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Recent progress on photoactive nonprecious transition-metal complexes

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.

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A characterization study on perovskite X-ray detector performance based on a digital radiography system

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Nuclear Science and Techniques 2023年第5期34卷 56-66页

作者： Yang Wang qiong zhang University of Electronic Science and Technology of China Chengdu 610000China

X-ray imaging technologies such as digital radiography(DR),is an important aspect of modern non-destructive testing and medical *** flexible X-ray detector technologies have recently been proposed and are now receiving increasing attention owing to their superior material flexibility compared with traditional flat-panel *** work aims to study these innovative flexible X-ray detectors in terms of their effectiveness in DR imaging,such as detection efficiency and spatial *** achieve this goal,first,a Monte Carlo model was developed and calibrated to an in-lab 150 kV DR imaging system containing a flat-panel X-ray ***,the validated model was updated with various types of flexible X-ray detectors to assess their performance in nearly realistic *** parameters such as the detection efficiency pertaining to the crystal material and thickness were studied and analyzed across a broader energy range up to 662 ***,the imaging performance of the different detectors was evaluated and compared to that of the flat-panel detector in the 150 kV DR imaging *** results show that the flexible detectors such as the CsPbBr3crystal detector deliver promising performance in X-ray imaging and can be applied to a wider range of application scenarios,especially those requiring accurate detection at challenging angles.

关键词： Flexible X-ray detector DR imaging system Monte Carlo simulation

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A fast forward computational method for nuclear measurement using volumetric detection constraints

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Nuclear Science and Techniques 2024年第2期35卷 47-63页

作者： qiong zhang Lin-Lv Lin University of Electronic Science and Technology of China Chengdu 610000China

Owing to the complex lithology of unconventional reservoirs,field interpreters usually need to provide a basis for interpretation using logging simulation *** the various detection tools that use nuclear sources,the detector response can reflect various types of information of the *** Monte Carlo method is one of the primary methods used to obtain nuclear detection responses in complex ***,this requires a computational process with extensive random sampling,consumes considerable resources,and does not provide real-time response ***,a novel fast forward computational method(FFCM)for nuclear measurement that uses volumetric detection constraints to rapidly calculate the detector response in various complex environments is ***,the data library required for the FFCM is built by collecting the detection volume,detector counts,and flux sensitivity functions through a Monte Carlo ***,based on perturbation theory and the Rytov approximation,a model for the detector response is derived using the flux sensitivity function method and a one-group diffusion *** environmental perturbation is constrained to optimize the model according to the tool structure and the impact of the formation and borehole within the effective detection ***,the method is applied to a neutron porosity tool for *** various complex simulation environments,the maximum relative error between the calculated porosity results of Monte Carlo and FFCM was 6.80%,with a rootmean-square error of 0.62 *** field well applications,the formation porosity model obtained using FFCM was in good agreement with the model obtained by interpreters,which demonstrates the validity and accuracy of the proposed method.

关键词： Nuclear measurement Fast forward computation Volumetric constraints

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INCREASED SPHERULITIC GROWTH RATES OF SEMICRYSTALLINE POLYMER DUE TO ENHANCED LIMITED LOCAL CHAIN SEGMENTAL MOBILITY AT THE INTERFACE OF DOUBLE-LAYER THIN FILMS

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Chinese Journal of Polymer Science 2013年第9期31卷 1276-1283页

作者： Ya-qiong zhang Zhi-gang Wang CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China

In this work the nucleation and growth of spherulites for the below polylactide （PLA） layer in poly（ε- caprolactone）/polylactide （PCL/PLA） double-layer films during isothermal crystallization at various temperatures above the melting point of PCL have been investigated by using polarized optical microscopy （POM）. It is revealed that two types of spherulitic morphologies are observed in PCL/PLA double-layer films. One is the well defined highly birefringent spherulites, and the other one is the coarse spherulites. It is interesting to find that the spherulitic growth rate of the coarse spherulites is higher than that of the well defined spherulites. It is thought that the coarse spherulites nucleate and grow with the assistance of the interfaces between the PCL and PLA layers, and the well defined highly birefringent spherulites only nucleate and grow in the PLA layer.

