查询词典 attenuation

The reconstruction algorithm is similar to one for phase scatterers, but the computation of the direct scattering is different, because the attenuation must be calculated.

这种散射体的重建与纯位相型散射体的重建一样，不同的只是在计算正散射时考虑了吸收的影响。

He could hear the hum of half-a-dozen voices in a room near him, and the jingling harmonies of a set of variations to Deh Conte, upon a piano, whose every wire was evidently in the last stage of attenuation.

他听得见隔壁一个房间里有五六个人在嘈杂地说话，有钢琴上弹奏的德·孔特的变奏曲的简单和声，而每一根琴弦显然已经到了声嘶力竭的最后阶段。

To elucidate the molecular basis of the attenuation ofDLA-EIAV in virulence thus provide theory foundation for designing HIV vaccine, thewhole genomes of DLA-EIAV and EJAV L provirus were cloned and sequenced. Aninfectious molecular clone derived from DLA-ELAV was constructed and characterized.Three DLA-EIAV/ L chimeric viruses were constructed. Promoting efficacy of the longterminal repeat of the DLA-EIAV was charactenzed.

为了揭示我国马传贫弱毒疫苗毒力致弱及免疫保护的分子机制，为人免疫缺陷病毒及其它慢病毒的免疫预防提供借鉴，我们对马传贫驴白细胞弱毒及其亲本马强毒EIAV L株前病毒进行了全基因克隆和序列测定，比较分析了二者的前病毒基因组核苷酸序列，在此基础上构建了EIAV驴白细胞弱毒株的感染性分子克隆和三株含有EIAV强/弱毒嵌合病毒基因组的重组质粒，并对EIAV弱毒株长末端重复序列的启动子活性进行了初步研究。

To elucidate the molecular basis of the attenuation ofDLA-EIAV in virulence thus provide theory foundation for designing HIV vaccine,thewhole genomes of DLA-EIAV and EIAV L provirus were cloned and sequenced.Aninfectious molecular clone derived from DLA-EIAV was constructed and characterized.Three DLA-EIAV/L chimeric viruses were constructed.Promoting efficacy of the longterminal repeatof the DLA-EIAV was characterized.

为了揭示我国马传贫弱毒疫苗毒力致弱及免疫保护的分子机制，为人免疫缺陷病毒及其它慢病毒的免疫预防提供借鉴，我们对马传贫驴白细胞弱毒及其亲本马强毒EIAV L株前病毒进行了全基因克隆和序列测定，比较分析了二者的前病毒基因组核苷酸序列，在此基础上构建了EIAV驴白细胞弱毒株的感染性分子克隆和三株含有EIAV强/弱毒嵌合病毒基因组的重组质粒，并对EIAV弱毒株长末端重复序列的启动子活性进行了初步研究。

Compared with the prior art, the invention has the advantages that:(1) the active neural microelectrode integrates signal collection/processing and stimulation function in the same preposed signal processing chip, which can reduce the disturbance of environmental noise, inhibit the attenuation caused by parasitic capacitance, filter polarized voltage and greatly improve the speech-noise ratio and stability of the whole microelectrode; and (2) the active neural microelectrode integrates digital logic control and stimulation circuit in the chip, so as to reduce the amount of output leads and simplify the complexity of subsequent circuits.

本发明相对于现有技术具有如下突出特点：(1)将信号的采集，处理以及刺激功能集成在一个前置信号处理芯片上，不仅减少了因为环境噪声的干扰，而且很好的抑制了寄生电容引起的衰减，滤除了极化电压，大大增强了整个微电极的信噪比和稳定性；(2)同时，将数字逻辑控制和刺激电路也集成在此芯片上，减少了输出引线的数目，简化了后续电路的复杂性。

Attenuation A mechanism in the trp operon to ensure that genes are not transcribed in the presence of tryptophan.

衰减作用 trp 操纵子中用于确保当色氨酸存在时基因不被转录的一种机理。

Transcribed sequence just downstream of the trp operon promoter that is central to the attenuation mechanism.

紧接在trp操纵子的启动子之后转录出来的序列，对衰减作用机理很重要。

Attenuator Transcribed sequence just downstream of the trp operon promoter that is central to the attenuation mechanism.

衰减子 紧接在 trp 操纵子的启动子之后转录出来的序列，对衰减作用机理很重要。

By adopting the smooth pseudo Wigner-Ville distribution and Gabor expansion, the paper expands the attenuation curves of induced electromotive force of the typical two-layer (D-and G-type) geo-electricity models and three-layer (H-, A-, K-and Q-type) geo-electricity models to the two-dimensional time-frequency plane.

虽然观测数据如感应电动势有较大的数值，但实际上探测深度却大大减小了。当有上覆低阻层存在时，要探测同样的深度，需要较长的观测时间。

The spectrum of vertical rectangular-cylinder put up periodic zero counters which mark off quadrate areas,the values of counter in each areas alternately change between the plus and the minus,and with the increasing of wave number,the values of counter present attenuation character alike e exponent.

直立矩形柱体谱出现了周期性变化的零等值线，该等值线将非零等值线划分为a× b 个矩形区域，而且等值线值在各矩形型区域中正负交替变化，随着波数的增大，不同的矩型域中等值线值呈e指数衰减特征。

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

14：33 盐本是好的，盐若失了味，可用什么叫它再咸呢？

He reiterated that the PLA is an army of the people under the leadership of the Communist Party of China.

他重申，人民解放军是在中国共产党领导下的人民军队。