Influence of mode competition on beam quality of fiber amplifier

Theoretical and experimental studies of the influence of the mode competition on the output beam quality of fiber amplifiers are presented. Rate equations and modal decomposition method are used in the theoretical model. In the experiment, the output beam-quality factor of a fiber amplifier, which is based on a Yb-doped double-clad large mode area fiber as a function of the seed beam quality and the pump power of the amplifier, is measured. The experimental results are consistent with the theoretical analysis.

Mixed Market Competition in a Quality Differentiated Duopoly Model An Approach to Banking Sector

This paper attempts to develop a theoretical framework to investigate the competitive implications of quality choices of financial institutions whereby they charge prices to consumers based on their willingness to pay for the service qualities in the mixed market scenario under vertical product differentiation model. Initially, it analyzes benchmark equilibrium solutions of monopoly and duopoly to establish the degree of quality differentiation between two private banks in an uncover market configuration. Further, it estimates the quality differentiation between private and public banks, and examines the interaction between two market structures keeping public bank as both leader and follower, and then measures the social welfare from different prospectives. The explicit operation of two stages Nash equilibrium game forecasted that public banks＇ monopoly seems to be still better than a private banking, and it is socially optimal. The outcome demonstrates a significant importance of vertical quality differentiation for policy implication in banking industry and provides an insight on the reasons of particular co-existence of public and private banking services in the specified location. In this context, it is concluded that the presence of public banks in banking industries is a crucial condition for obtaining the higher range of social welfare.

Impacts of trade-in program on duopoly competition with product quality differentiation and secondhand market

Considering the existence of the secondhand market and the implementation of trade-in program,the competition models between two manufacturers who produce the same products at various qualities are developed by the Nash game,and the impacts of the trade-in program from the perspectives of the demands,profits,marginal profits of manufacturers and the net costs of consumers are investigated.It finds that the trade-in program has different impacts when it is implemented by different manufacturers.When the low-quality manufacturer implements the program,it is always beneficial to himself and consumers but harmful to the high-quality manufacturer.However,when the program is implemented by the high-quality manufacturer,it can be beneficial to the low-quality manufacturer as well as to the implementer but harmful to consumers if the transaction cost of the consumer selling the used product in the secondhand market is low enough.Furthermore,with the increase in transaction cost,it also becomes harmful to the low-quality manufacturer and beneficial to consumers,which is the same as in the case that the low-quality manufacturer implements the trade-in program.The impacts of related parameters on the demands,marginal profits of manufacturers and the net costs of consumers are also analyzed.

Service Quality Measurement and Competition Strategy Analysis of Online Shopping

E-Commerce refers to such business behavior as conducting trades on a virtual network through the Internet.The core elements contributing to the success of online stores include not only the web-based presentation and the low-price strategy but the quality of online service as well.Importance-Performance Analysis is a method frequently used to evaluate performance and analyze competition strategies.Using IPA,this study analyzed and investigated the service quality of the online shopping of a case company and proposed 10 indexes to measure the service quality of online shopping.a number of suggestions on competition strategies were provided for the case company to improve its competition strategies.

Analyze the Thinking Quality of Host from the Host Competition reTake ＂the Sixth CCTV Television Presenter Contest＂ for Example

Based on analysis of schedule setting and player performance of the sixth CCTV host contest, we discuss the selection contest idea and point out that the good quality of thinking is the core host of outstanding quality, and the thinking quality of excellent host has three dimensions （depth of thinking, thinking, breadth and sensitivity thinking）. Hosts should made efforts to nurture their spirituality and personality under the guidance of this scale.

