An Integrated System of Text Mining Technique and Case-based Reasoning (tm-cbr) for Supporting Green Building Design
Green building has been commonly accepted as an important strategy adopted by governments around the world for mitigating climate change and energy shortage problem. However, the selection and application of green building technologies under different situations usually puzzles designers, although various advanced technologies for green building are available. This study therefore introduces an integrated system of text mining and case-based reasoning (TM-CBR) to help designers retrieve the most similar green building cases for references when producing design for new green buildings. It is the first attempt in this study to integrate text mining technique into a CBR system to improve the efficiency of decision making in green building design. There are two major components of TM-CBR, case representation and case retrieval. Two kinds of case features, namely, identified features and textual features are used collectively to represent a green building case. Four value formats are considered to measure local similarity in the process of case retrieval. Seven cases are chosen randomly from 71 LEED collected cases as the target cases to test the effectiveness of the TM-CBR system. This study provides a new approach to retrieve the successful experience from similar previous cases to improve the effectiveness and adequacy of green building design.
Quantum Calculation on Zero-point Vibration Energy of Solid Argon
According to quantum theory, the particles must still vibrate when the temperature decreases absolute zero. Otherwise, if the particles completely stop, its momentum and position can be accurately measured simultaneously, which is against the uncertainty principle. The energy of the particle's vibration at absolute zero is zero-point vibration energy(ZPE). It is clean, cheap energy and nature's "free lunch" for mankind. If ZPE can be extracted, it will undoubtedly be the best energy that can be used by humans.
Therefore, based on the first principles, using the many-body expansion theory and Hartree-Fock SCF method, we calculate the relations among the zero-point vibration energy and atomic displacement of deviating from the equilibrium position, vibration frequency, molar volume of fcc solid argon in the atomic distance of 2.3-4.0Å, then obtain the Gruneisen coefficient and the zero-point vibration pressure. It is included that the motion of atoms around equilibrium positions can be thought as approximate harmonic vibration. The larger the molar volume of solid argon is, the greater the vibration frequency and zero-point vibration energy are. With the increase of the molar volume, Gruneisen coefficient increase, while the zero-point vibration pressure decrease.