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Experiments have indicated that these algorithms have well supported constraint treatments in the IVAE and realized the closer combination of the virtual and the real assembly processes.
      
The higher the IV of the species, the closer and more significant was the interspecific association.
      
The blastema was growing at a higher rate on tail fragments than on the head fragments and the growth rate was the higher, the closer the transection was to the head end.
      
We show that, the closer are the microlenses to the critical curve, the larger is the discrepancy between our results and those obtained previously with standard (linearized) allowance for the effect of a regular gravitational lens.
      
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The effects of repetitive cortical stimulation on the evoked potential have been investigated in encépale isolé preparations of cats and in rabbits anesthetized with a mixture of 1% chloralose and 10% urethane solution.The evoked potentials were recorded from the visual or auditory area of the cerebral cortex by an eight-channel electroencephalograph.Repetitive electric stimulation for three seconds was applied to a cortical point close to one of an array of the recording electrodes.Either depression or potentiation...

The effects of repetitive cortical stimulation on the evoked potential have been investigated in encépale isolé preparations of cats and in rabbits anesthetized with a mixture of 1% chloralose and 10% urethane solution.The evoked potentials were recorded from the visual or auditory area of the cerebral cortex by an eight-channel electroencephalograph.Repetitive electric stimulation for three seconds was applied to a cortical point close to one of an array of the recording electrodes.Either depression or potentiation of the evoked potentials could be produced,depending on the depth of anesthesia and the stimulus parameters selected. (1)The spreading depression.On strong stimulation the evoked potential,after a latent period of half a minute,was severely depressed for about two minutes and then began to recover.Before finally returning to the original magnitude the potentials might surpass the control size.The total recovery time lasted for about thirty minutes.The degree of the augmentation of the potential seemed to depend on the level of anesthesia.Changes in stimulus intensity and in depth of anes- thesia,however,showed no effect on the process of depression.The depression propagated in all directions of the cortex at a speed of 2—8 mm per minute.No interhemispheric propagation was manifested.The initiation of the depression wave could be prevented by local application of 10% procaine solution at the stimulating electrodes. (2)The poientiation effect.Under certain conditions,the evoked potential could be greatly potentiated immediately after repetitive electric stimulation.Potentiation seemed to be confined only o the vicinity of the point stimulated and lasted for no more than forty seconds.A prerequisite for the production of the effect of potentiation was the proper frequency of stimuli;the anesthesia,the intensity and the duration of the stimulating pulse were contributory factors. Since the potentiation or depression could be induced separately by appropriate treatment of the preparation and by proper selection of stimulus parameters,it is assumed that the mechanisms un- derlying the two effects are independent of each other.

实验在家兔(用氯醛糖和氨基甲酸乙酯混合液麻醉)和猫(施行“隔离脑”手术)身上进行。用多点记录法在动物皮层的视区或听区引出诱发电位后,即在某一记录点附近给以3秒钟的重复弱电流刺激,可以观察到两种不同的效应:(一)阻抑作用:始于刺激后的半分钟左右,诱发电位迅即被完全阻抑,2至3分钟后电位渐渐增大,并增大到超出刺激前的水平,以后才逐渐恢复正常。全部阻抑过程历时约30分钟。改变刺激强度或麻醉深度对阻抑作用的影响不大。阻抑以每秒2—8毫米的速度向四周扩散,但不向对侧皮层扩散。皮层局部用10%普鲁卡因涂敷后,电刺激就不能引起阻抑扩散。 (二)强化作用:在适当的刺激条件下,刺激后立即出现诱发电位的强化现象,其时程不超出40秒,以后紧随着就出现电位的阻抑作用。越接近刺激点,强化的效应就越大,但强化不向四周扩散。强化作用的出现主要取决于刺激的频率,其他如麻醉深度、刺激波宽和强度等都具有一定的影响。利用巴比妥钠和10%普鲁卡因可以使诱发电位的强化和阻抑现象分别地表现出来。由此推论,强化作用和扩散性阻抑的发生机制是不相同的。

Rate of photosynthesis and growth of Gracilaria verrucosa in different layers ofseawaters in Shanwei Wan was observed in our experiments in 1962 and 1980 respec-tively. The results obtained from these experiments are almost the same. 1. When the algae was reared near the surface layer of seawaters, the rate ofphotosynthesis and growth was fast. On the contrary if it was reared in the lower layerof seawaters, their rate of photosynthesis and growth was slow. 2. There is a compensation layer of the depth of transparency...

