Although currently seatbelts and airbags are world widely used, there are still more than 40,000 people killed annually in traffic accidents. Referred to David Breed's "Road to Zero Fatalities" (RtZF/spl...
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Although currently seatbelts and airbags are world widely used, there are still more than 40,000 people killed annually in traffic accidents. Referred to David Breed's "Road to Zero Fatalities" (RtZF/spl reg/) concept, this paper mainly discusses how to develop and deploy a safety warning system using high precision digital road maps and a combination of various vehicle status sensory techniques, without or with a minimum requirement of additional road infrastructures. This system will help to avoid accidents and enhance safety by warning drivers of possible hazardous situations in advance.
作者：
Ashkenazi, VChao, CHJChen, WHill, CJMoore, T[a1 ](Institute of Engineering Surveying and Space Geodesy
The University of Nottingham)This paper describes an advanced method and the corresponding algorithms which could provide a high precision Wide Area Differential GPS (WADGPS). The service would be suitable for single or dual frequency users and could be introduced with very few reference stations. The two main components of the service are a precise near real-time orbit determination of the GPS satellites and an accurate estimation and modelling of ionospheric and tropospheric effects. Broad principles of the processing algorithms and results of both simulation and real data tests are described. User positioning accuracies of better than 25 m (r.m.s.) in plan and 30 m (r.m.s.) in height are achieved by both single and dual frequency scenarios.Wide Area Differential GPS (WADGPS) is being developed to overcome the main drawbacks of conventional or Local Area Differential GPS (LADGPS) where positional accuracy of a user degrades as the reference-to-user separation increases. The spatial decorrelation of the error sources notably the atmospheric propagation and satellite orbital errors inherent in GPS are the main causes of this accuracy degradation. Several organizations are involved in WADGPS research and different conceptual approaches have been suggested. The proposed methods all share a common basic assumption: that the error sources which affect the system are broken down into individual error components and are modelled separately. The variance between the different techniques comes from the way in which the different error components are modelled.
This paper describes an advanced method, and the corresponding algorithms, which could provide a high precision Wide Area Differential GPS (WADGPS). The service would be suitable for single or dual frequency users, an...
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This paper describes an advanced method, and the corresponding algorithms, which could provide a high precision Wide Area Differential GPS (WADGPS). The service would be suitable for single or dual frequency users, and could be introduced with very few reference stations. The two main components of the service are a precise, near real-time orbit determination of the GPS satellites, and an accurate estimation and modelling of ionospheric and tropospheric effects. Broad principles of the processing algorithms and results of both simulation and real data tests are described. User positioning accuracies of better than 2.5 m (r.m.s.) in plan and 3.0 m (r.m.s.) in height are achieved by both single and dual frequency scenarios.
作者：
TSUNOO, YOKAMOTO, EUEMATSU, TMemberNEC Software Hokuriku
Ltd. Ishikawa Japan 920-21 School of Information Science
Japan Advanced Institute of Science and Technology Ishikawa Japan 923-12 MembersTomohiko Uyematsu graduated in Electrical Engineering from Tokyo Institute of Technology in 1982 and received a Master's degree from the same university in 1984
after whichhe became an assistant in the Electrical and Electronics Engineering Department there. In1990 he became a Lecturer and in 1991 an Assistant Professor. In 1992 he became Assistant Professor at the School of Information Science Japan Advanced Institute of Science and Technology. He holds a doctorate in engineering. Among his research interests are signal theory optical communications theory coding theory and data compression algorithms. In 1988 he received a Shinohara Commemorative Science Encouragement Prize and in 1992 a Best Paper Award. He is the author of the bookIntroduction to Record Data Compression Algorithms. He is a member of the Measurement Control Society and the Society for Information Theory and Its Applications.
Cryptology provides the technological basis for guaranteed network security. In the field of business, to guarantee the security of information, everyone needs easy-to-use cryptology. Starting with the announcement by...
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Cryptology provides the technological basis for guaranteed network security. In the field of business, to guarantee the security of information, everyone needs easy-to-use cryptology. Starting with the announcement by the U.S. National Bureau of Standards of the DES cryptosystem and the proposal by NTT of the FEAL cryptosystem, secret-key cryptographic algorithms have been published, involution-type block cryptosystems which use secret key to encipher 64 bits of plain text as 64 bits of cipher text [2, 3, 9, 10, 12]. NTT has proposed the one-way function MAP, which is also an involution-type transform. In this paper, we study a new cryptanalytic method for involution-type cryptosystems and show by example that it can be applied practically in a ciphertext-only attack on the one-way function MAP. For an involution-type cryptosystem, by increasing the amount of construction in the data-randomization phase and by increasing the size of the secret key, we can guarantee the computational security by preventing the estimation of the secret key. However, if we study the properties of the function used in the design of the data-randomization phase, by specifying input/output values of the function which are independent of the secret key, it may be possible to use the inverse function [11] to calculate the secret key. This method is called the intermediate cipher method. The intermediate cipher method differs from previous methods in the small quantity of data required for breaking.
Text style transfer plays a vital role in online entertainment and social media. However, existing models struggle to handle the complexity of Chinese long texts, such as rhetoric, structure, and culture, which restri...
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Text style transfer plays a vital role in online entertainment and social media. However, existing models struggle to handle the complexity of Chinese long texts, such as rhetoric, structure, and culture, which restricts their broader application. To bridge this gap, we propose a Chinese Article-style Transfer (CAT-LLM) framework, which addresses the challenges of style transfer in complex Chinese long texts. At its core, CAT-LLM features a bespoke pluggable Text Style Definition (TSD) module that integrates machine learning algorithms to analyze and model article styles at both word and sentence levels. This module acts as a bridge, enabling large language models (LLMs) to better understand and adapt to the complexities of Chinese article styles. Furthermore, it supports the dynamic expansion of internal style trees, enabling the framework to seamlessly incorporate new and diverse style definitions, enhancing adaptability and scalability for future research and applications. Additionally, to facilitate robust evaluation, we created ten parallel datasets using a combination of ChatGPT and various Chinese texts, each corresponding to distinct writing styles, significantly improving the accuracy of the model evaluation and establishing a novel paradigm for text style transfer research. Extensive experimental results demonstrate that CAT-LLM, combined with GPT-3.5-Turbo, achieves state-of-the-art performance, with a transfer accuracy F1 score of 79.36% and a content preservation F1 score of 96.47% on the “Fortress Besieged” dataset. These results highlight CAT-LLM's innovative contributions to style transfer research, including its ability to preserve content integrity while achieving precise and flexible style transfer across diverse Chinese text domains. Building on these contributions, CAT-LLM presents significant potential for advancing Chinese digital media and facilitating automated content creation. Source code is available at GitHub.
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