Frilled Lizard Optimization: A Novel Bio-Inspired Optimizer for Solving Engineering Applications

This research presents a novel nature-inspired metaheuristic algorithm called Frilled Lizard Optimization(FLO),which emulates the unique hunting behavior of frilled lizards in their natural habitat.FLO draws its inspiration from the sit-and-wait hunting strategy of these lizards.The algorithm’s core principles are meticulously detailed and mathematically structured into two distinct phases:(i)an exploration phase,which mimics the lizard’s sudden attack on its prey,and(ii)an exploitation phase,which simulates the lizard’s retreat to the treetops after feeding.To assess FLO’s efficacy in addressing optimization problems,its performance is rigorously tested on fifty-two standard benchmark functions.These functions include unimodal,high-dimensional multimodal,and fixed-dimensional multimodal functions,as well as the challenging CEC 2017 test suite.FLO’s performance is benchmarked against twelve established metaheuristic algorithms,providing a comprehensive comparative analysis.The simulation results demonstrate that FLO excels in both exploration and exploitation,effectively balancing these two critical aspects throughout the search process.This balanced approach enables FLO to outperform several competing algorithms in numerous test cases.Additionally,FLO is applied to twenty-two constrained optimization problems from the CEC 2011 test suite and four complex engineering design problems,further validating its robustness and versatility in solving real-world optimization challenges.Overall,the study highlights FLO’s superior performance and its potential as a powerful tool for tackling a wide range of optimization problems.

An Adaptive Program Recommendation System for Multi-User Sharing Environment

More and more accounts or devices are shared by multiple users in video applications,which makes it difficult to provide recommendation service.Existing recommendation schemes overlook multiuser sharing scenarios,and they cannot make effective use of the mixed information generated by multi-user when exploring users’potential interests.To solve these problems,this paper proposes an adaptive program recommendation system for multi-user sharing environment.Specifically,we first design an offline periodic identification module by building multi-user features and periodically predicting target user in future sessions,which can separate the profile of target user from mixed log records.Subsequently,an online recommendation module with adaptive timevarying exploration strategy is constructed by jointly using personal information and multi-user social information provided by identification module.On one hand,to learn the dynamic changes in user-interest,a time-varying linear upper confidence bound(LinUCB)based on personal information is designed.On the other hand,to reduce the risk of exploration,a timeinvariant LinUCB based on separated multi-user social information from one account/device is proposed to compute the quality scores of programs for each user,which is integrated into the time-varying LinUCB by cross-weighting strategy.Finally,experimental results validate the efficiency of the proposed scheme.

Concise extraction and characterization of the pore-throat network in unconventional hydrocarbon reservoirs: A new perspective

In this study,a new image-based method for the extraction and characterization of pore-throat network for unconventional hydrocarbon storage and exploitation is proposed.“Pore-throat solidity”,which is analogous to particle solidity,and a new method for automatic identification of pores and throats in tight sandstone oil reservoirs are introduced.Additionally,the“pore-throat combination”and“pure pore”are defined and distinguished by drawing the cumulative probability curve of the pore-throat solidity and by selecting an appropriate cutoff point.When the discrete grid set is recognized as a pore-throat combination,Legendre ellipse fitting and minimum Feret diameter are used.When the pore and throat grid sets are identified as pure pores,the pore diameter can be directly calculated.Using the new method,the analytical results for the physical parameters and pore radius agree well with most prior studies.The results comparing the maximum ball and the new model could also prove the accuracy of the latter's in micro and nano scales.The new model provides a more practical theoretical basis and a new calculation method for the rapid and accurate evaluation of the complex processes of oil migration.

