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Science China Chemistry 2024年第9期67卷 2941-2948页

作者： Yang-Ping Zhang Shao-Min Pei wen-Fa Chen bin-wen liu Xiao-Ming Jiang Guo-Cong Guo State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China

Non-centrosymmetric(NCS)structure is an indispensable prerequisite for second-order nonlinear optical(NLO)***,the mainstream approach for designing new NCS structures still relies on chemical substitution,necessitating an urgent infusion of fresh *** this work,two isomorphic sulfides AeMn_(6)Ga_(6)S_(16)(Ae=Ca,1;Sr,2)are afforded by modifying the skeleton of centrosymmetric(CS)Mn_(2)Ga_(2)S_(5) via introducing strong electropositive alkaline-earth ***,the incorporation of Ca^(2+)/Sr^(2+)cations allows the elementary[MnGaS_(9)]_(∞)chains to reconfigure into bumpy[MnS_(6)]-[GaS_(4)]layers in a new engagement manner,thus enabling the conversion from CS to NCS *** modifications cause not only strong second-harmonic generation(SHG)responses(~1.5×benchmark AgGaS_(2)@1,700 nm),but also significantly feasible bandgaps(2.60-2.64 e V)compared to the sulfide Mn_(2)Ga_(2)S_(5)(1.36 e V),which ultimately facilitate ultrahigh laser-induced damage thresholds(4.4-6.6×AgGaS_(2)@1,064 nm for compounds 1 and 2).The present study offers an ingenious approach for the transformation of CS to NCS structure.

关键词： second-harmonic generation non-centrosymmetrical structure NLO functional motif solid-state method

通过聚阳离子取代策略实现压缩黄铜矿型硒化物[Rb3BaCl][In_(8)Se_(14)]以获得优异的非线性光学性能

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Science China Materials 2024年第6期67卷 2000-2007页

作者：吴帆陈文发吴子璇姜小明刘彬文郭国聪 State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China University of Chinese Academy of Sciences Beijing 100049China Fujian College University of Chinese Academy of SciencesFuzhou 350002China

单价Ag+或Li+引入到类金刚石结构的MQ22-(M=Ga,In;Q=S,Se)阴离子基团中能合成出良好的二阶非线性光学(NLO)晶体材料.然而,这些晶体分别面临着较低的抗激光损伤阈值(LIDT)或二氧化硅易被腐蚀等缺点,严重限制了其在高功率激光应用中的实用... 详细信息

单价Ag+或Li+引入到类金刚石结构的MQ22-(M=Ga,In;Q=S,Se)阴离子基团中能合成出良好的二阶非线性光学(NLO)晶体材料.然而,这些晶体分别面临着较低的抗激光损伤阈值(LIDT)或二氧化硅易被腐蚀等缺点,严重限制了其在高功率激光应用中的实用性.在本研究中,基于类金刚石结构的ZnSe,我们采用[Se_(4)Zn_(13)]Se_(2)4→[ClRb_(3)Ba]Se_(24)非常规的聚阳离子取代策略,设计并合成了一种新型的盐包硫属化合物[Rb_(3)BaCl][In_(8)Se_(14)](1).化合物1属于压缩黄铜矿型硒化物并保持了与AgInSe_(2)相同的晶体对称性(I-42d空间群).值得注意的是,由于InSe_(4)四面体结构单元的平行排列,化合物1具有相位匹配的强二次谐波(SHG)响应(2.0倍于AgGaS_(2)@2.90μm).此外,聚阳离子[Rb_(3)BaCl]^(4+)的引入促进了光学带隙(2.02 eV)的增强,有效地避免了对2.09μm激光的双光子吸收;同时结合较低的热膨胀系数,使得化合物1表现出高的LIDT(3.2倍于AgGaS2@2.09μm).本研究验证了在类金刚石结构中进行聚阳离子取代的可行性,并成功获得了性能优异的中远红外NLO材料.

