LPG汽车技术发展与安全系统

介绍了液化石油气(LPG)汽车的加装部件、安全系统及三代产品(机械式燃料供给系统、电控LPG燃料混合系统、电控LPG喷射系统)的技术发展。     

要闻快递

国际新闻联合国专家提出暂停发展生物燃料5年以缓粮荒联合国食物权特别报告员齐格勒3月12日在人权理事会报告说.生物燃料的发展排挤世界粮食供给,全球应暂停发展生质燃料5年.直到确保生物燃料不来自粮食作物。生物能源发展大国巴西随即反驳齐格勒的论点。巴西坚信生物燃料能为发展中国家带来正面效益.不接受齐格勒所谓把食物转化为燃料是道制造灾难处方的说法。齐格勒在报告中说.一窝蜂发展生物燃料的趋势造成世界粮食价格大幅上扬。据估计,加满50公升油箱的生物燃料,需要     

试论天津城市工业区位形成机制

一、工业区位形成机制理论初探工业是现代城市主要经济功能之一,工业区位的选建在城市土地利用中占有重要地位。早期的工业区位理论主张在选建工业区位时,耍尽量降低生产成本,把运费减少到最低限度,以获得产品销售时的最大效益,为此,把原料燃料来源、市场、劳动力、运     

积极使用液化石油气作汽车燃料

该文指出液化石油气作为汽车燃料使用的各种优点,介绍液化石油气作为汽车燃料使用的方法,提出应大力推广使用液化石油气作汽车燃料。     

燃料视角下青海可持续发展探讨

青海省的牧区和农村普遍存在以牛粪作为燃料的现象.牛粪燃料虽然给人们的生活带来了方便,但是影响社会的可持续发展.因此,应该调整产业结构,发展"阳光能源"作为牛粪燃料的替代品.作为传统牛粪燃料替代品的"阳光能源"在青海省具有开发可能性.为了使燃料置换的可能性变为现实性,还需要构建一套包括政府宏观调控、产业结构调整、生态意识培养、社会保障在内的机制.     

联邦快递:新生代下的P-S-P理念

联邦快递常自豪于它的"紫色血液",因为这些身穿紫色工作服的员工对联邦快递来说,是不断增值的资产.这正是联邦快递历经25年考验、引以为豪的经营理念:P-S-P理念.所谓P-S-P即"员工People、服务Service、利润Profit"理念,它的内涵是:如果企业关心员工,他们就能为客户提供高品质的服务;满意度高的客户能带给公司更多的业务,带来效益;而这份效益将会再分享给员工,从而形成一个良性的循环.时至今日,职场涌入大量的生于1980年以后的Y一代生力军,对于被社会广泛地评价为自我、缺乏责任心和忠诚度的80后们,身处传统行业,联邦快递认为,这样的评价过于片面.在联邦快递,新生力军为公司带来了无限新气象.那么,联邦快递是如何对Y一代进行管理的?他们的HR政策有哪些特点呢?     

开发氢燃料的有功之臣:病毒

众所周知,氢燃料是一种清洁能源,然而令能源公司头疼的是氢燃料的生产成本,因此科学家正在想办法降低其造价。     

法国大力发展绿色公共汽车

介绍了法国发展绿色公共汽车及使用柴油加水混合燃料、天然气、液化石油气、植物油作汽车燃料的简况。     

低效的氢燃料汽车并不环保

正一直以来都在久肆宣传"氢燃料"的优越性,虽然早在2005年,劳埃德就提出了不同看法,但是主流思想却依旧强势。而今又有一位学者——朱利安·考克斯指出,氢燃料电池汽车并没有那么环保。她认为:目前氢燃料电池汽车比电池电动车昂贵得多,并且在接下来的几十年内都会如此。虽然这种情况会使得氢燃料电池汽车在大众市场上短期内不具有竞争力,但是大量的政府资金,依旧不断地注入这些不具有竞争力的车辆及其配套基础设施的研究和开发中。而     

从生物质制氢

介绍美国威斯康星大学化学工程师们研制的、用廉价的生物质在低温、液相中制取内燃机及燃料电池用氢燃料的方法。     

Internet alternative media,movement experience,and radicalism: the case of post-Umbrella Movement Hong Kong

This article examines the relationship between online alternative media consumption and public support for radical social movement goals and tactics. Theoretically, online alternative media use could relate to the holding of more radical views either because such views are propagated by the alternative media or because of the breeding of extreme views through communications among like-minded people. At the same time, this relationship is expected to be particularly strong when online alternative media use is coupled with specific types of movement experiences. Analysis of a representative survey (N = 1012) in Hong Kong shows that both online alternative media use and participation in the Umbrella Movement in 2014 related positively to the attitude toward violent protests and toward Hong Kong independence, and the relationship between online alternative media use and radical views was particularly strong among the Umbrella Movement participants. The analysis also shows a distinction between the implications of consumption of alternative media belonging to different political factions.     

Current Issues in Alternative Media Research

Research in alternative media has burgeoned since the turn of the millennium. The majority of studies has examined the political and social dimensions of alternative media and has focused on the media of social movements. The value of these amateur media projects lies not only in the content they produce, but also in the educational and political empowerment they offer to their participants. Other forms of alternative media, such as blogs and fanzines, present challenges to mainstream journalism; they challenge the exclusive authority and expertise of professional journalists. Recent research has begun to examine the relationship between alternative and mainstream media practices, particularly examining how alternative media offer ways of rebalancing media power and how 'ordinary' people are able to represent their own lives and experiences and concerns in ways that are often ignored or marginalised by the dominant media institutions. However, we need to learn more about specific alternative media practices and how audiences use their content.     

