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Privacy-preserving Decentralized Deep Learning with Multiparty Homomorphic Encryption [article]

Guowen Xu, Guanlin Li, Shangwei Guo, Tianwei Zhang, Hongwei Li
2022 arXiv   pre-print
Xu, Guanlin Li, and Tianwei Zhang are with the School of Computer Science and Engineering, Nanyang Technological University.  ...  approaches and datasets (unit: MB) Dataset Model Gradients-sharing Aggregation Total MNIST COPML D 2 -MHE 674 18.9 33.7 37.8 707.7 56.7 CIFAR-10 COPML D 2 -MHE 3235 90.72 161.76 181.44 3396.76 272.16 Guowen  ... 
arXiv:2207.04604v1 fatcat:rg2muodkwzcu5m5jmasoxhk6de

The Poor Relation

Li Guowen, Zhu Hong
1994 Iowa Review : literary quarterly  
a new star on the literary horizon of X province. For the last few days, he has lost his appetite, and at night, he tosses about in bed, unable to sleep. The fact is, poor Mr. H. is suffering from writer's block. Everybody knows that H. made a name for himself on rural themes. The virgin work which brought him fame and recognition was based on the story of his poor cousin in his home village. Her list of misfortunes, her tears, her courage and forbearance amidst poverty and hardship had wrung
more » ... e hearts of countless readers. Lately rural themes are back in vogue, but H. is silent. For some inexplicable reason, his fountain of inspiration has gone dry. Whenever he takes up his pen, his poor cousin and the bleak life of those bygone times come back to haunt him. So out of keeping with the current vogue of rural rags-to-riches stories. So frustrating. Of course H. strives to maintain a dignified silence. But to remain in the shade when so many new works are out in the sun is more than he can bear. H. is despondent. Can he turn out nothing but sketches of his poor cousin? The impression she left on his mind was too deep, to the exclusion of everything else. In that remote poverty-stricken mountain village, cash is so rare that many families cannot even afford matting for their brick beds. And yet his cousin always managed to save something for him, a spark of tenderness which warmed his forlorn heart. Thus his style was formed, a touch of tenderness, slightly tinged with pathos. But this style is no longer to modern tastes.
doi:10.17077/0021-065x.4775 fatcat:d5jhb3x7ynfhpnhodawqcaxire

ShiftNAS: Towards Automatic Generation of Advanced Mulitplication-Less Neural Networks [article]

Xiaoxuan Lou, Guowen Xu, Kangjie Chen, Guanlin Li, Jiwei Li, Tianwei Zhang
2022 arXiv   pre-print
Multiplication-less neural networks significantly reduce the time and energy cost on the hardware platform, as the compute-intensive multiplications are replaced with lightweight bit-shift operations. However, existing bit-shift networks are all directly transferred from state-of-the-art convolutional neural networks (CNNs), which lead to non-negligible accuracy drop or even failure of model convergence. To combat this, we propose ShiftNAS, the first framework tailoring Neural Architecture
more » ... h (NAS) to substantially reduce the accuracy gap between bit-shift neural networks and their real-valued counterparts. Specifically, we pioneer dragging NAS into a shift-oriented search space and endow it with the robust topology-related search strategy and custom regularization and stabilization. As a result, our ShiftNAS breaks through the incompatibility of traditional NAS methods for bit-shift neural networks and achieves more desirable performance in terms of accuracy and convergence. Extensive experiments demonstrate that ShiftNAS sets a new state-of-the-art for bit-shift neural networks, where the accuracy increases (1.69-8.07)% on CIFAR10, (5.71-18.09)% on CIFAR100 and (4.36-67.07)% on ImageNet, especially when many conventional CNNs fail to converge on ImageNet with bit-shift weights.
arXiv:2204.05113v1 fatcat:hgp3zay7djezpis7olosay363u

Watt-level high-power passively Q-switched laser based on a black phosphorus solution saturable absorber

