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| 1 | Porous Graphene Microflowers for High-Performance Microwave Absorption显示文摘Graphene has shown great potential in microwave absorption(MA) owing to its high surface area, low density,tunable electrical conductivity and good chemical stability.To fully realize graphenes& MA ability, the microstructure of graphene should be carefully addressed. Here we prepared graphene microflowers(Gmfs) with highly porous structure for high-performance MA filler material. The efficient absorption bandwidth(reflection loss B-10 dB) reaches 5.59 GHz and the minimum reflection loss is up to -42.9 dB, showing significant increment compared with stacked graphene. Such performance is higher than most graphene-based materials in the literature. Besides, the low filling content(10 wt%) and low density(40–50 mg cm^(-3))are beneficial for the practical applications. Without compounding with magnetic materials or conductive polymers,Gmfs show outstanding MA performance with the aid of rational microstructure design. Furthermore, Gmfs exhibit advantages in facile processibility and large-scale production compared with other porous graphene materials including aerogels and foams. | Chen Chen Jiabin Xi Erzhen Zhou Li Peng Zichen Chen Chao Gao | 2018 | Nano-Micro Letters2018，10，2： | 20 |
| 2 | Attack on Libert et al.'s ID-Based Undeniable Signature Scheme显示文摘 | LI Zichen YAN Yunsheng ZHANG Juanmei | 2008 | Chinese Journal of Electronics2008，17，4： | 7 |
| 3 | Targeted Fully Homomorphic Encryption Based on a Double Decryption Algorithm for Polynomials显示文摘Several public-key encryption schemes used to solve the problem of ciphertext data processing on the fly are discussed.A new targeted fully homomorphic encryption scheme based on the discrete logarithm problem is presented.Public-key encryption cryptosystems are classified to examine homomorphic encryption.Without employing techniques proposed by Gentry such as somewhat homomorphic and bootstrapping techniques,or relinearization technique proposed by Brakerski et al.,a new method called'Double Decryption Algorithm'is employed in our cryptography to satisfy a fully or targeted fully homomorphic property.Inspired by ElGamal and BGN cryptography,we obtain the desired fully homomorphic property by selecting a new group and adding an extra component to the ciphertext.Proof of semantic security is also demonstrated. | Yatao Yang Shuang Zhang Junming Yang Jia Li Zichen Li | 2014 | Tsinghua Science and Technology2014，19，5： | 6 |
| 4 | NON-CONTACT MEASUREMENT SYSTEM OF FREEFORM SURFACE AND NURBS RECONSTRUCTION OF MEASUREMENT POINTS显示文摘Based on the development of the non-contact measurement system of free-form surface, NURBS reconstruc-tion of measurement points of freeform surface is effectively realized by modifying the objective function and recursiveprocedure and calculating the optimum number of control points. The reconstruction precision is evaluated through Ja-cobi's transformation method. The feasibility of the measurement system and effectiveness of the reconstruction algo-rithm above are proved by experiment. | Li Jian Wang Wen Chen Zichen Institute of Advanced Manufacturing Engineering, Zhejiang University, Hangzhou 310027, China | 2002 | Chinese Journal of Mechanical Engineering2002，15，4： | 4 |
| 5 | NeuroBiometric:An Eye Blink Based Biometric Authentication System Using an Event-Based Neuromorphic Vision Sensor显示文摘The rise of the Internet and identity authentication systems has brought convenience to people's lives but has also introduced the potential risk of privacy leaks.Existing biometric authentication systems based on explicit and static features bear the risk of being attacked by mimicked data.This work proposes a highly efficient biometric authentication system based on transient eye blink signals that are precisely captured by a neuromorphic vision sensor with microsecond-level temporal resolution.The neuromorphic vision sensor only transmits the local pixel-level changes induced by the eye blinks when they occur,which leads to advantageous characteristics such as an ultra-low latency response.We first propose a set of effective biometric features describing the motion,speed,energy and frequency signal of eye blinks based on the microsecond temporal resolution of event densities.We then train the ensemble model and non-ensemble model with our Neuro Biometric dataset for biometrics authentication.The experiments show that our system is able to identify and verify the subjects with the ensemble model at an accuracy of 0.948 and with the non-ensemble model at an accuracy of 0.925.The low false positive rates(about 0.002)and the highly dynamic features are not only hard to reproduce but also avoid recording visible characteristics of a user's appearance.The proposed system sheds light on a new path towards safer authentication using neuromorphic vision sensors. | Guang Chen Fa Wang Xiaoding Yuan Zhijun Li Zichen Liang Alois Knoll | 2021 | IEEE/CAA Journal of Automatica Sinica2021，8，1： | 3 |
