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Frontiers of Chemical Science and Engineering 2023年第7期17卷 930-941页

作者： Guodong tian Chao Duan Bingxu Zhou chaochao tian Qiang Wang Jiachuan Chen State Key Laboratory of Biobased Material and Green Papermaking Qilu University of TechnologyShandong Academy of SciencesJinan 250353China College of Bioresources Chemical and Materials Engineering Shaanxi University of Science and TechnologyXi’an 710021China

Membrane technology for wastewater remediation has aroused wide interest owing to its unique properties and potential ***,it remains challenging to explore green,efficient and robust membrane material and technique for complex wastewater ***,we proposed using a simple electrospinning and in situ seeding method to fabricate a lignin-based electrospun nanofiber membrane(LENM)decorated with photo-Fenton Ag@MIL-100(Fe)heterojunctions for efficient separation of oil/water emulsions and degradation of organic *** to the embedded lignin in LENM,an ultrahigh MIL-100(Fe)loading(53 wt%)with good wettability and high porosity was *** a result,the hybrid Ag@MIL-100(Fe)/LENM exhibited excellent oil/water emulsions separation efficiency(more than 97%)without a compromise of water ***,the hybrid membrane showed an excellent dye removal with degradation of 99%methylene blue within 30 min under illumination,which is attributed to a synergy of dye adsorption/enrichment and photo-Fenton catalytic degradation from Ag@MIL-100(Fe).Therefore,the lignin-based photo-Fenton hybrid membrane can lay the foundation for the preparation and application of green,sustainable and versatile membrane materials and technologies for efficient complex wastewater remediation.

关键词： lignin electrospinning heterojunctions photo-Fenton catalysis wastewater remediation

黄陵一号煤矿814工作面采前防治水安全评价

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陕西煤炭 2024年第10期43卷 91-95页

作者：贾继平李赵岩李涛田超超陕西陕煤黄陵矿业有限公司陕西延安727307 陕西瑞能煤业有限责任公司陕西延安727307

工作面采前防治水安全评价是落实煤矿防治水效果评价要求的重要内容,其评价结论是支撑工作面是否具备安全开采条件的理论依据,对保障工作面安全开采具有重要的理论和现实意义。为进一步健全工作面采前防治水安全评价体系,凸显其保障工... 详细信息

工作面采前防治水安全评价是落实煤矿防治水效果评价要求的重要内容,其评价结论是支撑工作面是否具备安全开采条件的理论依据,对保障工作面安全开采具有重要的理论和现实意义。为进一步健全工作面采前防治水安全评价体系,凸显其保障工作面安全回采的重要的理论支撑和指导作用,以黄陵一号煤矿814工作面为研究对象,结合矿井水文地质条件,客观分析了顶板直罗组下段砂岩裂隙水是影响工作面回采安全的主要水害因素。按照物探先行、钻探验证的治灾思路,有针对性地提出井下物探与钻探相结合的治理设计方案,采用“动、静态水结合法”工作面回采阶段涌水量情况进行了分析预测,为进一步完善工作面排水系统提供了参考依据。对已施工的井下物探探查、钻孔疏放水、排水系统建设等防治水工作进行效果评价,在做好工作面回采过程中采空区涌水量动态监测监控,工作面排水系统正常有效运行,准备好水害应急预案措施的前提下,工作面具备开采的水文地质条件。结合实际开采情况,工作面回采期间基本无水,有力支撑了工作面采前防治水工作效果评价的可行性和有效性,以此为煤矿单位及其他生产建设单位水害治理效果评价提供参考和借鉴。

关键词：矿井水害治理水文地质涌水量预测富水异常区探放水效果

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瑞能煤矿密集孔预裂切顶留巷技术实践

陕西煤炭 2024年第6期43卷 114-117页

作者：袁红平何文帅田超超贺煜陕西瑞能煤业有限责任公司陕西延安727307

切顶卸压自动成巷技术中预裂切顶是无煤柱开采技术中重要的一环,预裂切顶效果是决定留巷质量的决定性因素之一。双向聚能爆破在预裂切缝中发挥了良好的作用,而免爆破预裂切缝成为了未来预裂切缝技术的发展趋势。在分析密集孔切顶留巷方... 详细信息

切顶卸压自动成巷技术中预裂切顶是无煤柱开采技术中重要的一环,预裂切顶效果是决定留巷质量的决定性因素之一。双向聚能爆破在预裂切缝中发挥了良好的作用,而免爆破预裂切缝成为了未来预裂切缝技术的发展趋势。在分析密集孔切顶留巷方法的基础上,通过施工一定直径、角度、深度和密度的连续孔,可以充分利用岩石的“抗压怕拉”特性,破坏岩体的连续性,使岩体抗弯强度进一步降低,从而在矿山压力的作用下,形成巷道与采空区间滑裂面,最终形成切缝线。经现场实践,采用密集孔进行预裂切缝的留巷效果较好。

