不同株系丹参有效成分比较研究

为比较不同株系之间丹参有效成分的差异,采用高效液相色谱法测定丹参中包括丹参酮ⅡA在内的4种脂溶性成分和包括丹酚酸B在内的3种水溶性成分的含量,并应用SPSS软件对所得数据进行分析。通过对两大类成分的比较,发现10种株系丹参中,3、7号株系的脂溶性成分含量较高,可考虑培育为脂溶性成分提取原料;而1、9、10号株系的水溶性成分较高,可考虑培育为水溶性成分提取原料。显著性分析结果表明,所测10种不同株系丹参在其主要水溶性和脂溶性成分上存在显著差异。该研究可以为丹参优良种质的筛选提供依据。     

互联网能耗和性能优化的权衡模型

互联网能耗和性能互为矛盾已经成为网络研究人员的广泛共识. 目前的研究方法通常仅将其中一个方面作为主要问题，而将另外一方面作为次要问题来解决. 因此，如何将互联网能耗和性能作为同等重要的指标进行协同优化，是本文所要研究的问题. 本文提出了一种通用优化模型来实现减小互联网能耗的同时提升网络性能. 为将其应用于实际，本文通过引入并定义代价函数和功率-带宽函数，将该通用模型具体化为一个线性规划模型. 评估结果显示，该线性规划模型的最优解能够同时降低网络的最大链路利用率和能耗，并且使得这两者中的每一个指标均近似于对其进行单一优化的模型的最优解，从而实现了对网络能耗和性能的协同优化. 与当前互联网相比，在最大链路利用率方面，本文所提出模型的最优解最多可将其减小60.6%，最少减小45.8%；在能耗方面，该模型的最优解最多可将其减小83.3%，最少减小56.7%.     

高校学报评审专家数据库管理系统的设计与实现

针对部分高校学报对审稿人的信息管理不够完善,并且难以系统维护专家数据库,不能及时获取专家的相关信息而导致影响稿件正常审阅工作的问题,文中提出了基于Web平台的高校学报评审专家数据库管理系统的架构,设计开发了专家信息数据库管理系统的管理功能、查询功能和维护功能模块。同时,研究提出了主要功能模块在SQL Server数据库平台和C#语言支持下的实现方法。该系统可实现编辑部的资源共享,有助于编辑在较短的时间内准确、快捷、方便地找到合适的审稿专家,确保期刊的学术质量。     

DanHong Injection inhibits the development of primary abdominal aortic aneurysms in apoE knockout mice

Clinical observations indicate that DanHong Injection （DHI） can increase blood flow and reduce various syndromes in patients with cardiovascular disease. How- ever, it still needs to define the function of DHI and the involved mechanisms in details, such as the protective effect on the development of primary abdominal aortic aneurysms （AAAs）. In this study, we determined whether DHI is able to inhibit AAA in apoE knockout （apoE-/-） mice. Thirty apoE-/- male mice on high-fat diet （0.5 % cholesterol, 21% fat） were randomly divided into two groups and received i.p. injection of saline （100 μL/day） and DHI （100 μL/day）, respectively, for 16 weeks. At the end of experiment, we determined the development of atherosclerosis in en face aorta and aneurysms,pathological morphology of arterial wall, and serum lipid levels. We also determined the expression of monocyte chemoattractant protein-1 （MCP-1）, MMP-2, and MMP-9 mRNA in aortic wall using real-time RT-PCR. Our results indicated that high-fat diet induced the development of AAAs in apoE-/- mice, but the induction was totally blocked by DHI （P 〈 0.01）. The result of staining of abdominal aortic cross sections showed that DHI main- tained the collagen content in arterial wall, thereby pre- venting the animals from the development of AAA. Although DHI had little effect on serum total- and LDL- cholesterol levels, it reduced the expression of MCP-1, MMP-2, and MMP-9 mRNA in aortic wall （P 〈 0.01）. Taken together, our study suggests that DHI can inhibit the high-fat diet-induced AAA formation. The inhibitory effects may be related to the maintenance of the collagen content and inhibition of expression of AAA-related genes. Our study may suggest a new application of DHI in clinics.     

