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基于混合供能和能量协作的异构网络能量效率优化算法

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通信学报 2022年第3期43卷 135-147页

作者：曹阳钟烨彭醇陵彭小峰重庆理工大学电气与电子工程学院重庆400054

为降低异构蜂窝网络的基站能耗和同频干扰,联合能量收集与能量协作提出一种以能量效率优化为目标的联合优化算法。首先,考虑用户服务质量约束、蜂窝基站功率约束以及可再生能源收集约束,构建联合资源分配的混合整数非线性规划问题。其次... 详细信息

为降低异构蜂窝网络的基站能耗和同频干扰,联合能量收集与能量协作提出一种以能量效率优化为目标的联合优化算法。首先,考虑用户服务质量约束、蜂窝基站功率约束以及可再生能源收集约束,构建联合资源分配的混合整数非线性规划问题。其次,考虑到该问题是一个NP-难问题,难以直接求解,结合固定变量法将复杂原问题分解成单独求解用户关联、功率分配、能量协作3个子问题,分别利用拉格朗日对偶法、粒子群优化算法和匹配理论求解这3个子问题。最后,通过收敛迭代算法,联合以上3种算法求得原问题的最终解。仿真结果表明,所提算法相较于对比算法在收敛性和能量效率上均有改善。

关键词：异构网络能量效率拉格朗日对偶匹配理论粒子群优化算法

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机器人手术系统在小儿泌尿外科的应用与进展

中华腔镜泌尿外科杂志(电子版) 2024年第3期18卷 284-288页

作者：李彬瑶邓富铭高晓峰赵彰张正涛周锐朱士博钟竞斌刘国昌伏雯广州市妇女儿童医疗中心泌尿外科

机器人手术在小儿泌尿外科手术中成功率与标准腹腔镜相似，已广泛应用于肾盂成形术、输尿管膀胱再植术、肾部分切除术等。复杂手术包括膀胱扩容术、膀胱颈重建等也在进行机器人辅助的探索。机器人手术系统因其精密稳定的机械臂，灵巧配... 详细信息

机器人手术在小儿泌尿外科手术中成功率与标准腹腔镜相似，已广泛应用于肾盂成形术、输尿管膀胱再植术、肾部分切除术等。复杂手术包括膀胱扩容术、膀胱颈重建等也在进行机器人辅助的探索。机器人手术系统因其精密稳定的机械臂，灵巧配适的控制台，高清真实的3D成像设备等，有望成为小儿泌尿外科重建技术的主流。

关键词：达芬奇机器人肾盂成形术输尿管膀胱再植术肾部分切除术输尿管切除术阑尾膀胱吻合术膀胱扩容术膀胱颈重建术小儿外科

Solid-liquid-core optical fiber biosensor for highly sensitive and selective detection of 4-chlorophenol in water

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Chinese Chemical Letters 2023年第12期34卷 287-290页

作者： Cangxu Feng Jianwei Zhang Chao Bian Linyang Li Rong Hu Haixing Chang Fei Peng xiaofeng Peng Nianbing zhong Center for Hydrogeology and Environmental Geology Survey China Geological SurveyBaoding 071051China Intlligent Fiber Sensing Technology of Chongqing Municipal Engineering Research Center of Institutions of Higher Education Chongqing Key Laboratory of Modern Photoelectric Detection Technology and InstrumentChongqing Key Laboratory of Fiber Optic Sensor and PhotodetectorChongqing University of TechnologyChongqing 400054China School of Chemistry and Chemical Engineering Chongqing University of TechnologyChongqing 400054China

A novel solid-liquid-core fiber-optic biosensor was fabricated for highly sensitive and selective detection of 4-chlorophenol in water.The sensor comprised horseradish peroxidase(HRP)-coated U-shaped liquidcore optical fiber(LCOF)and 4-chlorophenol permselective polymer membrane.The U-shaped LCOF was flled with ethanol suspension of SiO_(2)particles and the polymer membrane was composed of molecularly imprinted polymer,sulfonated polyethersulfone,and polysulfone.The morphology,composition,and surface luminous properties of the sensing region were examined.The effects of the diameter and content of SiO_(2)particles and temperature of 4-chlorophenol solutions on the sensitivity of the biosensors were investigated.Further,the sensitivity,selectivity,response time,and limit of detection(LOD)of the biosensors was investigated.In addition,the effects of fiber core materials on the light transmission in sensing region were investigated and a biosensor sensing model was established.The proposed sensor exhibited high selectivity for 4-chlorophenol with satisfactory sensitivity,LOD,and response time:-1.18(μg/L)^(-1),30μg/L,and 400 s,respectively.The results are expected to aid in the development of methods for enhancing sensitivity of fiber-optic sensors and surface luminous intensity of optical fibers.

