摘要：Marxism was spread into Vietnam by patriotic intellectuals from the 20s of the 20th century and still exists until today. The presence of Marxism in Vietnam through such a long history is enough to prove its importmlce and strong influence in the socio-political life of Vietnam. First of all, Marxism is closely related to the movement of national liberation revolutions in Vietnam from the 20s to the mid 70s of the 20th century： Marxism, with its outright revolutionary nature, had most adequately and effectively met the urgent needs of national liberation revolutions in Vietnam at that time, and at the same time evoked the fierce belief of patriotic revolutionists in a noble ideal--tJle ideal of communist society, and encouraged them to devote themselves to national liberation revolutions. It can be said that Marxism has become the soul of national liberation revolutions in Vietnam; hence, the victory of such revolutions in the mid 70s of the 20th century is also the victory of Marxism in an Eastern country that was very obsolete then. Furthermore, Marxism is also associated with the reforming of old society and building of new society--the socialist society in Vietnam： after winning national independence and unification for the country in the mid-70s of the 20th century, Vietnamese patriotic revolutionists posed the question of＂What new model of society should be built in Vietnam to match the country＇s history context？＂ This question is not only related to the fate of of everyone, but also related to the fate of Vietnamese people as a whole. Marxism had brought to patriotic revolutionists and all Vietnamese people a very clear answer： the socialist society （the first phase of communist society）, where there will no longer be capitalist ownership, no people exploiting people, no rich and poor, from each according to his ability, to each according to his needs, all resources are of common ownership, etc Thus, from 1975 to 1986 （the subsidy period in Vietnam）, the Comm

摘要：In the early twentieth century, Marxism was propagated into Vietnam through patriotic intellectuals. After the propagation into Vietnam, Marxism not only influenced national liberation movements, but also profoundly affected scholars, particularly scholars of social science. In fact, many of well-known Vietnamese scholars have relied on Marxism’s theory of social existence and social consciousness, infrastructure and superstructure, practical concept, concept of class struggle, etc. to comment on poetry, history, language, geography, philosophy, etc. In other words, the scholars have applied Marxist methodology to explore and study cultural and social life in Vietnam; and in that way, a generation of Marxist researchers in the field of social sciences has been formed. After the renovation of the country, the Government of Vietnam has implemented its policy of openness and international integration, and scholars have been therefore able to receive many other Western ideals and cultures, and the Marxist methodology was not the only one used in social science research. Consequently, some people expressed their skepticism about the role of Marxist methodology in academic research in Vietnam, even completely denied the historical significance of Marxist methodology to the academia in Vietnam. This article is intended, through Vietnamese Marxist scholars, especially the ones in the field of social sciences prior to 1986 （i.e., prior to the renovation of the country） to demonstrate the historical significance of the Marxist methodology to the Vietnamese academia. It is clear that the penetration of the Marxism and the Marxist methodology into Vietnam have created a revolution in the field of academic research （primarily in the field of social science）. It has promoted academicresearch from conservative toward innovative, from traditional to modern. With the presence of the French colonialism as well as the French culture, the Marxism and the Marxist methodology helped Vie

摘要：A structure-based microstrip passband filter with the center frequency of 2.6 GHz was put forward by using double-mode resonator based on defected ground structure （DGS） technology. A double-mode coupling resonator combined with DGS structure was used to achieve the resonance frequency and the filter size. CST microwave studio was used to optimize the attenuation performance to get the filter parameters. A structure-based passband filter was fabricated. Simulation is consistent with the measurement. Performance shows that the proposed filter could be suitable for the time division-long term devolution （TD-LTE） microwave systems at 2.6 GHz.

摘要：当前,食品广告在快速发展过程中,各种伦理失范现象层出不穷。为了更好地解决食品广告伦理失范问题,参照已有的关于食品广告、广告伦理失范问题研究,结合当下新的营销环境和技术环境,运用广告伦理学相关知识,通过具体案例从低俗营销、跨界营销、虚假信息、不正当竞争等四个维度重点分析食品广告活动中的伦理失范现象。在传统观点基础上,运用新媒体技术的视角对食品广告伦理失范原因提出针对性措施。力求在新的环境下既能运用常规策略解决共性问题,又能规范利用新技术解决食品广告所出现的新问题,以促进食品广告行业良好发展。

