检索结果-南通市图书馆

Recent progress on photoactive nonprecious transition-metal complexes

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期 46-95页

作者： Zhong-Liang Gong Hong-Jie Zhang Yan Cheng Jianxun Liu Yuhan Ai Yaqin Li Zhihui Feng Qiong Zhang Shaolong Gong Yong Chen chang-Jiang Yao Yuan-Yuan Zhu Liang-Jin xu Yu-Wu Zhong CAS Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences State Key Laboratory of Structural Cemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences School of Chemistry and Chemical Engineering Anhui Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of Technology State Key Laboratory of Explosion Science and Safety Protection School of Mechatronical Engineering Beijing Institute of Technology College of Chemistry and Molecular Sciences Hubei Key Lab on Organic and Polymeric Optoelectronic Materials Wuhan University School of Chemistry and Chemical Engineering Anhui University Key Laboratory of Photochemical Conversion and Optoelectronic Materials & CAS-HKU Joint Laboratory on New Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences

Photoactive complexes of nonprecious transition metals, mainly including those in the first-row and partially the second-row of the Periodic table of elements, have received increasing attention in view of their low cost and long-term sustainability. They are recognized as promising alternatives to noble transition metal complex congeners that have been extensively studied in optoelectronic devices, artificial photosynthesis, photocatalysis, biodiagnostics, and therapeutics, etc. This review is devoted to a comprehensive summary on the classical and recent advances on photoactive nonprecious transition metal complexes, including photoactive Zr, V, Cr, Mo, and W complexes, Mn complexes and hybrids, Fe, Co, Ni, and Cu complexes, and Zn and Cd complexes and hybrids. A particular focus is given on the molecular design, modulation of photophysical and photochemical properties, and applications of the representative and lately-developed nonprecious metal complexes. In addition, a perspective on the future development in this field is provided at the end of this review.

关键词：

同方期刊数据库

AGGREGATION AND DECISION MAKING USING INTUITIONISTIC MULTIPLICATIVE TRIANGULAR FUZZY INFORMATION

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science and Systems Engineering 2014年第1期23卷 20-38页

作者： shan YU Zeshui xu College of Sciences PLA University of Science and Technology Business School Sichuan University

The intuitionistic triangular fuzzy set is a generalization of the intuitionistic fuzzy set. In practical applications, we find that the results derived by using the traditional intuitionistic triangular fuzzy aggregation operators based on intuitionistic triangular fuzzy sets are sometimes inconsistent with intuition. To overcome this issue, based on the [1/9, 9] scale, we define the concepts of intuitionistic multiplicative triangular fuzzy set and intuitionistic multiplicative triangular fuzzy number, and then we discuss their operational laws and some desirable properties. Based on the operational laws, we develop a series of aggregation operators for intuitionistic multiplicative triangular fuzzy information, and then apply them to propose an approach to multi-attribute decision making under intuitionistic fuzzy environments. Finally, we use a practical example involving the evaluation of investment alternatives of an investment company to demonstrate our aggregation operators and decision making approach.

关键词： Intuitionistic multiplicative triangular fuzzy set intuitionistic multiplicative triangularfuzzy number aggregation operator multi-attribute decision making

Enrichment Patterns and New Discovery of Deep Lacustrine Shale Oil in the Upper Cretaceous Qingshankou Formation,Songliao Basin,NE China

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2021年第4期95卷 1426-1428页

作者： LIU Weibin xu Xingyou BAI Jing LIU chang CHEN shan LI Yaohua Oil and Gas Survey China Geological SurveyBeijing 100029China

Objective The Songliao Basin is located in northeastern *** Upper Cretaceous Qingshankou Formation(Fm.)(K2 qn),Yaojia Fm.(K2 y),and Nenjiang Fm.(K2 n)were deposited in its *** sediments are mainly continental clastic *** first member of the Qingshankou Fm.(K2 qn1)in the southern Songliao Basin mainly comprises semi-deep to deep lacustrine shale of large thickness,generally 30,100 m,with wide distribution;the thickness of the shale has an average thickness of 70 m.

