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| 1 | 0.04 degree-per-hour MEMS disk resonator gyroscope with high-quality factor (510 k) and long decaying time constant(74.9 s)显示文摘The disk resonator gyroscope is an attractive candidate for high-performance MEMS gyroscopes.This gyroscope consists of a sensor and readout electronics,and the characteristics of the sensor directly determine the performance.For the sensor,a high-quality factor and long decaying time constant are the most important characteristics required to achieve high performance.We report a disk resonator gyroscope with a measured quality factor of 510 k and decaying time constant of 74.9 s,which is a record for MEMS silicon disk resonator gyroscopes,to the best of our knowledge.To improve the quality factor of the DRG,the quality factor improvement mechanism is first analyzed,and based on this mechanism two stiffness-mass decoupled methods,i.e.,spoke length distribution optimization and lumped mass configuration design,are proposed and demonstrated.A disk resonator gyroscope prototype is fabricated based on these design strategies,and the sensor itself shows an angle random walk as low as 0.001°/√h,demonstrating true potential to achieve navigation-grade performance.The gyroscope with readout electronics shows an angle random walk of 0.01°/√h and a bias instability of 0.04°/h at room temperature without compensation,revealing that the performance of the gyroscope is severely limited by the readout electronics,which should be further improved.We expect that the quality factor improvement methods can be used in the design of other MEMS gyroscopes and that the newly designed DRG can be further improved to achieve navigation-grade performances for high-end industrial,transportation,aerospace,and automotive applications. | Qingsong Li Dingbang Xiao Xin Zhou Yi Xu Ming Zhuo Zhanqiang Hou Kaixuan He Yongmeng Zhang Xuezhong Wu | 2018 | Microsystems & Nanoengineering2018，4，1： | 16 |
| 2 | Precision Balance Method for Cupped Wave Gyro Based on Cup-bottom Trimming显示文摘The mechanical balance process is the key process to eliminate the quadrature error and improve the performance of the cupped wave gyro.The conventional mechanical balance method for cupped wave gyro based on cup-wall trimming requires high control accuracy of trimming quantity,which increases the production cost and decreases the fabrication efficiency in large extent.However,it is hard to reach the high balance accuracy with the natural frequency split of mHz grade by using the conventional method.In this paper,the lumped mass dynamic model of the cupped wave gyro is built by discretization method,and the effects of different position trimming on the natural frequency are analyzed.It is pointed out that trimming off a tiny quantity of material from cup-wall causes large variation of the natural frequency is the main reason for the low accuracy of the conventional mechanical balance method.Then,a precision balance method for cupped wave gyro based on cup-bottom trimming is presented and the entire procedures of this method are given.The static balance process and dynamic balance process of the precision balance method are simulated by the finite element software.The simulation result shows that the precision balance method based on cup-bottom trimming brings less additional natural frequency split in the static balance process,minimizes the natural frequency split to mHz grade and rectify the angle of mode offset to 0.1° grade in the dynamic balance process,furthermore,the method decreases the requirement for control accuracy of trimming quantity evidently.The research work provides references for structure optimization design and balance process plan of the cupped wave gyro. | TAO Yi XI Xiang XIAO Dingbang TAN Yingqi CUI Hongjuan WU Xuezhong | 2012 | Chinese Journal of Mechanical Engineering2012，25，1： | 9 |
| 3 | Providing Location-Aware Location Privacy Protection for Mobile Location-Based Services显示文摘Location privacy has been a serious concern for mobile users who use location-based services provided by third-party providers via mobile networks. Recently, there have been tremendous efforts on developing new anonymity or obfuscation techniques to protect location privacy of mobile users. Though effective in certain scenarios, these existing techniques usually assume that a user has a constant privacy requirement along spatial and/or temporal dimensions, which may be not true in real-life scenarios. In this paper, we introduce a new location privacy problem: Location-aware Location Privacy Protection(L2P2) problem, where users can define dynamic and diverse privacy requirements for different locations. The goal of the L2P2 problem is to find the smallest cloaking area for each location request so that diverse privacy requirements over spatial and/or temporal dimensions are satisfied for each user. In this paper, we formalize two versions of the L2P2 problem, and propose several efficient heuristics to provide such location-aware location privacy protection for mobile users. Through extensive simulations over large synthetic and real-life datasets, we confirm the effectiveness and efficiency of the proposed L2P2 algorithms. | Yu Wang Dingbang Xu Fan Li | 2016 | Tsinghua Science and Technology2016，21，3： | 6 |
