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Image to Image Translation Based on Differential Image Pix2Pix Model

Computers, Materials & Continua 2023年第10期77卷 181-198页

作者： xi Zhao Haizheng Yu hong Bian College of Mathematics and System Sciences Xinjiang UniversityUrumqi830017China School of Mathematical Sciences Xinjiang Normal UniversityUrumqi830017China

In recent years,Pix2Pix,a model within the domain of GANs,has found widespread application in the field of image-to-image ***,traditional Pix2Pix models suffer from significant drawbacks in image generation,such as the loss of important information features during the encoding and decoding processes,as well as a lack of constraints during the training *** address these issues and improve the quality of Pix2Pixgenerated images,this paper introduces two key ***,to reduce information loss during encoding and decoding,we utilize the U-Net++network as the generator for the Pix2Pix model,incorporating denser skip-connection to minimize information ***,to enhance constraints during image generation,we introduce a specialized discriminator designed to distinguish differential images,further enhancing the quality of the generated *** conducted experiments on the facades dataset and the sketch portrait dataset from the Chinese University of hong Kong to validate our proposed *** experimental results demonstrate that our improved Pix2Pix model significantly enhances image quality and outperforms other models in the selected ***,the Pix2Pix model incorporating the differential image discriminator exhibits the most substantial improvements across all *** analysis of the experimental results reveals that the use of the U-Net++generator effectively reduces information feature loss,while the Pix2Pix model incorporating the differential image discriminator enhances the supervision of the generator during *** of these enhancements collectively improve the quality of Pix2Pix-generated images.

关键词： Image-to-image translation generative adversarial networks U-Net++ differential image Pix2Pix

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Optimal Tracking Performance With Model Uncertainty Over A Quantized Control Input

Optimal Tracking Performance With Model Uncertainty Over A Q...

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第25届中国控制与决策会议

作者： Ming Chi Zhi-hong Guan Fu-Shun Yuan xi-sheng Zhan Department of Control Science and Engineering Huazhong University of Science and Technology School of Mathematics and Statistics Anyang Normal University College of Mechatronics and Control Engineering Hubei Normal University

ISBN: (纸本)9781467355322

There has recently been significant interest in feedback control problems with communication constraints. But the existed work mainly assume that the plant has an exact model. The object of this paper is to investigate the optimal tracking problems for networked control system in the presence of plant uncertainty. This paper studies optimal tracking performance issues for finite-dimensional, continuous-time, linear time-invariant （LTI） networked control systems, in which the control input is subject to a quantization and the plant model with uncertainty. The problem under consideration amounts to determining the minimal tracking error, while we consider two-parameter controllers. The plant is assumed to be non-minimum phase and unstable, that is, the plant contains zeros in the right half and unstable poles. And we formulate the uncertainty by utilizing stochastic embedding. The integral square criterion is adopted to measure the tracking error. The results show that the quantization error and the model uncertainty, as well as the non-minimum phase zeros, can worsen the tracking performance.

关键词： quantization tracking performance limitation networked control systems uncertainty non-minimum phase zeros.

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Fe/S oxidation-coupled arsenic speciation transformation mediated by AMD enrichment culture under different pH conditions

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Journal of Environmental Sciences 2024年第3期137卷 681-700页

作者： Yu-hang Zhou Wei-xi Huang Zhen-yuan Nie hong-chang Liu Yue Liu Can Wang Jin-lan xia Wen-sheng Shu Key Lab of Biometallurgy of Ministry of Education of China School of Minerals Processing and BioengineeringCentral South UniversityChangsha 410083China School of Life Sciences South China Normal UniversityGuangzhou 510631China

Arsenic(As)speciation transformation in acid mine drainage(AMD)is comprehensively affected by biological and abiotic factors,such as microbially mediated Fe/S redox reactions and changes in environmental conditions(pH and oxidation-reduction potential).However,their combined impacts on arsenic speciation transformation remain poorly ***,we explored arsenic transformation and immobilization during pyrite dissolution mediated by AMD enrichment culture under different acidic pH *** results for incubation and mineralogical transformation of solid residues show that in the presence of AMD enrichment culture,pH 2.0,2.5,and 3.0 are more conducive to the formation of jarosites and ferric arsenate,which could immobilize high quantities of dissolved arsenic by adsorption and *** pH conditions significantly affect the initial adsorption of microbial cells to the minerals and the evolution of microbial community structure,further infuencing the biodissolution of pyrite and the release and oxidation process of Fe/*** results of Fe/S/As speciation transformation of the solid residues show that the transformation of Fe,S,and As in solution is mainly regulated by pH and potential values,which imposed significantly different effects on the formation of secondary minerals and thus arsenic oxidation and *** above results indicated that arsenic transformation is closely related to the Fe/S oxidation associated with pyrite bio-oxidation,and this correlation is critically regulated by the pH conditions of the system.

