Study on the influencing factors and strategies of sorted collection of urban refuse in China

Although the sorted collection of urban refuse in China started later than that in developed countries, it has been sustained 14 years since the implementation of pilot project of waste sorting. However, the waste sorting among cities is still making slow progress and beset with difficulties in China. With a review of the actual situation of waste sorting in China, this article firstly introduced the urban refuse sorted way in China, and then analysed the influencing factors of the sorted collection of urban refuse. At last, we put forward some strategies and suggestions for dealing with the prominent challenges of the sorted collection of urban refuse in China

STUDY OF CONTINUOUS ICEBREAKING PROCESS WITH COHESIVE ELEMENT METHOD

Accurate simulation of the continuous icebreaking process in level ice is crucial for the design of icebreakers. The crushing and bending failures of ice sheet, as well as the rotating, sliding and accumulating of ice cusps broken from the ice sheet constitute a complex system for the icebreaking process. In this paper, cohesive element method is combined with an elastoplastic softening constitutive model to simulate continuous icebreaking process in level ice. Firstly, the elastoplastic softening constitutive model in modelling ice local crushing is calibrated by simulating the ice cone crushing tests. Three different softening laws are proposed and their effects on simulation results are evaluated by comparing with the experimental data. Then, the continuous icebreaking process in level ice is simulated by cohesive element method. The regular tri-prism mesh is applied to ice bulk elements to realize the random propagation of crack. The mesh dependency study is carried out, and the simulation results are validated by comparing with model test results in both of time domain and frequency domain. The ice failure patterns during continuous icebreaking process are also compared between the simulated and experimental results. Finally, the influences of ship velocity on ice resistance and ice failure patterns are investigated by numerical methods and semi-empirical formulas

Recent advances in basic neurosciences and brain disease: from synapses to behavior

Abstract Understanding basic neuronal mechanisms hold the hope for future treatment of brain disease. The 1st international conference on synapse, memory, drug addiction and pain was held in beautiful downtown Toronto, Canada on August 21–23, 2006. Unlike other traditional conferences, this new meeting focused on three major aims: (1) to promote new and cutting edge research in neuroscience; (2) to encourage international information exchange and scientific collaborations; and (3) to provide a platform for active scientists to discuss new findings. Up to 64 investigators presented their recent discoveries, from basic synaptic mechanisms to genes related to human brain disease. This meeting was in part sponsored by Molecular Pain, together with University of Toronto (Faculty of Medicine, Department of Physiology as well as Center for the Study of Pain). Our goal for this meeting is to promote future active scientific collaborations and improve human health through fundamental basic neuroscience researches. The second international meeting on Neurons and Brain Disease will be held in Toronto (August 29–31, 2007).</p

Recent advances in basic neurosciences and brain disease: from synapses to behavior

Understanding basic neuronal mechanisms hold the hope for future treatment of brain disease. The 1st international conference on synapse, memory, drug addiction and pain was held in beautiful downtown Toronto, Canada on August 21–23, 2006. Unlike other traditional conferences, this new meeting focused on three major aims: (1) to promote new and cutting edge research in neuroscience; (2) to encourage international information exchange and scientific collaborations; and (3) to provide a platform for active scientists to discuss new findings. Up to 64 investigators presented their recent discoveries, from basic synaptic mechanisms to genes related to human brain disease. This meeting was in part sponsored by Molecular Pain, together with University of Toronto (Faculty of Medicine, Department of Physiology as well as Center for the Study of Pain). Our goal for this meeting is to promote future active scientific collaborations and improve human health through fundamental basic neuroscience researches. The second international meeting on Neurons and Brain Disease will be held in Toronto (August 29–31, 2007).Psychiatry, Department ofNon UBCMedicine, Faculty ofReviewedFacult