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Revealing the GHG reduction potential of emerging biomass-based CO_(2) utilization with an iron cycle system

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Frontiers of Environmental Science & Engineering 2023年第10期17卷 119-131页

作者： Jing Xu jiong cheng Runtian He Jiaqi Lu Chunling Wang Heng Zhong Fangming Jin School of Environmental Science and Engineering State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240China Innovation Centre for Environment and Resources Shanghai University of Engineering ScienceShanghai 201620China Center of Hydrogen Science Shanghai Jiao Tong UniversityShanghai 200240China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

CO_(2) utilization becomes a promising solution for reducing anthropogenic greenhouse gas (GHG) emissions. Biomass-based CO_(2) utilization (BCU) even has the potential to generate negative emissions, but the corresponding quantitative evaluation is limited. Herein, the biomass-based CO_(2) utilization with an iron cycle (BCU-Fe) system, which converts CO_(2) into formate by Fe under hydrothermal conditions and recovers Fe with biomass-derived glycerin, was investigated. The GHG reduction potential under various process designs was quantified by a multidisciplinary method, including experiments, simulations, and an ex-ante life-cycle assessment. The results reveal that the BCU-Fe system could bring considerable GHG emission reduction. Significantly, the lowest value is −34.03 kg CO_(2)-eq/kg absorbed CO_(2) (−2.44 kg CO_(2)-eq/kg circulated Fe) with the optimal yield of formate (66%) and Fe (80%). The proposed ex-ante evaluation approach not only reveals the benefits of mitigating climate change by applying the BCU-Fe system, but also serves as a generic tool to guide the industrialization of emerging carbon-neutral technologies.

关键词： Carbon dioxide utilization Hydrothermal reactions Biomass-based CO_(2)reduction Simulation Ex-ante LCA

Nonlinearly induced entanglement in dissipatively coupled optomechanical system

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Chinese Physics B 2024年第6期33卷 255-260页

作者：杨文全冷轩程泂张闻钊 Department of Physics Ningbo UniversityNingbo 315211China

Nonlinearly induced steady-state photon–phonon entanglement of a dissipative coupled system is studied in the bistable regime. Quantum dynamical characteristics are analysed by solving the mean-field and fluctuation equations of the system. It is shown that dissipative coupling can induce bistable behaviour for the effective dissipation of the system.Under suitable parameters, one of the steady states significantly reduces the dissipative effect of the system. Consequently,a larger steady-state entanglement can be achieved compared to linear dynamics. Furthermore, the experimental feasibility of the parameters is analysed. Our results provide a new perspective for the implementation of steady-state optomechanical entanglement.

关键词： entanglement optomechanical system dissipatively coupling

基于β-环糊精主客体识别的胆固醇吸附剂的研究进展

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离子交换与吸附 2024年第1期40卷 37-47页

作者：鲁炯呈黄雯贾永光蔡莉莉华南理工大学材料科学与工程学院广州华立科技职业学院

胆固醇是人体内必不可少的一种脂质分子，在人体的代谢过程中发挥着至关重要的作用。机体内胆固醇淤积往往与动脉粥样硬化、C型尼曼匹克氏症等疾病的发生密切相关，但现今药物的副作用以及禁忌症给临床治疗带来了诸多不便。β-环糊精是... 详细信息

胆固醇是人体内必不可少的一种脂质分子，在人体的代谢过程中发挥着至关重要的作用。机体内胆固醇淤积往往与动脉粥样硬化、C型尼曼匹克氏症等疾病的发生密切相关，但现今药物的副作用以及禁忌症给临床治疗带来了诸多不便。β-环糊精是一种能够识别胆固醇的天然大环分子，其与胆固醇之间的主客体相互识别作用可用于胆固醇的特异性吸附与清除。在本综述中，我们总结了近年来基于β-环糊精主客体识别作用的胆固醇吸附剂的制备方法、设计原理及研究现状，展现了β-环糊精作为功能吸附基团在治疗高胆固醇相关疾病应用上的巨大潜力。

关键词：环糊精胆固醇主客体相互作用吸附剂

Interactions between biochar,soil organic carbon and added nutrients in soil environment

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Interactions between biochar,soil organic carbon and added n...

