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Effects of post-heading high temperature on some quality traits of malt barley

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Journal of Integrative Agriculture 2020年第11期19卷 2674-2679页

作者： NI Sheng-jing ZHAO Hui-fang zhang Guo-ping Department of Agronomy College of Agriculture and BiotechnologyZhejiang UniversityHangzhou 310029P.R.China

Global change is bringing barley with more frequency of suffering from high ***,little has been known about the influence of high temperature on malt quality *** this study,we investigated the impact of 1-wk heat stress(32°C/26°C,day/night,12 h/12 h)initiating from the 7th(HT7)and 14th(HT14)days after heading on some grain and malt quality traits of two barley *** comparison with normal temperature(24°C/18°C,day/night,12 h/12 h),heat stress significantly reduced kernel weight,seed setting rate and grains per spike:HT7 having a larger effect than ***,total protein andβ-glucan contents,andβ-amylase and limit dextrinase activities were significantly increased under high temperature,with HT7-treated plants showing larger ***,the different changes of four protein fractions under heat stress were found in the two barley cultivars,indicating the possibility of breaking positive association between protein content and enzyme activity.

关键词： barley β-glucan β-amylase heat stress limited dextrinase protein

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极地多用途船工装脚手架数字化干涉解决策略

船舶标准化工程师 2025年第1期58卷 54-56,79页

作者：张平大连中远海运重工有限公司辽宁大连116113

工装脚手架是船舶建造过程中必不可少的辅助工装,而结构干涉一直是工装脚手架搭设作业难以回避的问题。以极地多用途运输船为依托,通过梳理设计过程中工装脚手架的数字化设计思路,从设计方法、技术难点和解决策略等方面进行分析,提出一... 详细信息

工装脚手架是船舶建造过程中必不可少的辅助工装,而结构干涉一直是工装脚手架搭设作业难以回避的问题。以极地多用途运输船为依托,通过梳理设计过程中工装脚手架的数字化设计思路,从设计方法、技术难点和解决策略等方面进行分析,提出一种应用三维模拟技术解决工装脚手架结构干涉问题的方法,结果表明:该方法可有效降低现场工装脚手架出现干涉情况的几率。研究结果对船舶工装脚手架的干涉避碰问题解决具有一定的参考价值。

关键词：极地多用途运输船工装脚手架数字化三维模拟干涉避碰

VA族元素修饰对二维AlN电磁性质调控的理论研究

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原子与分子物理学报 2025年第6期42卷 159-166页

作者：莫秋燕陈广萍张颂荆涛吴家隐凯里学院大数据工程学院凯里556011 凯里学院理学院凯里556011 广东开放大学(广东理工职业学院)工程技术学院广州510091

采用基于密度泛函理论的第一性原理计算方法,研究了VA族元素(N、P、As、Sb、Bi)对二维AlN电磁性质的影响.研究发现,VA族元素修饰后,二维AlN的能带结构发生显著劈裂,表明体系转变为磁性材料.同时,导带底部向低能量区域移动,使得二维AlN... 详细信息

采用基于密度泛函理论的第一性原理计算方法,研究了VA族元素(N、P、As、Sb、Bi)对二维AlN电磁性质的影响.研究发现,VA族元素修饰后,二维AlN的能带结构发生显著劈裂,表明体系转变为磁性材料.同时,导带底部向低能量区域移动,使得二维AlN的吸收阈值从紫外线区域扩展至可见光区域.因此,VA族元素的修饰显著调控了二维AlN的电子结构和磁性,为实现可见光响应的光电子和自旋电子器件提供了新思路和可能性.

关键词：二维AlN 第一性原理修饰电子结构

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鼻咽部血管内大B细胞性淋巴瘤临床病理特征

诊断病理学杂志 2016年第9期23卷 673-675页

作者：段瑞吴继华景青萍张建中解放军306医院病理科北京100101

目的探讨鼻咽部血管内大B细胞淋巴瘤(IVL)的临床病理特点及鉴别诊断。方法对1例鼻咽部血管内大B细胞淋巴瘤的临床病理学特点及免疫表型进行分析,并结合相关文献进行讨论。结果瘤细胞主要聚集于小血管和毛细血管腔内,部分可位于中等血管... 详细信息

