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Method for rapid warning and activity concentration estimates in onl.ne waterγ-spectrometry systems

nuclear Science and Techniques 2024年第3期35卷 1-12页

作者： Meng Wang Yi Gu Mao-l.n Xiong liang-quan ge Qing-Xian Zhang Guo-Qiang Zeng Heng lu Sheng-liang Guo College of nuclear Technology and Automation Engineering Chengdu University of TechnologyChengdu 610059China Applied nuclear Technology in geosciences Key laboratory of Sichuan Province (Chengdu University of Technology)Chengdu 610059China Chengdu new Ray Technology Co.ltd Chengdu 610052China

Onl.neγ-spectrometry systems for inl.nd waters,most of which extract samples in situ and in real time,are able to produce reliable activity concentration measurements for waterborne radionuclides only when they are distributed relatively uniformly and enter into a steady-state diffusion regime in the measurement *** protect residents’health and ensure the safety of the living environment,better timel.ness is required for this measurement *** address this issue,this study established a mathematical model of the onl.ne waterγ-spectrometry system so that rapid warning and activity estimates can be obtained for water under non-steady-state(nSS)*** addition,the detection efficiency of the detector for radionuclides during the nSS diffusion process was determined by applying the computational fluid dynamics technique in conjunction with Monte Carlo *** this basis,a method was developed that allowed the onl.ne waterγ-spectrometry system to provide rapid warning and activity concentration estimates for radionuclides in *** analysis of the nSS-mode measurements of^(40)K radioactive solutions with different activity concentrations determined the optimum warning threshold and measurement time for producing accurate activity concentration estimates for *** experimental results show that the proposed nSS measurement method is able to give warning and yield accurate activity concentration estimates for radionuclides 55.42 and 69.42 min after the entry of a 10 Bq/l^(40)K radioactive solution into the measurement chamber,*** times are much shorter than the 90 min required by the conventional measurement ***,the nSS measurement method allows the measurement system to give rapid(within approximately 15 min)warning when the activity concentrations of some radionuclides reach their respective limits stipulated in the Guidel.nes for Drinking-water Quality of the WHO,suggesting that this method con

关键词： Water radioactivity monitoring Dynamic detection efficiency Rapid warning Activity estimation

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Molecular packing tuning via chlorinated end group enables efficient binary organic solar cells over 18.5%

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Carbon Energy 2024年第3期6卷 196-203页

作者： Yafeng li Zhenyu Chen Xingzheng Yan Ziyi ge Zhejiang Business Technology Institute NingboZhejiangChina Zhejiang Engineering Research Center for Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingboZhejiangChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina

Designing novel.nonfullerene acceptors(nFAs)is of vital importance for the development of organic solar cells(OSC).Modification on the side chain and end group are two powerful tools to construct efficient ***,based on the high-performance l8BO,we selected 3-ethylheptyl to substitute the inner chain of 2-ethylhexyl,obtaining the backbone of *** we introduced different halogen atoms of fluorine and chlorine on 2-(3-oxo-2,3-dihydro-1Hinden-1-ylidene)mal.nonitrile end group(EG)to construct efficient nFAs named BOn3-F and BOn3-Cl,*** donor D18 was chosen to combine with two novel.nFAs to construct OSC ***,D18:BOn3-Cl-based device shows a remarkable power conversion efficiency(PCE)of 18.57%,with a high open-circuit voltage(V_(OC))of 0.907 V and an excell.nt fill factor(FF)of 80.44%,which is one of the highest binary PCE of devices based on D18 as the ***,BOn3-F-based device shows a relatively lower PCE of 17.79%with a decreased FF of 79.05%.The better photovoltaic performance is mainly attributed to the red-shifted absorption,higher electron and hole mobilities,reduced charge recombination,and enhanced molecular packing in the D18:BOn3-Cl ***,we performed stability tests on two binary systems;the D18:BOn3-Cl and D18:BOn3-F devices maintain 88.1%and 85.5%of their initial efficiencies after 169 h of storage at 85°C in an n2-filled glove box,*** work demonstrates the importance of selecting halogen atoms on EG and provides an efficient binary system of D18:BOn3-Cl for further improvement of PCE.

