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constant temperature     
相关语句
  恒温
     CONSTANT TEMPERATURE AND FLUCTUATING TEMPERATURE EFFECTS ON THE DEVELOPMENT OF DIORHABDA RYBAKOWI WEISE Diorhabda rybakowi
     恒温与变温对白茨—条萤叶甲(Diorhabda rybakowi Weise)发育的影响
短句来源
     Constant Temperature Fuzzy Controller in Diffusion Stove
     扩散炉恒温模糊控制器
短句来源
     RaBA-SUPER CONSTANT TEMPERATURE CONTROLLING DEVICE
     RaBA—SUPER恒温控制仪
短句来源
     Temperature Distribution and Input Pipe Length in Constant Temperature Reaction Tank
     恒温反应罐流体输入管内温度分布与合理管长
短句来源
     Constant Temperature Traneformation Superplasticity of T8 Steel
     T8钢的恒温相变超塑性
短句来源
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  恒温条件
     The shelf life model of compressed biscuits made with optimized antioxidant without packaging was lnθ = 5025(1/T)-13.011 and the biscuits could be kept for 61.8 weeks under the condition of constant temperature of 20℃.
     添加复配抗氧化剂制成的无包装压缩饼干,其保存期模型为:lnθ=5025 1/T-13.011,在20℃恒温条件下可保存61.8周。
短句来源
     The shelf life model of vacuum packed compressed biscuits with aluminum foil composite film as packaging material (vacuum level was 0.08Mpa) was lnθ = 6685(1/T)-17.312 , and the biscuits could be kept for 243.5 weeks (approximately 4.7 years) under the condition of constant temperature of 20℃.
     以铝箔复合薄膜作为包装材料,同时采用真空包装(真空度为0.08Mpa)制成的压缩饼干,其保存期模型为:lnθ=6685 1/T-17.312,在20℃恒温条件下可保存243.5周(约为4.7年)。
短句来源
     In conditions of constant temperature of 28℃ and 32℃. the completion ofa generation takes 49.05±2.6 and 40.55±1.8 days respectively.
     在28℃和32℃恒温条件下,完成一代分别为49.05±2.6天和40.55±1.8天。
短句来源
     Under constant temperature 20 ℃,the critical photoperiod of Papilio memnon was LD 13 h 11 min∶10 h 49 min,under constant temperature 25 ℃,the critical photoperiod was LD 12 h 49 min∶11 h 11 min.
     在20℃恒温条件下,美凤蝶的临界光周期为LD 13 h 11 min∶10 h 49 min; 而在25℃恒温条件下,美凤蝶的临界光周期为LD 12 h 49 min∶11 h 11 min。
短句来源
     The effect of photoperiod on development,reproduction and flight capability of armyworm (Mythimna separata) was examined under five different treatments of short photoperiod (LD8∶16),median photoperiod(LD 12∶12),long photoperiod(LD 16∶8),generally decreasing photoperiod(from LD 16∶8 to 12∶12)and gradually increasing photoperiod(from LD 8∶16 to 12∶12)at a constant temperature in laboratory.
     在室内恒温条件下,测定了粘虫在短光照(LD8∶16)、中等光照(LD12∶12)、长光照(LD16∶8)、光照逐日由长变短(LD16∶8→12∶12)和逐日由短变长(LD8∶16→12∶12)等不同光周期条件下的发育进度、生殖力和飞翔能力。
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  恒定温度
     Using the method of transient capacitance at constant temperature, the shift of gold acceptor energy level in silicon under 〈100〉 , 〈110〉 , 〈 111〉 uniaxial press has been studied.
