Asymmetric design for Compound Elliptical Concentrators (CEC) and its geometric flux implications
The asymmetric compound elliptical concentrator (CEC) has been a less discussed subject in the nonimaging optics society. The conventional way of understanding an ideal concentrator is based on maximizing the concentration ratio based on a uniformed acceptance angle. Although such an angle does not exist in the case of CEC, the thermodynamic laws still hold and we can produce concentrators with the maximum concentration ratio allowed by them. Here we restate the problem and use the string method to solve this general problem. Built on the solution, we can discover groups of such ideal concentrators using geometric flux field, or flowline method.
Objective To evaluate the effectiveness of feng's point-fixing spine rotating reduction manipulation combined with Chinese traditional medicine herbs external appliance on treatment of cervical spondylotic radiculopathy.Methods 134 cases suffering cervical spondylotic radiculopathy entered into the study were randomized into two groups :group Ⅰ(68 cases) group Ⅱ(66 cases).Group I were treated with feng's point-fixing spine rotation manipulation combined with CTM herbs external appliance,while group Ⅱ with computered traction coupled with direct current-induced CTM herbs.Results Statistical analysis demonstrates that group Ⅰ is very significant difference from group Ⅱ(P0.05).Conclusion Feng's manipulation ,which can recover the balance and stableness of the cervical spine,is an effective for the cervical spondylotic radiculopathy treatment.