关键词： binary organic solar cell chlorinated end group molecular packing

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基于多关键点检测加权融合的无人机相对位姿估计算法

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自动化学报 2024年第7期50卷 1402-1416页

作者：葛泉波李凯张兴国南京信息工程大学自动化学院南京210044 江苏大数据分析与智能系统省高校重点实验室南京210044 大气环境与装备技术协同创新中心南京210044 中国飞行试验研究院西安710089

针对无人机降落阶段中无人船受水面波浪影响导致图像产生运动模糊以及获取无人机相对位姿精度低且鲁棒性差的问题,提出一种基于多模型关键点加权融合的6D目标位姿估计算法,以提高位姿估计的精度和鲁棒性.首先,基于无人船陀螺仪得到的运... 详细信息

针对无人机降落阶段中无人船受水面波浪影响导致图像产生运动模糊以及获取无人机相对位姿精度低且鲁棒性差的问题,提出一种基于多模型关键点加权融合的6D目标位姿估计算法,以提高位姿估计的精度和鲁棒性.首先,基于无人船陀螺仪得到的运动信息设计帧间抖动模型,通过还原图像信息达到降低图像噪声的目的;然后,设计一种多模型的级联回归特征提取算法,通过多模型检测舰载视觉系统获取的图像,以增强特征空间的多样性;同时,将检测过程中关键点定位形状增量集作为融合权重对模型进行加权融合,以提高特征空间的鲁棒性;紧接着,利用EPnP(Efficient perspective-n-point)计算关键点相机坐标系坐标,将PnP(Perspective-n-point)问题转化为ICP(Iterative closest point)问题;最终,基于关键点解集的离散度为关键点赋权,使用ICP算法求解位姿以削弱深度信息对位姿的影响.仿真结果表明,该算法能够建立一个精度更高的特征空间,使得位姿解算时特征映射的损失降低,最终提高位姿解算的精度.

关键词：辅助无人机降落舰载视觉系统 6D 位姿估计加权融合关键点检测级联特征提取

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Slow magnetic relaxation and photoluminescence behaviors of dil.nthanide complexes bearing n_(8)O_(2)donor macrocyclic ligand

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Journal of Rare Earths 2024年第7期42卷 1298-1303,I0004页

作者： Pei-Yu liao Yu-quan Qi Zhen li Jian-Hua Jia Ming-liang Tong Key laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of ChemistrySun Yat-Sen UniversityGuangzhou510006China

On account of the complicated magnetic exchange interactions between l.nthanide ions,binuclear l.nthanide complexes have broad application prospect in the field of single-molecule ***,it is necessary to develop reasonable bridging ligands to manipulate the directional assembly of binuclear l.nthanide ***,we selected the macrocyclic ligand l^(n_(8)O_(2))to build up two new dil.nthanide complexes[ln_(2)(ln_(8)O_(2))(OpyO)_(2)(H_(2)O)2](nO_(3))_(2)(1-ln,ln=Dy,Tb;ln_(8)O_(2)=hexamethyl-tetraaza-dioxe-dipyrazolacycloicosaphane-2,9,12,19-tetraene;OpyOH=2-pyridinol-1-oxide).Dynamic magnetic studies show that 1-Dy exhibits slow relaxation behavior under a 1 kOe applied *** fitting analysis of relaxation times gives the effective energy barrier of 38.2 cm^(−1),and reveals that the slow magnetic relaxation behavior is dominated by the Orbach and Raman ***-resolution luminescence emission spectrum indicates the energy gap of 36.8 cm^(−1)between the ground state and the first excited state,consistent with the magnetic measurement results.1-Tb exhibits brilliant characteristic green light emission under UV light *** absolute quantum yield of 1-Tb is 44.8%,and its first-order fitted decay lifetime is 779.21μs at room *** study provides the way for directional construction of high-performance molecular materials with magnetic and optical dual-function.

