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Reducing the voltage loss of Y-series acceptor based organic solar cells via ternary/quaternary strategies

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Chinese Chemical Letters 2024年第2期35卷 70-86页

作者： Pengyu Zhang Zhiyang Zhang Heng Sun Jie Li yi Chen Jiang Wang Chuanlang Zhan Key Laboratory of Advanced Materials Chemistry and Devices (AMC&DLab) of the Department of Education of Inner Mongolia Autonomous Region Inner Mongolia Key Laboratory of Green CatalysisCollege of Chemistry and Environment ScienceInner Mongolia Normal UniversityHuhehot 010022China

In recent years, with the emergence of non-fullerene fused-ring acceptors, power conversion efficiencies (PCEs) of organic solar cells (OSCs) have exceeded 19%.However, compared to inorganic or perovskite photovoltaic cells, a higher voltage loss has become one of the key factors limiting further improvement in the PCEs of *** ternary/quaternary strategy has been identified as a feasible and effective way to obtain high-efficiency *** this review, a brief outline is given of the key roles that guest materials played in reducing voltage losses in solar cell devices and a brief look at the future material design and the design of ternary/quaternary systems.

关键词： Organic solar cell Ternary/quaternary strategy Open-circuit voltage Voltage loss Non-radiative recombination loss

Construction of ZnO@CDs@Co_(3)O_(4) sandwich heterostructure with multi-interfacial electron-transfer toward enhanced photocatalytic CO_(2) reduction

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Chinese Chemical Letters 2024年第4期35卷 147-152页

作者： Xiuzheng Deng yi Ke Jiawen Ding yingtang Zhou Hui Huang Qian Liang Zhenhui Kang Advanced Catalysis and Green Manufacturing Collaborative Innovation Center CNPC-CZU Innovation AllianceSchool of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control National Engineering Research Center for Marine AquacultureMarine Science and Technology CollegeZhejiang Ocean UniversityZhoushan 316004China

Photocatalytic conversion of CO_(2) into small-molecule chemical feedstocks can meet the growing demand for energy and alleviate the global warming. Herein, a p-n ZnO@CDs@Co_(3)O_(4) heterojunction with sandwich structure was constructed by calcination method of self-assembled ZIF-8@CDs@ZIF-67. The ZnO@CDs@Co_(3)O_(4) with well-defined interfacial structure exhibited the significantly enhanced photocatalytic CO_(2) reduction activity, and the optimal catalyst indicated the(CO + CH_(4)) evolution rate of 214.53μmol g^(-1)h^(-1) under simulated solar light, which was superior to ZnO, Co_(3)O_(4) and binary ZnO@Co_(3)O_(4).The internal cavity, exposed active sites, multiple interfaces and constructed p-n heterojunction can facilitate the light harvesting and photoexcited electron transfer. Besides, after introduction of CDs placed in the middle layer between ZnO and Co_(3)O_(4), CDs with excellent photoelectric property further promoted charge separation and migration. This work represents an appealing strategy to construct well-defined photocatalysts for boosting CO_(2) photoreduction.

关键词： Metal-organic framework Photocatalytic CO_(2) reduction Carbon dots p-n heterojunction Sandwich heterostructure

Low-molecular-weight heparin and preeclampsia—does the sword cut both ways?Three case reports and review of literature

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World Journal of Clinical Cases 2024年第9期12卷 1634-1643页

作者： Dan Shan Tao Li Xi Tan Ya-yi Hu Department of Obstetrics and Gynecology West China Second University HospitalSichuan UniversityChengdu 610000Sichuan ProvinceChina Key Laboratory of Birth Defects and Related Diseases of Women and Children Sichuan UniversityMinistry of EducationChengdu 610000SichuanChina

BACKGROUND Low-molecular-weight heparins(LMWH)are the most commonly used anticoagulants during *** is considered to be the drug of choice due to its safety in not crossing *** the beneficial effect in the improvement of microcirculation,prophylactic application of LMWH in patients with preeclampsia became a ***,the bleeding risk related with LMWH in preeclampsia patients has seldomly been *** current study aimed to identify the potential risks regarding LMWH application in patients with *** SUMMARY Herein we present a case series of three pregnant women diagnosed with preeclampsia on LMWH therapy during *** the cases experienced catastrophic hemorrhagic *** reviewing the twenty-one meta-analyses,the bleeding risk related with LMWH seems *** one study analyzed the bleeding risk of LMWH and found a significantly higher risk of developing PPH in women receiving *** studies reported minor bleeding risks,none of these were serious enough to stop LMWH *** of bleeding either from uterus or from intrabdominal organs in preeclampsia patients on LMWH therapy should not be *** management of blood pressure even after delivery and homeostasis suture in surgery are *** Consideration should be given to the balance between benefits and risks of LMWH in patients with preeclampsia.