关键词：切顶卸压沿空留巷预裂切缝密集孔无煤柱开采

中微量元素氨基酸螯合肥在辣椒上的应用效果研究

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现代农业科技 2024年第9期 63-65页

作者：展宗瑞李倩田超超高红兵兰州石化职业技术大学应用化学工程学院甘肃兰州730060

为验证新型中微量元素氨基酸螯合肥在辣椒上的应用效果,采用随机区组设计,研究了叶面喷施中微量元素氨基酸螯合肥对辣椒生长发育以及品质的影响。结果表明,叶面喷施4次中微量元素氨基酸螯合肥0.5 g/L的肥效明显,辣椒植株的株高达78.5 cm... 详细信息

为验证新型中微量元素氨基酸螯合肥在辣椒上的应用效果,采用随机区组设计,研究了叶面喷施中微量元素氨基酸螯合肥对辣椒生长发育以及品质的影响。结果表明,叶面喷施4次中微量元素氨基酸螯合肥0.5 g/L的肥效明显,辣椒植株的株高达78.5 cm;单果长达21.4 cm,增加14.44%;单果重40 g,增加25%;折合产量达26400 kg/hm2,增加30.05%;辣椒果实中的营养元素及维生素C含量明显提高。中微量元素氨基酸螯合肥具有促进辣椒光合作用和各种养分之间互补、平衡及协调的功能,能够提升辣椒产量及品质。

关键词：辣椒中微量元素氨基酸螯合肥生物学性状产量品质

不同工质对大型联合收割机余热回收的热力学性能

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农业工程学报 2018年第5期34卷 32-38页

作者：焦有宙田超超贺超李刚张全国河南农业大学机电工程学院生物质能源河南省协同创新中心农业部农村可再生能源新材料与装备重点试验室郑州450002

为了协同收集农作物联合收割机缸套循环水和烟气2种品位的余热,该文采用LR6A3L型号的内燃机进行试验,获得了在全负荷变速情况下的余热特性参数;选取2 200和1 700 r/min这2个试验工况点,采用工质R123、R245fa、R152a、R600和水建立了单... 详细信息

为了协同收集农作物联合收割机缸套循环水和烟气2种品位的余热,该文采用LR6A3L型号的内燃机进行试验,获得了在全负荷变速情况下的余热特性参数;选取2 200和1 700 r/min这2个试验工况点,采用工质R123、R245fa、R152a、R600和水建立了单种工质和2种工质分别协同收集2种品位余热的数学模型,并进行了热力学性能分析。结果表明:采用单种工质收集2种余热时,相同条件下,采用工质R245fa单位换热量所产生的?损最小,分别为0.122和0.129 k W;采用R152a和R1232分别收集缸套循环水和烟气2种余热,在相同条件下,吸收单位热量所产生的?损最低,分别为0.156和0.154 k W,且换热后产生的温升最高。研究结果可为联合收割机余热即时干燥粮食提供参考。

关键词：内燃机余热回收模型有机工质协同收集粮食干燥

A Blockchain-Based Access Control Scheme for Reputation Value Attributes of the Internet of Things

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Computers, Materials & Continua 2024年第1期78卷 1297-1310页

作者： Hongliang tian Junyuan tian College of Electrical Engineering Northeast Electric Power UniversityJilin132012China

The Internet of Things(IoT)access controlmechanism may encounter security issues such as single point of failure and data *** address these issues,a blockchain-based IoT reputation value attribute access control scheme is ***,writing the reputation value as an attribute into the access control policy,and then deploying the access control policy in the smart contract of the blockchain system can enable the system to provide more fine-grained access control;Secondly,storing a large amount of resources fromthe Internet of Things in Inter Planetary File System(IPFS)to improve system throughput;Finally,map resource access operations to qualification tokens to improve the performance of the access control *** simulation experiments based on the Hyperledger Fabric *** simulation experimental results,it can be seen that the access control system can achieve more fine-grained and dynamic access control while maintaining high throughput and low time delay,providing sufficient reliability and security for access control of IoT devices.

关键词： Blockchain IoT access control Hyperledger Fabric

Robust adaptive radar beamforming based on iterative training sample selection using kurtosis of generalized inner product statistics

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Journal of Systems Engineering and Electronics 2024年第1期35卷 24-30页

作者： tian Jing ZHANG Wei School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China National Key Laboratory of Electromagnetic Space Security Chengdu 610036China

In engineering application,there is only one adaptive weights estimated by most of traditional early warning radars for adaptive interference suppression in a pulse reputation interval(PRI).Therefore,if the training samples used to calculate the weight vector does not contain the jamming,then the jamming cannot be removed by adaptive spatial *** the weight vector is constantly updated in the range dimension,the training data may contain target echo signals,resulting in signal cancellation *** cope with the situation that the training samples are contaminated by target signal,an iterative training sample selection method based on non-homogeneous detector(NHD)is proposed in this paper for updating the weight vector in entire range *** principle is presented,and the validity is proven by simulation results.