Xi Wang Xi Wang, Zhenfu Wang Zhenfu Wang, Yonggang Wang Yonggang Wang, Lu Li Lu Li, Guowen Yang Guowen Yang, and Jinping Li and Jinping Li
2017 Chinese Optics Letters (COL)  
A novel black phosphorus (BP) solution saturable absorber (SA) is fabricated by the liquid-phase-exfoliated method and successfully used for passively Q-switched (QS) Nd:YVO 4 laser. Compared with a traditional solid SA, a BP solution SA possesses more excellent optical transparency and higher damage resistance. The shortest pulse duration and highest average output power are measured to be 119 ns and 1.23 W, respectively. To the best of our knowledge, both of them are the best results among QS
more » ... solid-state lasers with BP-based absorbers so far. The repetition rate is in the range of 533.2 to 722 kHz. The results indicate the potential application of the BP solution SA into high-power solid-state pulse lasers.
doi:10.3788/col201715.011402 fatcat:gziysotfuzaqdcy4qlaifw3vlu

Tourism companies' risk exposures on text disclosure

Jianping Li, Yuyao Feng, Guowen Li, Xiaolei Sun
2020 Annals of Tourism Research  
Li, et al.  ...  ., 2014; Wei, Li, Li, & Zhu (2019) ; Wei et al., 2019c) .  ... 
doi:10.1016/j.annals.2020.102986 pmid:32834224 pmcid:PMC7324118 fatcat:ucdut4x35zg7feujq2w26y5zma

SIMC 2.0: Improved Secure ML Inference Against Malicious Clients [article]

Guowen Xu, Xingshuo Han, Tianwei Zhang, Hongwei Li, Robert H.Deng
2022 arXiv   pre-print
In this paper, we study the problem of secure ML inference against a malicious client and a semi-trusted server such that the client only learns the inference output while the server learns nothing. This problem is first formulated by Lehmkuhl et al. with a solution (MUSE, Usenix Security'21), whose performance is then substantially improved by Chandran et al.'s work (SIMC, USENIX Security'22). However, there still exists a nontrivial gap in these efforts towards practicality, giving the
more » ... ges of overhead reduction and secure inference acceleration in an all-round way. We propose SIMC 2.0, which complies with the underlying structure of SIMC, but significantly optimizes both the linear and non-linear layers of the model. Specifically, (1) we design a new coding method for homomorphic parallel computation between matrices and vectors. It is custom-built through the insight into the complementarity between cryptographic primitives in SIMC. As a result, it can minimize the number of rotation operations incurred in the calculation process, which is very computationally expensive compared to other homomorphic operations e.g., addition, multiplication). (2) We reduce the size of the garbled circuit (GC) (used to calculate nonlinear activation functions, e.g., ReLU) in SIMC by about two thirds. Then, we design an alternative lightweight protocol to perform tasks that are originally allocated to the expensive GCs. Compared with SIMC, our experiments show that SIMC 2.0 achieves a significant speedup by up to 17.4× for linear layer computation, and at least 1.3× reduction of both the computation and communication overheads in the implementation of non-linear layers under different data dimensions. Meanwhile, SIMC 2.0 demonstrates an encouraging runtime boost by 2.3∼ 4.3× over SIMC on different state-of-the-art ML models.
arXiv:2207.04637v1 fatcat:mtrbixkzgfg2tkcnthmxyvx2n4

Developing AMS measurement of ^59Ni at CIAE [article]

He Ming, Wang Wei, Ruan Xiangdong, Li Chaoli, Dong Kejun, Du liang, Xie Lin Bo, Li Zhenyu, Zhen Guowen, Hu Hao, Liu J
2013 arXiv   pre-print
Accelerator mass spectrometry (AMS) measurement of ^59Ni has been established at CIAE with the HI-13 tandem accelerator and the recently developed Δ E-Q3D detection system. ^59Ni standard and commercial NiO samples were measured to check the performance of the Δ E-Q3D detection system on ^59Ni isobar separation and suppression. An overall suppression factor of about 10^7 for the interfering isobar ^59Co resulting in detection sensitivity as low as 3.8× 10^-13 atomic ratio (^59Ni/Ni) has been
more » ... ained. Based on these techniques, the AMS measurement method of ^59Ni with high sensitivity is developed.
arXiv:1304.3188v1 fatcat:lgqwti64bbh57crmnn6ah22v4u

