查询词典 terrestrial current

In this thesis the process of constructing the non-perturbative Hamiltonian theory is de-scribed and is applied to estimate the vacuum condensate. It contains the following contents:At the very beginning, by using the path integral method and eliminating the gluon freedom, aGCM action 〓 of current quarks including lower order current-current coupling was derivedfrom the QCD Lagrangian and the effective Hamiltonian operator that could hardly be doneby the normal methods was derived. After doing this, the broken vacuum is introduced whichincludes quark-antiquark condensate through the generalized Bogoliubov-Valatin transformation,the effective Hamiltonian of constituent quark was derived. The detailed formulas containingthe spatial current-current coupling term for the effective Hamiltonian and gap equations wasworked out by parameterizing the correlation kernel as a quadratic potential. And then, the gapequation was solved and the quark-antiquark condensate of vacuum was studied both in the casesof instantaneous interaction and retarded interaction. In the end, the effective Hamiltionian withtwo-body quark-quark interaction was derived with one-body approximation, and with the helpof the functional integral method the coupling non-linear dynamic equations for systems withnuclear matter was derived. Finally, these equations were solved by selfconsistent method andthe effect of nuclear matter on vacuum condensate was studied. The spatial current-current coupling term is too difficult to handle, hence the correlationkernel is assumed to be not important and usually omitted in the pure vacuum condensate, andthe instantaneous interaction generally is adopted. Retaining the spatial current-current termand partial retardation effect, the quark pairs condensate in pure vacuum was studied, and theeffect of quark mass was also studied. At present, little study is focused in the case with nuclearmatter and spatial current-current term also omitted. Under the approximation with partialspatial current-current term, the effect of nuclear matter on vacuum condensate was studied.

本论文描述了量子色动力学整体色对称模型哈密顿量方法的构建过程，得到了反映正反夸克对凝聚真空结构的关于组分夸克的有效哈密顿量算符，它隐含了胶子作用，并且准确至流-流耦合项；接着，通过参数化哈密顿量中的夸克作用关联核，导出平方禁闭势参数化选择的哈密顿量的具体公式和能隙方程；随后，应用公式，编程求解，考察了瞬时作用下和部分延迟作用下真空的正反夸克对凝聚，在计算中保留了空间流-流耦合作用；之后，导出瞬时势和延迟势下包含二体作用项的哈密顿量公式，并采用单体化近似，通过泛函变分方法得到核物质存在时耦合的非线性动力学方程；在保留部分空间双流耦合作用的近似下，求解核物质的动力学方程，考察核物质密度对真空凝聚的影响，以往考察真空凝聚，对关联核的选用，由于空间流-流耦合项不易处理，也认为作用不大，常忽略该项，并且常采用瞬时作用；本文保留空间双流项和部分延迟作用，考察了真空情形的夸克对凝聚，还考察了夸克质量对纯真空凝聚的影响，以往对核物质存在情形的真空凝聚考察很少，也都忽略空间流-流项，本文在考虑部分空间流-流项近似下，考察了核物质存在对真空凝聚的影响。

Fix a super intense magnet at the north pole of the terrestrial globe, the top of the terrestrial globe is the magnetic field controller which senses the distance between the terrestrial globe and the controller through the sensor; when the distance becomes shorter, the controller will automatically reduce the magnetic field; on the other hand, when the distance becomes greater, the controller will automatically increase the magnetic field and, in this way, guarantee a certain distance between the terrestrial globe and the controller.

在地球仪的北极固定一个超强磁铁，地球仪上面是磁场控制器，通过传感器感知地球仪与控制器的距离。

Whole-cellpatch-clamp technology demonstrated that VDPG (1g/L) had notsignificant effects on the delayed-rectified K~+ current, TTX-sensitive Na~+ current and high-voltage-activated Ca~(2+) current of rat dorsalroot ganglion cells. The fast transiet K~+ current of cottonbollworm dorsal DUM cells, the fast transiet K~+ current, Na~+ current andhigh-voltage-activated Ca~(2+) current of Periplaneta Americana dorsalunpaired median cells were also not significantly affected byVDPG at the same concentration. However, VDPG had significant effecton the fast transiet K~+ current of Pieris rapae. The VES had not significanteffects on the high-voltage-activated and low-voltage-activated Ca~(2+)current of rat DRG cells.

膜片钳电生理实验显示1g／L毒囊粗毒对蜚蠊DUM神经元的快瞬时钾电流、钠电流、高电压激活的钙电流，对棉铃虫快瞬时钾电流和大鼠DRG细胞延迟整流钾电流、TTX-S型钠电流、高电压激活的钙电流均无明显作用，却对菜青虫快瞬时钾电流有明显作用；电刺激粗毒对大鼠DRG细胞低电压和高电压激活的钙通道无明显作用。

To meet the needs for scientific, technological and socio-economic development in China, we proposed the four areas that the Chinese scientists should focus their study of global change and terrestrial ecosystems in future, including:(1) Metabolism and coupling mechanism of key life elements in terrestrial ecosystems in China;(2) Implications of terrestrial ecosystems in areas sensitive to global change and in important transects on global change;(3) Interactions between biogeochemical cycle of C, N, P, S in China and global change; and (4) Development of regional dynamic vegetation model which meets the actual needs of China.

