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Effect of microalloying on wettability and interface characteristics of Zr-based bulk metallic glasses with W substrate

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China Foundry 2024年第4期21卷 352-359页

作者： Zhen Zhang Lin-na Feng Jin-he Wang zheng-kun Li hua-meng Fu Hong Li zheng-wang Zhu Hai-feng Zhang School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China School of Metallurgy Northeastern UniversityShenyang 110004China

The infiltration casting method is widely employed for the preparation of ex-situ composite ***,the production of composite materials using this method must necessitates a comprehensive understanding of the wettability and interface characteristics between the reinforcing phase and the bulk metallic glasses(BMGs).This work optimized the composition of Zr-based BMGs through microalloying methods,resulting in a new set of Zr-based BMGs with excellent glass-forming *** experiments between the Zr-based BMGs melts and W substrates were conducted using the traditional sessile drop method,and the interfaces were characterized utilizing a scanning electron microscope(SEM)equipped with energy dispersive X-ray spectroscopy(EDS).The work demonstrates that the microalloying method substantially enhances the wettability of the Zr-based BMGs ***,the incorporation of Nb element impedes the formation of W-Zr phases,but the introduction of Nb element does not alter the extent of interdiffusion between the constituent elements of the amorphous matrix and W element,indicating that the influence of Nb element on the diffusion of individual elements is minute.

关键词： Zr-based BMGs infiltration casting method wettability interface characteristics W-Zr phases

Conditioning treatments mitigate the levels of fecal pollution indicators in soil during land-application of sewage sludge

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Science China Technological Sciences 2024年第10期67卷 3091-3102页

作者： WANG YuHang LI hua FANG WenHao WANG Ru WANG XinXin zheng GuanYu ZHOU LiXiang Department of Environmental Engineering College of Resources and Environmental SciencesNanjing Agricultural University College of Materials and Chemical Engineering Pingxiang University Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization

Sewage sludge is a major source of fecal pathogens in the environment, and its application to land can result in a significant release of these pathogens into the soil. While conditioning treatments are crucial for improving the dewatering process of sludge, their impact on the presence and behavior of fecal pathogens in soil remains unclear. This study aims to assess four extraction methods for recovering fecal pollution indicators from soil amended with unconditioned and conditioned sludge. The indicators include Escherichia coli(EC), human-specific HF183 Bacteroides(HF183), human adenovirus(HAdV), human BK polyomavirus(BKPyV), human JC polyomavirus(JCPyV), and cross-assembly phage(crAssphage). This study also examines how soil moisture content affects the decay of these fecal pollution indicators in soil amended with raw sludge and investigates the influence of conditioning treatments with cationic polyacrylamide(PAM), Fenton's reagents, Fe[Ⅲ]/CaO on their persistence in soil. The results indicated that the direct extraction method was the most effective and unbiased for recovering fecal pollution indicators from sludge-amended soil compared with the three elution-concentration methods. All fecal pollution indicators, except HAdV, remained stable under dry soil conditions, while high soil moisture content(48.39%-53.14%) slowed the decay rates of these indicators. During the application of sludge to soil, effective control of fecal pollution indicators was observed, with JCPyVand HAdV becoming undetectable within a short period. The log reduction values of HF183, BKPyV, and crAssphage ranged from 0.1 to 2.8 logs after 30 d of cultivation. The application of conditioned sludge, especially Fenton's reagent-conditioned sludge, resulted in a reduction in human fecal contamination in the receiving soil. Therefore, implementing appropriate conditioning methods, such as using Fenton's reagent, can effectively mitigate the health risks associated with fecal pathogens.

关键词： fecal pollution indicators sewage sludge conditioning treatment land application soil

Optimization and experimental analysis of sweet potato ship-shaped transplanting trajectory using particle swarm algorithm

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International Journal of Agricultural and Biological Engineering 2024年第3期17卷 100-107页

作者： zhengduo Liu Lin hua Zhaoqin Lyu Jiaji Hu Wenxiu zheng College of Mechanical and Vehicle Engineering West Anhui UniversityLu’an 237000AnhuiChina Traditional Chinese Medicine Institute of Anhui Dabie Mountain West Anhui UniversityLu’an 237012AnhuiChina College of Mechanical and Electronic Engineering Shandong Agricultural UniversityTai’an 271018ShandongChina Anhui zhengyang Machinery Technology Co. Ltd.Lu’an 237012AnhuiChina

