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Detecting coherence with respect to general quantum measurements

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Science China(Information Sciences) 2023年第8期66卷 52-60页

作者： Yu-Cheng CHEN Jiong CHENG wen-Zhao zhang Cheng-jie zhang School of Physical Science and Technology Ningbo University State Key Laboratory of Precision Spectroscopy School of Physics and Electronic Science East China Normal University

Quantum coherence is crucial in quantum resource theory. Previous studies have mainly focused on standard coherence based on a complete orthogonal reference. Standard coherence has recently been extended to general positive-operator-valued measure(POVM)-based coherence, including block coherence as a special case. Therefore, it is necessary to construct block and POVM-based coherence witnesses to detect them. In this study, we present witnesses for block and POVM-based coherence and obtain the necessary and sufficient conditions for constructing these witnesses. We also discuss possible realizations of some block and POVM-based coherence witnesses in experiments and present examples of measuring block coherence witnesses based on real experimental data. Furthermore, we present an application of block coherence witnesses in a quantum-parameter estimation task with a degenerate Hamiltonian and estimate the unknown parameter by measuring the block coherence witnesses when the input state is block ***, we prove that the quantum Fisher information of any block-incoherent state equals zero, which coincides with the result obtained from measuring block coherence witnesses.

关键词： coherence witness general quantum measurements block coherence POVM-based coherence quantum coherence

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Two-step Optimal Allocation of Stationary and Mobile Energy Storage Systems in Resilient Distribution Networks

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Journal of Modern Power Systems and Clean Energy 2021年第4期9卷 788-799页

作者： Xinyi Jiang Jian Chen Qiuwei Wu wen zhang Yicheng zhang jie Liu Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong UniversityJinan 250061China Center for Electric Power and Energy(CEE) Department of Electrical EngineeringTechnical University of Denmark(DTU)2800 Kongens LyngbyDenmark Institute for Infocomm Research(I2R) Agency for ScienceTechnology and Research(A*STAR)Singapore State Grid Yantai Power Supply Company YantaiChina

Energy storage systems (ESSs) are acknowledged to be a promising option to cope with issues in high penetration of renewable energy and guarantee a highly reliable power supply. In this paper, a two-step optimal allocation model is proposed to obtain the optimal allocation (location and size) of stationary ESSs (SESSs) and mobile ESSs (MESSs) in the resilient distribution networks (DNs). In the first step, a mixed-integer linear programming (MILP) problem is formulated to obtain the preselected location of ESSs with consideration of different scenarios under normal operation conditions. In the second step, a two-stage robust optimization model is established to get the optimal allocation results of ESSs under failure operation conditions which are solved by column-and-constraint generation (C&CG) algorithm. A hybrid ESS allocation strategy based on the subjective and objective weight analysis is proposed to give the final allocation scheme of SESSs and MESSs. Finally, the proposed two-step optimal allocation model is demonstrated on a modified IEEE 33-bus system to show its effectiveness and merits.

关键词： Resilient distribution network stationary energy storage system mobile energy storage system optimal allocation

Based on non-targeted metabolomics for differential components screening of Rosae Chinensis Flos and Rosae Rugosae Flos and their quality evaluation

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Traditional Medicine Research 2025年第2期10卷 1-15页

作者： Xu Liang Ni-Hui zhang Zhi-Lai Zhan Guang-Lu Chang Yan Gao Xia Li wen-Yuan Gao School of Pharmaceutical Science and Technology Faculty of MedicineTianjin UniversityTianjin 300193China State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs China Academy of Chinese Medical SciencesBeijing 100700China Key Laboratory of Modern Chinese Medicine Resources Research Enterprises Tianjin 300402China

