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Simple aspects of femtosecond stimulated Raman spectroscopy

Science China Chemistry 2011年第12期54卷 1989-2008页

作者： ZHAO bin niu Kai LI XiuTing LEE Soo-Ying Division of Physics ＆ Applied Physics School of Physical ＆ Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore Division of Chemistry ＆ Biological Chemistry School of Physical ＆ Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore

Femtosecond stimulated Raman spectroscopy （FSRS）, using an overlapping pair of narrow band Raman pump and broadband probe pulses with heterodyne detection along the probe pulse direction, is a new nonlinear spectroscopic technique to record vibrational spectra of even highly fluorescent molecules and to study vibrational dynamics on excited electronic states of molecules, as in photoisomerization. FSRS is described by diagrammatic third-order perturbation theory with wave packet analysis. The phase matching condition gives rise to forty-eight terms for FSRS, but the resonant condition reduces it to just eight terms, which can be depicted by Feynman dual time-line diagrams, or closed time path loop diagrams, or the complementary four-wave mixing energy level diagrams. The eight terms fall into four sets-SRS（I）, SRS（Ⅱ）, IRS（I）, IRS（Ⅱ）-where SRS stands for stimulated Raman scattering and IRS stands for inverse Raman scattering. The SRS（I） set can also account for spontaneous Raman scattering, but the remaining SRS（Ⅱ）, IRS（I） and IRS（Ⅱ） terms are only present in stimulated scattering with the presence of a probe field. The SRS（I） set accounts for the Stokes Raman lines while the IRS（I） term accounts for the anti-Stokes lines, relative to the Raman pump frequency, in the FSRS spectrum. The remaining SRS（Ⅱ） and IRS（Ⅱ） terms give rise to broad baselines. Using a harmonic oscillator model, analytic results are obtained for the four-time correlation functions in the third-order polarizations. The issue of high time and high frequency resolution in time-resolved FSRS spectra is discussed. Calculations are made with the theory to compare with experimental results for：（a） resonance FSRS of fluorescent Rhodamine 6G and （b） 2D-FSRS from a coherent vibrational state that has been prepared by an impulsive, off-resonant pump pulse on CDCl3. The calculated results compared well with experimental results, and in the case of 2D-FSRS on CDCl3 there is a dominant cascade effect contribu

关键词： femtosecond stimulated Raman spectroscopy temporal and spectral resolution cascade effect

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Development of a computed tomography-based radiomics nomogram for prediction of transarterial chemoembolization refractoriness in hepatocellular carcinoma

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World Journal of Gastroenterology 2021年第2期27卷 189-207页

作者： Xiang-Ke niu xiao-Feng He Department of Interventional Radiology Nanfang HospitalSouthern Medical UniversityGuangzhou 510515Guangdong ProvinceChina Department of Interventional Radiology Affiliated Hospital of Chengdu UniversityChengdu 610081Sichuan ProvinceChina

BACKGROUND Some patients with hepatocellular carcinoma(HCC)are more likely to experience disease progression despite continuous transarterial chemoembolization(TACE),which is called TACE *** present,it is still difficult to predict TACE refractoriness,although some models/scoring systems have been *** present,radiological-based radiomics models have been successfully applied to predict cancer patient *** To develop and validate a computed tomography(CT)-based radiomics nomogram for the pre-treatment prediction of TACE *** This retrospective study consisted of a training dataset(n=137)and an external validation dataset(n=81)of patients with clinically/pathologically confirmed HCC who underwent repeated TACE from March 2009 to March *** features were retrospectively extracted from preoperative CT images of the arterial *** pre-treatment radiomics signature was generated using least absolute shrinkage and selection operator Cox regression analysis.A CT-based radiomics nomogram incorporating clinical risk factors and the radiomics signature was built and verified by calibration curve and decision curve *** usefulness of the CT-based radiomics nomogram was assessed by Kaplan-Meier curve *** used the concordance index to conduct head-to-head comparisons of the radiomics nomogram with the other four models(Assessment for Retreatment with Transarterial Chemoembolization score;α-fetoprotein,Barcelona Clinic Liver Cancer,Child-Pugh,and Response score;CT-based radiomics signature;and clinical model).All analyses were conducted according to the transparent reporting of a multivariable prediction model for individual prognosis or diagnosis *** The median duration of follow-up was 61.3 mo(interquartile range,25.5-69.3 mo)for the training cohort and 67.1 mo(interquartile range,32.4-71.3 mo)for the validation *** median number of TACE sessions was 4(range,3-7)in both cohorts.E