关键词： chalcogenide nonlinear optical material substitution strategy diamond-like structure structure-property relationship

Existence of Periodic Solutions for p-Laplacian Equation under the Frame of Fuoik Spectrum

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Acta Mathematica Sinica,English Series 2011年第3期27卷 545-554页

作者： wen bin liu Yong LI Department of Mathematics China University of Mining and Technology Xuzhou 221008 P. R. China College of Mathematics Jilin University Changchun 130012 P. R. China

In this paper, under the frame of Fuoik spectrum, we study the existence of periodic solutions for p-Laplacian equation by asymptotic behaviors of potential function, improve some results to some extent.

关键词： p-Laplacian equation periodic solution Fuoik spectrum potential function

A Buffer Scheduling Method Based on Message Priority in Delay Tolerant Networks

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Journal of Computer Science & Technology 2016年第6期31卷 1228-1245页

作者： En Wang Yong-Jian Yang Jie Wu wen-bin liu Department of Computer Science and Technology Jilin University Changchun 130012 China Department of Computer and Information Sciences Temple University Philadelphia 19122 U.S.A. Department of Software Jilin University Changchun 130012 China

Routing protocols in delay tolerant networks usually utilize multiple message copies to guarantee the message delivery, in order to overcome unpredictable node mobility and easily-interrupted connections. A store-carry-and-forward paradigm was also proposed to further improve the message delivery. However, excessive message copies lead to the shortage of buffer and bandwidth. The spray and wait routing protocol has been proposed to reduce the network overload caused by the buffer and transmission of unrestricted message copies. However, when a node＇s buffer is quite constrained, there still exist congestion problems. In this paper, we propose a message scheduling and drop strategy on spray and wait routing protocol （SDSRP）. To improve the delivery ratio, first of all, SDSRP calculates the priority of each message by evaluating the impact of both replicating and dropping a message copy on delivery ratio. Subsequently, scheduling and drop decisions are made according to the priority. In order to further increase delivery ratio, we propose an improved message scheduling and drop strategy on spray and wait routing protocol （ISDSRP） through enhancing the accuracy of estimating parameters. Finally, we conduct extensive simulations based on synthetic and real traces in ONE. The results show that compared with other buffer management strategies, ISDSRP and SDSRP achieve higher delivery ratio, similar average hopcounts, and lower overhead ratio.

关键词： delay tolerant network spray and wait buffer scheduling priority

Salt-inclusion chalcogenides:Double functional moieties design strategy toward excellent nonlinear optical materials

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Chinese Journal of Structural Chemistry 2023年第3期42卷 24-34页

作者： Chao-Hong Xie bin-wen liu Guo-Cong Guo State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian350002People's Republic of China University of Chinese Academy of Sciences Beijing100190People's Republic of China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China FuzhouFujian350108People's Republic of China

Nonlinear optical(NLO)material are of great importance in converting the frequency to extend the laser spectrum in mid-and far-infrared(IR)regions where lasers operate poorly or are ***,the contradiction between large second-harmonic generation(SHG)intensity and wide band gap(E_(g))is a long-standing problem for IR NLO *** address the issue,metal chalcogenides have been successfully synthesized and developed excellent optical properties in the past few *** a newly discovered category of chalcogenides,salt-inclusion chalcogenides with distinctive structures and brilliant performances have been placed great expecta-tions to be a novel *** this review,52 compounds in this thriving family are categorized via dimensions of host and guest parts,further discussing the relationships between their structures and NLO properties,as well as future perspectives of this family.

关键词： Salt-inclusion chalcogenide Nonlinear optical material Host and guest parts Structural crystal

Effects of angiotensin Ⅱ receptor antagonist, Losartan on the apoptosis, proliferation and migration of the human pancreatic stellate cells

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World Journal of Gastroenterology 2005年第41期11卷 6489-6494页

作者： wen-bin liu Xing-Peng Wang Kai Wu Ru-Ling Zhang Shanghai No. 1 People's Hospital Shanghai Jiaotong UniversityShanghai 200080 China