关键词： Polylactide Poly(ε-caprolactone) Interface Crystallization Spherulite.

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Source-less density measurement using an adaptive neutron-induced gamma correction method

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Nuclear Science and Techniques 2023年第8期34卷 115-130页

作者： qiong zhang Yi Ge Yu-Lian Li University of Electronic Science and Technology of China Chengdu 610000China

The use of radioactive isotopes,such as Cs-137,to measure formation density is a common practice;however,it poses high risks such as environmental contamination from lost *** address these challenges,the use of pulsed neutron sources for density measurements,also known as“source-less density”,has emerged as a promising *** collecting gamma counts at different time gates according to the duty cycle of the pulsed sequence,the inelastic gamma component can be isolated to obtain more accurate density ***,the collection of gamma rays during the neutron burst-on period often contains a proportion of capture gamma rays,which can reduce the accuracy of density *** proportion can vary depending on the formation environment and neutron duty *** address these challenges,an adaptive capture gamma correction method was developed for density *** method distinguishes between“burst-on”and“burst-off”periods based on the gamma time spectra,and derives the capture ratio in the burst-on period by iteratively fitting the capture gamma time spectra,resulting in a more accurate net inelastic *** method identifies the end of the pulse by automatically calculating the differential,and fits the capture gamma time spectra using Gaussian process regression,which considers the differences in formation attenuation caused by different *** method was verified through simulations with errors of below 0.025 g/cm3,demonstrating its adaptability and feasibility for use in formation density ***,the proposed method has the potential to minimize the risks associated with radioactive isotopes and improve the accuracy of density measurements in various duty cycles and formation environments.

关键词： Neutron-induced gamma Adaptive correction Source-less density

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Sludge fermentation liquid addition attained advanced nitrogen removal in low C/N ratio municipal wastewater through short-cut nitrification-denitrification and partial anammox

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Frontiers of Environmental Science & Engineering 2021年第2期15卷 107-116页

作者： Shengjie Qiu Jinjin Liu Liang zhang qiong zhang Yongzhen Peng National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology Engineering Research Center of BeijingBeijing University of TechnologyBeijing 100124China

Biological nitrogen removal of wastewater with low COD/N ratio could be enhanced by the addition of wasted sludge fermentation liquid(SFL),but the performance is usually limited by the introducing *** this study,the process of using SFL was successfully improved by involving anammox *** municipal wastewater with a low C/N ratio of 2.8–3.4 was treated in a sequencing batch reactor(SBR).The SBR was operated under anaerobic-aerobic-anoxic(AOA)mode and excess SFL was added into the anoxic *** short-cut nitrification was achieved after 46d and then anammox sludge was *** the stable period,effluent total inorganic nitrogen(TIN)was less than 4.3 mg/L with removal efficiency of 92.3%.Further analysis suggests that anammox bacteria,mainly affiliated with Candidatus_Kuenenia,successfully reduced the external ammonia from the SFL and contributed approximately 28%–43%to TIN ***,this study suggests anammox could be combined with SFL addition,resulting in a stable enhanced nitrogen biological removal.

关键词： Sludge fermentation liquid Municipal wastewater Advanced nitrogen removal Short-cut nitrification Partial anammox

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Origin of the spatial consistency of summer precipitation variability between the Mongolian Plateau and the mid-latitude East Asian summer monsoon region

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Science China Earth Sciences 2020年第8期63卷 1199-1208页

作者： Jie CHEN Wei HUANG qiong zhang Song FENG Key Laboratory of Western China s Environmental Systems(Ministry of Education) College of Earth and Environmental SciencesLanzhou UniversityLanzhou 730000China Department of Physical Geography and Bolin Centre for Climate Research Stockholm UniversityStockholm 10691Sweden Department of Geosciences University of ArkansasFayetteville 72701USA

