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Feature-Grounded Single-Stage Text-to-Image Generation

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Tsinghua Science and Technology 2024年第2期29卷 469-480页

作者： yuan Zhou peng wang Lei Xiang Haofeng Zhang School of Artificial Intelligence Nanjing University of Information Science and TechnologyNanjing 210044China School of Computer Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China

Recently,Generative Adversarial Networks(GANs)have become the mainstream text-to-image(T2I)***,a standard normal distribution noise of inputs cannot provide sufficient information to synthesize an image that approaches the ground-truth image ***,the multistage generation strategy results in complex T2I ***,this study proposes a novel feature-grounded single-stage T2I model,which considers the“real”distribution learned from training images as one input and introduces a worst-case-optimized similarity measure into the loss function to enhance the model's generation *** results on two benchmark datasets demonstrate the competitive performance of the proposed model in terms of the Frechet inception distance and inception score compared to those of some classical and state-of-the-art models,showing the improved similarities among the generated image,text,and ground truth.

关键词： text-to-image(T2I) feature-grounded single-stage generation Generative Adversarial Network(GAN)

Rapid and nondestructive layer number identification of two-dimensional layered transition metal dichalcogenides

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Rare Metals 2017年第9期36卷 698-703页

作者： Jia-peng Wu Le wang Li-yuan Zhang Department of Physics Renmin University of ChinaBeijing 100872China Beijing Key Laboratory of Opto-Electronic Functional Materials&Micro-Nano Devices Renmin University of ChinaBeijing 100872China Department of Physics South University of Science and Technology of ChinaShenzhen 518055China

MoS2, MoSe2 and WSe2 thin flakes were fabricated by the standard micromechanical cleavage procedures. The thickness and the optical contrast of the atomic thin dichalcogenide flakes on SiO2/Si substrates were measured by atomic force microscopy（AFM） and spectroscopic ellipsometer. A rapid and nondestructive method by using reflection spectra was proposed to identify the layer number of 2D layered transition metal dichalcogenides on SiO2（275 nm）/Si substrates. The contrast spectra of 2D nanosheets with different layer numbers are in agreement with theoretical calculations based on Fresnel＇s law, indicating that this method provides an unambiguous and nondestructive contrast spectra fingerprint for identifying single-and few-layered transition metal dichalcogenides. The results will greatly help in fundamental research and application.

关键词： Transition metal dichalcogenides Opticalcontrast Layer number identification

Adaptive Multi-Bernoulli Filter Without Need of Prior Birth Multi-Bernoulli Random Finite Set

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Chinese Journal of Electronics 2018年第1期27卷 115-122页

作者： yuan Changshun wang Jun LEI peng SUN Jinping School of Electronic and Information Engineering Beihang University

Conventional Multi-Bernoulli(MBer) filter assumes that the birth MBer Random finite set(RFS)is known a priori. However, this is not true for practical scenario. This paper proposes a novel extension of the MBer filter which eliminates the reliance of the prior birth MBer RFS and relaxes the limitation in new-born target appearance volume. The proposed filter classifies the measurements into survival measurements and birth measurements, and adaptively generates the birth MBer RFS using the birth measurements. The novel filtering equations that distinguish the persistent and new-born targets are derived. A Sequential Monte-Carlo(SMC) implementation of the proposed filter is given. Simulations are performed to verify the improvement in the performance of the proposed filter.

关键词： Random finite set Adaptive multi-Bernoulli filter Sequential Monte-Carlo Multi-target tracking

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爆炸切割网络传爆中的间隙与角度效应

火工品 2025年第1期 37-43页

作者：周晓鹏姜勇袁航中国船舶集团有限公司第七一三研究所河南郑州450015 河南省水下智能装备重点实验室河南郑州450015

为研究爆炸切割网络中传爆节点处传爆能力的关键影响因素,通过改变切割索对传爆药柱的传爆间隙进行了平板传爆试验,将试验结果结合仿真分析确定了JO-11C传爆药柱的仿真材料参数,并进一步分析了传播角度对传爆能力的影响。研究结果表明:... 详细信息

为研究爆炸切割网络中传爆节点处传爆能力的关键影响因素,通过改变切割索对传爆药柱的传爆间隙进行了平板传爆试验,将试验结果结合仿真分析确定了JO-11C传爆药柱的仿真材料参数,并进一步分析了传播角度对传爆能力的影响。研究结果表明:随着传爆间隙的增加,传爆能力下降,切割索对传爆药柱的最大传爆间隙区间为2.0~2.5 mm;同时,传爆角度的增大能够显著提高传爆能力。本研究为爆炸切割网络的传爆性能研究以及提高武器系统的可靠性提供了参考。

关键词：爆炸切割网络传爆间隙传爆角度传爆药柱仿真分析

^(15)N发射光谱改良Dumas微量制样方法的研究

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核农学报 1986年第4期2卷 46-51页

作者：刘燕云彭根元王福钧北京农业大学同位素组

本文仅对改良 Dumas 微量制样方法的某些方面进行了研究。采用外径 D=6mm、长 L=15cm 的放电管,在改进的真空系统上制样,用 NOI-5型光谱仪测定,最低可测5μgN。在1 atom%^(15)N 以下,测量精度为0.01%,最大偏差为±0.02%。