关键词： 4-Chlorophenol Solid-liquid-core optical fiber Horseradish peroxidase Permselective polymermembrane Sensitivity Selectivity

Land-surface processes and summer-cloud-precipitation characteristics in the Tibetan Plateau and their effects on downstream weather: a review and perspective

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National Science Review 2020年第3期7卷 500-515页

作者： Yunfei Fu Yaoming Ma Lei zhong Yuanjian Yang Xueliang Guo Chenghai Wang xiaofeng Xu Kun Yang Xiangde Xu Liping Liu Guangzhou Fan Yueqing Li Donghai Wang Chengdu University of Information Technology Institute of Plateau Meteorology CMA School of Atmospheric Sciences Sun Yat-sen University School of Earth and Space Sciences University of Science and Technology of China Key Laboratory of Tibetan Environment Changes and Land Surface Processes Institute of Tibetan Plateau ResearchChinese Academy of Sciences CAS Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of Sciences University of Chinese Academy of Sciences CAS Center for Excellence in Comparative Planetology School of Atmospheric Physics Nanjing University of Information Science and Technology State Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences China Meteorological Administration School of Atmospheric Sciences Lanzhou University Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System Science Tsinghua University

Correct understanding of the land-surface processes and cloud-precipitation processes in the Tibetan Plateau(TP) is an important prerequisite for the study and forecast of the downstream activities of weather systems and one of the key points for understanding the global atmospheric movement. In order to show the achievements that have been made, this paper reviews the progress on the observations for the atmospheric boundary layer, land-surface heat fluxes, cloud-precipitation distributions and vertical structures by using ground-and space-based multiplatform, multisensor instruments and the effect of the cloud system in the TP on the downstream weather. The results show that the form drag related to the topography, land–atmosphere momentum and scalar fluxes is an important part of the parameterization process. The sensible heat flux decreased especially in the central and northern TP caused by the decrease in wind speeds and the differences in the ground-air temperatures. Observations show that the cloud and precipitation over the TP have a strong diurnal variation. Studies also show the compressed-air column in the troposphere by the higher-altitude terrain of the TP makes particles inside clouds vary at a shorter distance in the vertical direction than those in the non-plateau area so that precipitation intensity over the TP is usually small with short duration, and the vertical structure of the convective precipitation over the TP is obviously different from that in other regions. In addition, the influence of the TP on severe weather downstream is preliminarily understood from the mechanism. It is necessary to use model simulations and observation techniques to reveal the difference between cloud precipitation in the TP and non-plateau areas in order to understand the cloud microphysical parameters over the TP and the processes of the land boundary layer affecting cloud, precipitation and weather in the downstream regions.

关键词： Tibetan Plateau land-surface processes cloud-precipitation characteristics downstream effects

Vibration Absorption Efficiency and Higher Branches Elimination of Variable-Stiffness Nonlinear Energy Sink

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Journal of Harbin Institute of Technology(New Series) 2020年第1期27卷 76-84页

作者： Rui zhong Jian’en Chen Weimin Ge Jun Liu xiaofeng Wang Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System Tianjin University of TechnologyTianjin 300384China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin University of TechnologyTianjin 300384China

Vibration absorption efficiency of a variable⁃stiffness nonlinear energy sink(NES)was investigated when the main oscillator was subjected to harmonic and impulse excitations.The slow flow equations of the coupled system were derived by using the complexification⁃averaging method,and the nonlinear equations which describe the steady⁃state response were obtained.As the harmonic excitation force increased,the system which comprises constant⁃stiffness NES generated higher branch responses,greatly reducing the vibration absorption efficiency.The influence of nonlinear stiffness on the responses of the system was investigated.Results show that,with the increase of harmonic exciting force,a reduction of NES stiffness can eliminate the higher branch responses and even the frequency band of strongly modulated responses.The vibration absorption efficiency of variable⁃stiffness NES attached to the linear oscillator for different amplitudes of impulse excitation was investigated.Results show that the proper reduction of nonlinear stiffness under increasing impulse excitation can greatly increase the vibration absorption efficiency of NES,and the variable⁃stiffness design can effectively mitigate the negative influences of the increase of the excitation amplitude on the efficiency of constant⁃stiffness NES.

