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Higher alcohols synthesis from syngas over lanthanum-promoted CuZnAl catalyst

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Journal of Energy Chemistry 2018年第1期27卷 319-325页

作者： Xuan Deng yong-jun liu Wei Huang Key Laboratory of Coal Sdence and Technology of Ministry of Education and Shanxi Province Taiyuan University of TechnologyTaiyuan 030024ShanxiChina Center of Information Management and Development Taiyuan University of TechnologyTaiyuan 030024ShanxiChina

CuZnAl catalysts with different La loadings were prepared by a complete liquid phase method and tested for higher alcohols（C_（2＋）OH） synthesis from syngas at the conditions of 250–290 ℃, 4.5 MPa, feed low rate = 150 mL/min and H_2/CO = 2. The catalysts were characterized by XRD, H_2-TPR, NH_3-TPD, N_2 adsorption, XPS, and TEM techniques. Characterization results showed that the incorporation of La into CuZnAl catalysts resulted in the decrease of crystallite size of Cu^0 and a strong interaction among copper and zinc or aluminum oxides. Especially, the incorporation of La increased the amount of weak acid and the Cu content on catalyst surface, which was speculated to contribute the formation of higher alcohols. Among these La-promoted CuZnAl catalysts, the La0.1 catalyst exhibited the best catalytic performance and the selectivity to higher alcohols reached above 60% when the reaction temperature was 290 ℃.

关键词： Syngas C2+OH CuZnAl La promoter Slurry bed reactor

Theoretical Investigation on Structures and Second-order Nonlinear Optical Properties of (Thiophene) Manganese Tricarbonyl Cations

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Chinese Chemical Letters 2002年第1期13卷 45-48页

作者： Ying liu Yu Hong GENG yong jun liu DepartmentofChemistry，QufuNormalUniversity Qufu273165

The structures of several recently reported organometallic NLO chromophores, (thio-phene) manganese tricarbonyl cations, were fully optimized at the DFT non-local (GGA) level. The calculated results show that the fragments 2-SC4H3CH=CHC6H4-R in these organometallic chromophores are not planar with dihedral angles of 42.2~59.8 between two aromatic rings, which are different from those of uncoordinated counterparts. Based on the DFT geometry opti-mization, the second-order nonlinear optical polarizabilities were calculated by using RPA method. The calculated results indicate that incorporation of +3Mn(CO) unit with thiophene leads to a sub-stantial increase in the second-order polarizability (b).

关键词： Organometallic chromophore nonlinear optical properties DFT method ZINDO (thio-phene) manganese tricarbonyl cation.

Magnetization Reversal in Magnetic Bilayer Systems

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Chinese Physics Letters 2019年第6期36卷 88-92页

作者： Li-Peng Jin yong-jun liu School of Physical Science and Technology Yangzhou University

Magnetization reversal in magnetic soft/hard bilayer systems is studied analytically by means of a variational method for magnetic energies in a continuum model. The demagnetization curve is involved with nonlinear equations,and the solution is given implicitly in the form of Jacobi functions,which is valid for the total reversal process. Based on the non-trivial solutions, hysteresis loops, as well as the maximum energy product(BH)_(max) versus thicknesses of soft/hard layers are obtained. With regard to(BH)_(max), improvement of the remanence competes with loss of coercive force. As a result, an optimum condition exists. For a given thickness of the hard layer, the optimum condition at which the largest(BH)_(max) could be achieved is discussed, which is slightly different from previous works.

关键词： Magnetization Reversal Magnetic Bilayer Systems magnetic energies

Situational awareness architecture for smart grids developed in accordance with dispatcher's thought process:a review

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Frontiers of Information Technology & Electronic Engineering 2016年第11期17卷 1107-1121页

作者： You-bo liu jun-yong liu Gareth TAYLOR Ting-jian liu Jing GOU Xi ZHANG School of Electrical Engineering and Information Sichuan UniversityChengdu 610065China Electronic and Computer Engineering Brunel UniversityLondon UB8 3PHUK State Grid Sichuan Power Economic Research Institute Chengdu 610014China

