A Fault-Tolerant Mobility-Aware Caching Method in Edge Computing

Mobile Edge Computing(MEC)is a technology designed for the on-demand provisioning of computing and storage services,strategically positioned close to users.In the MEC environment,frequently accessed content can be deployed and cached on edge servers to optimize the efficiency of content delivery,ultimately enhancing the quality of the user experience.However,due to the typical placement of edge devices and nodes at the network’s periphery,these components may face various potential fault tolerance challenges,including network instability,device failures,and resource constraints.Considering the dynamic nature ofMEC,making high-quality content caching decisions for real-time mobile applications,especially those sensitive to latency,by effectively utilizing mobility information,continues to be a significant challenge.In response to this challenge,this paper introduces FT-MAACC,a mobility-aware caching solution grounded in multi-agent deep reinforcement learning and equipped with fault tolerance mechanisms.This approach comprehensively integrates content adaptivity algorithms to evaluate the priority of highly user-adaptive cached content.Furthermore,it relies on collaborative caching strategies based onmulti-agent deep reinforcement learningmodels and establishes a fault-tolerancemodel to ensure the system’s reliability,availability,and persistence.Empirical results unequivocally demonstrate that FTMAACC outperforms its peer methods in cache hit rates and transmission latency.

Multidimensional evaluation of salt tolerance in groundnut genotypes through biochemical responses

The manuscript explores the complex interplay between groundnut genotypes,salt tolerance and hormonal influence,shedding light on the dynamic responses of three specific groundnut genotypes,KDG-128,TG-37 A and GG-20,to salt treatments and gibberellic acid(GA3).The study encompasses germination,plant growth,total protein content and oil content as key parameters.Through comprehensive analysis,it identifies TG-37 A and KDG-128 as salt-tolerant genotypes,and GG-20 as salt-susceptible genotypes,which highlighting the potential for targeted breeding efforts to develop more resilient groundnut varieties.Moreover,the quantification of protein and oil content under different treatments provides vital data for optimizing nutritional profiles in groundnut cultivars.Principal Component Analysis(PCA) underscores the significance of the first principal component(PC1)in explaining the majority of variance,capturing primary trends and differences in plant length.Analysis of Variance(ANOVA) and hierarchical analysis confirm the presence of statistically significant differences in protein and oil content among the genotypes.Pearson's correlation coefficient matrix analysis reveals strong positive correlations between plant length and protein content,plant length and oil content,and a moderately positive correlation between protein content and oil content.These findings provide valuable insights into groundnut physiology,salt tolerance,and nutritional composition,with implications for future research in sustainable agriculture and crop improvement.

Winter Wheat Salt Tolerance Appraisal Indices with Varied Mineral Content of Saline Water

[Objective] The aim was to study wheat salt resistance appraisal indicators under the condition of saline water irrigation.[Method] A trial was conducted with five varieties irrigated with saline water at 1,2,4,6,and 8 g/L during 2009-2010 and 2010-2011 in the research station of Dry-land Farming Institute of Hebei Academy of Agricultural and Forestry Sciences.With standardized indicators for measuring treatment,the response relations among different salt stress levels and winter wheat growth index were analyzed in this study.[Result] Under the condition of different salinity of irrigation,relative plant height after jointing stage,relative leaf area index,relative dry matter weight,relative ear number per unit area showed significant differences among treatments and yield showed significant correlation,which can be taken as salt-resistance examination index of wheat.[Conclusion] The results showed that the relative height after jointing stage was recommended as the most practical salt-tolerance appraisal indices,because it was easy to be observed and sensitive to salt stress.

Mapping of QTLs for Leaf Malondialdehyde Content Associated with Stress Tolerance in Rice

Malondialdehyde （MDA） is the final product of lipid peroxidation, and MDA content can reflect the stress tolerance of plants. To map QTLs conditioning the MDA content in rice leaves, a recombinant inbred line （RIL） population with 247 lines derived from an indica-indica cross Zhenshan 97BxMilyang 46, and a linkage map consisting of 207 DNA markers were used. The RIL population showed a transgressive segregation in the MDA content of rice leaves. Two QTLs for the MDA content in rice leaves were detected in the intervals RG532-RG811 and RG381-RG236 on chromosome 1, with the additive effects from maternal and paternal parents, accounting for 4.33% and 4.62% of phenotype variations, respectively.

