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the optimal time
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  最优时间
     The optimal time control on series capacitors is studied.
     研究了串联电容器的最优时间控制。
短句来源
     The main results are the solvability of the problem P_h and its explicit expressions of the optimal time and the optimal control.
     我们采用转换的方法给出了最优时间与最优控制的具体表达式.
短句来源
     As a concrete example,the optimal time expression of the elastic vibration system has been derived for the first time.
     作为实例,第一次导出了弹性振动系统最优时间的明显的表达式。
短句来源
     Further more, selection of time steps in the algorithm is also discussed, and the optimal time steps are proposed and verified.
     同时还对刻蚀算法中的时间步长选择问题进行了讨论,从数值计算的角度提出了最优时间步长的概念并加以验证。
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     The Way to Calculate the Optimal Time Control of the Double Integrating System
     关于双积分系统时间最优控制中最优时间的计算方法的推导过程
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  最佳时期
     4 The R_1 stage was the optimal time to spraying SHK-6 on soybean.
     4SHK-6在大豆上使用的最佳时期为R1期。
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     The result showed that the optimal time for isolating microspores was approximately 7 days before or after the first flower emergence. Yield and doubling efficiency were significantly higher than the control when the isolated microspores were treated by NLN-16 with the addition of 50mg/L or 75mg/L colchicine.
     结果表明:小孢子培养的最佳时期为初花期前后2周左右,游离小孢子经过含有50mg/L或75mg/L秋水仙碱的NLN-16培养基直接处理48h效果最好,其产胚率和加倍效率均显著高于未加秋水仙碱的对照。
短句来源
     The result showed that chromosomes of most pollen mother cells behaved normaly during the meiotic divisions. There are 11 bivalents formed at diakinesis which is the optimal time for chromosome count.
     结果表明:茴香的绝大多数花粉母细胞减数分裂过程中染色体的行为正常,终变期形成11个二价体,为染色体计数的最佳时期;
短句来源
     So the optimal time of collecting explant was the middle of Mayto the middle of June for young trees, contamination rate was 3.2%.
     幼年树初代培养取材的最佳时期为5月中旬到6月中旬,在此期间取材污染率可控制到3.2%。
短句来源
     Highest survival rate(98.3%) and best growth indicators were achieved in the treatment of 16~(th) to 28~(th),February,which date was recommended as the optimal time for grafting of mulberry in Huidong county.
     试验结果是:2月16~28日嫁接的桑树不仅成活率可以高达98.3%,且嫁接成活后良桑的生长势也为最优。 这一时期可以作为会东县桑树嫁接的最佳时期
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  “the optimal time”译为未确定词的双语例句
     6. the optimal time for wort boiling is 60~70 min;
     (6)麦汁煮沸时间以60~70min为宜;
短句来源
     The optimal time for appling fertilizer is half in spring and the other half applied in the last autumn; Apply N 90 kg/hm~2 for the two species,apply P_2O_5 120 kg/hm~2 for "Baronie" and 90 kg/hm~2 for "Park",respectively.
     两品种施肥管理是施肥时期均为春季施1/2+上年秋季施1/2,施氮量均为90 kg/hm2,品种Baronie施P2O5量为120 kg/hm2,Park施P2O5量为90 kg/hm2。
短句来源
     Conclusion NIPPV should be used earlier in the patients with Ⅱ respiratory failure and COPD. The optimal time was 50 mmHg
     结论COPD伴Ⅱ型呼吸衰竭患者应尽早使用NIPPV,应用NIPPV的最佳时机为50 mmHg
短句来源
     48h and 4.4mmol/L was the optimal time and H2O2 concentration, respectively.
     根据添加H2O2实验得出,H2O2添加量为1ml即在发酵液中浓度为4.4mmol/L左右为最适的添加量,最佳添加时刻为48h左右。
短句来源
     (2)At the temperature of 37 ℃ and using the combination digestive juice of 0.25%trypsin-0.02%EDTA,The optimal time for isolation of MEF was 3~5 min.
     (2)在37℃,0.25%胰酶-0.02%EDTA的混合消化液消化时间最好为3~5 min,此时消化下的细胞最多,活力最好;
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  the optimal time
Another example, applicable in a parallel manner by customer and product type, shows how accumulated information can be used to determine the optimal time allocation for individual sales visits, based on curvilinear statistical relationships.
      
Very early arrival of the patient at the emergency room provides the doctor with the optimal time in which to initiate IV treatment with anticoagulants or thrombolytics, potentially resulting in reperfusion.
      
