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Science China Chemistry 2011年第10期54卷 1607-1614页

作者： liu ChunTing MA Ji liu yuliang College of Materials Science and Engineering Qingdao University of Science and Technology Qingdao 266061 China School of Materials Science and Engineering Henan University of Science and Technology Luoyang 471003 China

The spindle-like, tubular, and tire-like hematite were successively fabricated by a facile, one-step hydrothermal procedure, which is of great importance in facilitating the controllable-synthesis process of commercial industrialization. A mechanism involving a formation-dissolution process was proposed based on the X-ray diffraction, scanning electron microscopy, trans-mission electron microscopy, and high-resolution transmission electron microscopy analysis. It was demonstrated that the presence of phosphate ions during the reaction process is crucial to the morphology evolution of hematite. Their different ad-sorption ability on the different crystallographic planes of hematite and a coordination effect with ferric ions could promote the preferential dissolution of the spindle-like hematite precursors along the long axis [001] from the tips down to the interior, and thus yield the tubular and tire-like hematite one by one with the increasing reaction time. The magnetic measurements have also been performed to investigate the different magnetic properties such as coercivity and low-temperature transition behavior of three different hematite nanostructures.

关键词： hematite (-Fe2O3) hydrothermal synthesis nanospindle nanotube nanotire

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一种新型压配式腰椎椎间融合器的机械性能

中国组织工程研究 2025年第21期29卷 4492-4498页

作者：李世文于长水刘启王智博刘禹良祁全哈尔滨医科大学附属第一医院黑龙江省哈尔滨市150000

背景:行经皮微创椎间孔腰椎椎间融合置入椎间融合器时,由于入路操作范围狭窄,有牵拉神经根损伤或置入融合器位置不良等风险,为了解决以上问题作者课题组发明了一种新型机械结构可变形压配式cage(Press-fit cage,YP-cage)。目的:对新型... 详细信息

背景:行经皮微创椎间孔腰椎椎间融合置入椎间融合器时,由于入路操作范围狭窄,有牵拉神经根损伤或置入融合器位置不良等风险,为了解决以上问题作者课题组发明了一种新型机械结构可变形压配式cage(Press-fit cage,YP-cage)。目的:对新型腰椎融合器YP-cage的机械强度特性进行初步评估。方法:对不同尺寸9,11,13 mm高度的新型YP-cage(n=9)和聚醚醚酮-cage(n=9)进行了静态轴向压缩实验和静态轴向扭转实验,分别采集力-位移曲线计算屈服位移及载荷、极限载荷位移及刚度,屈服角位移及扭矩、极限载荷角位移扭矩及刚度,并进行对比分析。结果与结论:(1)在静态轴向压缩测试中,YP-cage在3组测试中(9,11,13 mm),其刚度、屈服载荷、极限位移和载荷极限方面均优于聚醚醚酮-cage(P <0.01),但YP-cage的屈服位移小于聚醚醚酮-cage(P <0.05);(2)在静态扭转测试中,除了9 mm组的YP-cage和聚醚醚酮-cage在极限扭转角度上差异无显著性意义,YP-cage在屈服扭矩、屈服扭转角度及极限扭矩均小于聚醚醚酮-cage(P <0.01),而YP-cage扭转刚度在9 mm组和11 mm组大于聚醚醚酮-ccage(P <0.01);(3)结果表明新型压配式机械结构椎间融合器相较于聚醚醚酮材质cage具有更高的抗压强度,但抗扭强度不如聚醚醚酮-cage。

关键词：椎间融合装置经孔椎体间融合术脊柱融合机械性能物理性质

Provably Secure Information Hiding via Short Text in Social Networking Tools

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Tsinghua Science and Technology 2012年第3期17卷 225-231页

作者： Wei Ren yuliang liu Junge Zhao School of Computer Science China University of GeosciencesWuhan 430074China Shandong Provincial Key Laboratory of Computer Networks Jinan 250014China Department of Information Security Naval University of EngineeringWuhan 430030China

Utilizing OnLine Short Text （OLST） in social networking tools such as microblogs, instant messag- ing platforms, and short message service via smart phones has become a routine in daily life. OLST is ap- pealing for personal covert communication because it can hide information in a very short carrier text, and this concealment is hard to detect due to the diversity of normal traffic. However, designing appropriate schemes confronts several challenges： they need to be provably secure, and their performance needs to maintain high efficiency and handy usability due to the short length of OLST messages. In this paper, we propose a family of customized schemes known as HiMix, HiCod, HiOpt, and HiPhs for text steganography in OLST. These schemes are evaluated in terms of their security and their performance with regard to two metrics that address the particular characteristics of OLST： hiding rate and hiding ease. All proposed schemes are proved to be at least computationally secure, and their performance in terms of hiding rate and hiding ease justifies their applicability in social networking tools that utilize OLST.