中国学者在全球变化与陆地生态系统研究领域也开展了许多工作并取得了重要成绩。按照我国科学技术和社会经济发展的需求，本文提出了未来我国在该领域的研究重点，包括（1）中国陆地生态系统重要生命元素的代谢及其耦合机制研究；（2）全球变化敏感区域或重要样带上陆地生态系统对全球变化的影响研究；（3）我国的C、N、P、S生物地球化学循环与全球变化的关系研究；（4）发展中国特色的区域植被动态模型。

To meet the needs for scientific, technological and socio-economic development in China, we proposed four areas on which the Chinese scientists should focus their study of global change and terrestrial ecosystems in future, including:(1) Metabolism and coupling mechanism of key life elements in terrestrial ecosystems in China;(2) Implications of terrestrial ecosystems in areas sensitive to global change and in important transects on global change;(3) Interactions between biogeochemical cycle of C, N, P, S in China and global change; and (4) Development of regional dynamic vegetation model which meets the actual needs of China.

中国学者在全球变化与陆地生态系统研究领域也开展了许多工作并取得了重要成绩。按照我国科学技术和社会经济发展的需求，提出了未来我国在该领域的研究重点，包括①中国陆地生态系统重要生命元素的代谢及其耦合机制研究；②全球变化敏感区域或重要样带上陆地生态系统对全球变化的影响研究；③我国的C、N、P、S生物地球化学循环与全球变化的关系研究；④发展中国特色的区域植被动态模型。

It is dedicated to education and research focusing on a wide diversity of research areas, including the quantitative population ecology of plants and small mammals, terrestrial plant community ecology, grassland biodiversity and restoration ecology, plant fungal pathogen dynamics and population biology, successional changes in terrestrial insect communities, terrestrial ecosystem ecology, the remote sensing of natural resources, life history theory, molecular evolution in vascular plants, evolutionary and theoretical population genetics, theoretical ecology, and limnology and aquatic ecology, basic biology of insects, Ecophysiology; paleobotany; population genetics, evolution of plants and fungi.

其主要致力于生态学和进化生物学的教育和研究，主要学科领域包括植物和小型哺乳动物种群生态学、陆地植物群落生态学、牧草生物多样性和恢复生态学、植物真菌病原动力学和种群生物学、陆地昆虫群落连续改变、陆地生态系统生态学、自然资源遥感、生命史理论、维管束植物分子进化、进化和理论种群遗传学、理论生态学、湖沼学和水生动物生态学、基础昆虫生物学、生态生理学、古植物学、种群遗传学、植物和真菌的进化等。

This invention concerns a current control process for a feed-in voltage converter, wherein a detected flux-inducing current component and a detected torque-inducing currrent component of an actual currrent vector of a rotating field machine are each controlled for a flux-inducing current component set value and a torque-inducing current component set value of the rotating field machine. To that effect, a control set-value (DELTA u*sp, DELTA u*sq) is determined, dependent each time upon a determined current component control deviation. From these, current components of an actual current vector are formed each time by overlay of a formed pilot value (u*spvor, u*sqvor). This invention also concerns a device for carrying out this process.

本发明涉及一种用于馈入电压式变流器的电流调节方法，其中分别将所检测的一感应式电机的一实际电流向量（i s 的磁通感应电流分量和一转矩感应电流分量i sq ）调节至该感应式电机的一额定电流向量的一磁通感应分量额定值和一转矩感应电流分量额定值，在这种情况下，分别根据所检测的一电流分量调节偏差计算出一调节器调节量（△u * sp ，△u * sq ），由这两个调节器调节量分别通过叠加所形成的一预控制量（u * spvor ，u * sqvor ）形成一额定电压向量的电压分量（u * sp ，u * sq ），本发明还涉及一种用于实施该方法的装置。

Assuming that half of the carbon loss in the degraded terrestrial ecosystem in current forest and grass areas are restored during the next 50 years or so, the terrestrial ecosystem in China may sequestrate～12.0Pg of organic carbon from the atmosphere, which represents a considerable offset to the industry's CO〓 emission.

5在现有的气候条件下，未来50年或更长的时间上，如果我们能通过有效的土地利用措施使我国现有林地和草地面积上的生态系统碳损失量恢复其中的1/2，那么我国陆地生态系统将具有～12.0Pg C的碳汇潜力。

In summary, the drive current by Alfvén waves can be enhanced by plasma rotation The negative magnetic shear is favorable for the efficiency of the current drive by Alfvén waves Moreover, in the reversed shear configuration the current drive due to Alfvén waves in an rotation plasma can obviously change the plasma current profile The Alfvén wave current drive may be useful in controlling the current profile in order to suppress magnetohydrodynamic instabilities.

另外，我们还发现负剪切区域愈大，同时安全因子极小值q〓愈小，对阿尔芬波电流驱动愈好。总之，等离子体极向旋转能够增强阿尔芬波电流驱动，负磁剪切对阿尔芬波电流驱动是有利的。另外，反磁剪切位形下旋转等离子体的阿尔芬波电流驱动可以明显改善等离子体电流剖面。

The topic research, standard device for resistive current tester for zinc oxide surge arrester, can be used for calibration for resistive current tester for zinc oxide surge arrester. The equip functions involve: total current, resistive component of current, capacitance component of current, active power, reference voltage, phase angle, harmonic component of current.

课题研制的氧化锌避雷器阻性电流测试仪标准装置可用于开展氧化锌避雷器阻性电流测试仪的校准工作，项目涉及：全电流、阻性电流、容性电流、有功功率、参比电压、相位角、各次谐波电流分量。

Effective local search tactics reaches local searchers when they are ready to buy - with every way that it is possible for them to buy from you.

有效的地方搜索策略达到当地的搜索，当他们准备购买-以各种方式，这是他们有可能从您那里进行购买。

The first two are periodic sentences for their beginnings; and the fifth and the last are also periodic sentences each for the embedding of a parenthetic structure.

1960年代中后期，当战后女权主义和当时的许多其他抗议运动在西欧和北美发展成某种势力时，性别的概念演绎成补充和延伸生物性别差异的概念。