全文获取类型
收费全文 | 3438篇 |
免费 | 5篇 |
国内免费 | 10篇 |
专业分类
各国政治 | 122篇 |
工人农民 | 104篇 |
世界政治 | 53篇 |
外交国际关系 | 93篇 |
法律 | 1292篇 |
中国共产党 | 167篇 |
中国政治 | 982篇 |
政治理论 | 68篇 |
综合类 | 572篇 |
出版年
2023年 | 2篇 |
2022年 | 1篇 |
2021年 | 3篇 |
2020年 | 5篇 |
2018年 | 8篇 |
2017年 | 3篇 |
2016年 | 3篇 |
2015年 | 15篇 |
2014年 | 16篇 |
2013年 | 115篇 |
2012年 | 170篇 |
2011年 | 549篇 |
2010年 | 387篇 |
2009年 | 329篇 |
2008年 | 306篇 |
2007年 | 216篇 |
2006年 | 254篇 |
2005年 | 169篇 |
2004年 | 165篇 |
2003年 | 129篇 |
2002年 | 101篇 |
2001年 | 86篇 |
2000年 | 75篇 |
1999年 | 66篇 |
1998年 | 4篇 |
1997年 | 15篇 |
1996年 | 4篇 |
1995年 | 5篇 |
1994年 | 21篇 |
1993年 | 19篇 |
1992年 | 22篇 |
1991年 | 22篇 |
1990年 | 19篇 |
1989年 | 28篇 |
1988年 | 26篇 |
1987年 | 27篇 |
1986年 | 24篇 |
1985年 | 8篇 |
1984年 | 9篇 |
1983年 | 2篇 |
1981年 | 4篇 |
1980年 | 2篇 |
1979年 | 5篇 |
1978年 | 4篇 |
1977年 | 2篇 |
1976年 | 4篇 |
1973年 | 3篇 |
1943年 | 1篇 |
排序方式: 共有3453条查询结果,搜索用时 15 毫秒
801.
Objective To explore the correlation between volume rendering(VR) statistics of medial clavicular epiphysis and living age,and establish the mathematical models for living age evaluation using the CT image of medial clavicular epiphysis based on the growth rules of osteoepiphysis of medial clavicle.Methods The CT images of the medial clavicles from 795 teenagers aged 15-25,387 males and 408 females,were collected in East and South China.VR 3D images were reconstructed from 0.60 mm-thick slice CT images.The epiphyseal diameter,sternal end diameter,and their respective diameter ratio(the left: x 1;the right: x 3);epiphyseal area,sternal end area,and their respective area ratio(the left: x 2;the right: x 4),were measured and calculated.All these observations were analyzed using SPSS 19.0 statistical software.The statistical differences in gender and age were analyzed by Mann-Whitney U test.The mathematical models were established using least square.Sixty trained subjects,30 males and 30 females,were tested to verify the accuracy of the established mathematical models.Results In the group of same age,x 1 showed significant difference in gender;the same results were observed in x 2,x 3,and x 4,which suggested that the growth rules of osteoepiphysis of medial clavicle were highly correlated with living age.The accuracy of these mathematical models were all above 67.6%(±1.0 year) and 78.5%(±1.5 year).Conclusion The mathematical models with reasonable accuracy could be manageable in practice to confirm the conclusion of the atlas method.The current study can contribute to the single skeletal age evaluation. 相似文献
802.
课题组 《辽宁公安司法管理干部学院学报》2013,(1)
我国民间治安防范力量正处于不断的发展壮大之中,通过对我国民间治安防范力量的研究状况进行宏观性的梳理,认为对此问题的研究具有重大的理论意义和现实意义. 相似文献
803.
804.
805.
在社会主义现代化建设中,充分发挥广大劳动者的积极性是至关重要的,我们应认识到劳动力生产要素在社会生产活动中的主导作用,并承认其与物力资本对等的权力,才能发挥劳动者的主人翁作用,为企业摆脱生产经营困境、改善经营管理和实现国民经济的可持续发展发挥其根本性作用. 相似文献
806.
