基于Netty的HTTP客户端的设计与实现

能力开放平台是一个提供电信能力开放的移动互联网开放平台,向开发者提供丰富的业务能力,包括:短信、彩信、地图、定位等。能力开放平台接入系统需要异步处理客户端的HTTP请求,而平台内部各个系统间的消息传递也需要使用大量的异步HTTP请求。Netty是一款异步的事件驱动的网络应用开源框架,用于快速开发可维护的高性能、高扩展性协议服务器和客户端。本文简述了通过对开源框架Netty的源码封装,提供方便易用可以发送异步HTTP请求的客户端的设计思路和具体实现。     

Examining the role of the fixation cue in inhibition of return.

To clarify the role of the fixation cue in inhibition of return (IOR), the present study compared four conditions: fixation cue immediately after the peripheral cue, in the middle of the stimulus-onset asynchrony (SOA), immediately before the onset of the target, or no fixation cue. With a 200-ms SOA, less IOR was found when the fixation cue was either absent or occurred immediately after the peripheral cue. No differences between the four conditions were found with 400-ms and 800-ms SOAs. These findings suggest that there is a brief period of time in which attention cannot be withdrawn from the peripherally cued location. Once attention has been withdrawn from the peripherally cued location, IOR can be found at short SOAs. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

一种新颖的节能装置用功率驱动及电流信号检测电路

针对当前三相异步电动机调压节能装置驱动电路复杂、电流过零点检测困难等问题,设计了一种三相异步电动机调压节能装置的功率驱动及电流过零点检测电路,阐述了其工作原理,通过实验对设计的合理性进行了验证.实验结果表明,该驱动电路运行稳定,电流过零点检测电路能够准确捕捉电流过零点的时刻.     

Auditory stream segregation and the perception of across-frequency synchrony.

This study explored the extent to which sequential auditory grouping affects the perception of temporal synchrony. In Experiment 1, listeners discriminated between 2 pairs of asynchronous “target” tones at different frequencies, A and B, in which the B tone either led or lagged. Thresholds were markedly higher when the target tones were temporally surrounded by “captor tones” at the A frequency than when the captor tones were absent or at a remote frequency. Experiment 2 extended these findings to asynchrony detection, revealing that the perception of synchrony, one of the most potent cues for simultaneous auditory grouping, is not immune to competing effects of sequential grouping. Experiment 3 examined the influence of ear separation on the interactions between sequential and simultaneous grouping cues. The results showed that, although ear separation could facilitate perceptual segregation and impair asynchrony detection, it did not prevent the perceptual integration of simultaneous sounds. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

珊溪水电厂桥机并车不同步故障分析及处理

厂房桥机是水电站的重要设备,其可靠程度、稳定性能直接影响电站安装、检修和维护等工作.分析了桥机并车不同步故障的原因,从探伤、机械、电气部分等方面进行检测与处理,以消除故障,最终保证了正常使用.     

悬挂式输送链不同步现象改造及分析

分析了悬挂式输送链不同步的原因,提出了原有控制方式改造方案,通过几种方案的对比分析,最终确定采用可编程控制器PLC及变频器对双边链条运行出现的不同步进行自动调整的方式进行改造,并详细分析了该改造方案的可行性及实施方法。     

Modulating the interference effect in timing with varying stimulus onset asynchrony.

The interference effect on time judgments, when subjects are also required to perform a concurrent nontemporal task, is one of the most reliable findings in the time perception literature. In the present study, the interference between a time discrimination task (short or long tone) and a digit classification task (even or odd digit) was analysed using the overlapping tasks paradigm. Reaction times in the digit task were shorter at longer values of stimulus onset asynchrony (SOA) in Experiment 1, showing a clear modulation of interference with varying the relative position of the tasks. Using longer tone durations in Experiment 2, reaction times in the digit task were affected not only by the overlap between the tasks but also by the temporal proximity of responses in the timing and digit tasks. In Experiment 3, the effect of varying the SOA on performance on the digit task was abolished when the auditory tone was irrelevant, thus eliminating an interpretation in terms of distraction from the tone offset. We conclude that the interference effect in concurrent time discrimination and digit classification may be modulated by the degree of overlap between the tasks as well as by the overlap between late processing stages related to decision and response components in the 2 tasks. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Contrast effects in spontaneous evaluations: A psychophysical account.

In the affective-priming paradigm, target stimuli are preceded by evaluatively polarized prime stimuli and then are to be classified as either good or bad as fast as possible. The typical and robust finding is assimilation: Primes facilitate the processing of evaluatively consistent targets relative to evaluatively inconsistent targets. Nevertheless, contrast effects have repeatedly been observed. The authors propose a new psychophysical account of normal (assimilative) and reversed (contrastive) priming effects and test new predictions derived from it in 5 studies: In Studies 1 and 2, the authors' account is shown to provide a better explanation of contrastive effects in a priming paradigm with two primes than the traditional attentional account does. Furthermore, as predicted by the new account, contrast effects emerge at an intermediate stimulus-onset asynchrony (SOA, Study 3) and even with short SOAs when target onset takes participants by surprise (Study 4). Finally, the use of extremely valenced primes triggers corrective efforts (Study 5) as predicted. Implications for priming measures of evaluative associations are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

裂隙岩体非稳定渗流的复合单元算法

 针对裂隙岩体渗流非连续、非均质和各向异性的特点,提出裂隙岩体非稳定渗流的复合单元算法,给出详细的计算格式和数值处理的关键技术,包括复合单元的前处理、求解自由面边界流量项的积分方法以及溢出边界的判断准则。该算法的特点是：(1) 可准确地离散岩体内任意分布的裂隙;(2) 可考虑岩块的渗透性及其与裂隙间的水量交换;(3) 可与传统有限单元计算程序无缝整合;(4) 复合单元的拓扑信息由裂隙面和常规有限单元的交切计算生成,由于事先未考虑裂隙的存在,极大地减轻了人工剖分网格的工作量;(5) 对裂隙岩体非稳定渗流过程中裂隙与岩块渗流不同步的现象具有较强的描述能力,并能提供近似于有限单元法的计算精度。通过典型砂槽试验验证了该算法的正确性和有效性。最后,对裂隙岩体进行非稳定渗流分析,计算结果很好地反映了岩体内水压力的传递过程,实现了对裂隙与岩块因水力特性不同而导致的不同于整体流向的局部流动的模拟。     

Blinks of the mind: Memory effects of attentional processes.

If 2 words are presented successively within 500 ms, subjects often miss the 2nd word. This attentional blink reflects a limited capacity to attend to incoming information. Memory effects were studied for words that fell within an attentional blink. Unrelated words were presented in a modified rapid serial visual presentation task at varying stimulus-onset asynchronies, and attention was systematically manipulated. Subsequently, recognition, repetition priming, and semantic priming were measured separately in 3 experiments. Unidentified words showed no recognition and no repetition priming. However, blinked (i.e., unidentified) words did produce semantic priming in related words. When, for instance, ring was blinked, it was easier to subsequently identify wedding than apple. In contrast, when the blinked word itself was presented again, it was not easier to identify than an unrelated word. Possible interpretations of this paradoxical finding are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)