     用恒定温度下瞬态电容法研究了硅中金受主能级在沿〈100〉,〈110〉,〈111〉晶向单轴应力作用下的能级移动。
短句来源
     stress-strain under the condition of constant temperature (σ—ε)T;
     恒定温度下应力—应变测试(σ—ε)T;
短句来源
     The change trends of the combustion rates for the four coals under different constant temperature levels were predicted.
     用此模型预测了在不同的恒定温度下试验煤种的煤粉燃烧速率随燃烬度的变化趋势。
短句来源
     Conclusion The thermostat could maintain the constant temperature of EN fluid and prevent the occurrence of complications caused by EN fluid.
     结论 EN液恒温器能保证 EN液的恒定温度 ,避免 EN并发症的发生 ,提高 EN辅助治疗效果。
短句来源
     Then the suspension of PL was mixed with HA solution and the complex was obtained after stirring under a constant temperature for a definite time.
     即首先利用薄膜分散超声破碎法制备PL水分散液,然后与HA的水溶液混合,恒定温度搅拌一定时间得到复合物。
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  恒温温度
     The experimental data show that using solvent method can effectively produce nylon 1212 powder, and the optimal technological conditions are: nylon resin/solvent = 1/20, processing temperature being about 180°C , constant temperature time being about 8 hours.
     试验结果表明,采用溶剂法可有效地生产尼龙1212粉末,生产的最佳工艺条件为:尼龙树脂:溶剂=1:20,恒温温度为180℃,恒温时间为8h。
短句来源
     During the pyrogenation process of isothermal temperature,the TG curves of pine wood are very similar at the different isothermal temperatures,but the thermogrovimetric curves of constant temperature pyrogenation are smoother at the 200、250and 400℃ than at the 300 and 350℃.
     在恒温热解过程中,不同的恒温温度条件其失重曲线形态基本相似,但在200、250、400℃条件下恒温热解的热重曲线与300、350℃条件下恒温热解的热重曲线相比较较为平缓。
短句来源
     The relationship between the inhibiting scale ratio and the amount of copolymer,pH value,Ca~(2+) concentration,the temperature and the time of constant temperature,and Ca~(2+) tolerance at the different temperature have been investigated.
     主要研究该阻垢剂对含CaCO3模拟水的阻垢效果,分析了阻垢率与阻垢剂用量、pH、Ca2+浓度、碱度、恒温温度以及恒温时间之间的关系及不同温度下的钙容忍度的变化量.
短句来源
     The result shows that, through pyrolysis, the oil production of low oil content oil shale is the highest when the flux of carrier gas is 0.3slm at a constant temperature of 520℃ for 20 min;
     实验结果表明:低含油率油页岩热解获得较高产油率的较佳反应条件是热解恒温温度520℃、热解恒温时间是20min、载气流量0.3slm;
短句来源
     Thirdly best maintenance system is determined eventually: the constant temperature is 205 c, the constant pressure is 2 MPa, time of heating up is 3 h;
     并最终确定了最佳养护制度:恒温温度为205℃,恒温压力2MPa; 升温时间为3h;
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      constant temperature
    The performance of the catalyst prepared by adding the reductant at constant temperature of the solution is better than that prepared by adding it in the solution at 0°C and then heating it up to the reducing temperature.
          