关键词： information hiding provable security text steganography covert communication

Optical wireless network in home area based on white LED lights

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High Technology Letters 2011年第3期17卷 277-284页

作者： Wang Rui Duan Jingyuan Shi Ancun liu yuliang Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 P. R. China

A new optical wireless network based on white LED lights in home area is proposed. It is a duplex channel communication system utilizing signal emitters of white LED lights in the downlink and infrared devices in the uplink. Strategies for the system construction are given. Performance for users＇ mobile access of different kinds of optical concentrators is investigated. Indoor channel band-width is analyzed considering white LED light distribution, wall reflection, and receivers field of view （FOV）. Various modulation methods are discussed. A demo point-to-point system for surfing the net is constructed using a new line code of 4B6B which is developed to stabilize the optical output, and a peak data rate of 1 Mbps is achieved. This system is built into the lighting infrastructure, therefore decreasing the cost and offering a solution for wireless access in places which are sensitive to radio frequency like hospitals.

关键词： optical wireless network white LED light optical concentrator mobile access indoor channel bandwidth

A Novel Thermally Coupled Reactive Distillation Column for the Hydrolysis of Methyl Acetate

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China Petroleum Processing & Petrochemical Technology 2015年第2期17卷 101-108页

作者： Zhai Jian liu yuliang Sun Lanyi Wang Rujun State Key Laboratory of Heavy Oil Processing China University of Petroleum China Petroleum Engineering Co. Ltd.Beijing Company

A different pressure thermally coupled reactive distillation column(DPT-RD) for the hydrolysis of methyl acetate(Me Ac) is developed, and its design and optimization procedures are investigated. The sensitivity analysis is carried out to minimize the energy consumption, which is associated with the total annual cost(TAC). The influence of the proposed DPTRD scheme on energy consumption and economic efficiency are evaluated in comparison with the conventional reactive distillation column(CRD). Both the DPT-RD and CRD are simulated with the Aspen Plus?, and it can be observed that for the DPT-RD the energy consumption and the TAC are reduced, and the thermodynamic efficiency is increased as compared with the CRD process.

关键词： different pressure thermally coupled distillation reactive distillation thermodynamic efficiency energy savings total annual cost

Image Processing of Manganese Nodules Based on Background Gray Value Calculation

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Computers, Materials & Continua 2020年第10期65卷 511-527页

作者： Hade Mao yuliang liu Hongzhe Yan Cheng Qian Jing Xue School of Naval Architecture and Mechanical Engineering Zhejiang Ocean UniversityZhoushan316004China Key Laboratory of Submarine Geoscience Second Institute of OceanographyState Oceanic AdministrationHangzhou310012China School of Physics and Electrical Engineering Huaiyin Normal UniversityHuai’an223300China Faculty of Business and Law Deakin UniversityBurwoodVIC 3125Australia

To troubleshoot two problems arising from the segmentation of manganese nodule images-uneven illumination and morphological defects caused by white sand coverage,we propose,with reference to features of manganese nodules,a method called“background gray value calculation”.As the result of the image procession with the aid this method,the two problems above are solved eventually,together with acquisition of a segmentable image of manganese *** a result,its comparison with other segmentation methods justifies its feasibility and *** from simulation results,it is indicated that this method is applicable to repair the target shape in the image,and segment the manganese nodule image in a short ***,it could be used to synchronously process a large number of manganese nodules on different conditions in an image,laying a good foundation for automatic underwater manganese nodule *** if the target in the image is slightly distorted,the statistical data of manganese nodules are still ***,other methods cannot be fully applied to the segmentation of manganese nodule images;in another word,the effectiveness and stability of this method are proved.

关键词： Underwater image image segmentation morphological dilation and erosion manganese nodules

Design and Control of Self-Heat Recuperative Distillation Process for Separation of Close-Boiling Mixtures: n-Butanol and iso-Butanol

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China Petroleum Processing & Petrochemical Technology 2015年第4期17卷 111-120页

作者： Li Lumin liu yuliang Zhai Jian Sun Lanyi Tian Yuanyu State Key Laboratory of Heavy Oil Processing China University of Petroleum

In order to explore the advantages of self-heat recuperative distillation(SHRD) process, the design and control of the SHRD process was studied for the separation of n-butanol and iso-butanol mixtures. The economic superiority of SHRD process is presented when a comparison on the total annual cost(TAC) of the conventional distillation process, the vapor recompression distillation process and the SHRD process was made. For the SHRD process, 37.74% and 11.35% savings of TAC can be achieved as compared to the conventional distillation process and vapor recompression distillation process, respectively. The dynamic characteristics of this promising SHRD sequence had been studied, and the dynamic responses demonstrated that 10% changes in both feed flow rate and feed composition can be well handled by the control strategy with dual-temperature control. It is proven that the SHRD system not only can provide economical savings but also can operate normally with good controllability.