关键词： Pregnancy Preeclampsia Low-molecular-weight heparin Hemorrhage Case report

Design and preparation of highly crystalline K-intercalated W@PCN:an efficient material for aniline elimination

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Rare Metals 2024年第3期43卷 1337-1342页

作者： Hao-Fei Li Kai-Wen Yu Xiao-Bi Jing Lei Duan yi-Yang Zhang School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou225002China School of Mechanical Engineering Yangzhou UniversityYangzhou225127China School of Material Science and Engineering Huazhong University of Science and TechnologyWuhan430071China School of Chemical Engineering and Materials Changzhou Institute of TechnologyChangzhou213032China Department of Basic Courses Army Engineering University of PLANanjing211101China

In this paper,we designed and prepared the polymeric carbon nitride-supported tungsten(W@PCN)*** were employed as the catalysts for photocatalytic oxidation of aniline in *** the process,H_(2)O_(2)was initially generated via the PCN-catalyzed *** by supported tungsten,aniline was oxidized by the in situ generated H_(2)O_(2)to obtain less toxicpoly aniline.

关键词： materials aniline crystalline

水利水电工程移民农户的收入分化效应--基于云龙水库移民建设的实证研究

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科学决策 2021年第9期 73-83页

作者：刘富华梁牧王毅铭云南财经大学经济学院

大规模公共工程建设产生大量搬迁移民农户,识别被动式移民农户并准确估算搬迁前后收入分化的福利影响效应,对评估工程建设可行性具有重要意义。以水利水电工程建设为例,根据212户原云龙水库区域农户搬迁前后收入情况的入户调查样本,采... 详细信息

大规模公共工程建设产生大量搬迁移民农户,识别被动式移民农户并准确估算搬迁前后收入分化的福利影响效应,对评估工程建设可行性具有重要意义。以水利水电工程建设为例,根据212户原云龙水库区域农户搬迁前后收入情况的入户调查样本,采用双重差分估计法分析不同个体特征和社区特征对移民农户收入分化的净影响效应。研究结果表明,水利水电工程建设改变了移民农户原有的生活方式,会对移民农户搬迁后的收入产生正向影响。此外,具有不同个体特征和社区特征的移民农户在搬迁后会产生收入分化效应。当户主的受教育程度越高,移民农户搬迁后的收入水平越高;当移民农户选择搬迁至工业化水平较高的地区,其搬迁后收入增加相对容易。据此,从鼓励居民外迁、加强技能培训、选择工业化水平高的迁移地三个方面提出政策建议。

关键词：水利水电工程建设移民农户收入分化效应双重差分法

Morphology and valence state evolution of Cu:Unraveling the impact on nitric oxide electroreduction

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Journal of Energy Chemistry 2024年第4期91卷 276-286页

作者： Ting Sun Fengyu Gao Ya Wang Honghong yi Qingjun Yu Shunzheng Zhao Xiaolong Tang School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China

Ammonia(NH3)serves as a critical component in the fertilizer industry and fume gas ***,the conventional NH3production process,namely the Haber-Bosch process,leads to considerable energy consumption and waste gas *** address this,electrocatalytic nitric oxide reduction reaction(NORR)has emerged as a promising strategy to bridge NH3consumption to NH3production,harnessing renewable electricity for a sustainable ***(Cu)stands out as a prominent electrocatalyst for NO reduction,given its exceptional NH3yield and ***,a crucial aspect that remains insufficiently explored is the effects of morphology and valence states of Cu on the NORR *** this investigation,we synthesized CuO nanowires(CuO-NF)and Cu nanocubes(Cu-NF)as cathodes through an in situ growth ***,CuO-NF exhibited an impressive NH3yield of 0.50±0.02 mg cm^(-2)h^(-1)at-0.6 V *** hydrogen electrode(RHE)with faradaic efficiency of29,68%±1,35%,surpassing that of Cu-NF(0.17±0.01 mg cm^(-2)h^(-1),16.18%±1.40%).Throughout the electroreduction process,secondary cubes were generated on the CuO-NF surface,preserving their nanosheet cluster morphology,sustained by an abundant supply of subsurface oxygen(s-O)even after an extended duration of 10 h,until s-O depletion ***,Cu-NF exhibited inadequate s-O content,leading to rapid crystal collapse within the same *** distinctive current-potential relationship,akin to a volcano-type curve,was attributed to distinct NO hydrogenation *** Tafel analysis revealed the exchange current density(i0)and standard heterogeneous rate constant(k0)for CuO-NF,yielding 3.44×10^(-6)A cm^(-2)and 3.77×10^(-6)cm^(-2)s^(-1)when NORR was driven by *** findings revealed the potential of CuO-NF for NO reduction and provided insights into the intricate interplay between crystal morphology,valence states,and electrochemical performance.

