500 kV变电站站用仿真机的开发与应用

介绍一种新型、投资少、见效快、应用面广、全CRT的500kV变电站站用仿真机的软、硬件构成及其功能。该仿真机运行稳定,仿真范围全面,各种动静态效果逼真,可以满足变电站日常教学、培训、反事故演习、事故预想、分析及处理训练的要求。     

Geometric complexity identifies platelet activation in familial hypercholesterolemic patients

Familial hypercholesterolemia (FH), a genetic disease, is associated with a severe incidence of athero‐thrombotic events, related, also, to platelet hyperreactivity. A plethora of methods have been proposed to identify those activated circulating platelets, none of these has proved really effective. We need efficient methods to identify the circulating platelet status in order to follow the patients after therapeutic procedures. We propose the use of computerized fractal analysis for an objective characterization of the complexity of circulating platelet shapes observed by means of transmission electron microscopy in order to characterize the in vivo hyperactivated platelets of familial hypercholesterolemic patients, distinguishing them from the in vivo resting platelets of healthy individuals. Platelet boundaries were extracted by means of automatically image analysis. Geometric complexity (fractal dimension, D) by box counting was automatically calculated. The platelet boundary observed by electron microscopy is fractal, the shape of the circulating platelets is more complex in FH (n = 6) than healthy subjects (n = 5, P < 0.01), with 100% correct classification in selected individuals. In vitro activated platelets from healthy subjects show an analogous increase of D. The observed high D in the platelet boundary in FH originates from the in vivo platelet activation. Computerized fractal analysis of platelet shape observed by transmission electron microscopy can provide accurate, quantitative data to study platelet activation in familial hypercholesterolemia and after administration of drugs or other therapeutic procedures. Microsc. Res. Tech. 78:519–522, 2015. © 2015 Wiley Periodicals, Inc.     

Self-verbalization versus tutor verbalization in modifying impulsivity.

Used verbal self-instruction in training 122 impulsive (as determined by their performance on the Matching Familiar Figures Test--MFFT), 1st graders to perform visual discrimination matching tasks. The effects of self-verbalization (as opposed to tutor verbalization) and strategy training were compared through the employment of 4 training conditions: verbal self-instruction and strategy training, strategy training, verbal self-instruction, and material control. Immediate posttests, following each of the 4 individual training sessions, showed that while strategy training increased latency, self-verbalization both increased latency and reduced errors. The MFF posttest revealed no significant differences. It is suggested that the training period was too short to effect transfer. (30 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

陕西葫芦沟金矿床地质与稀土元素特征分析

摘 要：葫芦沟金矿床矿体主要呈脉状和透镜状产出;矿石矿物主要为黄铁矿,其次为方铅矿、黄铜矿和闪锌矿,脉石矿物主要为钾长石和石英;矿石结构为他形-半自形、自形晶粒和压碎结构,矿石构造以团块状和碎裂状为主;矿区近矿围岩蚀变类型有硅化、钾化、黄铁矿化和绢英岩化。通过对矿区稀土元素特征进行分析,认为葫芦沟金矿床物质来源于太古宇太华群,属于赋存于古老变质岩中的中低温石英脉-破碎蚀变岩型金矿床。     

南北地区不同金矿床稀土元素特征差异分析

为了解中国南北地区不同金矿床成矿特点方面的差异,利用稀土元素的示踪性,对南北地区不同金矿床的稀土元素特征进行了统计分析。结果显示,不同地区金矿矿石中稀土元素的总量差异较显著,最高为江西金山金矿,稀土总量为16639×10-6,最低为黑龙江乌拉嘎金矿,稀土总量为347×10-6,由此推断不同地区金矿床的成矿物质来源的深度不同;大部分金矿床显示轻稀土元素较明显富集,轻重稀土分异程度较高,稀土配分曲线向右倾斜,但河南杨砦峪金矿与黑龙江乌拉嘎金矿的稀土配分曲线形态较为平缓,轻重稀土分异程度较低;黑龙江乌拉嘎金矿、辽宁白云金矿具有铕正异常,其余金矿床为铕负异常,这可能是因为不同金矿床成矿环境是不一样的。     

Experimental determination of thermal performance of glazed façades with water film,under direct solar radiation in the tropics

An experimental investigation of a glazed façade oriented west has been conducted utilizing the Sustainable Glazed Water Film (SGWF). The experiments involved the following three parameters namely: the water flow rate, the type of glazing, and the solar radiation intensity. Two full-scale rooms were used, one as a reference room, with a fixed configuration, and the other as a test room, which could be configured in different ways. The ability of the SGWF to reduce the passage of the solar energy during the sunny hours and hence to limit the heat passage through glazing was analyzed. The aim of this paper is to examine the improvement in thermal performance obtained by the flowing water film over glazed façades. It has been found that the flowing water film on the glazed façade lowers the glazing surface temperature by 7.2–14 °C (average) and absorbs a portion of the solar energy resulting in decreasing indoor temperature by 2.2–4.1 °C (average). However, with increased solar radiation intensity, the SGWF provides a better level of efficiency in reducing the heat transfer indoors.     

Interactions between the prefrontal cortex and amygdala during delay discounting and reversal.

Interactions between the prefrontal cortex and amygdala are thought to be critical for reward anticipation. Alterations in reward anticipation that lead to an inability to wait for rewards or a diminished capacity to change behavior when doing so would be optimal are often termed impulsivity and compulsivity, respectively. Distinct regions of the prefrontal cortex may support decreased impulsivity through self-control and decreased compulsivity through flexibility. However, both self-control and flexibility appear to involve the amygdala. Using a delay discounting paradigm, the current investigation found that inactivation and disconnection of the medial prefrontal cortex and basolateral amygdala led rats to become more impulsive by affecting preference for smaller immediate over larger delayed rewards. Conversely, inactivation and disconnection of the orbitofrontal cortex and amygdala led rats to become more compulsive as demonstrated by an inability to flexibly reverse stimulus–reward relationships in an odor reversal task. The current findings support a double dissociation between orbitofrontal cortex–amygdala interactions for odor reversal and medial prefrontal cortex–amygdala interactions for delay discounting. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Encounter with suffering.

The author outlines lessons learned during many missions undertaken in countries of the former Soviet Union and former Yugoslavia with the aim of setting up psychosocial assistance programs for children adversely affected by the socioeconomic transition process and armed conflicts in those countries. (PsycINFO Database Record (c) 2010 APA, all rights reserved)