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响应阈值
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  response threshold
     The shape and size of the nanoparticles of the rare earth affect the photoemission photospectral response threshold of the thin films. The threshold wavelength of the photospectral response of the thin film,in which the rare earth (Sm) nanoparticle shape was sphere,was 720 nm. The threshold wavelengths of the photospectral response of the thin films,in which the rare earth (La and Nd) nanoparticles shape was long,were 650 nm and 660 nm,respectively.
     研究表明薄膜的光电发射光谱响应阈值受纳米稀土粒子形状和大小的影响,球形纳米稀土(Sm)粒子-BaO介质薄膜的光谱响应阈值波长为720nm,条状纳米稀土(La和Nd)粒子-BaO介质薄膜阈值波长分别为650nm和660nm.
短句来源
     The paper compares the test methods and requirements of sensitivity and response threshold of the point photo electric smoke detector regulated in the related standards in the USA,Europe and Japanese. It then puts forward the method to improve the sensitivity of the photo electric smoke detector.
     对美国、欧洲、日本点型光电感烟火灾探测器 (以下简称光电感烟探测器 )标准所规定的火灾灵敏度试验和响应阈值试验的试验方法及要求进行比较 ,提出了改进光电感烟探测器灵敏度的方法
短句来源
     CONCLUSION Indicated by the increasing gap response threshold, PB decreases the temporal resolution of IC and AC in guinea pigs.
     结论PB可降低豚鼠以间隔响应阈值为代表的时间分辨率。
短句来源
  “响应阈值”译为未确定词的双语例句
     OBJECTIVE To explore the effect of pentobarbital (PB) on gap responses recorded from inferior colliculus (IC) and auditory cortex (AC) of guinea pigs. METHODS Chronic electrodes were implanted in IC and AC of guinea pigs.
     目的探讨苯巴比妥(pentobarbital,PB)对豚鼠下丘(inferior colliculus,IC)和听皮层(auditory cortex,AC)间隔响应阈值、幅值及潜伏期的影响。
短句来源
     RESULTS PB increased the threshold of gap responses in both IC and AC, with larger impact on AC.
     结果PB使间隔响应阈值升高,其中对AC的影响大于IC。
短句来源
     The response to gaps embedded in noise was recorded in awake, and when animals were anesthetized with PB at two doses: 20mg/kg and 40mg/kg. The threshold, amplitude and latency of the gap responses form IC and AC were compared across the three conditions.
     方法在豚鼠IC和AC分别埋植慢性电极,比较清醒和两种剂量(20mg/kg和40mg/kg)PB麻醉状态下的间隔响应阈值、幅值和潜伏期。
短句来源
     The PL spectra with the peak position of 380 nm could be observed using the excited wavelength of 260 nm during the process of testing the PL spectra of nanoparticleTiO2/Ti film, possibly resulting from the electron transition from the bottom of conduction band to the top of valence band.
     在纳米粒子TiO2/Ti膜的PL光谱测试中,以260nm为激发波长,观察到了峰位在380nm处的PL光谱,该值与SPS信号的响应阈值是一致的,此PL光谱峰可能与导带低的电子向价带顶的能级跃迁有关,同时说明了TiO2纳米粒子的量子尺寸效应的影响要大于库仑作用能和表面极化能的影响.
短句来源
     All the above might result in the improvement of the photocatalytic activity over TiO2 through La3+, Y3+, Gd3+, Er3+, Nd3+ doping, while the decrease of the photocatalytic activity over Pr/TiO2 catalyst might be due to its changeable electrovalence which made Pr3+ easily act as irreversible trap of hole.
     虽然Pr/TiO2催化剂的锐钛矿相含量增加、比表面积增大、粒径变小、吸收边发生蓝移、SPS的响应阈值增大,但是由于具有可变价态的Pr3+离子容易成为空穴捕获的不可逆陷阱,使得Pr/TiO2的表面光电压信号减弱,光生电子-空穴对没有得到有效分离,故显示出较差的光催化活性。
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短句来源
     Frequency Response
     频率响应
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  response threshold
According to the hypercapnic test, the ventilatory response threshold decreased, whereas ventilatory sensitivity increased; these effects were most pronounced during the first ten days of INH training and still detectable in recovery.
      