The main results are: (1) When products are highly differentiated, the optimal time-consistent (no commitment) tax is always lower than the optimal pre-commitment tax.
      
The optimal time to assess brain indices of oxidative stress in this model is 48-h post-injection.
      
The integrity of the blood-brain barrier (BBB) was measured in male Sprague Dawley rats subjected to 16 weeks of portacaval shunting (PCS), the optimal time required for the cerebral changes to develop, by using anin situ brain perfusion technique.
      
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Observations on the flight duration and wingbeat frequency were made in thelaboratory at various constant temperatures and 65--75% relative humidity. The mothsused consisted of individuals emerged from pupae collected from the field and rearedin insectary. The results obtained indicated that some individuals of the moths can fly continouslyat 17℃ for 36 hours. Fig. 4 But the duration of flight varied with the insect age. In themoths one day after emergence it was shorter as campared with those of older ones.The...

Observations on the flight duration and wingbeat frequency were made in thelaboratory at various constant temperatures and 65--75% relative humidity. The mothsused consisted of individuals emerged from pupae collected from the field and rearedin insectary. The results obtained indicated that some individuals of the moths can fly continouslyat 17℃ for 36 hours. Fig. 4 But the duration of flight varied with the insect age. In themoths one day after emergence it was shorter as campared with those of older ones.The longest duration has been shown by those moths aged 3--4 days. Most of thefemale moths 5 days after emergence had fully developed ovaries, and their flight dura-tion dropped down rapidly. This fact suggests that the period before sexual maturationwould be the optimal time for the insects to carry out long distance migration. Nutrition and environmental temperature would influence the flight ability of themoths; the flight duration of the moths under starvation condition decreased apparently;and at lower temperatures it will be prolonged (table 2, 3). The wingbeat frequency varies with the age of moths, as shown in Figure 1. It isworth while to note that the difference in frequency of the two sexes increases with age,and fluctuates slightly with temperature within the range of 25--30℃, beyond which theinfluence of temperature on wingbeat frequency becomes apparent. Light or sound stimulation may affect the flying behaviour of the armyworm moths.Flash light or sound may initiate the flight of the resting moths (Fig. 5A, 6A) or causethe wingbeat frequency of flying moths to increase temporarily (Fig. 5B, 6B), with afactor of 6% for light stimulus and 8% for sound stimulus. They also cause the ampli-tude of wingbeat to increase temperarily (Fig. 7). The latent period of these responsesdre 0.08 and 0.09 second for light and sound stimulation respectively.

本文报导用记纹方法测定粘虫蛾飞翔持续时间和振翅频率所获得的结果。 粘虫蛾在羽化展翅后就能飞翔,随后,飞翔能力依蛾龄增长逐渐增加,至羽化后第3、4天达最强,此时室内饲养的成虫,在24小时内平均累积的飞翔时间达10.8小时,野外挖回的蛹羽化的成虫达20.6小时。羽化后5天,由于体内卵发育成熟,飞翔能力又逐渐降低。相同蛾龄的粘虫,飞翔持续时间可能受环境温度和营养条件的影响,环境温度较低时飞翔持续时间较长,饥饿显著地降低飞翔时间。长时间的记录表明,有些粘虫蛾在48小时内能累积飞翔30-40小时,若干个体能连续地飞翔36小时,这是迄今在实验条件下昆虫所能达到的最长飞翔时间。 粘虫蛾的振翅频率,雄虫较雌虫高。两性振翅频率都依蛾龄而变化,从羽化开始至第3天,随蛾龄而增加,3-12天中,雄蛾变化较小,雌蛾在第7天后则显著地降低。振翅频率依温度升降而变化,其关系曲线呈抛物线型。 突然的闪光刺激或声音刺激,可临时增加振翅频率和振幅,亦可使未飞翔的粘虫蛾开始飞翔。

In the present paper some factors affecting the superinduction of interferon in diploid cells were studied. The results showed that the titer of interferon superinduced in fetal skin muscle cell cultures was significantly higher than those in fetal human lung cell cultures. Cells treated with Astragalus membranaceus produced more interferon. Poly I:C and cycloheximide could be present simulstaneouly in the cell cultures during the whole course of superinduction. However, the duration of treatment with inhibitors...

