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F10.7指数是太阳活动的重要指标, 准确预测F10.7指数有助于预防和缓解太阳活动对无线电通信、导航和卫星通信等领域的影响. 基于F10.7射电流量的特性, 在双向长短时记忆网络(Bidirectional Long Short-Term Memory Network, BiLSTM)基础上融入注意力机制(Attention), 提出了一种基于BiLSTM-Attention的F10.7预报模型. 在加拿大DRAO数据集上其平均绝对误差(MAE)为5.38, 平均绝对百分比误差(MAPE)控制在5%以内, 相关系数(R)高达0.987, 与其他RNN模型相比拥有优越的预测性能. 针对中国廊坊L&S望远镜观测的F10.7数据集, 提出了一种转换平均校准(Conversion Average Calibration, CAC)方法进行数据预处理, 处理后的数据与DRAO数据集具有较高的相关性. 基于该数据集对比分析了RNN系列模型的预报效果, 实验结果表明, BiLSTM-Attention和BiLSTM两种模型在预测F10.7指数方面具有较好的优势, 表现出较好的预测性能和稳定性.

受通信能力低、能源不足等限制，祝融号火星车有效载荷科学探测需提高探测效率，以有限资源获取尽可能多的有效探测数据。祝融号火星车的巡视探测科学任务着眼于火星局部地区，包括火星车行驶时载荷探测和火星车停止时定点就位载荷探测两个主要工况。统筹考虑祝融号火星车移动能力、通信能力、能源能力、热控能力等约束，合理划分工程活动和科学探测活动可用的资源，协调使用火星车的桅杆和移动系统，优化组合各载荷工作模式，设计了高效载荷探测模式。该探测模式与基于工作模式表的自主探测控制方式相结合，解决了资源受限情况下的多载荷协同探测难题。祝融号火星车有效载荷系统圆满完成了预期探测任务，设计的科学探测模式全部得到在轨验证。结果表明这些模式设计合理有效，满足安全、自主、高效开展科学探测的需求。

Copyright of Journal of Anhui Agricultural Sciences is the property of Journal of Anhui Agricultural Sciences Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ordnance Industry Automation is the property of Editorial Board for Ordnance Industry Automation and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Pesticide Science / Nongyaoxue Xuebao is the property of Chinese Journal of Pesticide Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Mental Health Journal / Zhongguo Xinli Weisheng Zazhi is the property of Chinese Mental Health Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Edulis Fungi is the property of Acta Edulis Fungi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Based on the provincial panel data of the Yangtze River Economic Belt from 2012 to 2021, this article uses the OLS model to analyze the impact of agricultural insurance on the urban-rural income gap in the Yangtze River Economic Belt and various regions. The distribution mediation effect model is used to analyze the mediation effect of rural labor transfer in the impact of agricultural insurance on the urban-rural income gap. The results showed that: agricultural insurance has a significant narrowing effect on the overall income gap between urban and rural areas in the Yangtze River Economic Belt and the upper reaches, while it has a significant widening effect on the income gap between urban and rural areas in the middle and lower reaches, and has no significant narrowing effect on the lower reaches; agricultural insurance serves as a partial intermediary for the urban-rural income gap, and rural labor transfer plays a partial intermediary role in narrowing the urban-rural income gap. [ABSTRACT FROM AUTHOR]