目的探讨鼻咽部血管内大B细胞淋巴瘤(IVL)的临床病理特点及鉴别诊断。方法对1例鼻咽部血管内大B细胞淋巴瘤的临床病理学特点及免疫表型进行分析,并结合相关文献进行讨论。结果瘤细胞主要聚集于小血管和毛细血管腔内,部分可位于中等血管内。这些血管内的淋巴样细胞,体积增大,不规则,泡状核,核仁明显,核分裂象常见。免疫组化显示肿瘤细胞CD20、CD79a、LCA(+),Ki-67增殖指数很高。结论血管内大B细胞淋巴瘤是弥漫性大B细胞淋巴瘤的一种非常罕见的亚型,其临床表现无特征性,明确诊断主要依靠活检标本的病理组织学特征和免疫表型及尸检。

关键词：血管内大B细胞淋巴瘤临床病理学免疫组化鉴别诊断

Insertion of Supramolecular Segments into Covalently Crosslinked Polyurethane Networks towards the Fabrication of Recyclable Elastomers

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Chinese Journal of Polymer Science 2022年第3期40卷 321-330,I0009页

作者： Lu-ping Wang Ming-Guang zhang jing-Cheng Hao Xu Wang National Engineering Research Center for Colloidal Materials School of Chemistry and Chemical EngineeringShandong UniversityJinan 250100China Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education School of Chemistry and Chemical EngineeringShandong UniversityJinan 250100China

Thermoset plastics have become one of the most important chemical products in the world. The consequent problem is that although the thermosets possess excellent performance in mechanical strength, they cannot be reprocessed because of the internal permanent network structures. Optimizing the molecular design of thermosets is one of the most feasible ways to improve their recyclability. Here we present a facile and robust strategy to engineer the reprocessability of thermoset polyurethanes without compromising their mechanical toughness and chemical resistance via adding supramolecular additives during the polymer synthesis process. By using a multiple hydrogen bonding moiety as the model supramolecular additive, we demonstrate that the mechanical properties, recyclability, and chemical resistance of the crosslinked polyurethanes can be precisely controlled by adjusting the contents of the supramolecular additive. Systematic studies on the relations between molecular design and material properties are performed, and the optimized polyurethane network with a moderate amount of the supramolecular additive achieves the right balance between the robustness and recyclability. This work provides a cost-effective and practical way to chemically engineer thermoset plastics, aiming to enable the recycling of mechanically tough and chemically stable polymer materials.

关键词： Thermoset plastics Recyclability Polyurethane Supramolecular additives Chemical resistance

基于Alt-Geohash编码的k-匿名位置隐私保护方案

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计算机应用研究 2025年第1期42卷 276-281页

作者：李晶刘苛张磊佳木斯大学信息电子技术学院黑龙江佳木斯154007 佳木斯大学黑龙江省自主智能与信息处理重点实验室黑龙江佳木斯154007 佳木斯大学佳木斯市卫星导航技术与装备工程技术重点实验室黑龙江佳木斯154007

在对享受基于位置服务(LBS)用户进行位置隐私保护时,传统k-匿名技术在执行匿名操作时没有全面考虑时间开销和位置背景信息。针对上述问题,提出了一种基于Alt-Geohash编码的k-匿名位置隐私保护方案(k-anonymous location privacy protect... 详细信息

在对享受基于位置服务(LBS)用户进行位置隐私保护时,传统k-匿名技术在执行匿名操作时没有全面考虑时间开销和位置背景信息。针对上述问题,提出了一种基于Alt-Geohash编码的k-匿名位置隐私保护方案(k-anonymous location privacy protection scheme based on Alt-Geohash coding,KLPPS-AGC)。首先,通过位置泛化和Alt-Geohash编码技术实现对历史数据的快速检索;其次,根据历史查询概率筛选出能与用户构建高位置熵的位置;再次,利用海伦公式改善匿名集的位置分散度;最后,构建安全匿名集实现对用户的位置隐私保护。实验证明,该方案拥有较低的时间开销和较高的隐私性。

关键词：基于位置服务隐私保护位置隐私 k-匿名 Geohash

A method of ICI cancellation for OFDM with delay diversity

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Frontiers of Electrical and Electronic Engineering in China 2011年第4期6卷 521-527页

作者： jing TANG ping zhang School of Electronic Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China School of Information and Communication Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China

In orthogonal frequency division multiplexing(OFDM)system,the time variation of a wireless channel destroys orthogonality among the sub-carriers,and this induces inter-carriers interference(ICI)and degrades system performance severely in mobile *** this paper,a new method of ICI cancellation based on delay diversity(DD)was proposed,which provides a way to mitigate the negative effect from the time variation of the wireless paths,thus improve the system performance *** new method was called time-domain selfinterference cancellation(TDSIC)algorithm,which is different from other existing methods,such as frequencydomain *** a cyclically extended OFDM system,the fading characteristics of extended OFDM symbols with different cyclic delay are different with each other,so in our TDSIC method,a new diversity collection scheme at the receiver end is proposed,which can be used to improve the system performance by suppressing ICI through selecting appropriate ***,the cyclically extended OFDM symbol at the transmitter side and diversity collection with different delay added OFDM symbols at the receiver side are used in the TDSIC method with the tradeoff of time-expense,so the well-known fixed delay for symbol at the transmitter side may be detected by the receiver side through estimating several parameters of wireless *** summary,the key of the TDSIC method is to improve the system performance with the cost of *** on performance analysis,simulation has proved that TDSIC may effectively improve the performance of the time-variant wireless channel.