关键词： Acid mine drainage(AMD) pH conditions Fe/S/As speciation transformation Microbial community structure

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Thiourea functionalized CdSe/CdS quantum dots as a fluorescent sensor for mercury ion detection

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Chinese Chemical Letters 2016年第9期27卷 1531-1536页

作者： Li-Li xi hong-Bing Ma Guan-hong Tao College of Chemistry Chemical Engineering and Materials Science Soochow University Analytical and Testing Center Soochow University

CdSe/CdS quantum dots （QDs） functionalized by thiourea （TU） were synthesized and used as a fluorescent sensor for mercury ion detection. The TU-functionalized QDs were prepared by bonding TU via electrostatic interaction to the core/shell CdSe/CdS QDs after capping with thioglycolic acid （TGA）. It was observed that the fluorescence of the functionalized QDs was quenched upon the addition of Hg^2＋. The quantitative detection of Hg^2＋ with this fluorescent sensor could be conducted based on the linear relationship between the extent of quenching and the concentration of Hg^2＋ added in the range of 1-300 μg.L^-1, A detection limit of 0.56 μg.L^-1 was achieved. The sensor showed superior selectivity for Hg^2＋ and was successfully applied to the determination of mercury in environmental samples with satisfactory results

关键词： Quantum dots Fluorescent sensor Thiourea Quenching Mercury ion Detection

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Shear Fracture of Advanced High Strength Steels

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Journal of Iron and Steel Research International 2014年第10期21卷 938-944页

作者： sheng HUANG Yi-xi ZHAO Chun-feng HE State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong University Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures Shanghai Jiao Tong University

Failure experiments were carried out through a stretch-bending test system for advanced high strength steels, i.e. dual-phase （DP） steels and martensitic steels （MS）. The die radius in this system was designed from 1 to 15 mm to investigate the failure mode under different geometries. Two failure modes were observed during the ex- periments. As a result, critical relative radii （the ratio of inner bending radius R to sheet thickness t） for DP590 and DP780 steels were obtained. The stretch-bending tests of DP980 display some trends unlike DP590 and DP780 steels, and curve of DP980 in different thicknesses does not coincide well. High blank holder force exhibits more possibility of shear fracture tendency than low blank holder force. The unique character of high strength martensitic steel （1500MS） is that no shear fracture is found especially over small bending radius （R =2 mm） under the same experi- mental conditions. Microstructure analysis indicates that there are obviously elongated grains on shear fracture sur- face. It shows smaller diameter and shallower depth of the dimples than the necking failure.

关键词： advanced high strength steel shear fracture critical R/t blank holder force microstructure

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MicroRNA-214调控骨关节炎软骨和软骨下骨代谢的机制

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中国组织工程研究 2025年第12期29卷 2466-2474页

作者：天生王玺王永成刘亚宁阳鸿全内蒙古科技大学包头医学院研究生院内蒙古自治区包头市014000 广安市广安区人民医院四川省广安市638000 内蒙古医科大学内蒙古自治区呼和浩特市010000 内蒙古自治区人民医院骨科中心内蒙古自治区呼和浩特010000

背景:microRNA-214(miR-214)在骨质疏松中的作用国内外已有相关报道,而miR-214与骨关节炎关节软骨及软骨下骨退变之间的相互关系尚不清楚。目的:探讨miR-214与小鼠膝骨关节炎软骨及软骨下骨退变之间存在的关系。方法:取30只C57BL/6J小... 详细信息

