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频率降低     
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  frequency reduction
     ④ U73122 (40 μmol/L) elicited the small mIPSC frequency reduction to (74.7±29.6)% of control.
     ④U73122 (40μmol/L)可使小mIPSCs的平均频率降低至对照组的(74. 7±29. 6)%。
短句来源
     The space charge wave equation of electron ham in drifting tube filled with plasma and without external magnetic field is given in this paper. The wave properties are studied in detail under this condition and the plasma frequency reduction factor is also analyzed ,The study shows that the space charge wave properties are strongly related with plasma filling situation so the apace charge wave can be controlled to some extent by choosing plasma filling factor
     本文导出了无外磁场电子注在等离子体约束下其上传播的空间电荷波波动方程,详细讨论了该条件下的波特性,并对等离子体频率降低因子进行了分析.研究表明,等离子体填充状况对空间电荷波性质影响甚大,选择等离子体填充因子可对空间电荷波性质进行适当的控制.
短句来源
     In this paper,the influence of thrust and air drag on rocket lateral vibration is studied,and the frequency reduction under the thrust and drag is analyzed. The formulas for evaluation of the changes of frequencies and vibration modes are obtained.
     文章重点讨论了推力和空气阻力对火箭横向振动频率和振型的影响 ,分析了在推力和阻力作用下频率降低的原因 ,给出了推力对振型频率影响的估计式。
短句来源
     But because of influences from large group interval(10-20m),multi-resultant,high frequency(60 Hz,100 Hz),geophone amplitude-frequency response,long and narrow fascicular recording geometry,shot to geophone azimuth variation give rise to frequency reduction,swinging constrain further improving of resolution.
     受大道距(10~20m)、多组合、高频(60Hz、100Hz)检波器的幅频响应、狭长的束状观测系统、炮检方位角变化引起频率降低等因素的影响,极大地约束了分辨率的进一步提高。
短句来源
     But because of imfluences fromlarge group interval(10-20m),multi-resultant,high frequency(60Hz,100Hz),geophone amplitude-frequency response,longand narrow fascicular recording geometry,shot to geophone azimuth variation give rise to frequency reduction,swinging con-strain further improving of resolution.
     受大道距(10~20m)、多组合、高频(60Hz、100Hz)检波器的幅频响应、狭长的束状观测系统、炮检方位角变化引起频率降低等因素的影响,极大地约束了分辨率的进一步提高。
  frequency decrease
     Maintaining the output character of the system, the voltage space vector control was improved which made the switching frequency decrease 50%.
     对空间电压矢量方法进行了改进,在不改变系统输出特性的前提下,使开关频率降低了 50%。
短句来源
  decrease of frequency
     The block of big conductance calcium activated potassium channel(Bkca) by Iberiotoxin resulted in decrease of frequency but increase of amplitude in the control, but only increase of frequency in DI. The opener, NS1619, resulted in decreases of frequency and amplitude in the control, but only decreases of frequency in DI.
     大电导钙激活钾通道 (Bigcon ductancecalciumactivatedpotassiumchannel,BKca)阻断后 ,对照组频率降低而张力增加 ,DI组仅频率明显提高 ,开放后对照组频率与张力均降低 ,DI组仅频率明显下降。
短句来源
     Examples of numerical simulation show that low velocity layer leads to narrowing of seismic wave frequency band,as well as decrease of frequency and resolution of deep formations. This result is helpful for the study of high resolution seismic data processing methods.
     通过模拟实例发现,地表低降速带使地震波频带变窄,频率降低,影响了深部地层的地震勘探分辨率,模拟结果可以用来进行提高分辨率的地震处理方法研究。
短句来源
  “频率降低”译为未确定词的双语例句
     Results: The alleles frequencies of HLA-DRB1*0701/02 and DRB1*1201/02 were significantly increased (Pc<0.0001), while the alleles frequencies of HLA-DRB1*0901/02 and DRB1*11 were decreased (adjusted Pc>0.05) in generalized vitiligo compared with normal controls.
     结果:与262例正常对照组相比较,泛发型白癜风患者HLA-DRB1*0701/02、DRB1*1201/02基因频率显著增高(Pc<0.0001),HLA-DRB1*0901、DRB1*11基因频率降低(但经校正后Pc>0.05);
短句来源
     ①Frequency of Apo ε4 in patients with VD increased (P < 0.01) and that of Apo ε3 decreased (P < 0.05), while there were no signigicant differences among each allele frequencies (P < 0.05).
     ①血管性痴呆组患者载脂蛋白ε4频率升高(P<0.01),ε3频率降低(P<0.05),而各等位基因频率差异无显著性(P>0.05);
短句来源
     Results 1. Compared with the controls, the frequency of ApoEε4 allele and ApoEε4 genotypes in the BPSD group was increased(P<0.001), but the frequency of ApoEε3 allele in that was reduced(P<0.001), and the frequency of the ApoC-ⅠH2 allele was increased(P<0.05);
     结果①与对照组比较,BPSD组ApoEε4等位基因及ε4基因型出现的频率增高(P<0·001),而ApoEε3等位基因出现频率降低(P<0·001),ApoC-ⅠH2等位基因出现的频率增高(P<0·05);
短句来源
     After perfusing the brain slices with AG Ⅱ (10~(-7) mol/L,3 min), spontaneous discharge rate of 40/55 (72.73%) neurons was significantly increased, while that of 3/55 (5.45%) was decreased and 12/55 (21.82%) neuronswere non--responsive.
     脑片灌流AGⅡ(10~(-7)mol/L,3min)后,40/55个单应(72.73%)放电频率明显增加,3/55个单位(5.45%)放电频率降低,12/55个单位(21.82%)无明显反应。
短句来源
     The results showed that the average daily gain of group Ⅱ and Ⅲ increased by 13.4% and 10.6%,the feed conversion rate decreased by 13.3% and 11.3%, and the diarrhen frequencies decreased by 73.0% and 72.2% comparing with the control group. Also the benefits of each piglet in the treatment groups increased by 47.7% and 39.4%respectively comparing with the control group.
     试验结果表明 :Ⅰ、Ⅱ组分别比对照组平均日增重提高 13.4% ,10 .6 % ,料肉比降低 13.3% ,11.3% ,腹泻频率降低 73 .0 % ,72 .2 % ,以对照组为 10 0 %作效益比较 ,Ⅰ、Ⅱ组中平均每头仔猪分别提高 47.7% ,39.4%。
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  frequency reduction
Additionally, frequency reduction and boundary smoothing of linked profiles are discussed.
      