Quantum estimation of rotational speed in optomechanics

2019年中国土壤学会土壤环境专业委员会、土壤化学专业委员会联合学术研讨会

作者： Xinyu Jiang jiong cheng M.Francesca Cotrufo Guangdong Institute of Eco-environmental Science & Technology Colorado State University

Biochar has been considered a stable additive for long-term soil carbon (C) storage and climate change mitigation.However,our understanding of the long-term interactions between aged biochar,soil o

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Chinese Physics B 2023年第10期32卷 377-382页

作者：李浩程泂 Department of Physics Ningbo UniversityNingbo 315211China

We study the quantum Fisher information(QFI)of the angular velocity of rotation in an optomechanical system.Based on the Gaussian measurements method,we derive the explicit form of a single-mode Gaussian QFI,which is valid for arbitrary angular velocity of rotation.The information about the angular velocity to be measured is contained in the optical covariance matrix,which can be experimentally determined via homodyne measurement.We find that QFI increases rapidly when driving the system close to the unstable boundary.This result can be attributed to the strong nonlinearity of the system at the unstable boundary.Our results indicate the possibility of using an optomechanical system for high precision detection of the angular velocity of rotation.

关键词： optomechanical system Fisher information

Wnt/β-catenin与肾脏损伤后的修复和纤维化

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生理学报 2022年第1期74卷 15-27页

作者：任倩陈炯城刘友华南方医科大学南方医院肾内科器官衰竭防治国家重点实验室国家肾脏病临床医学研究中心广州510515

Wnt/β-catenin信号是一条进化上高度保守且极度复杂的发育信号通路,可调控胚胎发育、损伤修复以及多种人类疾病的发生、发展。大量证据表明,Wnt/β-catenin信号在肾脏早期发育中起关键作用,而在成年肾脏中则相对沉默。在多种肾脏病动... 详细信息

Wnt/β-catenin信号是一条进化上高度保守且极度复杂的发育信号通路,可调控胚胎发育、损伤修复以及多种人类疾病的发生、发展。大量证据表明,Wnt/β-catenin信号在肾脏早期发育中起关键作用,而在成年肾脏中则相对沉默。在多种肾脏病动物模型和人类肾脏疾病中它又被重新激活。急性肾损伤后Wnt/β-catenin的激活有助于受损肾小管的修复和再生。然而,该信号的持续激活与慢性肾脏疾病和肾纤维化的发生、发展密切相关。在本文中,我们对Wnt/β-catenin信号通路的组成及其转导机制,以及它在肾脏损伤后修复和纤维化过程中的作用进行较为系统的综述。深入阐明此信号通路的机制可能为将来防治肾脏病提供新的靶点和策略。

关键词： Wnt/β-catenin 急性肾损伤损伤修复肾纤维化慢性肾脏病

Mechanical behavior of 2G NPR bolt anchored rock samples under static disturbance loading

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Journal of Mountain Science 2024年第7期21卷 2494-2516页

作者： WANG jiong JIANG Jian WANG Siyu CHANG Yiwen LIU Peng HE Manchao cheng Shuang State Key Laboratory for Tunnel Engineering China University of Mining and Technology(Beijing)Beijing 100083China School of Mechanics and Civil Engineering China University of Mining and Technology(Beijing)Beijing 100083China

The deep mining of coal resources is accompanied by severe environmental challenges and various potential engineering hazards.The implementation of NPR(negative Poisson's ratio)bolts are capable of controlling large deformations in the surrounding rock effectively.This paper focuses on studying the mechanical properties of the NPR bolt under static disturbance load.The deep nonlinear mechanical experimental system was used to study the mechanical behavior of rock samples with different anchored types(unanchored/PR anchored/2G NPR anchored)under static disturbance load.The whole process of rock samples was taken by high-speed camera to obtain the real-time failure characteristics under static disturbance load.At the same time,the acoustic emission signal was collected to obtain the key characteristic parameters of acoustic emission such as acoustic emission count,energy,and frequency.The deformation at the failure of the samples was calculated and analyzed by digital speckle software.The findings indicate that the failure mode of rock is influenced by different types of anchoring.The peak failure strength of 2G NPR bolt anchored rock samples exhibits an increase of 6.5%when compared to the unanchored rock samples.The cumulative count and cumulative energy of acoustic emission exhibit a decrease of 62.16%and 62.90%,respectively.The maximum deformation of bearing capacity exhibits an increase of 59.27%,while the failure time demonstrates a delay of 42.86%.The peak failure strength of the 2G NPR bolt anchored ones under static disturbance load exhibits an increase of 5.94%when compared to the rock anchored by PR(Poisson's ratio)bolt.The cumulative count and cumulative energy of acoustic emission exhibit a decrease of 47.16%and 43.86%,respectively.The maximum deformation of the bearing capacity exhibits an increase of 50.43%,and the failure time demonstrates a delay of 32%.After anchoring by 2G NPR bolt,anchoring support effectively reduces the risk of damage caused by static disturbance load.These results demonstrate

