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随着高速公路便捷、无感收费的持续发展，高速公路车辆轨迹信息的可靠认证逐渐成为公正、准确收费的关键支撑。针对现有系统逃费稽查时延高、海量数据检索耗时长、数据篡改可查性低等问题，基于高速公路车辆多主体多阶段运行状态的特点，从高速公路车辆行驶过程动态认证和车辆信息安全关联认证入手，通过多阶段认证内容分析、分布式网络认证共识、车辆信息主链关联、车辆轨迹侧链跟踪的综合关联分析，提出基于异构区块链技术的高速公路可靠行驶轨迹认证方法，实现了车辆信息实时稽查、轨迹信息链式关联的高速公路车辆的可靠轨迹认证。通过典型应用场景介绍，进一步分析了该方法在高速公路车辆行驶轨迹认证中的应用前景和应用价值。

统计前向规划（statistical forward planning，SFP）算法使用仿真模型（也称为前向模型）自适应地搜索有效的动作序列，此类算法提供了一种简单通用的方法，为各种游戏提供快速自适应的 AI 控制。介绍了两种常用的 SFP 算法：蒙特x卡罗树搜索和滚动层进化，并证明了在没有任何事先训练的情况下，SPF 算法就可以在各种视频游戏中出色地运行。

三芯光纤复合海底电缆（简称为"海缆"）在运输、敷设和运行的过程中经常会产生拉伸的机械行为,对其进行拉伸建模仿真,可获得实体试验难以得到的应力、应变等数据。文章通过建立海缆拉伸有限元模型,模拟了海缆的拉伸过程。首先根据海缆拉伸的力学特点对结构进行简化,得到三芯海缆的几何模型;然后对其施加约束及速度载荷,控制沙漏能,仿真轴向拉伸过程;最后对数据进行有效提取和处理,获得海缆的应力与应变,为研究海缆的力学性能、判断海缆工作状态提供了参考。

利用模糊数学理论对光网络中的多故障定位问题进行分析,得到了光网络中多故障定位的模糊聚类模型。根据由模糊聚类算法得到的专家系统和由此确定的告警和故障之间的隶属函数公式进行故障定位。在格状光网络拓扑下进行多故障定位仿真实验,得出故障定位成功率的对比图和时间性能的对比图。实验结果表明,模糊聚类算法可以高效快速地定位故障。

电力骨干光传送网是电力部门生产调度、信息通信的基础,提高其生存性是近几年的研究热点。文章结合电力骨干光传送网对保护的需求,提出了一种SDP（基于Suurballe算法的专有保护）算法。仿真结果表明,SDP算法比传统的DDP（基于Dijkstra算法的专有保护）算法有更低的阻塞率和资源占用率,适用于需要专有保护的电网业务。

针对弹性分组环（Resilient Packet Ring,RPR）技术中的源路由和环回两种保护倒换机制的不足,文章提出了一种新型保护倒换机制———源节点保护倒换,并对这种保护倒换机制的性能进行了分析。源节点保护倒换克服了源路由保护倒换存在的严重的丢包现象,避免了包失序问题,同时减小了环回保护倒换产生的较大时延和不必要的带宽浪费,充分提高了RPR中保护倒换的性能。

光网络中引入了共享风险链路组（SRLG）的概念,要求工作通道与保护通道不能处于同一个SRLG之中。文章提出了一种基于SRLG限制的动态共享通道保护算法——动态链路权重配置（Dynamic Link Weight Configuration,DLWC）算法,该算法的关键在于为链路定义了两个动态权重。在计算工作通道和保护通道时,它能综合解决SRLG限制、动态负载均衡和自陷等3个关键问题。

文章对动态自相似业务在多纤IP over WDM网中的联合恢复问题进行了系统的研究,提出了3种联合恢复策略,算法的实现基于一种扩展的多纤分层图模型。通过大量的动态仿真实验,以业务中断率和恢复效率为性能指标,研究了上述3种恢复策略在不同自相似参数（突发度、均值和方差）中的性能,最后通过分析和比较得出联合通道恢复策略是最优的。

