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Plastic Rooftop Rainwater Harvesting Technology in Arid Greenhouse Vegetable Cropping System in Anding, Gansu, China

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IOP Conference Series: Earth and Environmental Science 2021年第1期687卷

作者： Junde Wang Yanzhao Jin luwen zhou Gansu Research Institute for Water Conservancy Gansu Lanzhou 730000 China

Several greenhouse vegetable cropping models have been established to deal with the natural, arid, water deficit weather condition in Anding District. Irrigation requirement is computed based on various irrigation schemes. Rainwater harvesting technology is utilized to estimate the water collection amount with the greenhouse plastic rooftop using the water-balance rationale. Different water demand and runoff collection surface needs are determined based on the supplemental irrigation requirements of the various vegetable cropping models using regulatory benefit principle. The required capacity of rainwater storage is then evaluated for each cropping model. These results provide valuable references for rainwater harvesting technology using greenhouse plastic rooftop for agricultural production.

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Molecule dynamic simulation on the effect of lubricant on R32 during condensation

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INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER 2024年 156卷

作者： Qin, luwen Shen, Lidi Hu, Yuanyang zhou, Runfa Li, Shuhong Southeast Univ Sch Energy & Environm Nanjing 210096 Peoples R China China Telecom Corp Ltd Nanjing Branch Nanjing 210008 Peoples R China

Lubricant can improve the dynamic performance of the heat transfer surface and also have an adverse effect on the condensation heat transfer capacity of refrigerant. This paper studies the effect of adding different mass fractions of lubricant PEC4 molecules on the condensation process of refrigerant R32 using molecular dynamics simulation. The results show that the addition of lubricant can suppress the condensation process of refrigerant, and the condensation is more suppressed with the increase of lubricant mass fraction. All lubricant molecules are adsorbed on the copper plate to form an oil film, and increasing the heat transfer resistance at the liquid-solid interface. The temperature distribution along the condensation direction shows that copper atoms reach the given condensation temperature at the beginning of condensation, and temperature jump occurred at the liquidsolid interface. When the mass fraction of lubricating oil is 0 wt%, 4.58 wt%, 8.77 wt%, 12.61 wt%, the time required for the temperature of the fluid area to drop to the condensation temperature is 100 ps, 152 ps, 205 ps and 220 ps. Finally, the radial distribution function of R32 condensed on the surface of the copper plate shows that the R32 liquid phase conforms to the distribution law of fluid molecules with short-range order and longrange disorder.

关键词： Lubricating oil R32 Molecular dynamics Condensation

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Deciphering the NSP12/7/8 complex: Key insights into coronavirus replication and potential therapeutic targets

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MOLECULAR THERAPY NUCLEIC ACIDS 2025年第2期36卷 102505页

作者： Gao, luwen zhou, Liyan Rahman, Abdul Baloch, Zulqarnain Jiangxi Med Coll Shangrao Jiangxi Peoples R China Foshan Univ Guangdong Key Lab Food Intelligent Mfg Foshan Guangdong Peoples R China Foshan Univ Sch Food Sci & Engn Foshan Guangdong Peoples R China Kunming Univ Sci & Technol Fac Life Sci & Technol Kunming Peoples R China

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Microtubule-Mediated Wall Anisotropy Contributes to Leaf Blade Flattening

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CURRENT BIOLOGY 2020年第20期30卷 3972-+页

作者： Zhao, Feng Du, Fei Oliveri, Hadrien zhou, luwen Ali, Olivier Chen, Wenqian Feng, Shiliang Wang, Qingqing Lu, Shouqin Long, Mian Schneider, Rene Sampathkumar, Arun Godin, Christophe Traas, Jan Jiao, Yuling Univ Lyon Lab Reprod & Dev Plantes INRIA CNRSINRAEENS LyonUCB Lyon 1 F-69342 Lyon France Chinese Acad Sci Innovat Acad Seed Design Inst Genet & Dev Biol State Key Lab Plant Genom Beijing 100101 Peoples R China Chinese Acad Sci Innovat Acad Seed Design Natl Ctr Plant Gene Res Beijing Inst Genet & Dev Biol Beijing 100101 Peoples R China Ningbo Univ Sch Mech Engn & Mech Smart Mat & Adv Struct Lab Ningbo 315211 Zhejiang Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China Chinese Acad Sci Inst Mech Natl Micrograv Lab Key Lab MicrogravCtr Biomech & Bioengn Beijing 100190 Peoples R China Chinese Acad Sci Inst Mech Beijing Key Lab Engn Construct & Mechanobiol Beijing 100190 Peoples R China Max Planck Inst Mol Plant Physiol Muhlenberg 1 D-14476 Potsdam Germany