Abstract. The state has become an economic agency of considerable importance. The reason given for the increasing size of the state is the feeling that the working of free markets leads to disappointing results. However, this view itself is often an illusion, since it is impossible to achieve the operational goals by which private action is judged. At that point the state takes over the allocation of resources, but its intervention also implies an unattainable goal. The state acts without specific rules of behaviour linking the goals of its intervention with the action itself. This often creates a gap between the benefits of the state action and the resources which the so-called beneficiaries are called upon to contribute. This occurs because, without any control or assessment, the actions depart from their initial goals, either because the would-be beneficiaries are no longer the ones who in fact benefit, or else because the promises made at the time of the intervention cannot be kept. This problem is illustrated by three examples. The theme of this paper is that the absence of rules of behaviour incites those who subsidize the state to withdraw their participation. The administrative attempts of the ppbs type did not produce good results. In conclusion, the article suggests that legislation which generates a program of activities should include both the evaluation process and a time limit for a legislative review. 相似文献
807.
808.
Section 1104 of the Administrative Simplification provisions of the Patient Protection and Affordable Care Act (hereafter referred to as the Affordable Care Act) establishes new requirements for administrative transactions that will improve the utility of the existing HIPAA transactions and reduce administrative costs. Specifically, in section 1104(b)(2) of the Affordable Care Act, Congress required the adoption of operating rules for the health care industry and directed the Secretary of Health and Human Services to "adopt a single set of operating rules for each transaction * * * with the goal of creating as much uniformity in the implementation of the electronic standards as possible." This interim final rule with comment period adopts operating rules for two Health Insurance Portability and Accountability Act of 1996 (HIPAA) transactions: eligibility for a health plan and health care claim status. This rule also defines the term "operating rules" and explains the role of operating rules in relation to the adopted transaction standards. In general, transaction standards adopted under HIPAA enable electronic data interchange through a common interchange structure, thus minimizing the industry's reliance on multiple formats. Operating rules, in turn, attempt to define the rights and responsibilities of all parties, security requirements, transmission formats, response times, liabilities, exception processing, error resolution and more, in order to facilitate successful interoperability between data systems of different entities. 相似文献
809.
Office of the National Coordinator for Health Information Technology Department of Health Human Services 《Federal register》2011,76(5):1261-1331
This final rule establishes a permanent certification program for the purpose of certifying health information technology (HIT). This final rule is issued pursuant to the authority granted to the National Coordinator for Health Information Technology (the National Coordinator) by section 3001(c)(5) of the Public Health Service Act (PHSA), as added by the Health Information Technology for Economic and Clinical Health (HITECH) Act. The permanent certification program will eventually replace the temporary certification program that was previously established by a final rule. The National Coordinator will use the permanent certification program to authorize organizations to certify electronic health record (EHR) technology, such as Complete EHRs and/or EHR Modules. The permanent certification program could also be expanded to include the certification of other types of HIT. 相似文献
810.
This rule is submitted as an interim final rule (IFR) in order to meet the Congressional requirement set forth in the National Defense Authorization Act (NDAA) for Fiscal Year (FY) 2011, Section 724, which required the Department of Defense to prescribe regulations by June 20, 2011, to establish the criteria, as had previously been studied in accordance with Section 717 of the NDAA 2008, that would allow licensed or certified mental health counselors to be able to independently provide care to TRICARE beneficiaries and receive payment for those services. Under current TRICARE requirements, mental health counselors (MHCs) are authorized to practice only with physician referral and supervision. This interim final rule establishes a transition period to phase out the requirement for physician referral and supervision for MHCs and to create a new category of allied health professionals, to be known as certified mental health counselors (CMHCs), who will be authorized to practice independently under TRICARE. During this transition period the MHCs who do not meet the requirements for independent practice as established in this rule, may continue to provide services to TRICARE beneficiaries under the requirements of physician referral and ongoing supervision. This transition period, ending December 31, 2014, will allow time for those MHCs who seek to continue providing services under the TRICARE program to meet the independent practice requirements as outlined in this notice. After December 31, 2014, the Department of Defense will no longer recognize those mental health counselors who do not meet the criteria for a CMHC and will no longer allow them to provide services even upon the referral and supervision of a physician. 相似文献