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Some progress on understanding the Phanerozoic granitoids in China

China Geology 2018年第1期1卷 84-108页

作者： Tao Wang Ying Tong Xiao-xia Wang jian-ren mao Hong-rui Zhang He Huang Shan Li Lei Guo jian-jun Zhang Key Laboratory of Deep-Earth Dynamics Ministry of Natural ResourcesBeijing 100037China Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China Key Laboratory of Metallogeny and Mineral Assessment of Ministry of Natural Resources Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China Nanjing center China Geological SurveyNanjing 210016China

There are large volumes of the Phanerozoic granitoid rocks in China and neighboring *** recent years,numerous new and precise U-Pb zircon ages have been published for these granitoids,and define many important magmatic events,such as ca.500 Ma granitoid events in the West Junggar,Altai orogens in the NW China,and Qinling orogen in the central *** ages accurately constrain the time of important early Paleozoic,late Paleozoic,early Mesozoic and late Mesozoic magmatic events of the northern,central,western,southern and eastern orogenic Mountains in *** occur various types of granitoids in China,such as talc-alkaline granite,alkali granite,highly-fractionated granite,leucogranite, adakite,and rapakivi *** granites are not only typical Proterozoic as in the North China Craton,but were also emplaced during Paleozoic and Mesozoic in the Kunlun-Qinling orogen,a part of the China Central Orogenic Belt (CCOB).Nd-Hf isotopic tracing and mapping show that granitoids inthe southern Central Asian Orogenic Belt (CAOB)in China (or the Northern China Orogenic Belt)are characterized predominantly by juvenile *** juvenile crust in this orogenic domain accounts for over 50% by area,distinguishing it from other orogenic belts in the world,and those in central (e.g.,Qinling),southwestem and eastern *** on a large amount of new age data,a preliminary granitoid and granitoid-tectonic maps of China have been preliminarily compiled,and an evolutionary framework of Phanerozoic granitoids in China and neighboring areas has been established from the view of assembly and breakup of continental *** ideas on granitoid tectonics has also been proposed and discussed.

关键词： Granitoids Zircon age Spatial-temporal distribution Radiogenic isotopes Orogen

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Enteral refeeding syndrome after long-term total parenteral nutrition

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Chinese Medical Journal 2006年第22期119卷 1856-1860页

作者： ren jian-an mao Yao WANG Ge-fei WANG Xing-bo FAN Chao-gang WANG Zhi-ming LI Jie-shou Department of Surgery Jinling Hospital Medical School of Nanjing University Nanjing 210002 China

Background Early enteral feeding （EF） may result in fever, elevated white blood cell count, increased serum levels of liver enzymes, and diarrhea. We name the complications ＂enteral refeeding syndrome＂, as a subtype of refeeding syndrome, because they are likely to result from long-term lack of lumen nutrition. The aim of this study was to investigate the characteristics of enteral refeeding syndrome after long-term total parenteral nutrition （TPN）, and the solution for the disease. Methods We collected the clinical data of 100 patients with gastrointestinal fistula, who were cured from Apirl 2001 to July 2002. Their fasting time, daily stool frequency, body temperature, heart rate, respiratory rate, levels of transaminases, alkaline phosphatase （AKP）, and γ-glutamylcyclotransferase （γ-GT）, white blood cell count, and systemic inflammatory reaction syndrome （SIRS） score were recorded before and 1, 3, 5, 10, and 15 days after EF. Student＇s t test and analysis of variance were used to analyze the data. Results Of the 100 patients, 56 were cured after selective resection of intestinal fistula, 15 were cured by emergency operation, and 29 recovered spontaneously. The levels of AKP and y-GT increased significantly on the 3rd day after EF [On the 3rd day after EF, （243.0±121.6） U/L and （177.2±109.9） U/L vs. before EF （181.5±127.5） U/L and （118.4±94.2） U/L, P〈0.05], and decreased gradually afterwards. The SIRS scores on the 1st day （1.05±1.08） and 3rd day （0.96±1.11） after EF were significantly higher than that before EF （0.72＋0.84）, then decreased to 0.83±0.91, 0.49±0.73 and 0.32±0.60 on the 5th, 10th and 15th days after EE The number of patients with diarrhea at 1, 3, 5, 10 and 15 days post-EF were 31, 26, 12, 13, and 7, respectively. Conclusions The longer the TPN lasts, the more severe the enteral refeeding syndrome becomes. Continuous EF is effective for the syndrome. Early enteral nutrition is useful in preventing it.

