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We choose the arid land of northwestern China as our study area because of its extensive area, specific geographical location, dry climate, varied topography, vulnerable ecosystems and long-term human disturbance, as well as the existence of current conflicts between economic development and environmental protection. Based on the literature, we choose ten desert species with clear and relatively accurate geographical distribution ranges to model their distributions:Anabasis brevifolia, Atraphaxis frutescens, Calligonum mon-golicum, Ephedra przewalskii, Gymnocarpos przewalskii, Haloxylon ammodendron, Haloxylon persicum, Ka-lidium cuspidatum, Salsola laricifolia, and Sympegma regelii.
:选择面积广阔、地理位置特殊、气候干旱、地形地貌多样、生态系统脆弱以及人类活动长期干扰,而且目前面临着西部大开发和环境保护双重矛盾的西北干旱区作为研究区域,通过收集西北干旱区多种优势种和常见种的地理分布资料,选取10种分布范围相对明确、资料相对齐备的荒漠植物种:短叶假木贼、木蓼(A- traphaxis frutescens)、沙拐枣、膜果麻黄、裸果木、梭梭柴、白梭梭、尖叶盐爪爪、松叶猪毛菜(Salsola lar- icifolia)和合头草,定量分析其地理分布与气候因子的关系,并据此估测其潜在中心分布区和潜在最大分布范围,与实际分布范围进行比较。
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First, the velocity and temperature data were collected in the period of simulation using three-cup anemoscope and hygrothermograph in different heights. Then Monin-Obkhov wind and temperature vertical profile were fitted by applying least square solution. Temperatures of different time in specific point were measured. Firsthand information in land surface was collected and anthropogenic heat profile of different time was investigated.
首先,利用在不同高度上面设立的三杯风速仪和温湿度计收集了两个计算模拟时段的风速和温度资料,然后采用最小二乘法拟合得出Monin-Obkhov风温廓线;在区域内布点测量不同时段的温度值,收集地表的一些原始资料;调查区域内的不同时段的人为产热分布。
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TPS the throttle valve position perceptron, this equipment might provide accelerator's immediate material to come with material and so on speed by engine revs to make the comparison judgment at that time engine's load conditions, adjusted engine's ignition angle of advance, obtained the good combustion efficiency, obtained the high power, and could achieve the province oil the effect, but the cost more then CDI .
TPS节流阀位置感知器,此装置可以提供油门的即时资料来跟引擎转速等资料作比较判断当时引擎的负荷状态,调整引擎的点火进角,来获得较佳的燃烧效率,获得较高的动力,并能达到省油的效果,但是成本比CDI来的高。
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The regression equation can describe well the change of standard deviation of relative radiation error with solar zenith angle, standard deviation of height, and resolution of digital elevation model. The result demonstrates that it is necessary to consider terrain complexity when using moderate resolution of remotely sensed data.
利用拟合方程可以计算任意地形条件下,不同分辨率的卫星资料在不同太阳天顶角情况下,不考虑地形复杂性产生的平均地表入射太阳辐射的计算误差,结果表明,使用中分辨率的卫星资料计算地表太阳净辐射时,需要考虑地形复杂性。
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Monitoring data and records of measurements; anonym zed data from health surveillance; relevant scientific and technical literature ; standards established by European or national standardization bodies
监测资料与量测纪录;卫生监测资料;相关的科学与技术文献;由欧盟或国家标准机构订定的标准
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Monitoring data and records of measurement s; anonym zed data from health surveillance; relevant scientific and technical literature ; standards established by European or national standardization bodies
监测资料与量测纪录;卫生监测资料;相关的科学与技术文献;由欧盟或国家标准机构订定的标准
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Results:Of all 47 case with simple ovarian cysts, 35 were hardening to treat through anterior approach.
本文借助于47例卵巢单纯囊肿经CT引导下的介入治疗资料,对入路方式和治疗效果进行探讨。1资料
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The authors use the anthropometry data of the Third National Nutrition Survey in China, and select the adult above 20 year old as the study subjects in order to study the relationship between BMI and blood pressure value and to provide some reference data for defining the suitable BMI cut off point of overweight and obesity in Chinese adult.
利用 1992年全国营养调查中的体格测量资料,选取 2 0岁以上的成人作为研究对象,探讨我国成人体质指数的分布状况及与血压的关系,并拟为确定我国居民的适宜BMI参考值提供一定的参考资料。
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Based on the former studies, this paper promotes an innovation about this topic using new satellite altimetry data and hydrographic data along with numerical experiments: Firstly, the temporal variation of the deformation of Kuroshio accompanied by the periodically shed anticyclonic eddies from the Kuroshio bend is discovered; Secondly, the major mechanism of the anticyclonic eddy separating from the Kuroshio bend, which is the frontal instability, is brought forward and then proved; Thirdly, the factors with important impact on the periodical variation of the Kuroshio bend and the eddy shedding, which are the strength of the Kuroshio transport and the circulation in the winter SCS, are determined.
本文在前人工作的基础上,利用了最新的卫星遥感资料和海洋调查资料,通过数值模式的数值实验,得到了以下前人没有得到的创新成果:发现在吕宋海峡处黑潮的形变随时间变化,并伴有反气旋涡周期性地从黑潮主体中脱落;提出并证明了吕宋海峡黑潮锋附近的锋面不稳定是反气旋涡从黑潮弯曲中脱落的主要机制;确定了对黑潮弯曲周期性变化以及反气旋涡脱落有重要影响的物理因素是黑潮流量的大小及冬季南海局地环流。
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Materials and Methods 41 cases of aldosteronoma (or aldosterone-producing adenoma, APA) were analyzed retrospectively.
资料和方法回顾性分析41例醛固酮瘤病例的临床资料,包括临床诊断、术前准备及手术方式等。
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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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。
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The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.
聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力