限饲日龄对肉鸡福利指标和免疫器官发育的影响

本研究采用数量限饲,探讨不同限饲起始日龄对肉鸡整个生产周期中的福利状况和免疫器官发育的影响.[方法]选1日龄AA肉用仔鸡360只,随机分为3个处理,每个处理设3个重复,每个重复40只.Ⅰ组为对照组,Ⅱ、Ⅲ组的限饲开始日龄分别为8日龄和12日龄,限饲组限饲时间为7d,限饲强度均为对照组前一天采食量的80％,限饲组在非限饲期与对照组肉仔鸡均为自有采食和饮水.[结果]早期限饲可显著降低35日龄、42日龄肉鸡胫骨长、尺骨长不对称性综合FA（P ＜0.05）;42日龄时肉鸡足底和腿关节的重度、中度和轻度灼伤各组之间差异不显著（P＞0.05）,但无灼伤率两试验组与对照组差异显著（P＜ 0.05）;42日龄时肉鸡的腿肌率、胸肌率两试验组与对照组差异季显著（P＜0.01）.早期限饲显著提高了肉鸡28日龄的法氏囊指数（P＜0.05）,8-14日龄限饲对28日龄时的脾脏指数影响显著（P＜0.05）;各处理组在14日龄、21日龄、28日龄、35日龄和42日龄时NDV抗体滴度差异不显著（P＞0.05）,但在28日龄后的血液中ND的抗体滴度增幅,试验Ⅱ、Ⅲ组高于对照组.[结论]8-14日龄限饲可有效改善肉鸡的福利状况,促进了免疫器官的发育,提升了饲养后期肉鸡血清中的ND抗体滴度.     

Assessing the importance of subvocalization during normal silent reading

A concurrent speaking paradigm was used to assess the importance of subvocalization during the reading of lengthy natural prose passages. Experiment 1 showed that having subjects count aloud while reading interfered with their comprehension and recall of the text's details as well as its gist, but did not affect the durability of the memory trace. Experiment 2 replicated these findings and established the validity of using concurrent speaking as a technique to interfere with speech-specific processes during silent reading. By pitting concurrent speaking against a nonverbal concurrent task, Experiment 2 provided evidence that its detrimental effect on comprehension was due to a competition for speech-related resources rather than a general competition for cognitive resources. Interfering with speech recoding during silent reading led to an average decrement of 10–12% in comprehension performance. However, Experiment 2 also showed that there were substantial individual differences in the magnitude of the speech interference effect and that these differences were systematically related to subjective reports about the concurrent speaking manipulation.     

一类基于人工免疫系统与极值优化的混合算法求解流水作业调度问题

The permutation flowshop scheduling problem (PFSP) is one of the most well-known and well-studied production scheduling problems with strong industrial background. This paper presents a new hybrid optimization algorithm which combines the strong global search ability of artificial immune system (AIS) with a strong local search ability of extremal optimization (EO) algorithm. The proposed algorithm is applied to a set of benchmark problems with a makespan criterion. Performance of the algorithm is evaluated. Comparison results indicate that this new method is an effective and competitive approach to the PFSP.     

基于免疫原理的入侵检测系统探索

随着计算机应用的日益普及和信息网络技术的飞速发展,网络安全问题越来越显示出其重要性。作为防火墙的有益补充,入侵检测技术引起了广泛的关注,但是目前的入侵检测系统大多是基于误用检测技术,只能检测出已知的入侵,存在着一定的漏检率。生物免疫系统和计算机网络入侵检测系统具有很大的相似性,它为人们研究入侵检测技术提供了全新的思路。     

改进免疫算法在旅行商问题中的应用

免疫算法是基于人工免疫的基本理论发展而来,它是对人工免疫理论研究和应用的扩充与发展。本文提出了一种改进的提取疫苗和注射疫苗的免疫算法,给出了该算法疫苗的形成方式,并将该算法应用在典型的组合优化问题TSP的求解中。通过50个城市TSP问题的仿真实验,表明该算法较原算法有更快的收敛速度,是一种较理想的解决TSP问题的智能优化算法。     

水貂肠炎病毒疫苗效检指标及实验动物模型研究

测定了水貂肠炎病毒无血清细胞培养灭活矿油疫苗和铝胶疫苗免疫接种水貂，豚鼠和家兔的血清ＨＩ和ＳＮ抗体消长规律，证明豚鼠，家兔或水貂接种疫苗后１１－４０ｄ的血清ＨＩ抗体水平是检定ＭＥＶ矿油疫苗或铝胶疫苗对水貂的体液免疫力和免疫保护率的经济，简便和可靠的指标，建立了ＭＥＶ疫苗免疫效力的检定指标及其实验动物模型。     

基于听觉掩蔽效应的语音增强算法研究

为提高增强语音的听觉效果,研究了一种结合维纳模型和人耳听觉掩蔽效应的语音增强方法。该方法能有效地抑制背景噪声。     

NEC—PN3PY系列寻呼机的指标测试

本文从实用的角度，以具有代表性的NEC数字式寻呼机PN3PY系列机为例，说明了在生产或维修时如何对数字寻呼机进行简便有效的指标测试．     

DS/CDMA系统中盲干扰抑制的抖动符号误差恒模算法

This paper presents an improved error function of dithered signed-error constant modulus algorithm （IDSE-CMA） for blind multiuser interference suppression in DS/CDMA systems. It uses a different error function to replace the former one in sign operation of the DSE-CMA and compares their performance in multiple access interference （MAI） suppression ability. Simulations indicate that the new algorithm has better performance than the similar CMA in terms of convergence speed and steady-state performance：     

免疫遗传算法在函数优化中的应用

生物免疫系统是一种高度并行的自适应信息学习系统,人工免疫系统是由生物免疫系统启发而来,借鉴了一些免疫系统的功能、原理和模型,主要用于信息处理和问题求解。在对免疫系统的一些基本概念和原理进行介绍的基础上,简要分析了人工免疫算法的研究现状及其改进的算法在函数优化上的应用,并提出了混沌免疫算法的思想。