Social structure and personal choice

A review of representative literature in the newly developing area of alternative lifestyle research suggests an antisocial structural bias. The origin of this trend and its implications for a theoretically based social science of alternative lifestyles are explored. The aged, women, and Black families are viewed as examples where social structural conditions affect the diversity of intimacy, marriage, and family alternative lifestyles chosen. Current definitions of alternative lifestyles, individual freedom, and choice are seen as reflecting and supporting the social, political, and economic status quo in American society. It is concluded that a social science of alternative lifestyles is only possible when we more fully understand the individual, institutional, and historical dynamics determining the availability and feasibility of alternatives in intimacy, marriage, and family life.     

Age, ethnicity, and use of complementary and alternative medicine in health self-management

Drawing on models of health self-management, we develop hypotheses that age and ethnicity will modify associations among indicators ofpoor health and use of complementary and alternative medicine. These hypotheses are evaluated using the 2002 National Health Interview Survey with the Alternative Health Supplement. Results produced partial support for hypotheses that the effects of ailments on use of complementary and alternative medicine differ by age. Results suggest that ailments such as bodily pain, chronic conditions, and functional impairment are associated with use of complementary and alternative medicine among midlife and younger adults, but these associations are generally attenuated among older adults. Hypothesized ethnic differences received weak support. These findings suggest that different interpretations of ailments and appropriate responses may explain why complementary and alternative medicine is used by fewer older adults. The results also highlight the significance of social and cultural factors in understanding patterns of complementary and alternative medicine use in the adult population.     

Mixed results in a transitional planning program for alternative school students

Disciplinary alternative schools have a reputation as gateways to the juvenile and criminal justice systems. The authors conducted an evaluation of an intervention (Strategies for Success) designed to divert seventh-, eighth-, and ninth-grade alternative school students from this gateway. They used propensity score matching and a multivariate random effects model to estimate program impacts and found that the program not only increased attendance rates, at least in the short term, but also increased the likelihood of reassignment to alternative schools. The discussion focuses on possible reasons and solutions for high rates of return to alternative school and for the erosion of program effects.     

Beyond Mentoring: Alternative Sources and Functions of Developmental Support

Content analyses were used to explore alternative sources and functions of developmental support other than mentoring among nonfaculty university employees. The majority of participants reported that they had an alternative source of developmental support outside of a mentoring relationship, that the developmental functions (i.e., kinds of support) provided by these sources varied, and that there were differences in sources and functions by participant age and gender. The alternative source of support most frequently mentioned was coworkers. The results also suggested that alternative sources of support may provide many of the functions associated with traditional mentors, although the full range may not be represented.     

Are There Still Alternatives? Relationships Between Alternative Media and Mainstream Media in a Converged Environment

Media scholars and non‐scholars alike have long sought to discern and describe the differences between alternative media and mainstream media — a task that became harder in the digital age, as online communications blurred boundaries. This essay examines how theorists and researchers have attempted to clarify the term ‘alternative media’ and to explain why this category remains relevant in a networked society. Academics largely reject the alternative–mainstream dichotomy and view these media on a continuum, featuring many hybrids and few pure instances. While differences between the two forms are less apparent in liberal democracies than in authoritarian regimes, alternative media persist in being less commercial, producing more critical content and being more committed to social change than their mainstream counterparts. In a converged context, the idea of ‘alternative media’ with a dialectical, interdependent relationship to the mainstream remains important to many producers, users and scholars.     

Special majority rules and the existence of voting equilibria

This paper is concerned with voting rules in which one alternative defeats a second alternative if and only if it is preferred to the second alternative by a pre-specified proportion of the individuals who have strict preferences on the pair. In particular, the paper focuses on the potential of two alternative lower bounds (for the proportion used) as tools for studying the existence of voting equilibria (i.e., for studying the existence of alternatives which cannot be defeated). It establishes that there are certain important contexts where one of the two bounds does not directly reveal whether any voting equilibria exist, but the other one does.     

Individualism/Collectivism Orientations and Reactions Toward Alternative Human Resource Management Practices

In this study, we examined the relationship between individualism collectivism orientations of potential job seekers and their reactions toward alternative human resource management (HRM) practices in the areas of selection, performance appraisal, reward system, career system, and employment security. Using several subdimensions of individualism collectivism, we found many significant relationships between individualism collectivism orientations and preferences for alternative human resource management practices that might affect the effectiveness of alternative HRM practices.     

Estimation of International Migration in Post‐Soviet Republics

When annual migration data lack reliability, scholars apply alternative methods for estimating international migration. Yet, researchers note that alternative approaches have primarily been tested on developed countries, rather than developing countries that usually have dramatic migration shifts. I close this research gap. I use the example of 15 former Soviet republics to demonstrate several conclusions. First, I show that such alternative approaches as immigration‐by‐origin data of receiving countries do not result in reliable and valid estimates of post‐Soviet migration, given the large variation that exists in how former Soviet republics define “migrant”. Second, I demonstrate that population censuses, while a more superior alternative, fail to capture temporary migrants. In developing countries, the international emigration is mainly due to temporary (undocumented labour) migration. Third, I suggest that scholars and policy‐makers should apply household surveys as a possible alternative. However, while this method seems promising, given the limited use of household surveys in migration measurement in the post‐Soviet republics, future research by both scholars and applied researchers should explore the advantages and limitations of household surveys as an alternative source for estimation of migration. Finally, I outline methodological guidelines that researchers and scholars can advance on migration issues in the post‐Soviet region.