登录

双语推荐：押施密特

进入期刊文章
施密特因子具有计算简单、表述方便的优点，在金属微观塑性变形机理分析中，能够定性判断微观变形模式滑移和孪晶的启动。首先介绍了施密特因子在密排六方晶体结构中的多种表述形式，然后分别列出了其在镁合金塑性变形微观机理分析中的应用。上述应用结果表明，施密特因子在镁合金变形机理研究中是不可缺少的工具。
Schmid factor has advantages of easy calculation and convenient description, which can quantitatively pre-dict activations of deformation micro-modes sliding and twinning. In this paper, some description ways of Schmid factor were first introduced, and application of Schmid factor in analyzing Mg alloy deformation micro-mechanism were also lis-ted, which shows that the Schmid factor was an indispensible tool in Mg alloy deformation mechanism investigation.

[ 可能符合您检索需要的词汇 ]

进入期刊文章
利用WDW3100电子万能试验机沿挤压态AZ31镁合金试样的挤压方向进行预压缩,研究了在不同施载模式下试样的屈服行为.结果表明:一方面,沿挤压方向的预压缩显著地降低了其拉伸屈服强度,使得其拉伸屈服强度与无预应变的压缩屈服强度几乎相等.造成这一现象的原因是经预压缩后的试样再拉伸时发生了退孪生.另一方面,沿挤压方向的预压缩显著地提高了垂直于挤压方向的压缩屈服强度.在不同施载模式下,分析{10-12}孪生施密特因子表明,孪生体系的最大施密特因子的大小对镁合金屈服强度有重要影响.对于{10-12}孪生主导的塑性变形,如果存在大量相同最大施密特因子的晶粒,则其具有相等的屈服强度,反之则不同.
In this study ,the prior compression along the extrusion direction in an extruded AZ 31 magnesi-um alloy has been carried out on the electronic universal testing machine CM T 5105 ,the yielding behavior of samples under different loading modes have been investigated .T he results show that ,on the one hand , the prior compression along extrusion direction markedly decreased their tensile yield stresses ,leading to that nearly equaled to their compression yield stresses without prior strain on the extruded magnesium al-loy AZ31 .The reason for this phenomenon is the occurrence of detwinning during tension after pre-com-pression in the sample .On the other hand ,the prior compression along extrusion direction could increase the compression yield stresses when compression perpendicular to extrusion direction .Schmid factors for the{10-12} twin variants under different loading modes have been analyzed .It shows that the values of the highest Schmid factor for{10-12}twinning had great effec

[ 可能符合您检索需要的词汇 ]

进入期刊文章
施密特在《马克思的自然概念》一书中首先继承了马克思关于自然界对人类具有先在性问题，来确立他唯物主义的立场。关于社会与自然的关系，施密特从非本体论的层面提出了自然与社会“互为中介”的一对逆命题。其实，马克思在理解自然概念时，既从物质层面注重自然的先在性和客观实在性，又从实践角度强调自然所具有的社会历史特征。社会无论作为自然界的一部分，还是作为自然界的对立物，都可以中介自然；但自然只有作为社会的外部环境和生产要素时才能中介社会，当把自然看作全部存在物的总和的自然时，它包含人类社会，总体中介部分显然在逻辑上行不通。所以，施密特的这个“双向中介”理论中的“自然”的内涵不同，把它作为一对逆命题来理解社会与自然的关系是不符合马克思的原意。
Schmidt first inherits Marx''s idea of nature first to human beings in Marx''s Concept of Nature so as to establish his materialistic stance. In the analysis of the relation between society and nature, Schmidt puts forward a pair of converse propositions of mutual intermediary relation between society and nature at the level of non-ontology. In fact, Marx''s concept of nature not only focuses on nature''s first position and objective reality at the material level, but also emphasizes the social and historical features of nature at the level of practice. Society, whether it is a part of nature or the anti-thing of nature, can mediate nature; but only when nature is the external environment and productive factor can it mediate society. When nature is regarded as the sum of all entities, it includes human society, it can not be a general mediator logically. Therefore, the connotation of nature in Schmidt "bidirectional intermediary theory" is different, it is a distorted underst

[ 可能符合您检索需要的词汇 ]

进入期刊文章
文章介绍了一种采用单片机来控制MOS开关管IRF3205的太阳能光伏充电电路,并根据蓄电池的电气特性提出了一种采用软件施密特触发器来实现过充保护的算法。
This paper presents a single-chip computer to control the MOS switch IRF3205 solar PV charging circuit, and electrical characteristics of the battery using the software presents a Schmitt trigger to achieve overcharge protection algorithms.

