Dynamics of waste-to-energy incineration R&D collaboration networks: a social network analysis based on patent data

Ding Ma,Yongsheng Yu,Si-shi Liu,Ya-rui Zhang 한국자원공학회 2017 Geosystem engineering Vol.20 No.2

The municipal solid waste in China is increasing at an unprecedented pace due to the upgrading urbanization and improving living standard. The waste-to-energy (WTE) incineration technology offers a viable and potentially profitable technical solution to this booming phenomenon. The highly complex and systematic nature of WTE technologies have led to the emergence of WTE innovation network in the past decade. This study applies complex network theory as well as social network analysis to investigate the social network structure evolution of WTE technologies in terms of global network properties, major actors’ centrality and collaboration relationships. Based on the data-set covering joint filing patents pertaining to waste heat over the period 2006–2015, this study finds that the overall WTE innovation network exhibits the properties of scale-free network with minority organizations linking to abundant organizations. A large fraction of major actors represent the first-movers in the WTE research and still control the technological trajectories. The collaboration relationships have moved toward higher level of multidisciplinary and larger technological distance. Overall, the evolution of WTE innovation network features a young state of industry with high regime dependence. Finally, some suggestions are proposed to shed light on benign development of WTE innovation network.

Transcriptome analysis of flower colour reveals the correlation between SNP and differential expression genes in Phalaenopsis

Ding Yu,Wang Ma-Yin,Yang Ding-Hai,Hao Dai-Cheng,Li Wei-Shi,Ling Peng,Xie Shang-Qian 한국유전학회 2023 Genes & Genomics Vol.45 No.12

Background Phalaenopsis is an important ornamental plant that has great economic value in the world flower market as one of the most popular flower resources. Objective To investigate the flower colour formation of Phalaenopsis at the transcription level, the genes involved in flower color formation were identified from RNA-seq in this study. Methods In this study, white and purple petals of Phalaenopsis were collected and analyzed to obtained (1) differential expression genes (DEGs) between white and purple flower color and (2) the association between single nucleotide polymorphisms (SNP) mutations and DEGs at the transcriptome level. Results The results indicated that a total of 1,175 DEGs were identified, and 718 and 457 of them were up- and down-regulated genes, respectively. Gene Ontology and pathway enrichment showed that the biosynthesis of the secondary metabolites pathway was key to color formation, and the expression of 12 crucial genes (C4H, CCoAOMT, F3’H, UA3’5’GT, PAL, 4CL, CCR, CAD, CALDH, bglx, SGTase, and E1.11.17) that are involved in the regulation of flower color in Phalaenopsis. Conclusion This study reported the association between the SNP mutations and DEGs for color formation at RNA level, and provides a new insight to further investigate the gene expression and its relationship with genetic variants from RNA-seq data in other species.

Two-Dimensional Unilamellar Cation-Deficient Metal Oxide Nanosheet Superlattices for High-Rate Sodium Ion Energy Storage

Xiong, Pan,Zhang, Xiuyun,Zhang, Fan,Yi, Ding,Zhang, Jinqiang,Sun, Bing,Tian, Huajun,Shanmukaraj, Devaraj,Rojo, Teofilo,Armand, Michel,Ma, Renzhi,Sasaki, Takayoshi,Wang, Guoxiu American Chemical Society 2018 ACS NANO Vol.12 No.12

<P>Cation-deficient two-dimensional (2D) materials, especially atomically thin nanosheets, are highly promising electrode materials for electrochemical energy storage that undergo metal ion insertion reactions, yet they have rarely been achieved thus far. Here, we report a Ti-deficient 2D unilamellar lepidocrocite-type titanium oxide (Ti<SUB>0.87</SUB>O<SUB>2</SUB>) nanosheet superlattice for sodium storage. The superlattice composed of alternately restacked defective Ti<SUB>0.87</SUB>O<SUB>2</SUB> and nitrogen-doped graphene monolayers exhibits an outstanding capacity of ∼490 mA h g<SUP>-1</SUP> at 0.1 A g<SUP>-1</SUP>, an ultralong cycle life of more than 10000 cycles with ∼0.00058% capacity decay per cycle, and especially superior low-temperature performance (100 mA h g<SUP>-1</SUP> at 12.8 A g<SUP>-1</SUP> and −5 °C), presenting the best reported performance to date. A reversible Na<SUP>+</SUP> ion intercalation mechanism without phase and structural change is verified by first-principles calculations and kinetics analysis. These results herald a promising strategy to utilize defective 2D materials for advanced energy storage applications.</P> [FIG OMISSION]</BR>