| 6 | CNC NON-CONTACT MEASURING SYSTEM FOR FREEFORM SURFACE显示文摘Developing CNC measuring method on the base of coordinate machine can make the best of the hardware resource of CNC system and realize the integration of CAD/CAM/CAT. Based on the evenly spaced parallel planes scanning, a new adaptive digitizing approach for freeform surface namely arc length extrapolation is put forward. By this way, the digitizing approach can be added to the CNC system, while the system's hardware and software are not changed. | JuHua Wang Wen Chen Zichen Li Jian Wang Hengkui Institute of Production Engineering, Zhejiang University, Hangzhou 310027, China | 2002 | Chinese Journal of Mechanical Engineering2002，15，2： | 3 |
| 7 | A Novel Direct Anonymous Attestation Protocol Based on Zero Knowledge Proof for Different Trusted Domains显示文摘In order to solve the issue that existing direct anonymous attestation (DAA) scheme can not operate effectively in different domains,based on the original DAA scheme,a novel direct anonymous attestation protocol used in multi domains environment is proposed and designed,in which,the certificate issuer located in outside of domain can be considered as a proxy server to issue the DAA certificate for valid member nodes directly.Our designed mechanism accords with present trusted computing group (TCG) international specification,and can solve the problems of practical authentication and privacy information protection between different trusted domains efficiently.Compared with present DAA scheme,in our protocol,the anonymity,unforgeability can be guaranteed,and the replay-attack also can be avoided.It has important referenced and practical application value in trusted computing field. | YANG Yatao CAO Lulin LI Zichen | 2010 | China Communications2010，7，4： | 3 |
| 8 | High Quality Data Hiding in Halftone Image Based on Block Conjugate显示文摘This paper proposes a High quality data hiding in halftone image based on block conjugate(HQDHBC). We construct Least mean square filters(LMSF),and using LMSFs to evaluate the quality of halftone images. This paper proposes block conjugate property, and this property can be applied to hide a secret pattern.Therefore a data hiding method based on block conjugate can be proposed, and in this method two images should be divided into multiple blocks of M × N pixels, and in the corresponding block if the first M × N-1 pixels are conjugate or identical, the last pixel can implement normal halftone method instead of date hiding methods. Experimental results show that the proposed HQDHBC can be applied in gray-scale and color error diffused halftone images, and through implementing this method, not only the quality of halftone images can be improved, but also the Correct decoding rate(CDR) of revealed pattern can be guaranteed. | DING Haiyang LI Zichen YANG Yixian YOU Fucheng LIU Fuping | 2018 | Chinese Journal of Electronics2018，27，1： | 3 |
| 9 | A novel mesoporous lignin/silica hybrid from rice husk produced by a sol–gel method显示文摘 | Yuning Qu Yumei Tian Bo Zou Jian Zhang Yunhui Zheng Lili Wang Ying Li Chunguang Rong Zichen Wang | 2010 | Bioresource Technology2010，，21： | 1 |
| 10 | Application studies of activated carbon derived from rice husks produced by chemical-thermal process—A review显示文摘 | Yue Chen Yanchao Zhu Zichen Wang Ying Li Lili Wang Lili Ding Xiaoyan Gao Yuejia Ma Yupeng Guo | 2010 | Advances in Colloid and Interface Science2010，，1： | 1 |
| 11 | Chinese automobile manufacturing mass customization production pattern research 显示文摘 | GU Xinjian CHEN Zichen XIONG Li | 2002 | China Industrial Economy2002，，6： | 1 |
| 12 | (k, n) halftone visual cryptography based on Shamir' s secret sharing显示文摘(k,n) halftone visual cryptography( HVC) is proposed based on Shamir's secret sharing( HVCSSS),and through this method a binary secret image can be hided into n halftone images,and the secret image can be revealed from any k halftone images. Firstly,using Shamir's secret sharing,a binary secret image can be shared into n meaningless shares; secondly,hiding n shares into n halftone images through self-hiding method; and then n extracted shares can be obtained from n halftone images through self-decrypt method; finally,picking any k shares from n extracted shares,the secret image can be revealed by using Lagrange interpolation. The main contribution is that applying Shamir's secret sharing to realize a(k,n) HVC,and this method neither requires code book nor suffers from pixel expansion. Experimental results show HVCSSS can realize a(k,n) HVC in gray-scale and color halftone images,and correct decoding rate( CDR) of revealed secret image can be guaranteed. | Ding Haiyang Li Zichen Bi Wei | 2018 | The Journal of China Universities of Posts and Telecommunications2018，25，2： | 1 |
