互联网的发展为大学生寻求兼职带来便利的同时也带来了一系列困扰。本研究通过问卷调查法收回104份有效问卷进行描述性统计分析,以探究北京大学生通过网络平台寻求兼职的现状及原因。本研究提出了加强平台安全性、提升平台信息准确性、...互联网的发展为大学生寻求兼职带来便利的同时也带来了一系列困扰。本研究通过问卷调查法收回104份有效问卷进行描述性统计分析,以探究北京大学生通过网络平台寻求兼职的现状及原因。本研究提出了加强平台安全性、提升平台信息准确性、增强平台反馈效率性的建议,并搭建了高度安全性、高信息准确性、高反馈效率性的北京兼职寻求微信公众号平台“创兼未来”。本研究有利于优化网络平台设计,并为北京高校大学生网络平台寻求兼职之路提供坚实支撑。Internet development brings convenience but also troubles college students when they are seeking part-time jobs. This study collected 104 valid questionnaires through a questionnaire survey to explore the issues of Beijing college students seeking part-time jobs through online platforms. This study proposes suggestions for strengthening online platform’s security, information accuracy, and feedback efficiency. This study also builds a Beijing part-time job-seeking WeChat Public Account Platform, “Chuang-Jian Wei Lai,” with high security, high information accuracy, and high feedback efficiency. This study is conducive to optimizing the design of online platforms and providing solid support for Beijing college students to seek part-time jobs on online platforms.展开更多
An inevitable consequence of the development of the offshore petroleum industry is the eventual obsolescence of large offshore structures. Proper methods for removal of decommissioned offshore platforms are becoming a...An inevitable consequence of the development of the offshore petroleum industry is the eventual obsolescence of large offshore structures. Proper methods for removal of decommissioned offshore platforms are becoming an important topic that the oil and gas industry must pay increasing attention to. While removing sections from a decommissioned jacket platform, the stability of the remaining parts is critical The jacket danger indices D ~ and Ds defined in this paper are very useful for analyzing the safety of any procedure planned for disassembling a jacket platform. The safest piles cutting sequence can be determined easily by comparing every column of Do and Ds or simply analyzing the figures of every row ofD o and D,.展开更多
The current study is developed based on one of the types of subgrade rupture risk suggested by Selig and Waters （1994）. It aims to evaluate subgrade stability railroad, which consists of the slope stability analysis...The current study is developed based on one of the types of subgrade rupture risk suggested by Selig and Waters （1994）. It aims to evaluate subgrade stability railroad, which consists of the slope stability analysis of a railway yard embankment subjected to a wagon load type gondola parked on this track. This proposed analysis was taken into consideration because there are Brazilian railroads in high deterioration level. In some of these lines the tracks are submitted to increasing amount of load every year. The adopted model slope stability to the studied railroad embankments considers the rupture on circular line. It was applied the Geoslope-Slope/W software, version 6, to the evaluation of the platform-slope system. Several situations are adopted to reach the minimum safety slope, permitting to analyze the platform stability to keep railroad traffic under adequate safety level.展开更多
With the rapid development and wide application of network technology, information security issues are increasingly highlighted, received more and more attention. This article introduces the present situation of netwo...With the rapid development and wide application of network technology, information security issues are increasingly highlighted, received more and more attention. This article introduces the present situation of network information security, discusses the connotation of network information security, and analyzes the main threat to the security of the network information. And we separately detailed description of the data monitoring platform architecture from the data layer, network layer and presentation layer three levels, focuses on the functional structure of intelligent database platform, and puts forward to measures that ensure the safety of the platform and the internal data security. Through the design of the platform to improve the information security system has certain significance.展开更多
In this paper, we propose a new lightweight block cipher named RECTANGLE. The main idea of the design of RECTANGLE is to allow lightweight and fast implementations using bit-slice techniques. RECTANGLE uses an SP-netw...In this paper, we propose a new lightweight block cipher named RECTANGLE. The main idea of the design of RECTANGLE is to allow lightweight and fast implementations using bit-slice techniques. RECTANGLE uses an SP-network. The substitution layer consists of 16 4 × 4 S-boxes in parallel. The permutation layer is composed of 3 rotations. As shown in this paper, RECTANGLE offers great performance in both hardware and software environment, which provides enough flexibility for different application scenario. The following are3 main advantages of RECTANGLE. First, RECTANGLE is extremely hardware-friendly. For the 80-bit key version, a one-cycle-per-round parallel implementation only needs 1600 gates for a throughput of 246 Kbits/s at100 k Hz clock and an energy efficiency of 3.0 p J/bit. Second, RECTANGLE achieves a very competitive software speed among the existing lightweight block ciphers due to its bit-slice style. Using 128-bit SSE instructions,a bit-slice implementation of RECTANGLE reaches an average encryption speed of about 3.9 cycles/byte for messages around 3000 bytes. Last but not least, we propose new design criteria for the RECTANGLE S-box.Due to our careful selection of the S-box and the asymmetric design of the permutation layer, RECTANGLE achieves a very good security-performance tradeoff. Our extensive and deep security analysis shows that the highest number of rounds that we can attack, is 18(out of 25).展开更多
文摘互联网的发展为大学生寻求兼职带来便利的同时也带来了一系列困扰。本研究通过问卷调查法收回104份有效问卷进行描述性统计分析,以探究北京大学生通过网络平台寻求兼职的现状及原因。本研究提出了加强平台安全性、提升平台信息准确性、增强平台反馈效率性的建议,并搭建了高度安全性、高信息准确性、高反馈效率性的北京兼职寻求微信公众号平台“创兼未来”。本研究有利于优化网络平台设计,并为北京高校大学生网络平台寻求兼职之路提供坚实支撑。Internet development brings convenience but also troubles college students when they are seeking part-time jobs. This study collected 104 valid questionnaires through a questionnaire survey to explore the issues of Beijing college students seeking part-time jobs through online platforms. This study proposes suggestions for strengthening online platform’s security, information accuracy, and feedback efficiency. This study also builds a Beijing part-time job-seeking WeChat Public Account Platform, “Chuang-Jian Wei Lai,” with high security, high information accuracy, and high feedback efficiency. This study is conducive to optimizing the design of online platforms and providing solid support for Beijing college students to seek part-time jobs on online platforms.