Chaos and Predictable Time-Scale of the Brown Planthopper Nilaparvata Lugens(St${\aa}$l) Occurrence System

Ma, Fei,Ding, Zongze,Cheng, Xianian Korean Society of Applied Entomology 2001 Journal of Asia-Pacific Entomology Vol.4 No.1

The brown planthopper (BPH: Nilaparvata lugens(St${\aa}$l) occurrence time series data from June to November of 1986-1998 in Taihu Lake area, Jingsu province, China, were used to calculate correlation dimension ($D_2$(m)) and the second-order Renyientropy($k_2$). Based on the methods of the approximation Kolmogorov's entropy and phase space extension, the average predictable time scale of BPH occurrence system was computed. The results indicate that the BPH occurrence system is a chaotic system with fractal dimension ($D_2$(m)) form 4.34 to 4.43 and saturation embedding dimension $m_c =10$. And it could be inferred that the BPH occurrence evolution would be described by 5-10 steps required by the development of these chaotic attractors in the multi-dimensional phase space. The average predictable time scale is about 114.0-253.2 days, and the really predictable time scale of 79.0-175.5 days resulted from the e-folding expansion of trajectories in phase space. The effect of the lag time $\tau$ was examined during the continuation of phase space. And it was found that ($D_2$(m)) is convergent with respect to $\tau$. While the BPH occurrence time series data every four days were analyzed by the continuation of phase space with $\tau$=5, the coordinate components was independent of each other, and the dynamically characteristic quantity of the system was stable and reliable.

Three-dimensional mapping of the anisotropic magnetoresistance in Fe₃O₄ single crystal thin films

Ding, Z.,Li, J. X.,Zhu, J.,Ma, T. P.,Won, C.,Wu, Y. Z. American Institute of Physics 2013 JOURNAL OF APPLIED PHYSICS - Vol.113 No.17

<P>The anisotropic magnetoresistance (AMR) effect with a magnetic field along arbitrary directions in single crystalline (001)-oriented Fe3O4 films was studied. A cubic symmetry term, an in-plane uniaxial term, and an out-of-plane uniaxial term could be quantitatively separated. The cubic term is independent of the current direction, and decreases with increasing temperature, but both in-plane and out-of-plane uniaxial terms are found to be strongly dependent on the current orientation. This three-dimensional magnetoresistance measurement provides a quantitative method for identifying the different contributions to the AMR effect. (C) 2013 American Institute of Physics.</P>

Microstructure evolution and effect on deuterium retention in oxide dispersion strengthened tungsten during He⁺ irradiation

Ding, Xiao-Yu,Xu, Qiu,Zhu, Xiao-yong,Luo, Lai-Ma,Huang, Jian-Jun,Yu, Bin,Gao, Xiang,Li, Jian-Gang,Wu, Yu-Cheng Korean Nuclear Society 2020 Nuclear Engineering and Technology Vol.52 No.12

Oxide dispersion-strengthened materials W-1wt%Pr₂O₃ and W-1wt%La₂O₃ were synthesized by wet chemical method and spark plasma sintering. The field emission scanning electron microscopy (FE-SEM) analysis, XRD and Vickers microhardness measurements were conducted to characterize the samples. The irradiations were carried out with a 5 keV helium ion beam to fluences up to 5.0 × 10²¹ ions/m² under 600 ℃ using the low-energy ion irradiation system. Transmission electron microscopy (TEM) study was performed to investigate the microstructural evolution in W-1wt%Pr₂O₃ and W-1wt%La₂O₃. At 1.0 × 10²⁰ He⁺/m², the average loops size of the W-1wt%Pr₂O₃ was 4.3 nm, much lower than W-1wt% La₂O₃ of 8.5 nm. However, helium bubbles were not observed throughout in both doped W materials. The effects of pre-irradiation with 1.0 × 10²¹ He⁺/m² on trapping of injected deuterium in doped W was studied by thermal desorption spectrometry (TDS) technique using quadrupole mass spectrometer. Compared with the samples without He⁺ pre-irradiation, deuterium (D) retention of doped W materials increased after He⁺ irradiation, whose retention was unsaturated at the damage level of 1.0 × 10²²D₂⁺/m². The present results implied that irradiation effect of He⁺ ions must be taken into account to evaluate the deuterium retention in fusion material applications.