Effect of Nitrogen on Water Content, Sap Flow, and Tolerance of Rice Plants to Brown Planthopper, Nilaparvata lugens

Water content (WC) and sap flow from leaf sheath of rice plants with varying nitrogen levels at different growth stages, and fluctuations in relative water content (RWC) of rice plants being damaged by brown planthoppcr (BPH), Nilaparvata lugens were determined in the laboratory, and the tolerance of rice plants to BPH at different nitrogen regimes was evaluated in the greenhouse at International Rice Research Institute (IRRI), the Philippines. The results indicated that both WC and RWC were increased significantly, as the amount of sap flow from rice plants was reduced statistically, with the increase of nitrogen content in rice plants. RWC in rice plants applied with high nitrogen fertilizer decreased drastically by the injury of BPH nymphs, while the reduced survival duration of rice plants with the increase of nitrogen content was recorded. These may be considered to be one of the important factors in increasing the susceptibility to BPH damage on rice plants applied with nitrogen fertilizer.

A Location-Based Content Search Approach in Hybrid Delay Tolerant Networks

In Delay Tolerant Networks （DTNs）, the offiine users can, through the encountering nodes, use the specific peer-to-peer message routing approach to deliver messages to the destination. Thus, it solves the problem that users have the demands to deliver messages while they are temporarily not able to connect to the Internet. Therefore, by the characteristics of DTNs, people who are not online can still query some location based information, with the help of users using the same service in the nearby area. In this paper, we proposed a location-based content search approach. Based on the concept of three-tier area and hybrid node types, we presented four strategies to solve the query problem, namely, Data Replication, Query Replication, Data Reply, and Data Synchronization strategies. Especially we proposed a Message Queue Selection algorithm for message transferring. The priority concept is set associated with every message such that the most ＂important＂ one could be sent first. In this way, it can increase the query success ratio and reduce the query delay time. Finally, we evaluated our approach, and compared with other routing schemes. The simulation results showed that our proposed approach had better query efficiency and shorter delay.

Low Ca^2＋ Content and Ca^2＋/Na^＋ Ratio in Leaf Tissues Determine Salinity Tolerance in Spanish Type Groundnut （Arachis hypogeal L.）

The study was performed with seven groundnut varieties/genotypes and F1s derived from crossing in all possible combinations without reciprocal among the mentioned varieties/genotypes. The objective was to assess whether low Ca2＋ content and Ca2＋/Na＋ ratio of leaf tissue or stem tissue determine salinity tolerance in terms of economic yield （kernel yield） in groundnut. It revealed that the varieties, “Binachinabadam-6”, “Binachinabadam-5” and the F1 G2 × G3 were most tolerant based on kernel yield under 8 dS/m and 10 dS/m salinity stresses. These two tolerant varieties and the F1 also showed lower Ca2＋ and Ca2＋/Na＋ ratios in leaf tissue, which indicated lower Ca2＋ and Ca2＋/Na＋ ratio of leaf tissue determined salinity tolerance in terms of kernel yield in Spanish type groundnut. These findings could be applied in future plant breeding applications for screening salt tolerant Spanish type groundnut genotypes.

Soil water content and nitrogen differentially correlate with multidimensional leaf traits of two temperate broadleaf species

The variation and correlation of leaf economics and vein traits are crucial for predicting plant ecological strategies under different environmental changes.However,correlations between these two suites of traits and abiotic factors such as soil water and nitrogen content remain ambiguous.We measured leaf economics and vein traits as well as soil water and nitrogen content for two different shade-tolerant species(Betula platyphylla and Acer mono)in four mixed broadleaved-Korean pine(Pinus koraiensis)forests along a latitudinal gradient in Northeast China.We found that leaf economics traits and vein traits were decoupled in shade-intolerant species,Betula platphylla,but significantly coupled in a shadetolerant species,A.mono.We found stronger correlations among leaf traits in the shade tolerant species than in the shade intolerant species.Furthermore,leaf economic traits were positively correlated with the soil water gradient for both species,whereas vein traits were positively correlated with soil water gradient for the shade intolerant species but negatively correlated in the shade tolerant species.Although economic traits were positively correlated with soil nitrogen gradient in shade intolerant species but not correlated in shade tolerant species,vein traits were negatively correlated with soil nitrogen gradient in shade tolerant species but not correlated in shade intolerant species.Our study provides evidence for distinct correlations between leaf economics and vein traits and local abiotic factors of species differing in light demands.We recommend that the ecological significance of shade tolerance be considered for species when evaluating ecosystem functions and predicting plant responses to environmental changes.

