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基于改进YOLOv4的水下垃圾清理机器人视觉检测算法 Research Article

田满军1,2,李霞丽2,孔诗涵3,吴立成2,喻俊志3,4

《信息与电子工程前沿（英文）》 2022年第23卷第8期页码 1217-1228 doi: 10.1631/FITEE.2100473

摘要：为解决水环境污染问题，依托基于视觉的水下垃圾自主清理机器人，提出一种基于改进YOLOv4的垃圾检测方法，可实现高速、高精度的目标检测。具体而言，选择YOLOv4算法作为执行目标检测的基本神经网络框架。为进一步提高检测精度，将传统YOLOv4改进为四尺度检测算法；为提高检测速度，对新模型进行模型剪枝操作。同时，将所提方法应用于水下机器人，实现了自主垃圾收集作业。检测速度可达66.67帧/秒，平均准确率可达95.099%；实验结果表明，改进后的YOLOv4算法在检测速度和精度方面均表现优秀。

关键词：目标检测；水环境；垃圾清理机器人；改进YOLOv4

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一种BP神经网络的改进方法及其应用

李宏刚,吕辉,李刚

《中国工程科学》 2005年第7卷第5期页码 63-65

摘要：仿真结果表明，在导弹指令跟踪中，改进算法比原来算法优越得多。

关键词：神经网络改进算法仿真

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基于时间分数阶导数的改进ROF去噪模型 Research Articles

廖星冉

《信息与电子工程前沿（英文）》 2020年第21卷第6期页码 809-962 doi: 10.1631/FITEE.2000067

摘要：数值试验结果表明，改进的模型比现有模型具有更强去噪和纹理保持能力。

关键词：改进ROF去噪模型；时间分数阶导数；Caputo导数；图像去噪

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遗传算法的改进及其在水库优化调度中的应用研究

钟登华,熊开智,成立芹

《中国工程科学》 2003年第5卷第9期页码 22-26

摘要：

遗传算法是通过对样本中个体的不断改进来寻找各类问题的最优解。由于标准遗传算法（SGA）存在收敛性及个体适应度求解方面的困难，在研究中，通过对SGA中遗传算子改进，特别是对选择算子的改进，提出了一种改进遗传算法（AGA），并将它应用于水库优化调度中。

关键词：遗传算法改进水库优化调度

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基于改进Merkle哈希树的仿生水声通信安全方案 Research Articles

Masoud KAVEH,Abolfazl FALAHATI

《信息与电子工程前沿（英文）》 2021年第22卷第7期页码 1010-1019 doi: 10.1631/FITEE.2000043

摘要：提出一种基于改进Merkle哈希树的安全方案，能够抵御当前水下攻击，具体包含重放攻击、伪造消息攻击、消息篡改攻击和分析攻击。进行安全性分析，证明所提方案能够抵抗这些类型的攻击。

关键词：海豚哨音；改进Merkle哈希树；安全水声通信（UWAC）

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ZnFe₂O₄/BiVO₄ Z-scheme heterojunction for efficient visible-light photocatalytic

《化学科学与工程前沿（英文）》 2023年第17卷第11期页码 1728-1740 doi: 10.1007/s11705-023-2322-z

摘要： A novel Z-scheme ZnFe₂O₄/BiVO₄ heterojunction photocatalyst was successfully synthesized using a convenient solvothermal method and applied in the visible light photocatalytic degradation of ciprofloxacin, which is a typical antibiotic contaminant in wastewater. The heterostructure of as-synthesized catalysts was confirmed using X-ray diffraction, scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy characterizations. Compared with the single-phase counterparts, ZnFe₂O₄/BiVO₄ demonstrated considerably enhanced photogenerated charge separation efficiencies because of the Z-scheme transfer mechanism of electrons between the composite photocatalysts. Consequently, the 30% ZnFe₂O₄/BiVO₄ catalyst afforded a degradation rate of up to 97% of 20 mg/L ciprofloxacin under 30 min of visible light irradiation with a total organic carbon removal rate of 50%, which is an excellent activity compared with ever reported BiVO₄-based catalysts. In addition, the liquid chromatography-mass spectrometry and quantitative structure-activity relationships model analyses demonstrated that the toxicity of the intermediates was lower than that of the parent ciprofloxacin. Moreover, the as-synthesized ZnFe₂O₄/BiVO₄ heterojunctions were quite stable and could be reused at least four times. This study thus provides a promising Z-scheme heterojunction photocatalyst for the efficient removal and detoxication of antibiotic pollutants from wastewater.

