A dual-frequency acoustic levitator containing water was developed for studying bubble and drop dynamics in low gravity. It was flown on USML-1 where it was used in the Glovebox facility. High frequency (21 or 63 kHz) ultrasonic waves were modulated by low frequencies to excite shape oscillations on bubbles and oil drops ultrasonically trapped in the water. Bubble diameters were typically close...

Spherical crystallization of drugs is the process of obtaining larger particles by agglomeration during crystallization. The most common techniques used to obtain such particles are spherical agglomeration and quasi-emulsion solvent diffusion. Ammonia diffusion systems and crystallo-co-agglomeration are extensions of these techniques. By controlling process parameters during crystallization, su...

Accompanied by the deep development of big data technologies in urbanization, the smart city, which is supported by big data technologies, has revealed its potential gradually. As the core content of smart city, the smart information service becomes a frequent subject and direction of related researches. This paper will firstly investigate the information service demand of various groups of peo...

In this paper, we aim at exploring how individual location decisions affect the shape of a growing city and, more precisely, how they may add up to a configuration that diverges from equilibrium configurations formulated ex-ante. To do so, we provide a two-sector city model merging a static equilibrium analysis with agent-based simulations. Results show that under strong agglomeration effects, ...

Recent work suggests that Cournot oligopolists competing in a spatial model, with a uniform distribution of consumers, agglomerate in the center of the market. In this paper we analyze the robustness of this result with a general symmetric distribution of consumers and show that if the population density is "too thin" at the center of the market, then Cournot competition does not yield spatial ...

This paper considers the role of soft skills in cities and industry clusters. It begins by specifying a model of agglomeration economies where soft skills allow agents to interact more productively. The model exposes two conflicting forces: agglomeration allows opportunities to interact, but it also produces thick, specialized markets, and this specialization can be a substitute for interaction...

The integrated development of central Henan urban agglomeration is a significant strategy of economic and social development for Henan Provence. This paper summarized the thoughts and exerting point of integrated development of central Henan urban agglomeration, and analyzed the existing issues during the integrated development of central Henan urban agglomeration. For example, the integrated d...