关键词： enteral nutrition refeeding syndrome gastrointestinal fistula diarrhea cholestasis

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Transforming waste particles into valuable adsorbents via amyloid-mediated molecular engineering

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Science China Chemistry 2025年第1期68卷 317-328页

作者： Qingmin Yang jian Zhao Yujia Zhang Xingyu Zhou Hao ren Bowen Hu Zhongli Lei Lixin Chen Peng Yang School of Material and Chemical Engineering Bengbu University Anhui Provincial Engineering Laboratory of Silicon-Based Materials School of Chemistry and Chemical Engineering Northwestern Polytechnical University Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical EngineeringShaanxi Normal University Xi'an Key Laboratory of Polymeric Soft Matter School of Chemistry and Chemical Engineering Shaanxi Normal University International Joint Research Center on Functional Fiber and Soft Smart Textile School of Chemistry and Chemical EngineeringShaanxi Normal University

The high-value utilization of industrial solid waste using a facile and eco-friendly process is of great interest and significance in reducing environmental pollution and developing a green circular economy. Herein, we propose an amyloid-mediated molecular engineering strategy to transform particulate waste into valuable adsorbents for metal ions. Our method has the advantage of aqueous solution fabrication under mild conditions without the use of high-temperature hydrothermal methods and toxic chemical reagents. Amyloid-mediated molecular engineering manipulates the phase transition of bovine serum albumin(BSA)on particulate waste surfaces, resulting in a remarkable ～3.1 times improvement in the adsorption capacity of fly ash, a typical industrial solid waste for gold ions after modification with the phase-transitioned BSA(PTB). The resultant adsorption ability was 69–1,980 times higher than those of conventional and emerging adsorbent materials such as ion exchange resins, activated carbon(AC), covalent organic frameworks(COFs), and metal-organic frameworks(MOFs). We further demonstrated the application of our PTB-modified materials in the recovery of precious metals from low-grade gold ore and electronic waste leachates. Consequently, this strategy could increase the value of waste materials nearly 27 times. In addition, this method is generally extendable to other conventional industrial adsorbents such as resin, clay, and Al2O3, and enhances their adsorption capabilities at least twofold. Overall, this work provides a simple and green approach for improving the adsorption performance of solid particles, and is expected to develop into a universal strategy for transforming waste particles into high-value-added products.

关键词： amyloid-like protein aggregates surface engineering fly ash solid waste adsorption

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Bacterial indole-3-propionic acid inhibits macrophage IL-1β production through targeting methionine metabolism

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Science China Life Sciences 2025年

作者： Ziyi Han jian Fu Aiyan Gong Wenkai ren State Key Laboratory of Livestock and Poultry Breeding College of Animal Science South China Agricultural University Animal Disease-resistant Nutrition Key Laboratory of Sichuan Province Sichuan Agricultural University China Institute of Veterinary Drug Control

The gut microbiota plays key roles in host health by shaping the host immune responses through their metabolites, like indole derivatives from tryptophan. However, the direct role of these indole derivatives in macrophage fate decision and the underlying mechanism remains unknown. Here, we found that bacterial indole-3-propionic acid(IPA) downregulates interleukin-1beta(IL-1β) production in M1 macrophages through inhibition of nuclear factor-kappa B(NF-κB) signaling. Mechanistically, IPA binds specifically with methionine adenosyltransferase 2A(MAT2A) to promote S-adenosylmethionine(SAM) synthesis, which facilitates the DNA methylation of ubiquitin-specific peptidase 16(USP16, a deubiquitinase), and in turn promotes Toll-like receptor 4(TLR4) ubiquitination and NF-κB inhibition. Furthermore,IPA administration attenuates sepsis in mouse models induced by lipopolysaccharides(LPS), showcasing its potential as a microbial-derived adjunct in alleviating inflammation. Collectively, our findings reveal a newly found microbial metabolite-immune system regulatory pathway mediated by IPA.

