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Research on Interface Management of General Contracting Projects

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World Journal of Engineering and Technology 2022年第2期10卷 194-212页

作者： xinhua zheng Anhui Cindare Real Estate Development Co. Ltd. Hefei China

In recent years, EPC, as a project contracting model, has been promoted in the international and domestic markets. This mode can realize the reasonable intersection of design, procurement and construction, and can reasonably combine the three major businesses so that the whole project plan can be more optimized which is very beneficial to the management of the owner, and can effectively ensure the progress of the project construction. The achievement of the owner’s cost target. However, many participants are intertwined in a system, which will inevitably bring huge challenges to managers. For example, the goals of different participants are very different, which will form the interface between organizations. Based on this problem, this paper will systematically review the interface management, find out the influencing factors of the EPC project interface management through literature, and further screen and evaluate the influencing factors through expert interviews and questionnaires, so as to obtain six influencing factors: poor information processing ability, design work ignores buildability, security incident, too much intervention by the owner, use of new technologies, new materials and new processes in construction, uncertainty and changes in the surrounding environment, and carry out variance analysis of influencing factors for different individual characteristics and obtain factors such as “too much intervention by the owner”. Males have higher recognition and higher education than females. The higher the degree of recognition of this factor is, the highest degree of recognition of the supervision unit for “design work ignores constructability” is.

关键词： EPC Interface Management Influence Factor

MicroRNAs： crucial modulators of fetal epigenetic programming in nutrition and glucose metabolism

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Chinese Medical Journal 2014年第20期127卷 3521-3523页

作者： Xiao xinhua zheng Jia Department of Endocrinology Key Laboratory of EndocrinologyMinistry of Health Peking Union Medical College Hospital DiabetesResearch Center of Chinese Academy of Medical Sciences & PekingUnion Medical College Beijing 100730 China

It is generally believed that genotype and adult lifestyle elements are primary risks of diabetes mellitus. However, increasing evidence demonstrates that early life malnutrition during the period of gestation and/or lactation may increase our susceptibility to some metabolic diseases in later life and the underlying mechanism is not very clear. Recently, epigenetics is hypothesized to be the important molecular basis of the imbalanced early life nutrition and glucose metabolism disorders. The fundamental mechanism is that early developmental nutrition can regulate epigenetic modifications of some genes associated with development and metabolism. MicroRNAs （miRNAs） are recognized as an important epigenetic modification and they are a major class of small noncoding RNAs （about 20-22 nucleotides） which can mediate posttranscriptional regulation of target genes with cell differentiation and apoptosis. Recent studies suggest that miRNAs may be the crucial modulators of fetal epigenetic programming in nutrition and metabolic disorders. How miRNAs can modulate the relationship between early life nutrition and disease susceptibilities, especially for aberrant glucose metabolism？

关键词： mieroRNAs epigenetics fetal programming nutrition glucose metabolism

Development of High Areal Capacity Electrolytic MnO_(2)-Zn Battery via an Iodine Mediator

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Energy & Environmental Materials 2023年第6期6卷 243-250页

作者： xinhua zheng Ruihao Luo Touqeer Ahmad Jifei Sun Shuang Liu Na Chen Mingming Wang Yuan Yuan Mingyan Chuai Yan Xu Taoli Jiang Wei Chen Department of Applied Chemistry School of Chemistry and Materials ScienceHefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026 China

The commercialization of electrolytic MnO_(2)-Zn batteries is highly applauded owing to the advantages of cost-effectiveness,high safety,high energy density,and durable working ***,due to the low reversibility of the cathode MnO_(2)/Mn^(2+)chemistry at high areal capacities and the severe Zn anode corrosion,the practical application of MnO_(2)-Zn batteries is hampered by inadequate *** the full advantage of an iodine redox mediator,here we design a highly rechargeable electrolytic MnO_(2)-Zn battery with a high areal *** MnO_(2)-Zn battery coupled with an iodine mediator in a mild electrolyte shows a high discharge voltage of 1.85 V and a robust areal capacity of 10 mAh cm^(-2)under a substantial discharge current density of 160 mA cm^(-2).The MnO_(2)/I_(2)-Zn battery with an areal capacity of 10 mAh cm^(-2)exhibits prolonged stability of over 950 cycles under a high-capacity retention of~94%.The scaled-up MnO_(2)/I_(2)-Zn battery reveals a stable cycle life under a cell capacity of~600 ***,our constructed MnO_(2)/I_(2)-Zn battery demonstrates a practical energy density of~37 Wh kg^(-1)and a competitive energy cost of<18 US$kWh^(-1)by taking into account the cathode,anode,and *** MnO_(2)/I_(2)-Zn battery,with its remarkable reversibility and reasonable energy density,enlightens a new arena of large-scale energy storage devices.