关键词： Dil.nthanide complexes Single-molecule magnets Macrocyclic ligand Photoluminescence behavior Rare earths

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Potassium alleviated high nitrogen-induced apple growth inhibition by regulating photosynthetic nitrogen allocation and enhancing nitrogen utilization capacity

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Horticultural Pl.nt Journal 2024年第1期10卷 1-14页

作者： Xinxiang Xu Guangyuan liu Jingquan liu Mengxue lyu Fen Wang Yue Xing Hao Meng Min li Yu Jiang ge Tian Zhanl.ng Zhu Yuanmao Jiang Shunfeng ge State Key laboratory of Crop Biology College of Horticulture Science and EngineeringShandong Agricultural UniversityTai'anShandong 271018China Key laboratory of Biochemistry and Molecular Biology in Universities of Shandong College of Biological and Agricultural EngineeringWeifang UniversityWeifangShandong 261061China

There is a close relationship between potassium(K)and nitrogen(n).However,the roles of K under high n conditions remain *** a hydroponics approach,we monitored the morphological,physiological,and molecular changes in M9T337 apple(Malus domestica)rootstocks under different nitrate(10 and 30 mmol·l^(-1)nO_(3)^(-))and K supply(0.5,6,10,and 20 mmol·l_(-1)K^(+))*** revealed that high nitrate inhibited the root growth of M9T337 rootstocks,downregulated the expressions of K transporter genes(MdPT5,MdHKT1,and MdATK1),and reduced the net nO3-and K+influx at the surface of roots,thereby resulting in an n/K imbal.nce in *** investigation showed that 10 mmol·l^(-1)K increased the activity of n metabolic enzymes(nR,GS,niR,and GOGAT),upregulated the expressions of genes related to nitrate uptake and transport(MdnRT1.1,MdnRT1.2,MdnRT1.5,and MdnRT2.4),promoted15n transport from the roots to the shoots,optimized leaf n distribution,and improved photosynthetic n utilization efficiency under high nitrate *** results suggest that the negative effects of high nitrate may be related to the n/K imbal.nce and that reducing n/K in pl.nts by increasing K supply level can effectively alleviate the inhibition of n assimilation by high nitrate stress.

关键词： Apple rootstock K level High nitrate stress n metabolism ^(15)n

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Detoxification strategy of Microcystis aeruginosa to the toxicity of Cd(Ⅱ):role of EPS in alleviating toxicity

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Journal of Oceanology and limnology 2024年第3期42卷 802-815页

作者： Xingye HAn Fangyuan lIU Yibo ZHAnG Kai CHEnG Heyun WAnG Hongmei ge Innovation Demonstration Base of Ecological Environment geotechnical and Ecological Restoration of Rivers and lakes School of Civil EngineeringArchitecture and EnvironmentHubei University of TechnologyWuhan 430068China School of Environmental Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China national Engineering Research Center of Advanced Technology and Equipment for Water Environment Pollution Monitoring Wuhan 430068China

Although many studies have found that cadmium(Cd)can be toxic to microalgae,only a few reports focused on the role of extracellular polymeric substances(EPS)in Cd(Ⅱ)*** biochemical and physiological endpoints of Microcystis aeruginosa,including the composition and functional groups of soluble EPS(Sl-EPS),loosely bound EPS(lB-EPS),and tightly bound EPS(TB-EPS),were detected to elucidate the toxicity and detoxification mechanisms of Cd(Ⅱ)for *** and physiological assays on *** showed that the 0.25-mg/l Cd(Ⅱ)resulted in a larger inhibition on growth and F_(v)/F_(m).nevertheless,Cd(Ⅱ)significantly induced much higher contents of superoxide dismutase(SOD),intracellular microcystin lR(MC-lR),extracellular MC-lR,and *** electron microscopy with energy dispersive X-ray spectroscopy confirmed that Cd(Ⅱ)was absorbed into the EPS *** transform infrared spectrum analysis revealed that the functional groups bound with Cd(Ⅱ)of algae biomass,Sl-EPS,lB-EPS,and TB-EPS were somewhat *** C=O/C=n groups ofδ-lactam or protein were their prominent functional groups,suggesting that amide or proteins in the EPS played a key role in the adsorption in Cd(Ⅱ).The concentration of 0.25 mg/l of Cd(Ⅱ)may change the chemical structure of EPS by altering the production of protein-like substances containing *** study indicated that *** could detoxify Cd(Ⅱ)stress via induction of antioxidant capacity(higher SOD activity and MC synthesis),EPS production,and modification in chemical structure of EPS.