Magnificent Frigatebird Optimization: A New Bio-Inspired Metaheuristic Approach for Solving Optimization Problems

This paper introduces a groundbreaking metaheuristic algorithm named Magnificent Frigatebird Optimization(MFO),inspired by the unique behaviors observed in magnificent frigatebirds in their natural habitats.The foundation of MFO is based on the kleptoparasitic behavior of these birds,where they steal prey from other seabirds.In this process,a magnificent frigatebird targets a food-carrying seabird,aggressively pecking at it until the seabird drops its prey.The frigatebird then swiftly dives to capture the abandoned prey before it falls into the water.The theoretical framework of MFO is thoroughly detailed and mathematically represented,mimicking the frigatebird’s kleptoparasitic behavior in two distinct phases:exploration and exploitation.During the exploration phase,the algorithm searches for new potential solutions across a broad area,akin to the frigatebird scouting for vulnerable seabirds.In the exploitation phase,the algorithm fine-tunes the solutions,similar to the frigatebird focusing on a single target to secure its meal.To evaluate MFO’s performance,the algorithm is tested on twenty-three standard benchmark functions,including unimodal,high-dimensional multimodal,and fixed-dimensional multimodal types.The results from these evaluations highlight MFO’s proficiency in balancing exploration and exploitation throughout the optimization process.Comparative studies with twelve well-known metaheuristic algo-rithms demonstrate that MFO consistently achieves superior optimization results,outperforming its competitors across various metrics.In addition,the implementation of MFO on four engineering design problems shows the effectiveness of the proposed approach in handling real-world applications,thereby validating its practical utility and robustness.

Identifying the real fracture hidden in rock microcrack zone by acoustic emission energy

Identifying the real fracture of rock hidden in acoustic emission(AE)source clusters(AE-depicted microcrack zone)remains challenging and crucial.Here we revealed the AE energy(representing dissipated energy)distribution rule in the rock microcrack zone and proposed an AE-energy-based method for identifying the real fracture.(1)A set of fracture experiments were performed on granite using wedgeloading,and the fracture process was detected and recorded by AE.The microcrack zone associated with the energy dissipation was characterized by AE sources and energy distribution,utilizing our selfdeveloped AE analysis program(RockAE).(2)The accumulated AE energy,an index representing energy dissipation,across the AE-depicted microcrack zone followed the normal distribution model(the mean and variance relate to the real fracture path and the microcrack zone width).This result implies that the nucleation and coalescence of massive cracks(i.e.,real fracture generation process)are supposed to follow a normal distribution.(3)Then,we obtained the real fracture extension path by joining the peak positions of the AE energy normal distribution curve at different cross-sections of the microcrack zone.Consequently,we distinguished between the microcrack zone and the concealed real fracture within it.The deviation was validated as slight as 1–3 mm.

Workplace harassment faced by female Nepalese migrants working aboard

Background:Nepal has a long history of labour migration over the years.Migrants can experience a range of problems in their destination countries,and women are more at risk than men.This paper is the first to explore the problems faced by Nepalese women migrants while working abroad.Methods:This study was conducted among 1,889 women who were registered as migrant returnees at an organisation called Pourakhi Nepal.The study extracted and analysed data from a non-governmental organisation that supports returning female migrant workers in Nepal.Results:Around half(43.1%)of the women were 35 or older,30.9% were illiterate,and 63.6% were in their first overseas job.More than one-third(38.5%)had self-reported workplace harassment.Physical violence was the most prevalent(68%),followed by verbal abuse(37.5%),mental stress(29.7%),and sexual abuse(14.1%).Women who were illiterate(adjusted odds ratio[AOR]1.25,95% confidence interval[CI):1.01 to 1.55),unmarried(AOR 1.27,95%CI:1.05 to 1.56),worked abroad twice or more(AOR 1.35,95%CI:1.10 to 1.66),changed their place of work(AOR 2.38,95%CI:1.42 to 4.01),lived without documents(AOR 1.24,95%CI:1.03 to 1.50),worked as domestics(AOR 3.56,95%CI:2.03 to 6.23),worked in other than Gulf Cooperation Council countries(AOR 1.45,95%CI:1.06 to 1.99),women who did not have a fixed salary(AOR 1.64,95%CI:1.28 to 2.10)and did not receive salary(AOR 3.71,95%CI:2.88 to 4.77)were more likely to be harassed at work.Conclusion:Our findings suggest that the host governments should introduce and enforce policies protecting women in the workplace.Migrant women should be provided with better information about health risks and hazards as well as how to improve preventive measures in destination countries to reduce workplace harassment.