AIM： To investigate the effects of AT, （Type 1 angiotensin Ⅱ receptor） antagonist （Losartan） on the apoptosis, proliferation and migration of the human pancreatic stellate cells （hPSCs）. METHODS： hPSCs were isolated from pancreatic sample of patients with pancreatic carcinoma using radioimmunoassay （RIA） technique to detect the concentration of AngⅡ in culture media and cell homogenate. Immunocytochemistry （ICC） and in situ hybridization （ISH） methods were utilized to test AT1 expression in hPSCs. Effects of Losartan on hPSCs proliferation, apoptosis and migration were investigated using BrdU incorporation, TUNEL, flow cytometry （FCM）, and phase-contrast microscope separately when cells treated with Losartan. Immunofluorescence and Western blot were applied to quantify the expression of type Ⅰ collagen in hPSCs. RESULTS： There exists AT1 expression in hPSCs, while no AngⅡ was detected in culture media and cell homogenate. Losartan induces cell apoptosis in a doseand time-dependent manner （apparently at 10^-5 mol/L）, no pro-proliferative effect was observed in the same condition. Corresponding dosage of Losartan can also alleviate the motion capability and type Ⅰ collagen content of hPSCs compared with AngⅡ treatment and non-treatment control groups. CONCLUSION： These findings suggest that paracrine not autocrine functions of AngⅡ may have effects on hPSCs, which was mediated by AT1 expressed on cells, while Losartan may exert anti-fibrotic effects by inhibiting hPSCs motion and partly by inducing apoptosis.

关键词： Pancreatic stellate cell Angiotensin Ⅱ receptor Antagonist Losarta n

Successful treatment in one myelodysplastic syndrome patient with primary thrombocytopenia and secondary deep vein thrombosis:A case report

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World Journal of Clinical Cases 2022年第14期10卷 4640-4647页

作者： wen-bin liu Jian-Xiong Ma Hong-Xuan Tong Department of Hematology The First Affiliated Hospital of Zhejiang Chinese Medical UniversityHangzhou 310006Zhejiang ProvinceChina The Second Clinical Medical College Zhejiang Chinese Medical UniversityHangzhou 320000Zhejiang ProvinceChina Institute of Basic Theory for Chinese Medicine China Academy of Chinese Medical SciencesBeijing 100700China

BACKGROUND The contradictory process of coagulation and anticoagulation maintains normal physiological function,and platelets(PLTs)play a key role in hemostasis and *** severe thrombocytopenia and deep vein thrombosis(DVT)occur simultaneously,the physician will be confronted with a great challenge,especially when interventional thrombectomy *** SUMMARY We describe a 52-year-old woman who suffered from myelodysplastic syndrome with severe thrombocytopenia and protein S deficiency with right lower extremity *** this patient,the treatment of DVT was associated with numerous contradictions due to severe thrombocytopenia,especially when interventional thrombectomy was not ***,fondaparinux sodium effectively alleviated the thrombus status of the patient and gradually decreased the D-dimer *** addition,no increase in bleeding was *** application of eltrombopag stimulated the maturation and differentiation of megakaryocytes and increased the peripheral blood PLT *** clinical symptoms of DVT in the right lower extremities in this patient significantly *** patient resumed daily life activities,and the treatment effects were independent of PLT *** This is a contradictory and complex case,and fondaparinux sodium and eltrombopag may represent a good choice for the treatment of DVT in patients with severe thrombocytopenia.

关键词： Thrombocytopenia Deep vein thrombosis Fondaparinux sodium Thrombophilia Myelodysplastic syndrome Eltrombopag Case report

Strategy and technology to prevent hospital-acquired infections:Lessons from SARS,Ebola,and MERS in Asia and West Africa

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Military Medical Research 2017年第4期4卷 229-235页

作者： Sanjeewa Jayachandra Rajakaruna wen-bin liu Yi-Bo Ding Guang-wen Cao Department of Epidemiology Second Military Medical UniversityShanghai2oo433China

