查询词典 temperature gradient

Compared with the temperature of 25℃, the difference of the enzyme activity of SOD and POD, contents of PRO and REL of Festuca Lolium perenne L. and Cynodon dactylon at the temperature of 5℃ had been studied. The results showed that the 4 indexes above had less difference at the temperature of 25℃; after 20h treatment at the temperature of 5℃, the activities of SOD of Lolium perenne L.

用5℃低温处理黑麦草和狗牙根，并以25℃为对照，比较低温胁迫下，黑麦草和狗牙根超氧化物歧化酶、过氧化物酶、脯氨酸和电导率的差异，结果表明，25℃时上述5个指标差别不大，5℃处理20h时，黑麦草和狗牙根的SOD活性均达到峰值，分别为处理4h时的2.88倍和2.87倍，但24h后狗牙根的SOD活性减少速率明显大于黑麦草。

No-class-regulated was used to regulate temperature discretionarily during the service temperature range, and automatically maintain constant temperature, stabilizing with the temperature change.

在调温方式上采用无级调温方式，在调温范围内随意调节温度的高低，并且自动保持恒温，不随室温的变化而变化。

These advantages of EBW make its use expanding in the welding of titanium and its alloys.The microstructure and properties of TC4 alloy joints welded by the electron beam were investigated in this paper with room-temperature impact test, room-temperature tensile test, room-temperature notch tensile test, high-temperature tensile test, endurant tensile test, microhardness test and metallographic analysis.

本课题通过室温冲击、室温拉伸、室温缺口拉伸、高温拉伸、持久拉伸及显微硬度等力学性能试验和金相显微组织分析、断口扫描分析等，对TC4钛合金电子束焊接接头的组织和力学性能进行了分析和研究。

The partial least-squares regression model is built up to forecast crop leaf water potential of estival maize.Thirdly, atmosphere aspect, the low water age has been forecasting by R/S method of fractal theory in Si Chuan middle region. The chaotic behavior of agriculture meteorologic factors (average temperature, max temperature, min temperature, temperature of the earths surface, evaporators, precipitation, relative humidity, sunlight time) time series is investigated using the phase-space reconstruction technique, and the delay time and relation dimension and min embedding dimension and Lyapunov exponent and Kolmogrov entropy is calculated. The atmosphere water potential is calculated by surveyed data, and the day change law of atmosphere water potential and the relation between it and sun radiation has been discussed.

第三，关于大气方面，利用分形理论中R/S分析法对川中丘陵区的枯水年进行了预测；利用混沌理论的重构相空间技术，确定了农业气象因子(旬平均气温、最高气温、最低气温、地表温度、蒸发量、降水量、相对湿度、日照时数)的延时、关联维数、最小嵌入维数、Lyapunov指数、Kolmogrov熵，从而证明了以上各农业气象因子的时间序列具有混沌特性，为利用混沌理论预测各气象因子提供了科学依据；利用田间自动气象站的数据计算了大气水势并探讨了大气水势的日变化规律以及大气水势与太阳辐射的关系。

Installation hind is OK the special and effective high temperature that improves workshop is fuggy environment, can make the temperature inside workshop (the high temperature environment of 45 ℃ of 32 ～) drop quickly inside 10 minutes, maintain temperature in 26 ～ 30 ℃, this is the working environment with the easiest human body, can promote employee work efficiency, those who carry a product is high quality.

装置后能够特别有用的改良车间的温高凡热周围的环境，可使车间内的温度(32～45℃的温高周围的环境)快速地在10分钟内降低，且将温度维持在26～30℃，这是人身最舒坦的工作周围的环境，能够提高职工工作速率，维持制品的高品质。

Associated minerals are primary glauberite, halite and terrigenous mud; while calcite is absent or rare. The X-ray diffraction analysis shows that the mud-sized crystalline dolostone has an average CaCO3 mole content of 57.30% and an average degree of order of 0.40, revealing the characteristics of higher calcium content and lower degree of order. It is closely intergrown with glauberite, indicating that the aqueous medium in the depositional environment of mud-sized crystallinedolostone was hypersaline water or dilute brine. The temperature of water in the depositional environment calculated according to the oxygen isotope data averaged 30.5℃ and the minimum homogenization temperature of inclusions in primary glauberite crystals associated with mud-sized crystalline dolomite was 44℃. The two groups of temperature data are close, indicating that the temperature of the water in the paleolake environment during the deposition of mud-sized crystalline dolostone ranged from 30.5℃ to 44℃.