Stress Measurement of Steel Strands Based on System Identification Method

Ji Qian, Jianbin Li, Changchun Li, Jianting Zhou, Guowen Yao
2019 Shock and Vibration  
Steel strands are crucial components of a prestressed structure, but their performance degrades inevitably with time. Among the existing nondestructive testing methods for measuring the stress state of steel strands, ultrasonic guided wave methods have received the most research attention and are most likely to be applied to actual engineering. This work views the propagation of ultrasonic guided wave as an individual system, and the variations in the stress state in steel strands can be
more » ... to the parameters gained by the system identification model. The finite element simulation and experimental results show the propagation characteristics of the guided wave are influenced distinctly by the stress state. The index constructed by the system parameters exhibits good monotonic linear with stress level variation, and the slope of the fitted line from experimental data is similar to the simulation result. The sensor placement and loading path have a limited effect on the stress state and the proposed index.
doi:10.1155/2019/5653902 fatcat:r452bbpodfb2bpvqyliid3axbq

Knockdown of PNO1 inhibits esophageal cancer progression

Guowen Wang, Qicai Li, Chuankui Li, Guixin Duan, Haiwei Sang, Haijun Dong, Yifan Yang, Chang Ma, Tao Tao
2021 Oncology Reports  
The present study aimed to investigate the role of partner of NOB1 homolog (PNO1) in esophageal cancer (EC). The expression levels of PNO1 in EC were primarily analyzed using data obtained from databases. PNO1 expression was also knocked down in EC cells (Eca‑109 and TE1) to determine the biological effects of PNO1 on tumorigenesis in vitro and in vivo. In addition, possible downstream targets of PNO1 in EC were identified. The expression levels of PNO1 were upregulated in the tumor tissues
more » ... ared with that noted in normal tissues. Moreover, the knockdown (KD) of PNO1 suppressed cell proliferation, migration and invasion, and promoted cell apoptosis (P < 0.05). Furthermore, the protein expression levels of AKT1, Twist, Myc, mTOR, matrix metalloproteinase 2 (MMP2), nuclear factor (NF)‑κB p65 and β‑catenin 1 (CTNNB1) were downregulated following the KD of PNO1 in Eca‑109 cells (P < 0.05). In addition, the overexpression of CTNNB1 reversed the effects of PNO1 KD in Eca‑109 cells (P < 0.05). In conclusion, the findings of the present study suggest that PNO1 promotes EC progression by regulating AKT1, Twist, Myc, mTOR, MMP2, NF‑κB p65 and CTNNB1 expression.
doi:10.3892/or.2021.8036 pmid:33864661 pmcid:PMC8025143 fatcat:jiudr57ml5byzpokuq7appvvai

Recent Progresses on Mitochondria-Targetable Fluorescent Probes

Yangjie Li, Ziqi Lü, Min Liu, Guowen Xing
2016 Youji huaxue  
Over the past few years, many bifunctional fluorescent probes based on small organic molecules, which can be located on the mitochondria to detect specific reactive small molecules (RSMs), including reactive oxygen species, reducing species, metal ions, proton and small anions, have been reported to be successful in achieving visual imaging in mitochondria. For further detection and imaging of the reactive small molecules in tissue, the design and synthesis of two-photon fluorescent probes and
more » ... ear-infrared fluorescent probes bearing good optical properties become increasingly popular. The recently reported mitochondrial fluorescent probes are classified, summarized and reviewed. The bright prospects of these probes in the application of preliminary diagnosis and therapy of some diseases are also discussed.
doi:10.6023/cjoc201510012 fatcat:eze5234tmzamxhppcdgmmgvwii

Publicly Verifiable Secret Sharing Member-join Protocol For Threshold Signatures

Jia Yu, Fanyu Kong, Rong Hao, Xuliang Li, Guowen Li
2008 Journal of Communications  
Publicly verifiable secret sharing (PVSS) allows not only shareholders themselves but also everyone verify the shares of a secret distributed by a dealer. It has a lot of electronic applications. In this paper, we propose a publicly verifiable member-join protocol for threshold signatures. In our proposal, a new member can join a PVSS scheme to share the secret only with the help of old shareholders. What's more, everyone besides the new member can verify the validity of the new member's share,
more » ... while only the new member knows his share. Different from previous protocols, our protocol can tolerate a mobile adversary. This proposal adapts to many electronic applications. Finally, we analyze the security of our scheme. Index Terms-verifiable secret sharing, publicly verifiable secret sharing, verifiable secret redistribution, verifiable encryption I.
doi:10.4304/jcm.3.7.36-43 fatcat:q4d74cylsbaw5k2mno5no2cu5a

A high-precision underwater object detection based on joint self-supervised deblurring and improved spatial transformer network [article]