Group planting of cherry (Prunus avium L.) fosters growth and tree quality is superior to conventional row planting in Germany

Wild cherry trees produce high-quality timber and provide multiple ecosystem services. However, planting and tending cherry stands in conventional rows are too costly. Therefore, low density group planting was trialled as an alternative to row planting. The mortality, growth, and quality of planted cherry trees were compared between the group and row planting. The influence of neighbourhood competition and light availability on growth and quality was studied. The group and row planting of cherry trees were established at a wind-thrown site in southwestern Germany in the year 2000. In group planting, five cherry seedlings and seven lime seedlings （Tilia cordata Mill.） were planted with a 1 x 1 m spacing. In total, 60 groups were planted per hectare with a 13 × 13 m spacing. In contrast, 3300 seedlings （2475 cherries and 825 limes） were planted per hectare in row planting with a 3 × 1 m spacing. Ten groups and plots （10 × 10 m） were randomly established in group and row planting stand, respectively. The survival rate, stability （height to diameter ratio）, diameter, and height growth were significantly higher in group planting. In the group plantings,40.5% of cherry trees had straight stems and 13.5% had a monopodial crown compared with 15% with straight stems and 2% with a monopodial crown in row planting. The proportion of dominant cherry trees in canopy was 49% in groups compared with 22% in rows. The length of branch free bole was significantly higher in cherries planted in groups than those grown in rows. Intra- and interspecific competition reduced the growth and stability of cherry trees in row planting, but not in group planting. Light availability did not cause any significant effects on growth and quality between group and row planting. This first study on cherry group planting indicates that the survival rate, growth, and tree quality were higher in groups than in rows at this early development stage. The competition by naturally born seedlings was an important reason for the difference in performance between group and row planting. This study will encourage forest practitioners to establish more cherry group planting trials on multiple sites to test the effectiveness of this alternative technique as a tool of regeneration and restoration silviculture.

Sensory Evaluation of Extra Virgin Olive Oil （EVOO） Extended to Include the Quality Factor ＂Harmony＂

Sensory evaluation of olive oil, meaning the official organoleptic assessment of olive oil respectively the ＂Panel Test＂ （PT）, is based on the standards of the International Olive Council （IOC）, as well as on the Regulation （EC） 640/2008 of the European Commission. These regulations lead to the classification of olive oil as ＂extra virgin＂ （EVOO）, ＂virgin＂ （VOO） or ＂lampant＂, which however is not sufficient to clearly discriminate between different quality levels within the grade EVOO. The objective of the study at hand was to develop and validate an objective sensory evaluation method for the quality certification of olive oil within the grade EVOO. A new rating system, including a detailed description and evaluation of the complexity and persistence of flavour, was established. First, a comparison between different profile sheets from various olive oil competitions （Ercole Olivario, Premio Biol, Leone D＇Oro Mario Solinas Award, among others） and the official profile sheet from the IOC/EC for the panel test （PT） took place. In consecutive steps the basic test procedure from the panel test （PT） then was extended with additional sensory descriptors. Two trained olive oil panels （the German Olive Oil Panel （DOP） and the Swiss Olive Oil Panel （SOP）） were further educated to profile various green and ripe aroma components and to evaluate the complexity of the perceived aroma components and their persistency （descriptor： ＂harmony/persistency＂）. This extended methodology was cross-validated over a time period of 3 years between the two panels （DOP/SOP）.

Normative Versus Perceptual Gap Analysis of Hotel Product Quality as a Service to Tourism in Kenya

Kenya＇s tourism business stagnated from 1991 to 2003 and only registered small but steady grew from 2004. One of the sectors that recorded poor performance as a result of the slow growth of tourism is the hotel business. Despite this slack, stakeholders in Kenya have not tried to assess the extent to which the quality of this sector may impact on destination preference. The ultimate purpose of this research was to establish the quality gap between the expected and the perceived hotel product/service quality from both the perspective of the tourists and the hotel operators in Kenya. It was motivated by the need to create parameters that can elavate the competitiveness of Kenya＇s tourism using the hotel product/service quality offer. Descriptive quantitative research design was used to establish the secondary objectives and to assess two propositions set for the study. A sample of 211 tourists and 19 hotel operators in two major tourist provinces of Kenya was used to obtain information regarding normative and perceptive hotel product/service quality. Kenya＇s only destination marketing organisation, Kenya Tourist Board （KTB） marketers were also surveyed to provide insight on Kenya＇s destination position with regard to the motivation of tourists to visit Kenya. The study established that although the attractions which make tourists come to Kenya are the unique wildlife safari, beach tourism and the natural scenery, hotel product quality and hospitality plays a vital role in motivating tourists to choose Kenya as the destination to visit. However, this study found out that while the tourists and hotel operators agree on the normative hotel product quality level, there is a significant gap between the normative quality and the perceptual quality registered by tourists who used hotel services. The study established that hotel operators only recognize quality regulatory institutions with statutory and legal authority to incriminate facilities that do not comply with laid down operational requirements such as Hotels and Restaurants Authority and the Local Authority Public Health Department. The study has proposed an integrated framework that may be utilized to build a superior national hotel product/service quality so that the economic potential of tourism is maximized in Kenya.

