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面向车联网技术的BOA应用研究

交通运输系统工程与信息 2012年第6期12卷 66-71页

作者：崔建明长安大学信息工程学院西安710064 陕西省道路交通智能检测与装备工程技术研究中心西安710064

交通信息化提高了交通效率,物联网技术为交通信息化的发展带来更多新技术、新方法,由此产生了"车联网技术".物联网技术是一种在发展的新技术,故此车联网技术在应用过程中存在一些技术障碍,如车辆细部部件的监控等.本文提出一种通过BOA... 详细信息

交通信息化提高了交通效率,物联网技术为交通信息化的发展带来更多新技术、新方法,由此产生了"车联网技术".物联网技术是一种在发展的新技术,故此车联网技术在应用过程中存在一些技术障碍,如车辆细部部件的监控等.本文提出一种通过BOA技术进行交通设备部件访问的服务技术,如果硬件本身具有嵌入式控制接口,通过BOA技术与这种接口集成可以远程对部件进行监控与参数修改.这样BOA通过CAN总线集成的操作可以对设备整体进行全部部件监控和更多的优化操作,甚至可以对BOA设置单独的虚拟IPv6地址,达到更大范围内的远程参数获取与监控.最后,通过具有BOA技术的可控视频监控实例证明,此种技术可行.

关键词：智能交通远程感知 BOA技术车联网部件监控 IPv6

梯级水库水沙联合优化调度多目标决策模型及应用

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水利学报 2013年第11期44卷 1272-1277页

作者：彭杨纪昌明刘方华北电力大学可再生能源学院北京102206

针对梯级水库运用过程中蓄水与排沙之间的矛盾,首先建立了梯级水库防洪、发电调度及泥沙冲淤计算子模型;然后,以水库防洪、发电、航运和泥沙冲淤为基本目标,建立了梯级水库水沙联合优化调度多目标决策模型,并采用约束法和加权理想点法... 详细信息

针对梯级水库运用过程中蓄水与排沙之间的矛盾,首先建立了梯级水库防洪、发电调度及泥沙冲淤计算子模型;然后,以水库防洪、发电、航运和泥沙冲淤为基本目标,建立了梯级水库水沙联合优化调度多目标决策模型,并采用约束法和加权理想点法进行非劣解求解和评价;最后,将该模型应用到溪洛渡-向家坝梯级水库汛末蓄水时间的研究中,得到了梯级水库蓄水时间与多年平均发电量和库容淤损率之间的非劣解集,并给出不同目标权重下满足梯级水库发电和减淤要求的最佳蓄水方案,为研究和解决多沙河流梯级水库水沙联合调度问题提供了技术手段。

关键词：梯级水库水沙联合优化调度多目标非劣解集

互动视角下进城农民工的阶段性回流——基于中国东部三大经济区的调查

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云南社会科学 2019年第5期 79-85页

作者：孙健田明沈阳师范大学北京师范大学社会发展与公共政策学院

进城农民工从城到乡的阶段性回流所引发的人口互动,是维系外出农民工与家庭留守人员情感的基本方式。基于2017年中国东部三大经济区的调查,在互动视角下考察进城农民工的阶段性回流,研究发现进城农民工的年龄、受教育程度,农民工家庭的... 详细信息

进城农民工从城到乡的阶段性回流所引发的人口互动,是维系外出农民工与家庭留守人员情感的基本方式。基于2017年中国东部三大经济区的调查,在互动视角下考察进城农民工的阶段性回流,研究发现进城农民工的年龄、受教育程度,农民工家庭的成员留守情况、年收入、成员亲密关系,农民工务工的外出距离、身份认同对回流效果有显著影响,这揭示出了农民工家庭责任与务工约束的耦合困局,验证了互动理论的部分假设。因此,进城农民工的阶段性回流既是一种空间的归巢,也是一种家庭角色与固有身份的回归。在城乡融合发展的关键时期,要着重关注进城农民工的回流互动,通过制定农民工法定假日、增加农村人口互动机会等措施来保障农民工的家庭团聚与情感满足。

关键词：进城农民工阶段性回流人口互动家庭关系城乡融合

Survey Analysis on Performance of Village Extension Workers in Beijing

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Asian Agricultural Research 2012年第9期4卷 13-15,19页

作者： SHI Yun-chang GONG Chun-ming WANG De-hai College of Humanities and Development China Agricultural University

To accelerate the improvement in construction of grass-roots agricultural sci-tech service system, establish the Village Extension Worker (VEW) service team, and satisfy increasing demand of Beijing's farmers for agricultural sci-tech services, Beijing Municipal Bureau of Agriculture selected and trained 500 village-level agricultural technicians to provide agricultural technical services in August 2010. We carried out an interview and questionnaire survey for the first 296 VEWs, and analyzed their basic information, to find out their current service situations, technical training and demand, as well as difficulties in the course of providing services. On the basis of these, we put forward our recommendations on improving the VEW construction.