Rate of photosynthesis and growth of Gracilaria verrucosa in different layers ofseawaters in Shanwei Wan was observed in our experiments in 1962 and 1980 respec-tively. The results obtained from these experiments are almost the same. 1. When the algae was reared near the surface layer of seawaters, the rate ofphotosynthesis and growth was fast. On the contrary if it was reared in the lower layerof seawaters, their rate of photosynthesis and growth was slow. 2. There is a compensation layer of the depth of transparency in the sea waters.At this layer the amount of oxygen produced in the photosynthesis is slmost equal tothat consumed in the respiratory process of the algae. Below this depth of transparencyin seawaters, the growth of the algae nearly stopped. In order to get a good harvest in the artificial raft cultivation, Gracilaria shouldbe float near the surface of seawaters. If the transparency of seawater is high, thealgae should be cultivated on the ropes hanging from the raft to proper depth, thelength of the ropes should not exceed 1.5 meter.

本文报道了1962年和1980年两次在汕尾港进行江蓠在不同水层中的光合作用试验及生长情况观察的结果。两次试验的结果基本一致:(1)越接近海水表面江蓠的光合作用越旺盛,生长速度也快;越向水的深层江蓠的光合作用越差,生长速度也越慢。(2)海水的透明度深度似乎成了相抵深度,即在透明度深度的水层中江蓠光合作用产生的氧几乎等于江蓠呼吸作用所消耗的氧。在该深度以下的水层中,江蓠几乎停止生长。 在进行江蓠人工栽培的时侯,应考虑尽量采用浮筏式栽培,使江蓠藻体悬浮水面,可获得高产。在透明度较大的海区,可考虑采用垂下式浮筏栽培,但最好在水深1.5米以内,可望获得高产。

The results on 1st insemination with Lyghorn hens observed, (1)The shortest interval to ovulate a fertile egg was 25.33 hours, The longest was 139 hours, and the average was 49.15 hours.(2) The peak value of fertility could be reached on the next day after insemination and persisted to 82% till the seventh day.(3)The shortest was 21 days, and the average was 12.3 days, (4) when hens was inseminated with hard shell egg in utterus would affect the fertility of hens. The fertility of hens with a hard shell egg...

The results on 1st insemination with Lyghorn hens observed, (1)The shortest interval to ovulate a fertile egg was 25.33 hours, The longest was 139 hours, and the average was 49.15 hours.(2) The peak value of fertility could be reached on the next day after insemination and persisted to 82% till the seventh day.(3)The shortest was 21 days, and the average was 12.3 days, (4) when hens was inseminated with hard shell egg in utterus would affect the fertility of hens. The fertility of hens with a hard shell egg was 67.3%, while the control was 84.5%. (5)When a hen had a hard shell egg to be inseminated the nearer to ovulating, the lower the fertility, particularly within two hours before ovulation, 27% of the hens inseminated could not produce fertilized eggs. The fertility of the eggs produced by the rest of the hens was only 62.2%. In the group with a hard shell egg 4 hours before ovulation,the nonfertile hens reduced to 6%, and the fertility of the egg was 92.1% respectively.

本试验从来航母鸡一次输精后观察到:(一)产第一枚受精蛋最短时间为25.33小时,最长为139小时,平均为49.15小时;(二)输精后第2天受精率即达高峰,第7天仍达82.0%;(三)母鸡持续受精最短为3天,最长为21天,平均为12.3天;(四)输精时子宫有无硬壳蛋对受精率有影响。有硬壳蛋组母鸡受精率为67.3%,对照组(无硬壳蛋组)为84.5%;(五)输精时,子宫中有硬壳蛋的母鸡越接近产蛋,对受精率影响越大。2小时以内组,不受精母鸡达27%,73%的受精母鸡产蛋的受精率为62.2%,而4小时以上组,不受精母鸡为6%,相应受精母鸡产蛋的受精率为92.1%。

 
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