Supervisory Optimization of the MGT-CCHP System Using Model Predictive Control

Yi Zhang,Fan Zhang,Xiao Wu,Junli Zhang,Li Sun,Jiong Shen 제어로봇시스템학회 2017 제어로봇시스템학회 국제학술대회 논문집 Vol.2017 No.10

This paper proposes a supervisory optimal control structure for the micro-gas-turbine based combined cooling heating and power (MGT-CCHP) system. In the upper layer of the structure, a dynamic optimal reference governor is developed to calculate the optimal operating points according to the given economic performance indexes, and in the lower layer of the structure, model predictive control is utilized to track the given operating points, so that a dynamic optimality can be achieved under the input-output constraints during the optimization. Moreover, a disturbance term is introduced in the model to lump the effect of unmeasured disturbances and plant behavior variations, thus, their influences on the supervisory optimization can be removed. The advantages and effectiveness of the proposed method are demonstrated through the simulations on an 80kW MGT-CCHP simulator.

The Beneficial Effects of a Polysaccharide from Moringa oleifera Leaf on Gut Microecology in Mice

Fang Wang,Yi-Fan Bao,Jia-Jun Si,Yu Duan,Ze-Bin Weng,Xin-Chun Shen 한국식품영양과학회 2019 Journal of medicinal food Vol.22 No.9

Moringa oleifera is a natural plant with high nutritional and pharmacological value. Leaves of M. oleifera contain a variety of active substances. In our previous research, we had obtained a polysaccharide separated from M. oleifera leaf, namely MOs-2-a (1.35 × 104 Da). In this study, this polysaccharide was administrated daily to 6 week-old ICR mice for 4 weeks. Then, the body weight, immunity, intestinal digestion, and intestinal microenvironment of Institute of Cancer Research (ICR) mice were investigated. After 4 weeks of feeding intervention with the polysaccharide, the immune and intestinal digestive ability of the ICR mice were significant as shown by the organ index, digestive enzymes, and reduction of serum tumor necrosis factor-alpha and diamine oxidase levels. The polysaccharide could regulate the microbial composition of the intestinal tract in mice by increasing the bacteria that have been reported for antiobesity effects, short chain fatty acid production, and lactic acid production. These findings indicate that the polysaccharide of M. oleifera leaf might be a promising prebiotic that exhibits health promotion effects.

Influence of Curcumin on HOTAIR-Mediated Migration of Human Renal Cell Carcinoma Cells

Pei, Chang-Song,Wu, Hong-Yan,Fan, Fan-Tian,Wu, Yi,Shen, Cun-Si,Pan, Li-Qun Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.10

Background: This study investigated the influence of curcumin on HOX transcript antisense RNA (HOTAIR)-mediated migration of cultured renal cell carcinoma (RCC) cells. Materials and Methods: Five RCC cell lines (769-P, 769-P-vector, 769-P-HOTAIR, 786-0, and Kert-3 ) were maintained in vitro. The expression of HOTAIR mRNA was determined by quantitative real-time PCR and cell migration was measured by transwell migration assay. The effects of different concentrations of curcumin (0 to $80{\mu}mol/L$) on cell proliferation was determined by the CCK-8 assay and influence of non-toxic levels (0 to $10{\mu}M$) on the migration of RCC cells was also determined. Results: Comparison of the 5 cell lines indicated a correlation between HOTAIR mRNA expression and cell migration. In particular, the migration of 769-P-HOTAIR cells was significantly higher than that of 769-P-vector cells. Curcumin at $2.5-10{\mu}M$ had no evident toxicity against RCC cells, but inhibited cell migration in a concentration-dependent manner. Conclusions: HOTAIR expression is correlated with the migration of RCC cells, and HOTAIR may be involved in the curcumin-induced inhibition of RCC metastasis.

