共查询到20条相似文献，搜索用时 453 毫秒
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253.positionn.位置;职位;状态v.安置;确定……的位置Before the debate,both sides made their positions clear.辩论之前,双方都把自己的观点说清楚。She carefully positioned the cup on the edge of the shelf.她把杯子小心地放在架子边。The house has a very good position.这所房子处于一个很好的位置。习惯用语people of position有身份的人们go/get into position进入阵地fall into the position of陷于某种地位in position在适当的位置,适得其所out of position在不适当的位置,不得其所take up the position that主张,认为254.possessionn.财产;所有,拥有He was found in possession of dangerous drugs.她被发现藏有危险物品。He lost all his possessions inthe fire.他在... 相似文献
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Wendy Franklin 《英语沙龙》2010,(5):11-11,49
Identifiable
A number of inmates were in a police lineup arranged according to their height. Joe stood exactly in the middle while his jail-mate Rick, who was taller, was in the 13th position and another, Fred who was even taller, was at the 20th position. 相似文献
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In this study, nine simplified short composite columns consisting of core CFST (concrete filled steel tube) of different diameters and outer reinforced concrete were constructed to study their compressive performance under axial or eccentric compression. The failure mode is characterized by the crush of the outer concrete. The bearing capacity increases at first and then decreases with further increase of the position coefficient. It can be concluded that position coefficient is an important structural parameter that has considerable influences on the ultimate bearing capacity of the composite columns. The outer concrete, steel tubes and longitudinal reinforcement are found to work in a cooperative manner under axial or eccentric compression when the position coefficient is about 0.5. An improved bearing capacity algorithm that takes the position coefficient into account has been proposed based on the experimental and simulation results and current technical specification in China. It has been proven to be precise and safe. 相似文献
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(in a fortunate position)A: I heard that Michael and Jennifer got a good price when they sold their house.B: Yes, they did. Now they're really sitting pretty. As a matter of fact, they're thinking ofgoing on a long vacation. A: I wish I were in such a fortunate position. 相似文献
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In traditional translation theories, the author and the translator, the original text and the translated text are in the binary oppositions. Both author-centeredness and text-centeredness are in authoritative positions. Moreover, there are some incorrect viewpoints about the translator’s position in the traditional translation theories. In this case, this paper will analyze the translator’s position in the traditional translation theories comprehensively. 相似文献
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Because brushless direct current (BLDC) motors have the advantages of a compact size, high power density, high efficiency, and long operating life time, they are widely used in many industrial products and electric traction systems. It is known that the BLDC motors have no brushes for commutation. They are commutated with electronically commutation. So, the rotor position information of the BLDC motors must be known to understand which winding will be energized according to the energizing sequence. In most of the existing BLDC motor drivers, rotor position information is detected by Hall effect sensors. This kind of mechanical position sensors will bring additional connections and costs, reliability decrease and noise increase. In order to improve the control performance and extend the range of speed regulation for BLDC motors, a position sensorless control method is proposed in this paper. In the proposed control method, rotor position information of the BLDC motors is detected from the back electromagnetic forces (back-EMFs) which are estimated by an unknown-input observer with line to line currents and line to line voltages. For the purpose of verifying the effectiveness of the proposed control method, a model is built and simulated on the Matlab/Simulink platform. The simulation results show that the speed regulation performance of BLDC motors is improved compared with using Hall effect sensors. At the same time, the reliability of the BLDC motors is improved and the costs of them are reduced because the position sensor is eliminated. 相似文献
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An approach of position sensorless control for permanent magnet synchronous motor （ PMSM ） is put forward based on a sliding mode observer. The mathematical model of PMSM in a stationary αβ reference frame is adopted, and the system is controlled by the digital signal processor （ DSP; TMS320LF2407 according to the control achieve closed loop operation of the motor, the stator theory of sliding mode observer. In order to magnetic field should be vertical with the rotor magnetic field and be synchronous with rotor rotating, so the position and speed of PMSM is estimated in real time and the estimated position is modified continuously. The simulation results indicate that the proposed observer has high precision is more robust to the parametric variation and load in estimation of PMSM position and speed, and torque disturbance. 相似文献