基金Supported by the Open Foundation of the State Key Lab for Ocean Engineering of Shanghai Jiao Tong University under Grant No.0602
文摘An inevitable consequence of the development of the offshore petroleum industry is the eventual obsolescence of large offshore structures. Proper methods for removal of decommissioned offshore platforms are becoming an important topic that the oil and gas industry must pay increasing attention to. While removing sections from a decommissioned jacket platform, the stability of the remaining parts is critical The jacket danger indices D ~ and Ds defined in this paper are very useful for analyzing the safety of any procedure planned for disassembling a jacket platform. The safest piles cutting sequence can be determined easily by comparing every column of Do and Ds or simply analyzing the figures of every row ofD o and D,.
文摘The current study is developed based on one of the types of subgrade rupture risk suggested by Selig and Waters （1994）. It aims to evaluate subgrade stability railroad, which consists of the slope stability analysis of a railway yard embankment subjected to a wagon load type gondola parked on this track. This proposed analysis was taken into consideration because there are Brazilian railroads in high deterioration level. In some of these lines the tracks are submitted to increasing amount of load every year. The adopted model slope stability to the studied railroad embankments considers the rupture on circular line. It was applied the Geoslope-Slope/W software, version 6, to the evaluation of the platform-slope system. Several situations are adopted to reach the minimum safety slope, permitting to analyze the platform stability to keep railroad traffic under adequate safety level.
文摘With the rapid development and wide application of network technology, information security issues are increasingly highlighted, received more and more attention. This article introduces the present situation of network information security, discusses the connotation of network information security, and analyzes the main threat to the security of the network information. And we separately detailed description of the data monitoring platform architecture from the data layer, network layer and presentation layer three levels, focuses on the functional structure of intelligent database platform, and puts forward to measures that ensure the safety of the platform and the internal data security. Through the design of the platform to improve the information security system has certain significance.
基金supported by National Natural Science Foundation of China(Grant No.61379138)Research Fund KU Leuven(OT/13/071)+1 种基金"Strategic Priority Research Program"of the Chinese Academy of Sciences(Grant No.XDA06010701)National High-tech R&D Program of China(863 Program)(Grant No.2013AA014002)
文摘In this paper, we propose a new lightweight block cipher named RECTANGLE. The main idea of the design of RECTANGLE is to allow lightweight and fast implementations using bit-slice techniques. RECTANGLE uses an SP-network. The substitution layer consists of 16 4 × 4 S-boxes in parallel. The permutation layer is composed of 3 rotations. As shown in this paper, RECTANGLE offers great performance in both hardware and software environment, which provides enough flexibility for different application scenario. The following are3 main advantages of RECTANGLE. First, RECTANGLE is extremely hardware-friendly. For the 80-bit key version, a one-cycle-per-round parallel implementation only needs 1600 gates for a throughput of 246 Kbits/s at100 k Hz clock and an energy efficiency of 3.0 p J/bit. Second, RECTANGLE achieves a very competitive software speed among the existing lightweight block ciphers due to its bit-slice style. Using 128-bit SSE instructions,a bit-slice implementation of RECTANGLE reaches an average encryption speed of about 3.9 cycles/byte for messages around 3000 bytes. Last but not least, we propose new design criteria for the RECTANGLE S-box.Due to our careful selection of the S-box and the asymmetric design of the permutation layer, RECTANGLE achieves a very good security-performance tradeoff. Our extensive and deep security analysis shows that the highest number of rounds that we can attack, is 18(out of 25).
