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人工草地种植策略下的草原生态变化仿真

计算机技术与发展 2024年第2期34卷 201-206页

作者：潘理虎刘卉闫慧敏王博宇太原科技大学计算机科学与技术学院山西太原030024 中国科学院地理科学与资源研究所北京100101

人工草地种植是实现草地生态环境保护和牧户生活质量改善的重要途径,也是草业生产和环境治理中的重要内容之一。为了研究人工草地种植是否能达到预期的生态调节效果,该文以锡林郭勒草原的镶黄旗作为研究区域构建APG-ABM模型,模拟了五种... 详细信息

人工草地种植是实现草地生态环境保护和牧户生活质量改善的重要途径,也是草业生产和环境治理中的重要内容之一。为了研究人工草地种植是否能达到预期的生态调节效果,该文以锡林郭勒草原的镶黄旗作为研究区域构建APG-ABM模型,模拟了五种情景下未来30年的草地发展状况,分析了牧民收入以及生态压力等指标的变化趋势。实验结果表明,未种植人工草地的情况下,牧民分别以经济效益或生态效益优先时,牧民人均收入分别在35 000元及20 000元左右,前者压力指数在[0.8,1]区间内,后者压力指数稳定在0.5以下。种植人工草地后,牧民人均收入分别达到70 000元及55 000元左右,压力指数前者在[0.7,0.9]内波动,后者稳定在0.2左右。将50%的草地资源保护后,牧民人均收入处于45 000~50 000元,生态压力处于0.5以下的正常水平。因此,人工草地的广泛种植能够使生态压力得到明显缓解,并且牧民人均收入显著提高,有利于加强中国草地生态建设。

关键词：人工草地生态压力基于代理的建模与仿真草畜平衡经济生态协调

Octopaminergic neurons function in appetitive but not aversive olfactory learning and memory in Bactrocera dorsalis

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Insect Science 2022年第6期29卷 1747-1760页

作者： Jin-Xin Yu Qian Xiang Jia-Bao Qu yan-min hui Tao Lin Xin-Nian Zeng Jia-Li Liu Guangdong Engineering Research Center for Insect Behavior Regulation College of Plant ProtectionSouth China Agricultural UniversityGuangzhouGuangdongChina College of Life Sciences Department of Biological ScienceShangrao Normal UniversityShangraoJiangxiChina

The biogenic amine octopamine(OA,invertebrate counterpart of nora-drenaline)plays critical roles in the regulation of olfactory ***,OA has been thought to mediate appetitive but not aversive learning in honeybees,fruit flies(Drosophila),and ***,this viewpoint has recently been challenged because OA activity through aβ-adrenergic-like receptor drives both appetitive and aversive ***,we explored the roles of OA neurons in olfactory learning and memory retrieval in Bactrocera *** trained flies to associate an orange odor with a sucrose reward or to associate methyl eugenol,a male lure,with N,N-diethyl-3-methyl benzoyl amide(DEET)*** then treated flies with OA receptor antagonists before appetitive or aversive conditioning and a memory retention *** of OA receptor antagonist mianserin or epinastine into the abdomen of flies led to impaired of appetitive learning and memory retention with a sucrose reward,while aversive learning and memory reten-tion with DEET punishment remained *** results suggest that the OA signaling participates in appetitive but not aversive learning and memory retrieval in *** through OA receptors.