关键词： nonlinear energy sink efficiency variable⁃stiffness vibration suppression higher branch

Inulin Can Alleviate Metabolism Disorders in ob/ob Mice by Partially Restoring Leptinrelated Pathways Mediated by Gut Microbiota

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Genomics, Proteomics & Bioinformatics 2019年第1期17卷 64-75页

作者： xiaofeng Song Liang zhong Na Lyu Fei Liu Boxing Li Yanan Hao Yong Xue Jing Li Yuqing Feng Yue Ma Yongfei Hu Baoli Zhu CAS Key Laboratory of Pathogenic Microbiology and Immunology Institute of Microbiology Chinese Academy of Sciences Savaid Medical School University of Chinese Academy of Sciences Beijing Key Laboratory of Microbial Drug Resistance and Resistome College of Food Science and Nutritional Engineering China Agricultural University State Key Laboratory of Animal Nutrition College of Animal Science and Technology China Agricultural University Department of Pathogenic Biology School of Basic Medical Sciences Southwest Medical University

Inulin has been used as a prebiotic to alleviate glucose and lipid metabolism disorders in mice and humans by modulating the gut microbiota. However, the mechanism underlying the alleviation of metabolic disorders by inulin through interactions between the gut microbiota and host cells is unclear. We use ob/ob mice as a model to study the effect of inulin on the cecal microbiota by16 S rRNA gene amplicon sequencing and its interaction with host cells by transcriptomics. The inulin-supplemented diet improved glucose and lipid metabolism disorder parameters in ob/ob mice,alleviating fat accumulation and glucose intolerance. The a diversity of gut microbial community of ob/ob mice was reduced after inulin treatment, while the b diversity tended to return to the level of wild type mice. Interestingly, Prevotellaceae UCG 001(family Prevotellaceae) was obviously enriched after inulin treatment. A comparative analysis of the gene expression profile showed that the cecal transcriptome was changed in leptin gene deficiency mice, whereas the inulin-supplemented diet partially reversed the changes in leptin gene-related signaling pathways, especially AMPK signaling pathway, where the levels of gene expression became comparable to those in wild type mice.Further analysis indicated that Prevotellaceae UCG 001 was positively correlated with the AMPK signaling pathway, which was negatively correlated with markers of glycolipid metabolism disorders. Our results suggest that the inulin-supplemented diet alleviates glucose and lipid metabolism disorders by partially restoring leptin related pathways mediated by gut microbiota.

关键词： Prebiotics Gut microbiota Obesity Transcriptome Metabolic disorders

Extraction of Cr(Ⅵ) from chromite ore processing residue via hydrothermal-assisted phase transformation

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Chinese Chemical Letters 2020年第7期31卷 1956-1960页

作者： xiaofeng Mo Jin Zhou Le Lin Zuqi zhong Shaohua Yang Xueming Liu Zhenqing Shi Dongye Zhao Zhang Lin The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters(Ministry of Education) School of Environment and EnergySouth China University of TechnologyGuangzhou 510006China Sino-Singapore International Joint Research Institute Sino-Singapore Guangzhou Knowledge CityGuangzhou 510006China Environmental Engineering Program Department of Civil EngineeringAuburn UniversityAuburn AL 36849United States