| 4 | A Versatile Method for Uniform Dispersion of Nanocarbons in Metal Matrix Based on Electrostatic Interactions显示文摘Realizing the uniform dispersion of nanocarbons such as carbon nanotube and graphene in metals, is an essential prerequisite to fully exhibit their enhancement effect in mechanical, thermal, and electrical properties of metal matrix composites(MMCs). In this work, we propose an effective method to achieve uniform distribution of nanocarbons in various metal flakes through a slurry-based method. It relies on the electrostatic interactions between the negatively charged nanocarbons and the positively charged metal flakes when mixed in slurry. For case study, flake metal powders(Al, Mg, Ti,Fe, and Cu) were positively charged in aqueous suspension by spontaneous ionization or cationic surface modification. While nanocarbons, given examples as carboxylic multi-walled carbon nanotubes, pristine single-walled carbon nanotube, and carbon nanotube–graphene oxide hybrid were negatively charged by the ionization of oxygen-containing functional groups or anionic surfactant. It was found that through the electrostatic interaction mechanism, all kinds of nanocarbons can be spontaneously and efficiently adsorbed onto the surface of various metal flakes. The development of such a versatile method would provide us great opportunities to fabricate advanced MMCs with appealing properties. | Zan Li Genlian Fan Zhanqiu Tan Zhiqiang Li Qiang Guo Dingbang Xiong Di Zhang | 2016 | Nano-Micro Letters2016，8，1： | 5 |
| 5 | Techniques and tools for analyzing intrusion alerts显示文摘 | Peng Ning Yun Cui Douglas S. Reeves Dingbang Xu | 2004 | ACM Transactions on Information and System Security (TISSEC)2004，，2： | 2 |
| 6 | Precision Balance Method for Cupped Waved Gyro Based on Cup-bottom Triming 显示文摘 | Tao Yi Xi Xiang Xiao Dingbang | 2011 | Chinese Journal of Mechanical Engineering ($2192-8258)2011，24，1： | 1 |
| 7 | A vision-oriented approach for innovative product design 显示文摘 | LIN CHYUNCHAU LUH DINGBANG | 2009 | Advanced Engineering lnformatics2009，23，2： | 1 |
| 8 | Design,analy-sis and experiment of a novel ring vibratory gyroscope显示文摘 | TAOYi WU Xuezhong XIAO Dingbang | 2011 | Sen-sors and Actuators A:Physical2011，168，2： | 1 |
| 9 | Hypothesizing and reasoning about attacks missed by intrusion detection systems 显示文摘 | Peng Ning Xu Dingbang | 2004 | ACM Transactions on Information and System Security2004，7，4： | 1 |
| 10 | A vision-oriented ap proach for innovative product design显示文摘 | LIN Chyunchau LUH Dingbang | 2009 | Advanced Engineering Informatics2009，23，2： | 1 |
| 11 | 0.79 ppm scale-factor nonlinearity whole-angle microshell gyroscope realized by real-time calibration of capacitive displacement detection显示文摘Whole-angle gyroscopes have broad prospects for development with inherent advantages of excellent scale factor,wide bandwidth and measurement range,which are restrictions on rate gyroscopes.Previous studies on the whole-angle mode are based mostly on the linear model of Lynch,and the essential nonlinearity of capacitive displacement detection is always neglected,which has significant negative effects on the performance.In this paper,a novel realtime calibration method of capacitive displacement detection is proposed to eliminate these nonlinear effects.This novel method innovatively takes advantage of the relationship between the first and third harmonic components of detective signals for calibration.Based on this method,the real-time calibration of capacitive displacement detection is achieved and solves the problems of traditional methods,which are usually related to the vibration amplitude,environmental variations and other factors.Furthermore,this novel calibration method is embedded into a whole-angle control system to restore the linear capacitive response in real time and then combined with a microshell resonator for the first time to exploit the enormous potential of an ultrahigh Q factor and symmetric structure.The effectiveness is proven because the angle drift is reduced significantly to improve the scale-factor nonlinearity by 14 times to 0.79 ppm with 0.0673/h bias instability and a 0.0017s rate threshold,which is the best reported performance of the MEMS whole-angle gyroscope thus far.More importantly,this novel calibration method can be applied for all kinds of resonators with the requirement of a linear capacitive response even under a large resonant amplitude. | Jiangkun Sun Sheng Yu Yongmeng Zhang Qingsong Li Xiang Xi Kun Lu Xuezhong Wu Dingbang Xiao | 2021 | Microsystems & Nanoengineering2021，7，5： | 1 |
| 12 | Building attack scenarios through integration of complementary alert correlation methods显示文摘 | Ning Peng Xu Dingbang Christopher G Healey | 2004 | 11th Annual Network and Distributed System Security Symposium(NDSS''04)2004，，： | 1 |
| 13 | Hypothesizing and Reasoning about Attacks Missed by Intrusion Detection Systems显示文摘 | Peng Ning Dingbang Xu | 2004 | ACM Transactions on Information and System Security(S1094-9224)2004，7，4： | 1 |
| 14 | Performance of RAP in the system of cold in-place recycling of asphalt pavement显示文摘 | MA Baoguo WANG Haifeng WEI Dingbang | | 0，，： | 1 |
