Business Environment and Resource Allocation Based on the Perspective of the National Value Chain

China is actively upgrading its industrial structure through industries transferring between developed and undeveloped areas; however, the overall level of the national value chain is still not high, and the asymmetric competition pattern between the upstream and the downstream has not been broken. Therefore, this paper establishes a competitive equilibrium model for the production of manufacturing enterprises, with factor price distortion, under the condition of constant returns to scale.The au...     

追求爱情和幸福的“叛女”——安娜·卡列尼娜悲剧形象的典型意义

该文通过分析《安娜·卡列尼娜》主人公安娜·卡列尼娜追求真挚爱情不得并被虚伪、黑暗、冷酷的沙俄上流社会所吞噬的悲剧意义,展示列夫·托尔斯泰对社会本质敏锐的洞察力与精湛的人物表现技巧。     

镍钛合金加强梁的有限元法

就含镍钛合金丝的梁的静力及动力问题，描述了镍钛合金丝与玻璃纤维树脂基体的相互作用，进行了镍钛合金丝和加强梁受温度、外载作用下力学行为的分析，并给出形状记忆合金复合材料的有限元分析方法     

应用人工神经网络研究新型喷水室的热工性能

利用人工神经网络优良的非线性映射能力 ,设计了一个三层前馈式神经网络用于预测流体动力式喷水室在不同工作条件下的喷水量 .预测结果和实验结果相比 ,吻合较好     

Preparations and Properties of Perfume Microcapsules

With Perfume as core and gelatin-gum arabic as mem-brane,a series of microcapsules were prepared by meansof complex coacervation at various technical conditions.Their interior and outer diameters and membrane thick-nesses were measured and the effects of preparation tech-niques on microcapsule properties were revealed.     

制备工艺对农林用高吸水材料凝胶强度的影响

以工业废胶为原料，通过研究交联反应时交联剂的体积分数、温度、时间及水解反应时碱溶液的质量分数、温度、时间等工艺条件制备出交联的聚丙烯酸盐类高吸水材料，通过测定高吸水材料吸水后凝胶在一定应力下的形变大小，作形变-时间曲线比较不同制备工艺条件下所得高吸水材料的弹性模量大小，从而相对表征高吸水材料的凝胶强度大小。     

深化改革,提高农业院校机械基础实验室管理水平

本文分析了农业院校机械基础实验室的地位和作用,阐述了目前机械基础实验室建设和管理中存在的问题,提出了通过加大资金投入、积极进行实验室改革、提高实验技术人员素质和开放实验室等举措来提高实验室整体水平的对策与措施。     

Transcriptome analysis of Sinorhizobium meliloti nodule bacteria in nifA mutant background

Sinorhizobium meliloti is one genus of gram-nega- tive soil bacteria that can fix atmospheric nitrogen in root nodules of its symbiotic leguminous host plants[1]. Specific recognition and progressive differentiation ofboth bacteria and host cells are requ…     

Collapse and revival in Aharonov-Bohm electron interference experiment

It is shown that in the presence of even and odd coherent state field the collapse and revival (CR) phenomenon can occur in Aharonov-Bohm electron interference, which is closely related to the quantum fluctuation of the field. CR phenomenon reflects the effects of quantum noise of the field on the dynamic behaviour of electron interference. For coherent state field and number state field there is no CR to occur, which means that CR is due to both wave and particle aspects of the field.     

傅立叶变换的计算机可视化表达

介绍了一种可视化的离散傅里叶变换教学课件，该课件以文字说明和图形的方式，对ＤＦＴ性质进行演示和说明，可用于课堂教学和实验教学