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| 1 | Hopf-flip bifurcation of high dimensional maps and application to vibro-impact systems显示文摘This paper addresses the problem ofHopf-flip bifurcation of high dimensional maps. Using the center manifold theorem, we obtain a three dimensional reduced map through the projection technique. The reduced map is further transformed into its normal form whose coefficients are determined by that of the original system. The dynamics of the map near the Hopf-flip bifurcation point is approximated by a so called 'time-2τ2 map' of a planar autonomous differential equation. It is shown that high dimensional maps may result in cycles of period two, tori T1 (Hopf invariant circles), tori 2T1 and tori 2T2 depending both on how the critical eigenvalues pass the unit circle and on the signs of resonant terms' coefficients. A two-degree-of-freedom vibro-impact system is given as an example to show how the procedure of this paper works. It reveals that through Hopf-flip bifurcations, periodic motions may lead directly to different types of motion, such as subharmonic motions, quasi-periodic motions, motions on high dimensional tori and even to chaotic motions depending both on change in direction of the parameter vector and on the nonlinear terms of the first three orders. | Jianhua Xie Wangcai Ding E.H. Dowell L. N. Virgin | 2005 | Acta Mechanica Sinica2005，21，4： | 9 |
| 2 | Anemia and iron deficiency in gastrointestinal and liver conditions显示文摘Iron deficiency anemia(IDA) is associated with a number of pathological gastrointestinal conditions other than inflammatory bowel disease, and also with liver disorders. Different factors such as chronic bleeding, malabsorption and inflammation may contribute to IDA. Although patients with symptoms of anemia are frequently referred to gastroenterologists, the approach to diagnosis and selection of treatment as well as follow-up measures is not standardized and suboptimal. Iron deficiency, even without anemia, can substantially impact physical and cognitive function and reduce quality of life. Therefore, regular iron status assessment and awareness of the clinical consequences of impaired iron status are critical. While the range of options for treatment of IDA is increasing due to the availability of effective and well-tolerated parenteral iron preparations, a comprehensive overview of IDA and its therapy in patients with gastrointestinal conditions is currently lacking. Furthermore, definitions and assessment of iron status lack harmonization and there is a paucity of expert guidelines on this topic. This review summarizes current thinking concerning IDA as a common co-morbidity in specific gastrointestinal and liver disorders, and thus encourages a more unified treatment approach to anemia and iron deficiency, while offering gastroenterologists guidance on treatment options for IDA in everyday clinical practice. | Jürgen Stein Susan Connor Garth Virgin David Eng Hui Ong Lisandro Pereyra | 2016 | World Journal of Gastroenterology2016，22，35： | 5 |
| 3 | Accuratenumerical integration of state-space models for aeroelastic systemswith free play显示文摘 | Conner MD Virgin L N DowellEH | 1996 | AIAA Journal1996，34，10： | 1 |
| 4 | Late expression of a βchemokine homolog by murine cytomegalovirus 显示文摘 | Li X Y Virgin H W | 1997 | J Virol1997，71，： | 1 |
| 5 | Nonlinear behavior of a typical airfoil section with control surface freeplay:a numerical and ex-perimental study显示文摘 | Conner M D TangD M Dowell E H Virgin L N | 1997 | Journal of Fluids and Structures1997，，11： | 1 |
| 6 | Limit cycle behavior of an airfoil with a control suface显示文摘 | Tang D M Dowell E H Virgin L N | 1998 | Journal of Fluids and Structures1998，，12： | 1 |
| 7 | The onset of chaotic motions of a moored semi-submersible显示文摘 | Bishop S R Virgin L N | 1988 | Journal of OMAE1988，110，： | 1 |
| 8 | Autophagy in immunity andinflammation显示文摘 | Levine B Mizushima N Virgin HW | 2011 | Nature2011，469，7330： | 1 |
| 9 | Autophagy in immunity and inflammation显示文摘 | Levine B Mizushima N Virgin HW | 2011 | Nature2011，469，7330： | 1 |
| 10 | Solution structure of the BHRF1 protein from Epstein-Bart virus, a homolog of human Bcl-2显示文摘 | HUANG Q PETROS A M VIRGIN H W | 2003 | J Mol Biol2003，332，5： | 1 |
| 11 | Catchment regions of multiple dynamic responses in nonlinear problems of offshore mechanics显示文摘 | Virgin L N Bishop S R | 1990 | Journal of OMAE1990，112，： | 1 |
| 12 | Resonance of a harmonically forced Duffing oscillator with time delay state feedback显示文摘 | Hu H Y Dowell E H Virgin L N | 1998 | Nonlinear Dynamics1998，15，4： | 1 |
| 13 | Autophagy genes in immunity 显示文摘 | Virgin HW Levine B | 2009 | Nat Immunol2009，10，5： | 1 |
| 14 | Autophagy in immunity and inflammation显示文摘 | Levine B Mizushima N Virgin H W | 2011 | Nature2011，469，7330： | 1 |
| 15 | Autophagy in immunity and inflammation显示文摘 | Levine B Mlzashima N Virgin HW | 2011 | Nature2011，469，7330： | 1 |
| 16 | The nonlinear rolling response of a vessel including chaos motions leading to capsize in regular sea显示文摘 | Virgin L N | 1987 | Applied Ocean Research1987，9，2： | 1 |
| 17 | Autophagy in immunity and inflammation显示文摘 | Levine B Mizushima N Virgin H W | 2011 | Nature2011，469，7330： | 1 |
| 18 | Autophagy in immunity and inflammation 显示文摘 | Levine B Mizushima N Virgin HW | 2011 | Nature2011，469，7330： | 1 |
| 19 | Autophagy genes in immunity显示文摘 | Virgin HW Levine B | 2009 | Nat Immunol2009，10，5： | 1 |
| 20 | Autophagy in immunity and inflammation显示文摘 | Levine B Mizushima N Virgin H W | 2011 | Nature2011，469，7330： | 1 |
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