MiR-601 inhibited small cell lung cancer progression by modulating SIRT1

Ding Hao,Gong Chenhu,Zhang Zhihong,Xu Hui,Ma Chunping 대한독성 유전단백체 학회 2023 Molecular & cellular toxicology Vol.19 No.3

Background Dysfunction of microRNAs (miRNAs) contribute to small cell lung cancer (SCLC) progression. Accumulating evidence indicated miR-601, acted as a tumor suppressor gene, has shown an altered expression pattern in multiple cancers. However, little was known about in terms of the function of miR-601 during SCLC progression. Objective Our project intended to illustrate the functions of miR-601 during the development and metastasis of SCLC. Results We found a decreased expression of miR-601 in SCLC tumor tissues and cell lines. Moreover, functional studies suggested that miR-601 overexpression resulted in a reduced cell growth and induced apoptosis of SCLC cells. Notably, sirtuin 1 (SIRT1) was identifi ed as a putative target of miR-601. MiR-601 suppressed SIRT1 expression via interacting with the 3′-untranslated region (UTR) of SIRT1 in SCLC cells. Also, SIRT1 expression was negatively associated with that of miR-601 in SCLC tissues. The restoration of SIRT1 alleviated the inhibitory eff ect of miR-601 on SCLC progression. Conclusion Our data documented the tumor-suppressive function of miR-601 in SCLC via targeting SIRT1, suggesting miR-601 as a new potential therapeutic approach for SCLC treatment.

Energy-saving optimization on active disturbance rejection decoupling multivariable control

Ding Da-Min,Yang Hai-Ma,Liu Jin,Zhang Da-Wei,Jiang Xiao-Hui 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.3

An industrial control process multiple-input multiple-output (MIMO) coupled system is analyzed in this study as an example of a Loss of Coolant Accident (LOCA) simulation system. Ordinary control algorithms can complete the steady state of the control system and even reduce the response time to some extent, but the entire system still consumes a large amount of energy after reaching the steady state. So a multivariable decoupled energy-saving control method is proposed, and a novel energy-saving function (economic function, Eco-Function) is specially designed based on the active disturbance rejection control algorithm. Simulations and LOCA simulation system tests show that the Eco-function algorithm can cope with the uncertainty of the multivariable system's internal parameters and external disturbances, and it can save up to 67% of energy consumption in maintaining the parameter steady state.

Tuning the Energy Levels of Aza-Heterocycle-Based Polymers for Long-Term <i>n</i>-Channel Bottom-Gate/Top-Contact Polymer Transistors

Ma, Suxiang,Zhang, Guobing,Wang, Feifei,Dai, Yanrong,Lu, Hongbo,Qiu, Longzhen,Ding, Yunsheng,Cho, Kilwon American Chemical Society 2018 Macromolecules Vol.51 No.15

<P>Conjugated polymer-based organic thin film transistors (OTFTs) have received tremendous attention due to their potential applications. In addition to their high performances, air stability is also essential for application and another main property that OTFTs have. In this paper, three aza-heterocycle (BABDF)-based polymers were designed and synthesized using strong donor thiophene-vinylene-thiophene (TVT), weak donor thiophene-cyanovinylene-thiophene (TCNT), and weak acceptor dithiazole (TZ) as co-units. The lowest unoccupied molecular orbital (LUMO)/highest occupied molecular orbital (HOMO) energy levels were effectively lowered by introducing TCNT and TZ units, especially for PBABDF-TZ, for which the too much deep LUMO/HOMO energy levels of −4.28/-6.06 eV were obtained. These levels are low enough for air-stable electron transport and large enough for the hole injection barriers in OTFTs. Consequently, the unencapsulated bottom-gate/top-contact (BG/TC) devices exhibited unipolar electron transport under air conditions. Furthermore, these devices had high air stability and maintained unipolar electron transport with a mobility of up to 0.01 cm<SUP>2</SUP> V<SUP>-1</SUP> s<SUP>-1</SUP> during the one-year characterization period. Very low LUMO and HOMO levels were necessary for electron transport and the hole barriers, respectively, and both were important for long-term, air-stable <I>n</I>-channel polymer transistors.</P> [FIG OMISSION]</BR>

Rapid Detection of Trace 1,4-Dichlorobenzene Using Laser Mass Spectrometry

Ding, Lei,Ma, Jing,Zheng, Haiyang,Fang, Li,Zhang, Weijun,Kim, Duk-Hyeon,Cha, Hyung-Ki Korean Chemical Society 2006 Bulletin of the Korean Chemical Society Vol.27 No.9

The 1+1 two-photon Resonant Enhanced Multiphoton Ionization (REMPI) spectra of 1,4-dichlorobenzene was obtained from 240 nm through to 250 nm on a laser mass spectrometer. Special care was taken to build up a heatable sample inlet system suitable for detecting a trace semi-volatile organic compound and reducing the memory effort on the inner wall of the inlet system. The detection limits of 1,4-dichlorobenzene in ppbV/V concentration range at certain wavelengths are presented.