关键词： appetitive aversive Bactrocera dorsalis learning and memory octopamine

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天津某水库含嗅味物质原水应急处理方式研究

海河水利 2024年第6期 91-97页

作者：闫慧敏韩正双白雪娟陈静梅天津市公用事业设计研究所天津300100

以天津某水库含嗅味物质原水为研究对象,利用小试研究了以传统混凝沉淀过滤为主体工艺的3座净水厂采用该水源进行应急供水的适宜处理方式。试验结果表明,粉末炭对原水中2-MIB和土臭素均具有较好吸附作用,其吸附效果主要受粉末炭投量和... 详细信息

以天津某水库含嗅味物质原水为研究对象,利用小试研究了以传统混凝沉淀过滤为主体工艺的3座净水厂采用该水源进行应急供水的适宜处理方式。试验结果表明,粉末炭对原水中2-MIB和土臭素均具有较好吸附作用,其吸附效果主要受粉末炭投量和吸附时间影响,增加粉末炭投量和吸附时间可以提高二者去除率,根据去除率推算30 mg/L粉末炭吸附50 min最多可去除60 ng/L溶解态2-MIB和230 ng/L溶解态土臭素,吸附180 min最多可去除120 ng/L溶解态2-MIB和480 ng/L溶解态土臭素,2-MIB去除难度要高于土臭素;传统混凝沉淀过滤工艺可以去除大部分结合态嗅味物质,3座水厂采用厂内投加粉末炭后进行混凝沉淀过滤相对于直接混凝沉淀过滤而言,可以提高对2-MIB和土臭素的去除效果,但其效果提升主要受限于吸附时间,可应对的嗅味物质浓度较低;采用水库出口处投加粉末炭,可以增加吸附时间,明显提高2-MIB和土臭素的去除效果,该方式最终能处理的溶解态嗅味物质浓度基本与粉末炭吸附推算的浓度一致,满足安全供水需求。

关键词： 2-MIB 土臭素应急处理粉末炭投量吸附时间混凝沉淀

Formation characteristics of long-term memory in Bactrocera dorsalis

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Insect Science 2023年第3期30卷 829-843页

作者： Jin-Xin Yu yan-min hui Jun-Ao Xue Jia-Bao Qu Si-Quan Ling Wei Wang Xin-Nian Zeng Jia-Li Liu Guangdong Engineering Research Center for Insect Behavior Regulation College of Plant ProtectionSouth China Agricultural UniversityGuangzhouChina Guangdong Provincial Key Laboratory of Silviculture Protectionand UtilizationGuangdong Academyof ForestryGuangzhouChina

Studies on insects have contributed significantly to a better understanding of learning and memory,which is a necessary cognitive capability for all *** the formation of memory has been studied in some model insects,more evidence is required to clarify the characteristics of memory formation,especially long-term memory(LTM),which is important for reliably storing ***,we explored this question by examining Bactrocera dorsalis,an agricultural pest with excellent learning *** the classical conditioning paradigm of the olfactory proboscis extension reflex(PER),we found that paired conditioning with multiple trials(>3)spaced with an intertrial interval(≥10 min)resulted in stable memory that lasted for at least 3 ***,even a single conditioning trial was sufficient for the formation of a 2-d *** the injection of protein inhibitors,protein-synthesis-dependent memory was confirmed to start 4 h after training,and its dependence on translation and transcription ***,the results revealed that the dependence of memory on protein translation exhibited a time-window effect(4-6 h).Our findings provide an integrated view of LTM in insects,suggesting common mechanisms in LTM formation that play a key role in the biological basis of memory.

关键词： Bactrocera dorsalis interval long-term memory protein synthesis trial

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旋翼无人机折叠桨桨毂随机振动疲劳分析

内燃机与配件 2024年第7期 50-52页

作者：安晓东闫慧敏施幕开王毅张泽明成都纵横大鹏无人机科技有限公司四川成都610094

旋翼无人机折叠桨桨毂是折叠桨和电机连接的重要结构,电机螺旋桨产生的随机振动是桨毂结构失效的主要原因。为了对桨毂进行振动疲劳分析,采用有限元分析软件对桨毂结构进行了模态分析和随机振动分析,结合仿真结果对桨毂结构进行优化改... 详细信息

