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不同排水再利用措施对土壤水盐运移的影响

节水灌溉 2024年第7期 53-61页

作者：郭帅帅马韬陈凯文蒋燕华丁继辉彭溯涵俞双恩河海大学农业科学与工程学院南京210098 江苏省水利工程规划办公室南京210098

为了探明盐碱地不同农田排水再利用措施对区域水盐运移转化的影响,以河套灌区永联试验区为研究区,对研究区2017-2018年夏灌秋浇期明沟排水、集水井水水质进行定位监测,采用SWAP-WOFOST模型对土壤0~40 cm水盐量和大田玉米、向日葵产量进... 详细信息

为了探明盐碱地不同农田排水再利用措施对区域水盐运移转化的影响,以河套灌区永联试验区为研究区,对研究区2017-2018年夏灌秋浇期明沟排水、集水井水水质进行定位监测,采用SWAP-WOFOST模型对土壤0~40 cm水盐量和大田玉米、向日葵产量进行校核与验证,根据研究区灌排条件设置明沟排水再利用情景(渠水∶井水∶沟水=4∶3∶3、5∶3∶2、6∶3∶1)与集水井水再利用情景(渠水∶机井水∶集水井水=4∶3∶3、5∶3∶2、6∶3∶1),以土壤脱盐率(SDR)和水分生产率(WIDP)为评价指标对情景模拟结果进行评价。结果表明,SWAP-WOFOST模型能较好地模拟河套平原土壤水盐变化与作物生长过程,R2分别大于0.73、0.63、0.65。明沟上下游水体缺乏连通性,其水质空间差异性较大,研究区不同土地利用蒸散发量、产量及盐分浓度受灌排措施与地下水埋深影响显著,在灌水不利的区域土壤盐分浓度较高,地下水埋深较浅,蒸散量较大,是导致作物产量降低的主要原因。情景模拟结果表明,集水井水再利用相较于明沟排水具有更好的积极作用,随着明沟排水再利用的比例增加,土壤含盐量成上升趋势,分别增加3%、6%、11%,同时DIWP无明显变化,表明明沟排水基本不适用于农田回灌;集水井水再利用降低了农田地下水埋深,有利于降低耕层土壤EC(R2=0.81),土壤脱盐率可提升至36.2%~41.8%。

关键词：水盐运移 SWAP-WOFOST模型明沟排水集水井水水分生产率

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Reference-frame-independent quantum key distribution with two-way classical communication

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Chinese Physics B 2024年第10期33卷 146-152页

作者： Chun Zhou Hai-Tao Wang Yi-Fei Lu Xiao-Lei jiang Yan-Mei Zhao Yu Zhou Yang Wang jia-ji Li Yan-Yang Zhou Xiang Wang Hong-Wei Li Wan-su Bao Henan Key Laboratory of Quantum Information and Cryptography SSF IEUZhengzhou 450001China

The data post-processing scheme based on two-way classical communication(TWCC)can improve the tolerable bit error rate and extend the maximal transmission distance when used in a quantum key distribution(QKD)*** this study,we apply the TWCC method to improve the performance of reference-frame-independent quantum key distribution(RFI-QKD),and analyze the influence of the TWCC method on the performance of decoy-state RFI-QKD in both asymptotic and non-asymptotic *** numerical simulation results show that the TWCC method is able to extend the maximal transmission distance from 175 km to 198 km and improve the tolerable bit error rate from 10.48%to 16.75%.At the same time,the performance of RFI-QKD in terms of the secret key rate and maximum transmission distance are still greatly improved when statistical fluctuations are *** conclude that RFI-QKD with the TWCC method is of practical interest.

关键词： quantum key distribution reference-frame-independent two-way classical communication

Current status of nerve infiltration by skip metastases in colorectal cancer

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Oncology and Translational Medicine 2024年第3期10卷 126-131页

作者： jie Zhou Yan-Wei Gao Ya-Dong ji Ri-Na su Shuang Zhang Ze-He Li Inner Mongolia Medical University Hohhot 010000Inner MongoliaChina Abdominal Tumor surgery Inner Mongolia Autonomous Region People’s HospitalHohhot 010017Inner MongoliaChina Baotou Medical College Baotou 014000Inner MongoliaChina Gastroenterology Department Arongqi People’s HospitalHulun Buir 021000Inner MongoliaChina