关键词： high areal capacity iodine redox mediator large-scale energy storage MnO2-Zn battery

Effects of extracts from Chuanwu(Aconitum Carmichaelii) and Banxia(Rhizoma Pinelliae) on excisional wound healing in a rat's model

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Journal of Traditional Chinese Medicine 2019年第1期39卷 65-73页

作者： Xia Xichao Ma Yuhong Wang Fuan zheng xinhua Liu Yang Zhang Junfeng Cui Juan Shi Bingqin Li Hongwen Liu Rongzhi Zhang Yaping Cheng Zhaofei Han Xiaolong Medcine College of Pingdingshan University Pingdingshan 476000China Basic Medicine College Nanyang Medical UniversityNanyang 473061China

OBJEVTIVE: To investigate the effects of extracts from Chuanwu(Aconitum Carmichaelii) and Banxia(Rhizoma Pinelliae) on the excisional wound healing in a rat's ***: Rats were performed a surgical lesion with a 2.0 cm resected tissue in the dorsal ***, animals were randomly divided into model group, YNB group and APE group those were respectively treated with saline, 1 mg/mL of Yunnan Baiyao and 1 mg/mL of Chuanwu(Aconitum Carmichaelii) and Banxia(Rhizoma Pinelliae) extracts. Wound contractions in days 0, 3, 7, 14 and 21 were calculated by an image analyzer. Histological analysis was analyzed using hematoxilin and *** of tumor necrosis factor-2(IL-2), IL-4, IL-10, transformαin(TNF-g growα), interleukinth factor-1(TGF-nd basic fibroblast growth factor(bFββ1) a-GF) were determined by real-time quantitative ***: Compared with that of YNB group and APE gtoup, the skin of rats showed poor re-modeling and re-epithelization characterized by a significant decrease of neovascularization, epithelialization and fibroblast in the model group. In the APE group, levels of TNF-α-and IL-2 were significantly down-regulated and IL4 and IL-10 significantly upregulated in contrasted with that of model *** addition, levels of TGF-roup were significantly iβ1 and bFGF in the APE gnduced compared with that of model ***: The results suggest that the extracts from Chuanwu(Aconitum Carmichaelii) and Banxia(Rhizoma Pinelliae) promote wound healing in the rats, which is associated with enhancing antiinflammatory ability and inducing fibroblast formation.

关键词： Wound healing Aconitum Carmichaelii Rhizoma Pinelliae Plant extracts Anti-inflammatory agents Fibroblasts

High-performance Zn battery with transition metal ions co-regulated electrolytic MnO_(2)

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eScience 2021年第2期1卷 178-185页

作者： Mingyan Chuai Jinlong Yang Mingming Wang Yuan Yuan Zaichun Liu Yan Xu Yichen Yin Jifei Sun xinhua zheng Na Chen Wei Chen Department of Applied Chemistry School of Chemistry and Materials ScienceHefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefeiAnhui230026China College of Materials Science and Engineering Shenzhen UniversityShenzhen518060China

Electrolytic MnO_(2)/Zn batteries have attracted extensive attention for use in large-scale energy storage applications due to their low cost,high output voltage,safety,and environmental ***,the poor electrical conductivity of MnO_(2)limits its deposition and dissolution at large capacities,which leads to sluggish reaction kinetics and drastic capacity ***,we report a theory-guided design principle for an electrolytic MnO_(2)/Zn battery co-regulated with transition metal ions that has improved electrochemical performance in terms of deposition and stripping *** start with first-principles calculations to predict the electrolytic effects of regulating transition metal ions in the deposition/stripping chemistry of the MnO_(2)*** results indicate that with the simultaneous incorporation of strongly electronegative Co and Ni,the MnO_(2)cathode tends to possess more active electron states,faster charge-transfer kinetics,and better electrical conductivity than either MnO_(2)regulated with Co or Ni on their own,or pristine MnO_(2);hence,this co-regulation is beneficial for the cathode solid/liquid MnO_(2)/Mn2t *** then fabricate and demonstrate a novel Co2t and Ni2t coregulated MnO_(2)/Zn(Co-Ni-MnO_(2)/Zn)battery that yields significantly better electrochemical performance,finding that the synergistic regulation of Co and Ni on MnO_(2)can significantly increase its intrinsic conductivity and achieve high rates and Coulombic efficiencies at large *** aqueous Co-Ni-MnO_(2)/Zn battery exhibits a high rate(10C,100 mA cm^(-2)),high Coulombic efficiency(91.89%),and excellent cycling stability(600 cycles without decay)at a large areal capacity of 10 mAh cm^(-2).Our proposed strategy of co-regulation with transition metal ions offers a versatile approach for improving the electrochemical performance of aqueous electrolytic MnO_(2)/Zn batteries in large-scale energy storage applications.