关键词： ZnFe₂O₄/BiVO₄ Z-scheme heterojunction photocatalytic degradation ciprofloxacin

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用改进的Boussinesq方程模拟潜堤上的波浪变形

郑永红,沈永明,吴修广,游亚戈

《中国工程科学》 2004年第6卷第4期页码 34-40

摘要：

研究了一种改进的Boussinesq方程，采用预报校正格式对该方程进行了数值离散，并对淹没潜堤上的波浪变形进行了数值模拟，从数值模拟结果和实测值的比较结果来看，该方程能较好地模拟波浪在潜堤上传播时波面的变形过程这种改进的Boussinesq方程本身及其求解方法需做进一步的完善。研究结果为实际应用Boussinesq方程来研究复杂地形上的波浪传播提供一定的理论指导。

关键词：改进的Boussinesq方程数值模拟波浪变形潜堤

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Li₄SiO₄-coated LiNi_0.5Mn_1.5O₄ as the high performance

Shifeng YANG, Wenfeng REN, Jian CHEN

《能源前沿（英文）》 2017年第11卷第3期页码 374-382 doi: 10.1007/s11708-017-0494-2

摘要： The preparation of Li SiO -coated LiNi Mn O materials by sintering the SiO -coated nickel-manganese oxides with lithium salts using abundant and low-cost sodium silicate as the silicon source was reported. The samples were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. It was found that a uniform and complete SiO coating layer could be obtained at a suitable pH value of 10, which transformed to a good Li SiO coating layer afterwards. When used as the cathode materials for lithium-ion batteries, the Li SiO -coated LiNi Mn O samples deliver a better electrochemical performance in terms of the discharge capacity, rate capability, and cycling stability than that of the pristine material. It can still deliver 111.1 mAh/g at 20 C after 300 cycles, with a retention ratio of 93.1% of the stable capacity, which is far beyond that of the pristine material (101.3 mAh/g, 85.6%).

关键词： lithium-ion batteries cathode material LiNi_0.5Mn_1.5O₄ lithium-ion conductor coating

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Enhanced debromination of 2,2′,4,4′-tetrabromodiphenyl ether (BDE-47) by zero-valent zinc with ascorbic

Chaojin Jiang, Xiaoqian Jiang, Lixun Zhang, Yuntao Guan

《环境科学与工程前沿（英文）》 2020年第14卷第3期 doi: 10.1007/s11783-020-1224-2

摘要： Highly efficient debromination of BDE-47 was achieved in the ZVZ/AA system. BDE-47 debromination by the ZVZ/AA can be applied to a wide range of pH. AA inhibits the formation of (hydr)oxide and accelerates the corrosion of ZVZ. Reduction mechanism of BDE-47 debromination by the ZVZ/AA system was proposed. A new technique of zero-valent zinc coupled with ascorbic acid (ZVZ/AA) was developed and applied to debrominate the 2,2′,4,4′-Tetrabromodiphenyl ether (BDE-47), which achieved high conversion and rapid debromination of BDE-47 to less- or non-toxic forms. The reaction conditions were optimized by the addition of 100 mg/L ZVZ particles and 3 mmol/L AA at original solution pH= 4.00 using the solvent of methanol/H2O (v:v= 4:6), which could convert approximately 94% of 5 mg/L BDE-47 into lower-brominated diphenyl ethers within a 90 min at the ZVZ/AA system. The high debromination of BDE-47 was mainly attributed to the effect of AA that inhibits the formation of Zn(II)(hydr)oxide passivation layers and promotes the corrosion of ZVZ, which leads to increase the reactivity of ZVZ. Additionally, ion chromatography and gas chromatography mass spectrometry analyses revealed that bromine ion and lower-debromination diphenyl ethers formed during the reduction of BDE-47. Furthermore, based on the generation of the intermediates products, and its concentration changes over time, it was proposed that the dominant pathway for conversion of BDE-47 was sequential debromination and the final products were diphenyl ethers. These results suggested that the ZVZ/AA system has the potential for highly efficient debromination of BDE-47 from wastewater.

