Zhaorong Liu

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Trachea is the unique passage for air to flow in and out. Its tone is of importance for the respiration system. However, investigation on how tracheal tone changes due to asthma is limited. Aiming at studying how the mechanical property changes due to asthma as well as the compliance and flow limitation, the following methods are adopted. Static and passive(More)
To investigate short-term effects of ambient ozone exposure on mortality in Chinese cities, we conducted a meta-analysis of 10 effect estimates of 5 short-term studies, which reported associations between ambient ozone and mortality in Chinese mainland cities. And we estimated pooled effects by non-accidental mortality, cardiovascular mortality, and(More)
The no-load state and zero-stress state of the normal rat trachea were analyzed. It was found that there exist compressive residual strains in the inner wall region of the rat trachea and tensile residual strains in the outer wall region. The fact that the opening angle of the rat trachea cut at the cartilaginous region is significantly larger than that cut(More)
The parallel-plate flow chamber (PPFC) with rectangular shape, of which the height is far smaller than its own length and width, is one of the main apparatus for in vitro studies of the mechanical behavior of the cells. Considering that the Reynolds numbers of flows in the usually used PPFCs are small, a perturbation solution of laminar pulsatile Casson(More)
To combat the effect of multi-path fading, Rake receivers are used in conjunction with code division multiple access (CDMA) systems. In this paper, we main introduce the finger assignment method for Rake receivers. First, we will simply review the Rake receiver. Then we will investigate several kinds of finger assignment method in single cell and multi-cell(More)
This paper introduces a new method, termed Twice Cutting, for obtaining the zero-stress states of cartilage and muscle of trachea. The method applied cuts at the two junctions of tracheal cartilage and muscle perpendicular to the tangent lines of cartilage at its tips. The cartilaginous and muscular opening angles are defined for the first time in Twice(More)
In this paper, we investigate a finger combining scheme to save the power consumption of mobile rake receiver without the performance loss. The proposed scheme is called as GSEC(Generalized Switch-and-Examine Combining) with an output threshold which selects any branches whose SNR is above an input-threshold until the combined SNR is larger than an(More)
Particles with aerodynamic diameters <10 microm (PM(10)) and particles with aerodynamic diameters <2.5 microm (PM(2.5)) were sampled during summer 2006 in Beijing and mass concentrations, water-soluble ionic compounds concentrations, and acidic buffer capacity were analyzed. Results show that the mass concentration ranges of PM(10) and PM(2.5) were from(More)