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降压型DC/DC(Buck)变换器性能的仿真研究

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青岛大学学报（工程技术版） 2007年第2期22卷 62-64页

作者：茹东生姜茂仁海军航空工程学院青岛分院山东青岛266071

为了解决降压型DC/DC变换器的器件选择及参数的最优化设计问题,基于Buck变换器建立了一种数学模型,然后利用PSpice软件对其进行了仿真,并根据仿真结果研究了电路的暂、稳态过程及性能。结果表明:暂态阶段电流和功率较大,稳态输出电压的... 详细信息

为了解决降压型DC/DC变换器的器件选择及参数的最优化设计问题,基于Buck变换器建立了一种数学模型,然后利用PSpice软件对其进行了仿真,并根据仿真结果研究了电路的暂、稳态过程及性能。结果表明:暂态阶段电流和功率较大,稳态输出电压的大小受到电路电感元件和负载阻抗等器件参数的控制。

关键词： DC/DC变换器 PSpice仿真输出电压电路性能

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Global Probabilistic Voltage Sensitivity Analysis of Active Distribution Networks Based on the Compound Gaussian Mixture Model

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Dianwang Jishu/Power System Technology 2025年第1期49卷 295-305页

作者： Zhang, ren Wang, jian Shang, Jie Hai, Chen Liu, Haoming School of Electrical and Power Engineering Hohai University Jiangsu Province Nanjing 211100 China College of Artificial Intelligence and Automation Hohai University Jiangsu Province Nanjing 211100 China

The stochasticity of the high penetration of distributed generations (DGs) exacerbates the voltage fluctuation of the active distribution networks (ADNs) and complicates its voltage safety analysis. Therefore, this paper proposes a global probability voltage sensitivity analysis method based on the compound Gaussian mixture model (GMM). Firstly, a shared node path impedance-based global voltage sensitivity analytical model of ADN is derived to quantify the impact of global power fluctuations on node voltage. Considering that the voltage fluctuation has the non-Gaussian characteristic under the superposition influence of power uncertainty injected by multiple nodes, the GMM is used to characterize the probability characteristics of DG and load forecasting errors. Then, based on the affine transformation of the global sensitivity matrix to the GMM of DG and load forecasting error, the probability analytic expression of the voltage fluctuation is constructed, which is caused by the uncertainty of DG and load. Finally, based on the GMM characteristic function, the compound GMM characteristic function of the combined influence of the uncertainty of DG and load on voltage fluctuation is derived, and the global probabilistic voltage sensitivity analysis model based on the compound GMM is established. The case study results show that the proposed method can reflect the probability characteristics of the impact of all node power fluctuations on node voltage, and can quickly and accurately calculate the probability of over-voltage in ADNs. © 2025 Power System Technology Press. All rights reserved.

关键词： Affine transforms

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人口流动对我国高等教育资源配置的影响及对策研究

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黑龙江高教研究 2025年第1期43卷 31-37页

作者：陈茂建吴刚龙福建教育学院福建福州350001 黎明职业大学福建泉州362000

基于2013一2022年31个省份面板数据,使用固定效应模型实证检验人口流动对我国高等教育资源配置的影响。结果发现:第一,人口流动对高等教育资源配置具有显著影响作用,人口净流入地区和净流出地区分别对高等教育资源配置产生负向影响和正... 详细信息

基于2013一2022年31个省份面板数据,使用固定效应模型实证检验人口流动对我国高等教育资源配置的影响。结果发现:第一,人口流动对高等教育资源配置具有显著影响作用,人口净流入地区和净流出地区分别对高等教育资源配置产生负向影响和正向影响;第二,人口流动对高等教育资源配置的影响因地区经济发展水平、城镇化水平以及人口结构的不同而存在差异,东部地区、城镇化水平为中等的地区、中等文化水平程度在人口流动对高等教育资源配置的影响方面均最显著。基于研究结果一,提出以下对策:一是加强人口流入地区的高等教育资源配置;二是优化人口流出地区的高等教育资源配置。基于研究结果二,提出以下对策:一是加强东部地区的高等教育资源配置;二是注重城镇化水平中等地区的高等教育资源配置;三是加强教育普及程度相对均衡地区的高等教育资源配置。