The Mongolian Plateau(MP) is located in the eastern part of arid Central Asia(ACA). Climatically, much of the MP is dominated by the westerly circulation and has an arid and semi-arid climate;however, the eastern part of the MP is also influenced by the East Asian summer monsoon(EASM) and has a humid and semi-humid climate. Several studies have shown that precipitation variability in the MP differs from that in western ACA but is consistent with that in the EASM region. Here we use monthly precipitation data for 1979–2016 to characterize and determine the origin of the summer precipitation variability of the MP and the EASM region. The results show that the MP and the mid-latitude EASM region exhibit a consistent pattern of precipitation variability on interannual and decadal timescales;specifically, the consistent regions are the MP and North and Northeast China. We further investigated the physical mechanisms responsible for the consistent interdecadal precipitation variability between the MP and the mid-latitude EASM region, and found that the mid-latitude wave train over Eurasia, with positive(negative) geopotential height anomalies over the North Atlantic and ACA and negative(positive) geopotential height anomalies over Europe and the MP, is the key factor responsible for the consistency of precipitation variability in the MP and the mid-latitude EASM region. The positive anomalies over the North Atlantic and ACA and negative anomalies over Europe and the MP would enhance the transport of westerly and monsoon moisture to the MP and North and Northeast China. They could also strengthen the Northeast Asian low, enhance the EASM, and trigger the anomalous ascending motion over the MP which promotes precipitation in the MP and in the mid-latitude EASM region. Overall, our results help explain the spatial variations of paleo-precipitation/humidity reconstructions in East Asia and clarify the reasons for the consistency of the regional climate.

关键词： Mongolian Plateau Mid-latitude EASM region Summer precipitation Decadal Consistent variability

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内蒙古农牧交错区典型黑土坡耕地土壤侵蚀空间分布特征

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水土保持研究 2025年第1期32卷 13-20页

作者：邹惠杰刘刚舒成博孙波刘亚张琼郭珍中国科学院教育部水土保持与生态环境研究中心黄土高原土壤侵蚀与旱地农业国家重点实验室中国科学院水利部水土保持研究所中国科学院大学西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室四川华标测检测技术有限公司

[目的]定量了解内蒙古典型黑土区土壤侵蚀速率，探究该区域土壤侵蚀空间分布特征，阐明土壤侵蚀坡面和区域空间分布规律，以期为区域水土流失治理提供参考。[方法]采集内蒙古农牧交错区（海拉尔区、额尔古纳市和牙克石市）典型黑土坡耕... 详细信息

[目的]定量了解内蒙古典型黑土区土壤侵蚀速率，探究该区域土壤侵蚀空间分布特征，阐明土壤侵蚀坡面和区域空间分布规律，以期为区域水土流失治理提供参考。[方法]采集内蒙古农牧交错区（海拉尔区、额尔古纳市和牙克石市）典型黑土坡耕地的土壤样品，利用137Cs示踪技术计算各采样点土壤侵蚀速率，结合小波分析的方法研究土壤侵蚀在坡面的分布特征。[结果]（1） 3个坡面所有采样点137Cs含量均小于背景值（1 984.24 Bq/m2）,表现为所有坡面土壤流失。（2） 3个地区的采样坡面平均侵蚀速率表现为：海拉尔[6 533.37 t/（km2·a）]>额尔古纳[4 174.35 t/（km2·a）]>牙克石[2 765.87 t/（km2·a）]。相同坡面的3个纵向断面的平均侵蚀速率相近，同一断面侵蚀速率的变异程度较高。（3）土壤侵蚀速率沿坡长呈强弱交替的周期性变化，但周期长度并不固定。大部分纵向断面存在周期长度为80～160 m和160～200 m的大小两个周期。部分纵向断面只存在一个周期长度为100～120 m的周期。[结论]该地区土壤侵蚀在坡面尺度表现为全坡面侵蚀且在纵向呈现周期性特征，在区域尺度呈现从东到西逐渐增加趋势。

