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Effect of curing humidity on performance of cemented paste backfill

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International Journal of Minerals,Metallurgy and Materials 2020年第8期27卷 1046-1053页

作者： Di Wu run-kang zhao Chao-wu Xie Shuai Liu School of Energy and Mining Engineering China University of Mining and Technology-BeijingBeijing 100083China

Cemented paste backfill(CPB),a mixture of tailings,binder,and water,is widely and extensively used for the recovery of mineral resources,the prevention of ground subsidence,and the management of mine *** installed,the CPB is subjected to complex environmental conditions such as water content,temperature,and power,which have a significant impact on its ***,this study conducts a series of laboratory programs,including investigation of moisture,temperature,stress–strain relation,and microstructure to show the effect of curing humidity on the CPB *** results obtained indicate that ambient humidity can have a dramatic effect on CPB in terms of its macro performance of internal relative humidity,temperature and strength,as well as the micro *** examples of these effects on CPB include an increase in curing humidity,which favors binder hydration,and then an increase in hydration materials,temperature and peak stress in the *** results obtained will lead to a better understanding of CPB’s responses to various environmental conditions.

关键词： cemented paste backfill curing humidity temperature microstructure

Stem cell therapy for COVID-19 and other respiratory diseases:Global trends of clinical trials

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World Journal of Stem Cells 2020年第6期12卷 471-480页

作者： Hong-Long Ji Cong Liu run-Zhen zhao Department of Cellular and Molecular Biology University of Texas Health Science Centre at TylerTylerTX 75708United States Texas Lung Injury Institute University of Texas Health Science Centre at TylerTylerTX 75708United States School of Medicine Southern University of Science and TechnologyShenzhen 518000Guangdong ProvinceChina

Respiratory diseases,including coronavirus disease 2019 and chronic obstructive pulmonary disease(COPD),are leading causes of global *** are no effective and curative treatments,but supportive care *** therapy is a promising therapeutic strategy for refractory and unmanageable pulmonary illnesses,as proved by accumulating preclinical *** cells consist of totipotent,pluripotent,multipotent,and unipotent cells with the potential to differentiate into cell types requested for *** stromal cells,endothelial progenitor cells,peripheral blood stem cells,and lung progenitor cells have been applied to clinical *** date,the safety and feasibility of stem cell and extracellular vesicles administration have been confirmed by numerous phase I/II trials in patients with COPD,acute respiratory distress syndrome,bronchial dysplasia,idiopathic pulmonary fibrosis,pulmonary artery hypertension,and *** routes and a series of doses have been tested for tolerance and advantages of different *** this review,we systematically summarize the global trends for the cell therapy of common airway and lung diseases registered for clinical *** future directions for both new clinical trials and preclinical studies are discussed.

关键词： Pulmonary diseases COVID-19 Cell therapy Exosomes Clinical trial

Cyclic Ether Contaminant Removal from Water Using Nonporous Adaptive Pillararene Crystals via Host-Guest Complexation at the Solid-Solution Interface

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Research 2019年第1期2019卷 981-990页

作者： Yujuan Zhou Kecheng Jie run zhao Errui Li Feihe Huang State Key Laboratory of Chemical Engineering Center for Chemistry of High-Performance&Novel MaterialsDepartment of ChemistryZhejiang UniversityHangzhou 310027China

Te removal of soluble cyclic ether contaminants,such as dioxane and THF,produced in industrial chemical processes from water is of great importance for environmental protection and human *** we report that nonporous adaptive crystals of perethylated pillar[5]arene(EtP5)and pillar[6]arene(EtP6)work as adsorbents for cyclic ether contaminant removal via hostguest complexation at the solid-solution *** EtP6 crystals have the ability to adsorb dioxane from water with the formation of 1:2 host-guest complex crystals,while EtP5 crystals ***,both guest-free EtP5 and EtP6 crystals remove THF from water with EtP5 having a better *** is because EtP5 forms a 1:2 host-guest complex with THF via host-guest complexation at the solid-solution interface while EtP6 forms a 1:1 host-guest complex with ***6 also shows the ability to selectively remove dioxane from water even in the presence of ***,the reversible transitions between nonporous guestfree EtP5 and EtP6 structures and guest-loaded structures make them highly recyclable.