关键词： Microcystis aeruginosa cadmium extracellular polymeric substances(EPS) microcystin detoxification

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Anti-lymphangiogenesis for boosting drug accumulation in tumors

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Signal Transduction and Targeted Therapy 2024年第5期9卷 2161-2175页

作者： Chunl.ng Wang Junchao Xu Xiaoyu Cheng ge Sun Fenfen li Guangjun nie Yinl.ng Zhang CAS Key laboratory for Biomedical Effects of nanomaterials&nanosafety CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China Sino-Danish College University of Chinese Academy of SciencesBeijing 100190China Sino-Danish Center for Education and Research Beijing 100190China Department of Bioengineering University of PennsylvaniaPhiladelphiaPA 19104USA School of nanoscience and Engineering University of Chinese Academy of SciencesBeijing 100049China

The inadequate tumor accumulation of anti-cancer agents is a major shortcoming of current therapeutic drugs and remains an even more significant concern in the cl.nical prospects for *** strategies aiming at regulating the intratumoral permeability of therapeutic drugs have been explored in precl.nical studies,with a primary focus on vascular regulation and stromal ***,these methods may trigger or facilitate tumor metastasis as a ***,there is an urgent need for innovative strategies that boost intratumoral drug accumulation without compromising treatment *** another important factor affecting drug tumor accumulation besides vasculature and stroma,the impact of tumor-associated lymphatic vessels(lVs)has not been widely *** the current research,we verified that anlotinib,a tyrosine kinase inhibitor with anti-lymphangiogenesis activity,and SAR131675,a selective VEGFR-3 inhibitor,effectively decreased the density of tumor lymphatic vessels in mouse cancer models,further enhancing drug accumulation in tumor *** combining anlotinib with therapeutic drugs,including doxorubicin(Dox),liposomal doxorubicin(lip-Dox),and anti-PD-l1 antibody,we observed improved anti-tumor efficacy in comparison with monotherapy ***,this strategy significantly reduced tumor metastasis and elicited stronger anti-tumor immune *** work describes a new,cl.nically transferrable approach to augmenting intratumoral drug accumulation,which shows great potential to address the current,unsatisfactory efficacies of therapeutic drugs without introducing metastatic risk.

关键词： drugs angiogenesis metastasis

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串联阀芯阀口独立控制多路阀设计及特性研究

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机械工程学报 2024年第4期60卷 113-125页

作者：赵星宇王波权龙葛磊周兴炜太原理工大学新型传感器与智能控制教育部重点实验室太原030024

现有多路阀存在大流量低压损控制难、动态特性差等问题,且阀芯机械固联,压损大、自由度低,难以满足高端主机对操纵性、节能性、智能化、负载适应性的需求。为此,基于插装阀大流量控制特性好和滑阀微动性能好的优点,创新提出换向滑阀的... 详细信息

现有多路阀存在大流量低压损控制难、动态特性差等问题,且阀芯机械固联,压损大、自由度低,难以满足高端主机对操纵性、节能性、智能化、负载适应性的需求。为此,基于插装阀大流量控制特性好和滑阀微动性能好的优点,创新提出换向滑阀的进出口串接两个流量放大型比例插装阀的新构型,研制串联阀芯阀口独立控制多路阀。两个插装阀可以根据控制需求设计为流量控制或压力控制功能,系统自由度高,具有很高的智能化潜力。为了实现流量和压力的高精度冗余控制,设计串联式双级位移闭环+并联式流量/压力闭环控制策略,通过仿真研究位置、流量、压力三种工作模式下阀的特性。并试制样阀,搭建试验台对压损特性、位移滞环、流量控制特性、动态响应特性和稳态负载特性进行了测试。结果表明,样阀额定流量达到300 l/min,主阀位移滞环小于1%;主阀阶跃响应小于35 ms,具有较高的动态特性;流量最大偏差小于5%,流量控制精度高。