Colorectal cancer(CRC)is a prevalent malignant tumor,with the global new cases reaching 1.9316 million and deaths reaching 935,200 in *** China,therewere 555,500 new cases of CRC,with an age-standardized incidence rate of 24.07 per 10million,and 286,200 *** accounts for approximately 30%of new cases and deaths from CRC worldwide,with East Asia accounting for over 75%.Initially,CRC presents as local tumor growth,but it has the potential to spread to other body parts over *** infiltration(PNI)is a relatively less discussed route of diffusion,yet it plays a crucial role in the progression and prognosis of *** often occurs alongside local lymph nodes and distant metastases,posing challenges for treatment and *** symptoms,radiographic findings,and histopathological examination can be used to diagnose PNI with *** commonly include local pain,paresthesia,andmotor *** helps identify the mass’s location and relationship to nerves,whereas histopathological examination confirms the *** of PNI skipmetastases is similar to other CRC metastases,including surgical resection,chemotherapy,radiotherapy,and targeted *** resection is the primary therapeutic approach,but the wider range of metastasis in PNI skip transfer may limit its *** cases where surgical resection is not possible,chemotherapy,radiotherapy,and targeted therapy are used to control tumor *** conclusion,PNI skip metastases increase the risk of poor prognosis for CRC,requiring a comprehensive approach with multiple treatments to prevent disease *** detection and treatment are vital to improving prognosis.

关键词： Neve invasion in colorectal Skip metastases Perineural infiltration

内插缝Helmholtz共振腔吸声超结构的机理分析与优化设计

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物理学报 2024年第11期73卷 164-177页

作者：贾静肖勇王勋年王帅星温激鸿中国空气动力研究与发展中心气动噪声控制重点实验室绵阳621000 国防科技大学智能科学学院装备综合保障技术重点实验室长沙410073

低频噪声一直是噪声控制领域比较棘手的问题,近年来吸声超结构的蓬勃发展为低频噪声控制提供了新理念.本文提出了一种内插缝Helmholtz共振腔吸声超结构,建立了其吸声特性计算的理论解析方法,并与数值计算方法对比,验证了解析方法的有效... 详细信息

低频噪声一直是噪声控制领域比较棘手的问题,近年来吸声超结构的蓬勃发展为低频噪声控制提供了新理念.本文提出了一种内插缝Helmholtz共振腔吸声超结构,建立了其吸声特性计算的理论解析方法,并与数值计算方法对比,验证了解析方法的有效性.随后,从吸声曲线、简化等效模型、归一化声阻抗、声压云图与质点速度分布等多角度对吸声特性及吸声机理进行了深入分析.进一步,采用差分优化算法开展了多元胞并联耦合宽带优化设计,优化后典型超结构实现了90 mm厚度下在170—380 Hz低频段内平均吸声系数达到0.86的优异吸声效果.最后,制备了若干样件,开展吸声测试,实验结果与理论结果符合良好,验证了解析建模与优化设计方法的准确性.本文提出的内插缝Helmholtz共振腔吸声超结构具有结构简单、低频吸声性能好,且易于加工制造等特点,在低频噪声控制领域具有广阔的应用前景.

关键词：吸声超结构 Helmholtz共鸣器内插缝低频吸声

Ionic liquid-based in situ dynamically self-assembled cationic lipid nanocomplexes(CLNs)for enhanced intranasal siRNA delivery

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Chinese Chemical Letters 2024年第7期35卷 367-371页

作者： Luyu Zhang Zirong Dong shuai Yu Guangyue Li Weiwen Kong Wenjuan Liu Haisheng He Yi Lu Wei Wu jianping Qi Key Laboratory of Smart Drug Delivery of MOE School of PharmacyFudan UniversityShanghai 201203China School of Pharmacy Shandong Academy of SciencesQilu University of TechnologyJi'nan 250353China College of Chemical Engineering North China University of Science and TechnologyTangshan 063210China

This research aims to develop a non-invasive strategy for small interfering RNA(siRNA)nasal delivery based on ionic liquids(ILs)and cationic lipid(2,3-dioleoyloxy-propyl)-trimethylammonium-chloride(DOTAP).Other than the classical role of penetration enhancer,ILs also acted as superior solvents to simultaneously load siRNA and DOTAP,forming siRNA-DOTAP-ILs(siRNA-DILs)*** nasal mucosa penetration,DOTAP and ILs components self-assembled into cationic lipid nanocomplexes to load siRNA for enhanced in situ *** siRNA-DILs demonstrated resistance against RNase,significant mucosa penetration,prolonged nasal retention,and satisfying gene-silencing efficacy at lower ***,DILs were also able to deliver KCa3.1-targeted siRNA effectively for the treatment of allergic rhinitis in rat model by nasal ***,DILs have great potentials to deliver biological macromolecules across nasal mucosa by in situ dynamic self-assembly.

