搜索结果: 1-15 共查到“Helical”相关记录32条 . 查询时间(0.078 秒)
A technique which can detect a growing pulmonary malignancy when it is small should allow more effective therapy and a better outcome for patients. Henschke and her colleagues in the Early Lung Cancer...
Helical Ordering in Chiral Block Copolymers
Block copolymers Chiral Helical Microphase separation Polylactide Self-consistent field theory
2014/11/21
The phase behavior of chiral block copolymers (BCPs*), namely, BCPs with at least one of the constituent block is formed by chiral monomers, is studied both experimentally and theoretically. Specifica...
Magnetic nanocubes self-assemble into helical superstructures （图）
Magnetic nanocubes self-assemble helical superstructures
2014/9/12
Nanoparticles of magnetite, the most abundant magnetic material on earth, are found in living organisms from bacteria to birds. Nanocrystals of magnetite self-assemble into fine compass needles in the...
On the modelling of spur and helical gear dynamic behaviour
the modelling of spur helical gear dynamic behaviour
2012/4/24
This chapter is aimed at introducing the fundamentals of spur and helical gear dynamics. Using three-dimensional lumped models and a thin-slice approach for mesh elasticity, the general equations of m...
The helical phase of chiral nematic liquid crystals as the Bianchi VII(0) group manifold
The helical phase chiral nematic liquid crystals the Bianchi VII(0) group manifold
2011/9/13
We show that the optical structure of the helical phase of a chiral nematic is naturally associated with the Bianchi V II0 group manifold, of which we give a full account. The Joets-Ribotta metric gov...
On the application of radio frequency voltages to ion traps via helical resonators
radio frequency voltages ion traps helical resonators
2011/9/6
Ions confined using a Paul trap require a stable, high voltage and low noise radio frequency (RF) potential. We present a guide for the design and construction of a helical coil resonator for a desire...
Modelling the helical-flexo-electro-optic effect
helical-flexo-electro-optic effect flexoelectric coupling electric fields
2011/8/18
Abstract: The helical-flexo-electro-optic effect shows interesting in-plane electro-optic switching behaviour due to flexoelectric coupling with applied electric fields. Previous understanding of the ...
The helical phase of chiral nematic liquid crystals as the Bianchi VII(0) group manifold
chiral nematic liquid crystals the Bianchi VII(0) group manifold Soft Condensed Matter
2011/7/27
Abstract: We show that the optical structure of the helical phase of a chiral nematic is naturally associated with the Bianchi VII(0) group manifold. The Joets-Ribotta metric governing propagation of ...
Design and Modeling on Stranded Wires Helical Springs
stranded wires helical spring mathematical model finite element analysis
2011/8/4
A stranded wires helical spring is formed of a multilayer and coaxial strand of several wires twisted together with the same direction of spiral. Compared with the conventional single wire spring, the...
Design and Modeling on Stranded Wires Helical Springs
stranded wires helical spring mathematical model finite element analysis
2011/8/4
A stranded wires helical spring is formed of a multilayer and coaxial strand of several wires twisted together with the same direction of spiral. Compared with the conventional single wire spring, the...
斜齿轮成形磨削砂轮修形与仿真（Form Grinding Wheel Dressing and Simulation for Helical-gear）
斜齿轮 成形磨削 砂轮廓形 修形
2010/12/28
根据斜齿轮成形磨削过程中砂轮与齿轮之间的运动关系，建立了斜齿轮成形磨削的数学模型；通过推导成形砂轮与被加工齿面的接触条件方程，得出了成形砂轮的理论廓形，推导出砂轮廓型的等距曲线。设计了成形砂轮数控修形和数值模拟仿真软件，用于修整磨削任意参数斜齿轮的成形砂轮和检验砂轮的修形精度。斜齿轮磨削试验验证了修形理论的正确性和修形软件的有效性。
Helical modes in carbon nanotubes generated by strong electric fields
Helical modes carbon nanotubes generated
2010/11/23
Helical modes, conducting opposite spins in opposite directions, are shown to exist in metallic
armchair nanotubes in an all-electric setup. This is a consequence of the interplay between spinorbit i...
Helical Edge Modes near Transition to Topological Insulator with Indirect Gap
topological insulator edge mode indirect gap particle-hole symmetry semimetal annihilator
2010/11/19
Helical edge modes are characteristic of topological insulators in two dimensions. This paper
demonstrates that helical edge modes remain across transitions to ordinary insulators or to semimetals un...
Study of a Large Helical Eruptive Prominence Associated with Double CME on 21 April 2001
Sun: prominence Coronal Mass Ejection
2010/9/17
Here we present a preliminary analysis of a helical eruptive prominence at the east limb of the Sun on 21 April 2001. Unusually this eruption is associated with a double CME. We have tried to study th...
Investigation of a Design Modification for Double Helical Gears Reducing Vibration and Noise
tooth profile modification tooth longitudinal modification double helical gears loaded transmission error
2011/9/9
To reduce vibration and noise and increase transmission efficiency, a three segment method for modifying the pinion profile was proposed. Cutter surface equations were deduced by changing the shape of...