文章针对波分复用（WDM）光网络的工作机制,提出了有向P圈的概念和WDM网络基于有向P圈的保护机制及配置策略。同时,提出了对偶圈合并法则和以此为基础的P圈生成和网络保护资源配置启发式算法。为了验证配置方案的有效性,利用OPNET Modeler搭建了自动交换光网络（ASON）-WDM仿真平台,在泛欧COST239网络拓扑和北美NSFnet网络拓扑上进行了大量仿真。仿真结果证明了P圈生成算法和有向P圈配置策略的有效性和可行性。

目前实现以太环网功能主要有两种方式:基于二层交换方式的以太共享环网和内嵌的弹性分组环（RPR）环网。文章主要研究了这两种方案的技术特点,并通过比较分析给出组网方案建议。

光虚拟专用网络（OVPN）是一种新兴的光网络增值业务,光网络的智能化也为OVPN代理了新的功能,使得OVPN客户可以通过服务提供商网络的智能控制平面获得智能带宽提供服务.文章对OVPN的管理实现方案进行分析,提出了基于JMAPI的管理结构,并对用于OVPN的核心管理对象模型和事件通知机制进行了分析设计.

波长变换技术是波分复用全光网关键技术之一。本文综述了波长变换技术对网络的逻辑拓扑结构设计、网络的性能以及网络的管理和控制的影响。

虚波长通道是充分发挥 WDM光网络带宽资源的关键所在 ,而波长变换器又是实现虚波长通道的根本途径。本文在介绍目前重要的全光波长变换器的同时 ,对它们进行了全面的分类和比较。并对它们的优缺点进行了深入的分析。

文章首先描述了自动交换光网络（ASON）中服务等级协定（SLA）的含义,然后提出了ASON中实现SLA的一种方法,并建立了相应的数学模型,在此基础上搭建了相应的仿真环境,最后对仿真结果进行分析,得出了一些重要结论,供读者参考。

文章提出了一种自动交换光网络（ASON）控制平面管理接口的实现方案.我们首先对接口功能需求进行了分析,然后提出了控制平面的管理信息模型,并对接口信息进行了分类,最后介绍了接口中的信息交互流程.从而为实现对控制平面的管理提供了理论指导.

提出了一次性查找出所有简单路由的算法.为查询子网管理系统（SNMS）管理域中任意两个插/分处处用器（ADM）网元之间所有路由上的空闲时隙,此路由算法一次性计算出从起点网元（NE）到终点NE的所有可用路由,经实践验证,存储量需求和计算时间较好.

操作、管理和维护（OA＆M）信息的传输和处理是智能光网络的关键技术之一.文章首先对比光传送网络（OTN）中OA＆M需求,分析了智能光网络中OA＆M需求的变化.然后,针对OA＆M传输机制、处理复杂度和带宽占用3个方面,讨论了OA＆M系统在智能光网络中实现的难点,比较了现有的处理手段.在此基础上,提出了结合多种消息传输方式,分层、分域处理实现OA＆M系统的思想.最后,按照这种思想,设计了一种适用于智能光网络的OA＆M原型系统.

Objective: To investigate the trend and related factors of suicidal ideation in college students over a nine-year period. Methods: A multi-stage stratified sampling method was employed to select mental health survey data from college students in Beijing between 2007 and 2015 (n=9716). The survey utilized the items of suicidal ideation and behavior from the National Comorbidity Survey Replication (NCS-R), Center for Epidemiologic Studies-Depression Scale (CESD), and Multidimensional Scale of Perceived Social Support (MSPSS). Linear decomposition regression analysis was conducted to examine the factors contributing to the decline in suicidal ideation. Results: The average suicidal ideation score decreased from 0. 24 in 2007 to 0. 13 in 2015. There was a positive correlation between suicidal ideation score and CESD score (r = 0. 30, P<0.001), while a negative correlation existed between suicidal ideation scores and MSPSS scores (r=-011, P<0.001). The results of the regression analysis revealed that the decline in suicidal ideation was more significant in female students than in male students (β= -0.030, -0.017, Ps <0.05), and urban college students exhibited a faster reduction in suicidal ideation than their rural counterparts (β = 0.026, 0.016, Ps <0.05). Individuals born in later cohorts had higher suicidal ideation scores than earlier cohorts (β = 0.012, P<0.05). Conclusion: It suggests that suicidal ideation has shown a decreasing trend during the survey period, while it is more prevalent in younger cohorts. In addition, depression and social support are found to be associated with suicidal ideation. [ABSTRACT FROM AUTHOR]