[ 可能符合您检索需要的词汇 ]

进入期刊文章
研究挤压态镁合金沿挤压方向预压缩对随后沿ED方向拉伸以及垂直于ED方向压缩屈服行为的影响。结果表明:在所研究的1%~9%压缩预变形范围内,不同预变形量对随后沿.ED方向拉伸的屈服影响几乎一样,都能使沿挤压方向拉伸屈服强度下降到约120 MPa,这几乎与沿挤压方向压缩屈服强度122 MPa一致;沿ED方向预压缩将导致垂直于ED方向压缩屈服强度显著增加,且不同预变形量对随后沿垂直于ED方向压缩的屈服行为影响几乎一致。造成不同施载方向屈服行为不一样的原因是不同施载方向孪生变体的最大施密特因子值不同。最大施密特因子值越大,孪生启动时的临界剪切应力越小,屈服强度也就越低。
The effects of compressive pre-deformation on subsequent tension along extrusion direction (ED) and compression perpendicular to ED were investigated in an extruded AZ31 Mg alloy. The results show that the subsequent tensile yield stress decreases to about 120 MPa irrespective of the prestrain from 1%to 9%. The tensile yield stresses of about 120 MPa for the samples subjected to pre-compression are nearly equal to that of compression along ED (about 122 MPa) for the sample without any prestrain. However, the pre-compression along ED leads to an obvious increase in the yield stress for subsequent compression perpendicular to ED. Different prestrains exhibit similar effects on the yielding behavior during subsequent compression perpendicular to ED. Because of the difference in the highest Schmid factors for{10 1 2} twinning, the samples exhibit different yielding behaviors under different strain paths. The critical resolved shear stress (CRSS) decreases with the increase of the highest S

[ 可能符合您检索需要的词汇 ]

进入期刊文章
通过在77K温度下进行不同变形量的低温轧制实验，研究了具有强烈单轴织构的工业纯锆板材在低温轧制变形条件下的孪生行为及变形机理。采用扫描电镜（SEM）和电子背散射衍衬（EBSD）分析和表征了变形材料的微观组织和织构。结果表明，在沿C轴加载的低应变条件下{1022}〈1123〉压缩孪生是主要的变形机制，同时在{1022}〈1123〉压缩孪晶中产生了二次孪晶（{10}-2}〈10T1〉拉伸孪晶）以协调变形。施密特因子计算及孪晶分布的EBSD模拟结果表明，在低温变形条件下的孪生模式的选择是由施密特因子的数值大小决定的。探讨并解释了轧制过程中随着应变量增加由孪生所导致的织构演变。
Industry pure zirconium sheets with a strong c-axis fiber texture were rolled to different strains at 77 K to investigate the twinning behavior and deformation mechanism. The microstructure and texture of the rolled specimens were characterized by scanning electron microscopy (SEM) together with electron backscatter diffraction (EBSD) techniques. The results show that the{1022}?1123? compression twinning mode is the dominant deformation twin at low strains loaded along the c-axis, and the{1012}?1011?tensile twinning generates as the second twin in {1022}?1123?twins. The selection of twinning modes is governed by Schmid factor (SF) due to the calculating of SF and the EBSD simulating of twinning distribution. The evolution of texture during rolling affected by twins with increase of the strain was explained.

[ 可能符合您检索需要的词汇 ]

进入期刊文章
采用CPLD芯片和单片机相结合方法实现对正弦波和方波信号的频率测量。硬件设计方面通过施密特触发器进行信号整形,再利用CPLD进行频率计数,然后将计得的数据传输到单片机中进行处理,最后用LCD1602液晶显示器显示结果。该文试图探讨基于CPLD和单片机的数字频率计的硬件电路设计。
Using CPLD chip and MCU combined with the method of frequency measurement of sine wave and square wave sig-nal. The hardware design of signal shaping by Schmidt trigger, then use CPLD frequency counting, data transmission and then counted to the microcontroller for processing, and finally LCD1602 LCD display results. This paper attempts to explore the hard-ware circuit design of digital frequency meter based on CPLD and mcu.

