引入粒子生存值的SPSO-BP气体传感器补偿算法

针对复杂环境下气体传感器的稳定性不足的问题,提出了一种基于改进反向传播(BP)神经网络的传感器补偿算法。首先建立基于温湿度补偿的BP神经网络结构,并确定各层网络的节点数。然后提出用粒子群算法(PSO)优化BP神经网络的初始权值和阈值。最后引入粒子生存值并结合模拟退火改进传统PSO算法(SPSO),提高模型的全局极值寻优能力。实验结果表明:本文改进的SPSO算法较传统的PSO算法寻优能力更强,将SPSO与BP神经网络相结合,提高了气体传感器的温湿度补偿精度。

域名解析系统生存时间值的研究

中国电子检验检疫主干系统上线运行后,部分客户端在网络畅通的情况下时而出现"目前网络拥堵或服务器断开,请稍后"的提示。本文分析了中国电子检验检疫主干系统域名解析系统的工作流程,基于实验和网络监控数据找出了域名解析系统的生存时间值设置过小是导致上述问题的主要原因。通过增大生存时间值,既解决了上述问题,又保持了线路和应用负载均衡的工作机制。

Effects of salinity fluctuation and dietary protein/ carbohydrate ratio on the survival and growth of Juvenile Litopenaeus vannamei

A factorial study was conducted to determine the effects of salinity （constant （SO） and fluctuating （S10）） and isoenergetic diet of different protein/carbohydrate ratios （P/C： 4.1, 1.9, 1.0 and 0.6） on the survival and growth of juvenile Litopenaeus vannamei. The experiment lasted for 35 days. The results showed that I） At S0 and S10, specific growth rate and apparent digestibility coefficient exhibited decreasing trend, while food conversion ratio exhibited increasing trend, with decreasing P/C ratio. At SO, food consumption and specific growth rate of the shrimp fed 4.1 P/C were significantly higher than those fed 1.0 and 0.6 P/C, whereas at S10, no significant differences were detected among different treatments; II） At 4.1 and 1.9 P/C, food consumption and specific growth rate were higher in the shrimp maintained at SO as compared with those at S10, while at 1.0 and 0.6 P/C, an inverse trend was observed. Among four P/C ratios, food conversion ratio of the shrimp at SO was the lowest.

基于局域网私设NAT场景发现与管控系统的研究

近年来,运检数字化大规模推广,网络资源需求不断增长,网络安全防护要求也不断提高。为适应不断扩展的数字化业务,改善变电站数字化网络质量,解决现有Ⅳ区IP地址资源匮乏的阶段性客观难题,各种技术手段层出不穷,其中NAT技术最为常见,使用范围最广。为提升网络安全水平,确保变电站网络资源的安全高效利用,本文对变电站(供电所)私设NAT场景进行研究,设计了变电站(供电所)局域网私设NAT场景发现与管控系统,将变电站及供电所相关IP地址规划导入系统。该系统采用数据流截取方式分析网络中所有的NAT场景,最终实现网络管理员对网络私设NAT场景的分类管理。应用技术手段有效掌握网络中的私有NAT数量及私有IP地址使用情况,强化网络空间安全,在发生网络安全事件时,能准确地进行溯源工作。

The diagnosis and treatment for hilar cholangiocarcinoma:a report of 136 cases

Objective： The aim of the study was to compare the effects of several kinds of diagnosis and treatment measures on hilar cholangiocarcinoma. Methods： The 136 patients with hilar cholangiocarcinoma were operated in our hospital （Department of Hepatobiliary Surgery, Affiliated Hospital of Luzhou Medical College, China） from 1990 to 2011. Among of them, 48 cases with tumour resection, 9 cases with intrahepatic biliary-enteric bypass, 61 with external biliary drainage, 18 with explora- tion. Results： The total in-hospital mortality was 0%. The 97 cases were follow-up after operation： in 44 patients with turnout resection （15 with positive margins, 29 with negative margins）, 1, 2, 3 years survival rates were respectively 58.26%, 28.34% and 6.38%; 43 patients with biliary drainage （7 patients with intrahepatic biliary-enteric bypass, 28 cases with external and jejunostomy, 8 patients with simple external biliary drainage）, 1, 2 years survival rates were respectively 30.39% and 0%. Ten patients with exploration died within 21-68 days. Conclusien： To combine cholangiopancreatography, ultrasonography and Burke T-staging have practical value for assessment for tumour resectability. To resect a piece of wedge hepatic tissue but not total segment I might gain the effect of increasing curative resection and reserving segment I hepatic tissue.

Global Bioethical Prevention of the Collision of Biological and Cultural Evolution on Miserable Human Survival

With the cultural myth that science can only determine the way the world ＂is＂ （facts）, while humanities, social sciences, lawyers, philosophers, and theologians must determine the way the world ＂ought to be＂ （values）, those in position of global-, national-, and local-political power make major decisions of the use （or non-use） of scientific knowledge and technology. As a result, the human being has created a non-scientifically based cultural environment that is affecting his ability to survive. In effect, cultural evolution is occurring more rapidly than biological evolution that can adapt to the changes brought about in the physical and psycho-social environments. In a pluralistic cultural world, where each society has generated a different view of human nature and different ethical values, the use, misuse, or non-use of scientific and technological advances are derived from these unscientific views of human nature. Since all life depends on limiting interacting environmental and ecological factors, it is imperative that scientific information be used to govern how to minimize irreversible effects on life-sustaining ecological factors, but also scientific information bearing on understanding human nature ought to be integrated into a ＂global bioethics＂. While ethical values cannot be directly derived from scientific factors, it is also true that human values or our ＂ought＂ cannot be maintained in ignorance or defiance of the facts or the ＂is＂.