The second way, defined as the repeatition mechanism, implies the appearance of repeated responses in fibers that already responded to the first pulse but suffered a decrease in their response threshold after the first spike generation.
      
In laboratory experiments, we conducted trials to test for the effect of donor body condition on the minimum behavioural response threshold and/or intensity of antipredator response to conspecific chemical alarm cues.
      
We found that cichlids exhibited overt antipredator behaviour beginning at a concentration of 25% for the high condition cue, while a minimum response threshold concentration of 50% was seen for low condition cue.
      
RC3/neurogranin, a postsynaptic calpacitin for setting the response threshold to calcium influxes
      
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  response threshold value
It is disconnected initially until a response threshold value--termed the open distance, is reached.
      


The relation between the catalytic activities and the photovoltaic response of transition metal complex oxides for the hydroxylation of phenol was studied by means of surface photovoltage spectroscopy (SPS) and field induced SPS technique. The results showed that the photovoltaic threshold and the response to external field were distinctly varied with different metal ions of metal complex oxides. Moreover, the catalytic activity was relative to photovoltaic threshold, i. e., the smaller the threshold, the higher...

The relation between the catalytic activities and the photovoltaic response of transition metal complex oxides for the hydroxylation of phenol was studied by means of surface photovoltage spectroscopy (SPS) and field induced SPS technique. The results showed that the photovoltaic threshold and the response to external field were distinctly varied with different metal ions of metal complex oxides. Moreover, the catalytic activity was relative to photovoltaic threshold, i. e., the smaller the threshold, the higher the catalytic activity. The regularity summarized from above results has been explained reasonably.

利用表面光电压谱和场诱导表面光电压谱研究过渡金属复合氧化物(铁酸盐)的光伏响应特性和它们苯酚羟基氧化催化活性.结果表明,随着掺入的金属离子不同,光伏响应阈值和对外电场响应特性有明显差异,并且,光伏响应阈值和外电场光电响应特性与催化活性之间有很好的对应关系.阈值越小,活性越高.在负电场下,光伏响应增强的催化剂的催化活性也增加.

The nanoparticle TiO2/Ti films were prepared by a sol\|gel process calcined at 600 ℃using \{Ti\|\}(OC\-4H\-9)\-4 as raw material, the as\|prepared film samples were also characterized by TG\|DTA, XRD, SEM, XPS, PL, SPS and EFISPS testing techniques. The results indicated that the nanoparticles TiO2/Ti films had highly cracked structures uniformly, and TiO2 nanoparticles had similar composition, structure and crystallite size with the internationally commercial P\|25 TiO2; The Ti element mainly existed on...

The nanoparticle TiO2/Ti films were prepared by a sol\|gel process calcined at 600 ℃using \{Ti\|\}(OC\-4H\-9)\-4 as raw material, the as\|prepared film samples were also characterized by TG\|DTA, XRD, SEM, XPS, PL, SPS and EFISPS testing techniques. The results indicated that the nanoparticles TiO2/Ti films had highly cracked structures uniformly, and TiO2 nanoparticles had similar composition, structure and crystallite size with the internationally commercial P\|25 TiO2; The Ti element mainly existed on the nanoparticle TiO2/Ti film as the chemical state of Ti\+\{+4\}, which corresponded to the results of EFISPS. The O element existed as three kinds of chemical states involving the crystal lattice oxygen, hydroxyl oxygen and adsorbed oxygen with the increasing band energy, which was in agreement with the results of TG\|DTA and PL; The PL spectra with the peak position of 380 nm could be observed using the excited wavelength of 260 nm during the process of testing the PL spectra of nanoparticleTiO2/Ti film, possibly resulting from the electron transition from the bottom of conduction band to the top of valence band. The PL peak position was the same as the onset of its SPS, which showed that the effects of the quantum size on optical property were greater than that of the Coulomb and surface polarization The PL spectra could be found, with two peak related to the anatase and rutile respectively, using the excited wavelength of 310 nm. The weak PL spectra could be found using the excited wavelength of 450 nm, resulting from the surface states. In addition, during the experimental process of the photocatalytic degradation phenol, the nanoparticle TiO2/Ti film obtained the highest photocatalytic activity with coating 3 times.