关键词： inter-carriers interference(ICI) delay diversity(DD) cyclic extended delay added

Mn incorporated RuO_(2) nanocrystals as an efficient and stable bifunctional electrocatalyst for oxygen evolution reaction and hydrogen evolution reaction in acid and alkaline

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Chinese Chemical Letters 2024年第10期35卷 194-200页

作者： jing Cao Dezheng zhang Bianqing Ren ping Song Weilin Xu State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Science and Technology of China Hefei 230026China

The development of efficient and stable bifunctional overall water-splitting is a crucial goal for clean and renewable energy,which is a challenging ***,we report an Mn-incorporated RuO_(2)(MnRuO_(2))catalyst for highly efficient electrocatalytic oxygen evolution reaction(OER)and hydrogen evolution reaction(HER)in acid and alkaline *** from a more electrochemical active area with the incorporation of Mn,the Mn-RuO_(2)required an overpotential of 200 mV to attain a current density of 10 mA/cm^(2)for OER in *** result indicates that the doping of Mn into RuO_(2)can enhance the OER *** acidic overall water-splitting electrolyzer with good stability constructed by bifunctional Mn-RuO_(2)only requires a cell voltage of 1.50 V to afford 10 m A/cm^(2)and can operate stably for 50 h at50 mA/cm^(2),which is better than the state-of-the-art Ru-based ***,the Mn-Ru O_(2)exhibits excellent HER and OER activity in alkaline media,and it shows superior activity and durability for overall water-splitting,only needing a cell voltage of 1.49 V to attain 10 m A/cm^(2).The present work provides an efficient approach to designing and constructing efficient Ru-based electrocatalysts for overall water-splitting.

关键词： RuO_(2)-based solid solution electrocatalysts Oxygenevolution reaction Hydrogen evolution reaction Overall watersplitting Acid andalkaline

Differences between total amount of heavy metals and their occurrence form contents in the wastelands of a molybdenum mine area

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International Journal of Coal Science & Technology 2023年第2期10卷 210-217页

作者： ping Shi jing Huang Zecan Wu Aoshuang Chen Guangxin zhang College of Jangho Architecture Northeastern University(Shenyang)Liaoning 110169China Ecological Environment Bureau of Benxi Manchu Autonomous County(Benxi) Liaoning 117100China

In a single sample plot,the total amount of heavy metals in the soil could not necessarily reflect the contents of their effective *** must be considered when attempting to determine the degree of soil heavy-metal pollution in an *** the present study,the soil around the molybdenum mining area in Huludao,China,was surveyed and sampled to evaluate soil heavy-metal pollution using the Nemerow multifactor pollution index *** Tessier continuous extraction method was used to analyze the distribution of heavy-metal forms'and their content changes in the soil of this ***,the bioactivity of heavy metals in the soil,the absorption of heavy metals by plants,and the distribution of heavy metals in plants were explored to provide data supporting the use of phytoremediation technology to treat the heavy-metal pollution in the molybdenum mining area and develop ecological restoration strategies for the area's *** pollution index results indicate that heavy-metal pollution in the soil around the tailings pond is severe,mainly due to Pb and Zn heavy ***-metal pollution in the surrounding land is mainly due to Cd and *** analysis of the heavy-metal forms/states in soils shows that exchangeable forms,which are most effective and toxic to plants,of the following metals are highest in the following areas:Cd,Cu,and Zn in the mountains around the stope;Zn,Mo,and Cu in the cultivated land around the dump;and Cd,Zn,and Mo in the cultivated land around the tailings *** pollution index analysis provides a basic overview of soil heavy-metal pollution across the entire mining ***,content analysis of heavy-metal forms/states better reflects the relationship between the availability of heavy metals in the soil and the effectiveness of ***,the latter analysis can help ensure that phytoremediation strategies are adequately targeted,science-based,and effective.

关键词： Molybdenum mining Wasteland Soil pollution Heavy metal Bioavailability Phytoremediation