关键词： Ionic liquids Cationic lipids Lipid nanoparticles siRNA Allergic rhinitis

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用于红外和雷达波隐身的水泥基复合材料

材料导报 2024年第5期38卷 22-30页

作者：马超解帅王永超冀志江吴子豪王静中国建筑材料科学研究总院有限公司绿色建筑材料国家重点实验室北京100024

红外和雷达波隐身主要是通过降低目标的红外辐射信号和雷达回波信号来提高目标的隐蔽性。将相变材料与炭黑封装为相变单元,并将其与膨胀珍珠岩-磁粉/水泥复合材料结合,研制出一种兼具红外和雷达波隐身的双功能水泥基复合材料,对其吸波... 详细信息

红外和雷达波隐身主要是通过降低目标的红外辐射信号和雷达回波信号来提高目标的隐蔽性。将相变材料与炭黑封装为相变单元,并将其与膨胀珍珠岩-磁粉/水泥复合材料结合,研制出一种兼具红外和雷达波隐身的双功能水泥基复合材料,对其吸波性能和热性能进行试验与仿真研究。结果表明:炭黑对相变材料相变温度的影响较小,潜热仅降低了约1.9%;500次冷热循环后,相变材料的潜热留存率为78.3%,循环稳定性较好。相变单元和膨胀珍珠岩均可以提高水泥基复合材料的吸波能力,且反射损耗在-5~-15 dB可调。相变单元通过吸收大量热量来降低目标外表面温度,削弱红外辐射。相变材料的加入会增加水泥基复合材料的热导率,但相变材料高储热密度和珍珠岩低热导率的共同作用使得水泥基复合材料的隔热效应更加显著,从而降低目标的红外辐射信号。仿真结果表明:磁损耗仅出现在水泥基体中,相变单元通过电阻损耗来影响水泥基复合材料的吸波性能。热量传递在相变单元处受阻,传导热通量在相变单元边缘处的传输过程出现弯曲。当相变材料相变完成后,热量趋于均匀分布。因此,水泥基复合材料可通过损耗电磁波来降低雷达回波信号,通过相变材料吸收目标的热量来降低红外辐射,从而实现不同复杂环境下建筑材料的红外和雷达波等多波段隐身。

关键词：水泥基复合材料红外隐身雷达波隐身相变材料有限元法

Catalpa bignonioides extract improves exercise performance through regulation of growth and metabolism in skeletal muscles

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Asian Pacific Journal of Tropical Biomedicine 2024年第2期14卷 47-54页

作者： Hoibin Jeong Dong-joo Lee sung-Pil Kwon SeonJu Park Song-Rae Kim Seung Hyun Kim Jae-Il Park Deug-chan Lee Kyung-Min Choi WonWoo Lee ji-Won Park Bohyun Yun su-Hyeon Cho Kil-Nam Kim Seoul Center Korea Basic Science InstituteSeoul 02841Republic of Korea Chuncheon Center Korea Basic Science InstituteChuncheon 24341Republic of Korea Research&Development Center Chungdam CDC JNPharm LLC.Chuncheon 24341Republic of Korea Department of Biomedical Technology Kangwon National UniversityChuncheon 24341Republic of Korea Yonsei Institute of Pharmaceutical Sciences College of PharmacyYonsei UniversityIncheon 21983Republic of Korea Gwangju Center Korea Basic Science InstituteGwangju 61751Republic of Korea Honam National Institute of Biological Resources 99Gohadoan-gilMokpo-siJeollanam-do58762Republic of Korea Department of Bio-analysis Science University of Science&TechnologyDaejeon34113Republic of Korea

Objective:To evaluate the effects of Catalpa bignonioides fruit extract on the promotion of muscle growth and muscular capacity in vitro and in ***:Cell viability was measured using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide *** proliferation was assessed using a 5-bromo-2’-deoxyuridine(BrdU)assay *** blot analysis was performed to determine the protein expressions of related *** effects of Catalpa bignonioides extract were investigated in mice using the treadmill exhaustion test and whole-limb grip strength *** composition analysis was performed using high-performance liquid chromatography(HPLC).Results:Catalpa bignonioides extract increased the proliferation of C2C12 mouse myoblasts by activating the Akt/mTOR signaling *** also induced metabolic changes,increasing the number of mitochondria and glucose metabolism by phosphorylating adenosine monophosphate-activated protein *** an in vivo study,the extract-treated mice showed improved motor abilities,such as muscular endurance and grip ***,HPLC analysis showed that vanillic acid may be the main component of the Catalpa bignonioides extract that enhanced muscle ***:Catalpa bignonioides improves exercise performance through regulation of growth and metabolism in skeletal muscles,suggesting its potential as an effective natural agent for improving muscular strength.