Models of Presence and Loss of Transcendence in History

The article seeks to elucidate the status of transcendence in the historiography of secularization through the perspective of collective memory. It discusses two typological models dealing with the basic metaphysical problem concerned with the presence and meaning of transcendence in real human existence. According to the first, the historical reality of secularization causes a break from the collective memory whose roots are in religion. In contrast, the second model considers that despite the deep transformations in the status of religion in a reality of secularization, an experience of historical continuity may also occur there. These models denote the two poles in the argument about the meaning and value of history for modem people. The article suggests a phenomenological analysis of the two models and criticizes their deficiencies. Finally, the ＂tension model＂ is outlined as a third alternative that aims at overcoming the binary situation created by the first two in favor of a perspective that necessitates and contains both immanence and transcendence.

The study of corporate culture＇s influence on enterprise management innovation

It is well known to us that people are the core force of the survival and development of enterprise, and on the other hand, enterprise is both an organization of individuals and an interest organization which is based on clear development goals and the distributing and integrating existing. Culture is the temperament and style reflecting of the spirit and the consciousness of human beings and even the individuals. Enterprise is an organization which unites the established development goals and the individuals. Naturally, this humanistic enterprise groups should have a certain ＂temperament＂ and ＂style.＂ Compared with the persons, this temperament and style, is the result of the collision, agitation, adjustments, tuning and optimized, representing the collective personality. Instead leaded by the individual consciousness, it is collective, organizational personality and style expressed by individual deeds and awareness and. In other words, corporate culture is a long-term production and business activities in the form of consciousness, and the comprehensive reflection of the business purpose, values and ethical conduct abided by the majority of employees.

Augmenting the conservation value of rehabilitated wildlife by integrating genetics and population modeling in the post-rehabilitation decision process

Insular populations are particularly vulnerable to the effects of stochastic events, epidemics, and loss of genetic diversity due to inbreeding and genetic drift. The development of successful man- agement options will require accurate baseline data, establishment of clear objectives, and finally monitoring and implementation of corrective measures, if and when required. This study assessed management options for the genetic rehabilitation of highly inbred woylies obtained from wildlife rehabilitation centers. The study generated genetic data for the woylie Bettongia penicillata from a conservation reserve and calculated measures of genetic diversity and individual relatedness. These data were fed into a population viability analysis （PVA） to test genetic outcomes in relation to different management actions. We demonstrated that a careful selection of the founder cohort produced a population with an expected heterozygosity of -70% for a window of approximately 10 years. A proposal to increase the size of the reserve available to the colony was shown to almost double the time at which the colony would retain heterozygosity levels of≥70%. Additionally, developing a regular program of supplementation of unrelated woylies would result in a further improvement in their genetic value. This study demonstrated how the application of molecular techniques in combination with PVA can be beneficial for the management of rehabilitated wildlife otherwise considered of little conservation value. This approach can be applied to the management of breeding programs, but also to small, closed populations such as those found on islands, fenced enclosures, insurance populations, and in zoological collections.

Co-existence thresholds in the dynamics of the plant-herbivore interaction with Allee effect and harvest

In the interaction between plants and herbivores that live in the same ecosystem, understanding the conditions in which co-existence equilibrium occurs answers a major question in Ecology. In this interaction, plants serve as food for herbivores on the food chain. Then the livelihood of herbivores highly depends on the availability of food, in this case the availability of plants. Moreover, the abundance of the plant density alone does not guarantee the non-extinction of the herbivore population as they are assumed to reproduce sexually. With this motivation, in this paper a predator-prey mathematical model is reformulated such that the death rate of the herbivore population is dependent on the plant density and their emergence is also governed by the Allee effect. Using the mathematical theory of dynamical system, threshold conditions are obtained for the non-extinction of the herbivore population and a trapping region is obtained to ensure co-existence of the population. Moreover, it has been shown that the dynamics of the population is significantly sensitive to the feeding rate and the harvest rate of the herbivore population.

Survival analysis of a stochastic single-species population model with jumps in a polluted environment

This paper is concerned with a stochastic single-species system with Levy jumps in a polluted environment. Some sufficient conditions on extinction, non-persistence in the mean, weak persistence in the mean, strong persistence in the mean, stability in the mean and stochastic permanence are obtained. The threshold between extinction and weak persistence in the mean is established. At the same time, under a simple condition, it is proved that this threshold also is the threshold between extinction and stability in the mean. The results reveal that L@vy jumps have significant effects to the persistence and extinction results.

Solvability of Multi-Point Boundary Value Problem

This paper deals with the existence of solutions for the problem{（Фp（u′））′=f（t,u,u′）,t∈（0,1）, u′（0）=0,u（1）=∑i=1^n-2aiu（ηi）,where Фp（s）=｜s｜^p-2s,p〉1.0〈η1〈η2〈…〈ηn-2〈1,ai（i=1,2,…,n-2）are non-negative constants and ∑i=1^n-2ai=1.Some known results are improved under some sign and growth conditions. The proof is based on the Brouwer degree theory.