Hydrochemical characteristics of surface water in Hengduan mountain region of Eastern Tibet and its response to human activities:A case study of Duoqu Basin,Jinsha River

The analysis of hydrochemical characteristics and influencing factors of surface river on plateau is helpful to study water hydrological cycle and environmental evolution,which can scientifically guide rational development and utilization of water resources and planning of ecological environment protection.With the expansion and diversification of human activities,the quality of surface rivers will be more directly affected.Therefore,it is of great significance to pay attention to the hydrochemical characteristics of plateau surface rivers and the influence of human activities on their circulation and evolution.In this study,surface water in the Duoqu basin of Jinsha River located in Hengduan mountain region of Eastern Tibet was selected as the representative case.Twenty-three groups of surface water samples were collected to analyze the hydrochemical characteristics and ion sources based on correlation analysis,piper trigram,gibbs model,hydrogen and oxygen isotopic techniques.The results suggest the following:(1)The pH showed slight alkalinity with the value ranged from 7.25 to 8.62.Ca^(2+),Mg^(2+)and HCO_(3)^(–)were the main cations and anions.HCO_(3)^(-)Ca and HCO_(3)^(-)Ca·Mg were the primary hydrochemical types for the surface water of Duoqu River.The correlation analysis showed that TDS had the most significant correlation with Ca^(2+),Mg^(2+)and HCO_(3)^(–).Analysis on hydrogen and oxygen isotopes indicated that the surface rivers were mainly recharged by atmospheric precipitation and glacial melt water in this study area.(2)The surface water had a certain reverse cation alternating adsorption,and surface water ions were mainly derived from rock weathering,mainly controlled by weathering and dissolution of carbonates,and secondly by silicates and sodium rocks.(3)The influence of human activities was weak,while the development of cinnabar minerals had a certain impact on the hydrochemistry characteristics,which was the main factor for causing the increase of SO_(4)^(2–).The densely populated county towns and temples with frequent incense burning activities may cause some anomalies of surface water quality.At present,the Duoqu River watershed had gone through a certain influence of mineral exploitation,so the hydrological cycle and river eco-environment at watershed scale will still bound to be change.The results could provide basic support for better understanding water balance evolution as well as the ecological protection of Duoqu River watershed.

Impact of well placement and flow rate on production efficiency and stress field in the fractured geothermal reservoirs

Geothermal energy has gained wide attention as a renewable alternative for mitigating greenhouse gas emissions.The advancements in enhanced geothermal system technology have enabled the exploitation of previously inaccessible geothermal resources.However,the extraction of geothermal energy from deep reservoirs poses many challenges due to high‐temperature and high‐geostress conditions.These factors can significantly impact the surrounding rock and its fracture formation.A comprehensive understanding of the thermal–hydraulic–mechanical(THM)coupling effect is crucial to the safe and efficient exploitation of geothermal resources.This study presented a THM coupling numerical model for the geothermal reservoir of the Yangbajing geothermal system.This proposed model investigated the geothermal exploitation performance and the stress distribution within the reservoir under various combinations of geothermal wells and mass flow rates.The geothermal system performance was evaluated by the criteria of outlet temperature and geothermal productivity.The results indicate that the longer distance between wells can increase the outlet temperature of production wells and improve extraction efficiency in the short term.In contrast,the shorter distance between wells can reduce the heat exchange area and thus mitigate the impact on the reservoir stress.A larger mass flow rate is conducive to the production capacity enhancement of the geothermal system and,in turn causes a wider range of stress disturbance.These findings provide valuable insights into the optimization of geothermal energy extraction while considering reservoir safety and long‐term sustainability.This study deepens the understanding of the THM coupling effects in geothermal systems and provides an efficient and environmentally friendly strategy for a geothermal energy system.

The Damaging Effects of Abstracting the Deep Aquifers’Groundwater in Jordan-Quality Constraints