以钛酸四丁酯为原料,采用溶胶-凝胶法,在600℃焙烧制备了纳米粒子TiO2/Ti膜,并利用TG-DTA、XRD、SEM、XPS、PL、SPS和EFISPS测试技术,对膜样品进行了表征.结果表明,纳米粒子TiO2/Ti膜表面为高密度的均匀碎片结构,TiO2纳米粒子具有与国际商品P-25型TiO2粒子相类似的组成、结构以及微晶尺寸;在纳米粒子TiO2/Ti膜的表面,Ti主要以+4价化学态存在.而O主要以晶格氧、羟基氧和吸附氧3种化学态存在.在纳米粒子TiO2/Ti膜的PL光谱测试中,以260nm为激发波长,观察到了峰位在380nm处的PL光谱,该值与SPS信号的响应阈值是一致的,此PL光谱峰可能与导带低的电子向价带顶的能级跃迁有关,同时说明了TiO2纳米粒子的量子尺寸效应的影响要大于库仑作用能和表面极化能的影响.以310nm为激发波长,分别观察到了与锐钛矿和金红石相关的发光信号;以450nm为激发波长,观察到了与表面态相关的弱的发光信号.此外,在光催化降解苯酚实验中,当涂膜3次时,TiO2粒子膜达到最高的光催化活性.

The nanoparticle rare earth (La、Nd、Sm) BaO composite thin films were deposited through vacuum evaporation.The shape and size of the nanoparticles of the rare earth affect the photoemission photospectral response threshold of the thin films.The threshold wavelength of the photospectral response of the thin film,in which the rare earth (Sm) nanoparticle shape was sphere,was 720 nm.The threshold wavelengths of the photospectral response of the thin films,in which the rare earth (La and Nd) nanoparticles shape...

The nanoparticle rare earth (La、Nd、Sm) BaO composite thin films were deposited through vacuum evaporation.The shape and size of the nanoparticles of the rare earth affect the photoemission photospectral response threshold of the thin films.The threshold wavelength of the photospectral response of the thin film,in which the rare earth (Sm) nanoparticle shape was sphere,was 720 nm.The threshold wavelengths of the photospectral response of the thin films,in which the rare earth (La and Nd) nanoparticles shape was long,were 650 nm and 660 nm,respectively.We obtained that the equivalent barrier around rare earth nanoparticle was 1.7~2.0 eV.Because the work functions of rare earth nanoparticles and BaO composite are different,the spatial electron distribution around the rare earth nanoparticles is changed in the composite thin films.Then the energy bands around the rare earth nanoparticles become curved.

用真空蒸发沉积的方法制备了纳米稀土(La、Nd、Sm)粒子-BaO介质薄膜.研究表明薄膜的光电发射光谱响应阈值受纳米稀土粒子形状和大小的影响,球形纳米稀土(Sm)粒子-BaO介质薄膜的光谱响应阈值波长为720nm,条状纳米稀土(La和Nd)粒子-BaO介质薄膜阈值波长分别为650nm和660nm.研究得到纳米稀土粒子-介质薄膜等效界面位垒高度在1.7~2.0eV之间.由于纳米稀土粒子与BaO介质各自逸出功不同,当构成薄膜后使得纳米粒子周围的空间电荷分布发生变化,纳米粒子周围的能带发生弯曲.

 
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