Background:Rosa chinensis *** Rosa rugosa *** not only of ornamental value,but also edible flowers and the flower buds have been listed in the Chinese Pharmacopoeia as traditional *** two plants have some differences in efficacy,but the flower buds are easily confused for similar *** addition,large-scale cultivation of ornamental rose flowers may lead to a decrease in the effective components of medicinal ***,it is necessary to study the chemical composition and make quality evaluation of Rosae Chinensis Flos(Yueji)and Rosae Rugosae Flos(Meigui).Methods:In this study,40 batches of samples including Meigui and Yueji from different regions in China were collected to establish high-performance liquid chromatography ***,the fingerprints data was analyzed using principal component analysis,hierarchical cluster analysis,and partial least squares discriminant analysis analysis chemometrics to obtain information on intergroup differences,and non-targeted metabolomic techniques were applied to identify and compare chemical compositions of samples which were chosen from groups with large *** compounds were screened by orthogonal partial least-squares discriminant analysis and S-plot,and finally multi-component quantification was performed to comprehensively evaluate the quality of Yueji and ***:The similarity between the fingerprints of 40 batches roses and the reference print R was 0.73 to 0.93,indicating that there were similarities and differences between the *** principal component analysis and hierarchical cluster analysis of fingerprints data,the samples from different origins and varieties were intuitively divided into four *** least-squares discriminant analysis analysis showed that Meigui and Yueji cluster into two categories and the model was reliable.A total of 89 compounds were identified by high resolution mass spectrometry,mainly were flavonoids and flavon

关键词： Rosa chinensis Jacq. Rosa rugosa Thunb. metabolomics chemometrics multiple component quantification quality evaluation

Rapid report of source parameters of 2023 M6.2 Jishishan,Gansu earthquake sequence

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Earth and Planetary Physics 2024年第2期8卷 436-443页

作者： ZhiGao Yang jie Liu YingYing zhang wen Yang XueMei zhang China Earthquake Networks Center Beijing 100045China

The M6.2 earthquake in Jishishan,Gansu Province,on December 18,2023,caused extraordinary earthquake *** was located in the northern part of the north−south seismic zone,which is a key area for earthquake monitoring in *** newly built dense strong motion stations in this area provide unprecedented conditions for high-precision earthquake relocation,especially the earthquake focal *** paper uses the newly built strong motion and traditional broadband seismic networks to relocate the source locations of the M3.0 and above aftershocks and to invert their focal *** horizontal error of earthquake location is estimated to be 0.5−1 km,and the vertical error is 1−2 *** focal depth range of aftershocks is 9.6−14.6 km,distributed in a 12-km-long strip with SSE *** in the south are more concentrated horizontally and vertically,while aftershocks in the north are more *** focal mechanisms of the main shock and aftershocks are relatively consistent,and the P-axis orientation is consistent with the regional strain *** is a seismic blank area of M3.0 and above,about 3−5 km between the main shock and *** is suggested that the energy released by the main shock rupture is concentrated in this *** on the earthquake location and focal mechanism of the main shock,it is inferred that the Northern Lajishan fault zone is the seismogenic structure of the main shock,and the main shock did not occur on the main fault,but on a secondary *** initial rupture depth and centroid depth of the main shock were 12.8 and 14.0 km,*** source rupture depth may not be the main reason for the severe earthquake disaster.

关键词： Jishishan earthquake earthquake relocation focal mechanism strong motion data

Effect of the lenticles on moisture migration in capillary zone of tailings dam

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International Journal of Minerals,Metallurgy and Materials 2020年第8期27卷 1036-1045页

作者： Di Liu Min-jie Lian Cai-wu Lu wen zhang College of Materials Science and Engineering Xi’an University of Architecture and TechnologyXi’an 710055China Institute of Mining System Engineering Xi’an University of Architecture and TechnologyXi’an 710055China Sinosteel Mining Co. Ltd.Beijing 100080China School of Resource Engineering Xi’an University of Architecture and TechnologyXi’an 710055China

