模特排时法在生产动作中的优化应用

随着自动化水平的不断提高,现代制造业的生产效率在一定程度上受到人工操作效率的影响,应用模特排时法(MOD),针对机械加工生产线中操作工的行为动作开展分析,寻求降低劳动强度、改善生产效率的途径。

中小企业生产运作管理存在的问题与对策

我国市场经济正处于高速发展阶段,随着经济全球一体化的到来,对企业的发展既是机遇也是挑战,企业之间的竞争也日趋激烈。如何在复杂的市场环境下谋取生存,是摆在企业管理者面前的一大难题。当前阶段,我国中小企业数量众多,产出规模较小,企业管理者必须加强企业的生产运作管理,以此提高中小企业抵御风险的能力。因此,通过对中小企业生产运作管理存在的问题进行充分研究,有利于帮助中小企业提出应对措施,推动其经济效益的持续增长。

The energy identity of mountainous areas:the example of Greece

Mountainous areas have been long recognized as particularly important for the planet and sustainable mountain development is a global priority. In order to improve the socioeconomic development perspectives of mountain societies, efficient and well-targeted energy strategies should be formed. An important step towards this direction is adequate understanding of local conditions and specific features that affect energy sector. This procedure allows the inclusion of "locality" in energy planning and so, decentralized energy production is facilitated. The present study attempts to determine the particular energy identity of mountainous areas. Greece, which is the second most mountainous country in the EU, has been selected as a case study. Essential features of the mountainous space have been selected, namely altitude, inclination, remoteness, lack of productive activities, old buildings/vernacular architecture, in order to explore their interrelation with the energy sector. Based on literature review and research findings the interaction between mountainous character and energy is outlined. Therefore, a framework of the characteristics of mountain energy identity is composed, which can provide support to the formation of specialized energy policy for mountainous areas. Some of the main findings of the present study include the significantly increased energy loads of mountainous areas, the abundance of renewable energy potential in high – altitude areas, the vulnerability of mountain societies to energy poverty and the difficulties in sitting energy projects in the restricted usable space of mountains. Since the literature regarding mountains and energy is rather poor the present paper aspires to be a step towards highlighting the importance of energy issues for mountain areas and societies. By determining the features of mountain energy identity energy planning in high – altitude areas and so, helping make energy planning more effective, such research works can be parts of sustainable development strategies for mountainous areas.

Market Information on Sourcing Cellulosic Feedstock for Biofuel Production in Northern Plains Region of the United States

This study investigates crop residue availability within 100 mile radius of a potential biorefinery in Southeast North Dakota. Due to the lack of market information on biomass residue supply, we conducted farm focus group survey sessions and empirical field studies to evaluate farmers＇ willingness to supply crop residues and timeliness of harvesting. Using a GIS （Geographic Information Systems） application, we locate residue supply areas and numerically show that there are enough crop residues to meet the biorefinery＇s supply needs. Our evidence from farm focus group shows that farmers may not be willing to sell their crop residues because of concerns for labor availability and soil fertility losses. Farmers＇ decisions to supply crop residues depend on the willingness of a biofuel firm to offer them a contract and ensure price stability. Farmers are unwilling to take any risk in supplying crop residues and they prefer to transfer ownership of residues immediately after harvest and have an external party bale, store and transport the goods. The biofuel firm requires crop residues be collected dry to prevent mold. This will challenge Northern Plains farmers who wait to collect stovers prior to winter.

Dependence of Consumption Volume on the Labor-Force in One-Productive Models of Economic Dynamics

In the work one-productive model of economic dynamics the labor-force involved in production is investigated the case when or function with constant elasticity of substitution （CES） is studied. is considered. The dependence of the consumption volume on production function coincides with the Cobb-Douglas function

Study on the Self-supporting Logistics Mode based on B2C E-commerce Enterprises

Taking B2C E-commerce enterprises as the center, it can be divided into a set of logistics activities upstream supply chain logistics producer to B2C e-commerce enterprises, and the B2C e-commerce enterprise logistics to client consumer, and the paper focuses on the study of self-supporting logistics for the E-commerce enterprise. According to the development status of current B2C electronic commerce enterprise in our country and logistics, the paper study B2C electric business enterprise how to correctly choose the logistics mode and how to promote the business logistics operation level.

Highly Effective Brushless DC Motor in Which Unidirectional Current Flows in

Authors developed a highly effective brushless DC motor with a simple operation principle. If the operation principle of the motor is simple, a drive circuit will also become simple and its production cost will be lower. From the above fact, Minato motor was noticed. In this motor, a unidirectional current flows in the electromagnets. In other words, unidirectional windings are used. In this motor, only strong repulsive force is utilized when a permanent magnet of a rotor and an electromagnet of a stator are adjacent. Hence, torque constant becomes higher and the efficiency of the motor is high. However, an effective value of the electromagnetic current increases because a large current flows in a short period. Therefore, copper loss increases and the efficiency of the motor decreases. In order to solve above defects, a new motor is proposed. From the experiment, it is clarified that the efficiency of the proposed motor is higher than that of the commercial motors.