关键词： Hepatocellular carcinoma Transarterial chemoembolization Refractoriness Radiomics Nomogram Computed tomography

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Drivers of farmers’behavior toward compensation scheme for cultivated land protection in chengdu pilot area,China

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Ecosystem Health and Sustainability 2021年第1期7卷 416-431页

作者： Haipeng niu Dongyang xiao Suxia Zhao Department of Land Resources Management School of Surveying and Land Information Engineering of Henan Polytechnic UniversityJiaozuoChina Department of Arable Land Protection and Land Spatial Planning in the Yellow River Basin Research Centre of Arable Land Protection and Urban-Rural HighQuality Development of Yellow River BasinHenan Polytechnic UniversityJiaozuoChina

Studying farmers’behavior affected by economic incentive is necessary to promote positive behavior among farmers toward protecting the quantity,quality,and ecological environment of cultivated *** this study,we investigated the current situation regarding economic incentive policies for cultivated land protection,which has attracted the attention of Chinese ***,we focused on the earliest pilot scheme(i.e.,Cultivated Land Protection Fund,CLPF)implemented in the west of China since 2008 to empirically analyze farmers’*** analysis and path analysis methods were applied,with data collected from 296 *** results showed that positive actions,including the enhancement of initiatives to protect cultivated land,the improvement of ecological environment of cultivated land,and the investment in agricultural infrastructure,have been adopted by farmers since the implementation of the ***,gender,education level,labor force size,cultivated land area,migration out of traditional farming areas,average annual household income,and farmers’knowledge of the policy impacted significantly on farmers’*** the premise of comprehensive consideration of the diversity of farmers’livelihoods,new communication technologies and sufficient funds,we suggested that a long-term and sustainable project should be established at the national level to effectively compensate farmers.

关键词： Farmers’behavior ecological environment compensation influencing factors cultivated land protection

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Black soldier fly:A new vista for livestock and poultry manure management

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Journal of Integrative Agriculture 2021年第5期20卷 1167-1179页

作者： ZHANG Ji-bin ZHANG Jia LI Jia-hui Jeffery KTOMERLIN xiao xiao-peng Kashif ur REHMAN CAI Min-min ZHENG Long-yu YU Zi-niu State Key Laboratory of Agricultural Microbiology/National Engineering Research Center of Microbial Pesticides/College of Life Science and Technology Huazhong Agricultural UniversityWuhan 430070P.R.China Department of Entomology Texas A&M UniversityTX 77843USA Livestock and Dairy Development Department Poultry Research InstituteRawalpindi 46000Pakistan

The number of intensive livestock and poultry farms is expected to increase substantially in future because of consumer ***,such demand also results in a great deal of manure being generated,which threatens the environment if it is not properly *** developments in biotransformation of these wastes with the black soldier fly(BSF),Hermetia illucens(L.)(Diptera:Stratiomydiae),demonstrates such concerns can be abated,while also producing products(e.g.,protein,chitin,biodiesel,and fertilizer)of *** this review,we analyzed the factors influencing black soldier fly larvae(BSFL)conversion processes,the role of microorganisms,and the mechanisms used by BSFL when converting livestock and poultry manure into these valuable *** effects of BSFL conversion technology on reducing the hazards of such materials and their associated pathogens are reviewed,and the economics of livestock and poultry manure conversion by BSF larvae is discussed.

