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To enrich resource of species, 105 arbor species (25 genera, 15 families) were introduced to the hilly and gully areas on Loess Plateau.


The optimization model used to compute the number of virtual connections in a manycategory traffic in an ATM network component is useful in estimating the resource of nodal equipment and communication channels.


The developed method provides the permanent control over the appearance of mechanical injuries in metal constructions under loads, the location of these defects, and the estimation of the resource of their safe exploitation.


The violation of the general covariance is proposed as a resource of the gravitational dark matter.


The operating resource of the XeCl emitter is found to be (35)×104 pulses and depends strongly on the pressure and composition of the active medium.

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 The author gives an evaluation on thr resource of Trichiurus haumela from thr viewpoint of mathematioal patterns so as to discuss the adjustment of fishing fish age group structure and the approach of rational exploitation. The results are as follows: Growth Parameter:W=2176g K=0.274 t_0=0.67 Naturel Mortality Coefficient:M=0.44 Fishing Mortality Coefficient:F=0.1 (early part of the sixties) F=2.09 (later part of the seventies) Maximum Sustained Yield MSY=461×10~3kg Fishing Effort f_(max)=3820×10~2 operation... The author gives an evaluation on thr resource of Trichiurus haumela from thr viewpoint of mathematioal patterns so as to discuss the adjustment of fishing fish age group structure and the approach of rational exploitation. The results are as follows: Growth Parameter:W=2176g K=0.274 t_0=0.67 Naturel Mortality Coefficient:M=0.44 Fishing Mortality Coefficient:F=0.1 (early part of the sixties) F=2.09 (later part of the seventies) Maximum Sustained Yield MSY=461×10~3kg Fishing Effort f_(max)=3820×10~2 operation day (60 horse power motor sailing boat) If K=2.0,initial age for fishing 1 year old.Yiold/Roplacement will be an increase by 25%;K=2.0.initial age for fishing 2 years old,then Yield/Replacement: an inerease by 20%. With the view to adjust fishing fish age group structure and exploit the resource rationally,it is more reasonable to restrict the catoh of towing net fishing within 1.5 years old age fish.  本文应用数学模式对带鱼进行评估分析,并探讨调整捕捞结构,合理利用资源的途径。结果为;生长参数:W_∞=2176克,K=0.274,t_0=0.87。自然死亡系数:M=0.44捕捞死亡系数:F:在六十年代前期为1.01,七十年代后期为2.09。最大持续渔获量:MSY=922万担。相应的捕捞力量f_(max)=3829×10~2作业日(60马力机帆船)根据当前的捕捞状况,若F=2.0时,开捕年龄由0.5龄推迟到1龄和由1.0龄推迟到1.5龄。则单位补充量渔获量 Y/R 分别可提高25%和20%。当前调整捕捞结构、合理利用资源的途径以限制夏、秋季拖网渔船捕捞1.5龄以下的带鱼比较合宜。  The paper treats of the particularities of water resources of the Yellow River and conditions for development and utilization, emphasis having been laid on the analysis of development and utilization of water resource of the Yellow River and the economic returns gained since liberation, as also the outstanding problemsat present. In accordance with the strategy of development of different branches of the national economy in the basin, and the present status of utilization of water resource, a prediction... The paper treats of the particularities of water resources of the Yellow River and conditions for development and utilization, emphasis having been laid on the analysis of development and utilization of water resource of the Yellow River and the economic returns gained since liberation, as also the outstanding problemsat present. In accordance with the strategy of development of different branches of the national economy in the basin, and the present status of utilization of water resource, a prediction has been made regarding the prospects of rational development and utilization of water resource of the Yellow River.  本文论述了黄河水资源的特点及开发利用条件,着重分析了解放以来黄河水资源开发利用所取得的经济效益和当前存在的突出问题。根据流域内国民经济各部门发展战略,结合水资源现状利用情况,预测了黄河水资源合理开发利用的前景。  This paper described the contents and the theoretical and realistic importance of compromising analysis. The conceptual pattern and general mathematical model (MAOM) are established here. The conceptual pattern consists of three blocks, or decomposing block which is composed of areadecomposing and objectivedecomposing, available water resources block which is closely related to interior structural analysis of regional water resources, and compromising analysis block. The aim of decomposion is to... This paper described the contents and the theoretical and realistic importance of compromising analysis. The conceptual pattern and general mathematical model (MAOM) are established here. The conceptual pattern consists of three blocks, or decomposing block which is composed of areadecomposing and objectivedecomposing, available water resources block which is closely related to interior structural analysis of regional water resources, and compromising analysis block. The aim of decomposion is to transfer the problems which are very complicated or even unsolved into a lot of subproblems which can be solved. The main tasks of compromising analysis block are to develop the mathematical model and determine the appropriate compromising methods, and to give the use structure of regional water resourcess studied. The general mathematical model of compromising analysis is set up in the third part, which consists of the analysis of development objectives and constraints. The model is a multiareamultiobjective planning model. Compromising program is one of the effective methods used to solve the model, which is based on the best geometric notion. Finally, according to the principles of compromising analysis described, we made a study of the distribution of Changji Prefeture's water resources of Xingjiang Uygur Autonomous Regions, and got its nearfuture and longrange rational use structure of water resources by applying goal programming method to solve the mathematical model.  本文建立了区域水资源协调分析的概念模型和通用多区域多目标数学模型(MAOM),并结合新疆昌吉州的具体情况,运用目标规划法进行求解,确定了昌吉州近期和远景的水资源合理利用结构。   << 更多相关文摘 
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