关键词： n-butanol iso-butanol self-heat recuperative distillation total annual cost control

A novel malachite green staining approach for evaluating the internal freshness of egg by detecting the quality of egg cuticle

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Food Bioscience 2022年第6期50卷 814-822页

作者： Zixuan Xu yuliang liu Fangwei Yang Lijun Huang Hang Yu Weirong Yao Yunfei Xie State Key Laboratory of Food Science and Technology Jiangnan University1800 Lihu AvenueWuxiJiangsu214122China School of Food Science and Technology Jiangnan UniversityNo.1800 Lihu AvenueWuxi214122Jiangsu ProvinceChina Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province Jiangnan UniversityNo.1800 Lihu AvenueWuxi214122Jiangsu ProvinceChina Wuxi Food Safety Inspection and Test Center 35-210 Changjiang South RoadWuxi214142Jiangsu ProvinceChina

The cuticle is the outermost protective film of eggs, whose quality will affect internal freshness. At present, the undamaged detection of eggs freshness relies on hyperspectral imaging technology, which is relatively complicated. In this study, a novel simple approach for evaluating internal freshness of eggs was further explored by detecting the quality of egg cuticle. Malachite green selected as the alternative dye for quality evaluation of adhesive film, the correlation analysis was carried out by collecting the physical and chemical indexes of eggs with different degrees of freshness. It is found that there was a strong positive correlation between the quality of all parts of the cuticle and internal freshness (p < 0.01), and the Pearson correlation coefficient was over 0.85. The Haugh unit and pH of albumen were most strongly correlated with cuticle quality at the top, with the correlation coefficient of 0.919 and −0.906, respectively. The cuticle quality of eggs with contents got worse than that of eggs without contents, and the holes increased when they were stored for 28 days. In this way, malachite green staining method can be used to identify the freshness of egg cuticle, and the quality of egg cuticle can be used to distinguish eggs with different freshness. This study provided a new direction for the study of egg freshness and assisted to distinguish the quality and safety of eggs nondestructively.

关键词： Cuticle Egg freshness Bidirectional effect Quality evaluation Correlation analysis

Fast Segmentation Method of Sonar Images for Jacket Installation Environment

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Intelligent Automation & Soft Computing 2023年第5期36卷 1671-1686页

作者： Hande Mao Hongzhe Yan Lei Lin Wentao Dong Yuhang Li yuliang liu Jing Xue COOEC-Fluor Heavy Industries Co. Ltd.Zhuhai519000China Zhejiang Ocean University Zhoushan316022China Saint Petersburg State Marine Technical University Saint Petersburg190000Russia Wenzhou Institute of Technology Wenzhou325035China Deakin University BurwoodVIC 3125430070Australia

It has remained a hard nut for years to segment sonar images of jacket installation environment,most of which are noisy images with inevitable blur after noise *** the purpose of solutions to this problem,a fast segmen-tation algorithm is proposed on the basis of the gray value characteristics of sonar *** algorithm is endowed with the advantage in no need of segmentation *** realize this goal,we follow the undermentioned steps:ﬁrst,calcu-late the gray matrix of the fuzzy image *** adjusting the gray value,the image is divided into three regions:background region,buffer region and target ***ﬁltering,we reset the pixels with gray value lower than 255 to binarize images and eliminate most ***,the remaining noise is removed by morphological *** simulation results of several sonar images show that the algorithm can segment the fuzzy sonar images quickly and ***,the stable and feasible method is testiﬁed.

关键词： Image segmentation sonar image ocean engineering morphological image

OCRBench: on the hidden mystery of OCR in large multimodal models

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Science China(Information Sciences) 2024年第12期67卷 23-35页

作者： yuliang liu Zhang LI Mingxin HUANG Biao YANG Wenwen YU Chunyuan LI Xu-Cheng YIN Cheng-Lin liu Lianwen JIN Xiang BAI School of Artificial Intelligence and Automation Huazhong University of Science and Technology School of Electronic and Information Engineering South China University of Technology Microsoft Research School of Computer & Communication Engineering University of Science and Technology Beijing Institute of Automation Chinese Academy of Sciences School of Software Engineering Huazhong University of Science and Technology

Large models have recently played a dominant role in natural language processing and multimodal vision-language learning. However, their effectiveness in text-related visual tasks remains relatively unexplored. In this paper, we conducted a comprehensive evaluation of large multimodal models, such as GPT4V and Gemini, in various text-related visual tasks including text recognition, scene text-centric visual question answering(VQA), document-oriented VQA, key information extraction(KIE), and handwritten mathematical expression recognition(HMER). To facilitate the assessment of optical character recognition(OCR) capabilities in large multimodal models, we propose OCRBench, a comprehensive evaluation benchmark. OCRBench contains 29 datasets, making it the most comprehensive OCR evaluation benchmark available. Furthermore, our study reveals both the strengths and weaknesses of these models, particularly in handling multilingual text, handwritten text, non-semantic text, and mathematical expression *** importantly, the baseline results presented in this study could provide a foundational framework for the conception and assessment of innovative strategies targeted at enhancing zero-shot multimodal *** evaluation pipeline and benchmark are available at https://***/yuliang-liu/Multimodal OCR.

关键词： large multimodal model OCR text recognition scene text-centric VQA document-oriented VQA key information extraction handwritten mathematical expression recognition

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