Plant organs can adopt a wide range of shapes, resulting from highly directional cell growth and divisions. We focus here on leaves and leaf-like organs in Arabidopsis and tomato, characterized by the formation of thin, flat laminae. Combining experimental approaches with 3D mechanical modeling, we provide evidence that leaf shape depends on cortical microtubule mediated cellulose deposition along the main predicted stress orientations, in particular, along the adaxial-abaxial axis in internal cell walls. This behavior can be explained by a mechanical feedback and has the potential to sustain and even amplify a preexisting degree of flatness, which in turn depends on genes involved in the control of organ polarity and leaf margin formation.

关键词： leaf flattening anisotropic growth cell wall cytoskeleton mechanical feedback 3D mechanical modeling organ polarity

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Energy consumption and size reduction of absorption refrigeration system by installing atomizer in absorber

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THERMAL SCIENCE AND ENGINEERING PROGRESS 2023年 41卷

作者： zhou, Runfa Qin, luwen Wang, Minqi Li, Shuhong Southeast Univ SEU Sch Energy & Environm Nanjing 210096 Peoples R China

Absorption refrigeration systems can be driven by low-grade heat sources to generate high-grade energy, but their applications are confined by large size and low energy efficiency. Enhanced absorption process can reduce the energy consumption and components size, and solution atomization technology can improve the absorption process by substantially enlarging the liquid-gas contact area. Nevertheless, the atomization process will consume electrical energy, and the enhancement in the absorption process comes at the atomizer energy consuming, so the comprehensive effects need to be clarified. To analyse the influence, a mathematical model is established based on the thermodynamic analysis. The modified energy efficiency and the exergy efficiency are employed to describe the energy consumption and irreversible loss, and the size decreasing ratio is used to measure the decreasing of the system size. After validating the reliability of the model by a built experimental system, the enhancement effects and influence factor are calculated by the model. The result shows that installing atomizer has positive effect on system performance, and it can reach a compactor and more efficient system. The energy consumption and irreversible loss can be decreased by 32.8% and 31.8%, and the size of the main components can be reduced by 10%. The influence of the droplets parameters are also analyzed. The higher atomization ratio is more effective to decrease the size of the system but no effects on the energy consumption and the irreversible loss. Moreover, there are optimized initial droplets velocity for different diameters.

关键词： Ammonia-water Absorption refrigeration Atomization Falling film absorber Energy efficiency

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Trends and patterns of antibiotic using from 2014 to 2018 in stomatology hospitals of China

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ORAL DISEASES 2025年第1期31卷 310-317页

作者： Guo, Zhigang zhou, Yue Fu, Mengyuan Zheng, Liguang Shi, luwen Peking Univ Sch & Hosp Stomatol Dept Pharm Beijing 100081 Peoples R China Natl Ctr Stomatol Beijing 100081 Peoples R China Natl Clin Res Ctr Oral Dis Beijing 100081 Peoples R China Natl Engn Lab Digital & Mat Technol Stomatol Beijing 100081 Peoples R China Peking Univ Peoples Hosp Dept Pharm Beijing 100044 Peoples R China Peking Univ Sch Pharmaceut Sci Beijing Peoples R China