Content-Based Image Retrieval：Near Tolerance Rough Set Approach

The problem considered in this paper is how to detect the degree of similarity in the content of digital images useful in image retrieval,i.e.,to what extent is the content of a query image similar to content of other images.The solution to this problem results from the detection of subsets that are rough sets contained in covers of digital images determined by perceptual tolerance relations(PTRs).Such relations are defined within the context of perceptual representative spaces that hearken back to work by J.H.Poincare on representative spaces as models of physical continua.Classes determined by a PTR provide content useful in content-based image retrieval(CBIR).In addition,tolerance classes provide a means of determining when subsets of image covers are tolerance rough sets(TRSs).It is the nearness of TRSs present in image tolerance spaces that provide a promising approach to CBIR,especially in cases such as satellite images or aircraft identification where there are subtle differences between pairs of digital images,making it difficult to quantify the similarities between such images.The contribution of this article is the introduction of the nearness of tolerance rough sets as an effective means of measuring digital image similarities and,as a significant consequence,successfully carrying out CBIR.

外源绿原酸对番茄幼苗低温耐性的生理调控效应

【目的】番茄苗期常遭遇低温冷害,严重影响花果正常发育。酚酸物质绿原酸是农作物抗逆响应的关键代谢物质,但外源绿原酸是否能增强作物耐冷性尚不明确。因此,以低温耐性不同的两个番茄品种为材料,研究外源根施绿原酸对番茄低温耐性的调控效应及可能机制。【方法】以番茄(Solunum lycopersacum)强耐低温品种京番401(JF401)和弱耐低温品种京番101(JF101)为试验材料开展室内盆栽试验。基于前期试验获得的参数,设置6个绿原酸(CGA)根施浓度处理:0、0.005、0.025、0.05、0.1和0.25 g/L。根施CGA后,番茄幼苗在正常温度下生长5周,然后在低温(昼夜温15℃/5℃)胁迫下生长6天。在低温胁迫结束后2天,用手持式叶绿素荧光仪测定完全展开叶片初始荧光产量(Fo)、最大荧光产量(Fm),光化学猝灭系数(Qp)、非光化学猝灭系数(NPQ)及PSII实际光化学效率(ФPSII);调查番茄幼苗地上部鲜重(SFW)、根系鲜重(RFW)和总鲜重(TFW);测定完全展开叶片相对电导率(REC)、叶绿体色素含量(Chl.a、Chl.b、Car)、自由水含量(LFW)和束缚水含量(LBW);测定叶片中超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)、过氧化氢(H_(2)O_(2))和丙二醛(MDA)含量。【结果】在供试CGA浓度范围内,JF401和JF101番茄幼苗的耐冷性均随CGA浓度的升高先增加后降低,最高耐冷性综合评价指标D值分别出现在0.1和0.05 g/L。Pearson相关分析表明,D值与Fv/Fm、Qp、ФPSII、Chl.a、Chl.(a+b)、SFW、RFW、TFW、SOD、POD、CAT和LBW显著正相关(R=0.72~0.98),与H_(2)O_(2)、NPQ、REC、MDA和LFW显著负相关(R=0.63~0.98)。PCA主成分分析表明,SFW、Chl.b、Chl.(a+b)、Qp、ФPSII和LBW是影响两品种番茄苗期低温耐性的共性关键指标。在CGA最佳浓度下,京番101幼苗的ФPSII、Chl.(a+b)、LBW和SFW较CK的增幅分别为157.7%、35.5%、8.4%和24%,京番401幼苗的增幅分别为223.5%、64.9%、31.2%和62%。【结论】低温胁迫下,根施适量绿原酸可通过改善光能吸收及利用、降低水分生理代谢、增强酶促抗氧化防御和清除活性氧等多途径调控机制,显著提升番茄幼苗低温耐性。

6个橡胶树新品种在德宏州的区域性试验研究

为筛选出适宜德宏植胶区的橡胶树新品种,引进了热研879、热垦628、热研73397、IAN873、热垦525、湛试32713这6个橡胶树新品种,在瑞丽市进行生产性试种,并对引进品种的茎围、产量、干胶含量、死皮率、抗寒性等指标进行了评价。结果表明:(1)开割前热垦628、热研73397、IAN873的茎围增粗表现较好,第8年达开割标准;开割后湛试32713,热垦628、热研73397和热垦525的茎围平均净增粗较高、速生特性好。(2)平均株次干胶产量表现为热研879极显著高于对照,热垦628显著高于对照;单位面积干胶产量以热垦628与热研879较高,均与对照之间差异极显著;热垦628的平均干胶含量较低,显著低于对照,其他品种与对照之间差异不显著。(3)死皮率表现为热垦628>湛试32713>IAN873>热研879>热研525>云研77-4(CK)>热研73397,4、5级死皮率表现为热垦525>热垦628>热研73397>IAN873>热研879>湛试32713>云研77-4(CK)。(4)热垦628和湛试32713的抗寒性表现较好,IAN873、热研879和热垦525的抗寒性表现较差。鉴于6个橡胶品种在德宏州种植的综合表现,立地环境较好林段可优先选择种植高产品种热研879,以往有轻微寒害发生的林段可选择高产抗寒品种热垦628。