关键词：放电管氧化剂收发开关管 Dumas 发射光谱制样方法吸收剂 CuO 毛细管钢管

Functionalization of covalent organic frameworks via multicomponent reactions

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Science China Chemistry 2024年第12期67卷 3906-3914页

作者： Xue-Hui Liu peng-Lai wang Wei wang San-yuan Ding State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical EngineeringMOE Frontiers Science Center for Rare IsotopesLanzhou UniversityLanzhou 730000China

Functionalized covalent organic frameworks(COFs)represent a fascinating class of porous materials that have attracted widespread interest due to their modifiable structures and impressive potential ***,the construction of functionalized COFs remains difficult as it requires simultaneous consideration of robust linkages,diversified structures,and tailorable ***,the introduction of multicomponent reactions(MCRs)into COF synthesis opens new avenues for creating highly stable and function-oriented COF materials,marking a significant advance in the development of *** minireview summarizes the types of MCRs used in COF synthesis,highlights the functionalization strategies of COFs via MCRs,and provides insights on the key challenges and future frontiers in this field.

关键词： covalent organic frameworks multicomponent reactions functionalization strategies

Dye removal from wastewater using the adsorbent developed from sewage sludge

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Journal of Environmental Sciences 2005年第6期17卷 1018-1021页

作者： CHEN Chun-yun wang peng ZHUANG yuan-yi School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China School of Biological and Environmental Engineering Jiangsu University Zhenjiang 212013 China

Sewage sludge was used to develop an effective carbon adsorbent. This adsorbent was employed for the removal of azo dye such as Direct Dark Brown M and Acid Mordant Brown RH. The adsorption of dyes on this adsorbent was studied as a function of contact time, concentration, pH and temperature by batch method. The equilibrium adsorption capacity of a carbonaceous adsorbent prepared from city wastewater treatment plant was 502, and 329.7 mg/g of Direct Dark Brown M and Acid Mordant Brown RH, respectively. The experimental data were analyzed by the Langmuir and Freundlich models of adsorption. Equilibrium data fitted well with the Langmuir model. The rates of adsorption were found to conform to the Lagergren second-order kinetics with good correlation. The equilibrium adsorption capacity of the carbonaceous adsorbents was determined with the Langmuir equation as well as the Lagergren second-order rate equation. The most ideal pH for adsorption of two dyes onto adsorbents was found to be 3 and below. The results indicate that the carbonaceous adsorbents could be employed as a low cost adsorbent in the removal of dyes from wastewater.

关键词： adsorbent sewage sludge azo dye isotherms kinetics

Automated Testing of Web Applications Using Combinatorial Strategies

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Journal of Computer Science & Technology 2017年第1期32卷 199-210页

作者： Xiao-Fang Qi Zi-yuan wang Jun-Qiang Mao peng wang School of Computer Science and Engineering Southeast University Nanjing 211189 China Key Laboratory of Computer Network and Information Integration Ministry of Education Nanjing 211189 China School of Computer Science and Technology Nanjing University of Posts and Telecommunications Nanjing 210023 China

Recently, testing techniques based on dynamic exploration, which try to automatically exercise every possible user interface element, have been extensively used to facilitate fully testing web applications. Most of such testing tools are however not effective in reaching dynamic pages induced by form interactions due to their emphasis on handling client-side scripting. In this paper, we present a combinatorial strategy to achieve a full form test and build an automated test model. We propose an algorithm called pairwise testing with constraints （PTC） to iraplement the strategy. Our PTC algorithm uses pairwise coverage and handles the issues of semantic constraints and illegal values. We have implemented a prototype tool ComjaxTest and conducted an empirical study on five web applications. Experimental results indicate that our PTC algorithm generates less form test cases while achieving a higher coverage of dynamic pages than the general pairwise testing algorithm. Additionally, our ComjaxTest generates a relatively complete test model and then detects more faults in a reasonable amount of time, as compared with other existing tools based on dynamic exploration.

关键词： automated testing combinatorial testing web application

A New Fire Detection Method Using a Multi-Expert System Based on Color Dispersion, Similarity and Centroid Motion in Indoor Environment

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IEEE/CAA Journal of Automatica Sinica 2020年第1期7卷 263-275页

作者： Teng wang Leping Bu Zhikai Yang peng yuan Jineng Ouyang College of Electrical Engineering Naval University of Engineering

In this paper, a video fire detection method is proposed, which demonstrated good performance in indoor environment. Three main novel ideas have been introduced. Firstly, a flame color model in RGB and HIS color space is used to extract pre-detected regions instead of traditional motion differential method, as it’s more suitable for fire detection in indoor environment. Secondly, according to the flicker characteristic of the flame, similarity and two main values of centroid motion are proposed. At the same time, a simple but effective method for tracking the same regions in consecutive frames is established. Thirdly,a multi-expert system consisting of color component dispersion,similarity and centroid motion is established to identify *** proposed method has been tested on a very large dataset of fire videos acquired both in real indoor environment tests and from the Internet. The experimental results show that the proposed approach achieved a balance between the false positive rate and the false negative rate, and demonstrated a better performance in terms of overall accuracy and F standard with respect to other similar fire detection methods in indoor environment.

关键词： Color dispersion centroid motion expert system RGB-HIS color model similarity video fire detection