Objective: To prepare multifunctional chemoembolization microspheres featuring Near-Infrared II (NIR-II) fluorescence imaging capabilities, and to evaluate their effectiveness in NIR-II fluorescence-guided surgery for Hepatocellular Carcinoma (HCC). Methods: NaGdF4:Nd@NaGdF, nanoparticles (Re NPs) and polylactic-co-glycolic acid (PLGA)-based microspheres.were pre- pared. The morphology and fluorescence properties of Re NPs were analyzed using Transmission Electron Microscopy (TEM) and fluorescence spectrometer. The morphology and elemental composition of PLGA-based microspheres were characterized by Optical Microscopy, Scanning Electron Microscopy (SEM), and Energy Dispersive Spectroscopy (EDS). The loading capacity and release profile of Doxorubicin (DOX) in PLGA microspheres were determined using UV spectrophotometry. Biocompatibility of the PLGA microspheres was evaluated through Cell Counting Kit-8 (CCK-8) and hemolysis assays. The imaging effectiveness and fluorescence stability of PLGA@Re-DOX microspheres were evaluated using a NIR-II imaging system. PLGA@Re-DOX microspheres were delivered to hepatic artery of rats for in-situ tumor imaging. Results: Re NPs were characterized by good monodispersed and uniform spherical structure, with an average particle size of 9.3± 0.4 nm, displaying excellent NIR-II fluorescence imaging capabilities. PLGA and PLGA@Re-DOX microspheres were noted for their high uniformity with diameters of 294± 7 µm and 288± 13 µm, respectively. Good biocompatibility was observed in the PLGA microspheres, as no significant statistical differences in cell viability and hemolysis rates were found compared to the control group (P>0.05). Additionally, a slow drug release was facilitated by a DOX encapsulation rate of up to 2.5%. The PLGA @Re-DOX microspheres demonstrated effective intrahepatic and extrahepatic NIR-II fluorescence imaging capabilities and excellent fluorescence stability, clearly delineating tumor margins post-delivery via hepatic artery. Conclusion: The synthesized PLGA@Re-DOX microspheres are promising for application in NIR-II fluorescence imaging and fluorescence-guided surgery of HCC. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Modern Medicine & Health is the property of Journal of Modern Medicine & Health and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Academic Library & Information Science is the property of Anhui University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

There is inconsistent toxicity of nitrite and ammonia nitrogen at different salinities and temperatures. To study the effect of nitrite, ammonia, salinity, temperature stress about Litopenaeus vannamei, this experiment is a four-factor and three-level orthogonal test of 35 days, consisting of nitrite concentration (0.05, 0.5, 5 mg/L), ammonia nitrogen concentration (0.2, 0.9, 4 mg/L), salinity (0.5, 15, 30), temperature (20, 25, 30 ℃). The results showed that with increasing nitrite and ammonia nitrogen concentrations, survival rate and body length daily growth value decreased significantly (P<0.05), serum malondialdehyde (MDA), urea nitrogen (BUN) and blood ammonia (AMM) content increased significantly (P<0.05), and superoxide dismutase (SOD) activity in hepatopancreas increased significantly (P<0.05). With increasing salinity, serum activities of alanine aminotransferase (ALT) and azelaic aminotransferase (AST) were significantly (P<0.05) lower； daily growth values of body length, daily growth values of body weight, SOD and alkaline phosphatase (AKP) activities were significantly (P<0.05) higher. With increasing temperature, survival rate decreased significantly (P<0.05), serum BUN, AMM content and SOD activity increased significantly (P<0.05). The interaction between nitrite and salinity had the greatest effect on survival rate. Salinity had the greatest effect on daily growth values of body length and body weight. Ammonia nitrogen had the greatest effect on MDA content. Nitrite had the greatest effect on BUN and AMM content, as well as SOD activity. The interaction between nitrite and ammonia nitrogen had the greatest effect on ALT, AST, ACP activity. The interaction between nitrite and temperature had the greatest effect on AKP activity. The study showed that both interaction between salinity and nitrite and the interaction between ammonia and nitrite produced synergistic effects of ALT and AST activities, with the toxic effects of nitrite playing a dominant role at low salinity. In the external environment, the antioxidant capacity of the body under co-stress was mainly affected by the contents of nitrite and ammonia nitrogen. The antioxidant capacity was weaker at 20 ℃. About growth and antioxidant function of Litopenaeus vannamei, the interaction between nitrite and ammonia nitrogen, salinity, temperature had a greater effect than single factor. The present study may provide a reliable experimental basis for a healthy and sustainable industry of Litopenaeus vannamei, and the nitrite should be controlled to be lower than 0.5 mg/L, the ammonia nitrogen to be lower than 0.9 mg/L, the water temperature to be lower than 30 ℃ [ABSTRACT FROM AUTHOR]