Effects of Sodium Chloride Stress on Growth of Sweet Potato Plantlets in vitro and Ion Content

[Objective] This study aimed to investigate the salt-tolerance mechanism of sweet potato.[Method]Two sweet potato varieties of Xu 25-2(salt-tolerant cultivar)and Triumph 100(salt-sensitive cultivar)were treated by sodium chloride with the concentration of 0 mmol/L and 100 mmol/L.After 20 days,Na+ content and Na+/K+ ratio in the roots,shoots and leave were determined by the flame photometer,while dry weight and fresh weight of roots,shoots and leave in different varieties were also studied.[Result]The growth of two sweet potato varieties was inhibited under salt stress,so the plant became shorter,leaf and root became fewer,dry weight of roots and leave decreased,but seedlings of Xu 25-2 were inhibited slightly.Furthermore,Na+ content and Na+/K+ ratio in roots,shoots and leaves of two sweet potato varieties increased.Na+ content of salt-tolerant Xu 25-2 was low in roots,shoots and leaves,while Na+ content of salt-sensitive Triumph 100 was high in shoots and leave of seedlings,but the change range of Xu 25-2 was less than that of Triumph 100.[Conclusion]The lower Na+ content and Na+/K+ ratio in leaves under salt stress were the most important characteristics for salt-tolerance of sweet potato varieties.

不同油酸含量花生品种全生育期耐旱性鉴定指标筛选和综合评价

干旱是限制我国花生产量和品质的关键环境因素之一。为探究不同油酸含量花生对干旱胁迫的反应,筛选抗旱优质花生品种,以18个普通品种和18个高油酸品种为试材,设置全生育期正常灌水和中度干旱胁迫2个处理,通过测定花生产量及其构成因素和籽粒品质指标,并结合多元统计学分析方法,对不同类型花生种质的全生育期耐旱性进行了综合评价。结果表明:全生育期干旱胁迫下,各品种的产量及其构成因素和可溶性糖含量显著降低,高油酸花生籽粒粗脂肪含量、油酸含量和油亚比显著降低,亚油酸含量显著升高,而普通花生籽粒品质并没有发生显著变化。结合逐步回归分析建立的全生育期耐旱性综合评价数学模型和灰色关联度分析结果发现,全生育期中度干旱条件下,单株产量、百果重、单株荚果数、饱果率和可溶性糖含量可作为普通花生耐旱性鉴定的指标,单株产量、百仁重、油亚比、饱果率和单株荚果数可作为高油酸花生耐旱性鉴定的指标。基于各指标抗旱系数的主成分分析、综合隶属函数和聚类分析结果,最终筛选出普通耐旱品种HY25,普通旱敏感品种FH18;高油酸耐旱品种JH16、KN71、HY665和KN1715;高油酸旱敏感品种HY52和HY951。

大麦幼苗的 Na^+Cl^-胁迫和叶片耐 Cl^-量

耐盐性不同的两个大麦品种在渗透势相同的 NaCl,Na^+或Cl^-胁迫下,根系的 Na^+/Cl^-均大于叶片的对应值,叶片 Na^+与根系 Na^+含量之比均小于1,而 Cl^-含量之比均大于1。Na^+胁迫伤害大于 Cl^-胁迫伤害。在 Cl^-胁迫下,大麦幼苗干物质积累量较大,根系质膜和液泡膜微囊 H^+-ATPase 活性较高,叶片电解质渗出率较低。叶片致死 Cl^-含量约为每克干重4.2～4.8 mmol。在不同浓度的 NaCl 胁迫下,两品种根系的 Cl^-含量均约占整株 Cl^-含量的20%,但滩引2号根系和地上部的 Cl^-含量都低于科品7号,其主要原因是滩引2号单株 Cl^-的吸收量较低。