The deep aquifers in Jordan contain non-renewable and fossil groundwater and their extraction is quasi a mining process, which ends in the depletion of these resources. Although aquifers in the majority of groundwater basins in Jordan are vertically and horizontally interconnected stratification in different water quality horizons with generally increasing water salinity with the depth is observed. Many officials and planners advocate the extraction of deep salty and brackish water to be desalinated and used in household, industrial, and agricultural uses. In this article, the quality of the groundwater in the different deep aquifers and areas in Jordan is discussed. The results of this study show that the consequences of the deep groundwater exploitation are not restricted to depletion of the deep aquifers but also that the overlying fresh groundwater will, due to vertical and horizontal interconnectedness of the different aquifers, percolate down to replace the extracted deep groundwater. This will cause the down-percolating fresh groundwater to become salinized in the deep saline aquifers, which means that extracting the deep brackish and saline groundwater is not only an emptying process of the deep groundwater but also it is an emptying process of the fresh groundwater overlying them. The results allow to conclude that any extraction of the deep groundwater in areas lying to the north of Ras en Naqab Escarpment will have damaging impacts on the fresh groundwater in the overlying fresh groundwater aquifers. This article strongly advises not to extract the deep brackish and saline groundwater, but to conserve that groundwater as a base supporting the overlying fresh groundwater resources, and that will help in protecting the thermal mineralized water springs used in spas originating from these deep aquifers. The increasing water needs of the country can be covered by the desalination of seawater at Aqaba, which is the only viable option for Jordan at present and in the coming decades.

竞争环境中学习算法的预检测机制

多Agent系统中(MAS),所有的Agent都在不断学习,对于单个Agent来说就是一个学习移动目标的问题.PHC(policy hill climb)算法理性但自博弈时并不收敛.不过,PHC自博弈时的平均策略却能够快速且精确地收敛到纳什均衡(NE).在一些需要NE作为先验知识或需要收敛到NE的算法中,可以通过增加一个PHC自博弈过程来估计NE,然后再根据对手策略采取进一步措施.这样,不仅可以避免使用其他算法计算NE,而且能够使学习者至少获得均衡回报.Exploiter-PHC算法(Exploiter算法)能够击败大多数公平对手但需要NE作为先验知识,且自博弈时也不收敛.在其中加入预检测过程后的算法ExploiterWT(exploiter with testing)能够收敛且不需要先验知识.除此之外,该过程也可以加入其他一些算法之中.

Characteristics and Measurements of Ecological Compensation in Ecosystem

This research was to introduce the characteristics of and countermeasures for ecological compensation. From the analysis of the current situation of ecological compensation, a series of characteristics of ecological compensation in resource exploitation and economic development were elaborated. The principles and practical issues are complex in ecological compensation, and the corresponding object, entity, financial system of ecological compensation are the keys to set up compensation mechanism, and studying of ecosystem service function and ecological footprint calculation are important ways to quantitatively assess ecological compensation, and are also important foundations for establishing calculation system of green GDP. Advocating the benefit compensation mechanism of ecological economy and enclosing ecological compensation principle are important ways for establishing the new environmental management pattern and manifesting social justice and the ecological civilization ideas. This research proposed some views of and approaches to ecological compensation mechanism for constructing natural resource development and utilization.The establishment of ecological compensation is an important approach to prevent the imbalance of resource allocation, the system guarantee for sustainable development, and the important basis of saving resources.

Exploitation and Utilization of Insect Protein Feed Resources

The insect is the animal protein feed resource potential, the rapid repro- duction, large quantity, high protein content, and most species of insects can be used as livestock feed utilization, development of insect as feed resources, to pro- mote the development of China＇s animal husbandry and feed industry, has important significance.

BitTorrent网络的搭便车及恶意攻击研究

通过分析BitTorrent网络中BitThief、BitTyrant、Large View exploit、Sybil、声称自己拥有文件块、仅连接种子这6种搭便车攻击和发布虚假块、不合作、Eclipse这3种恶意攻击的主要策略和攻击方法,总结搭便车攻击和恶意攻击的特点与相同之处以及BitTorrent存在的问题,为改进BitTorrent网络协议提供参考。

Study on Utilization and Development of Hot Spring in Liaocheng City

The basic situation and formation mechanism of hot spring in Liaocheng were introduced,and its utilization value as well as exploitation and utilization status were also analyzed in this study,which provided strategies for exploitation and utilization of hot spring in Liaocheng.