背景:microRNA-214(miR-214)在骨质疏松中的作用国内外已有相关报道,而miR-214与骨关节炎关节软骨及软骨下骨退变之间的相互关系尚不清楚。目的:探讨miR-214与小鼠膝骨关节炎软骨及软骨下骨退变之间存在的关系。方法:取30只C57BL/6J小鼠随机分组:①实验一:分为假手术组和内侧半月板失稳组(n=3),分别进行苏木精-伊红染色和荧光定量PCR检测miR-214基因的表达变化;②实验二:分为假手术组、内侧半月板失稳组、内侧半月板失稳+空载腺病毒组(空载组)、内侧半月板失稳+miR-214拮抗剂过表达腺病毒组(拮抗剂组)(n=6),术后4周各组分别取软骨组织,进行苏木精-伊红、番红O固绿、甲苯胺蓝染色分析;荧光定量PCR、Western blot检测关节软骨中相关因子的表达情况。结果与结论:①实验一中,苏木精-伊红染色结果显示,与假手术组相比,内侧半月板失稳组可见软骨退变;荧光定量PCR检测结果显示,所有样本均有miR-214表达,而内侧半月板失稳组软骨样本中miR-214的表达水平明显高于假手术组(P<0.05);②实验二中,苏木精-伊红染色、番红O固绿染色、甲苯胺蓝染色结果显示,拮抗剂组软骨退变程度低于内侧半月板失稳组;腺病毒验证PCR检测结果显示,空载组软骨中miR-214表达水平高于拮抗剂组(P<0.05);③实验二中,X射线片显示,内侧半月板失稳组和空载组呈典型骨关节炎影像学变化,拮抗剂组关节退行性病变程度相对较轻;Mirco-CT检测结果显示,拮抗剂组在注入miR-214拮抗剂后,骨小梁结构模型指数变小,各项数据整体好于内侧半月板失稳组及空载组;④实验二Western blot检测结果显示,内侧半月板失稳组、空载组软骨标本中软骨相关因子Ⅱ型胶原α1、性别决定区Y框转录因子9、Runt相关转录因子2、骨桥蛋白的相对表达水平低于假手术组及拮抗剂组(P<0.05);而金属基质蛋白酶13的相对表达水平在内侧半月板失稳组、空载组高于假手术组及拮抗剂组(P<0.05);⑤实验二荧光定量PCR检测结果显示,与假手术组比较,肿瘤坏死因子α和白细胞介素6 mRNA的相对表达量在内侧半月板失稳组、空载组中表达相对较高,拮抗剂组中表达相对较低(P<0.05);内侧半月板失稳组、空载组高于拮抗剂组(P<0.05);⑥结果表明,骨关节炎小鼠模型的关节软骨中miR-214表达水平明显升高,提示miR-214表达水平的升高与骨关节炎有密切联系;而在骨关节炎小鼠模型膝关节腔内注入miR-214拮抗剂,可以延缓关节软骨退化、促进软骨下骨重塑,改善骨关节炎进展。

关键词： microRNA-214 骨关节炎关节软骨肿瘤坏死因子α 白细胞介素6 软骨下骨

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Wavelet Analysis of Space Solar Telescope Images

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Chinese Journal of Astronomy and Astrophysics 2003年第6期3卷 587-596页

作者： xi-AnZhu sheng-ZhenJin Jing-YuWang Shu-NianNing NationalAstronomicalObservatories ChineseAcademyofScienceBeijing100012 DepartmentofMechanicalandElectricEngineering ChinaCollegeofMiningandTechnologyBeijing100083

The scientific satellite SST (Space Solar Telescope) is an important research project strongly supported by the Chinese Academy of Sciences. Every day, SST acquires 50 GB of data (after processing) but only 10GB can be transmitted to the ground because of limited time of satellite passage and limited channel volume. Therefore, the data must be compressed before transmission. Wavelets analysis is a new technique developed over the last 10 years, with great potential of application. We start with a brief introduction to the essential principles of wavelet analysis, and then describe the main idea of embedded zerotree wavelet coding, used for compressing the SST images. The results show that this coding is adequate for the job.

关键词： stars: images - techniques: image processing - methods: wavelet analysis

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Effects of temperature and discharge parameters on ozone concentration of negative corona discharge

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Journal of Environmental Sciences 2003年第6期15卷 796-799页

作者： WANG Hai-jun sheng Lian-xi XU De-xuan Department of Environmental Science and Engineering College of Urban and Environmental ScienceNortheast Normal UniversityChangchun 130024China.