18种城市园林树种光合耐脱水能力及抗旱性综合评价

随着未来全球气候变化导致的温度上升和蒸气压亏缺增加,筛选耐旱性强的城市园林树种对城市绿化具有十分重要的意义。本研究比较18种城市园林树种的叶光合耐脱水能力(脱水曲线上PSⅡ潜在量子效率开始下降时对应的相对含水量,RWC_(crit))的差异及与叶形态(叶面积、比叶质量、叶干物质含量、叶厚度和叶密度)、解剖结构(气孔密度、气孔长、气孔指数及上表皮、下表皮、栅栏组织、海绵组织、维管束鞘厚度及占横截面面积的比例)的关系和18种园林树种的抗旱能力。结果表明,18种树种的RWC_(crit)在30.2%~58.0%,平均值为44.7%,18种树种的光合耐脱水能力RWC_(crit)与叶面积呈显著正相关,与叶横截面下表皮面积所占比例呈显著负相关,18种园林树种的RWC_(crit)与其综合抗旱能力变化趋势一致。研究结果表明,RWC_(crit)可以作为耐旱性指标预测园林树种的耐旱性,对未来城市耐旱树种筛选和合理经营有一定价值。

基于容忍泄露的内容关联短签名方案

容忍泄露是指为了增强签名方案的鲁棒性,允许方案泄露部分秘密信息,适用于设备和通讯线路均没法完美保护的大部分场合.短签名长度一般只有普通签名一半的签名长度,可以大大降低窄带实时交互的系统的通讯数据量.提出了一种待签名信息关联签名密钥的短签名方案,该方案具有容忍部分泄露的特性,对方案的效率和安全性进行了分析,证明了方案在容忍泄露预言机下是安全的,实验结果表明该方案具有较好的性能,适用于传输带宽受限的应用场合.

高含油抗病耐寒油菜新品种浙农油12的选育

浙农油12是一个高含油、抗菌核病和病毒病、耐寒性好的油菜新品种,由浙江勿忘农种业股份有限公司自主选育,并于2023年通过非主要农作物品种登记,登记编号:GPD油菜(2023)330235,适宜在长江下游浙江、江苏、安徽、上海冬油菜区秋冬季节种植。该品种以具有适性广、品质高的3个油菜品种为基础材料,通过杂交组合测配和世代材料分离,以聚合抗主要病害、耐低温冻害、高含油量等优势农艺和品质性状为定向选择目标,通过系谱法多年选育而成。该品种多点适应性试验平均产量2 813.5 kg·hm^(-2),比对照增产2.7%;含油量49.71%,硫苷含量21.48μmol·g^(-1),无芥酸。

Impact of Nitrogen, Phosphorus and Potassium on Brown Planthopper and Tolerance of Its Host Rice Plants

The brown planthopper(BPH),Nilaparvata lugens(St?l),appeared as a devastating pest of rice in Asia. Experiments were conducted to study the effects of three nutrients,nitrogen(N),phosphorus(P) and potassium(K),on BPH and its host rice plants. Biochemical constituents of BPH and rice plants with varying nutrient levels at different growth stages,and changes in relative water content(RWC) of rice plants were determined in the laboratory. Feeding of BPH and the tolerance of rice plants to BPH with different nutrient levels were determined in the nethouse. Concentrations of N and P were found much higher in the BPH body than in its host rice plants,and this elemental mismatch is an inherent constraint on meeting nutritional requirements of BPH. Nitrogen was found as a more limiting element for BPH than other nutrients in rice plants. Application of N fertilizers to the rice plants increased the N concentrations both in rice plants and BPH while application of P and K fertilizers increased their concentrations in plant tissues only but not in BPH. Nitrogen application also increased the level of soluble proteins and decreased silicon content in rice plants,which resulted in increased feeding of BPH with sharp reduction of RWC in rice plants ultimately caused susceptible to the pest. P fertilization increased the concentration of P in rice plant tissues but not changed N,K,Si,free sugar and soluble protein contents,which indicated little importance of P to the feeding of BPH and tolerance of plant against BPH. K fertilization increased K content but reduced N,Si,free sugar and soluble protein contents in the plant tissues which resulted in the minimum reduction of RWC in rice plants after BPH feeding,thereby contributed to higher tolerance of rice plants to brown planthopper.

Over-Expression of ICE1 Gene in Transgenic Rice Improves Cold Tolerance

ICE1, an Arabidopsis thaliana transcription factor gene, was cloned by RT-PCR and successfully transformed into rice variety Kenjiandao 10 by the Agrobacterium-mediated transformation method. PCR amplification and Southern blot analysis indicated that ICE1 had been integrated into rice genome. Compared with the non-transgenic plants, the transgenic plants exhibited high resistance to hygromycin B and were consistent with the Mendelian inheritance of a single copy of the transgenic ICE1. Under the low temperature stress, the transgenic plants showed the lower mortality rate and the increased proline content. These results suggest that the Arabidopsis ICE1 is functional in rice and the over-expression of ICE1 improves the tolerance to cold stress in rice.