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In this paper, predator-prey systems with periodic impulsive effect concerning pest control are proposed through biological control and chemical control.
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摘要本文通过生物控制和化学控制提出了具有周期脉冲效应与害虫控制的捕食系统。 |
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In this paper, principle of EMS and carbon fiber property are introduced briefly, development and applications of carbon fiber in electromagnetic shielding composites are discussed expatiators.
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摘要本文简要介绍了电磁屏蔽的原理和碳纤维的性能，分析、论述了碳纤维在聚合物基电磁屏蔽材料中应用研究的主要形式。 |
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In this paper, progress of studies the fragrance of rice was summarized involving the mechanism of sniffed scent, chemical composition, appraising method, inheritance of aroma, effect of rice varieties and machining process and condition of storage, rice
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摘要笔者综述了稻米的嗅香机理，香味的化学成分、鉴定方法与遗传，稻米的种类、加工过程、储藏条件对稻米香味的影响，以及育种研究方面的进展。 |
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In this paper, recent progress in seismological, geochemical and petrological studies of the continent-tal lithosphere studies are reviewed.
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摘要从地震学、地球化学、岩石学等不同学科的角度，对大陆岩石圈研究进展做了简要介绍。 |
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In this paper, regarding the analysis of stability factors of Majiatian tailings fill dam, namely regional geologic structure, rock-soil body of dam foundation, poor geology phenomenon , leach consolidation and chemical consolidation of tailings, seepage
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通过对马家田尾矿库区域地质构造、库区不良地质观察、尾矿淋滤固结和化学固结、坝体渗透水和库区特大洪水等因素对马家田尾矿堆积坝体稳定性影响的分析，初步论证了坝体尾矿砂土的地震液化、渗透破坏、坝肩滑坡使坝体失稳和洪水漫顶的可能性，以及尾矿淋滤固结和化学固结作用有助于坝体的稳定性。 |
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In this paper, regarding the fly-field of the airfield was the researching objects. by system simulation method, a model for evaluating the aircraft taking-off and landing ability was introduced.
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摘要以机场目标的飞行场地为主要研究对象，通过作战仿真的手段，建立了机场目标起降能力评估模型。 |
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In this paper, reinforced concrete beams with different water/cement ratios and defects were used to study corrosion of the effect on the beam behavior.
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摘要本研究针对不同的混凝土梁试体，探讨其腐蚀后之力学行爲。 |
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In this paper, relation between the dynamic evolution feature of gravity field and strong seismicity is studied, the result shows that, regional gravity field variation enjoys inhomogeneity of spatialand temporal distribution and gravity change in differe
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摘要通过研究南北地震带及青藏块体东部地区多年来的重力场动态演化特徵及其与强震活动的关系，发现区域重力场变化既具有时空分布的不均匀性和重力变化分区现象，同时又具有与活动断裂构造密切相关并与地震孕育发展有著内在联系的特徵。 |
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In this paper, research progress in the heat resistant modification of phenolic resin was introduced.
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摘要对酚醛树脂的耐热改性研究进行了综述。 |
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In this paper, research progress in the studying of high efficiency halogenation agent in recent years was reviewed and the application of a series of high efficiency halogenating reagents in halogenating substitution reaction and halogenating addition re
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本文对近年来在高效卤化试剂研究方面取得的进展进行了综述，介绍了系列高效卤化剂在卤化取代反应、卤化加成反应等方面的应用。 |
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In this paper, resonant characteristics of the meander-line dipole antenna depended on times of meanders, the height of meanders and the angle of meanders are analyzed.
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摘要本文研究了由矩形弯折线构成的偶极子天线的谐振特性，分析了弯折线偶极子天线的弯折次数、矩形弯折的高度以及弯折角度等参数对天线谐振特性的影响。 |