关键词： porous remove adsorbent

Analysis of Energy Saving Reconstruction of Existing Campus Dormitories in Chongqing——Taking Dormitory Six on Campus B of Chongqing University as An Example

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Journal of Harbin Institute of Technology(New Series) 2014年第4期21卷 96-102页

作者： Wen-Jing Dong Tie-Jun Zhou run-zhao Qi Chongqing University Faculty of Architecture and Urban Planning Key Laboratory of New Technology for Construction of Cities in Mountain Area

At present,a large number of historic buildings on campus are lack of energy-saving measures from the design time,especially the dormitories. And the reconstruction mostly focuses on functional reorganization or furniture replacement. However,energy efficiency design has not been paid enough attention,which leads to the high building energy consumption and the harsh physical environment. Based on the analysis of climatic characteristics of Chongqing area,taking Dormitory Six on campus B of Chongqing University as an example,the reconstruction of rooms on the top floor and West end are focused to guarantee the equal benefits of the dormitory environment. Through the simulation analysis of the software, on the basis of energy saving reconstruction of common maintenance structure,this thesis discusses the energy saving reconstruction methods and strategies of the existing campus dormitories,which are more suitable for the existing campus dormitories in Chongqing area.

关键词： campus dormitories in Chongqing energy-saving reconstruction optimization reconstruction design planted roof greening of West walls

Ceramic-based meta-material absorber with high-temperature stability

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Rare Metals 2024年第9期43卷 4433-4440页

作者： Xing-Cong Chen Wei-Jia Luo run-Ni zhao Yong-Zheng Wen Ji Zhou State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

With the continuous exploration of uncharted and extreme environments,enhanced temperature robustness of passive devices has become particularly *** this study,a ceramic-based meta-material absorber with exceptional temperature stability is developed using a fusion design approach that combines rare metal-based tungsten bronze structural ceramics and ***,the absorbance of the meta-material array based on Mie resonance exceeds 49.0%in both waveguides and free space,approaching the theoretical *** to impedance analysis,the absorption performance can be distinctly correlated with the dielectric loss(Q_(f)).Notably,the high-temperature robustness is verified to still be effective at 400℃.These advancements in our design allow for the use of monolithic materials in fabricating temperature-stable perfect absorbers,providing greater freedom in the dielectric performance and expanding their potential applications,including in space exploration and 5G millimeter-wave scenarios.

关键词： Temperature robustness Meta-material absorber Microwave absorption Rare metal-based ceramics Miniaturization

Fluorescent Supramolecular Polymersomes Based on Pillararene/Paraquat Molecular Recognition for pH-controlled Drug Release

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Chinese Journal of Polymer Science 2020年第1期38卷 1-8,I0004页

作者： run zhao Yu-Juan Zhou Ke-Cheng Jie Jie Yang Sebastien Perrier Fei-He Huang State Key Laboratory of Chemical Engineering Center for Chemistry of High-Performance&Novel MaterialsDepartment of ChemistryZhejiang UniversityHangzhou 310027China Department of Chemistry The University of WarwickCoventry CV47ALUK Faculty of Pharmacy and Pharmaceutical Sciences Monash University381 Royal ParadeParkvilleVIC3052Australia Warwick Medical School The University of WarwickCoventry GV47ALUK

Researchers have put significant efforts on developing versatile fluorescent polymeric systems due to their promising biological/biomedical labelling, tracking, monitoring, imaging, and diagnostic applications. However, complicated organic/polymeric synthesis or post-modification of these functionalized platforms is still a big obstacle for their further application and thereby provides clear motivation for exploring alternative strategies for the design and fabrication of easily available fluorescent systems. The marriage of supramolecular polymers and fluorescent imaging can provide a facile and dynamic manner instead of tedious and time-consuming synthesis due to the dynamic and reversible nature of noncovalent interactions. Herein, based on water-soluble pillararene/paraquat molecular recognition, we successfully prepare two amphiphilic polypseudorotaxanes which can self-assemble into supramolecular polymersomes in water. These polymersomes can be reversibly destroyed and reformed by tuning the solution p H. Attributed to the aggregation-induced emission of tetraphenylethylene groups,intense fluorescence can be introduced into the obtained supramolecular polymersomes. Furthermore, p H-triggered release of an encapsulated water-insoluble drug(doxorubicin) from the self-assembled fluorescent supramolecular polymersomes is also investigated.