Objective: To analyze trends of antibiotic consumption and expenditure in Chinese stomatology hospitals between 2014 and 2018 with a longitudinal study design, and show the impacts of the comprehensive policy on dental antibiotic use in China. Subject and Methods: Consumption was quantified as the number of daily defined doses (DDDs) and expenditure as the procurement costs, using medical institutions' drug procurement data from the Chinese Monitoring Network for Rational Use of Drugs. Descriptive statistics was employed and the compound annual growth rate (CAGR) was calculated to show the average annual growth rate. Results: Between 2014 and 2018, overall antibiotic consumption increased from 842.6 thousand DDDs to 1376.7 thousand DDDs (p < 0.001) and expenditure increased from 11.6 million RMB to 20.9 million RMB (p < 0.001), where other beta-lactam antibacterials accounted for the largest proportion of total consumption (37.1%-50.1%) and expenditure (52.9%-66.6%), and also increase the largest (CAGR = 18.4%, p < 0.001). The proportion of oral antibiotics was nearly 9 times of parenteral antibiotics in consumption (CAGR = 0.3%, p = 0.023) and only 2 times in expenditure (CAGR = -1.7%, p = 0.112). The non-restricted group accounted for more than 90% of consumption (CAGR = 0.6%, p < 0.001). In 2018, oral first-generation cephalosporins (22.8%), oral imidazole derivatives (22.3%), and oral second-generation cephalosporins (19.2%) were the most frequently used antibiotic classification, while parenteral second-generation cephalosporins were top one (19.8%) for expenditure. At chemical substance levels, the consumption of oral cefradine ranked top one (21.4%) and parenteral cefuroxime accounted for the largest proportion of expenditure (14.5%) in 2018. Oral cefradine, oral metronidazole, and oral cefaclor were the top three frequently consumed antibiotics throughout the five years. Conclusions: Despite the potential antibiotic overuse, the comprehensive antibiotic stew

关键词： antibiotic consumption antibiotic expenditure China dental maxillofacial stomatology

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Numerical and experimental studies on the carcass characteristics of a radial tire

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PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING 2024年第8期238卷 2133-2145页

作者： Qian, Chao Sun, Pengfei zhou, Shuiting Chen, luwen Su, Guoyun Sun, Xin Xiamen Univ Technol Sch Mech & Automot Engn Xiamen 361021 Fujian Peoples R China

In this research, the carcass characteristics of a radial tire were analyzed by performing numerical simulations on ABAQUS software based on the single factor control variable method, and the feasibility of the proposed numerical model was verified by executing experiments on a tire uniformity testing machine. It was found that when the tire crossed the bump, the preload had positive effects on the internal energies and friction-dissipation fluctuation of the tire, but had little influence on its kinetic energy fluctuation. Tire speed was positively correlated with the fluctuation of kinetic energy, but negatively correlated with the friction-dissipation fluctuation of the tire. In addition, there was a slight correlation between the speed and the internal energy fluctuation of the tire. Moreover, the change in the tire pressure had little influence on the kinetic energy, internal energy, and friction dissipation of the tire.

关键词： Transient response carcass characteristics radial tire ABAQUS bump

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Effects of tree species pore structure characteristics and CO2 activation on the performance of their derived carbon electrode for supercapacitors

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MATERIALS RESEARCH BULLETIN 2025年 182卷

作者： Wang, Qi Fan, luwen Sun, Jingru Tan, Zhenglin Mu, Jiajia zhou, Xiaoming Sheng, Lizhi Beihua Univ Coll Mat Sci & Engn Dept Mat Jilin 132013 Peoples R China Beihua Univ Wood Mat Sci & Engn Key Lab Jilin Prov Jilin 132013 Peoples R China Natl Univ Singapore Dept Mat Sci & Engn Singapore 117574 Singapore Beihua Univ Coll Sci Jilin 132013 Peoples R China

Herein, we investigated the effects of tree species selection on the specific surface area and electrochemical properties of wood-derived carbon electrodes. The SEM, Raman spectra and aperture distribution test results showed that compared with BCW and ZCW, CW had a more complex hierarchical porous structure and more defects. The N-2 adsorption/desorption isotherms and electrochemical test results showed that CW had the largest specific surface area and the best electrochemical performance, with a specific surface area of 495.3 m(2) g(-1) and an areal capacitance of 3079 mF cm(-2) at 5 mA cm(-2). The specific surface area and electrochemical properties of ACW, ABCW and AZCW electrodes obtained by CO2 activation were significantly improved compared with CW, BCW and ZCW electrodes. Among the activated electrodes, the ACW electrode had the highest specific surface area (558.4 m(2) g(-1)) and the highest areal capacitance (3727 mF cm(-2) at 5 mA cm(-2)).