关键词： China. Cretaceous shale

Greedy Lattice Paths with General Weights

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2024年第9期40卷 2213-2222页

作者： Yin shan chang An Qi ZHENG College of Mathematics Sichuan UniversityChengdu 610065P.R.China

Let{X_(v):v∈Z^(d)}be *** *** S(π)=Σ_(v∈π)X_(v)be the weight of a self-avoiding lattice pathπ.Let M_(n)=max{S(π):πhas length n and starts from the origin}.We are interested in the asymptotics of Mn as n→∞.This model is closely related to the first passage percolation when the weights{X_(v):v∈Z^(d)}are non-positive and it is closely related to the last passage percolation when the weights{X_(v):v∈Z^(d)}are *** general weights,this model could be viewed as an interpolation between first passage models and last passage ***,this model is also closely related to a variant of the position of right-most particles of branching random *** the two assumptions that∃α>0,E(X_(0)^(+))^(d)(log^(+)X_(0)^(+))^(d+α)0,E(X_(0)^(+))^(d)(log^(+)X_(0)^(+))^(d+α)<+∞and that E[(X_(0)^(−))^(4)]<+∞,we prove that M_(n)/n converges to the same constant M almost surely as n tends to infinity.

关键词： Last passage percolation first passage percolation greedy lattice path

Palladium Nanoparticles/Graphdiyne Oxide Nanocomposite with Excellent Peroxidase-like Activity and Its Application for Glutathione Detection

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2022年第2期38卷 529-534页

作者： LAN Weifei HU Ruifeng HUANG Danrong DONG xu SHEN Gangyi chang shan DAI Dongsheng School of Pharmacy Minzu University of ChinaBeijing 100081P.R.China Institute of Chemistry Chinese Academy of SciencesBeijing 100190P.R.China Institute of Bioinformatics and Medical Engineering School of Electrical and Information EngineeringJiangsu University of TechnologyChangzhou 213001P.R.China

In this study, palladium nanoparticles loaded graphdiyne oxide (Pd/GDYO) nanocomposite were fabricated by in-situ reduction of palladium chloride in the dispersion of GDYO, and characte-rized by Raman spectra, transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The synthesized Pd/GDYO was first found to have catalytic activities similar to those of the peroxidase enzyme, which can catalyze the oxidation of peroxidase substrate 3,3',5,5'-tetramethylbenzidine(TMB) in the presence of hydrogen peroxide(H2O2). Steady-state kinetic studies showed that the catalytic reaction of Pd/GDYO follows a ping-pong mechanism, and Pd/GDYO has a stronger activity to TMB with a Michaelis constant(Km) value of 5.32×10-4 mmol/L. Based on the shielding effect of glutathione(GSH) on the Pd/GDYO-H2O2-TMB reaction system, a colorimetric detection method for GSH was deve-loped with a wide linear range from 0.1 μmol/L to 40 μmol/L and a limit of detection of 0.1 μmol/L. The method was successfully applied for fast and accurate detection of GSH in injection powder drugs. It was expected that this peroxidase-like Pd/GDYO nano- composite would have wide applications in the fields of biomedicine and environmental chemistry.

关键词： Palladium nanoparticle/graphdiyne oxide nanocomposite Peroxidase-like activity Colorimetric detection Glutathione

Sensor scheduling for ground maneuvering target tracking in presence of detection blind zone

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2020年第4期31卷 692-702页

作者： xu Gongguo shan Ganlin DUAN Xiusheng Department of Electronic and Optical Engineering Shijiazhuang Campus of Army Engineering UniversityShijiazhuang 050003China School of Mechanical Engineering Shijiazhuang Tiedao UniversityShijiazhuang 050013China

Continuous and stable tracking of the ground maneuvering target is a challenging problem due to the complex terrain and high clutter. A collaborative tracking method of the multisensor network is presented for the ground maneuvering target in the presence of the detection blind zone(DBZ). First, the sensor scheduling process is modeled within the partially observable Markov decision process(POMDP) framework. To evaluate the target tracking accuracy of the sensor, the Fisher information is applied to constructing the reward function. The key of the proposed scheduling method is forecasting and early decisionmaking. Thus, an approximate method based on unscented sampling is presented to estimate the target state and the multi-step scheduling reward over the prediction time horizon. Moreover, the problem is converted into a nonlinear optimization problem, and a fast search algorithm is given to solve the sensor scheduling scheme quickly. Simulation results demonstrate the proposed nonmyopic scheduling method(Non-MSM) has a better target tracking accuracy compared with traditional methods.