The effective extracting Cr(Ⅵ) from chromite ore processing residue(COPR) is the key to achieve COPR detoxification and recovery.We developed an effective method to extract Cr(Ⅵ) from COPR via controlling the phase transformation of Cr(Ⅵ)-containing minerals.Characteristic analysis showed that Cr(Ⅵ) was mainly incorporated in the hydrocalumite(NaCa4Al2O6(SO4/CrO4)1.5-15H2O) in COPR,which was a layered-double hydroxide(LDH) with multilayer structure.In the hydrothermal treatment experiments,the Na2CO3 solution showed significant extraction effect of Cr(Ⅵ) and detoxification effect of COPR.After treatment,95% of Cr(Ⅵ) was removed and the Cr(Ⅵ) concentration in the leachate was decreased to 1.6 mg/L by the toxicity characteristic leaching procedure(TCLP),within the regulatory limit disposal standard(HJ/T 301-2007,3 mg/L).Further study revealed that,during the treatment,hydrocalumite transformed into calcite(CaCO3) under the effect of mineralizer,therefore,the layered structure collapsed and the incorporated Cr(Ⅵ) was released to the supernatant.Meanwhile,the Cr(Ⅵ)desorbed from calcite with the calcite particles grew into large size with smooth surface.Stir-flow experiment revealed that the amount of chromium released from CORP to the environment was significantly reduced after treatment,and it is safer for landfill disposal.This work will provide an instructive guidance for the detoxification and recovery of COPR.

关键词： Chromite ore processing residue Hexavalent chromium extraction Hydrothermal mineralization Phase transformation

Hypercompact CRISPR–Cas12j2 (CasF) enables genome editing, gene activation, and epigenome editing in plants

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Plant Communications 2022年第6期3卷 131-134页

作者： Shishi Liu Simon Sretenovic Tingting Fan Yanhao Cheng Gen Li Aileen Qi Xu Tang Yang Xu Weijun Guo Zhaohui zhong Yao He Yanling Liang Qinqin Han Xuelian Zheng xiaofeng Gu Yiping Qi Yong Zhang Department of Biotechnology School of Life Sciences and TechnologyCenter for Informational BiologyUniversity of Electronic Science and Technology of ChinaRoom 216Main BuildingNo.4Section 2North Jianshe RoadChengdu 610054China Department of Plant Science and Landscape Architecture University of MarylandCollege ParkMD 20742USA Biotechnology Research Institute Chinese Academy of Agricultural SciencesBeijing 100081China Institute for Bioscience and Biotechnology Research University of MarylandRockvilleMD 20850USA

CRISPR-Cas9,-Cas12a,-Cas12b,and-Cas13 have been harnessed for genome engineering in human and plant cells(Liu et al.,2022).However,the large size of these Cas proteins(e.g.190 kDa for SpCas9)makes them difficult to deliver into cells via a viral vector.The development of smaller Cas proteins will lead to reduced viral vector sizes that can be more widely adopted in versatile genome engineering systems.Recently,a CRISPR-Cas12j2(CasF)system was discovered in huge phages and developed into a hypercompact genome editor due to the small size of Cas12j2(80 kDa)(Pausch et al.,2020).Unfortunately,the gene editing efficiency of Cas12j2 in Arabidopsis protoplasts using ribonucleoprotein delivery was less than one percent(Pausch et al.,2020).Further optimization of this system is clearly required if CRISPR-Cas12j2-mediated editing in plant genomes is to be adopted by the plant sciences community.

关键词： CRISPR activation system

酰基氧化膦类光引发剂(TMO)的绿色合成及其对油墨深层固化的影响

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涂料工业 2023年第2期53卷 32-36页

作者：钟晓锋吴进汪瑾上海飞凯材料科技股份有限公司上海201908 合肥工业大学合肥230009

以二(对甲苯基)氧化膦和2,4,6-三甲基苯甲酰氯为原料合成了2,4,6-三甲基苯甲酰基-二甲苯基氧化膦(TMO),合成路线环保,产物纯度高、产率高。测试其光物理和化学性能,并将其应用于油墨体系,研究其光固化动力学,建立固化动力学模型,并与2,4... 详细信息

以二(对甲苯基)氧化膦和2,4,6-三甲基苯甲酰氯为原料合成了2,4,6-三甲基苯甲酰基-二甲苯基氧化膦(TMO),合成路线环保,产物纯度高、产率高。测试其光物理和化学性能,并将其应用于油墨体系,研究其光固化动力学,建立固化动力学模型,并与2,4,6-三甲基苯甲酰基-二苯基氧化膦(TPO)进行对比。结果表明:TMO的光吸收性能、光聚合活性、深层固化性能均优于TPO。1-羟基-环己基苯甲酮(184)与TMO复配使用可提高TMO的光敏性及深层固化特性。

关键词：酰基氧化膦光引发剂固化深度双键转化率油墨