Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2022-06-06 Cooperative journals: 《计算机应用研究》
Abstract： Wei Songjie et al. proposed an identity-based signature scheme (named mIBS) , and used a security mediator (SEM) node to realize real-time revocation of entity identity in the mIBS scheme. The SEM held a part of the signature key, and generated a signature by working collaboratively with a signer. This paper analyzed the security of the mIBS scheme, found it had serious security flaws, and presented a specific attack instance. In the attack instance, a signer can stole the key held by the SEM through once normal signature interaction with a SEM, and then bypassed the SEM to implement a signature independently. This paper proposed an improved signature scheme (named mIBSG) . The mIBSG scheme remedied the security flaws of the original scheme by randomizing the private key held by the SEM. Further, this paper established a security model for mIBS scheme, named mEUF-CMIA, and defined a new type of adversary that simulated malicious but legitimate signers. The new adversary had the power to generate a forged signature independently through asking random oracles. Based on the new security model, this paper deduced the unforgeability of the mIBSG scheme as solving the CDH problem on a cyclic group. Comparative analysis showed that the mIBSG scheme achieved provable security with a small calculate efficiency loss. The mIBSG scheme can be used to build an IBC-based cross-domain authentication system.
Subjects: Dynamic and Electric Engineering >> Electrical Engineering submitted time 2019-03-05 Cooperative journals: 《电气工程学报》
Abstract：针对目前风电行业中较常见的变频柜等电气元件下置的方案，进行了优势 分析和缺点比较。以质量、动量和能量守恒定律以及标准湍流模型为建模理论基础， 通过 CFD 流体软件的计算，对塔筒底部变频柜工作环境的速度场和温度场进行了数值 分析。通过分析结果可以得出，加装了轴流风机进行强制通风换热的塔筒底部空间的 温度环境能够满足变频柜等各个电气部件正常工作的要求，同时，结合结构设计和布 局中的不合理之处，提出建议改进。本文提出的塔底空间风冷散热方案的计算，不仅 对风电机组结构布局的合理性有着重要意义，对风电机组机舱内及各个散热部件的计 算也具有一定的借鉴价值。
Subjects: Biology >> Botany >> Applied botany submitted time 2019-02-25 Cooperative journals: 《广西植物》
Abstract：世纬苣苔是中国特有珍稀植物，然而在植物志记载的模式产地贵州省“平伐”从来没有找到过该植物。模式产地考证信息的缺失，必然在世纬苣苔的鉴定和相关科学研究中产生一定混乱。作者从产地记载、标本形态、分子证据三个方面进行了考证，确认了世纬苣苔模式产地是贵州省“平坝”（安顺市），而植物志所记载的模式产地是对模式标本原始记录的错误翻译。考证结果提供了正确的模式产地，使世纬苣苔的鉴定、保护、研究具有了切实可靠的依据
Subjects: Medicine, Pharmacy >> Preclinical Medicine submitted time 2018-06-15 Cooperative journals: 《南方医科大学学报》
Abstract： Objective To investigate whether human RhoA is modified by SUMO. Methods Overlap extension PCR and double digestion technique were used to construct the eukaryotic expression vector pcDNA3-3flag-RhoA, which was identified by sequencing. The plasmid was transfected into HEK293T cells and its expression was detected by Western blotting. Immunofluorescence assay was used to detect whether RhoA is co-localized with SUMO. Co-Immunoprecipitation was used to detect whether RhoA is modified by SUMO. Results The recombinant plasmid pcDNA3-3flag-RhoA was successfully constructed and verified. Western blotting showed that the recombinant plasmid pcDNA3-3flag-RhoA expressed abundant fusion protein in HEK293T cells. Immunofluorescence showed that RhoA was co-localized with SUMO2/3 but not with SUMO1. Co-immunoprecipitation verified that RhoA was modified by SUMO2/3 but not SUMO1. Conclusion Human RhoA is modified by SUMO2/3 and probably participates in the regulation of axon regrowth after nervous system injury.
Subjects: Library Science，Information Science >> Information Science submitted time 2017-11-05 Cooperative journals: 《智库理论与实践》
Abstract： [Purpose/significance] In the Internet age, university think tanks should actively take full advantage of Internet technology to promote and expand their attention and influence. Baidu search index is used to evaluate the attention, activity and influence of university think tanks. [Method/process] This paper analyzed the institutional name, geographical distribution, the background of the university think tanks. At the same time, the accuracy of Baidu search index was decided by the network stability, the accuracy of Baidu search technology and the development of the history, stability and other factors of university think tanks. [Result/conclusion] The university think tanks should further make full use of the Internet, improve the activity and the Internet influence, and take full use of the superior resources in their universities. Local universities should make use of their owe advantages, and follow the development path with their characteristics.
Subjects: Library Science，Information Science >> Library Science submitted time 2017-10-27 Cooperative journals: 《智库理论与实践》
Abstract：大学智库以其学科齐全、人才密集、身份独立和对外交流广泛等优势成为中国特色新型智库体系的重要组成部分。论文从中国大学智库评价的理论意义和逻辑方法出发，提出了大学智库评价的“三维模型”，即维度1：与中国特色新型智库认定标准与任务要求相关性的评价谓之“契合度”；维度2：从量的角度，通过各类公共数据信息平台对大学智库机构和首席专家的表征搜索的评价谓之“活跃度”；维度3：从质的角度，通过资政建言采纳、理论研究成果、智库人才培养呈现状态的评价谓之“贡献度”。并研究了基于“三维模型”的大学智库的评价指标体系，以期为中国大学智库的建设和发展提供思路和指向。
Subjects: Biology >> Zoology submitted time 2017-10-10 Cooperative journals: 《动物营养学报》
Abstract：为考察饲料中添加龙须菜对草鱼生长性能、血清生化指标及肌肉脂肪酸组成的影响，试验共配制了6种龙须菜添加比例分别为0（对照组）、1%、2%、3%、4%和5%的等氮等脂饲料，投喂平均体重为(15.94±0.10) g的草鱼8周。每种饲料投喂4个水箱（重复），每箱30尾。结果显示：1）饲料中不同添加比例龙须菜对草鱼的增重率(WGR)、特定生长率(SGR)、存活率(SR)及饲料效率(FE)没有显著影响（P>0.05）。2）各试验组的肝体指数(HSI)均高于对照组，对照组与除5%添加组外的其他试验组的差异均达到显著水平（P0.05），而饲料中不同添加比例龙须菜对全鱼粗灰分与粗脂肪、肝脏粗脂肪及肌肉水分含量有显著差异（P0.05）。5）饲料中龙须菜的添加比例影响了草鱼肌肉脂肪酸的组成，除C14:1、C20:0、C20:2外，其他肌肉脂肪酸的含量均受到饲料中龙须菜的添加比例的显著影响（P<0.05），其中肌肉多不饱和脂肪酸（PUFA）含量及n-3/n-6 PUFA均在3%添加组获得最高值。1%、2%、3%、4%和5%添加组肌肉C20:5(EPA)、C22:5(DPA)、C22:6(DHA)以及EPA+DHA的含量都显著高于对照组（P<0.05）。由此得出，饲料中添加一定比例的龙须菜对草鱼的生长性能没有显著影响，但能降低血脂含量，影响草鱼肌肉脂肪酸的组成，并能提高功能脂肪酸DHA、EPA及PUFA的含量；饲料中添加3%的龙须菜能更好的增加肌肉功能性脂肪酸含量，而添加5%的龙须菜则草鱼生长相对较好，降低血脂效果更加明显。
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