Copyright of Inorganic Chemicals Industry is the property of Editorial Office of Inorganic Chemicals Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Gold (1001-1277) is the property of Gold Magazine Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Condiment is the property of China Condiment and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective To observe the effects of luteolin on the proliferation, apoptosis, migration and glycolysis of human hepatocellular carcinoma cell lines and to explore their mechanism. Methods HepG2 and Huh7 cells cultured in vitro were divided into two groups. Cells in the control group were treated with DMEM medium, and cells in the experimental groups were treated with 20，40，60，80 and 100 µmol/L luteolin, respectively. Cell proliferation rate was measured by CCK-8 assay. The number of cell clones formed was detected by the cell clone formation experiment to evaluate the cell proliferation ability. The relative expression levels of apoptosis-related proteins (Bax, Bcl-2, and Caspase-3 proteins) were measured by Western blotting to evaluate the apoptosis ability. The cell migration rate was measured by the cell scratch test to evaluate the cell migration ability. The glucose consumption and lactic acid production levels were determined by the kit. Glycolysis-related proteins (GLUT4, PDK1, HK2, PKM2, and LDHA proteins) were detected by Western blotting to evaluate the cell glycolysis ability. Western blotting was used to detect the LKB1/AMPK signaling pathway-related proteins (LKB1/P-LKB1 and AMPK/P-AMPK protein ratios). Results Compared with the control group, the proliferation rates of HepG2 and Huh7 cells in the experimental group decreased in a time- and dose-dependent manner； the number of colony-forming cell colonies of HepG2 and Huh7 cells in the experimental group decreased in a dose-dependent manner (all P<0. 05). Compared with the control group, the relative expression levels of Bax and Caspase-3 proteins in HepG2 and Huh7 cells in the experimental group increased, and the relative expression of Bcl-2 protein decreased in a dose-dependent manner (all P<0. 05). Compared with the control group, the migration rates of HepG2 and Huh7 cells in the experimental group decreased in a time- and dose-dependent manner (both P<0. 05). Compared with the control group, the glucose consumption of HepG2 and Huh7 cells in the experimental group (except for the dose of 20 µmol/L) decreased, and the lactate production increased in a dose-dependent manner； the relative expression levels of GLUT4, PDK1, HK2, PKM2 and LDHA proteins in HepG2 and Huh7 cells in the experimental group decreased in a dose-dependent manner (all P<0. 05). Compared with the control group, the protein expression ratios of LKB1/P-LKB1 and AMPK/ P-AMPK in the experimental group increased in a dose-dependent manner (both P<0. 05). Conclusions Luteolin inhibits the glycolysis process of human hepatocellular carcinoma cell lines, further inhibits cell proliferation, migration and promotes apoptosis in a dose- or time-dependent manner, and the mechanism may be related to the activation of intracellular LKB1/AMPK signaling pathway. [ABSTRACT FROM AUTHOR]

Short-lasting unilateral neuralgiform headache attacks is a rare type of primary headache, which is usually accompanied by ipsilateral conjunctival congestion and (or) lacrimation and other autonomic symptoms during episodes, and generally presents a chronic course. Most patients repeatedly seek medical attention due to ineffective diagnosis and treatment, causing great suffering and severely affecting their quality of life. Currently, in clinical practice, short-lasting unilateral neuralgiform headache attacks has not been sufficiently recognized. Due to its rarity, there is a lack of related research in China, hence there is an urgent need to improve clinicians' awareness and diagnostic and treatment level to reduce the rate of misdiagnosis. This article reviews the research progress in the epidemiology, pathophysiological mechanisms, clinical characteristics, diagnosis and treatment of short- lasting unilateral neuralgiform headache attacks, aiming to provide a more comprehensive reference for clinicians, thereby improving the effective diagnosis and treatment rate, helping patients to get rid of pain as soon as possible, and improving the quality of life. At the same time, it also calls for researchers at home and abroad to increase their research efforts on short-lasting unilateral neuralgiform headache attacks to provide more theoretical basis for clinical treatment. [ABSTRACT FROM AUTHOR]

In recent years, computer-aided design and manufacturing (CAD/CAM) have been driving the development and reform of the dental field. Prosthodontics is an essential part of oral medicine, and CAD/CAM is increasingly being used in prosthodontics, leading to rapid advancements in this field. This paper summarizes a number of domestic and international literatures to provide an overview of the progress of CAD/CAM in prosthodontics. [ABSTRACT FROM AUTHOR]

