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| 1 | Two-Stage Hydrogenation Modification of C_9 Petroleum Resin over NiWS/γ-Al_2O_3 and PdRu/γ-Al_2O_3 Catalysts in Series显示文摘Hydrogenation modification is one of the most important ways to produce high-quality petroleum resin.The colorless C9 petroleum resin(C9PR) was obtained by two-stage catalytic hydrogenation over NiWS/γ-Al2O3 catalyst and PdRu/γ-Al2O3 catalyst connected in series.Via the hydrogenation reaction,aromatic rings in C9PR were converted to alicyclic rings,and its color was reduced from Gardner color grade No.11 to Gardner color grade No.0.The optimum Ni/W atomic ratio was found to be close to 0.23,while the optimum Pd/Ru atomic ratio was close to 3.80.The TEM results showed that the morphology and size of sulfide or metal particles of the two kinds of catalysts remained almost unchanged after the reaction was carried our for 1 204 hours,attesting to their good catalytic stability. | Yu Lujun Jiang Dahao Xu Jiao Ma Lei Li Xiaonian | 2012 | China Petroleum Processing & Petrochemical Technology2012，14，3： | 7 |
| 2 | Highly Active and Stable Ni_2P/SiO_2 Catalyst for Hydrogenation of C_9 Petroleum Resin显示文摘Catalytic hydrogenation is an appropriate method for the improvement of C9 petroleum resin(C9PR) quality. In this study, the Ni2P/SiO2(containing 10% of Ni) catalyst prepared by the temperature-programmed reduction(TPR) method was used for hydrogenation of C9 petroleum resins. The effect of reaction conditions on catalytic performance was studied, and the results showed that the optimum reaction temperature, pressure and liquid hourly space velocity(LHSV) was 250 ℃, 6.0 MPa, and 1.0 h-1, respectively. The bromine numbers of hydrogenated products were maintained at low values(250 mg Br/100g) within 300h, showing the high activity and stability of Ni2P/SiO2 catalyst. The fresh and spent catalysts were characterized by X-ray diffraction(XRD), BET surface area(BET) analysis, scanning electron microscopy(SEM), transmission electron microscopy(TEM), Fourier transform infrared(FTIR) pyridine adsorption, and X-ray photoelectron spectroscopy(XPS). Compared with the traditional sulfurated-Ni W catalysts, Ni2P possessed globe-like structure instead of layered structure like the active phase of Ni WS, thereof exposing more active sites, which were responsible for the high activity of Ni2P/SiO2 catalyst. The stability of Ni2P/SiO2 catalyst was probably attributed to its high sulfur tolerance, antisintering, anti-coking and carbon-resistance ability. These properties might be further ascribed to the special Ni-P-S surface phase, high thermal stability of Ni2P nanoparticles and weak surface acidity for the Ni2P/SiO2 catalyst. | Jiang Lin Feng Feng Jiang Dahao Guan Zhengyu Li Xiaonian | 2016 | China Petroleum Processing & Petrochemical Technology2016，18，1： | 4 |
| 3 | Repair calvarial defect of osteoporotic rats by berberine functionalized porous calcium phosphate scaffold显示文摘In this article,we propose a simple scheme of using berberine(BBR)to modify porous calcium phosphate ceramics(named PCPC).These BBR molecules regulate the crystallization of hydroxyapatite nanorods on PCPC.We found that these nanorods and the adsorbed BBR changed the interface micro-environment of PCPC by SEM images.The microenvironment of PCPC surface is essential for promoting BMSCs’proliferation and differentiation.These results demonstrated that PCPC/BBR markedly improved the bone regeneration of osteoporosis rats.Moreover,PCPC/BBR had significantly increased the expression levels of ALP,osteocalcin and bone morphogenetic protein2 and RUNX2 in BMSCs originated from osteoporosis rats. | Dahao Wang Peng Zhang Xifan Mei Zhenhua Chen | 2021 | Regenerative Biomaterials2021，8，3： | 2 |
| 4 | Study of mechanism of strengthening materials mechanism with laser shock processing显示文摘 | Guo Dahao Wu Hongxing Wang Sengbo | 1999 | Science in China (Series E)1999，42，3： | 1 |
| 5 | Study on Ni-Re-K/Al 2 O 3 catalysts for synthesis of N , N ′-di- sec -butyl p -phenylene diamine from p -nitroaniline and 2-butanone显示文摘 | Zhendong Pan Yunjie Ding Dahao Jiang Xianming Li Guiping Jiao Hongyuan Luo | 2007 | Applied Catalysis A, General2007，，： | 1 |
| 6 | Cu-Zn-Al mixed metal oxides derived from hydroxyl carbonate precursors for H2S removal at low temperature显示文摘 | Jiang Dahao Su Lianghu Ma Lei | 2010 | Applied Surface Science2010，256，： | 1 |