The mechanization of ship-shaped transplanting is currently an urgent problem that should be *** movement trajectory of the transplanting mechanism is the key technology to perform ship-shaped *** this study,a ship-shaped transplanting trajectory was built and a mathematical model of a four-link transplanting mechanism was developed based on the requirements of the sweet potato transplanting agronomic *** particle swarm optimization algorithm was used,with the length of the four-bar mechanism and the installation angle of the fixed bar serving as the variables to *** objective was to minimize the deviation of the ship-shaped transplanting trajectory,yielding an iterative optimization *** MATLAB simulation results showed that the penalty factors of different proportions in the adaptive particle swarm optimization algorithm affected the transplanting *** optimal penalty factor parameters areα=0.6,β=*** ensure that the transplanting trajectory fulfills the agronomic requirements,and limit the deviation in the return trajectory of the *** sizes of the optimized four-bar mechanism were 110,312,245,160,360,and,160 *** determined installation angle was 100°.The results of the field experiments demonstrated that the optimized four-bar transplanting mechanism can better fulfill the agronomic technical requirements of sweet potato ship-shaped *** a transplanting speed of 0.2 m/s,the average qualified rates of insertion depth,insertion length,and tail height were equal to 94.00%,93.83%,and 91.67%.The results obtained in this study provide a theoretical basis and technical support for studying and developing sweet potato ship-shaped transplanting machinery.

关键词： sweet potato oblique insertion method mechanical arm particle swarm

The largest CPIES array in the marginal sea:abundant dynamics in the northeast South China Sea

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Acta Oceanologica Sinica 2024年第1期43卷 135-137页

作者： hua zheng Xiao-hua Zhu Min Wang Ruixiang Zhao Chuanzheng Zhang Feng Nan Fei Yu Institute of Polar and Ocean Technology Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China School of Oceanography Shanghai Jiao Tong UniversityShanghai 200030China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China National Marine Environmental Monitoring Center Dalian 116023China Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Laboratory for Ocean and Climate Dynamics Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China

The South China Sea(SCS)is a marginal sea connecting the Pacific and Indian oceans and has gained much attention in recent *** dynamics in the northeast SCS are considerably influenced by topography,monsoons,tropical ... 详细信息

关键词： northeast marginal abundant

Effect of Small Needle Knife on Autophagy and TGF-β in Synovial Fluid of KOA Rats

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Chinese Journal of Biomedical Engineering(English Edition) 2024年第1期33卷 33-39页

作者： zheng Kang-hua LIN Zeng-ping CHEN Yong Fujian Provincial 2nd People's Hospital Affiliated Hospital of Fujian University of Traditional Chinese MedicineFuzhou Fujian 350003China College of Integrative Chinese and Western Medicine Fujian University of Traditional Chinese MedicineFuzhou Fujian 350122China

Objective:To explore the effects of small needle knife on the autophagy function of synovium and the expression of TGF-βin synovial fluid of KOA rats,so as to provide a new theoretical basis for the treatment of ***:48 SD rats were randomly divided into blank control group,model group,drug group and acupotomy *** blank control group maintained the original feeding without any intervention,the model group adopted the sodium monoiodoacetate injection method to prepare the KOA rat model without any intervention,the drug group prepared the KOA rat model and then treated with tripterine by gavage,and the needle knife group treated the KOA rat model with small needle *** expression levels of autophagy-related proteins in synovial tissues were detected by immunohistochemistry and Western blotting,and the content of TGF-βin synovial fluid was measured by ***:Compared with the blank control group,Beclin-1,Caspase-3 and Bax were up-regulated and m TOR was down-regulated in the model ***-1,m TOR,Caspase-3 and Bax were up-regulated in the drug *** was no significant difference in the expression of autophagy-related proteins Beclin-1(0.28±0.09)and m TOR(0.45±0.12)between the acupotomy group and the blank control group,while Caspase-3(0.17±0.03)and Bax(0.30±0.01)were *** expression level of TGF-βin synovial fluid in the small needle knife group was(0.29±0.09),which was similar to that in the blank control group,and was significantly higher than that in the model ***:Small needle knife treatment can promote the recovery of synovial autophagy in KOA rats,and reduce the level of TGF-βin synovial fluid,and can play a clinical role in the treatment of KOA by regulating the expression of synovial autophagy and TGF-β.

关键词： small needle knife knee osteoarthritis(KOA) synovium autophagy transforming growth factorβ(TGF-β)

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The position of Cathaysia in Nuna and during the Nuna-Rodinia transition

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Science Bulletin 2024年第17期69卷 2693-2697页

作者： Chuan yang zheng-Xiang Li yang Li Xian-hua Li State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China Earth Evolution and Dynamics Research Center(EDRC) Laoshan LaboratoryQingdao 266237China Earth Dynamics Research Group(EDRG) School of Earth and Planetary SciencesCurtin UniversityPerth WA 6845Australia School of Earth and Space Sciences Peking UniversityBeijing 100871China State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China

The assembly and breakup of Nuna and Rodinia, two successive supercontinents in the Proterozoic, provide key evidence for the establishment of supercontinent cycles. Reliable palaeogeographic reconstructions at the cores of the two supercontinents are critical for understanding the evolution and geodynamics of the supercontinent cycles. In addition, there are fundamental aspects of the Nuna-Rodinia transition that remain poorly understood, including the ways in which Nuna broke up and Rodinia assembled, either through introversion [1] or extroversion [2].