The magnitude of burst frequency reduction is correlated with the degree to which the salinity is reduced.
      
The resected region showed focal cortical dysplasia and the patient had greater than 95% seizure frequency reduction at 3-year follow-up.
      
Although the use of diminished sound amplitude for PTX diagnosis assumes availability of baseline measurements, this appears unnecessary for high-frequency reduction or sound amplitude changes over the respiratory cycle.
      
Two groups demonstrated statistical significance in both mean quality of life improvement and incontinence frequency reduction at 6 months.
      
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  frequency decrease
Together with the frequency decrease (spreading of the pulse), this phenomenon can serve as a short-term earthquake precursor.
      
The adsorption density can be monitored by the frequency decrease.
      
On the basis of the analysis of the multidimensional information provided by the PQCI technique the observed frequency decrease was mainly ascribed to the increase in the mass of the sensor surface resulting from the binding.
      
This is clearly demonstrated by an observed maximum frequency decrease of 99 Hz for the adsorption of the C-fragment of tetanus toxin to GD1b.
      
In contrast to this large frequency decrease, which was unexpectedly high with respect to Sauerbrey's equation, implying pure mass loading, a maximum shift of only 28 Hz was detected after adsorption of the C-fragment of tetanus toxin to GD1a.
      
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  decrease of frequency
Nevertheless, the maximum increase and decrease of frequency obtained by angular acceleration in opposite positions show a satisfactory agreement in neurons giving signals with high frequency.
      
With stepwise reduction of temperature from 35°C to about 20°C, the spike frequency decreases continuously (Q10=3.39); below 20°C there is often an additional discontinuous decrease of frequency through multiplication of spike intervals.
      
More acid perfusates cause a decrease of frequency, which is probably due to their effect on calcium ionization.3.During perfusion, ventilation does not reach the maximal values observed under control conditions.
      
Open cholecystectomy caused an evident decrease of frequency and amplitude of colonic slow waves in comparison to laparoscopic cholecystectomy.
      
However, with respect to the carbon source of the media, the most remarkable decrease of frequency of constitutive cells was observed on maltose and not on glucose as could be expected.
      
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The present study was undertaken with one dog, on whose cortex, at the region of the sigmoid gyrus, were imbedded two permanent electrodes known respectively as electrode A and electrode B. Under stimulation, electrode A gives movement of the left hind leg, and electrode B elicits movement of the toes of the left front leg.The main aim of the experiment is to determine the minimal strength in voltage for eliciting the first appreciable motor response, when the frequency of the stimulating current is under control....

