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To study the ecophysiological effects of low temperature stress on podocarpus fleuryi Hickel seedlings, two-year-old seedlings were selected as experimental material. We conducted comparative study. On the one hand, seedlings were separately placed in the plots located at the top, half-way-up and the foot of Jinyun Mountain (different altitudes at Jinyun Mountain led to the difference in air temperature) and subjected to winter low temperature stress. On the other hand, in laboratory, seedlings were exposed to simulated low temperature stress which were artificially controlled .

为了探讨低温胁迫对长叶竹柏幼苗的生理生态影响,本试验选取长叶竹柏的二龄幼苗为试验材料,在试验方法上采取了对比研究方法:一方面,利用缙云山不同的海拔造成的温度差异,分别将幼苗置于山顶、山腰和山脚下三个样地中,进行野外冬季自然低温胁迫处理;另一方面,在实验室中,利用人工控制的不同低温进行模拟低温胁迫处理。

Using the principle of superposition ,a simplified computational method of mass concrete surface temperature change,the lowest temperature value and temperature stress is provided when the temperature drops quickly.

采用叠加原理,研究气温骤降时,大体积混凝土表面的温度变化、最低温度值和温度应力的简化计算方法。

Based on the technique of radiate temperature measurement, the author designs a circuit of prismatic decomposition colorimetric radiate temperature measuring. A high resolution A/D converter and measurement range switch technology are adopted to resolve the problem that it has lower radiation power and lower signal sensitivity in the low-temperature stage, while higher signal amplitude and higher need of dynamic range in the high-temperature stage. The technique of the Black Body Furnace demarcates, digital calibration and the quartic curve fitting are applied to correct the sensor and improve its measurement precision.

3研究了辐射温度测量技术,设计了棱镜分光比色辐射温度测量电路,使用高分辨率A/D转换器和量程切换技术解决低温段辐射能量小、信号灵敏度低,而高温段信号幅值大,动态范围要求高的矛盾,应用黑体炉标定技术和数字校准方法以及4次拟合校正技术提高温度测量精度。

The work had been carried out can be summarized as follows: 1. Thermal cycle analysisBased on the classical thermodynamics, influence of isobaric reheat and isovolumetric reheat on cycle output is discussed. Based on the finite time thermodynamic theory, the thesis discusses the optimization of Rankine cycle, Brayton cycle and Stirling cycle between constant temperature heat source and constant temperature heat sink or between variable temperature heat source and constant temperature.

第一、循环优化分析:采用经典热力学研究了等压再热与等容再热对循环功的影响;采用有限时间热力学深入研究了恒温热源一恒温冷源和变温热源一恒温冷源液氮发动机朗肯循环、布雷顿循环和斯特林循环的优化和对比;着重研究了工质导热率与热机换热器总导热率之比对循环性能的影响、高温侧换热器导热率与低温侧换热器导热率之比对循环功率的影响等内容;得到了一些对循环和系统设计具有现实指导意义的结论。

The CO2 uptake rate of plants is affected by the plant species and environmental conditions such as photosynthetically active radiation, temperature, water and nutrient contents. PAR is the most immediate environmental control on photosynthesis while air temperature affects both photorespiration and dark respiration. In the natural condition, PAR and temperature play an important role in net CO2 uptake. The effects of PAR and air temperature on the CO2 uptake of Pterocarpus macrocarpus grown in a natural habitat were studied in the present work. Due to many uncontrollable factors, a simple rectangular hyperbola could not represent the measured data. The data were divided into groups of 2℃ intervals; CO2 uptake in each group may then be related to PAR by a rectangular hyperbola function. Using the obtained functions, the effect of PAR was removed from the original data.

用涡度相关法对亚热带红壤丘陵区人工针叶林的二氧化碳、水、热通量进行了观测,重点分析了23m、39m两层高度的观测结果,同时把观测期分为春季和冬季两个不同时间段作了对比:结果表明,不管冬季还是春季,39m高度所测的总通量值和夜间通量值都要小于23m的观测值,这种通量差别表明:23m高度的观测结果更接近当地生态系统与大气之间的通量交换值,在此种生态类型条件下用涡度相关法测碳通量时,在23m、39m两层高度之间仍然存在大气平流现象;该试验区植被在冬季仍然可以进行光合作用,而且光合作用所吸收的CO2大于呼吸作用所排放的CO2,因此该种生态系统在冬季仍表现为碳汇;春季的碳通量值为冬季的2倍以上。

Two kinds of thermal residual stresses exist in metal matrix composites. One of them is temperature gradient induced thermal stresses caused by temperature gradient in MMC. The other can develop upon cooling from the processing temperature to room temperature due to the coefficient of thermal expasion mismatch between the fiber and matrix and is called CTE mismatch induced thermal stresses.