In the present paper some factors affecting the superinduction of interferon in diploid cells were studied. The results showed that the titer of interferon superinduced in fetal skin muscle cell cultures was significantly higher than those in fetal human lung cell cultures. Cells treated with Astragalus membranaceus produced more interferon. Poly I:C and cycloheximide could be present simulstaneouly in the cell cultures during the whole course of superinduction. However, the duration of treatment with inhibitors of nucleic acid synthesis ( mithramycin and actinomy-cin D ) should not exceed one hour before the termination of superinduction. The. behaviour of superinduction by mithramycin was similar to that by actinomycin D The optimal time for combined poly I : C and cycloheximide treatment was about 9 hours. Under our experimental conditions, the interferon yield in the superinduction system was increased by 170-248 fold as compared with similar system without superinduction. The present paper describes a procedure for the large scale production of fibroblast interferon.

本文在人二倍体细胞培养上就影响干扰素超诱导的某些因素进行了研究。结果表明:人肌皮二倍体细胞株的干扰素超诱导能力高于人肺二倍体细胞株。黄芪处理细胞在超诱导系统中可以生产较高量的干扰素。聚I:C和环已亚胺能在超诱导的整个过程持续存在,但放线菌素D和光辉霉素则在超诱导终止前作用1小时最适宜。光辉霉素与放线菌素D有相似的干扰素超诱导作用。聚I:C与环已亚胺的适宜作用时间为7~9小时。在适宜条件下,干扰素的产量在超诱导系统中比单诱导增加170~248倍。本研究可为大量生产纤维细胞干扰素及提取干扰素mRNA提供依据,并为阐明干扰素超诱导机理提供基础。

In order to probe into the patho-genic factors of the esophageal cancerin Sichuan, the mouse bone marrowmicronucleus test of the metabolicextracts of predominant fungi-A. ver-sicolor and P. cyclopium in pickledvegetables was used for the detectionof mutation. 196 mice of three strains were used:C_(57) (174 animals), ICR (12 animals)and Kunming (10 animals). The me-tabolic extracts were injected hypo-dermically once a day for 2, 3 or up to5 days. Six or thirty even fifty fourhours after the last injection, all...

In order to probe into the patho-genic factors of the esophageal cancerin Sichuan, the mouse bone marrowmicronucleus test of the metabolicextracts of predominant fungi-A. ver-sicolor and P. cyclopium in pickledvegetables was used for the detectionof mutation. 196 mice of three strains were used:C_(57) (174 animals), ICR (12 animals)and Kunming (10 animals). The me-tabolic extracts were injected hypo-dermically once a day for 2, 3 or up to5 days. Six or thirty even fifty fourhours after the last injection, all micewere killed and smears of bone marrowof the sternum were obtained bysqueezing it with a hemostat. Afterdrying, the smears were stained withGiemsa's dye and studied under micro-scope in oil immersion. Only the micro-nuclei of polychromatophilic red bloodcells were scored. In each mouse, 1000such cells were examined and thenumber of those bearing micronucleusrecorded. The micronucleus rates of metabolicextracts in ten strains of A. versicolorand that in eight strains of P. cyclopiumwere calculated. Positive results werefound in eight and five strains withsignificant and highly significant dif-ferences respectively. However, thecorrelation between the results of mi-cronucleus test and distribution of theesophageal cancer in the high incidencearea could not be proved. There wasa positive correlation between themicronucleus rates and dosage of me-tabolic extracts of A. versicolor. Inthis test,C_(57) and Kunming mice weremore sensitive to the metabolic extractsof A. versicolor than ICR mice. The optimal time to take the bonemarrow was six or thirty hours after thelast injection, because the micronu-cleus rate was high at that time andwas lower after fifty four hours. This method was successful for thedetection of mutagenicity of the meta-bolic extracts of A. versicolor andP. cyclopium in pickled vegetablescollected from a high incidence area ofesophageal cancer in Sichuan province.The metabolic extracts of A. versicolorin eight of ten strains and that of P.cyclopium in five of eight strains werefound to be mutagenitic. The authorsbelieve that the application of mousebone marrow micronucleus test of fungimetabolic extracts in the examinationof mutation was completely feasible.

本文报告用我省食管癌高发地区,居民食用的酸菜样品中,分离所得优势真菌杂色曲霉及圆弧青霉的代谢提取物,作小鼠骨髓微核试验,进行致突变检测。结果发现大多数菌株具有阳性反应。对杂色曲霉代谢提取物的敏感动物、剂量效应关系以及在体内致突变作用的时间关系,分别进行了检测。

 
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