| 13 | Projected Runge-Kutta methods for constrained Hamiltonian systems显示文摘Projected Runge-Kutta(R-K) methods for constrained Hamiltonian systems are proposed.Dynamic equations of the systems,which are index-3 differential-algebraic equations(DAEs) in the Heisenberg form,are established under the framework of Lagrangian multipliers.R-K methods combined with the technique of projections are then used to solve the DAEs.The basic idea of projections is to eliminate the constraint violations at the position,velocity,and acceleration levels,and to preserve the total energy of constrained Hamiltonian systems by correcting variables of the position,velocity,acceleration,and energy.Numerical results confirm the validity and show the high precision of the proposed method in preserving three levels of constraints and total energy compared with results reported in the literature. | Yi WEI Zichen DENG Qingjun LI Bo WANG | 2016 | Applied Mathematics and Mechanics(English Edition)2016，37，8： | 1 |
| 14 | Glucose-sensitive aggregates formed by poly (ethylene oxide)-block- poly(2-glucosyl-oxyethyl acrylate) with coneanavalin a in dilute aqueous medium显示文摘 | You Liangchen Lu Fengzhu Li Zichen | 2003 | Macromolecules2003，36，： | 1 |
| 15 | Targeted minicircle DNA delivery using folate–poly(ethylene glycol)–polyethylenimine as non-viral carrier显示文摘 | Chao Zhang Shijuan Gao Wei Jiang Song Lin Fusheng Du Zichen Li Wenlin Huang | 2010 | Biomaterials2010，，23： | 1 |
| 16 | Geological significance of the former Xiong'er Volcanic Belt on the southwestern margin of the North China Craton显示文摘The rock association of low-grade metasedimentary rocks and greenschists located within the Meso- Cenozoic Liupanshan Fault system on the southwestern margin of the North China Craton (NCC)is regarded as part of the Paleoproterozoic Xiong'er Group.These low- grade rocks are separated by normal faults,with the greenschist located in the hanging wails.Zircon LA-ICP- MS U-Pb ages of the greenschists range from 2455 to 423 Ma,suggesting that they are not Paleoproterozoic in age. The protolith ages (206-194 Ma)of the greenschists were determined by LA-ICP-MS U-Pb dating of zircons from two siltstone inteflayers.The petrology and geochemistry of the greenschists reveal that their protolith was continental tholeiitic basalt that formed in an extensional environment such as a continental rift.Thus,it is proposed that the protolith of the greenschists was a mafic volcanic rock of Late Triassic-Early Jurassic age and was metamorphosed during the Jurassic due to tectonism within the Liupanshan tectonic belt.These results show that the greenschists should be reclassified and removed from the Xiong'er Group,and explains why they differ so much from those of typical Xiong'er Group successions in other areas.The formation of the mafic volcanic rocks under conditions of continental rifting differs from that of coeval granitic rocks in the western Qinling Orogen,where the extension occurred during a post-collisional stage in the Late Triassic,which further suggests that the southwestern margin of the NCC became an extensional setting after the Late Triassic. | Guanxu CHEN Jinhai LUO Huan XU Jia YOU Yifei LI Zichen CHE | 2019 | Frontiers of Earth Science2019，13，1： | 1 |
| 17 | Pressureless two-step sintering of ultrafine-grained refractory metals:Tungsten-rhenium and molybdenum显示文摘The challenge of sintering ultrafine-grained refractory metals and alloys to full density is hereby addressed by pressureless two-step sintering in tungsten-rhenium alloy and pure molybdenum. Using properly processed nano powders(~50 nm average particle size), we are able to sinter W-10Re alloy to 98.4% density below 1200 ℃ while maintaining a fine grain size of 260 nm, and sinter molybdenum to 98.3% density below 1120 ℃ while maintaining a fine grain size of 290 nm. Compared to normal sintering,two-step sintering offers record-fine grain sizes and better microstructural uniformity, which translates to better mechanical properties with higher hardness(6.3 GPa for tungsten-rhenium and 4.0 GPa for molybdenum, both being the highest in all pressurelessly sintered samples of the respective material system)and larger Weibull modulus. Together with our previous demonstration in tungsten, we believe that twostep sintering is a general effective method to produce high-quality fine-grained refractory metals and alloys, and the lessons learned here are transferable to other materials for powder metallurgy. | Zhongyou Que Zichen Wei Xingyu Li Lin Zhang Yanhao Dong Mingli Qin Junjun Yang Xuanhui Qu Ju Li | 2022 | Journal of Materials Science & Technology2022，，31： | 1 |