关键词： Wood, Wood-derived carbon Activated carbonized wood Hierarchical porous structure Supercapacitor

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Simulation of dynamic changes in fluid parameters and flow patterns during condensation

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APPLIED THERMAL ENGINEERING 2023年第PartB期230卷

作者： Qin, luwen Shen, Lidi zhou, Runfa Hu, Yuanyang Li, Shuhong Southeast Univ Sch Energy & Environm Nanjing 210096 Peoples R China China Telecom Corp Ltd Nanjing Branch Nanjing 210008 Peoples R China

The three-dimensional numerical simulation of the R32 flow condensation is conducted in a circular microchannel with a hydraulic diameter of 1 mm, and the setting of two phase inlets is applied to the transient simulation. The temporal process of flow patterns, velocity contour and temperature contour are obtained for inlet vapor quality of 0.5 and mass flow rate of 100, 150 and 200 kg/(m(2)center dot s), respectively. The corresponding relationship between each flow pattern and its internal parameters along the flow direction during condensation are studied in detail. The fluid in the microchannel undergoes annular, slug, bubbly and shrinking bubbly flow in sequence. The fluctuations of wall shear stress (WSS) and turbulent intensity (TI) caused by the oscillation of velocity gradient are the most intense near the transition point of flow regimes. Revealing the relationship between WSS, TI and flow patterns is an excellent supplement to the existing condensation flow. The local heat flux reaches its extreme value at the head of downstream of the annular flow, injection flow and slug flow. Similarly, the fluid temperature fluctuates violently at the same location. The time-average heat transfer coefficient of annular flow is higher than that of other flow patterns, and the peak value of heat transfer coefficient is located at the head of annular flow downstream under different mass flow rates.

关键词： Condensation Flow pattern transition Microchannel Annular flow Vapor dryness

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Elucidating functional epitopes within the N-terminal region of malaria transmission blocking vaccine antigen Pfs230

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NPJ VACCINES 2022年第1期7卷 4页

作者： Miura, Kazutoyo Takashima, Eizo Pham, Thao P. Deng, Bingbing zhou, luwen Huang, Wei-Chiao Diouf, Ababacar Gebremicale, Yonas T. Tachibana, Mayumi Ishino, Tomoko Richter King, C. Lovell, Jonathan F. Long, Carole A. Tsuboi, Takafumi NIAID Lab Malaria & Vector Res NIH 12735 Twinbrook Pkwy Rockville MD 20852 USA Ehime Univ Div Malaria Res Proteosci Ctr Matsuyama Ehime 7908577 Japan Univ Buffalo State Univ New York Dept Biomed Engn Buffalo NY 14260 USA Ehime Univ Div Mol Parasitol Proteo Sci Ctr Toon Ehime 7910295 Japan PATHs Malaria Vaccine Initiat MVI Washington DC 20001 USA Tokyo Med & Dent Univ Grad Sch Med & Dent Sci Dept Environm Parasitol Tokyo Japan

Pfs230 is a leading malaria transmission blocking vaccine (TBV) candidate. Comprising 3135 amino acids (aa), the large size of Pfs230 necessitates the use of sub-fragments as vaccine immunogens. Therefore, determination of which regions induce functional antibody responses is essential. We previously reported that of 27 sub-fragments spanning the entire molecule, only five induced functional antibodies. A "functional" antibody is defined herein as one that inhibits Plasmodium falciparum parasite development in mosquitoes in a standard membrane-feeding assay (SMFA). These five sub-fragments were found within the aa 443-1274 range, and all contained aa 543-730. Here, we further pinpoint the location of epitopes within Pfs230 that are recognized by functional antibodies using antibody depletion and enrichment techniques. Functional epitopes were not found within the aa 918-1274 region. Within aa 443-917, further analysis showed the existence of functional epitopes not only within the aa 543-730 region but also outside of it. Affinity-purified antibodies using a synthetic peptide matching aa 543-588 showed activity in the SMFA. Immunization with a synthetic peptide comprising this segment, formulated either as a carrier-protein conjugate vaccine or with a liposomal vaccine adjuvant system, induced antibodies in mice that were functional in the SMFA. These findings provide key insights for Pfs230-based vaccine design and establish the feasibility for the use of synthetic peptide antigens for a malaria TBV.

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