查询词典 occurrence

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。

These data,especially the seiches with relatively large amplitudes,were examined by using statistics and natural period analysis.Basic chracteristics of seiches,such as monthly and annual occurrences,oscillation period, occurrence duration and occurrence time of the peak,were derived. Among these 20 tide-gauge stations...

结果表明，该海域主要港湾假潮出现具有明显的局地性、季节性和年际变化；夏季是大振幅假潮(振幅1 )≥ 80cm的多发期，冬季基本上不出现；龙口港湾的大振幅假潮最为突出，最大振幅可达 2 93cm ；气压和风速、风向突变的良好配合，是发生大振幅假潮的主要原因

Key factors affected wheat midge occurrence of Guanzhong district are the average daily temperature in January, the average daily temperature in March (X3), the average daily temperature in August of last year (X5) and precipitation in February (X8).Six prediction methods are selected to predict occurrence level of wheat midge.

本论文利用关中地区1933～2000年小麦吸浆虫的发生资料以及气象资料，通过逐步回归法筛选出了影响小麦吸浆虫发生的主要气象因子，即一月份平均温度(X_1)、三月份平均温度(X_3)、前一年八月份平均温度(X_5)、二月份平均降雨量(X_8)。

If you were not , and OS X just booted normally, have no fear.

如果你没有，和OS X刚刚启动通常，没有恐惧。

I only want to preserve our all .

我只想保存好我们的一切