关键词： black soldier fly livestock and poultry manure conversion mechanism resource utilization

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Progress in Bio‑inspired Anti‑solid Particle Erosion Materials:Learning from Nature but Going beyond Nature

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Chinese Journal of Mechanical Engineering 2020年第3期33卷 5-31页

作者： Shuaijun Zhang Junqiu Zhang bin Zhu Shichao niu Zhiwu Han Luquan Ren Key Laboratory of Bionic Engineering(Ministry of Education) Jilin UniversityChangchun 130022China Department of Mechanical Engineering Sciences University of SurreyGuildfordSurrey GU27XHUK.

Solid particle erosion is a common phenomenon in engineering fields,such as manufacturing,energy,military and ***,with the rising industrial requirements,the development of anti-solid particle erosion materials remains a great *** billions of years of evolution,several natural materials exhibit unique and exceptional solid particle erosion *** materials achieved the same excellent solid particle erosion resistance performance through diversified *** resistance arises from their micro/nanoscale surface structure and interface material properties,which provide inspiration for novel multiple solutions to solid particle ***,this review first summarizes the recent significant process in the research of natural anti-solid particle erosion materials and their general design *** to these principles,several erosion-resistant structures are *** with advanced micro/nanomanufacturing technologies,several artificial anti-solid particle erosion materials have been ***,the potential applications of anti-solid particle erosion materials are ***,the remaining challenges and promising breakthroughs regarding anti-solid particle erosion materials are briefly discussed.

关键词： Bio-inspired materials Solid particle erosion Surface structures Micro/nanomanufacturing technologies Applications

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A Review of Intelligent Configuration and Its Security for Complex Networks

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Chinese Journal of Electronics 2024年第4期33卷 920-947页

作者： Yue ZHAO bin YANG Fei TENG Xianhua niu Ning HU Bo TIAN Science and Technology on Communication Security Laboratory School of Computer and Information Engineering Chuzhou University School of Computing and Artificial Intelligence Southwest Jiaotong University School of Computer and Software Engineering Xihua University Cyberspace Institute of Advanced Technology Guangzhou University

Complex networks are becoming more complex because of the use of many components with diverse technologies. In fact, manual configuration that makes each component interoperable has breed latent danger to system security. There is still no comprehensive review of these studies and prospects for further research. According to the complexity of component configuration and difficulty of security assurance in typical complex networks, this paper systematically reviews the abstract models and formal analysis methods required for intelligent configuration of complex networks, specifically analyzes, and compares the current key technologies such as configuration semantic awareness, automatic generation of security configuration, dynamic deployment, and verification evaluation. These technologies can effectively improve the security of complex networks intelligent configuration and reduce the complexity of operation and maintenance. This paper also summarizes the mainstream construction methods of complex networks configuration and its security test environment and detection index system, which lays a theoretical foundation for the formation of the comprehensive effectiveness verification capability of configuration security. The whole lifecycle management system of configuration security process proposed in this paper provides an important technical reference for reducing the complexity of network operation and maintenance and improving network security.

关键词： Complex networks Intelligent configuration Configuration security Software defined network Lifecycle management

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Calculating standard captured γ spectra of formation elements

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Petroleum Science 2012年第4期9卷 463-468页

作者： Wu Wensheng xiao Lizhi Zhang Lijuan niu Wei State Key Laboratory of Petroleum Resource and Prospecting China University of PetroleumBeijing 102249China

Multi-element gamma-ray spectrum logging requires standard spectra of individual elements for its *** the standard element spectra are usually derived using Monte Carlo simulation of either a pure element or its oxide,we synthesized the standard neutron captured γ spectra（as would be observed using a NaI（Tl） detector） of elements H,Si,Ca and Fe from each element and its *** compare the standard spectra from the elements and oxides,we operated three simulations of sandstone,limestone and mixed formation of sandstone and limestone each with ten different porosities,and used the two kinds of standard spectra to analyze the mixed spectra modeled from sandstone and limestone *** results show that the standard element spectra from oxides have more prominent energy peaks than the standard spectra from pure *** calculated formation element contents are close to the theoretical values when the standard element spectra from oxides are used to analyze the formation mixed ***,the formation element standard spectra should be calculated from oxide models in the analysis of neutron captured γ spectra by logging tools.