Small-particle interlayers(lenticles)show some characteristic hydraulic properties and can affect the movement of unsaturated *** this study,we developed a novel online capillary-water-absorption monitoring device and conducted three groups of comparison tests to simulate lenticle positions and thicknesses with respect to the capillary *** results show that the characteristic wetting front exhibits a fast rise in the early stage,a slow rise in the middle stage,and stability in the later *** motion of the capillary water in the lenticle is mainly transversal,with the upward curve being"flat,"and the longer is"flat,"the longer is the time needed for the water to *** interlayer can form a capillary stagnation zone with moisture content close to *** high interlayer may form a discontinuous corrugated capillary ***,when the wetting front reaches the"coarse-grain(lower)-fine-grain(upper)"interface,the"anti-capillary barrier effect"results in more moisture in the upper ***,when the wetting front of the capillary water reaches the"fine-grain(upper)-coarse-grain(lower)"interface,the"capillary barrier effect"causes the moisture content of the upper tailings to decreases sharply because of the horizontal movement of the water in the fine *** is clear that the presence of lenticles can retard the rise of capillary water by storing water.

关键词： tailings lenticle moisture migration capillary retarding effect microcosmic mechanism

Effects of salinity on the soil microbial community and soil fertility

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Journal of Integrative Agriculture 2019年第6期18卷 1360-1368页

作者： zhang wen-wen WANG Chong XUE Rui WANG Li-jie College of Resources and Environmental Sciences China Agricultural UniversityBeijing 100193P.R.China Beijing Key Laboratory of Biodiversity and Organic Farming China Agricultural UniversityBeijing 100193P.R.China Key Laboratory of Plant-Soil Interactions Ministry of EducationBeijing 100193P.R.China

Saline area is an important reserve resource of arable land,however,the effects of soil microorganisms on the soil fertility in saline coastal ecosystems remain poorly *** salinity effects on soil microorganisms,nutrient availabilities and their relationships were studied in soils along a salinity gradient.A total of 80 soil samples were collected from 16 sites at four salinity levels(non-saline soil,salt content4 g kg^1).The results showed that the salinity increased soil pH and exchangeable Na percent,but decreased soil organic matter,soil exchangeable K,and soil microbial *** the abundance and community composition of soil bacteria and fungi were significantly different between the non-saline and the saline *** predominant genera of soil bacteria(Planctomyces and Archangium,positive for carbon fixation)and fungi(Hydropisphaera,efficient in lignin degradation)changed with the increasing soil salinity and the decreasing soil organic *** summary,soil salinity changed the abundances of soil bacterial,fungal,and arbuscular mycorrhizal communities and,subsequently,affected their function in saline coastal ecosystems.

关键词： soil salt content soil organic matter T-RFLP soil health

PAS烧结SiC-石墨复相陶瓷的阻力曲线行为和抗热震性能

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固体火箭技术 2016年第5期39卷 692-696,702页

作者：杨万利康文杰张永辉谢小娟代丽娜肖志超江风益西安航天复合材料研究所超码科技有限公司西安710025 西安交通大学材料科学与工程学院西安710049 南昌大学材料科学与工程学院南昌330029

采用PAS烧结工艺,在1 680℃成功制备出Si C-石墨复相陶瓷,并研究了石墨含量对复相陶瓷物理力学性能、韧性、R曲线(阻力曲线)行为和抗热震性能的影响。结果表明,随石墨含量的增加,复相陶瓷的致密度、抗弯强度、弹性模量和维氏硬度均有所... 详细信息

采用PAS烧结工艺,在1 680℃成功制备出Si C-石墨复相陶瓷,并研究了石墨含量对复相陶瓷物理力学性能、韧性、R曲线(阻力曲线)行为和抗热震性能的影响。结果表明,随石墨含量的增加,复相陶瓷的致密度、抗弯强度、弹性模量和维氏硬度均有所降低;以韧化比(TI)作为复相陶瓷的韧性指标,表明石墨含量越多,复相陶瓷的韧性越好,存在陡峭的上升R曲线行为,该指标更能反映复相陶瓷的韧性特征;显微形貌分析发现,复相陶瓷中存在的层状石墨增加了能量耗损,裂纹在扩展过程中发生偏转、分叉和桥联等现象,使得Si C复相陶瓷的韧性和抗热震性能得以改善。

关键词： SiC-石墨复相陶瓷韧性 R曲线热震抗力

Direct transformation of dinitrogen: synthesis of N-containing organic compounds via N-C bond formation

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National Science Review 2020年第10期7卷 1564-1583页