    In contrast to [1] wherein it was assumed that a constant temperature is maintained on the free surface, it is assumed here that the fluid film is on the boundary with a gas jet which has finite specific heat and heat conduction.
          
    The article discusses the thermocapillary drift of a drop of a viscous liquid, filling the whole space, in another liquid, with a constant temperature gradient at infinity, in the absence of the force of gravity.
          
    The formulation and solution of the stationary problem of heat transfer in the neighborhood of the front point of a body at constant temperature in a stream of dissociated air are given in [1].
          
    The temperature difference is determined by the boundary conditions, namely, a constant temperature Tw ≠ T∞ on the surface of the sphere (VT/T ~ 1).
          
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    It may be a reliable and convenient way to ascertain the age of an armyworm mothaccording to the morphological characteristics of its reproductive system. The develop-ment of the reproductive systems in both sexes beginning from the prepupa stage wasstudied. Under constant temperature of 25℃, differentiation of the reproductive systemsin both sexes is completed on the fifth day of the pupal stage. However, the maturitystage of germ cells is different in both sexes. The spermatids are observable at thetime...

    It may be a reliable and convenient way to ascertain the age of an armyworm mothaccording to the morphological characteristics of its reproductive system. The develop-ment of the reproductive systems in both sexes beginning from the prepupa stage wasstudied. Under constant temperature of 25℃, differentiation of the reproductive systemsin both sexes is completed on the fifth day of the pupal stage. However, the maturitystage of germ cells is different in both sexes. The spermatids are observable at thetime of adult emergence, whereas the oocytes could ripen only after the female moth hadtaken proper food. The development of eggs in the adult ovarioles may be divided intofour stages: (1) transparent opalescent stage, (2) yolk deposition stage, (3) mature stageand (4) post-oviposition stage. These four different stages may serve as the stand-ards for age determination of the female moths. The phenomenon of coalescence of thetestes was observed in the male pupa. In the adult stage the volume of the testes gra-dually decreases due to the elimination of sperm bundles. After emergence there was nodistinct change in the external appearance of the male reproductive system of differentages, so that age determination in male moths was difficult.

    根据粘虫生殖系统发育过程中的形态变化来区分雌蛾的日龄,是较为可靠和方便的方法。我们从前蛹期开始,研究粘虫雌雄两性生殖系统发育的形态发生过程,在25℃恒温条件下,粘虫雌雄两性内生殖系统的分化在蛹期第五天基本上完成。而生殖细胞发育成熟的时期则雌雄各不相同,雄性精子在成虫羽化时便已发育完成,雌性卵子必须在成虫羽化取食补充营养后方能发育成熟。我俩将粘虫雌蛾卵巢的发育分为4个时期:即(1)乳白透明期,(2)卵黄沉积期,(3)成熟期,(4)产卵后期。卵巢的发育情况可以作为鉴别雌蛾日龄的标准之一。雄性粘虫的睾丸在蛹期有合并现象,井由于排精体积逐渐缩小。由于羽化后雄蛾的生殖系统外形上无特别明显的变化,所见较难判断它的日龄。最后比较了卵粒的发育成熟与咽侧体活动以及飞翔、交配、产卵等的关系。

    The present paper deals with the effect of high temperatures on the developmentand hatching of the eggs of the armyworm, Leucania separata Walk., at various relativehumidities. Results of the experiments may be summarised as follows: 1. Within the range of constant temperatures between 25--32℃, the percentagesof hatching are all above 90%, except those in relative humidity 22%. The percent-ages of hatching are not affected significantly by changing temperature, but are slightlyaffected by the...

    The present paper deals with the effect of high temperatures on the developmentand hatching of the eggs of the armyworm, Leucania separata Walk., at various relativehumidities. Results of the experiments may be summarised as follows: 1. Within the range of constant temperatures between 25--32℃, the percentagesof hatching are all above 90%, except those in relative humidity 22%. The percent-ages of hatching are not affected significantly by changing temperature, but are slightlyaffected by the change in relative humidity; the percentage of hatching decreases as therelative humidity decreases. When the relative humidity falls to 22%, its effect is mostsignificant. Under a very low relative humidity the decrease of the percentage of hatch-ing is probably due to the loss of water from the eggs. The rate of development ofeggs is accelerated as the temperature rises, but it is retarded as the relative humidityfalls. The effect of relative humidity on the rate of development increases as the tem-perature rises probably due to the rapid water evaporation in the low relative humidityat high temperatures. The increase in the rate of development is relatively great between25--29℃. At relative humidity above 60%, the egg development is at 32℃. 2. The upper limit of the optimal range of temperature for the development of theeggs is approximately at 31.0--32.5℃, while the lethal high temperature, taking LD_(50) asthe standard, begins at 32.0--33.5℃ in accordance with proper relative humidity. Whenthe relative humidity is below 63%, the limit will be at 32.0--33.0℃; and when therelative humidity goes above 63%, it lies at 33.0--33.5℃. Out of this limit, both thepercentage of hatching and the rate of development decrease rapidly. 3. At 35--41℃ constant temperatures, eggs are unable to hatch, but embryonicdevelopment goes on to various extents. The percentage of embryos able to proceed tothe larval form decreases wth the rise in temperature and the increase of exposing time,but increases slightly with falling relative humidity. At lethal high temperatures, satu-rated humidity becomes unfavorable for embryonic development. 4. The lethal effect of high temperatures on the eggs is the result of temperatureintensity and time of exposure; the higher the temperature, the shorter the time eggs canstand the situation. Between 37--39℃, there exists a sharp decline in the exposing time.The time for endurance at 37℃ is 9 times that at 39℃. This may be due to the rup-ture of the wax-layer in the egg chorion, which allows water to evaporate rapidly. Sincea short period (2 hrs.) of exposure to temperatures above 41℃ will cause a mortalityabove 95%, these temperatures may be regarded as the absolute lethal high temperatures. 5. Eggs that are at the stage prior to first zygotic division are less resistant to heatthan those that have their embryos with mid-gut and mouth-piece formed. Acclimatiza-tion to high temperature may increase the ability of resistance to lethal high temperature.The effect of lethal high temperatures on early embryos exhibits an after-effect.