The present study was undertaken with one dog, on whose cortex, at the region of the sigmoid gyrus, were imbedded two permanent electrodes known respectively as electrode A and electrode B. Under stimulation, electrode A gives movement of the left hind leg, and electrode B elicits movement of the toes of the left front leg.The main aim of the experiment is to determine the minimal strength in voltage for eliciting the first appreciable motor response, when the frequency of the stimulating current is under control. With an ordinary audio-oscillator to administer the stimulus frequencies, the range of frequencies utilized is 20—20,000 cycles.For the same frequencies, the minimal voltage for eliciting the motor response varies considerably from one sitting to another (see Table 1), but within the same sitting the same frequencies, even when repeated with many other frequencie intervening, require closely similar minimal voltages. Furthermore, a clear trend is always present in the relationship between the frequency of the stimulating. current and the minimal voltage necessary for eliciting the motor response, i. e., within the range of frequencies used (20—20,000), the middle frequencies need farsmaller stimulus strength in voltage than either the lower or the higher ones to elicit the same motor response.It was found that the minimal effective voltage is lowest for the 300—1,000. cycles region. Frequencies lower than 300 or higher than 1,000 need higher voltage. Furthermore, frequencies from 300 downwards and from 1,000 upwards are accompanied by progressively higher voltage. Electrodes A and B yield closely similar results (see Table 3 and Fig. 2). Thus, the frequencies from 300 to 1,000 cycles may be considered as possessing the most effective stimulus value.Besides the definite frequency-voltage relationship just mentioned, frequency affects the type of motor response as that frequencies of 100 and below 100 no longer elicit the regular response of the leg or the toes alone, but give rise to neck. movement in addition. Neck movement becomes eventually the only motor response to frequencies 50—20. With electrode A the above mentioned phenomenon. appeared with great regularity (see Table 4).When the experiment was over, the dog was killed and its brain examined histologically. It is seen that both electrodes are in the sigmoid gyrus of the right hemisphere, but they enter into different depths. Electrode A penetrates into between layer Ⅴ and layer Ⅵ, while electrode B penetrates only into layer (see Figs. 4 and 5).

在本实驗中在一只小狗的乙狀回皮質中埋了兩个固定的电極,分別地利用这兩个电極,在狗的正常狀态下,試驗了各种頻率的电流,發現中間頻率(300—1000周)的电流引起运动反应所必需的电压最低,自300周以下和1000周以上,引起运动反应的最 低伏特值逐步增加。 实驗还証明,直接作用于乙狀回皮質上一定点的电流当其頻率降低到某种程度时,可以使运动反应的性質改变。

The effects of morphine upon higher nervous activities of rats were studied on 5 types of operant conditionings: (1) fixed interval, (2) variable interval, (3) discriminative conditioning, (4) multiple schedule (alternate fixed interval and fixed ratio) and (5) avoidance conditioning. The main action of morphine observed was a lowering of the response rate. In the fixed interval schedule involving conditioning to time interval, there was also a shortening or elimination of the initial pause, indicating that...

The effects of morphine upon higher nervous activities of rats were studied on 5 types of operant conditionings: (1) fixed interval, (2) variable interval, (3) discriminative conditioning, (4) multiple schedule (alternate fixed interval and fixed ratio) and (5) avoidance conditioning. The main action of morphine observed was a lowering of the response rate. In the fixed interval schedule involving conditioning to time interval, there was also a shortening or elimination of the initial pause, indicating that this type of conditioning was very susceptible to morphine. In the multiple schedule, morphine did not show any selective action on the fixed interval component, i.e., it lowered the response rate in both components. The differentiation in discriminative conditioning was not affected. After the development of tolerance, morphine no longer induced a lowering, but often an increase in the response rate.

(一) 本文采用5种不同类型的操作式条件反射方法,研究了吗啡对大白鼠高极神经活动的影响。吗啡的主要作用是使动物反应频率降低。但形成耐受性后再给吗啡,则有增加反应频率的趋势。 (二) 吗啡对固定间隔強化实验的影响较为特殊,除使反应频率降低外,初休止期大大缩短,说明能减弱时间性分化。但吗啡并不能影响有鉴别信号的分化,如在操作式鉴别性条件反射及固定间隔固定比例強化的复合实验中,未会观察到吗啡对分化的影响。 (三) 吗啡对经典及操作式两种迴避性条件反射,都显示抑制作用,表现为反应频率的降低或潛伏期延长。在经典类型中,小剂量吗啡尚有缩短潛伏期的作用。

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本文研究了作用在透水护坦上的平均动水荷载及脉动荷载.研究指出,在护坦范围内设置排水孔(Π_д/Π_п=5~8%),不仅能消除压力差,而且会导致护坦上脉动荷载的降低.试验表明,透水护坦上脉动荷载的数值及其分布特性不妨碍将护坦进行分块.文中也研究了脉动压力向护坦底面传递的规律.研究表明,在考虑水的附加质量及压力差的影响后,护坦板自由振动的基本频率降低约50%.文中最后给出了设计透水护坦的一些建议.

 
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