旋翼无人机折叠桨桨毂是折叠桨和电机连接的重要结构,电机螺旋桨产生的随机振动是桨毂结构失效的主要原因。为了对桨毂进行振动疲劳分析,采用有限元分析软件对桨毂结构进行了模态分析和随机振动分析,结合仿真结果对桨毂结构进行优化改进。对改进前后的桨毂结构进行疲劳寿命计算及飞行试验,验证设计方法的可靠性。该设计方法可以推广应用到各类旋翼无人机产品中连接件的设计。

关键词：旋翼无人机折叠桨桨毂固有频率随机振动疲劳寿命

Effect of Low-temperature Imidization on Properties and Aggregation Structures of Polyimide Films with Different Rigidity

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Chinese Journal of Polymer Science 2024年第8期42卷 1134-1146页

作者： yan Jia Lei Zhai Song Mo Yi Liu Li-Xin Liu Xin-Yu Du min-hui He Lin Fan Key Laboratory of Science and Technology on High-tech Polymer Materials Institute of ChemistryChinese Academy of SciencesBeijing 100190China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China

The traditional high-temperature preparation process of polyimide can cause many problems and limits the wider application in extreme *** important challenge to be solved urgently is the reduction of imidization *** this work,twelve kinds of polyimide films with different chain rigidity were prepared at low temperature of 200℃,in the absence or presence of imidazole used as the *** molecular rigidity and free volume were theoretically calculated,and relationship between structure and properties were systematically *** results show that imidization reaction under low temperatures is significantly affected by the rigidity of molecula r *** rigid structure of polyimide is not conducive to the low-temperature imidization,but this adverse effect can be eliminated by adding catalyst,resulting the notably increased imidization *** optical and thermal properties can be improved to a certain extent for the chemically catalyzed system,resulting in relatively higher heat resistance and thermal *** the mechanical performance could be determined by com plicating factors,greatly different from polyimide films prepa red by high temperature *** investigate aggregation structures of film s,the effect of chain rigidity and catalyst on the stacking or orientation of molecular chains was further *** wo rk can contribute to the understanding of chemically catalyzed imidization that is rarely reported in the existing research,and will provide guidance for the low-temperature preparation of high-performance polyimides.

关键词： Polyimide Imidization Catalyst Structure and properties Aggregation structures

Monothetic and conductive network and mechanical stress releasing layer on micron-silicon anode enabling high-energy solid-state battery

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Rare Metals 2024年第3期43卷 1017-1029页

作者： Xiang Han min Xu Lan-hui Gu Chao-Fei Lan min-Feng Chen Jun-Jie Lu Bi-Fu Sheng Peng Wang Song-yan Chen Ji-Zhang Chen College of Materials Science and Engineering Co-Innovation Center of Efficient Processing and Utilization of Forestry ResourcesNanjing Forestry UniversityNanjing210037China Department of Physics Xiamen UniversityXiamen361005China Western Digital Corporation MilpitasCA95035USA

Silicon has ultrahigh capacity,dendrite-free alloy lithiation mechanism and low cost and has been regarded as a promising anode candidate for solid-state *** to the low infiltration of solid-state electrolyte(SSE),not the unstable solid-electrolyte interphase(SEI),but the huge stress during lithiation-and delithiation-induced particle fracture and conductivity lost tend to be the main *** this study,starting with micron-Si,a novel monothetic carbon conductive framework and a MgO coating layer are designed,which serve as electron pathway across the whole electrode and stress releasing layer,*** addition,the in situ reaction between Si and SSE helps to form a LiF-rich and mechanically stable SEI *** a result,the mechanical stability and charge transfer kinetics of the uniquely designed Si anode are significantly ***,high initial Coulombic efficiency,high capacity and durable cycling stability can be achieved by applying the Si@MgO@C anode in *** example,high specific capacity of 3224.6 mAh·g^(-1)and long cycling durability of 200 cycles are *** work provides a new concept for designing alloy-type anode that combines surface coating on particle and electrode structure design.