泥晶白云石在阴极发光下呈红色、橙红色，与其伴生的矿物除原生钙芒硝、石盐、陆源泥质外，方解石没有或极少；X衍射分析结果表明，泥晶白云石的CaCO3摩尔含量平均为57.30%，有序度平均为0.40，具高富钙、低有序的特征；与钙芒硝岩的紧密共生，说明泥晶白云岩沉积环境的水介质为高盐度的咸水或淡卤水；根据氧同位素数据计算的沉积环境的水体温度平均为30.5℃，与泥晶白云石伴生的原生钙芒硝晶体中的包裹体均－温度最低值为44℃，这两组温度数据基本接近，表明泥晶白云石沉淀时环境水体的温度大致在30.5-44℃之间。

Lactide, glycolide or caprolactone, biodegradable polyester and diisocyanate as materials are first bulk melt polymerized to prepare the degradable polymer with thermal deformation transforming temperature of about 37 deg.c. The obtained material is processed at temperature over melting temperature so as to shape into spiral rack, applied with stress at temperature higher than Ttrans to form shape easily operational handling and frozen to eliminate stress into the product.

本发明以丙交酯、乙交酯或己内酯，生物可降解聚酯及二异氰酸酯为原料，通过本体熔融聚合制备得到热致形变温度转化点在37℃左右的可降解高分子材料，将得到的材料在熔融温度以上进行加工、赋形制作成用于不同管腔内的螺旋管状支架；在T＞T trans 条件下施加应力，加工为便于手术操作的形状；冷冻定型消除应力，即得产品。

The test shows that the bed temperature is gradually reduced along the height of furnace in case of lower volatile matter content in the coal sort,but the temperature of returned material is obviously en- hanced;the bed temperature is entirely increased in the event of increasing the load,but the temperature difference be...

试验表明，煤挥发分含量较低时，床温沿炉膛高度逐渐降低，但返料温度明显升高；负荷提高，床温整体升高，但炉膛底部与中部的温差减小；一次风量增加，会导致烟气从密相区带走的热量大于燃烧放热而使床温降低。

Spectrometer was adopted to measure the emission spectrum of argon plasma jet at the ignitor exit; boltzmann curve slope method was applied to caculate the jet electron temperature; ionization equilibrium equation was used to caculate jet temperature and measured a law that length, electron temperature and jet temperature of ignitor exit jet length changed with arc current and flowrate.

采用光谱仪测量了氩气等离子体射流在点火器出口的发射光谱，利用玻尔兹曼曲线斜率法计算了射流的电子温度，并通过电离平衡方程计算了射流气体温度，测得了点火器出口射流的长度、电子温度和射流温度随弧电流以及流量的变化规律。

The thesis introduces the general engine development, domestic and foreign, analyses the present situation and future development trend of environment friendly lubricants, studies on theories of flow activation and low-temperature jellification which well illustrate the low-temperature property of environment friendly lubricants, researches the low-temperature flowability of environment friendly lubricants in perspective of molecule, then theoretically synthesizes plastic and flow principles of environment friendly lubricants and finally reaches a ground to explain low-temperature properties of environment friendly lubricants.

本文论述了国内外内燃机油的发展概况，分析了环境兼容润滑油的发展现状及趋势，研究了可以用于解释环境兼容润滑油低温性能的流动活化理论和低温成胶理论，从分子的角度研究了环境兼容润滑油低温流变特性，对润滑油的粘塑性流变机理进行了理论推导，找出了解释环境兼容润滑油低温流变特性的根据。

Bob Eckert has been chairman and chief executive of Mattel for eight years.

美泰董事长兼首席执行官鲍勃·埃克尔特在任已8年。

The outlook for honors and disgraces carries on and surpasses the traditional outlook for honors and disgraces theoretically, and carries on and develops the theory of construction of socialist mora...

社会主义荣辱观的提出在理论上是对传统荣辱观的一次继承和超越，是对社会主义道德建设理论的继承和发展，在实践上有利于形成良好的社会风尚。