A Study of the Relationships Among Total Quality Management, Executive Ability, and Sustainable Competitive Advantage

It is very important for organization to deal with and balance the challenge of environmental complexity and inner resources scarcity. This study considers total quality management (TQM) as a factor linking internal and external of organization and executive ability as linkage to promote and coordinate internal-external elements and then organization obtains its sustainable competitive advantage. The research surveyed effective samples 252 and used Structural Equation Model (SEM) and discriminated analysis for analysis and testing. The results indicate that TQM positively affects executive ability and firm sustainable competitive advantage. Executive ability affects firm sustainable competitive advantage and has the mediating effect between TQM and firm sustainable competitive advantage. Managerial practice implications, limitations, and future research directions have been discussed.

Human Resource Management and Quality Assurance System to achieve Competitive Advantage

This study aims at the role of human resources management and quality assurance system to achieving the competitive advantage for the organization.Human resource management are the most important component among the organization’s components,because,even an organization owns all other resources(materials,financial,technological)without the appropriate,skilled and experienced human resources,failure will be the expected result.Addressing By the Mobilis Telecom company,the study and through exploring the recruitment resources and methods that used by the company,in hiring the best employees,and the role of these methods in achieving the competitive advantage in Telecommunications sector.The findings of the study were that the company success in the recruitment process was relying on the employment agencies,firstly and on the universities,secondly.Also the company aimed on maintaining quality assurance system through recruiting method that based on Telecommunications experience and advancement in studying.In order to achieve the competitive advantage,the Company focused on innovation and creating new products and services for its clients.The statistical analysis proved that there is a strong relationship between recruitment resources used by the Company and achieving the competitive advantage,Also a relationship between the quality assurance system of the employees and the ability to gain the competitive advantage.

Quality Improvement through Contract Design and Competition in Agricultural Suppply Chains

Quality emerges as a pivotal competitive factor for agricultural products.Recently,retailers within agricultural supply chains have begun investing in technologies to improve quality and designing contracts to incentivize farmers to enhance their labor inputs.The farmers and the retailers incur different quality investment costs,with this cost increasing in the quality they provide.Simultaneously,retailers have embraced the farmer-competition strategy,employing competition to stimulate improved agricultural product quality among farmers.We construct a Stackelberg game model to analyze how farmers’quality investment,retailer’s contract design,and profits are affected by the retailer’s farmer-competition strategy.We show that the farmer competition introduced by the retailer is not always effective in improving the farmer’s quality investment.Similarly,the competition cannot always lead to additional profits for the retailer.Moreover,the supply chain profit suffers from the retailer’s farmer-competition strategy when the competition intensity between farmers is relatively large.Our results offer insights for retailers by identifying how should the retailer design the contract to improve the farmer’s quality effort given the existence of the farmer competition and under what conditions the retailer should adopt the farmer-competition strategy.