关键词： Village Extension Workers (VEWs) Village-level agr

Effect of expiratory load on neural inspiratory drive

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Chinese Medical Journal 2012年第20期125卷 3629-3634页

作者： XIAO Si-chang LU Yi-rong GUO Hong-xi QIU Zhi-hui LUO Yuan-ming State Key Laboratory of Respiratory Disease Guangzhou Medical CollegeGuangzhouGuangdong 510120China Department of Critical Care Medicine Zhujiang HospitalSouthern Medical CollegeGuangzhouGuangdong 510280China

Background Neural respiratory drive is usually measured during inspiration, even in patients with chronic obstructive pulmonary disease （COPD） in whom the primary physiological deficit is expiratory flow limitation. The purpose of the study was to test the hypothesis that inspiratory muscle neural respiratory drive could be used to assess expiratory load. Methods Ten healthy young men, （26±4） years old, were asked to expire through a tube immersed in water where an expiratory load was required. The load was judged by the depth of the tube in water and the different loads （O cmH2O, 10 cmH2O, 20 cmH2O and 30 cmH2O） were randomly introduced. Each expiratory load lasted for 3-5 minutes and inspiration was unimpeded throughout. Diaphragm electromyogram （EMG） and transdiaphragmatic pressure were recorded by a catheter with 10 metal coils and two balloons. Incremental cycle exercise with and without an expiratory load at 30 cmH20 was also performed. Results Neural drive during expiratory loaded breathing was larger than during unloaded breathing but neural drive did not increase proportionally with increasing expiratory load; neural drive during expiratory loading at 0, 10, 20 and 30 cmH20 was （10.1±3.1） pV, （16.7±7.3） pV, （18.4±10.7） tJV and （22.9±13.2） pV, respectively. Neural drive as a percentage of maximum at the end of exercise with or without load was similar （（57.4±11.0）% max vs. （62.7±16.4）% max, P 〉0.05）. Conclusion Neural respiratory drive measured at inspiration does not accurately quantify expiratory load either at rest or during exercise.

关键词： diaphragm " exercise " expiratory load " electromyogram

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典型工业恶臭源恶臭排放特征研究

中国环境科学 2013年第3期33卷 416-422页

作者：韩博吴建会王凤炜左明冯银厂中国民航大学空中交通管理学院天津300300 南开大学环境科学与工程学院国家环境保护城市空气颗粒物污染防治重点实验室天津300071 天津环境监测中心天津300191

恶臭污染具有主观性和复杂性特点,结合使用仪器分析和嗅觉方法,可以从成分和感官两方面充分反映恶臭污染特征.本文参考USEPA TO14A和GB/T 14675-93方法,选择天津滨海新区内的6个不同类型的工业恶臭源,包括制药、喷漆、炼油、石化、树脂... 详细信息

恶臭污染具有主观性和复杂性特点,结合使用仪器分析和嗅觉方法,可以从成分和感官两方面充分反映恶臭污染特征.本文参考USEPA TO14A和GB/T 14675-93方法,选择天津滨海新区内的6个不同类型的工业恶臭源,包括制药、喷漆、炼油、石化、树脂合成和橡胶,采集了各类源工艺流程中通过有组织方式排放的恶臭废气,测定了废气的感官臭气浓度并定量分析了其中的恶臭VOCs物质.使用臭气浓度、恶臭指数及统计学方法进行研究,结果发现,炼油源和制胶源的废气具有非常严重的感官刺激性.甲硫醇等硫化物是炼油源和制胶源的主要特征恶臭物质;苯乙烯和甲苯分别是合成树脂源和喷涂源的特征恶臭组分;对苯二甲酸(PTA)源和制药源属于混合型恶臭源.甲苯是喷漆源和制药源的标识组分;二硫化碳是制胶源的标识组分;间,对-二甲苯可以用来标识石化PTA污染源;炼油源的标识组分为三氯乙烯、氯乙烷和1,2-二溴乙烷;苯乙烯是合成树脂源的标识组分.