作者： Ze-jie Lv Junnian Wei wen-Xiong zhang Ping Chen Dehui Deng zhang-jie Shi Zhenfeng Xi Beijing National Laboratory for Molecular Sciences (BNLMS) Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of ChemistryPeking University Dalian Institute of Chemical Physics Chinese Academy of Sciences Department of Chemistry Fudan University

N-containing organic compounds are of vital importance to lives. Practical synthesis of valuable N-containing organic compounds directly from dinitrogen(N2), not through ammonia(NH3), is a holy-grail in chemistry and chemical industry. An essential step for this transformation is the functionalization of the activated N2units/ligands to generate N-C bonds. Pioneering works of transition metal-mediated direct conversion of N2into organic compounds via N-C bond formation at metal-dinitrogen [N2-M] complexes have generated diversified coordination modes and laid the foundation of understanding for the N-C bond formation mechanism. This review summarizes those major achievements and is organized by the coordination modes of the [N2-M] complexes(end-on,side-on, end-on-side-on, etc.) that are involved in the N-C bond formation steps, and each part is arranged in terms of reaction types(N-alkylation, N-acylation, cycloaddition, insertion, etc.) between [N2-M]complexes and carbon-based substrates. Additionally, earlier works on one-pot synthesis of organic compounds from N2via ill-defined intermediates are also briefed. Although almost all of the syntheses of N-containing organic compounds via direct transformation of N2so far in the literature are realized in homogeneous stoichiometric thermochemical reaction systems and are discussed here in detail, the sporadically reported syntheses involving photochemical, electrochemical, heterogeneous thermo-catalytic reactions, if any, are also mentioned. This review aims to provide readers with an in-depth understanding of the state-of-the-art and perspectives of future research particularly in direct catalytic and efficient conversion of N2into N-containing organic compounds under mild conditions, and to stimulate more research efforts to tackle this long-standing and grand scientific challenge.

关键词： dinitrogen transformation metal-dinitrogen complex N−C bond formation N-containing organic compounds

Targeting mTOR network in colorectal cancer therapy

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World Journal of Gastroenterology 2014年第15期20卷 4178-4188页

作者： Xiao-wen Wang Yan-jie zhang Rutgers Cancer Institute of New Jersey 195 Little Albany StreetNew BrunswickNJ 08903United States Department of Gastroenterology No. 3 People’s Hospital Affiliated to Shanghai Jiaotong UniversitySchool of Medicine

The mechanistic target of rapamycin(mTOR)integrates growth factor signals with cellular nutrient and energy levels and coordinates cell growth,proliferation and survival.A regulatory network with multiple feedback loops has evolved to ensure the exquisite regulation of cell growth and *** cancer is the most intensively studied cancer because of its high incidence and mortality *** genetic alterations are involved in colorectal carcinogenesis,including oncogenic Ras activation,phosphatidylinositol 3-kinase pathway hyperactivation,p 53 mutation,and dysregulation of wnt *** oncogenic pathways activate the mTOR *** has emerged as an effective target for colorectal cancer *** vitro and preclinical studies targeting the mTOR pathway for colorectal cancer chemotherapy have provided promising ***,the overall objective response rates in major solid tumors achieved with single-agent rapalog therapy have been modest,especially in advanced metastatic colorectal *** regimens of mTOR inhibitor with agents such as cytotoxic chemotherapy,inhibitors of vascular endothelial growth factor,epidermal growth factor receptor and Mitogen-activated protein kinase kinase(MEK)inhibitors are being intensively studied and appear to be *** understanding of the molecular mechanism in mTOR signaling network is needed to develop optimized therapeutic *** this paper,oncogenic gene alterations in colorectal cancer,as well as their interaction with the mTOR pathway,are systematically *** most recent preclinical and clinical anticancer therapeutic endeavors are *** players in mTOR signaling pathway,such as nonsteroidal anti-inflammatory drug and metformin with therapeutic potentials are also discussed here.

关键词： Mechanistic target of rapamycin pathway Colorectal cancer Mechanistic target of rapamycin inhibitor Chemotherapy Drug resistance