关键词： sensor scheduling ground maneuvering target detection blind zone(DBZ) decision tree optimization

Spectral Synthesis via Mean Field approach to Independent Component Analysis

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2016年第3期16卷 51-62页

作者： Ning Hu shan-shan Su xu Kong CAS Key Laboratory for Research in Galaxies and Cosmology Department of Astronomy University of Science and Technology of China

We apply a new statistical analysis technique, the Mean Field approach to Independent Component Analysis（MF-ICA） in a Bayseian framework, to galaxy spectral analysis. This algorithm can compress a stellar spectral library into a few Independent Components（ICs）, and the galaxy spectrum can be reconstructed by these ICs. Compared to other algorithms which decompose a galaxy spectrum into a combination of several simple stellar populations, the MF-ICA approach offers a large improvement in efficiency. To check the reliability of this spectral analysis method, three different methods are used：（1） parameter recovery for simulated galaxies,（2） comparison with parameters estimated by other methods, and（3） consistency test of parameters derived with galaxies from the Sloan Digital Sky Survey. We find that our MF-ICA method can not only fit the observed galaxy spectra efficiently, but can also accurately recover the physical parameters of galaxies. We also apply our spectral analysis method to the DEEP2 spectroscopic data, and find it can provide excellent fitting results for low signal-to-noise spectra.

关键词： methods: data analysis -- methods: statistical -- galaxies: evolution -- galaxies: fundamentalparameters -- galaxies: stellar content

复合式小梁切除术治疗闭角型青光眼的临床观察

在线全文

学校读者我要写书评

暂无评论

眼外伤职业眼病杂志 2010年第11期32卷 846-847页

作者：徐常山郁建平洪流梅小飞徐凯姜堰市人民医院眼科江苏姜堰225500

目的评价复合式小梁切除术治疗原发性闭角型青光眼的临床效果。方法对56例(56眼)原发性闭角型青光眼行复合式小梁切除术,术中在巩膜瓣下放置浸有0.2mg/mL丝裂霉素的棉片3～5min,缝合巩膜瓣时作两根可拆除缝线。术后观察眼压、前房、滤... 详细信息

目的评价复合式小梁切除术治疗原发性闭角型青光眼的临床效果。方法对56例(56眼)原发性闭角型青光眼行复合式小梁切除术,术中在巩膜瓣下放置浸有0.2mg/mL丝裂霉素的棉片3～5min,缝合巩膜瓣时作两根可拆除缝线。术后观察眼压、前房、滤过泡、视力及并发症发生情况,术后进行随访4～27月。结果术后前房形成、眼压控制均取得满意的效果。结论复合式小梁切除术治疗原发性闭角型青光眼能很好的控制眼压、能形成长期有效的滤过道,并发症发生率低。

关键词：复合式小梁切除术原发性闭角型青光眼可拆除缝线:丝裂霉素

A review of the microseismic focal mechanism research

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2021年第3期64卷 351-363页

作者： Han LI xu chang Key Laboratory of Petroleum Resource Research Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing 100029China

Reservoir reconstructions implemented in unconventional oil and gas exploration usually adopt hydraulic fracturing techniques to inject high-pressure fluid into the reservoir and change its pore-fracture connection structure to enhance *** fracturing changes the reservoir stress and causes the rocks to crack,thus generating microseismic *** important component of microseismic research is the source mechanism *** the research on the microseismic focal mechanism,information on the source mechanisms and in-situ stress status variations can be quantitatively revealed to effectively optimize the reservoir reconstruction design for increasing *** paper reviews the recent progress in hydraulic fracturing induced microseismic focal mechanism *** summarize their main principles and provide a detailed introduction of the research advances in source modeling,microseismic data synthesis,and focal mechanism *** also discuss the challenges and limitations in the current microseismic focal mechanism research and propose prospects for future research ideas and directions.

关键词： Unconventional oil and gas Microseismic monitoring Microseismic events Focal mechanism research