关键词： Aqueous battery MnO_(2)cathode Deposition and stripping chemistry Electrolytic effect Large-scale energy storage

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叙事研究与教师专业发展的个人经历与问题

全球教育展望 2005年第12期34卷 22-24页

作者：郑新华华东师范大学教育学系博士生上海200062

引入叙事研究,可以改变教师专业发展研究的常规模式,使之由建构各种技术化或制度化的专业发展框架转向理解个体化的专业发展经验。这一叙事研究策略在当前国内教育学界已开始被运用,并因此揭示了一线教师心目中的专业发展问题,进而表明... 详细信息

引入叙事研究,可以改变教师专业发展研究的常规模式,使之由建构各种技术化或制度化的专业发展框架转向理解个体化的专业发展经验。这一叙事研究策略在当前国内教育学界已开始被运用,并因此揭示了一线教师心目中的专业发展问题,进而表明,在教师那里,专业发展决不仅仅只是涉及教学工作,而更牵涉到教师个人的生活问题,诸如能否安身立命,赋予人生以意义,能否在个人的生活环境中展现自我认同。只有解决了这些个人问题,教师的专业发展才会呈现出主动性与连续性。

关键词：教师专业发展教育叙事研究个人经历与问题

Toward dendrite-free and anti-corrosion Zn anodes by regulating a bismuth-based energizer

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eScience 2022年第5期2卷 509-517页

作者： Mingming Wang Yahan Meng Ke Li Touqeer Ahmad Na Chen Yan Xu Jifei Sun Mingyan Chuai xinhua zheng Yuan Yuan Chunyue Shen Ziqi Zhang Wei Chen Department of Applied Chemistry School of Chemistry and Materials ScienceHefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefeiAnhui230026China

Aqueous rechargeable zinc metal batteries display high theoretical capacity along with economical effectiveness,environmental benignity and high ***,dendritic growth and chemical corrosion at the Zn anodes limit their widespread ***,we construct a Zn/Bi electrode via in-situ growth of a Bi-based energizer upon Zn metal surface using a replacement *** and theoretical calculations reveal that the Bi-based energizer composed of metallic Bi and ZnBi alloy contributes to Zn plating/stripping due to strong adsorption energy and fast ion transport *** resultant Zn/Bi electrode not only circumvents Zn dendrite growth but also improves Zn anode anti-corrosion ***,the corrosion current of the Zn/Bi electrode is reduced by 90%compared to bare ***,an ultra-low overpotential of 12mV and stable cycling for 4000h are achieved in a Zn/Bi symmetric cell.A Zn–Cu/Bi asymmetric cell displays a cycle life of 1000 cycles,with an average Coulombic efficiency as high as 99.6%.In addition,an assembled Zn/Bi-activated carbon hybrid capacitor exhibits a stable life of more than 50,000 cycles,an energy density of 64Wh kg−1,and a power density of 7kWkg−*** capacity retention rate of a Zn/Bi–MnO_(2)full cell is improved by over 150%compared to a Zn–MnO_(2)cell without the Bi-based *** findings open a new arena for the industrialization of Zn metal batteries for large-scale energy storage applications.

关键词： Aqueous Zn anode Anti-corrosion Replacement reaction Dendrite-free Bismuth-based energizer

Research Progress of High Entropy Ceramic Materials

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Research and Application of Materials Science 2024年第1期6卷 16-22页

作者： Song WU Shikai LIU Jialin WANG Bibo HAN Shaoyi SHEN Zhigang YU Zhaobo ZHANG xinhua zheng School of Materials Science and Engineering Henan University of TechnologyZhengzhouHenan450001China

High-entropy materials(HEMs)have better mechanical,thermal,and electrical properties than traditional materials due to their special"high entropy effect".They can also adjust the performance of high entropy ceramics by adjusting the proportion of raw materials,and have broad application prospects in many *** article provides a review of the high entropy effect,preparation methods,and main applications of high entropy ceramic materials,especially exploring relevant research on high entropy perovskite *** is expected to provide reference for the promotion of scientific research and the development of further large-scale applications of high-entropy ceramic materials.

关键词： High-entropy ceramic materials high entropy effect preparation method perovskite structure research prog

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非均质油藏的岩石渗透率合成方法研究

石油学报 2007年第2期28卷 102-104页

作者：赵军惠延安王平郑新华西南石油大学石油工程学院四川成都610500 中国石油塔里木油田公司新疆库尔勒841000

渗透率合成方法经常应用在石油储量计算、油田开发方案编制和油藏数值模拟等油藏工程研究中,主要包括垂向上不同层段渗透率的合成以及沿渗流方向不同渗透率带渗透率的合成。根据达西定律及建立的渗流模型,经过数学推导,得到垂向和水平... 详细信息

渗透率合成方法经常应用在石油储量计算、油田开发方案编制和油藏数值模拟等油藏工程研究中,主要包括垂向上不同层段渗透率的合成以及沿渗流方向不同渗透率带渗透率的合成。根据达西定律及建立的渗流模型,经过数学推导,得到垂向和水平方向两类渗流模型的渗透率合成公式。其中,垂向上不同层段渗透率的合成按流量叠加原理进行推导,而沿渗流方向不同渗透率带的合成则按不同渗透率带的压差叠加原理进行合成。结合石油地质、开发研究工作的具体情况,用室内实验实测数据进行了验证,计算结果的误差为0.28%-5.35%,基本上在允许的范围之内。

关键词：非均质油藏渗透率油藏工程渗透率合成方法渗流模型