2类氨氧化菌的生态特性及其应用研究进展

氮素作为组成生物体的重要元素，一直以其独特的方式在自然界中循环。经典氮循环理论认为细菌的好氧氨氧化是氧化氨氮的唯一途径，然而，随着生物技术的发展，新的氮循环途径被不断发现，其中的古菌好氧氨氧化以及厌氧氨氧化过程，由于其突出的生态及工程应用重要性，成为学术界的研究热点。本文主要综述了氮循环新途径中的厌氧氨氧化以及古菌好氧氨氧化过程的发现及研究现状，并进一步探讨了这两类氨氧化菌的研究及应用前景。     

Lattice-Based Double-Authentication-Preventing Ring Signature for Security and Privacy in Vehicular Ad-Hoc Networks

Amidst the rapid development of the Internet of Things(IoT), Vehicular Ad-Hoc NETwork(VANET), a typical IoT application, are bringing an ever-larger number of intelligent and convenient services to the daily lives of individuals. However, there remain challenges for VANETs in preserving privacy and security. In this paper, we propose the first lattice-based Double-Authentication-Preventing Ring Signature(DAPRS) and adopt it to propose a novel privacy-preserving authentication scheme for VANETs, offering the potential for security against quantum computers. The new construction is proven secure against chosen message attacks. Our scheme is more efficient than other ring signature in terms of the time cost of the message signing phase and verification phase, and also in terms of signature length. Analyses of security and efficiency demonstrate that our proposed scheme is provably secure and efficient in the application.     

Two Innovative Coalition Formation Models for Dynamic Task Allocation in Disaster Rescues

This paper addresses the problem of multi-objective coalition formation for task allocation. In disaster rescue, due to the dynamics of environments, heterogeneity and complexity of tasks as well as limited available agents, it is hard for the single-objective and single (task)-to-single (agent) task allocation approaches to handle task allocation in such circumstances. To this end, two multi-objective coalition formation for task allocation models are proposed for disaster rescues in this paper. First, through coalition formation, the proposed models enable agents to cooperatively perform complex tasks that cannot be completed by single agent. In addition, through adjusting the weights of multiple task allocation objectives, the proposed models can employ the linear programming to generate more adaptive task allocation plans, which can satisfy different task allocation requirements in disaster rescue. Finally, through employing the multi-stage task allocation mechanism of the dynamic programming, the proposed models can handle the dynamics of tasks and agents in disaster environments. Experimental results indicate that the proposed models have good performance on coalition formation for task allocation in disaster environments, which can generate suitable task allocation plans according to various objectives of task allocation.     

实现船舶稳性的多油舱自适应调度算法及仿真

针对油舱对船舶浮态与稳性的影响，研究了保持船舶稳性的多油舱自适应调度控制算法，并用WinCC (Windows Control Center)组态软件编写了船舶自动浮态调整仿真系统。在系统架构上，采用布尔逻辑表构建了油舱、泵、管路之间的连通关系，并根据浮态方程计算出舱群之间的调驳油量，再根据多变量多约束的自适应优化调度算法实现了油舱驳油过程中浮态的平衡。仿真结果表明调度算法可以对船舶的浮态进行有效调整，并保持船舶稳性，避免了由油舱油量分布不均给船舶带来的不利影响，保障了航行安全。     

基于生成对抗网络的无载体信息隐藏

提出了一种基于生成对抗网络的无载体信息隐藏方法.发送方用伪装图像和Improved Wasserstein GAN生成一张与秘密图像相同的图像,发送方发送伪装图像,接收方收到伪装图像后用生成器生成和秘密图像视觉上相同的图像.与现有的信息隐藏方法相比,该方法不需要修改载体,能够有效地抵抗隐写分析工具的检测,能够达到秘密信息安全传输的目的.