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61.
锦州地区地下水饮用水源污染因素及防治对策研究 总被引:1,自引:0,他引:1
通过对锦州地区地下水饮用水源水质监测数据分析,评价地下水饮用水源水质现状;针对部分水源水质超标现象,分析其成因,并在实地考察的基础上从工矿企业污染源、生活污染源、养殖业污染源、农业污染源和不合理开采等几方面进一步阐述水源地潜在污染因素;在此基础上从预防、治理、生态修复及加强监管等方面提出地下水饮用水源污染防治对策。 相似文献
62.
企业环境监测工作的现状及发展初探 总被引:1,自引:0,他引:1
剖析了企业环境监测工作的现状,明确了企业环境监测工作的工基本立足点,在面临大中型国有企业主业副业剥离的情况下,对企业环境监测机构在市场经济条件下如何面对自己的生存进行了探讨,并提出企业环境监测工作的发展设想。 相似文献
63.
上海市生活垃圾的处理现状及对策探讨 总被引:6,自引:0,他引:6
阐述了上海市目前生活垃圾收运及处理情况,对2000年上海生活垃圾的产量作了预测,对生活垃圾处理对策的分析中,提出技术,资金和管理等方面的支持条件。 相似文献
64.
65.
Dominance relationships in solitary species may be an important factor in the maintenance of long-term, stable relationships
among territorial neighbors. We examined the mediation of intraspecific interactions in a solitary, territorial kangaroo rat,
Dipodomys heermanni, and tested whether unfamiliar kangaroo rats establish a dominance hierarchy and then decrease aggression and increase communication
(via footdrumming and sandbathing) after initial interactions and the establishment of a social structure. Results revealed
that both dominance hierarchies and familiarization with particular individuals are likely to mediate social interactions.
After only one pairing per dyad, an almost linear dominance hierarchy emerged, which became perfectly linear after a 90-min
familiarization period. During the course of subsequent interactions between dyad partners, fighting decreased and non-agonistic
communication increased. Dominant kangaroo rats sandbathed at higher rates than subordinates, possibly to deposit scent to
advertise competitive ability, whereas subordinate kangaroo rats footdrummed from inside the burrow, which seemed to indicate
an unwillingness to interact. We suggest the kangaroo rats use a conditional strategy when deciding to fight (be dominant)
or withdraw (be subordinate) by employing different modes to communicate status and minimize the potential risk of injury
during unnecessarily prolonged fights. 相似文献
66.
从宿迁市木材工业粉尘污染控制现状存在的问题入手,分析了木材工业企业粉尘污染的原因,提出了控制粉尘污染的若干建议。保护环境是实现木材工业可持续发展的必然要求,必须从工艺、技术和装备方面控制生产过程中的粉尘,使作业环境和大气污染排放达到国家环境保护标准和法规的要求。 相似文献
67.
Earlier studies on fault diagnosis of the pipeline and pump unit systems (PPU) relied mainly on independent equipment analyses, which usually lead to false alarms because of the loss of information fusion. The aim of this study is to utilize the status coupling relationship to improve fault detection sensitivity and reduce false alarm rate. A real-time status identification of related equipment step is added between capturing abnormal signals and listing out diagnosis results. For example, when the pipeline pressure fluctuation is found abnormal, a status analysis of pump units is performed immediately, if the pump units are proven to be operational normally, then the pipeline leak alarm is acknowledged valid. The logical reasoning algorithm is used to capture abnormal conditions of pipeline pressures. The pump unit faults are captured by combining information from multiple sources. Field applications show that the proposed method significantly improves the PPU fault detection capability on fault detection sensitive and accuracy. 相似文献
68.
A new benthic index, named Daphne, is proposed for the Northern Adriatic coastal area, near the Po river delta. It is based on six characteristics of the community that do not require in-depth taxonomic expertise: number of mollusc species, % of bivalves, % of polychaetes, abundance of the opportunistic species Corbula gibba, % of amphipods and number of 'typical mollusc species' that are individuated by multivariate analysis. The application of the index in selected stations along a gradient of decreasing disturbance shows that it is simple to use in regular monitoring campaigns and that the results are consistent with environmental quality data in the special conditions of this area subjected to considerable river runoff. The index can be used in addition and as a complement to more widespread indices (such as M-AMBI); a comparison of the two indices performance is discussed. 相似文献
69.
黑龙江省开展农村环境质量监测的现状分析及几点建议 总被引:1,自引:0,他引:1
开展农村环境质量监测已成为国家环境监测的一项重要工作,监测工作正由试点监测逐步过渡到例行监测。本文根据近4年的试点监测数据,介绍了黑龙江省农村环境质量监测情况及质量现状,指出当前监测工作中存在的问题,并为今后全面开展监测提出了有针对性的建议。 相似文献
70.