关键词： Fluorescent polymers Aggregation-induced emission Host-guest interactions Responsiveness

Risk factors for early rebleeding and mortality in acute variceal hemorrhage

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World Journal of Gastroenterology 2014年第47期20卷 17941-17948页

作者： Jing-run zhao Guang-Chuan Wang Jin-Hua Hu Chun-Qing Zhang Department of Gastroenterology Shandong Provincial Hospital Affiliated to Shandong University Department of Gastroenterology Liaocheng People’s Hospital

AIM: To investigate the risk factors for 6-wk rebleeding and mortality in acute variceal hemorrhage (AVH) patients treated by percutaneous transhepatic variceal embolization (PTVE).

关键词： Acute variceal hemorrhage Percutaneous transhepatic variceal embolization Hepatic vein pressure gradient

Improved electrical and magnetic transport properties of La(0.8)Ba(0.2)MnO3 thin films by oxygen annealing

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Science China(Physics,Mechanics & Astronomy) 2016年第7期59卷 88-89页

作者： XiaoXia Chen GuoZhen Liu Xia Zhu Jie Qiu JinLei Yao Meng zhao YuCheng Jiang run zhao Ju Gao Research Center for Solid State Physics and Materials School of Mathematics and Physics Suzhou University of Science and Technology Suzhou 215009 China

Dear Editors, The properties of mixed-valence manganites are sensmve to the synthesis conditions [ 1 ]. For oxide films grown by pulsed laser deposition （PLD）, the physical properties are affected obviously by the growth oxygen pressure and annealing treat- ment [2-5]. Using the PLD method, manganite oxides are usually grown at different oxygen pressures to investigate the effects of oxygen content on their properties. However,

关键词：氧化物薄膜锰氧化物输运性质退火处理 PLD方法脉冲激光沉积合成条件混合价态

Rapid development methodology of agricultural robot navigation system working in GNSS-denied environment

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Advances in Manufacturing 2023年第4期11卷 601-617页

作者： run-Mao zhao Zheng Zhu Jian-Neng Chen Tao-Jie Yu Jun-Jie Ma Guo-Shuai Fan Min Wu Pei-Chen Huang School of Mechanical Engineering Zhejiang Sci-Tech UniversityHangzhou310018People’s Republic of China Key Laboratory of Transplanting Equipment and Technology of Zhejiang ProvinceHangzhou310018People’s Republic of China School of Transportation Zhejiang Industry Polytechnic CollegeShaoxing312000ZhejiangPeople’s Republic of China College of Automation Zhongkai University of Agriculture and EngineeringGuangzhou510225People’s Republic of China

Robotic autonomous operating systems in global n40avigation satellite system(GNSS)-denied agricultural environments(green houses,feeding farms,and under canopy)have recently become a research hotspot.3D light detection and ranging(LiDAR)locates the robot depending on environment and has become a popular perception sensor to navigate agricultural robots.A rapid development methodology of a 3D LiDAR-based navigation system for agricultural robots is proposed in this study,which includes:(i)individual plant clustering and its location estimation method(improved Euclidean clustering algorithm);(ii)robot path planning and tracking control method(Lyapunov direct method);(iii)construction of a robot-LiDAR-plant unified virtual simulation environment(combination use of Gazebo and SolidWorks);and(vi)evaluating the accuracy of the navigation system(triple evaluation:virtual simulation test,physical simulation test,and field test).Applying the proposed methodology,a navigation system for a grape field operation robot has been *** virtual simulation test,physical simulation test with GNSS as ground truth,and field test with path tracer showed that the robot could travel along the planned path quickly and *** maximum and mean absolute errors of path tracking are 2.72 cm,1.02 cm;3.12 cm,1.31 cm,respectively,which meet the accuracy requirements of field operations,establishing the effectiveness of the proposed *** proposed methodology has good scalability and can be implemented in a wide variety of field robot,which is promising to shorten the development cycle of agricultural robot navigation system working in GNSS-denied environment.

关键词： Agricultural robot Global navigation satellite system(GNSS)-denied environment Navigation system 3D light detection and ranging(LiDAR) Rapid developing Methodology