    本文报导了几种相对湿度下25—46℃高温对粘虫卵发育与孵化的作用。卵发育及孵化的适温上限为31.0-32.5℃,其致死高温限为32.0-33.5℃。在25.0—32.0℃间,孵化率不因温度而有显著变化,发育速率则随温度升高而加快:湿度仅在大幅度下降时才对孵化率有显著影响,但对发育速率的影响则随温度增高而加大,在接近适温上限时湿度又成为决定卵发育与孵化的主要因素。高温的致死作用,因温度强度、处理时间及相对湿度而异。温度越高,忍受时间越短,41℃以上高温处理2小时,即使绝大部分卵死亡。高温下饱和湿度,对卵的发育与孵化不利。受精卵处于第一步分裂前期,抗高温能力较差。温度驯化略可提高卵的耐高温能力。文中还讨论了高温致死的原因及湿度的作用。

    The eggs of Locusta migratoria manilensis absorb a certain amount of water from the surrounding soil throughout their development, and then the water will be lost again as the soil moisture is very low. The rate of gain or loss of water is affected by temperature, being more rapid as the latter goes up. The susceptibility of eggs to desiccation in soil, taking percentage of hatching as a standard, varies with the stage of development of the embryos, being the least for newly-laid eggs, and the greatest for eggs...

    The eggs of Locusta migratoria manilensis absorb a certain amount of water from the surrounding soil throughout their development, and then the water will be lost again as the soil moisture is very low. The rate of gain or loss of water is affected by temperature, being more rapid as the latter goes up. The susceptibility of eggs to desiccation in soil, taking percentage of hatching as a standard, varies with the stage of development of the embryos, being the least for newly-laid eggs, and the greatest for eggs which have their embryos in the overwintering stage. The increase in susceptibility to desiccation which occurred in eggs in overwintering stage is related mainly to the increase in water content within the eggs, for instance, eggs that have absorbed water give normal percentage of hatching under 30℃ constant temperature with only 2.5 per cent of soil water content, while for the newly-laid eggs, 8 per cent of water content is needed as a minimum. The stage of development of embryos is also important in relation to the susceptibility of the eggs to high temperature. Eggs with embryo in revolution stage have proved to be more enduring than those newly laid ones. But such susceptibility is affected by the water content of the surrounding soil. For newly laid eggs, it increases with the slight increase of water content from 3 per cent to 16 per cent. For eggs in overwintering stage, it decreases as the water content rises from 16 per cent to 30 per cent. Thermal death point for eggs in overwintering stage has been found approximately at 55℃, while for the newly laid eggs is somewhere about 50℃. The upper limit of optimal temperature for the development of eggs found in these experiments is 41.5℃ and may be slightly varied with the changes of soil moisture.

    本实驗証明:蝗卵的耐干、耐热性能,常因胚胎发育阶段而異。已吸水的越冬卵,在30℃恆温下可以在2.5%含水量的土壤内正常孵化;未吸水卵在同样温度下,則需要土壤含水量在8%以上才能正常孵化。吸水卵在土壤含水量适宜的情况下,可耐受短期的高温(60℃);而未吸水卵只能耐受55℃以下温度的处理。二者发育的最高温度界限都在41.5℃左右,超越此限,蝗卵孵化率的递減梯度,除随温度上升的幅度而加大外,并与高温的持續时間和土壤含水量的变化有关。

     
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