Approximating a spectral envelope via regularized discrete cepstrum coefficients has been proposed by previous researchers. In this paper, we study two problems encountered in practice when adopting this approach to estimate the spectral envelope. The first is which spectral peaks should be selected, and the second is which frequency axis scaling function should be adopted. After some efforts o...

There are many factors that affect the change of room temperature, especially outdoor environmental factors, which makes it difficult to establish a model describe dynamic changes real time temperature. In response this problem, study proposes RC network two-node wall structure method and analyze heat conduction process building envelope. With method, we first divide envelope such as walls floo...

a r t i c l e i n f o The Ratio of Equivalent Transparency (Req) is a basic index for assessing whether a building is energy-efficient in Taiwan. Req is the ratio of the area of total building envelope and the area of envelope equivalent transparency. Calculation of Req requires not simply the consideration of natural factors such as building location, direction, ambient lighting and sunshine, ...

A considerable part of recent EU policies is currently addressed at developing effective measures to support the transition towards a low carbon society according to the principles and goals of Roadmap to 2050. In this general framework the links between the development of low-emission strategies and climate-resilient approaches to buildings play a key role. As most part of the existing buildin...

background and aims: infectious bronchitis virus (ibv) is the etiological agent of infectious bronchitis (ib), which is an acute and highly contagious disease of the respiratory and sometimes the urogenital tracts of chickens. in iran, the disease has been identified in chicken flocks with serological and virus isolation methods. gene 3c (e) encode envelop (small membrane) protein. for envelope...

Convective heat transfer on the exterior surface of building envelope is an important component for energy consumption. The calculation consumption depends convective coefficient (CHTC) envelope. existing research does not fully consider effects airflow field around CHTC different surfaces. In this paper, relationships between and influence factors were investigated isolated building. Response ...

The paper presents a simplified conceptual model for energy demand calculations based on building envelope characteristics, thermal mass and local climate. It is network lumped analysis of the dynamic process. Characteristic parameters buildings are suggested; Driving temperature (DT), difference, (DTD), External Load Temperature (ELT), Thermal Resistance (TLR). Building Envelope Performance (B...