关键词： 2 2′ 4 4′-tetrabromodiphenyl ether (BDE-47) Ascorbic acid Reductive debromination Zero-valent zinc

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Knockdown of RFC4 inhibits the cell proliferation of nasopharyngeal carcinoma and

《医学前沿（英文）》 2023年第17卷第1期页码 132-142 doi: 10.1007/s11684-022-0938-x

摘要： Nasopharyngeal carcinoma (NPC) is a malignant tumor that mainly occurs in East and Southeast Asia. Although patients benefit from the main NPC treatments (e.g., radiotherapy and concurrent chemotherapy), persistent and recurrent diseases still occur in some NPC patients. Therefore, investigating the pathogenesis of NPC is of great clinical significance. In the present study, replication factor c subunit 4 (RFC4) is a key potential target involved in NPC progression via bioinformatics analysis. Furthermore, the expression and mechanism of RFC4 in NPC were investigated in vitro and in vivo. Our results revealed that RFC4 was more elevated in NPC tumor tissues than in normal tissues. RFC4 knockdown induced G2/M cell cycle arrest and inhibited NPC cell proliferation in vitro and in vivo. Interestingly, HOXA10 was confirmed as a downstream target of RFC4, and the overexpression of HOXA10 attenuated the silencing of RFC4-induced cell proliferation, colony formation inhibition, and cell cycle arrest. For the first time, this study reveals that RFC4 is required for NPC cell proliferation and may play a pivotal role in NPC tumorigenesis.

关键词： nasopharyngeal carcinoma WGCNA RFC4 proliferation

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4D打印定律 Article

Farhang Momeni, Jun Ni

《工程（英文）》 2020年第6卷第9期页码 1035-1055 doi: 10.1016/j.eng.2020.01.015

摘要：相应地，四维(4D)打印是一个涉及多个研究领域的制造工艺。4D打印保留了3D打印的一般属性(如减少材料浪费、消除注射模具、冲压模具和机械加工过程)，并且随着时间的推移能实现产品第四维度的智能行为。3D和4D打印结构的主要区别是4D打印存在一个附加的维度，这个维度可以随着时间的推移进行智能进化。然而，目前还没有用于建模和预测这个附加维度的一般公式。本文从基本原理开始，导出并验证了一个具有特定格式的一般双指数公式，该公式可以模拟几乎所有4D结构的时间相关性行为(如水、光化学、光热、溶剂、pH、湿度、电化学、电热、超声波等响应)。研究表明，需要利用两种类型的时间常数来捕捉4D多材料的正确的时间相关性行为。本文引入了4D多材料结构中主动材料和被动材料的界面错配压力的概念，从而得到了两个时间常数之一。本文的结果从最基本的概念开始，并以控制方程结束，可以作为未来4D打印领域研究的一般设计原则，其中时间相关性行为应该被正确地理解、建模和预测。

关键词：制造业刺激响应材料材料力学时间常数 4D打印

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Synthesis, insecticidal activities and DFT study of pyrimidin-4-amine derivatives containing the 1,2,4