关键词：恶臭工业源特征嗅觉标识

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一个可证安全的高效的代理盲签名方案

计算机工程与科学 2015年第9期37卷 1643-1651页

作者：周明王箭南京航空航天大学计算机科学与技术学院江苏南京210016

代理盲签名结合了代理签名和盲签名的优点,在电子商务等领域有着广阔的应用前景。目前大多数代理盲签名的安全性是启发式分析,没有形式化证明,并且大多没有考虑多一伪造攻击。提出了一个新型的代理盲签名安全模型,并在该模型下提出了一... 详细信息

代理盲签名结合了代理签名和盲签名的优点,在电子商务等领域有着广阔的应用前景。目前大多数代理盲签名的安全性是启发式分析,没有形式化证明,并且大多没有考虑多一伪造攻击。提出了一个新型的代理盲签名安全模型,并在该模型下提出了一个基于双线性对的代理盲签名方案,并在随机预言机模型下,证明了其在选择消息/授权文件攻击下是不可伪造的,其安全性可分别规约为CDH问题和Chosen-Target CDH问题。分析表明,该方案满足代理盲签名的主要安全要求,而且和已有的方案相比,本方案更加高效。

关键词：代理盲签名双线性对随机预言机多一伪造

A comparative study of different interventional therapies for primary liver cancer

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World Journal of Gastroenterology 1997年第4期3卷 33-35页

作者： LIU Qi, JIA YuChen, TIAN jianming, WANG ZhenTang, YE Hua, YANG JiJin and SUN Fei

IM To compare the therapeutic effect of three types of interventional management for pimary liver cancer.METHODS 468 patients with primary liver cancer were randomly allocated to three groups: 138 cases with chemotherapy alone using mitomycin C, adriamycin and 5FU (group A); 158 with chemoembolization using lipiodol (group B); and 172 with chemoembolization using lipiodol and gelfoam (group C). All patients were angiographically and sonographically followed up.RESULTS ① 675% patients in group C had the AFP value decreased by more than 50%, which was much higher than 433% ingroup B and 322% in group A; ② The tumor size reduced by ≥50% in 203% of group A, 412% of group B and 448% of group C. There was obvious difference between groups A and group B or C (P<001); ③ The oneyear and threeyear survival rates were 205%±36% and 19%±24% for group A, 513%±44% and 101%±49% for group B, and 630%±24% and 139%±50% for group C respectively. There was obvious difference among the three groups (P<005); ④ The mean survival time for patients in groups A, B and C were 96 months, 161 months and 179 months, respectively.CONCLUSION Chemoembolization with lipiodol and gelfoam is the most effective therapy for primary liver cancer in this study. The position of the embolization should be the far and middle sections of the hepatic artery, and the proximal section should be reserved as the route of the next intraarterial chemoembolization.

关键词： liver neoplasms/therapy chemoembolization therapeutic mitomycine adriamycin lipidol 5fluouracil gelfoam

Effects of Plant Oil Mixture on Production Performance,Carcass and Beef Quality in Beef Cattle

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Animal Husbandry and Feed Science 2011年第6期3卷 12-16页

作者： XIA Guang-jun YAN chang-guo LIU Cheng-ming Agricultural College Yanbian University Yanji 133000 China Hunchun Tianyi Livestock Husbandry Co. Ltd. Hunchun 133300 China

[Objective] To study the effects of plant oil mixture on production performance, carcass and beef quality in beef cattle. [Method] Single-factor randomized blocks design was used. Sixteen healthy Yanbian yellow bulls having close body weight were selected and randomly divided into four groups, four cattle per group. Been oil, safflower oil and sunflower oil were mixed respectively at a volume ratio of 11：5：4. The oil blend was added to the daily diets of beef cattle respectively at a proportion of 4%, 5% and 6%. The effects of the plant oil mixture on production performance, carcass and beef quality were investigated. [ Result.] Compared with the control cattle, the experimental cattle had significantly lower feed intake （P 〈 0.05）, non-significantly higher efficiency of feed utilization, and significantly lower digestibility of crude fiber and calcium （P 〈 0.05）. With the increasing level of plant oil, the digestibility of dry matter showed a decreasing trend. The digestibility of dry matter was significantly lower in the cattle fed on the plant oil mixture at a level of 6% than in the control （ P 〈 0.05）. The plant oil mixture had no effect on the digestibility of crude protein, ether extract, crude ash, nitrogen-free extract and phosphorus. With the increasing level of plant oil, the serum content of high-density lipoprotein showed an increasing trend. The serum content of high-density lipoprotein was significantly higher in the cattle fed on the plant oil mixture at a level of 6% than in the control （ P 〈 0.05）. With the increasing level of plant oil, the content of total cholesterol showed an increasing trend, whereas the content of low-density lipoprotein showed a decreasing trend. Moreover, other indicators did not change significantly. The experimental cattle had larger eye muscle area and better beef quality than the control group. The content of crude protein and ether extract in beef increased with the increasing level of plant oil. [ Conclusion] The plan

关键词： Plant oil Beef cattle Production performance Carcass Beef quality