| 7 | CO Hydrogenation to C2-oxygenates over Rh–Mn–Li/SiO2 Catalyst: Effects of Support Pretreatment with nC1–C5 Alcohols显示文摘 | Dahao Jiang Yunjie Ding Zhendong Pan Weimiao Chen Hongyuan Luo | 2008 | Catalysis Letters (-)2008，，3： | 1 |
| 8 | Shanghai's experience on utilizing the for jointed concrete pavement rehabilitation显示文摘 | Chen Dahao Huang Qinlong Ling Jianming | | 0，，06： | 1 |
| 9 | Titanium-Promoted Rh-Mn-Li/SiO_(2) for C_(2)-Oxygenates Synthesis from Syngas: Effect of Low Titanium Loading显示文摘Addition of small amounts of Ti oxide to Rh-Mn-Li/SiO2 catalysts unexpectedly results in an increase in their activity for C2-oxygenates production from syngas. Continuously increasing Ti loading depresses catalyst activity. The effect of Ti at low level on the catalytic properties in the CO/H2 reaction has been studied by various techniques. The characterization results indicate that the existence of Ti species has no effect on the ability of Rh to dissociate CO molecules and on the Rh dispersion. On the other hand, it is shown that trace amount of Ti strengthens the adsorption of CO and increases the amount of strongly adsorbed CO that can be hydrogenated and therefore improves the activity. The Rh- Mn interaction intensity, which can be regulated by Ti doping, seems to be the main reason to achieve higher yield of the desired reaction products. | Weimiao Chen Yunjie Ding Dahao Jiang Zhendong Pan Hongyuan Luo | 2005 | Journal of Natural Gas Chemistry2005，14，4： | 1 |
| 10 | Quality Evaluation of Urban Pseudo Habitat Environments Based on the Degree of Public Praise from dianping.com:A Case Study of Liaoning Province显示文摘Due to the continuous development of information technology, people's perception of real life is more based on the information acquired on the real environment with the help of various media, rather than intuition. Based on priority evaluation data obtained from dianping.com(Liaoning Province), and the established criteria for assessing pseudo habitat environment quality, this study uses the entropy method to calculate and rank the comprehensive score of each merchant's word-of-mouth evaluation. It analyzes the spatial pattern and differentiation characteristics of pseudo environment quality, as well. Results show that:(1) The overall quality scores of the pseudo living environment in southern, central, and northern Liaoning are higher than those in eastern and western area. The pseudo habitat environment quality score of coastal cities is relatively higher than that of inland cities; and that of cities with high resource depletion is lower.(2) Parent-child activity, learning and training, and sports & health have significant impact, whereas hotels and peripheral tours have less impact on the pseudo habitat environment quality in Liaoning province. The overall pseudo habitat environment quality score of a city is inversely proportional to the total scores of various indicators in the city.(3) The spatial distribution of pseudo habitat quality in Liaoning Province shows a 'saddle' structure. The spatial heterogeneity of the pseudo habitat environment in central and northern Liaoning areas is larger than that in eastern, western, and southern areas of Liaoning. The degree of quality of the pseudo habitat environment is proportional to the size of its spatial differentiation degree in total. | ZHANG Dahao LI Xueming | 2018 | Journal of Landscape Research2018，10，6： | 0 |
| 11 | Gold nanoclusters conjugated berberine reduce inflammation and alleviate neuronal apoptosis by mediating M2 polarization for spinal cord injury repair显示文摘Spinal cord injury(SCI)leads to nerve cell apoptosis and loss of motor function.Herein,excessive activation of the M1 phenotype macrophages/microglia is found to be the main reason for the poor prognosis of SCI,but the selective activation phenotype(M2)macrophages/microglia facilitates the recovery of SCI.Thereafter,we used gold nanoclusters loaded berberine(BRB-AuNCs)to reduce inflammation by inhibiting the activation of M1 phenotype macrophages/microglia,which simultaneously inhibited neuronal apoptosis after SCI.In vitro and in vivo experiments showed that BRB-AuNCs reduced M1 protein marker CD86,increased M2 protein marker CD206,reduced inflammation and apoptotic cytokines(IL-1β,IL-6,TNF-α,Cleaved Caspase-3 and Bax).These results indicate that BRB-AuNCs have excellent anti-inflammatory and anti-apoptotic effects by inducing the polarization of macrophages/microglia from M1 phenotype to M2 phenotype.Thereafter,the motor functions of SCI rats were significantly improved after treatment with BRB-AuNCs.This work not only provides a new way for the treatment of SCI but also broadens BRB utilization strategies. | Zipeng Zhou Dan Li Xiangyi Fan Yajiang Yuan Hongyu Wang Dahao Wang Xifan Mei | 2022 | Regenerative Biomaterials2022，9，1： | 0 |