关键词：人口流动高等教育资源配置对策

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Modification of a magnetic carbon composite for ciprofloxacin adsorption

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Journal of Environmental Sciences 2016年第11期28卷 179-188页

作者： Haixin mao Shikui Wang jian-Ying Lin Zengshuang Wang Jun ren College of Chemistry and Chemical Engineering Key Laboratory of Coal Science and Technology Ministry of Education and Shanxi ProvinceTaiyuan University of Technology

A magnetic carbon composite, Fe3O4/C composite, was fabricated by one-step hydrothermal synthesis, modified by heat treatment under an inert atmosphere（N2）, and then used as an adsorbent for ciprofloxacin（CIP） removal. Conditions for the modification were optimized according to the rate of CIP removal. The adsorbent was characterized by Fourier transform infrared spectroscopy, X-ray diffraction measurements, vibrating-sample magnetometry,scanning electron microscopy, transmission electron microscopy, and N2adsorption/desorption isotherm measurements. The results indicate that the modified adsorbent has substantial magnetism and has a large specific area, which favor CIP adsorption. The effects of solution p H, adsorbent dose, contact time, initial CIP concentration, ion strength, humic acid and solution temperature on CIP removal were also studied. Our results show that all of the above factors influence CIP removal. The Langmuir adsorption isotherm fits the adsorption process well, with the pseudo second-order model describing the adsorption kinetics accurately. The thermodynamic parameters indicate that adsorption is mainly physical adsorption. Recycling experiments revealed that the behavior of adsorbent is maintained after recycling for five times. Overall, the modified magnetic carbon composite is an efficient adsorbent for wastewater treatment.

关键词： Magnetic carbon composite Modification Ciprofloxacin Adsorption

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A DHT-based fast handover management scheme for mobile identifier/locator separation networks

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Science China(Information Sciences) 2013年第12期56卷 222-236页

作者： ZHAI YuJia mao XinYu WANG Yue YUAN jian ren Yong Department of Electronic Engineering Tsinghua University

Several researches propose the identifer/locator separation architecture to tackle the scaling problems of today’s Internet routing and addressing *** scalable and seamless mobility support is an important task in mobile identifer/locator separation *** this paper,by analyzing the features,such as direct separation,flexible mapping and identifer replacement,we show that the new architecture delivers data packets more efciently and protects location privacy better than traditional mobile IP networks,and is able to implement soft handover *** we present a distributed Hash table(DHT)based fast handover management(DFHM)scheme for the new architecture,which improves the reactive handover mode of FMIPv6 and eliminates the duplicate address detection(DAD)and return routability(RR)processes in *** we propose a generic analysis framework for handover ***,we demonstrate the validity of our framework by simulation and quantifcationally study the efects of network scale and movement *** results show that DFHM has good scalability and low handover latency,and has great advantages in the signaling cost and fast mobility support.

关键词： handover management DHT-based management structure mobile identifer/locator separation networks analysis framework

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Role of oxygen vacancy inducer for graphene in graphene-containing anodes

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Frontiers of Chemical Science and Engineering 2023年第3期17卷 326-333页

作者： Fei Wang jian mao College of Materials Science and Engineering Sichuan UniversityChengdu 610065China

Currently,graphene is only considered as a conductive additive and expansion inhibitor in oxides/graphene composite *** this study,a new graphene role(oxygen vacancy inducer)in graphene/oxides composites anodes,which are treated at high-temperature,is proposed and verified using experiments and density functional theory *** high-temperature processing,graphene forms carbon vacancies due to increased thermal vibration,and the carbon vacancies capture oxygen atoms,facilitating the formation of oxygen vacancies in ***,the induced oxygen vacancy concentrations can be regulated by sintering temperatures,and the behavior is unaffected by oxide crystal structures(crystalline and amorphous)and morphology(size and shape).According to density functional theory calculations and electrochemical measurements,the oxygen vacancies enhance the lithiumion storage *** findings can result in a better understanding of graphene’s roles in graphene/oxide composite anodes,and provide a new method for designing high-performance oxide anodes.

关键词： oxide oxygen vacancy graphene anode density functional theory calculation

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