从社会现象的批判到社会关系本质的批判——马克思和恩格斯对施蒂纳批判局限性的批判

面对资本主义市场经济体制下的商品拜物教现象,以及在这一现象笼罩下人与人之间关系的扭曲与异化,施蒂纳沿着功利主义的思路进行认识和批判,而马克思和恩格斯则从当时政治经济学已经达到的认识程度出发,对施蒂纳的批判思路从功利主义根源上进行了揭示,并认为其局限性不完全在于对一定的社会现象仅仅进行意识形态的批判,而在于没有对不同性质的社会关系即财产交往关系与劳资交往关系进行区别,正是沿着这一思路,马克思开始了漫长的政治经济学研究历程。

Reflection on the Exploitation of Rural Tourism Resources in Zhenjiang City

Rural tourism, i.e., agrotourism, is the newly-exploited tourism product[1] with agricultural production, rustic view, rural life and rural custom as the main carrier and with agriculture and countryside as the tourism resources. Zhenjiang City is in possession of adequate source markets, abundant rural tourism resources, good tourist ecological environment and profound culture. The pleasant ecological environment and charming rural scenery provide the development of rural tourism in Zhenjiang with exceptional advantages. The exploitation of rural tourism not only promotes the exploitation and development of agricultural tourism in Zhenjiang, but also improves the structure of tourism product, simulating the healthy development of rural economy. Through the analysis of the exploitation advantage of the rural tourism resources in Zhenjiang, the author analyzed the exploitation situation and existing problems of the rural tourism resources in Zhenjiang. The author considered that the rural tourism development in Zhenjiang was lack of unified planning; the cultural content of tourism product was low; the development depth was not enough; the construction of infrastructure was lagging behind; and meanwhile, it was lacking of funding, tourism program and advertising promotion. In the light of the above deficiencies, a series of countermeasures of rural tourism exploitation was put forward, that is, to complete the exploitation planning of the rural tourism resources, promoting the cultural taste of the rural tourism product; to enhance the publicity of the rural tourism, highlighting the brand feature of local tourism and creating high-quality product; to conduct standard management, strengthening the training of tourism management personnel.

The Orientation and Development of Zhenjiang Pearl S.Buck Tourism Products Exploitation

This study aimed to make an orientation for the development of Zhenjiang Pearl S.Buck tourism products.According to the spatial structure styles of tourism products,this paper discussed the exploitation of Zhenjiang Pearl S.Buck tourism products from the perspective of spot products,linear products and network products.It expanded the Pearl S.Buck research to tourism science field and put forward some ideas of promoting the comprehensive benefits of Pearl S.Buck tourism resource as well as the exploitation of similar tourism products.

汉译英时英语行为抽象名词的使用问题

有人说,汉英两种语言的一个最大差别是汉语用动词多,英语用名词多,因此提出“汉语中有些动词有时在英语中改用名词,会更添英语味儿”。这里所谓的名词,恐怕主要指英语名词类中那些有着与其在意义和形态上相应的动词形式的行为抽象名词。如: love→love expose→exposure sale→sell develop→development believe→belief exploit→exploitation但上述提法有甚科学根据?在翻译实践中,如何准确地把握所谓的“有些”或“有时”?要搞清这些问题,恐怕还得从在英语中为何使用行为抽象名词谈起。

Trend and Countermeasures for the Development of Rural Resident Tourism Market

The development status of rural resident tourism market is introduced in this study,and its potential influencing factors are analyzed.With coastal areas as the study case,the future development trend of rural resident tourism market in China is predicted from the aspects of market scale,consumption pattern,tourism level and tourism season,moreover,countermeasures are put forward for the healthy and sustainable development of rural resident tourism market.

Gradient Differentiation and Exploitation Mode of Tourist Resources in Hailuogou Scenic Area,China

Natural environment of Hailuogou Scenic Area(Conch Gully)was introduced,and it was pointed out that tourist resources in the study area showed gradient differentiation along the vertical height.In view of such gradient differentiation,resource contents and characteristics of its cultural heritages zone,geothermal resources zone,forest vegetation zone,and glacial resources zone were respectively analyzed.Based on the gradient differentiation of tourist resources in Hailuogou Scenic Area,suggestions were given for its further tourism development,and it was stressed that brand effects of the attractions should be enhanced,infrastructure construction and maintenance of newly-explored scenic spots should be improved,and more efforts should be devoted to explore disastrous landform resources.This research is of practical significance for studying spatial differentiation and evolution mechanism of tourist resources in mountainous areas in western China,and also provides scientific support for the exploration of tourist resources in mountainous areas.