Xiuyuan Li, Fengchao Li, Jiangang Yu, Guowen An
2022 arXiv   pre-print
Li et al [44] treated underwater image synthesis as an image-to-image translation task and exploited a single GAN to synthesize underwater images from in-air RGB-D images.  ... 
arXiv:2203.04822v1 fatcat:6ry3lpxd5jbj5l4l2vy3bb3wdm

Mechanism of photosynthetic response in Microcystis aeruginosa PCC7806 to low inorganic phosphorus

Zhicong Wang, Dunhai Li, Guowen Li, Yongding Liu
2010 Harmful Algae  
Illumination of 500 mmol photons m À2 s À1 was provided by a halogen lamp, which was measured with a quantum sensor (LI-185B, Li-Cor Inc., USA).  ... 
doi:10.1016/j.hal.2010.04.012 fatcat:p66ghd6gizgs5enmp4yynf32me

Forward-Secure Multisignature, Threshold Signature and Blind Signature Schemes

Jia Yu, Fanyu Kong, Xiangguo Cheng, Rong Hao, Yangkui Chen, Xuliang Li, Guowen Li
2010 Journal of Networks  
Forward-secure signatures are proposed to tackle the key exposure problem, in which the security of all signatures prior to key leakage is still kept even if the secret key leaks. In this paper, we construct two forward-secure multisignature schemes, one forward-secure threshold signature scheme, and one forward-secure blind signature scheme. Our constructions are based on the recently proposed forward-secure signature scheme from bilinear maps in [11] . Our constructions are very efficient and
more » ... useful thanks to the elegant structure of the base scheme. Such schemes play an important role in many electronic applications such as cryptographic election systems, digital cash schemes, and e-cheques.
doi:10.4304/jnw.5.6.634-641 fatcat:jy2hnimplbgxtbxa6ayts3pegi

Preparation and Properties of Amphiphilic Polymer Nanospheres Containing Aza-crown ether

Yujian Zhang, Bin Xie, Liyang Zhang, Li Ma, Shuyan He, Guowen Li
2012 Huaxue xuebao  
a 中国石油大庆化工研究中心 大庆 163714) ( b 吉林大学超分子材料与结构国家重点实验室 长春 130012) 摘要 设计、合成了含氮杂冠醚和腺嘌呤的双亲聚合物, 聚[N,N-二乙氧基-1,10-二氮杂-18 冠-6-5-甲基-腺嘌呤-异酞酸 酯] (PCASE). SEM 观测到在水溶液中该聚合物与 5-氟尿嘧啶(5-flu)小分子识别后自发聚集成直径约 140~210 nm 的纳 米球, 用动态光散射测得水溶液中 PCASE/5-flu 纳米球的粒径主要集中在 120~230 nm 范围内, FTIR 研究了 PCASE/ 5-flu 纳米球内聚合物 PCASE 中腺嘌呤与底物 5-氟尿嘧啶的分子识别, 结果表明, 识别后 5-氟尿嘧啶环上 C(2)=O 伸 缩振动峰从 1724 cm -1 位移至 1718 cm Abstract An amphiphilic polymer containing adenine and aza-crown ethers,
more » ... ne-(1-adenine)]sophthaloyl ester} (PCASE), was synthesized. The SEM morphology observed indicates that the amphiphilic PCASE polymer self-organized into diameters of about 140~210 nm nanospheres in dilute aqueous solution after recognized with 5-fluorouracil spontaneously. The sizes of PCASE/5-flu nanospheres in dilute aqueous solution determined by dynamic light scattering (DLS) are mainly dispersed at 120~230 nm. The molecule recognition based on hydrogen bond between adenine of polymer and 5-fluorouracil substrate in PCASE/5-flu nanospheres was studied. After recognition the C(2)=O stretching vibration at 1724 cm -1 of 5-fluorouracil subtract shifted to 1718 cm -1 , the NH 2 stretching vibration at 3324 cm -1 disappeared, and a new peak at 3432 cm -1 arised, indicating the formation of hydrogen bonds between 5-fluorouracil and adenine in polymer PCASE. The study on variable temperature FTIR show that the peak 1718 cm -1 gradually shifted back to the position at 1724 cm -1 , and the new peak 3432 cm -1 disappeared finally, indicating that the H-bond was broken.
doi:10.6023/a1105167 fatcat:raujzpaqhncefonmozybm62xli
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