[ 可能符合您检索需要的词汇 ]

进入期刊文章
为观测同一电路不同点电信号的频率、幅值、相位等关系,需要多踪示波器同时显示多个信号波形。由线性运放、施密特触发器、十进制计数/脉冲分配器、模拟开关等能够构成单-四踪示波器转换系统。用波形变换与分频的方法获得触发信号,用模拟开关控制信号的切换,用线性运放对信号进行叠加与放大,再结合通用示波器,实现信号的多波形显示与观测,为电子测量提供了一种便捷、实用的方法。
In order to observe the relationship between frequency, amplitude and phase of the electrU signals at different nodes in the same circuit, it needs multi-signal oscilloscope to simultaneously display the several signal waveforms. The conversion sys-tem of single-four trace oscilloscope can be composed of the linear OpAmp, Decade Counter/Divider and analog Switch. With the method of waveform transformation and frequency division to obtain the trigger signal, analog switch to control signal switch-ing, linear OpAmp to stack and amplify the signal, combined with general Oscilloscope can realize the observation on multi-waveform so as to provide a convenient and useful method for electronU measurement.

[ 可能符合您检索需要的词汇 ]

进入期刊文章
为了实现对石墨烯霍尔器件的高精度检测,采用前端放大以及模数转换器技术,设计了一款模拟前端读出电路.该读出电路包括前端放大器、低压差线性稳压器件、施密特触发器以及10bit/1MHz逐次逼近模数转换器四大部分.读出电路芯片采用SMIC 0.18μm 1P6M标准CMOS工艺实现.后仿真结果显示,在电源电压3.3V,输入信号50kHz和1MHz时钟频率下,无杂散动态范围(SFDR)为71.294dB,信噪失真比(SNDR)达到59.538dB,有效精度(ENOB)达到9.59bit,可检测0.000 13T特斯拉的磁场变化,满足石墨烯霍尔器件的检测要求.
In order to realize the high resolution detection of grapheme hall element ,amplifier and analog-to-digital technique is adopted to design a analog front-end readout circuit .The circuit consists of amplifier ,low dropout regulator (LDO) ,Schmitt trigger and 10 bit/1 MHz Successive Approximation Analog-to-Digital Converter (SAR ADC) .The readout is implemented in SMIC 0 .18 μm 1P6M CMOS process .The post-simulation results show that in 3 .3 V power supply ,50 kHz input frequency and 1 M Hz clock frequency ,the SFDR is 71.294 dB ,SNDR is 59.538 dB ,ENOB is 9 .59 bit ,detection accuracy is 0 .00013 T ,meets the detection requirement of grapheme hall element .

[ 可能符合您检索需要的词汇 ]

进入期刊文章
针对飞机研制费用预测样本数据较少、影响因素复杂,单一预测方法预测质量不高的问题,采用组合预测方法预测飞机研制费用。组合了径向基函数(radial basis function,RBF)神经网络、格拉姆-施密特回归、偏最小二乘回归(partial least squares regression,PLSR)3种预测方法,基于样本数据建立了飞机研制费用组合预测模型,并与单项预测进行了对比分析。结果表明,组合预测具有满意和稳定的预测精度,并可以降低单项预测的质量风险,是飞机研制费用预测可靠而有效的方法。
To address the problems of scarce sample data,complex influence factors and low forecasting quality of a single prediction method in predicting the aircraft development costs,a combination forecasting method is adopted.Based on the sample data,the radial basis function (RBF)artificial neural network,Gram-Schmidt regression and partial least squares regression (PLSR)are combined to construct the combination fore-casting model,which is also compared with the single prediction method.The results show that the combination forecasting method has satisfactory and stable prediction accuracy,and it can reduce the quality risk of the single prediction method,so it is a reliable and effective method for aircraft development costs prediction.

[ 可能符合您检索需要的词汇 ]