Hospital-acquired infections(HAIs) are serious problems for healthcare systems, especially in developing countries where public health infrastructure and technology for infection preventions remain undeveloped. Here, we characterized how strategy and technology could be mobilized to improve the effectiveness of infection prevention and control in hospitals during the outbreaks of Ebola, Middle East respiratory syndrome(MERS), and severe acute respiratory syndrome(SARS) in Asia and West Africa. Published literature on the hospital-borne outbreaks of SARS, Ebola, and MERS in Asia and West Africa was comprehensively reviewed. The results showed that healthcare systems and hospital management in affected healthcare facilities had poor strategies and inadequate technologies and human resources for the prevention and control of HAIs, which led to increased morbidity, mortality, and unnecessary costs. We recommend that governments worldwide enforce disaster risk management, even when no outbreaks are imminent. Quarantine and ventilation functions should be taken into consideration in architectural design of hospitals and healthcare facilities. We also recommend that health authorities invest in training healthcare workers for disease outbreak response, as their preparedness is essential to reducing disaster risk.

关键词： SARS Ebola MERS Infection control Hospital-acquired infections Strategy Technology

An Efficient Message Dissemination Scheme for Minimizing DeliveryDelay in Delay Tolerant Networks

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Journal of Computer Science & Technology 2018年第6期33卷 1101-1124页

作者： En Wang Wei-Shih Yang Yong-Jian Yang Jie Wu wen-bin liu Department of Computer Science and Technology Jilin University Changchun 130012 China Department of Mathematics Temple University Philadelphia PA 19122 U.S.A. Department of Computer and Information Science Temple University Philadelphia PA 19122 U.S.A.

Delay tolerant networks （DTNs） are a kind of sparse and highly mobile wireless networks, where no stableconnectivity guarantee can be assumed. Most DTN users have several points of interest （PoIs）, and they enjoy disseminatingmessages to the other users of the same PoI through WiFi. In DTNs, some time-sensitive messages （disaster warnings, searchnotices, etc.） need to be rapidly propagated among specific users or areas. Therefore, finding a path from the source tothe destination with the shortest delay is the key problem. Taking the dissemination cost into consideration, we proposean efficient message dissemination strategy for minimizing delivery delay （MDMD） in DTNs, which first defines the user＇sactiveness according to the transiting habit among different PoIs. Furthermore, depending on the activeness, an optimaluser in each PoI is selected to constitute the path with the shortest delay. Finally, the MDMD with inactive state （on theway between PoIs） is further proposed to enhance the applicability. Simulation results show that, compared with otherdissemination strategies, MDMD achieves the lowest average delay, and the comparable average hopcounts, on the premisethat the delivery ratio is guaranteed to be 100% by the sufficient simulation time.

关键词： delay tolerant network (DTN) point of interest (PoI) dissemination strategy minimizing delay

Spontaneous Infection and Periodic Evolving of Domain in a Diffusive SIS Epidemic Model

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Acta Mathematicae Applicatae Sinica 2024年第1期40卷 164-191页

作者： Qiang wen Guo-qiang Ren bin liu School of Mathematics and Statistics Huazhong University of Science and TechnologyWuhan430074China Hubei Key Laboratory of Engineering Modeling and Scientific Computing Huazhong University of Science and TechnologyWuhan430074China

In this paper, we consider a susceptible-infective-susceptible(SIS) reaction-diffusion epidemic model with spontaneous infection and logistic source in a periodically evolving domain. Using the iterative technique,the uniform boundedness of solution is established. In addition, the spatial-temporal risk index R0(ρ) depending on the domain evolution rate ρ(t) as well as its analytical properties are discussed. The monotonicity of R0(ρ)with respect to the diffusion coefficients of the infected dI, the spontaneous infection rate η(ρ(t)y) and interval length L is investigated under appropriate conditions. Further, the existence and asymptotic behavior of periodic endemic equilibria are explored by upper and lower solution method. Finally, some numerical simulations are presented to illustrate our analytical results. Our results provide valuable information for disease control and prevention.

关键词： diffusive SIS model spontaneous infection periodically evolving domain periodic endemic equilibrium