关键词： Catalpa bignonioides Skeletal muscle Cell proliferation Mitochondria Energy metabolism C2C12

基于聚类分析的土壤重金属分体式LIBS检测方法研究

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光谱学与光谱分析 2024年第9期44卷 2506-2513页

作者：关丛荣梁帅陈吉文王占扩北方工业大学北京100144

土壤是人类赖以生存的物质基础,它的特性与人们的生产生活密切相关,传统土壤重金属检测方法如原子吸收光谱法、电感耦合等离子体质谱法分析能力较弱且价格昂贵,因此亟需一种开发低成本易操作的土壤多种元素同时定量分析方法。激光诱导... 详细信息

土壤是人类赖以生存的物质基础,它的特性与人们的生产生活密切相关,传统土壤重金属检测方法如原子吸收光谱法、电感耦合等离子体质谱法分析能力较弱且价格昂贵,因此亟需一种开发低成本易操作的土壤多种元素同时定量分析方法。激光诱导击穿光谱(LIBS)技术因其分析快速、多元素同时分析等优点被广泛关注,但由于其体积较大不便于携带并且大多应用于实验室分析,为了满足现场检测的需求,研制了一台分体式现场LIBS检测仪,其设计是将仪器分为探测头和机箱两部分并通过包塑管进行连接,采用微型二极管泵浦激光器,脉冲能量可达100mJ,波长1064nm,重复频率为1~10Hz;此外采用多通道高分辨率光谱仪,提高LIBS的分析性能;为了减小辐射背景干扰,利用FPGA实现μs级延迟时间功能。对其应用在11种土壤获取光谱数据,实验设置脉冲能量为100mJ,延迟时间设为1μs,积分时间2ms,每个样品采集10个不同位置的光谱,每个位置测量20次,共采集200个光谱数据,为减少噪声干扰,对每个样品的光谱数据进行均值预处理后再进行Beads算法基线校正,利用PCA主成分分析得到贡献率最大的3个主成分分量,再通过Kmeans++算法对不同地区不同类型的11种土壤进行聚类分析,将相同类别的土壤代入偏最小二乘(PLSR)算法,每个元素选取两个特征谱线以及上下各10个点来增强光谱信息,选择一种样品作为预测对Cu、Cr、Ni、Co、Cd五种土壤重金属元素进行定量分析。结果表明,与未进行聚类分析相比,此方法可明显提高元素的拟合相关系数,五种重金属元素的相关系数分别从0.953、0.992、0.989、0.982、0.99提高至0.999、0.998、0.9995、0.9965、0.993,相关系数均达到0.99及以上满足LIBS线性分析要求,其预测结果与实际含量之间的平均相对误差分别从83.45%、16.03%、22.94%、43.91%、125.768%提高至1.14%、0.99%、0.895%、1.879%、1.862%,可以发现经过聚类分析后,其预测误差大大降低,均在5%以内,具有较好的分析性能,五种元素的相关系数和预测误差相比于直接进行PLSR方法均有提升。PCA与Kmeans++结合的方法能够更准确的进行聚类,在降维后进行聚类可以减少噪声和冗余信息的影响,加快计算速度,减少异常点对聚类效果的影响提高鲁棒性。

关键词：土壤聚类分析偏最小二乘法激光诱导击穿光谱

轻质高强硅氧碳气凝胶的制备及其高温隔热性能

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硅酸盐学报 2024年第9期52卷 2773-2779页

作者：祝文霞王昊季惠明苏冬天津大学材料科学与工程学院天津300350

陶瓷气凝胶因其优异的隔热性能和高温稳定性而成为新型的高性能热防护材料,但是低的强度限制了其应用和发展。本工作以聚甲基氢硅氧烷作为前驱体、四乙烯基环四硅氧烷为交联剂,通过水热反应和冷冻成型,再经热解过程制备出轻质高强、耐... 详细信息

陶瓷气凝胶因其优异的隔热性能和高温稳定性而成为新型的高性能热防护材料,但是低的强度限制了其应用和发展。本工作以聚甲基氢硅氧烷作为前驱体、四乙烯基环四硅氧烷为交联剂,通过水热反应和冷冻成型,再经热解过程制备出轻质高强、耐高温的硅氧碳(SiOC)陶瓷气凝胶。多孔的蜂窝结构赋予SiOC气凝胶低的密度(0.13 g·cm^(-3))和热导率(0.0655 W·m^(-1)·K^(-1))以及高的抗压强度(0.96 MPa)。同时,SiOC气凝胶表现出优异的高温稳定性,在1400℃热处理和800℃氧化处理后未出现结构的坍塌,热导率和抗压强度基本保持不变。

关键词：硅氧碳陶瓷隔热性能高温稳定性抗氧化性能