关键词：土壤侵蚀典型黑土农牧交错带小波分析

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Surgery and antibiotics for the treatment of lupus nephritis with cerebral abscesses:A case report

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World Journal of Clinical Cases 2022年第6期10卷 1981-1990页

作者： qiong-Dan Hu Li-Shang Liao Yong zhang qiong zhang Jian Liu Department of Nephrology The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical UniversityLuzhou 646000Sichuan ProvinceChina Department of Medical Technology Faculty of Associated Medical SciencesChiang Mai UniversityChiang Mai 50000Thailand Department of Neurosurgery The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical UniversityLuzhou 646000Sichuan ProvinceChina Department of Neurosurgery Suining First People's HospitalSuining 629000Sichuan ProvinceChina

BACKGROUND Systemic lupus erythematosus(SLE)patients are extremely susceptible to opportunistic infections due to glucocorticoid and immunosuppressive treatments,which often occur in the respiratory system,the urinary system and the ***,multiple cerebral infections are rarely reported and their treatment is not standardized,especially when induced by a rare *** SUMMARY A 46-year-old woman was treated with glucocorticoid and immunosuppressant for SLE involving the hematologic system and kidneys(class IV-G lupus nephritis)for more than one *** was admitted to hospital due to headache and fever,and was diagnosed with multiple cerebral *** enhanced magnetic resonance imaging showed multiple nodular abnormal signals in both frontal lobes,left parietal and temporal lobes,left masseteric space(left temporalis and masseter region).The initial surgical plan was only to remove the large abscesses in the left parietal lobe and right frontal *** surgery,based on the drug susceptibility test results(a rare pathogen Nocardia asteroides was found)and taking into consideration the patient’s renal dysfunction,a multi-antibiotic regimen was selected for the *** immunosuppressant mycophenolate mofetil was discontinued on admission and the dose of prednisone was reduced from 20 mg/d to 10 mg/***-examination at 3 mo post-surgery showed that the intracranial lesions were reduced,the edema around the lesions was absorbed and dissipated,and her neurological symptoms had *** patient had no headaches or other neurological symptoms and lupus nephritis was stable during the 2-year follow-up *** In this report,we provide reasonable indications for immunosuppression,anti-infective therapy and individualized surgery for an SLE patient complicated with multiple cerebral abscesses caused by a rare pathogen,which may help improve the diagnosis and treatment of similar cases.

关键词： Systemic lupus erythematosus Multiple cerebral abscesses Nocardia asteroides Multi-antibiotic therapy Case report

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A method for neutron-induced gamma spectra decomposition analysis based on Geant4 simulation

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Nuclear Science and Techniques 2022年第12期33卷 36-48页

作者： Wei Tang Jin-Gang Liang Yi Ge qiong zhang University of Electronic Science and Technology of China Chengdu 610000China Tsinghua University Beijing 10000China

In various monitoring and detection tools that use pulsed neutron generators as radiation sources,the gamma rays induced by the interaction with various nuclei at different stages of neutron transport can reflect information about the *** gamma rays are generated in two major interactions:inelastic scattering of fast neutrons and radiative capture of thermal neutrons,corresponding to the inelastic and capture gamma rays,***,the two types of gamma rays that reflect different properties of the medium are difficult to collect by normal detectors *** proportion of the two gamma rays needs to be solved for the separation of inelastic and capture ***,this study proposes an optimized spectra decomposition method to calculate the inelastic-to-capture ratio in the measured total gamma spectra based on the net inelastic and capture spectra obtained using the Geant4 *** the simulated data cannot reflect the energy resolution of the measured spectra,we introduce the Gaussian broadening function of the gamma detector while calculating the proportion of the spectra components,and achieve optimization of the proportion values and resolution parameters *** on the results,the total simulated spectra obtained by superimposing the broadened net inelastic and capture gamma spectra according to the calculated inelastic-to-capture ratio are in good agreement with their measured counterpart.

关键词： Neutron-induced gamma Geant4 Spectra analysis

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