关键词： adaptive radar beamforming training sample selection non-homogeneous detector electronic jamming jamming suppression

Transformer and GAN-Based Super-Resolution Reconstruction Network for Medical Images

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Tsinghua Science and Technology 2024年第1期29卷 197-206页

作者： Weizhi Du Shihao tian Arts&Sciences College Washington University in St.LouisSt.LouisMO 63130USA Department of Electric and Computing Engineering Cornell UniversityIthacaNY 14850USA

Super-resolution reconstruction in medical imaging has become more demanding due to the necessity of obtaining high-quality images with minimal radiation dose,such as in low-field magnetic resonance imaging(MRI).However,image super-resolution reconstruction remains a difficult task because of the complexity and high textual requirements for diagnosis *** this paper,we offer a deep learning based strategy for reconstructing medical images from low resolutions utilizing Transformer and generative adversarial networks(T-GANs).The integrated system can extract more precise texture information and focus more on important locations through global image matching after successfully inserting Transformer into the generative adversarial network for picture ***,we weighted the combination of content loss,adversarial loss,and adversarial feature loss as the final multi-task loss function during the training of our proposed model *** comparison to established measures like peak signal-to-noise ratio(PSNR)and structural similarity index measure(SSIM),our suggested T-GAN achieves optimal performance and recovers more texture features in super-resolution reconstruction of MRI scanned images of the knees and belly.

关键词： super-resolution image reconstruction Transformer generative adversarial network(GAN)

CCL9/CCR1 axis-driven chemotactic nanovesicles for attenuating metastasis of SMAD4-deficient colorectal cancer by trapping TGF-β

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Acta Pharmaceutica Sinica B 2024年第8期14卷 3711-3729页

作者： Boning Niu tianyi tian Lu Wang Yinmei tian tian tian Yuanyuan Guo Hu Zhou Zhiping Zhang Tongji School of Pharmacy Huazhong University of Science and TechnologyWuhan 430030China Department of Oncology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department of Pharmacy Liyuan HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China School of Pharmaceutical Sciences Fujian Provincial Key Laboratory of Innovative Drug Target ResearchHigh Throughput Drug Screening PlatformXiamen UniversityXiamen 361102China National Engineering Research Center for Nanomedicine Huazhong University of Science and TechnologyWuhan 430030China Hubei Engineering Research Centre for Novel Drug Delivery System Huazhong University of Science and TechnologyWuhan 430030China

SMAD4 deficiency in colorectal cancer(CRC)is highly correlated with liver metastasis and high mortality,yet there are few effective precision therapies ***,we show that CCR1^(+)-granulocytic myeloid-derived suppressor cells(G-MDSCs)are highly infiltrated in SMAD4-deficient CRC via CCL15/CCR1 and CCL9/CCR1 axis in clinical specimens and mouse models,*** excessive TGF-β,secreted by tumor-infiltrated CCR1^(+)-G-MDSCs,suppresses the immune response of cytotoxic T lymphocytes(CTLs),thus facilitating ***,we develop engineered nanovesicles displaying CCR1 and TGFBR2 molecules(C/T-NVs)to chemotactically target the tumor driven by CCL9/CCR1 axis and trap TGF-βthrough TGF-β-TGFBR2 specific *** C/T-NVs counteract CCR1^(+)-G-MDSC infiltration through competitive responding CCL9/CCR1 axis.C/T-NVs-induced intratumoral TGF-βexhaustion alleviates the TGF-β-suppressed immune response of ***,C/T-NVs attenuate liver metastasis of SMAD4-deficient *** further exploration,high expression of programmed cell death ligand-1(PD-L1)is observed in clinical specimens of SMAD4-deficient *** C/T-NVs with anti-PD-L1 antibody(aPD-L1)induces tertiary lymphoid structure formation with sustained activation of CTLs,CXCL13^(+)-CD4^(+)T,CXCR5^(+)-CD20^(+)B cells,and enhanced secretion of cytotoxic cytokine interleukin-21 and IFN-γaround tumors,thus eradicating metastatic *** strategy elicits pleiotropic antimetastatic immunity,paving the way for nanovesicle-mediated precision immunotherapy in SMAD4-deficient CRC.

关键词： SMAD4-deficient CRC Metastasis G-MDSCs TGF-β CCR1 TGFBR2

Capturing metal clusters at the strong-interaction region to reverse Ostwald ripening

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Science China Materials 2024年第4期67卷 1363-1364页

作者： Shuheng tian Ding Ma Beijing National Laboratory for Molecular Sciences New Cornerstone Science LaboratoryCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

High-temperature interactions induce sintering of metal nanoparticles(NPs) on heterogeneous catalyst surfaces, leading to reduced surface area and active site loss through Ostwald ripening [1]. This irreversible deactivation necessitates costly catalyst replacement, notably impacting metals like copper in hydrogenation and reforming reactions [2].

关键词： catalyst reforming irreversible