摘要：汽车工业快速发展以及广泛的消费利用引起了废旧轮胎的激增,废旧轮胎具有显著的资源环境属性而备受关注,如何提高轮胎的可回收性、改善其生态设计是解决废旧轮胎问题的关键.本研究采用统计熵与等级确定规则的模型,根据轮胎初始态与回收最终态的差异程度以及主流的处理处置技术,首次建立了轮胎可回收性评估模型,收集典型轮胎的理化组成,评估了现有轮胎的可回收性.结果发现,相比其他产品,轮胎因其显著的能源化比例,而可回收性较高,从高到低排序大体为卡车轮胎、轿车轮胎、货车轮胎、公共汽车轮胎、越野车轮胎,5种汽车应用类型轮胎的可回收性为82~93%bit-1.相关研究结果为轮胎的资源化、能源化工艺的设计提供了指导,建立的方法对于轮胎生态设计及行业的节能减排提供了参考.

摘要：该文以高压工程应用如人造水晶为背景,为解决析出结晶影响压力测量的问题,设计了以溅射式锰铜箔片为弹性元件的准静态高压传感器,较之线圈式锰铜压力传感器,该新型传感器具有响应可靠,适应环境能力强的优点。采用了筒紧加自紧处理的的筒体结构,提出了该结构的弹性强度计算公式,设计了引出导线的密封结构,研究确定了预灌装的承压介质,进行了该新型传感器的性能试验,得到了主要的静态性能指标。

摘要：基于目前的制造工艺,现有高压交流断路器的参数水平尚不能同时满足日益增长的电网短路电流水平引起的保护要求及技术经济合理性。为此提出了一种新型结构大容量高压断路器的设计方案,该断路器利用耦合度高、正常工作状态下能耗小的紧耦合空心电抗器,结合断路器使用,能有效实现自动均流和限流功能,从而成倍增大断路器承受额定电流和短路电流的能力。对其工作原理进行了理论分析及仿真计算,并通过动模试验验证了其可行性。此外,参考GIS的设计,提出了采用金属外壳封闭气体绝缘的大容量开关装置的工程化实施方案。

摘要：行波电子直线加速器运行时加速管腔体因铜损会产生不均匀的热变形和腔频率偏移。因无法获知腔频率的准确偏移值,设计加速管冷却系统的一种经验设计方法是控制管体温度离散度在3℃之内。提出并实现了一种以直接控制加速管腔体频率离散度为设计目标的方法。采用插值蒙皮曲面造型理论,依据温度场和热变形的有限元仿真结果,高精度重建出变形后的腔体3维实体模型。将其导入到电磁场分析软件微波工作室,解算出不均匀温度分布造成的热变形引起的各腔频率偏移,实现了热-结构-电磁场的耦合分析。以加速管腔体频率离散度最小为设计目标,获得冷却系统优化参数。相对于经验设计方法,可大大减小冷却水流量和水压差,节约运行成本。

摘要：智能材料由于其响应速度快、特性参数易于调控、能耗小等特点,而被越来越多的用于振动控制系统中。针对细长轴类零件外圆车削加工中的颤振现象,研制了基于智能材料——电流变液的车削颤振减振装置,理论分析表明:不同切削条件下,获得最佳减振效果的控制电压并不相同。由此,开发了基于电流变材料的车削颤振模糊控制系统,进行了半主动模糊控制试验。试验结果表明:在不同的切削状态下,该模糊控制系统均可以自适应地调整控制电压,减小切削系统的加速度响应,抑制车削颤振。

摘要：为了解决扫频过程中隔振器不能很好地隔离扫频频率在0Hz和固有频率之间的平台基座惯性力的干扰,提出一种双级驱动主动隔振系统的可调反共振频率控制器。对双级驱动主动隔振系统的运动学模型、可调反共振频率控制器及参数设计等进行了研究。首先,根据设计的双级驱动主动隔振系统建立其运动学模型。接着,基于系统的反共振频率特性提出了可调反共振频率控制器及其参数设计。然后,分析可调反共振频率控制的隔振性能。最后,搭建实验平台进行实验验证。实验结果表明:从0到初始反共振频率,闭环传递率小于-15 dB。此外,通过改变控制器的参数,附加的反共振频率可以在0 Hz和初始反共振频率之间调节。且在附加反共振频率附近,闭环传递率小于-30 dB。利用该控制器,有效载荷的扰动幅度从4 mm·s^(-1)衰减到0.5 mm·s^(-1),平台基座的冲击扰动降低了87.5%。双级驱动主动隔振系统配合可调反共振频率控制器可以通过跟踪扫频干扰实时调整反共振频率点,可应用于半导体制造业超低振动要求的扫频环境,达到良好的隔振效果。