The operational environment of today's smart grids is becoming more complicated than ever before. A number of factors, including renewable penetration, marketization, cyber security, and hazards of nature, bring challenges and even threats to control centers. New techniques are anticipated to help dispatchers become aware of the accurate situations as they manipulate and navigate the situations as quickly as possible. To address the issues, we first introduce the background for this topic as well as the emerging technical demands of situational awareness in the dispatcher's environment. The general concepts and technical requirements of situational awareness are then summarized, aimed at offering an overview for readers to understand the state-of-the-art progress in this area. In addition, we discuss the importance of integrating the architecture of support tools in accordance with the dispatcher's thought process, which in fact guides correct and swift reactions in real-time operations. Finally, the prospects for situational awareness architecture are investigated with the goal of presenting situational awareness modules in an advanced and visualized manner.

关键词： Smart grid Situational awareness Dispatcher's thought process Technical architecture

Carbon emission impact on the operation of virtual power plant with combined heat and power system

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Frontiers of Information Technology & Electronic Engineering 2016年第5期17卷 479-488页

作者： Yu-hang XIA jun-yong liu Zheng-wen HUANG Xu ZHANG School of Electrical Engineering and Information Sichuan UniversityChengdu 610065China Brunel Institute of Power Systems Brunel UniversityLondon UB8 3PHUK Guangzhou Power Supply Bureau Guangzhou 510000China

A virtual power plant （VPP） can realize the aggregation of distributed generation in a certain region, and represent distributed generation to participate in the power market of the main grid. With the expansion of VPPs and ever-growing heat demand of consumers, managing the effect of fluctuations in the amount of available renewable resources on the operation of VPPs and maintaining an economical supply of electric power and heat energy to users have been important issues. This paper proposes the allocation of an electric boiler to realize wind power directly converted for supplying heat, which can not only overcome the limitation of beat output from a combined heat and power （CHP） unit, but also reduce carbon emissions from a VPP. After the electric boiler is considered in the VPP operation model of the combined heat and power system, a multi-objective model is built, which includes the costs of carbon emissions, total operation of the VPP and the electricity traded between the VPP and the main grid. The model is solved by the CPLEX package using the fuzzy membership function in Matlab, and a case study is presented. The power output of each unit in the case study is analyzed under four scenarios. The results show that after carbon emission is taken into account, the output of low carbon units is significantly increased, and the allocation of an electric boiler can facilitate the maximum absorption of renewable energy, which also reduces carbon emissions from the VPP.

关键词： Virtual power plant (VPP) Carbon emissions Electric boiler Wind power Combined heat and power (CHP)

Guards at the gate： physiological and pathological roles of tissue-resident innate lymphoid cells in the lung

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Protein & Cell 2017年第12期8卷 878-895页

作者： Hang Cheng Chengyan Jin Jing Wu Shan Zhu yong-jun liu Jingtao Chen Institute of Translational Medicine The First Hospital Jilin University Changchun 130061 China Department of Pediatrics The First Hospital JUin University Changchun 130021 China Department of Thoracic Surgery The Second Hospital Jilin University Changchun 130041 China Sanofi Research and Development Cambridge MA 02139 USA

The lung Is an Important open organ and the primary site of respiration. Many *** diseases develop in the lung, e.g., pneumonia, asthma, chronic obstructive pulmonary diseases （COPDs）, pulmonary fibrosis, and lung cancer. In the lung, innate Immunity serves as the frontline in both anti-irritant response and anti-tumor defense and is also critical for mucosal homeostasis; thus, it plays an important role In containing these pul- monary diseases. Innate lymphoid cells （ILCs）, charac. terized by their strict tissue residence and distinct function in the mucosa, are attracting Increased atten. tion In innate Immunity. Upon sensing the danger slg- nals from damaged epithelium, ILCs activate, proliferate, and release numerous cytoklnes with specific local functions; they also participate in mucosal immune- surveillance, Immune-regulation, and homeostasis. However, when their functions become uncontrolled, ILCs can enhance pathological states and Induce dis- eases. In this review, we discuss the physiologicel and pathological functions of ILC subsets 1 to 3 in the lung, and how the pathogenic environment affects the func- tion and plasticity of ILCs.