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Objective: To explore the suicidal ideation and related factors in college students with visual and hearing disabilities. Methods: Totally 540 college students with visual and hearing disabilities in a special education. college in Beijing were selected. They were assessed with the National Comorbidity Survey Replication (NCS-R) for suicidal ideation and behavior, Psychological Strain Scale (PSS-40), Depression, Anxiety and Stress Scale (DASS-21), Index-Well-Being Scale (IWB), and Satisfaction with Life Scale (SWLS). Results: The scores of NCS-R were higher in female students with visual and hearing disabilities than in males (P<0.05). The results of regression analysis showed that female and depression scores were positively correlated with the total scores of NCS-R (β=0.69, 0.07, Ps <0.05), while IWB and SWLS scores were negatively correlated with the NCS-R total scores (β-0.03, 0. 06. Ps <0.05). Conclusion: It suggests that suicidal ideation may have higher levels in female college students with visual and hearing disabilities, and is associated with depression, subjective well-being. and life satisfaction. [ABSTRACT FROM AUTHOR]

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对全光通信网进行有效的管理是全光通信网有效可靠运行的保证，而状态监测是全光网络管理的前提和依据。本文分析了全光网络中各种单元的监测方法，并利用１．３１μｍ波长的光监测通道，实现了对一个全光实验网中一个网络节点的远端和本地光发射机光源的状态和光开关控制信号的实时监测。

在几种典型的气象下，分别对两种结构不同的自承式架空光缆进行了力学性能分析。在大跨距条件下用悬链法计算了光缆的相对伸长量与增强层厚度的关系曲线。其结果对架空光缆的优化设计与生产有重要的指导意义。

论述了一种大芯径束管式非金属铠装光缆的结构和特点，通过实测数据说明此缆具有较好的性能价格比。

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To explore the current status of soil quality in Pinggu District, Beijing, this study considered microbial factors based on the traditional comprehensive evaluation system of soil quality. A total of 228 samples were collected using grid-based sampling, and 11 soil indicators were selected considering the three dimensions of soil fertility, soil environment, and soil microorganisms. The soil quality index method was used to quantitatively analyze each indicator and calculate the soil quality index to comprehensively evaluate the soil quality in Pinggu District, Beijing. The results showed that the Integrated Soil Quality Index(ISQI)of Pinggu District ranged from good to excellent (0.60-0.96), with a mean value of 0.74, and the average integrated soil quality evaluation grade was good. Overall spatial distribution showed that areas with low values were in the south and west, whereas high values were obtained in the north and east, respectively. The northern areas, such as Xiong′ erzhai, Huangsongyu, and east area Jinmeihu, were mostly in mountainous or woodland regions, rich in vegetation with few human activities, with high levels of soil fertility, rich in microorganisms, and had a relatively high overall soil quality evaluation grade, whereas the southwestern areas, such as Mafang and Machangying towns, had low levels of soil fertility and few microorganisms, and a relatively low overall quality evaluation grade. The comprehensive quality evaluation grade was relatively low. The ISQI of Xiong′ erzhai Town was the highest at 0.81 and that of Pinggu Town was the lowest at 0.64. The order of ISQI for different land use conditions in Pinggu District was orchard>forest land>wasteland>vegetable land>farmland. The results showed that the comprehensive evaluation grade of soil quality was good but different in spatial distribution in Pinggu District, Beijing. The northeastern part was mostly mountainous and forested, with a comprehensive evaluation grade of excellent; the central and southwestern parts were mostly agricultural vegetable land, with the comprehensive evaluation grade of good and medium, and should focus on scientific fertilization and soil quality management in the future. [ABSTRACT FROM AUTHOR]

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