Male mate choice as differential investment in contest competition is affected by female ornament expression

High male mating effort and high variation in female quality select for male mate choice, which may be expressed as differential investment of reproductive effort based on female value. Male reproductive effort includes investment in direct contest competition with rival males for access to females, yet variation in male-male contest behavior is rarely examined in the context of male mate choice. We examine such male response to variation in female body size, reproductive state, and female-specific ornamentation in the striped plateau lizard, Sceloporus virgatus. We housed lizards in trios of 2 size-matched males and one female for 5 days, such that all 3 lizards were physi- cally isolated and the males could see the female but not each other. We then placed males simultaneously into the female＇s cage and scored the interaction. Male-male aggression was not significantly affected by female body size, reproductive state, nor ornament color, but was influenced by ornament size which reliably signals the phenotypic quality of the female and her off- spring. In the presence of larger-ornamented females, males engaged in more male-male aggressive display behavior more quickly, and performed fewer high-intensity contact behaviors but were equally likely to escalate to this riskier level of fighting. Our data suggest that males adjust their energetic investment during intrasexual competitive interactions in response to variation in the contested female which, assuming males gain direct or indirect benefits from their strategic allocation of reproductive effort, fits the modern understanding of male mate choice.

Penis size and sperm quality,are all bats grey in the dark?

Penises play a key role in sperm transport and in stimulating female genitals.This should impact post-copulatory competition,and expose penis characteristics to sexual selective pressures.Studies of male genitalia have repeatedly reported negative static allometries,which mean that,within species,large males have disproportionally small genitals when compared with smaller individuals.Males of some sperm-storing bat species may stand as an exception to such a pattern by arousing from hibernation to copulate with torpid females.The selection for large penises might take place,if a long organ provides advantages during post-copulatory competition and/or if females have evolved mechanisms allowing the choice of sire,relying on characters other than pre-copulatory traits(e.g.,penis size).In this study,we measured dimensions of the erected penis in 4 sperm-storing bat species.Furthermore,we collected sperm and evaluated the link between penis dimensions and sperm velocity.Our results revealed steep allometric slopes of the erected penis length in Barbastella barbastellus and an inverse allometry of penis head width in Myotis nattereri.More detailed studies of copulatory behavior are urgently needed to explain the range of observed scaling relations.Furthermore,penis head width correlates with sperm velocity in Plecotus auritus.For this last species,we propose that penis shape might act as a marker of male fertility.

Audit Competition in Insurance Oligopolies

We provide a simple framework for analyzing how competition affects the choice of audit structures in an oligopolistic insurance industry. When the degree of competition increases, fraud increases but the response of the industry in terms of investment in audit quality follows a U-shaped pattern. Following increases in com- petition, the investment in audit quality will decrease if the industry is initially in a low competition regime while it will increase when the industry is in a high competition regime. We show that firms will benefit from forming a joint audit agency only when the degree of competition is intermediate; in this case, cooperation might improve to- tal welfare and we analyze the effects of contract innovation on the performance of the industry.

The Effect of Green Technology Adoption Strategy on Duopoly Competition

Given consumers’trade-offs between conventional economic and environmental attributes of products,we provide a game-theoretic model to explore the role of GTA strategy in duopoly competition by incorporating two salient features:Two product types—The green product produced by a firm with GTA strategy and the ordinary product produced by a firm without GTA strategy,and two consumer segments,i.e.,the green consumers who are willing to pay for green products and the ordinary consumers who are willing to pay for ordinary products.Our analysis shows that GTA strategy may either increase or decrease the green firm’s quality provision.The subtle relationship between the green firm’s quality strategy and GTA strategy not only affects its own equilibrium performances but its rival’s.We also find that two consumer segments may be better off in the presence of a lower GTA intensity.Additionally,although the GTA strategy benefits the environment,the GTA investment is not the more the better.Finally,we find that GTA strategy would lead to higher social welfare only when the GTA efficiency is high enough.Our work not only provides an alternative economic explanation why some firms choose to implement GTA strategy and some do not in reality,but gives managerial insights for firms with different GTA strategies as well as policy insights for the social planner.