关键词：多路阀阀口独立控制稳态特性动态特性

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Combination therapy with oncolytic virus and T cells or mRnA vaccine amplifies antitumor effects

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Signal Transduction and Targeted Therapy 2024年第6期9卷 2655-2668页

作者： Rao Fu Ruoyao Qi Hual.ng Xiong Xing lei Yao Jiang Jinhang He Feng Chen liang Zhang Dekui Qiu Yiyi Chen Meifeng nie Xueran Guo Yuhe Zhu Jinlei Zhang Mingxi Yue Jiali Cao Guosong Wang Yuqiong Que Mujing Fang Yingbin Wang Yixin Chen Tong Cheng Shengxiang ge Jun Zhang quan Yuan Tianying Zhang ningshao Xia State Key laboratory of Vaccines for Infectious Diseases Xiang An Biomedicine LaboratoryDepartment of Laboratory MedicineSchool of Public Health&School of Life SciencesXiamen UniversityXiamen 361102 FujianChina national Institute of Diagnostics and Vaccine Development in Infectious Diseases Xiamen 361102 FujianChina

Antitumor therapies based on adoptively transferred T cells or oncolytic viruses have made significant progress in recent years,but the limited efficiency of their infiltration into solid tumors makes it difficult to achieve desired antitumor effects when used *** this study,an oncolytic virus(rVSV-lCMVG)that is not prone to induce virus-neutralizing antibodies was designed and combined with adoptively transferred T *** transforming the immunosuppressive tumor microenvironment into an immunosensitive one,in B16 tumor-bearing mice,combination therapy showed superior antitumor effects than *** occurred whether the OV was administered intratumorally or *** therapy significantly increased cytokine and chemokine levels within tumors and recruited CD8^(+)T cells to the TME to trigger antitumor immune *** with adoptively transferred T cells and subsequent oncolytic virotherapy sensitizes refractory tumors by boosting T-cell recruitment,downregulating the expression of PD-1,and restoring effector T-cell *** offer a combination therapy with greater translational value,mRnA vaccines were introduced to induce tumor-specific T cells instead of adoptively transferred T *** combination of OVs and mRnA vaccine also displays a significant reduction in tumor burden and prol.nged *** study proposed a rational combination therapy of OVs with adoptive T-cell transfer or mRnA vaccines encoding tumor-associated antigens,in terms of synergistic efficacy and mechanism.

关键词： transferred rational boosting

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含复杂电源结构省级电力系统电力电量平衡方法

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高电压技术 2024年第3期50卷 1100-1110,I0003-I0006页

作者：李程昊张佳伟姚德贵李晓萌葛晟吕泉国网河南省电力公司电力科学研究院郑州450052 国网山东省电力公司东营供电公司东营257100 大连理工大学电气工程学院大连116024

随着风电、光伏大规模接入电力系统,为计及其出力的不确定性,需要以年为尺度、小时为颗粒度进行电力电量平衡分析。以含复杂电源结构、内部断面限制、外部交直流受电的省级电力系统为对象,提出了一种新的电力电量平衡分析方法。该方法... 详细信息

随着风电、光伏大规模接入电力系统,为计及其出力的不确定性,需要以年为尺度、小时为颗粒度进行电力电量平衡分析。以含复杂电源结构、内部断面限制、外部交直流受电的省级电力系统为对象,提出了一种新的电力电量平衡分析方法。该方法以日周期进行滚动平衡分析,针对特定日:通过对各分区同类电源进行聚合以简化问题、降低求解规模;通过构建火电开机优化模型以在考虑断面限制下以均衡开机为原则确定各分区火电开机容量;通过合理设计优化调度模型以在满足不同分区同类电源均衡调度、同一分区不同种类电源顺序调用原则下实现电力平衡计算。算例以实际省级电力系统数据为基础,验证了该方法的有效性、合理性、快速性。

关键词：电力电量平衡复杂电源结构断面约束电源聚合逐日滚动分区均衡电源顺序调用

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