The adaptability and mobility of high-end equipment in extreme war environments guarantee national defense security and are of great strategic significance. To advance the upgrading of such equipment, a key step is to improve the lightweight level and functionality of the main load-bearing structures. The high-end equipment working under the extreme coupled multi-field environment puts forward high demands on lightweight and multifunctionality of the main load-bearing components. The separation of load-bearing structures and functional components (e.g., vibration and noise reduction, bullet and explosion resistance, impact energy absorption, heat dissipation, and wave absorption parts, etc.) in existing equipment, results in structure and weight redundancy, making it difficult to further improve the operational performances. Therefore, there is an urgent need to develop ultralight, compact, load-bearing, and multifunctional metastructures. Herein, the concept of ultralight, compact, and load-bearing metastructures was proposed for the first time and a clear definition was given. A series of design schemes for prototype metastructures were summarized in combination with practical engineering application requirements. Future development directions of metastructures are also envisioned. [ABSTRACT FROM AUTHOR]

Objective: To study the role and preliminary molecular mechanism of TRIM24 regulating macrophage polarization in viral myocarditis （VM）. Methods: VM mouse model was established by Coxsackie virus B3（ CVB3）, and expression of TRIM24 in myocardial tissue was detected. Cardiac inflammation level and polarization phenotype of cardiac infiltrating macrophages in a murine model of cardiac TRIM24 inhibition were detected in vivo. A polarization model of mouse bone marrow-derived macrophages（ BMDMs） in vitro was established to observe the role of TRIM24 inhibition in polarizing BMDMs to M1 and M2, as well as its effects on phagocytosis and bactericidal function of BMDMs. Effects of TRIM24 inhibition on total STAT6 protein level and phosphorylation were investigated. Results: TRIM24 was significantly highly expressed in myocardial tissue of VM mice （P<0.001）. Inhibition of TRIM24 expression in myocardium had an attenuating effect on VM and promoted polarization of cardiac infiltrating macrophages to M2. TRIM24 was significantly down-regulated in vitro during the polarization of BMDMs toward M2 （P<0.01）. Inhibition of TRIM24 expression significantly promoted macrophage polarization toward M2 type and inhibited polarization toward M1 type, accompanied by a significant increase in STAT6 phosphorylation levels （P<0.01）. Conclusion: TRIM24 regulates macrophage M2 polarization via activation of STAT6 signaling pathway to attenuate VM. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Dermatovenereology is the property of Xi'an Jiaotong University Periodicals Center and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Journal of Xi'an Jiaotong University is the property of Editorial Office of Journal of Xi'an Jiaotong University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Railway Science & Engineering is the property of Journal of Railway Science & Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Command Control & Simulation / Zhihui Kongzhi yu Fangzhen is the property of Command Control & Simulation Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Clinical specialist nurses play an important role in outpatient nursing of integrated Traditional Chinese and western medicine. In order to make the outpatient nursing of integrated Traditional Chinese and western medicine more effective, medical institutions should optimize the management mode of specialist nurses around the following nine aspects: strictly employing specialized nurses, setting up standardized posts of specialized nurses, formulating and perfecting the work and assessment system, establishing specialist nursing team, strengthening humanized management, optimizing outpatient layout, strengthening patient education, optimizing the process of seeing a doctor, and establishing outpatient nursing supervision group. (专科护士在中西医结合门诊护理中发挥着重要作用。本文从严格聘任用专科护士、设置规范化专科护士岗位、制定完善工作及考核制度、建立专科护理团队、加强人性化管理、优化门诊布局、加强患者宣教、优化就诊流程、建立门诊护理监督小组9个方面总结了优化专科护士管理模式的实践经验, 以为实现中西医结合门诊护理更大的效益提供参考。)

Copyright of Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Inorganic Analytical Chemistry / Zhongguo Wuji Fenxi Huaxue is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Colchicine is an alkaloid derived from Colchicum automnale and Gloriosa superba, which becomes more widely used for the treatment of acute gouty arthritis, but its therapy dose is near to the poisoning dose. This paper reported two cases of colchicine overdose with different prognosis. Even the continuous veno-venous hemofiltration have been done to decrease the serum concentration of colchicine, the prognosis could not be reversed in case one. Due to the lower serum concentration of drug, case two had the better prognosis. The coagulopathy and elevated liver enzyme had been found in both cases. A significant leukocytosis with thrombocytopenia was observed in case one. The colchicine is a high poisonous drug, over dose of which has a bad prognosis and rapid change of clinical status. The clinical doctors should take it seriously. (秋水仙碱是从秋水仙和桂花中提取的生物碱, 广泛应用于急性痛风性关节炎, 但使用剂量接近于中毒剂量。本文报告了两例秋水仙碱中毒病例, 其中一例经连续血液滤过降低了血清秋水仙碱浓度后, 预后依然不可逆转; 第二例由于血药浓度相对较低而预后更好。两例均见凝血功能障碍和肝酶升高, 其中病例一有明显白细胞增多伴血小板减少。秋水仙碱药物不良反应明显, 服用过量者预后差且病情进展快, 临床应用需小心谨慎。)