| 12 | Urban Agglomerations in China: Characteristics and Influencing Factors of Population Agglomeration显示文摘Urban agglomeration(UA)is an advanced spatial economic form formed and developed in the process of rapid industrialization and urbanization,and an important carrier of urbanization and economic development.The economy has developed rapidly in the recent decades of China,and the UAs have also developed rapidly.However,as a large population country,the population distribution and changes of UAs in China has unique characteristics.Using the fifth,sixth and seventh population census data,spatial auto-correlation and spatial econometric models,we analyzed the spatial-temporal evolution characteristics and influencing factors of population agglomeration in China’s UAs.Results revealed that:1)from 2000 to 2020,the population gradually converged into UAs,and the characteristics of population agglomeration in different development degree of UAs differ.The higher the development degree of UA,the higher the population agglomeration degree.Besides,UAs are the main area with the most significant population agglomeration degree,and the spatial autocorrelation show that the cities with similar degree tend to be concentrated in space.The urban population gathering in UAs has a certain positive spillover effect on population size of neighboring cities.2)Economic development and social conditions factors are important factors affecting population agglomeration degree in UAs.The main factors of population gather into UAs are similar with the outside UAs,but the positive promotion of urbanization rate and proportion of tertiary industry in GDP on population agglomeration of UAs in China are enhancing from 2000 to 2020.Meanwhile,the other factors,such as high-quality public services,good urban living environment conditions,high-quality medical and educational resources,are also important factors to promote urban population gather into UAs.This study provides a basis for formulating the development planning of UAs in China,and enriches the relevant theoretical research of population evolution and influencing factors of UAs. | CAO Yongwang ZHANG Rongrong ZHANG Dahao ZHOU Chunshan | 2023 | Chinese Geographical Science2023，33，4： | 0 |
| 13 | A Image Copyright Protection Method Using Zero-Watermark by Blockchain and IPFS显示文摘Behind the popularity of multimedia technology,the dispute over image copyright is getting worse.In the digital watermark prevention technology for copyright infringement,watermark technology is considered to be an important technology to overcome data protection problems and verify the relationship between data ownership.Among the many digital watermarking technologies,zero watermarking technology has been favored in recent years.However,the existing zero watermark technology in the implementation process often needs a trusted third party to store watermarks,which may make the data too central,data storage security is low and copyright registration costs are too high,which creates a rare problem.The decentivization and information cannot be tampered of blockchain technology’s nature find new methods for image copyright protection.This paper studies the role of zero watermark algorithm in the image copyright and its complete storage and certification scheme,proposes a zero watermark image protection framework based on blockchain,and builds a system according to the framework.Combined with blockchain and zero watermarking technology,the framework uses inter IPFS(Inter Planetary File System)to solve the problem of blockchain efficient storage and sharing of large files.In addition,the application of user copyright information,image image query and image trading in the system are realized based on smart contracts,which solves the problem of lack of trusted third parties.Experiments show that the scheme is feasible and robust to various attacks. | Tao Chen Zhao Qiu Gengquan Xie Lin Yuan Shaohua Duan Hao Guo Dahao Fu Hancheng Huang | 2021 | Journal of Information Hiding and Privacy Protection2021，3，3： | 0 |
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