关键词： Anchored rock samples Static disturbance load Acoustic emission characteristics Digital speckle Negative Poisson's ratio

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改进圆盘试验方法分析与抗拉强度公式的修正

地下空间与工程学报 2022年第4期18卷 1104-1110页

作者：郑伟程炯黎冰深圳高速工程顾问有限公司广东深圳518000 中国能源建设集团浙江省电力设计院有限公司杭州310000 东南大学土木工程学院南京210096

测定岩石、混凝土等脆性材料抗拉强度时最常用的方法是改进巴西圆盘试验,但存在几种不同的改进圆盘试验方法,各试验结果是否准确、相互之间有何差异需要明确。考虑不同的加载面圆心角,通过数值模拟的方法对比分析了3种改进圆盘试验之间... 详细信息

测定岩石、混凝土等脆性材料抗拉强度时最常用的方法是改进巴西圆盘试验,但存在几种不同的改进圆盘试验方法,各试验结果是否准确、相互之间有何差异需要明确。考虑不同的加载面圆心角,通过数值模拟的方法对比分析了3种改进圆盘试验之间的差异,并与理论结果进行了对比。结果显示,相同的加载面圆心角,采用弧形集中加载模式时试样劈裂面上的拉应力区分布范围最大,其次是弧形均布加载模式,最后是平台加载模式。当加载面圆心角在20°~40°范围内时,试样满足中心起裂的要求,且试样中心点处压应力与拉应力的比值较小,因此建议采用该范围内的加载面圆心角进行试验。根据脆性材料格里菲斯破坏准则,引入了修正系数k,对改进圆盘试验抗拉强度公式进行了修正。

关键词：改进圆盘试验抗拉强度加载面圆心角格里菲斯准则

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立方体劈裂抗拉试验数值模拟与强度计算分析

建筑科学 2023年第7期39卷 17-27页

作者：魏杉程炯黎冰东南大学土木工程学院江苏南京210096 中国能源建设集团浙江省电力设计院有限公司浙江杭州310000

我国现行相关规范对于立方体试件劈裂抗拉强度的计算采用的是传统圆盘劈裂抗拉强度计算公式,而未考虑试件形状和木质垫条的影响。通过ABAQUS软件对立方体试件劈裂抗拉试验开展了二维和三维数值模拟,研究了试件的应力状态以及垫条宽度的... 详细信息

我国现行相关规范对于立方体试件劈裂抗拉强度的计算采用的是传统圆盘劈裂抗拉强度计算公式,而未考虑试件形状和木质垫条的影响。通过ABAQUS软件对立方体试件劈裂抗拉试验开展了二维和三维数值模拟,研究了试件的应力状态以及垫条宽度的影响,并结合Griffith强度准则分析了试件的起裂点位置。结果表明,集中力作用下立方体试件劈裂面上的拉应力最大值并不是位于试件中心,而是位于加载面附近;设置木质垫条进行试验加载能够有效缓解加载面上的应力集中现象,木质垫条传递荷载的有效宽度不超过30mm;采用规范规定的宽度为15mm~20mm的木质垫条时,立方体试件不满足中心点起裂的要求。基于二维数值模拟结果,引入修正系数k对规范中的劈裂抗拉强度公式进行修正,以考虑垫条宽度对试验结果的影响。该修正公式可为立方体劈裂抗拉试验确定材料抗拉强度所用。

关键词：劈裂抗拉试验劈裂抗拉强度数值模拟立方体试件垫条