Visual pattern recognition network: Its training algorithm and its optoelectronic architecture

A visual pattern recognition network and its training algorithm are proposed. The network constructed of a one-layer morphology network and a two-layer modified Hamming net. This visual network can implement invariant pattern recognition with respect to image translation and size projection. After supervised learning takes place, the visual network extracts image features and classifies patterns much the same as living beings do. Moreover we set up its optoelectronic architecture for real-time pattern recognition. (C) 1996 Optical Society of America

Pentylenetetrazole-induced status epilepticus following training does not impair expression of morphine-induced conditioned place preference

Learning and memory play an important role in morphine addiction. Status epilepticus (SE) can impair the spatial and emotional learning and memory. However, little is known about the effects of SE on morphine-induced conditioned place preference (CPP). Th

Impact of Brunswick river mouth training walls on adjacent beaches, Brunswick heads, New South Wales, Australia

River training walls have been built at scores of locations along the NSW coast and their impacts on shoreline change are still not fully understood. In this study, the Brunswick River entrance and adjacent beaches are selected for examination of the impact of the construction of major training walls. Thirteen sets of aerial photographs taken between 1947 and 1994 are used in a CIS approach to accurately determine tire shoreline Position, beach contours and sand volumes, and their changes in both time and space, and then to assess the contribution of both tire structures and natural hydrodynamic conditions to large scale (years-decades and kilometres) beach changes. The impact of the training walls can be divided into four stages: natural conditions prior to their construction (pre 1959), major downdrift erosion and updrift accretion during and. following the construction of the walls in 1959 similar to 1962 and 1966. diminishing impact of the walls between 1966 and 1987, and finally no apparent impact between 1987 similar to 1994. The impact extends horizontally about 8 km updrift and 17 km downdrift, and temporally up to 25 years..

国有企业管理者裁员决策特征及其对留岗者心理影响的研究

In China, orgnizational change and downsizing are the primary topics studied in I/O psychology and Human Resource Management. Due to the great need in reality, both theorists and practitioners raised the same questions: Does downsizing increase the organizational performance? What is the relationship between organizational downsizing strategies and survivors' psychological reations? Which factors influence managers' downsizing decision-making most? How can managers manage the process successfully? The purpose of this study is trying to answer these questions, and then to establish the downsizing decision-making model of China's SOE (State owned enterprise) managers. The hypothetical model of SOE managers' downsizing decision-making was put forward, based on a tremendous amount of literature on downsizing decision-making, especially on the downsizing decision-making model built by B. Shaw, and also based on the results of the interviews conducted to the SOE managers who have the downsizing decision-making experiences. In order to test and verify the model, 322 SOE managers were investigated by a questionnaire study. And the statistic results supported the hypothetical downsizing decision-making model. Further, 259 survivors (those who are still working in the SOEs) from 7 downsized SOEs and 1 non-downsizing SOE, were also investigated by a questionnaire study. The statistic results also supported the hypothetical downsizing decision-making model. A subsequent case study was performed upon one downsized SOE; and a deliberate focus group interview study within 6 SOE mangers from another downsized SOE was also conducted. Both fundings from the two studies surported the hypothetical model again. Thus, China's SOE managers' downsizing decision-making model was established. This China's SOE managers' downsizing decision-making model suggests the following: Firstly, the characteristics of managers'downsizing decision-making were the center of the model. Those characteristics displayed during the process of the downsizing decision planning, the participation of downsizing decision-making and the communication concerning downsizing events, were influenced by managers' sense of crisis, controlling factors out of the organization and the managing experience within it. Especially, the latter two factors were more important. Secondly, in downsizing decision-making problems, the perceived crisis of China's SOE managers was mainly influenced by the outer factors, esp. the controlling factors from the government or the high authorities, but not by the inner factors including manufacturing management, HRM skills and organizational competition strategies. Thirdly, survivors'psychological reactions (including job satisfaction, job motivation, team working cooperation, etc) were mainly influenced by the characteristics of the managers' downsizing decision-making, at the same time, also by the outer factors (including controlling and social security factors) and the inner factors (including competition strategy and HRM skills). Finally, according to the model and the results from this study, the conclusions were reached in the followings: The stronger the controlling effort upon the SOE managers, the worse the effect displayed during the downsizing process. And in order to improve the effect and quality of downsizing decision-making, SOE managers need a lot of training to ameliorate their competencies such as competition strategies and HRM skills.

影响吗啡动物行为效应的因素及其机制

Credible and stable animal behavioral models are necessary to research the mechanisms of addiction in vivo, especially to study the relationship between memory or stress and drug addiction, which has been one of the focuses in this field. So the object of this study was to observe the influences of several factors on the behavioral effects of morphine shown in the paradigms of conditioned place preference (CPP) and locomotor activity (LA), and to explore the effects of adrenalectomy on LA induced by morphine in rats. In addition, the cortexes of rats were examined, which were exposed to chronic administration of several doses of morphine with or without foot shock. Moreover, a new behavioral model was built to quantify the motivation of drug seeking. The results showed that CPP was more sensitive to low dose of morphine than to high dose. The period of experiment could be shortened by increasing the training times everyday, whereas in this way the dose of morphine should be low enough to avoid the impact between the near two exposures to morphine. Effects of chronic administration of morphine on LA in rats were dose- and time- dependent, which supplied evidence to choose parameters in other behavioral models. The results obtained by the simplified LA paradigm showed that hyperactivity of low dose of morphine following hypoactivity, and naloxone had no effects on LA but blocked the locomotion effects of morphine. Obvious effects of morphine on LA of rats might depend on a reasonable level of plasma corticosterone, which may determine individual vulnerability to drug addiction. Stress may also potentiate the vulnerability by aggravating damage to cortex of rats induced by drug dose-dependently, which is suggested by the results of histological examination. The result that frontal and temporal cortexes and hippocampus were injured suggests that there may be a close relationship between memory and drug addiction. It was showed that the new behavioral model on the basis of Morris water maze might be used to quantify the motivation of drug-craving.