《化学科学与工程前沿（英文）》 2022年第16卷第7期页码 1090-1100 doi: 10.1007/s11705-021-2091-5

摘要： Twenty six novel pyrimidin-4-amine derivatives containing the 1,2,4-oxadiazole motif were synthesized. Their chemical structures were confirmed by ¹H nuclear magnetic resonance (NMR), ¹³C NMR, and high-resolution mass spectrography. The insecticidal activity results indicated that some of them possessed excellent insecticidal activity (100%) against Mythimna separate, especially for compounds 6d, 6f, 6o, 6w, 6y and 6z. These compounds exhibited no activity against the insects Aphis medicagini and Tetranychus cinnabarinus. The structure- insecticidal activity relationships are discussed. Density functional theory analysis can potentially be used to design more active compounds. These results provide useful insecticide design information for further optimization.

关键词： synthesis pyrimidin-4-amine derivatives 1 2 4-oxadiazole insecticidal activity structure-activity relationship

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Identifying stakeholders’ roles and relevant project documents for 4D-based collaborative decision making

Veronika BOLSHAKOVA, Annie GUERRIERO, Gilles HALIN

《工程管理前沿（英文）》 2020年第7卷第1期页码 104-118 doi: 10.1007/s42524-019-0041-4

摘要： To fully understand and effectively implement 4D building information modelling (BIM) models and methods, we need to develop a precise knowledge of which project digital documents should be used and how they influence the decision-making (DM) process. This article studies the convergence between uses of 4D BIM and digital project documents. We hypothesize that a clear visualization of the construction simulation through a 4D model is a useful source of information and a support for DM at collaborative meetings. Through this research, we continue to progress toward a new 4D-based collective decision device, so these elements will contribute to propose 4D BIM as DM support on architecture engineering construction (AEC) projects. Further, the present research will be complemented by results from questionnaires given at a later research stage. The article presents a brief review of BIM context to consider ways of fostering the implementation of all 4D BIM uses (not only visualization). It then introduces a proposition for 4D BIM uses implementation by the project development phase. It concludes by summarizing stakeholders’ roles and documents relevant to 4D BIM uses.

关键词： BIM 4D BIM 4D BIM use AEC project management collaboration decision making

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4Pi荧光超分辨显微术综述 Review

郝翔, 李依明, 傅爽, 李旸晖, 许迎科, 匡翠方, 刘旭

《工程（英文）》 2022年第11卷第4期页码 146-153 doi: 10.1016/j.eng.2020.07.028

摘要：回顾这些历程，一个重要的里程碑是基于两个对置物镜的4Pi 显微架构及其超分辨版本的出现。鉴于此，本文综述了4Pi 超分辨显微术的近期进展。总体上，4Pi 超分辨显微镜为透明样品观测提供了一
种能够突破衍射极限、非侵入、各向同性的三维分辨率的技术手段。具体而言，本文针对目标开关和随机开关两个主要4Pi 超分辨显微术版本，讨论了它们的架构、原理、应用和未来发展趋势。

关键词：荧光超分辨显微术超分辨成像 4Pi超分辨显微术 isoSTED 4Pi-SMLM

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对双层组件4D打印可逆性的初步研究 Article

Amelia Yilin Lee, Jia An, Chee Kai Chu, Yi Zhang

《工程（英文）》 2019年第5卷第6期页码 1159-1170 doi: 10.1016/j.eng.2019.09.007

摘要：

增材制造的快速发展和形状记忆聚合物材料的进步推动了四维（4D）打印技术的进展。随着设计方面的不断改进，逐渐证明有可能实现可逆4D打印或双向4D打印。这项技术将完全消除对人为干预的需要，因为编程完全由外部刺激驱动，这使得4D打印部件可以在多个周期内启动。本研究提出了一种新的可逆4D打印驱动方法，其中弹性体的溶胀和热量用于编程阶段，以及热量用于恢复阶段。本研究的主要重点在于自驱动设计这一步骤。采用这种方式理解曲率可以提供对可逆4D打印结构的高度控制。

关键词： 4D打印增材制造形状记忆聚合物可逆4D打印双向4D打印溶胀弹性体