关键词： NORR Ammonia Synthesis Copper Morphology Valence States Mechanism

Transient AC Overvoltage Suppression Orientated Reactive Power Control of the Wind Turbine in the LCC-HVDC Sending Grid

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CES Transactions on Electrical Machines and Systems 2024年第2期8卷 152-161页

作者： Bo Pang Xiao Jin Quanwang Zhang yi Tang Kai Liao Jianwei Yang Zhengyou He IEEE College of Electrical Engineering Southwest Jiaotong UniversityChengdu 610031China State Grid Zhejiang Electric Power Company HangzhouChina

High-voltage direct current(HVDC) transmission is a crucial way to solve the reverse distribution of clean energy and loads. The line commutated converter-based HVDC(LCCHVDC) has become a vital structure for HVDC due to its high technological maturity and economic advantages. During the DC fault of LCC-HVDC, such as commutation failure, the reactive power regulation of the AC grid always lags the DC control process, causing overvoltage in the AC sending grid, which brings off-grid risk to the wind power generation based on power electronic devices. Nevertheless, considering that wind turbine generators have fast and flexible reactive power control capability, optimizing the reactive power control of wind turbines to participate in the transient overvoltage suppression of the sending grid not only improves the operational safety at the equipment level but also enhances the voltage stability of the system. This paper firstly analyses the impact of wind turbine's reactive power on AC transient overvoltage. Then, it proposes an improved voltage-reactive power control strategy, which contains a reactive power control delay compensation and a power command optimization based on the voltage time series prediction. The delay compensation is used to reduce the contribution of the untimely reactive power of wind turbines on transient overvoltage, and the power command optimization enables wind turbines to have the ability to regulate transient overvoltage, leading to the variation of AC voltage, thus suppressing the transient overvoltage. Finally, the effectiveness and feasibility of the proposed method are verified in a ±800kV/5000MW LCC-HVDC sending grid model based on MATLAB/Simulink.

关键词： Commutation failure LCC-HVDC Transient overvoltage Wind power

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基于高维点云分布的最优传输问题的研究

计算技术与自动化 2022年第1期41卷 141-147页

作者：阮一鸣河海大学理学院江苏南京211100

最优传输问题是寻求相对于给定的代价函数,把一种分布转化为另一种分布的最有效的方式,其具有较为深远的价值,其中基于点云的最优传输问题更是得到广泛的关注。针对高维的点云分布的最优传输问题,利用了分片最优传输的理论及其对应的优... 详细信息

最优传输问题是寻求相对于给定的代价函数,把一种分布转化为另一种分布的最有效的方式,其具有较为深远的价值,其中基于点云的最优传输问题更是得到广泛的关注。针对高维的点云分布的最优传输问题,利用了分片最优传输的理论及其对应的优化模型,提出一个改进梯度迭代的算法,以二维、三维点云分布为例进行数值实验,并将其与经典的方法进行比较,验证模型与算法的有效性。实验结果表明,本文模型及其算法在标准差、峰值信噪比、平均梯度等指标均有更高的性能。

关键词：最优传输 Wasserstein距离点云分布随机梯度迭代

Association of Chronic Kidney Disease with Coronary Heart Disease and Stroke Risks in Patients with Type 2 Diabetes Mellitus： An Observational Cross-sectional Study in Hangzhou, China

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Chinese Medical Journal 2017年第1期130卷 57-63页

作者： Xue Sun Jie He Xiao-Li Ji yi-ming Zhao Han-Yu Lou Xiao-Xiao Song Li-Zhen Shan ying-Xiu Kang Wen-Heng Zeng Xiao-Hong Pang Song-Zhao Zhang Yue Ding Yue-Zhong Ren Peng-Fei Shan Department of Endocrinology and Metabolism The Second Affiliated Hospital of Zhejiang University School of Medicine Hangzhou Zhejiang 310009 China Department of Clinical Laboratory The Second Affiliated Hospital of Zhejiang University School of Medicine Hangzhou Zhejiang 310009 China

Background： Chronic kidney disease （CKD） is an independent risk factor for cardiovascular disease （CVD）. However, the association between CKD and CVD risk in patients with type 2 diabetes mellitus （T2DM） in China has not yet been well investigated. This study aimed to determine the association of CKD with the risks of coronary heart disease （CHD） and stroke in a Chinese population with T2DM. Methods： A total of 1401 inpatients with T2DM at the Second Affiliated Hospital of Zhejiang University School of Medicine between April 2008 and November 2013 were included in this study. The CKD-Epidemiology Collaboration equation for Asians was used to classify CKD. The UK Prospective Diabetes Study risk engine was used to estimate the risks of CHD and stroke. Results： CHD risk was significantly increased with CKD stage （20.1%, 24.8%, and 34.3% in T2DM patients with no CKD, CKD Stage 1-2, and Stage 3-5, respectively; P 〈 0.001 for all）. The stroke risk was also increased with CKD stage （8.6%, 12.7%, and 25.4% in T2DM patients with no CKD, CKD Stage 1-2, and Stage 3-5, respectively; P 〈 0.001 for all）. Compared with no-CKD group, the odds ratios （ORs） for high CHD risk were 1.7 （P 〈 0.001） in the CKD Stage 1-2 group and 3.5 （P 〈 0.001） in the CKD Stage 3-5 group. The corresponding ORs for high stroke risk were 1.9 （P 〈 0.001） and 8.2 （P 〈 0.001）, respectively. Conclusion： In patients with T2DM, advanced CKD stage was associated with the increased risks of CHD and stroke.

关键词： Chronic Kidney Disease Coronary Disease Stroke Diabetes Mellitus