| 15 | Tech- niques and tools for analyzing intrusion alerts显示文摘 | Peng Ning Yun Cui Douglas S Reeves DingBang Xu | 2004 | ACM Trans- actions on Information and System Security2004，7，2： | 1 |
| 16 | Transition interface for improving the temperature charac- teristics of micro machined gyroscopes显示文摘 | HOU Zhanqiang WU Xuezhong XIAO Dingbang | 2014 | Micro system Technologies2014，20，2： | 1 |
| 17 | Hydrothennal synthesis and characterization of a new 1 - D polymeric lanthanum ethylene diaminetetmacetate with less metal-aqua coordination: {2}n显示文摘 | Xiong Dingbang Chen Haohong Yang Xinxin | 2007 | Inorg China Acta2007，360，： | 1 |
| 18 | Protected Fair Secret Sharing Based Bivariate Asymmetric Polynomials in Satellite Network显示文摘Verifiable secret sharing mainly solves the cheating behavior between malicious participants and the ground control center in the satellite network.The verification stage can verify the effectiveness of secret shares issued by the ground control center to each participant and verify the effectiveness of secret shares shown by participants.We use a lot of difficult assumptions based on mathematical problems in the verification stage,such as solving the difficult problem of the discrete logarithm,large integer prime factorization,and so on.Compared with other verifiable secret sharing schemes designed for difficult problems under the same security,the verifiable secret sharing scheme based on the Elliptic Curve Cryptography(ECC)system has the advantages of less computational overhead and shorter key.At present,the binary polynomial is a single secret scheme and cannot provide effective verification.Therefore,based on a Protected Verifiable Synchronous Multi Secret Sharing(PVS-MSS)scheme,this paper is designed based on bivariate asymmetric polynomials.The advanced verifiable attribute is introduced into the Protected Secret Sharing(PSS)scheme.This paper extends the protected synchronous multi-secret sharing scheme based on bivariate polynomial design.The ECC system constructs the security channel between the ground control center and participants and constructs the verification algorithm.Through the verification algorithm,any participant can verify the consistency and effectiveness of the secret shadow and secret share received from other participants or presented by the secret distribution center.Therefore,no additional key agreement protocol is required;participants do not need to negotiate the session key for encryption;the secret share polynomial can generate the session key between participants and speed up the secret reconstruction process.The verification stage has lower computational complexity than the verifiable scheme constructed by Rivest Shamir Adleman (RSA) and other encryption methods. Chinese Remainder Theorem (CRT)is used to update the secret shadow. The secret shadow does not need to beupdated with the change of the scheme shared secret, and the public valueupdate efficiency is higher. Reduce the complexity of sharing secret updatesin a synchronous multi-secret sharing scheme. | Yanyan Han Jiangping Yu Guangyu Hu Chenglei Pan Dingbang Xie Chao Guo Abdul Waheed | 2022 | Computers, Materials & Continua2022，，9： | 0 |
| 19 | POLYNOMIALLY BOUNDED COSINE FUNCTIONS显示文摘We characterize polynomial growth of cosine functions in terms of the resolvent of its generator and give a necessary and sufficient condition for a cosine function with an infinitesimal generator which is polynomially bounded. | Dingbang Cang Xiaoqiu Song Chen Cang | 2012 | Analysis in Theory and Applications2012，28，1： | 0 |
| 20 | Transmission Control under Multi-Service Disciplines in Wireless Sensor Networks显示文摘The wireless sensor network(WSN),as the terminal data acquisition system of the 5G network,has attracted attention due to advantages such as low cost and easy deployment.Its development is mainly restricted by energy.The traditional transmission control scheme is not suitable for WSNs due to the significant information interaction.A switchable transmission control scheme for WSNs based on a queuing game(SQGTC)is proposed to improve network performance.Considering that sensor nodes compete for the resources of sink nodes to realize data transmission,the competitive relationship between nodes is described from the perspective of a game.Different types of sensor node requests require a sink node to provide different service disciplines.Mathematical models of social welfare are established for a sink node under the service disciplines of first-come,first-served(FCFS),egalitarian processor sharing(EPS),and shortest service first(SSF).The optimal service strategies are obtained by maximizing social welfare.The sensor nodes provide the expected benefits and satisfy the service requirements of the requests,and the sink node switches the transmission control strategy for the service.Simulation results show that the proposed scheme improves the data transmission efficiency of WSNs and achieves the optimal allocation of resources. | Cheng Gong Dingbang Xie Chao Guo Sonia Kherbachi | 2021 | Computers, Materials & Continua2021，，8： | 0 |
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