The relationship of the ozone generation and the heating power, corona wire surface temperature, discharge electrode and netting electrode was studied during the negative corona discharge. The experimental results showed that the ozone concentration reduced with applied voltage decrease. With heating power increase, the ozone concentration of unit current decreased at exponential rate and it almost change no longer over 0.40 W. Under given temperature, the lower the applied voltage was, the smaller the ozone concentration was; while under given applied voltages, only over 11 kV could decrease with the surface temperature increase. The ozone concentration decreased with the lengthening of corona wire, and could reduced to 10 ppb under experimental condition of 14.2 kV; it also decreased with the shortening of wire diameter, and could decrease 67% at best in the given condition. Moreover, it decreased with the increasing size of netting electrode mesh. At the anion current of 1.65 μΑ, the ozone concentration of 5.0×5.0 cm 2 is only 41% of that of 3.3×3.3 cm 2.

关键词： ozone negative corona discharge anion current

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Livelihood differentiation between two villages in Yesanpo Tourism District in China

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Journal of Mountain Science 2017年第11期14卷 2359-2372页

作者： HUANG Tai xi Jian-chao GE Quan-sheng Department of Tourism Management Soochow University Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences(CAS)

The rapidly developing rural tourism industry in China has deeply influenced the livelihoods of rural households. This study compares the impact of rural tourism development in poor areas on the farmers' livelihoods, based on the Sustainable Livelihoods Framework proposed by the United Kingdom's Department for International Development. Gougezhuang, a tourist village, and Jiaojiekou, a non-tourist village, both located in Yesanpo Tourism District in the state-level povertystricken Laishui County, Hebei Province, were selected as case studies. The livelihood models of the two villages show great differentiation after 20 years of tourism development. Gougezhuang Village has been driven by the tourism industry and farmers are employed locally, enjoying a relatively higher-income life, with a developmental livelihood model. In contrast, farmers in Jiaojiekou Village earn their living mainly by leaving home to work in the city. They have a low income, with a survival livelihood model, supported by part-time business. Considering that the two villages are adjacent and have similar development backgrounds, the analysis results indicate that rural tourism has an apparent locationspecific effect on poverty alleviation and socioeconomic development, but the development ofrural tourism is limited regarding large-scale poverty alleviation efforts in poor areas. To implement a propoor-tourism strategy and achieve sustainable development, it is necessary to implement comprehensive management measures to change the local conditions of rural settlements and make full use of the spillover effect of tourist consumption.

关键词： Sustainable Livelihoods Framework Livelihood differentiation Survival model Development model Tourism development Yesanpo

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Reporter Gene Assay for Detection of Shellfish Toxins

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Biomedical and Environmental Sciences 2009年第5期22卷 419-422页

作者： WEI-DONG YANG MIN-YI WU JIE-sheng LIU xi-CHUN PENG hong-YE LI School of Life Science and Technology Jinan UniversityGuangzhou 510632GuangdongChina

Objective To explore the potential reporter gene assay for the detection of sodium channel-specific toxins in shellfish as an alternative for screening harmful algal bloom (HAB) toxins, considering the fact that the existing methods including HPLC and bioassay are inappropriate for identifying HAB toxins which poses a serious problem on human health and shellfish industry. Methods A reporter plasmid pEGFP-c-fos containing c-fos promoter and EGFP was constructed and transfected into T24 cells using LipofectAMINE 2000. Positive transfcctants were screened by G418 to produce a pEGFP-c-fos-T24 cell line. After addition of increasing neurotoxic shellfish poison (NSP) or GTX2,3, primary components of paralytic shellfish poison (PSP), changes in expression of EGFP in the cell line were observed under a laser scanning confocal microscope and quantified with Image-pro Plus software. Results Dose-dependent changes in the intensity of green fluorescence were observed for NSP in a range from 0 to 10 ng/mL and for GTX2,3 from 0 to 16 ng/mL. Conclusion pEGFP-c-fos-T24 can be applied in detecting HAB toxins, and cell-based assay can be used as an alternative for screening sodium channel-specific HAB toxins.

关键词： Shellfish poisoning Green fluorescent protein Harmful algal bloom toxins

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