粉病始病期与流行程度的预测模型。

Modes of occurrence of trace elements in coals from representative coalfields in China It is the core of the dissertation to investigate the modes of occurrence of trace elements in coals from typical coalfields in China.

中国煤中大多数微量元素平均含量，与世界范围内煤中微量元素平均含量相比，基本在同一水平线上，中国煤炭利用造成的微量元素污染问题，主要是由于落后的用煤方式、累积效应及有害微量元素局部异常富集引起的。

This paper employs methods of literature and analysis of context, makes a research on the social and media background of the occurrence of British Football Fanzines. The findings are that the occurrence of British Football Fanzines is beneficial to delivering points of views, forming a unique fans distinction, and influencing other media.

为更好了解英国媒体发展史及英国足球发展史，本文运用文献资料法和内容分析法着眼于英国球迷杂志的诞生，探究其诞生的社会背景以及传媒背景，认为球迷杂志的诞生为发表观点提供平台，有助于形成独特的球迷特征，并对其他媒体产生影响。

According to expert analysis, the occurrence of fish floating head and adverse weather conditions have a close relationship (In addition, the occurrence of fish have been floating with the water quality of manure, fish have been closely related), in hot weather, low air pressurethe adverse weather, often hypoxic water, the fish floating head.

据专家分析，鱼发生浮头与不利的气象条件有着密切的关系（除此之外，鱼发生浮头还与水质过肥、鱼苗过密有关），在天气闷热、气压低、连日阴雨的不利天气，往往使水中缺氧，鱼儿浮头。

The paper has introduced general situation of summer forest fire's occurrence since 1965 in Daxinanling area,and analyzed both objective and subjective reasons for its occurrence,such as flammables,weather condition,circulation,exterior settings,and insufficient awareness,not strict enough of wild fire source control and so on.

介绍大兴安岭地区自1965年至今的夏季森林火灾发生概况。分析夏季森林火灾发生的客观原因有：林内可燃物状况、天气状况、环流状况、外部环境情况；主观原因有领导重视不够、对野外火源管理不严。

On the basis of referring the foreign and domestic literatures and systematically generalizing the former research results, firstly, from the adsorption gas, coal spontaneous combustion and the heat resolves, thesis analyzes the ignitable gas occurrence. Secondly, though the experiment station of coal spontaneous combustion, thesis obtains the critical temperature 60 ℃～ 100 ℃, splits temperature 100℃～ 150 ℃, the fission temperature 150℃～ 180 ℃ and the speed-up temperature 210℃～ 250 ℃ and ignitable gas release rules in the several temperatures sections according to the results. Finally according to fire resource and the catastrophe theory, ignitable gas explosion characteristic and the influence factors have been conducted of the qualitative investigation and the quantitative determination. The gas explosion control technologies are put forward. It has built the certain foundation for the effective prevention gas explosion accident occurrence.

本论文采用理论分析和实验模拟相结合的综合研究方法，首先从煤层吸附瓦斯、煤氧复合过程及煤高温热解三方面对采空区可燃性气体的产生进行分析；其次通过对大型煤自然发火实验测试台的应用，根据实验结果得到临界温度60℃～100℃、干裂温度100℃～150℃、裂变温度150℃～180℃和增速温度210℃～250℃等几个温度段的可燃性气体释放规律；最后根据爆炸引火源，结合瓦斯爆炸流变-突变理论，对可燃性气体爆炸特性及影响因素进行了定性研究和定量测定，提出瓦斯爆炸事故的控制对策，为有效预防瓦斯爆炸事故的发生打下了一定的基础。

Among these factors the effects of the Atlantic subtropical high on locusts occurrence are mainly caused by ground surface temperature that is affected by the Atlantic subtropical high in autumn and winter when the locusts live through and incubate; Therefore the occurrence, the development and the harmfulness of the locust as well as its amount of eggs and imagos are impacted.

其中大西洋副热带高压对我国东亚飞蝗发生的影响主要是由于影响了秋冬季节蝗卵孵化和越冬期间的地面温度，从而影响了蝗卵基数和蝗卵孵化为成虫的数量，进而影响着我国东亚飞蝗发生、发展、危害情况的变化。

It was shown that the frequency of occurrence and titres of AT1A-AAs increased significantly during the development of hypertension. In the four hypertensive groups studied, the occurrence of AT1A-AAs was most prominent in SHR, 2K1C and neural groups.

实验结果表明，在高血压发病过程中AT1A-AAs的阳性率和滴度均明显增加，在四种模型中，自发性高血压组最明显，2K1C和神经性组次之。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。