关键词： Lithium-ion battery(LIB) Solid-state electrolyte(SSE) Silicon anode Stress relief Coating

Efficacy and safety of Yiqi Peiyuan granules for improving the short-term prognosis of patients with acute kidney injury:A multicenter,double-blind,placebo-controlled,randomized trial

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Journal of Integrative Medicine 2024年第3期22卷 279-285页

作者： Jia-jia Wu Tian-yi Zhang Ying-hui Qi min-yan Zhu yan Fang Chao-jun Qi Li-ou Cao Ji-fang Lu Bo-han Lu Lu-min Tang Jian-xiao Shen Shan Mou Department of Nephrology Molecular Cell Lab for Kidney DiseaseShanghai Peritoneal Dialysis Research CenterUremia Diagnosis and Treatment CenterRenji Hospital Affiliated to Shanghai Jiaotong University School of MedicineShanghai 200127China Department of Nephrology Shanghai Pudong New Area Punan HospitalShanghai 200125China Department of Nephrology Ningbo Hangzhou Bay HospitalNingbo 315336Zhejiang ProvinceChina

Background:Yiqi Peiyuan(YQPY)prescription,a composite prescription of traditional Chinese medicine,has been used to prevent or delay the continued deterioration of renal function after acute kidney injury(AKI)in some institutions and has shown considerable ***:This is the first randomized controlled trial to assess efficacy and safety of YQPY for improving short-term prognosis in adult patients with ***,setting,participants and interventions:This is a prospective,double-blind,multicenter,randomized,and placebo-controlled clinical trial.A total of 144 enrolled participants were randomly allocated to two groups according to a randomization ***,caregivers and investigators assessing the outcomes were blinded to group *** in the YQPY group received 36 g YQPY granules twice a day for 28 *** in the placebo group received a placebo in the same dose as the YQPY *** outcome measures:The primary outcome was the change in the estimated glomerular filtration rate(eGFR)between baseline and after 4 and 24 weeks of *** secondary outcomes were the change of serum creatinine(Scr)level between baseline and after treatment,and the incidence of endpoint events,defined as eGFR increasing by more than 25%above baseline,eGFR>75 mL/min per1.73 m2or the composite endpoint,which was defined as the sum of patients meeting either of the above ***:Data from a total of 114 patients(59 in the YQPY group and 55 in the control group)were *** mean changes in eGFR and Scr in weeks 4 and 24 had no difference between the two *** further subgroup analysis(22 in the YQPY group and 31 in the control group),the mean change in eGFR after treatment for 4 weeks was 27.39 mL/min per 1.73 m2in the YQPY group and 5.78 mL/min per1.73 m2in the placebo group,and the mean difference between groups was 21.61 mL/min per 1.73 m2(P<0.001).Thirteen(59.1%)patients in the YQPY group and 5(16.1%)in the placebo g

关键词： Chinese herbal medicine Randomized controlled trial Acute kidney injury Renal function

Differential expression profile of circular RNAs in mouse peritoneum with peritoneal fibrosis and the potential regulatory role of novel_circ_0007527

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Genes & Diseases 2024年第3期11卷 59-62页

作者： Yingfeng Shi yan Hu hui Chen Jinqing Li min Tao Xun Zhou Qin Zhong Andong Qiu Shougang Zhuang Na Liu Department of Nephrology Shanghai East HospitalTongji University School of MedicineShanghai 200120China School of Life Science and Technology Advanced Institute of Translational MedicineTongji UniversityShanghai 200092China Department of Medicine Rhode Island Hospital and Alpert Medical SchoolBrown UniversityProvidenceRI 02912USA

CircRNAs,a novel type of endogenous non-coding RNAs(ncRNAs),are typically produced by back-splicing from exons of protein-coding genes,which are characterized by a covalently closed structure with neither 5'to 3'polarity nor a poly(A)tail.'On the one hand,circRNAs are involved in the regulation of a variety of important biological processes,such as apoptosis,proliferation,migration,and inflammatory responses.'On the other hand,the relationship between circRNAs and several fibrotic diseases has been reported.2 However.

关键词： endogenous peritoneal diseases