| 18 | Bacteriophages in water pollution control:Advantages and limitations显示文摘Wastewater is a breeding ground for many pathogens,which may pose a threat to human health through various water transmission pathways.Therefore,a simple and effective method is urgently required to monitor and treat wastewater.As bacterial viruses,bacteriophages(phages)are the most widely distributed and abundant organisms in the biosphere.Owing to their capacity to specifically infect bacterial hosts,they have recently been used as novel tools in water pollution control.The purpose of this review is to summarize and evaluate the roles of phages in monitoring pathogens,tracking pollution sources,treating pathogenic bacteria,infecting bloom-forming cyanobacteria,and controlling bulking sludge and biofilm pollution in wastewater treatment systems.We also discuss the limitations of phage usage in water pollution control,including phage-mediated horizontal gene transfer,the evolution of bacterial resistance,and phage concentration decrease.This review provides an integrated outlook on the use of phages in water pollution control. | Mengzhi Ji Zichen Liu Kaili Sun Zhongfang Li Xiangyu Fan Qiang Li | 2021 | Frontiers of Environmental Science & Engineering2021，15，5： | 1 |
| 19 | Development and validation of a predictive model for endocervical curettage in patients referred for colposcopy:A multicenter retrospective diagnostic study in China显示文摘Objective:This study aimed to develop a nomogram that can predict occult high-grade squamous intraepithelial lesions or worse(HSIL+)and determine the need for endocervical curettage(ECC)in patients referred for colposcopy.Methods:This retrospective multicenter study included 4,149 patients who were referred to any one of six tertiary hospitals in China for colposcopy between January 2020 and November 2021 because of abnormal screening results.ECC data were extracted from the medical records.Univariate and multivariate logistic regression analyses were performed to identify factors that could predict HSIL+on ECC.Patients were randomly assigned to a training set or to an internal validation set for performance and comparability testing.The model was externally validated and tested in patients from two additional hospitals.The nomogram was assessed in terms of discrimination and calibration and subjected to decision curve analysis.Results:HSIL+was found on ECC in 38.8%(n=388)of cases.Our predictive nomogram included age group,cytology,human papillomavirus(HPV)status,visibility of the cervix and colposcopic impression.The nomogram had good overall discrimination,which was internally validated[area under the receiver-operator characteristic(AUC),0.839;95%confidence interval(95%CI),0.773-0.904].In terms of external validation,the AUC was 0.843(95%CI,0.773-0.912)for the consecutive sample and 0.843(95%CI,0.783-0.902)for the comparative sample.Calibration analysis suggested good consistency between predicted and observed probabilities.Decision curve analysis suggested this nomogram would be clinically useful with almost the entire range of threshold probabilities.Conclusions:This internally and externally validated nomogram can be easily applied and incorporates multiple clinically relevant variables that can be used to identify patients with occult HSIL+who need ECC. | Peng Xue Bingrui Wei Samuel Seery Qing Li Zichen Ye Yu Jiang Youlin Qiao | 2022 | Chinese Journal of Cancer Research2022，34，4： | 1 |
| 20 | Disease resistance conferred by components of essential chrysanthemum oil and the epigenetic regulation of OsTPS1显示文摘The sesquiterpene alpha-bisabolol is the predominant active ingredient in essential oils that are highly valued in the cosmetics industry due to its wound healing,anti-inflammatory,and skin-soothing properties.Alpha-bisabolol was thought to be restricted to Compositae plants.Here we reveal that alpha-bisabolol is also synthesized in rice,a non-Compositae plant,where it acts as a novel sesquiterpene phytoalexin.Overexpressing the gene responsible for the biosynthesis of alpha-bisabolol,Os TPS1,conferred bacterial blight resistance in rice.Phylogenomic analyses revealed that alpha-bisabolol-synthesizing enzymes in rice and Compositae evolved independently.Further experiments demonstrated that the natural variation in the disease resistance level was associated with differential transcription of Os TPS1 due to polymorphisms in its promoter.We demonstrated that Os TPS1 was regulated at the epigenetic level by JMJ705 through the methyl jasmonate pathway.These data reveal the cross-family accumulation and regulatory mechanisms of alpha-bisabolol production. | Chuansong Zhan Long Lei Hao Guo Shen Zhou Congping Xu Zixin Liu Zichen Wu Yuan Deng Yuanyuan Miao Yu Han Meng Zhang Hua Li Sishu Huang Chenkun Yang Feng Zhang Yufei Li Ling Liu Xianqing Liu Hafiz Muhammad Khalid Abbas Alisdair R.Fernie Meng Yuan Jie Luo | 2023 | Science China(Life Sciences)2023，66，5： | 1 |
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