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Rune J. Krumsvik 《美中教育评论》2008,5(9):1-16
This position paper highlights existing and emerging, prospective digital divides in Norwegian schools and asks whether we are now moving from traditional digital divides to digital inequality in our digitized society and schools. Despite very good technology density in Norwegian society and schools in general, there is the reason to pay attention to whether this situation creates new kinds of digital inequalities among already vulnerable pupil groups. Therefore, this position paper focuses on whether under the new Norwegian educational reform. The Knowledge Promotion, it is necessary to consider this issue from another angle because of e.g. the increased status of digital literacy and implementation of ICT-based （Information and Communication Technology） exams in the national curriculum. The position paper focuses on what kind of digital inequalities we see the profiles of and what issues the government has to consider to prevent these tendencies escalating. 相似文献
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Confucius’doctrines had great influence on Chinese history.Han Wudi rejected other schools of thoughts but held Confucianism in esteem and so its leading position in Chinese history was established.Its influence was so extensive in China that the Analects of Confucius is indispensable even now,either for studies on Confucius himself or for studies in Chinese history.For thousands of years,Confucianism has exerted a far-reaching influence on Chinese society,culture and on the Chinese psychology.Its influence has extended abroad and Confucianism has held a leading position in the world. 相似文献
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何素秀 《第二课堂(小学)》2010,(11):26-29
1．I’m calling to enquire about the position＿＿in yesterday’s China Daily．（2010年北京卷） 相似文献
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A neural-statistical approach to the reconstruction of novel viewpoint image general regression neural networks(GRNN) is presented.Different color value will be obtained by watching the same surface point of an abject from different viewpoints due to specular reflection,and the difference is related to the position of viewpoint.The relationship between the position of vewpoint and the color of image is non-linear,neural network is introduced to make curve fitting,where the inputs of neural network are only a few calibrated images with obvious specular reflection.By training the neural network,network model is obtained.By inputing an arbitrary virtual viewpoint to the model,the image of the virtual viewpoint can be computed.By using the method presented here,novel viewpoint image with photo-realistic property can be obtained,especially images with obvious specular reflection can accurately be generated.The method is an image-based rendering method,geometric model of the scene and position of lighting are not needed. 相似文献
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HAO Dong-ze 《海外英语》2015,(1)
Learning motivation occupies an important position in non-intelligence factors,as it plays a pivotal role in university students’ successful completion of their studies and strengthening of professiona... 相似文献
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WANG Dong-mei 《海外英语》2013,(7)
Cooperative learning in spoken English teaching process occupies an important position. It is a relatively new teaching method to provide students with more opportunities to speak English, to reduce ... 相似文献
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The key of speed sensorless vector control system lies in the accurate orientation of magnetic field. In some field-oriented algorithms, the integrator of observers and the dead-time effect bring in system errors during the estimation of field position. In this paper, a saturated feedback integrator is used, and the dead-time effect is compen-sated by current positive feedback. Experiments were carried out on the hardware platform of MCK2407, with chip TMS320LF2407 from TI Company. The results show that the proposed method is simple and effective, and the accuracy of field position is improved. 相似文献
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人有哪些属性？人的本质属性是什么？人有众多属性,各属性的地位是不断变化的,处于主导地位的属性就成了人的本质属性。人有物质属性又有意识属性,有生物属性又有社会属性,有情感属性又有理智属性,有客观被动性又有主观能动性,有相对静态性又有动态变化性,有必然性又有自由性,有动机属性又有行为属性,有共性又有个性……人是具有多维属性构成的矛盾统一生物体。由于事物的结构特点决定事物的性质,每个人各属性的比重不同,组合特点不同,这样,个人的性质也就有了差异。如何考量个人的本质属性？笔者认为,个体的本质由其社会背景属性、主导动机属性,重要行为效果的属性,三者共同决定。 相似文献
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张秀国 《淮阴师范学院学报(哲学社会科学版)》1988,(2)
1.表强调的位置之一。任何一个具有一定长度的英语句子,都有其句首(initial position)、句中(medial posi-tion)和句末(end position)。但是人们在交际中往往一句话只传递一个最重要的信息,那么表达这一信息的词或词组等通常放在哪一个位置上呢?末端中心(end focus)原则告诉我们,人们往往把最重要的信息置于句末。因此,句末是重要的、表示强调的位置。例如,在直接 相似文献
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人有哪些属性?人的本质属性是什么?人有众多属性,各属性的地位是不断变化的,处于主导地位的属性就成了人的本质属性。人有物质属性又有意识属性,有生物属性又有社会属性,有情感属性又有理智属性,有客观被动性又有主观能动性,有相对静态性又有动态变化性,有必然性又有自由性,有动机属性又有行为属性,有共性又有个性……人是具有多维属性构成的矛盾统一生物体。由于事物的结构特点决定事物的性质,每个人各属性的比重不同,组合特点不同,这样,个人的性质也就有了差异。如何考量个人的本质属性?笔者认为,个体的本质由其社会背景属性、主导动机属性,重要行为效果的属性,三者共同决定。 相似文献