基于“过滤”理论的夹心阶层住房问题思考

文章着眼于"过滤"理论对夹心阶层住房问题解决途径的理论启示,在认识夹心阶层住房问题本质的基础上,提出了夹心阶层住房问题的解决思路。基于"过滤"理论解决夹心阶层住房问题思路的核心在于,寻求住房过滤效应的实现机制和保障机制,以期夹心阶层在住房需求、住房供应、住房消费和补贴政策等角度的及时引导与适当调整。

“三市场过滤模型”与廉租房制度的完善

通过"三市场过滤模型"的分析,并参考美国廉租房发展的融资渠道,得出完善我国现行廉租房制度的若干启示:政府应继续扩大廉租房受益群体范围,采用多种融资渠道,确定科学合理的廉租房提供方式及明确规范退出、监管、处罚机制。

Aerosol Filtration Application Using Fibrous Media—An Industrial Perspective

Filtration of aerosol particles using non-woven fibrous media is a common practice for air cleaning. It has found wide applications in industries and our daily lives. This paper overviews some of these applications and provides an industrial perspective. It starts from discussing aerosol filtration theory, followed by a brief review on the advancement of filtration media. After that, filtration applications in respiratory protection, dust collection, and engine in-take air cleaning are elaborated. These are the areas that the author sees as the typical needed ones in China's fast pace economical development endeavor, where air filtration enables the protection of human health, environment and equipment for sustainability.

Performance evaluation on field synergy and composite regeneration by coupling cerium-based additive and microwave for a diesel particulate filter

In order to reveal the mechanics of composite regeneration by coupling cerium-based additive and microwave for a diesel particulate filter, a composite regeneration model by coupling cerium-based additive and microwave for a diesel particulate filter was established based on field synergy theory. Performance evaluation on field synergy and composite regeneration of the diesel particulate filter was conducted by using the vortex crushing combustion and field synergy mathematical models. The results show that the peak temperature of the particulate filter body reaches 1180-1190 K when the regeneration time is 175 s, and there are optimal coordination degree between the velocity vector and temperature gradient of the filter body and the maximum ratio0.56-0.60 of the best burning regeneration region is obtained. Accordingly, the largest regeneration combustion rate inside the particulate filter body and the highest regeneration efficiency at the moment are achieved.

Attention Strategy Training Affecting Second Language Vocabulary Acquisition of College Students

This paper analyzes attention theory in the cognitive psychology and introduces second language vocabulary acquisition. The filter theory and attention resource theory in the attention theory points out that attention has a key effect on the learner＇s cognitive vocabulary learning by raising students＇ expectations for new words, by increasing the frequency of exposure to them, by enhancing their perceptual salience, and by increasing the task demand for word study. The fact proves that enhancing attention in input could promote students＇ vocabulary acquisition and help them form efficient vocabulary learning strategy suitable for their levels of proficiency.

A new improvement of TCP based on adaptive filtering

On the basis of studying the standard TCP retransmission mechanism, this paper proposes a method to adopt the theory of adaptive filtering in the field for the estimation of round trip time （RTT）. Then this method is embedded in TCP for estimation of RTT, and defined as RTT-AF TCP. In the schemes with Only-TCP flow and with TCP and UDP flow fighting for the link, the experiment results were made and analyzed by using the standard TCP and the RTT-AF TCP. The experimental results show higher throughput and lower loss rate of packets by using RTT-AF TCP for data transmission, and achieve excellent effect.

Existence of Linear Strategy Equilibrium in Insider Trading with Partial Observations

This paper investigates a linear strategy equilibrium in insider trading in continuous time allowing market makers to know some information on the value of a stock. By the use of filtering theory,the authors prove that in a monopoly market, there exists a unique equilibrium of linear strategy of intensity in a closed form, such that the insider can make positive profits and at which, all of the private information on the value of the stock is released; and the more accurate the information on the value of the stock observed by the market makers, the less the positive profits are made by the insider, and even go to zero. However, there is no Nash equilibrium in a Cournot competition market between two insiders if they both adopt a linear strategy of intensity.

Estimation of anthracnose dynamics by nonlinear filtering

In this work, we apply the nonlinear filtering theory to the estimation of the partially observed dynamics of anthracnose which is a phytopathology. The signal here is the inhi- bition rate and the observations are the fruit volume and the rotted volume. We propose stochastic models based on deterministic models studied previously in the literature, in order to represent the noise introduced by uncontrolled variations on parameters and errors on the measurements. Under the assumption of Brownian noises, we prove the well-posedness of the models in either they take into account the space variable or not. The filtering problem is solved for the nonspatial model giving Zakai and Kushner- Stratonovich equations satisfied respectively by the unnormalized and the normalized conditional distribution of the signal with respect to the observations. A prevision prob- lem and a discrete filtering problem are also studied for the realistic cases of discrete and possibly incomplete observations. We illustrate the filter behavior through figures displaying the average estimation relative error and a 95% confidence region obtained after a hundred of numerical simulations with initial conditions taken randomly with respect to uniform law.