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71.
利用先进成熟的计算机技术和自动识别技术对特种设备相关业务进行管理已经成为提高效率、节约资源、减少浪费的必要手段,本院研发的“基于条码技术的特种设备检测数据溯源平台”(以下简称溯源平台),能够实现特种设备全过程的数据动态存储,并全部实现闭环管理,这是国内目前的检验软件没能实现的,本文对该软件的研究目的、研究过程及实现功能等情况作了较为详细的介绍。 相似文献
72.
“安全检测及监控”学科的历史任务 总被引:7,自引:2,他引:7
就安全检测及监控学科的内涵、外延进行了初步探讨,提出了应用现代科技手段,对 危险源进行监控预警、建立安全生产技术保障体系的设想。 相似文献
73.
介绍了可燃性气体检测的基本原理、检测探头应具备的抗干扰能力,并探讨了探头的布点方法和注意事项、仪表的标定及报警点设置、管理维护等问题。 相似文献
74.
火灾探测的原理和方法(上) 总被引:18,自引:2,他引:16
简述了火灾现象的物理特征、火灾探测的基本原理,并对火灾探测算法的建立及发展作了介绍。对产生火灾误报警的原因进行了分析,指出要改善火灾探测的准确性,缺少的不是思路和技术,而是火灾科学基础研究方面的积累。 相似文献
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76.
Jumin Hao Mei-Juan Han Songman Han Xiaoguang Meng Tsan-Liang Su Qingwu K. Wang 《环境科学学报(英文版)》2015,36(10):152-162
Arsenic (As) is one of the most toxic contaminants found in the environment. Development of novel detection methods for As species in water with the potential for field use has been an urgent need in recent years. In past decades, surface-enhanced Raman scattering (SERS) has gained a reputation as one of the most sensitive spectroscopic methods for chemical and biomolecular sensing. The SERS technique has emerged as an extremely promising solution for in-situ detection of arsenic species in the field, particularly when coupled with portable/handheld Raman spectrometers. In this article, the recent advances in SERS analysis of arsenic species in water media are reviewed, and the potential of this technique for fast screening and field testing of arsenic-contaminated environmental water samples is discussed. The problems that remain in the field are also discussed and an outlook for the future is featured at the end of the article. 相似文献
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78.
《Journal of environmental science and health. Part. B》2013,48(5):465-474
Eight different hot springs (SPA) in Greece were monitored over a one-year survey for priority pesticide residues. A specific and effective procedure including solid phase extraction in combination with HPLC and GC analytical methods were applied. Samples that were sensitive to nitrogen-phosphorus (NPD) and/or electron capture (ECD) detectors were analysed by capillary gas chromatography. From the twenty-six water samples, pesticide residues were detected in fourteen of them (54%) but no one exceeding the European Union Maximum Acceptable Concentration (MAC). Lindane (γ-BHC) was the most frequently detected pesticide. It was found in nine samples (35%) in concentrations from <0.005 to 0.01 μg/L. Other pesticides detected were phorate (in five samples), propachlor (in two samples) and chlorpyriphos ethyl (in three samples) but in concentrations far below the permissible levels. 相似文献
79.
Patricia V. Cline 《Environmental Forensics》2013,14(2):161-168
Making defensible risk-based decisions is a complex process that incorporates risk assessment into a risk management framework. Many site investigations require additional study, negotiations and/or actions for arsenic detected in soil samples, in many cases where no process related sources are identified and no other chemicals of concern are identified. Regulatory agencies develop guidance to standardize approaches to risk-based site investigations that focus on achieving "safe" concentrations. For arsenic, the action level is frequently in the "gray region", a U.S. Environmental Protection Agency (USEPA) term associated with a region of high uncertainty for risk management decisions in the "decision performance curve" associated with the data quality objective (DQO) process. Recognizing the conservative nature of the risk-based screening value for arsenic, approaches to enforce this level (or proof of comparability to natural background) may have numerous consequences including ineffective use of resources, stigmas on properties or actions at industrial or hazardous sites that are inconsistent with their regional setting. Florida has developed regulations and guidance on investigation of brownfield sites and has supported a study by the University of Florida (UF) to evaluate natural background concentrations in Florida soils. This paper discusses the sources of uncertainty near the soil cleanup target levels (SCTLs) in the Florida decision-making framework. 相似文献
80.
This study examines the impact of the creation of marine protected areas (MPAs), from both economic and biological perspectives. In particular, we examine the effects of protected patches and harvesting on resource populations. We conclude that protected patches are an effective means of conserving resource populations, even though extinction cannot be prevented in all cases. We discuss the dynamic optimization of a harvest policy by choosing E(t), the harvesting effort, as the dynamic variable. We also discuss the optimal equilibrium harvest policy and explain the biological and bioeconomic interpretations of the results. 相似文献