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中国经济安全到了建国以来很危险的时期
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作者 韩德强 《探索》 北大核心 2006年第6期177-180,共4页
有论者改变“中国企业”的定义:在中国的外资企业只要服从中国法律,就是中国企业。所以,中国企业的竞争力增强了。这样的推论是荒唐的。血汗工厂不是中国的成功之路。中国的经济安全到了建国以来很危险的时期。中国至少拥有部分头脑和... 有论者改变“中国企业”的定义:在中国的外资企业只要服从中国法律,就是中国企业。所以,中国企业的竞争力增强了。这样的推论是荒唐的。血汗工厂不是中国的成功之路。中国的经济安全到了建国以来很危险的时期。中国至少拥有部分头脑和心脏产业,才能使中国的经济安全有根本保证。 展开更多
关键词 改革开放 经济安全 危险时期
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冲击地压危险性预评价与实践 被引量:9
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作者 潘俊锋 秦子晗 +1 位作者 夏永学 王书文 《煤炭工程》 北大核心 2011年第10期83-86,共4页
基于采动高集中应力对冲击地压的显著影响作用,采用有限差分数值方法对开采区域分采区、工作面以及巷道,进行了冲击危险区域划分;利用弹性基础梁"见方"理论划分得出,21141工作面回采过程中将经历七个危险时期,其中第六危险期... 基于采动高集中应力对冲击地压的显著影响作用,采用有限差分数值方法对开采区域分采区、工作面以及巷道,进行了冲击危险区域划分;利用弹性基础梁"见方"理论划分得出,21141工作面回采过程中将经历七个危险时期,其中第六危险期为特别危险期。在危险区域、危险时期划分基础上,进行了冲击地压监测与防治实践,实践表明,对冲击地压煤层预先进行冲击危险区域、危险时期划分,有效指导了回采期间冲击地压监测与防治工作。 展开更多
关键词 冲击地压 危险性预评价 冲击危险区域 危险时期 应力集中
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Graft-versus-host disease after liver transplantation:A comprehensive literature review 被引量:16
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作者 Sami Akbulut Mehmet Yilmaz Sezai Yilmaz 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第37期5240-5248,共9页
AIM: To determine the factors affecting mortality in pa- tients who developed graft-versus-host disease (GvHD) after liver transplantation (LT). METHODS: We performed a review of studies of GvHD following LT pub... AIM: To determine the factors affecting mortality in pa- tients who developed graft-versus-host disease (GvHD) after liver transplantation (LT). METHODS: We performed a review of studies of GvHD following LT published in the English literature and ac- cessed the PubMed, Medline, EBSCO, EMBASE, and Google Scholar databases. Using relevant search phras- es, 88 articles were identified. Of these, 62 articles con- raining most of the study parameters were considered eligible for the study. Risk factors were first examined using a univariate Kaplan-Meier model, and variables with a significant association (P 〈 0.05) were then sub- jected to multivariate analyses using a Cox proportional- hazards model. RESULTS: The 61 articles reported 87 patients, 58 male and 29 female, mean age, 40.4 ± 15.5 years (range: 8 mo to 74 years), who met the inclusion criteria for the present study. Deaths occurred in 59 (67.8%) patients, whereas 28 (32.2%) survived after a mean follow-up period of 280.8 ± 316.2 d (range: 27-2285 d). Among the most frequent symptoms were rash (94.2%), fever (66.6%), diarrhea (54%), and pancytopenia (54%). The average time period between LT and first symptom on- set was 60.6 ± 190.1 d (range: 2-1865 d). The Kaplan- Meier analysis revealed that pancytopenia (42.8% vs 59.3%, P = 0.03), diarrhea (39.2% vs 61.0%, P = 0.04), age difference between the recipient and the donor (14.6 ± 3.1 years vs 22.6 ± 2.7 years, P 〈 0.0001), and time From first symptom occurrence to diagnosis or treatment (13.3 ± 2.6 mo vs 15.0 ± 2.3 mo, P 〈 0.0001) were significant factors affecting mortality, whereas age, sex, presence of rash and fever, use of immunosuppressive agents, acute rejection before GvHD, etiological causes, time of onset, and donor type were not associated with mortality risk. The Cox proportional-hazards model, de- termined that an age difference between the recipient and donor was an independent risk Factor (P = 0.03; hazard ratio, 7.395, 95% confidence interval, 1.2-46.7). CONCLUSION: This study showed that an age differ- ence between the recipient and donor is an independent risk factor for mortality in patients who develop GvHD after LT. 展开更多
关键词 Liver transplantation Graft-versus-host dis-ease IMMUNOSUPPRESSION RASH PANCYTOPENIA Diar-rhea CHIMERISM Age factors
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