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Anhui Agricultural Sciences is the property of Journal of Anhui Agricultural Sciences Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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How to effectively utilize industrial policies to enable the coordinated development of new energy vehicles and charging stations is a policy challenge faced by the Chinese government. This study focused on the impact of heterogeneous industrial policies on the development of charging infrastructure for new energy vehicles in China. Based on panel data from 31 provinces in China from 2010 to 2022, this study used a staggered difference-in-differences model to examine the impact and mechanisms of policies such as charging station construction subsidies, preferential tariff policies, land supply, and layout planning on charging station ownership and discussed the effect differences between subsidies by power and those by total investment. The results found that: ① Charging station ownership was significantly higher in areas where industrial incentive policies were implemented than in non-implemented areas, with a marginal effect of 33.4%. This result remained robust under multiple scenarios, such as changing the window period, using a change-in-change model, and relaxing the parallel trend. ② Among the two types of subsidies, charging power subsidies had a more pronounced effect compared with subsidies based on the amount of investment. ③ Among the four types of industrial policies, preferential tariff policies and construction subsidies had more pronounced effects. ④ Heterogeneity analysis showed that the effect of the charging station construction subsidy policy was more pronounced in areas with lower population density and lower land transfer prices of the demonstration and promotion areas; in addition, the effects of the subsidy policy were better in the short term than in the long term and were more significant in areas with lower population density and lower land transfer prices. ⑤ The charging station construction subsidies indirectly affected the number of charging stations by increasing the amount of infrastructure investment, the area of land used for facility construction, and charging technology patents. Based on these empirical results, this study recommends that we should implement a differentiated charging station construction subsidy policy, optimize the current charging power subsidy policy, improve the current preferential tariff policy, improve the accuracy of land supply and layout planning, formulate a differentiated policy according to the characteristics of different regions, encourage technological innovation, and pay attention to the feedback of policy implementation. [ABSTRACT FROM AUTHOR]

Two-year-old seedlings of six broad-leaved species, Phoebe bournei, Castanopsis fordil, Mytilaria laosensis, Quercus glauca, Quercus sessilifolia, and Schima superba, were obtained from the Baisha State-owned Forest Farm in Shanghang County, Fujian province, China. The biomass of the roots, stems, leaves, and whole plants of each species was determined by using the whole-plant harvesting method. The allocation characteristics of biomass and the isometric growth relationship between aboveground and underground biomass were compared. Regression estimation models for the biomass of each organ and the whole plant were established using regression analysis. The results showed that: (1) the whole seedling biomass of different tree species was significantly different, and the order was Q. glauca＞M. laosensis＞C. fordil＞Q. sessilifolia＞S. superba＞P. bournei; (2) there were significant differences in the distribution of biomass among the organs of different tree species, with Q. glauca, M. laosensis, and P. bournei having the largest proportions of root biomass (39.9%), stem biomass (45.0%), and leaf biomass (49.2%), respectively; (3) the ratio of belowground biomass to aboveground biomass of the seedlings of different tree species was less than 1, indicating that more seedling biomass was allocated to the stems and leaves. The aboveground and belowground biomass of the tree species followed an isotropic growth pattern, except in the case of S. superba; (4) the models for regression estimation of seedling biomass of different tree species were mostly power-function models, followed by cubic polynomial models. There were differences in the allocation of biomass among different organs in the seedlings. Additionally, an isometric growth pattern between the aboveground and belowground biomass in seedlings was revealed. The regression estimation model for seedling biomass of each tree species can be used to estimate seedling biomass under similar or identical site conditions. [ABSTRACT FROM AUTHOR]