金属基复合材料有两种形式的热应力,一种是在MMC中由于温度梯度引起的热应力,即温度梯度诱导的热应力;另一种是在冷却过程中由于基体金属和纤维的热膨胀系数不匹配引起的热应力,即热膨胀系数不匹配诱导的热应力。

Is a mass series production of automotive sensor and automotive devices specialized low-temperature start-up enterprises, the introduction of Germany core technology to produce low-temperature start-up automotive devices, isothermal section, and Fan Motor Dual temperature switch, oil pressure alarm switches, temperature sensors, reversing lamp switch, oxygen sensor, etc., series of more than forty kinds of products.

济南鲁德极光汽车零部件有限公司是生产大众系列汽车传感器及汽车低温起动装置的专业化企业,引进德国核心技术生产汽车低温起动装置、节温器、风扇电机双温开关、油压报警开关、温度传感器、倒车灯开关、氧传感器等七大系列四十余种产品。

Temperature parameter was modified in revisal coefficient model of temperature by the size of difference in air temperature, and light-temperature productive potentiality in various parts of physiognomy was calculated.

依据气温差异的大小对温度订正模型中的温度参数加以修正,计算出不同地貌部位耕地的光温生产潜力。

Based on the overall temperature monitoring for frozen soil embankment with riprap slope protection and without riprap slope protection in Qingshuihe test section of Qinghai-Tibet Railway,the ground temperature,accumulated temperature and the maximum thawing depth variation in temperature field of these two kinds of embankments were analyzed.

通过对青藏铁路清水河试验段片石护坡、无片石护坡的冻土路堤和地基的温度进行的全面监测,对比分析了路堤体内及基底的地温、积温及温度场中最大融化深度的变化情况,结果表明,采用片石护坡措施的试验路堤,与对比段相比,降温效果明显。

Effects of dry temperature and dry time on properties of heat cured sand and the relationship with binder composition are as follows:sands bonded by binders that are not modified have high strength when dry temperature is high and dry time is long,but their anti-wettability power is poor . Sands bonded by binders that are modified by B but not modified by M can be dried quickly and sand strength is high but anti-wettability power is also poor. Sands bonded by binders that are modified by M but not modified by B can also be dried quickly to obtain maximum strength,then the strength becomes lower when they are dried continually for more time. and sand strength is high but anti-wettability power is also poor. Sands bonded by binders that are modified by M as well as by B at the same time can be dried quickly to obtain maximum strength at low temperature and short time. But the anti-wettability of sand mold is best when they are dried at high temperature and long time.

烘干温度和烘干时间对热硬砂性能的影响及其与粘结剂改性的关系是:未经改性剂B和改性剂M改性的粘结剂砂,脱水速度较慢,烘干温度越高,时间越长,则硬化强度也越高,但未经改性的粘结剂热硬砂的抗吸湿性较差;经改性剂B而不经改性剂M改性的粘结剂热硬砂,烘干硬化速度较快,强度也高,但在高湿度下的抗吸湿性不好;经改性剂M改性而不经改性剂B改性的粘结剂热硬砂,烘干时强度先随烘干时间升高至最大值后,继续烘干时强度又出现下降;经改性剂B和经改性剂M共同改性的粘结剂热硬砂能在短时间和较低的烘干温度下就可烘干到最高强度,即烘干脱水的速度较快,但试样的抗吸湿性差,若在更高温度和更长时间下烘干,试样的抗吸湿性得到改善,综合考虑烘干强度和抗吸湿性要求,对于φ30×30mm试样,理想的烘干温度是200℃,烘干时间20分钟。

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相关中文对照歌词
Temperature
Highest Niggaz In The Industry
That's What We Came Here For
Take My Temperature
Glory In The Highest
Nothing To Fear (But Fear Itself)
Check Yo Temperature
The Highest
Temperature
Temperature Rising
推荐网络例句

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上,利用各种方法求得各种逻辑型、结构型控制器,解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面,有讨论,工程理事会和联盟关于延长工作时间短至9月底。

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