关键词： continent Rodinia transition

A novel encoding mechanism for particle physics

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Nuclear Science and Techniques 2024年第8期35卷 153-166页

作者： Zhi‑Guang Tan Sheng‑Jie Wang You‑Neng Guo hua zheng Aldo Bonasera School of Electronic Information and Electrical Engineering Changsha UniversityChangsha 410003China School of Physics and Information Technology Shaanxi Normal UniversityXi’an 710119China Key Laboratory of Quark and Lepton Physics(MOE) Central China Normal UniversityWuhan 430079China Cyclotron Institute Texas A&M UniversityCollege StationTX 77843USA Laboratori Nazionali del Sud INFN95123 CataniaItaly

This study proposes a novel particle encoding mechanism that seamlessly incorporates the quantum properties of particles,with a specific emphasis on constituent *** primary objective of this mechanism is to facilitate the digital registration and identification of a wide range of particle *** design ensures easy integration with different event generators and digital simulations commonly used in high-energy ***,this innovative framework can be easily expanded to encode complex multi-quark states comprising up to nine valence quarks and accommodating an angular momentum of up to 99/*** versatility and scalability make it a valuable tool.

关键词： Multi-quark state Encoding mechanism Constituent quark Particle physics

Use of Magic Angle Spinning ~1H NMR Spectroscopy to Monitor Reactions in Solid-Phase Synthesis

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Chinese Chemical Letters 1997年第12期8卷 0-0页

作者： Ai Ming YU hua zheng yang(The State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071)Ping Chuan SUN Zhen Pu ZHANG Ming LI(The State Key Laboratory of Functional Polymeric Materials for Adsorption and Separation,Nankai Uni State Key Lab. Elemento-Organ. Chem. Nartkai University Tianjin 300071 China State Key Lab. Funct. P.M.A./S. Nankai University Tianjin 300071 China

Proton NMR-spectra of Wang resin bound compounds were obtained using the magic angle spinning 1HNMR technique with standard equipment. It was possible to analyse the spectra to evaluate their utility in solid-phase ch... 详细信息

关键词： NMR Spectroscopy to Monitor Reactions in Solid-Phase Synthesis Use of Magic Angle Spinning DCC DCM

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Chinese Journal of Integrative Medicine 2024年第8期30卷 684-691页

作者： CAO Wei WANG Lu HOU Ting-hui SHI Yun-zhou zheng Qian-hua zheng Hui ZOU Zi-hao QIN Di yang Qian CHEN Si-jue WANG Hai-yan XIAO Xian-jun LI Ying Department of Acupuncture and Moxibustion Chengdu University of Traditional Chinese MedicineChengdu610000China Acupuncture and Moxibustion School of Health Preservation and Rehabilitation Chengdu University of Traditional Chinese MedicineChengdu610000China

Objective: To explore the demographic and disease-related factors associated with acupuncture response in patients with chronic tension-type headache(CTTH). Methods: Using data from the randomized clinical trial(218 cases) consisting of 4 weeks of baseline assessment, 8 weeks of treatment, and 24 weeks of follow-up, participants were regrouped into responders(at least a 50% reduction in monthly headache days at week 16 compared with baseline) and non-responders. Twenty-three demographic and disease-related factors associated with acupuncture response in 183 participants were analyzed by multivariable logistic regression. Results: One hundred and nineteen(65.0%) participants were classified as responders. Four factors were significantly independently associated with acupuncture response, including treatment assignment, headache intensity at baseline, and 2 domains [general health(GH) and social functioning(SF)] from the 36-Item Short Form Health Survey quality of life questionnaire. Treatment assignment was associated with nonresponse: participants receiving true acupuncture were 3-time more likely to achieve a CTTH response than those receiving superficial acupuncture [odds ratio(OR) 0.322, 95% confidence interval(CI) 0.162 to 0.625, P=0.001]. Compared with patients with mild-intensity headache, patients with moderate-intensity headache were twice as likely to respond to acupuncture(OR 2.001, 95% CI 1.020 to 4.011, P=0.046). The likelihood of non-response increased by 4.5% with each unit increase in the GH grade(OR 0.955, 95% CI 0.917 to 0.993, P=0.024) while decreased by 3.8% with each unit increase in the SF grade(OR 1.038, 95% CI 1.009 to 1.069, P=0.011). Conclusions: Greater headache intensity, lower GH score, and higher SF score were associated with better acupuncture responses in CTTH patients. These 3 factors require independent validation as predictors of acupuncture effectiveness in CTTH.

关键词： acupuncture chronic tension-type headache logistic regression quality of life Chinese medicine