关键词： lung innate lymphoid cells pulmonarydiseases regional immunity

Recent advances in the role of toll-like receptors and TLR agonists in immunotherapy for human glioma

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Protein & Cell 2014年第12期5卷 899-911页

作者： Shuanglin Deng Shan Zhu Yuan Qiao yong-jun liu Wei Chen Gang Zhao Jingtao Chen Institute of Translational Medicine the First Hospital Jilin University Changchun 130031 China Department of Neurosurgery the First Hospital Jilin University Changchun 130031 China Medlmmune Gaithersburg MD 20878 USA Department of Hematology-Oncology and BMT Department of Pediatrics University of Minnesota Medical School Minneapolis MN 55455 USA

Gliomas are extremely aggressive brain tumors with a very poor prognosis. One of the more promising strat- egies for the treatment of human gliomas is targeted immunotherapy where antigens that are unique to the tumors are exploited to generate vaccines. The approach, however, is complicated by the fact that human gliomas escape immune surveillance by creating an immune suppressed microenvironment. In order to oppose the glioma imposed immune suppression, mol- ecules and pathways involved in immune cell matura- tion, expansion, and migration are under intensive clinical investigation as adjuvant therapy. Toll-like receptors （TLRs） mediate many of these functions in immune cell types, and TLR agonists, thus, are currently primary candidate molecules to be used as important adjuvants in a variety of cancers. In animal models for glioma, TLR agonists have exhibited antitumor proper- ties by facilitating antigen presentation and stimulating innate and adaptive immunity. In clinical trials, several TLR agonists have achieved survival benefit, and many more trials are recruiting or ongoing. However, a second complicating factor is that TLRs are also expressed on cancer cells where they can participate instead in a variety of tumor promoting activities including cell growth, proliferation, invasion, migration, and even stem cell maintenance. TLR agonists can, therefore, possibly play dual roles in tumor biology. Here, how TLRs and TLR agonists function in glioma biology and in anti-gli- oma therapies is summarized in an effort to provide acurrent picture of the sophisticated relationship of gli- oma with the immune system and the implications for immunotherapy.

关键词： glioma toll-like receptor agonist centralnervous system immunotherapy

Dynamics of an Ultracold Bose Gas in Funnel-Shaped Potential

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Communications in Theoretical Physics 2009年第9期52卷 431-434页

作者： YAN Li XU Guang-Yuan WANG yong-jun liu Xian-Feng HAN Jiu-Rong Department of Physics Yangzhou University Yangzhou 225002 China

In this paper we develop a variational theory to study the dynamic properties of ultracold Bose gas ina funnel external *** obtain one-dimensional nonlinear equation which describes the dynamics of transversetight confined bosonic gas from three-dimension to one-dimension,and find one-dimensional s-wave scattering lengthwhich depends on the shape of transverse confining *** the funnel trapping potential is strong enough at zerotemperature,all transverse excitations are *** find the dynamic equation which describes the Tonks-Girardeaugas and present a qualitative analysis of the experimental accessibility of the Tonks-Girardeau gas with funnel-trappedalkalic atoms.

关键词： funnel potential variational method ultracold Bose gas Tonks Girardeau region

Photonic lantern with multimode fibers embedded

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Research in Astronomy and Astrophysics 2014年第8期14卷 1046-1054页

作者： Hai-Jiao Yu Qi Yan Zong-jun Huang He Tian Yu Jiang yong-jun liu Jian-Zhong Zhang Wei-Min Sun Key Laboratory of In-Fiber Integrated Optics Ministry of EducationHarbin Engineering University

A photonic lantem is studied which is formed by seven multimode fibers inserted into a pure silica capillary tube. The core of the tapered end has a uniform refractive index because the polymer claddings are removed before the fibers are inserted. Consequently, the light distribution is also *** theories describing a slowly varying waveguide and multimode coupling are used to analyze the photonic lantern. The transmission loss decreases as the length of the tapered part increases. For a device with a taper length of 3.4 cm, the loss is about 1.06 dB on average for light propagating through the taper from an inserted fiber to the tapered end and 0.99 dB in the reverse direction. For a device with a taper length of 0.7 cm, the two loss values are 2.63 dB and 2.53 dB, respectively. The results show that it is possible to achieve a uniform light distribution with the tapered end and a low-loss transmission in the device if parameters related to the lantern are reasonably defined.

关键词： techniques radial velocities -- methods laboratory -- instrumentation spectrographs