关键词： Standard spectrum spectrum analysis neutron captured γ spectrum formation element

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Strong Commutativity-preserving Generalized Derivations on Semiprime Rings

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Acta Mathematica Sinica,English Series 2008年第11期24卷 1835-1842页

作者： Jing MA xiao Wei XU Feng Wen niu Institute of Mathematics Jilin University Changchun 130012 P. R. China Department of Mathematics Shandong University Jinan 250100 P. R. China

Let R be a ring with a subset S. A mapping of R into itself is called strong commutativitypreserving （scp） on S, if [f（x）, f（y）] = [x, y] for all x, y ∈ S. The main purpose of this paper is to describe the structure of the generalized derivations which are scp on some ideals and right ideals of a prime ring, respectively. The semiprime case is also considered.

关键词： (semi-)prime ring generalized derivation GPI strong commutativity-preserving

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Effect of net carriers at the interconnection layer in tandem organic solar cells

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Chinese Physics B 2022年第3期31卷 631-635页

作者： Li-Jia Chen Guo-Xi niu Lian-bin niu Qun-Liang Song College of Physics and Electronic Engineering Chongqing Normal UniversityChongqing 401331China Institute for Clean Energy&Advanced Materials School of Materials and EnergySouthwest UniversityChongqing 400715China

Tandem cell with structure of indium tin oxide(ITO)/molybdenum oxide(MoO_(3))/fullerene(C60)/copper phthalocyanine(CuPc)/C60/tris-8-hydroxy-quinolinato aluminum(Alq_(3))/Al was fabricated to study the effect of net carriers at the interconnection layer. The open circuit voltage and short circuit current were found to be 1.15 V and 0.56 mA/cm^(2),respectively. Almost the same performance(1.05 V, 0.58 mA/cm^(2)) of tandem cell with additional recombination layer(ITO/MoO_(3)/C60/Alq_(3)/Al/Ag/MoO_(3)/CuPc/C60/Alq_(3)/Al) demonstrates that the carrier balance is more crucial than carrier recombination. The net holes at the interconnection layer caused by more carrier generation from the back cell on one hand would enhance the recombination with electrons from the front cell and on the other hand would quench the excitons produced in CuPc of the back cell.

关键词： tandem organic solar cells interconnection layer carrier balance carrier-exciton interaction

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Lmlntegrinβ-PS is required for wing morphogenesis and development in Locusta migratoria

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Insect Science 2021年第3期28卷 705-717页

作者： xiao-Ming Zhao niu niu Jia-Peng Yang Wei-Min Liu Jian-Zhen Zhang Institute of Applied Biology Shanxi UniversityTaiyuanChina College of Life Science Shanxi UniversityTaiyuanChina

Wings are an important flight organ of insects and their morphogenesis depends on a series of cell-to-cell and cell-to-extracellular matrix *** as a transmembrane protein receptor mediates cell-to-cell adhesion,cell-to-extracellular matrix interactions and signal *** the present study,we characterized an integrin gene that encodes integrinβ-PS protein in Locusta ***β-PS is highly expressed in the wing pads and the middle stages of 5th instar ***-chemical analysis revealed that the Lmlntegrinβ-PS protein was localized at the cell base of the two layers of *** suppression of Lmlntegrinβ-PS by RNA interference,the wing pads or wings were unable to form normally,with a blister wing appearance during nymph to nymph transition and nymph to adult *** further found that the dorsal and ventral epidermis of the wings after dsLmlntegrinβ-PS injection were improperly connected and formed huge cavities revealed by hematoxylin and eosin ***,the morphology and structure of the wing cuticle was significantly disturbed which affected the stable arrangement and attachments of the wing ***,the expression of related cell adhesion genes was significantly decreased in LmIntegrinβ-PS-suppressed ***,suggesting that Lmlntegrinβ-PS is required for the morphogenesis and development of wings during molting by stabilizing cell adhesion and maintaining the cytoskeleton of these cells.

关键词： cell adhesion integrin Locusta migratoria RNAi wing development

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