매드 - 창사 문화 공원_창사, 중국

Yu Kui,Li Guo Jin,Shen Jun,Florian Pucher,Yi Wen Zhen,Li Juan,Zhao Fan,Hao Yi,Yao Mengyao 현대건축사 2006 월간 CONCEPT Vol.- No.86

Aldehyde Volatiles Emitted in Succession from Mechanically Damaged Leaves of Poplar Cuttings

( Zeng Hui Hu ),( Ying Bai Shen ),( You Qing Luo ),( Fan Yi Shen ),( Hai Bo Gao ),( Rong Fu Gao ) 한국식물학회 2008 Journal of Plant Biology Vol.51 No.4

Plant aldehydes are volatiles necessary to defenses against environmental stress. To explore their emissions in response to wounding, we performed gas chromatography-mass spectrometry (GC-MS) on cuttings from poplar (Populus simonii×P. pyramidalis ``Opera 8277``) that were mechanically damaged to mimic herbivore attack. We detected 16 aldehydes, including 11 linear saturated aldehydes, 3 linear unsaturated aldehydes, and 2 non-linear aldehydes. Emissions of these aldehydes were clearly enhanced by such treatment, and exhibited a similar pattern of change, i.e., increasing in the first 2 h, then sharply decreasing before rising again at about 12 h. Two release peaks for these aldehydes were observed. Therefore, we propose two pathways for the mediation of aldehyde emissions following damage. The first peak may represent emissions from plant storage pools, whereas the second release peak might result from greater formation de novo through an activated synthesis pathway.

Distinct effects of Al³⁺ doping on the structure and properties of hexagonal turbostratic birnessite: A comparison with Fe³⁺ doping

Yin, Hui,Kwon, Kideok D.,Lee, Jin-Yong,Shen, Yi,Zhao, Huaiyan,Wang, Xiaoming,Liu, Fan,Zhang, Jing,Feng, Xionghan Elsevier 2017 Geochimica et cosmochimica acta Vol.208 No.-

<P><B>Abstract</B></P> <P>Hexagonal turbostratic birnessite, one of the most reactive Mn oxide minerals, is ubiquitous throughout the ocean floor to the surface environment. During its crystallization, birnessite may coexist with Al<SUP>3+</SUP>, which is the third most abundant crustal element. However, interactions of Al<SUP>3+</SUP> with birnessite compared to the transition metal (TM) ions have rarely been explored thus far. This study examines the structure and properties of Al<SUP>3+</SUP>-doped hexagonal turbostratic birnessite to obtain insights into the interaction of metal cations with birnessite-like minerals in natural environments. For Al<SUP>3+</SUP>-incorporated birnessite, the crystal chemistry of Al<SUP>3+</SUP>, as well as alteration in the mineral structure, physicochemical properties, and reactivity toward the sorption of Pb<SUP>2+</SUP>/Zn<SUP>2+</SUP> is investigated by powder X-ray diffraction, chemical analysis, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and X-ray absorption spectroscopy. Electronic structure calculations based on density functional theory (DFT) are further combined to aid in the experimental interpretation of Al<SUP>3+</SUP> incorporation. As a comparative system, Fe<SUP>3+</SUP>-coprecipitated birnessite is also examined. Under the experimental conditions used, only a small amount of Al<SUP>3+</SUP> is incorporated into birnessite, with a final Al/(Al+Mn) molar ratio of ∼0.07, whereas Fe<SUP>3+</SUP> is incorporated into birnessite with a final Fe/(Fe+Mn) molar ratio of up to ∼0.21. Irrespective of metal type, the incorporation of a metal cation significantly alters the physicochemical properties of birnessite, such as decrease in the thickness of crystals along the <B>c</B> <SUP>∗</SUP> axis and coherent scattering domain sizes in the <B>a</B>–<B>b</B> plane and the Mn average oxidation state, increase in the specific surface area and the total amount of hydroxyl groups, in which the contents of hydroxyl groups around vacancies are decreased. The lattice parameters in the <B>a</B>–<B>b</B> plane tend to decrease in Al–incorporated birnessites but first significantly decrease and then increase in Fe-incorporated birnessites. In Fe-incorporated birnessites, ∼32–50% of the total Fe<SUP>3+</SUP> is located inside the Mn octahedral sheets (INC species). In Al–incorporated birnessites, the edge- and corner-sharing Mn–Mn distances gradually decrease. Density function theory (DFT) computation results support that the dominant species in Al–birnessite is a triple-corner-sharing complex on vacancies. The DFT geometry optimization further demonstrates that the in-plane cell size experimentally observed for these birnessites depends on not only the metal type but also its position in the mineral. The Al- or Fe-birnessites exhibit significantly increased adsorption capacities for Pb<SUP>2+</SUP> but reduced capacities for Zn<SUP>2+</SUP>. The metal incorporation effects on the chemical reactivity are discussed with the observed changes in the particle size and available vacancy sites.</P>