大国竞争背景下新质生产力形成的理论逻辑与实现路径

新质生产力是习近平总书记基于大国竞争背景下我国发展阶段、发展环境、发展条件变化,作出的具有根本性、全局性、长远性的重大战略判断。在新一代信息技术加速突破应用、先进制造技术加速产业转型的新发展阶段,形成新质生产力既是构建新发展格局、推动高质量发展的必然要求,也是我国建设现代化经济体系的关键动能,关系我国在未来发展和国际竞争中赢得战略主动。新质生产力的内涵是以引领国际经济体系变革、重塑现代化产业体系、提升企业核心竞争力为目的,从传统生产力向新质生产力的演化升级应该包含国际竞争、国家优势和企业发展三个层面整个生产范式的转变。文章以马克思主义政治经济学、习近平经济思想、习近平生态文明思想为理论支撑,提出“新质生产力”的理论构建包括三个维度:一是微观载体——打造世界一流企业;二是中观治理——提升国际竞争优势;三是宏观发展——构建人类命运共同体。文章将新质生产力形成的理论逻辑和实践路径融入中国当前的发展战略中,从转变企业发展范式、重塑现代化产业体系和建设新的全球治理体系三个方面提出形成新质生产力的改革路径,三条路径相辅相成、协同发力,共同为新质生产力的形成注入活力,使得生产力发展更好地服务于中国高质量发展的战略定位。

数字化提升企业绿色创新质量的机制研究

选取中国A股上市公司的面板数据,运用多元回归分析模型,考察企业数字化对其绿色创新质量的影响,以及风险承担与市场竞争对二者之间关系的中介和调节机制。研究结果显示,企业数字化对其绿色创新质量具有提升作用,风险承担在企业数字化与绿色创新质量之间发挥部分中介作用,市场竞争对企业数字化与其绿色创新质量之间关系具有正向调节作用。进一步的分析结果显示:与民营企业相比,国有企业数字化对绿色创新质量的促进作用更大,且对中央企业的促进作用比地方国有企业大;与规模较小企业相比,规模较大企业数字化对绿色创新质量的促进作用更大;与处于衰退期的企业相比,处于成长期和成熟期的企业数字化对绿色创新质量的促进作用更大。研究结论能够为企业的数字化战略安排和政府的市场竞争环境培育提供有益的借鉴和启示。

惟精惟勤,玉汝于成:信贷专业化与企业新质生产力发展

面对世界百年未有之大变局,基于行业专业化的产业金融发展对加速形成新质生产力举足轻重。立足于新质生产力的基本内涵构建企业层面指标体系,基于A股上市公司2011—2022年数据,考察信贷专业化对企业新质生产力的影响及机制。研究发现,信贷专业化通过优化资本结构、改善投资效率、提高风险承担,促进企业新质生产力发展。异质性分析表明,信贷专业化对新质生产力的促进作用在规模较小、银企关联较弱和公司透明度较低的企业中更显著。此外,银行竞争、金融数字化和科技金融政策能发挥协同效应。因此,应鼓励银行制定特色化、专业化的发展战略,同时重视银行竞争格局和科技金融生态的建设和完善,促进新质生产力加速形成以助力中国式现代化。

推进资本市场高质量发展的理论逻辑与政策构想

资本市场在金融体系运行中具有重要枢纽功能,加快推进资本市场高质量发展,发挥好资本市场功能,对实现经济高质量发展、构建新发展格局、服务实体经济、建设金融强国及防范化解金融风险具有重要的现实意义。未来,推进我国资本市场高质量发展,活跃资本市场,要紧紧围绕深化资本市场供给侧改革、提高上市公司质量、培育一流投资银行和投资机构、引导长期资金入市和推进资本市场高水平对外开放来展开。

技能大赛引领师生共建优质教学资源路径探析

为了提高职业院校教学质量,培养满足职业岗位需求的复合应用型人才,开发和建设符合现代教学需求的优质数字化教学资源是必不可少的环节。职业技能大赛是集中展现职业院校学生风采,充分展示职业教育改革丰硕成果的学生职业能力素养的竞赛活动。以国赛中园艺赛项内容转化为教学资源作为切入点,以师生共同设计和录制教学视频以及校企合作制作实操动画的过程为研究对象,探索技能大赛引领,师生共建优质教学资源的模式和路径,以期提升课堂教学效果、增强学生自主学习能力和信息化素质,进而推动教学改革的深入开展。