共有制:国有森工企业森林资源产权制度创新理论探索     

王兆君 《林业科学》2007,43(9):105-110

针对国有森工企业森林资源管护经营责任制存在的问题,提出建立国有森工企业森林资源资产共有制.国有森工企业森林资源资产共有制是与社会化生产和市场经济相适应的财产主体多元化、运作社会化的所有制形式.承认劳动力产权是建立国有森工企业森林资源资产共有制的必要条件,共有制是社会主义公有制的有效实现形式,是实现林区职工共同富裕、国有资产的保值增值和保护森林生态安全的制度保障,也是森工企业走出困境、提高经营效益的有效途径.  相似文献   

Mechanism of Human-Machine Cooperation Based on Agent and the Role of Human Being     

HUANG Xi yue  LIU Wei hong  MA Xiao xiao  ZHU Lei  HUANG Min  NI Lin 《保鲜与加工》2002,(9):32-35

Continuous industries CIMS is a complex system consists of human and machines under certain environment. It has been proved that there is limitation to only pursue high degree intelligent system, so the idea of human machine can be used to research CIMS under system theory viewpoint. Combining advanced multi agent technology and theory, a human machine cooperation mechanism with agent as the middle medium is presented which can provide a more flexible information mutual interface. In addition, the roles of human and machine under this new mechanism are analyzed.  相似文献   

Angle factors between surfaces in a radiant air-conditioned room   总被引：1，自引：0，他引：1  

Zheng Dexiao  Li Nianping  Yang Changzhi 《保鲜与加工》2015,(1):55-60

Angle factors between enclosure structural surfaces, or between human body and enclosure structural surfaces are the basic parameters to calculate radiant heat transfer in a radiant air-conditioned room. At present, the angle factors between the human body, radiant panels, windows and doors are usually quite difficult to solve. Therefore, we derived the angle factor expressions of two rectangular surfaces in the positions both mutual perpendicular and mutual parallel by using curve integral formula of angle factor, instead of using conventional surface integral formula. Meanwhile, angle factors between human body and enclosure structural surfaces by simplifying a seated person as a rectangular solid were acquired. The results were shown to be efficient and practical, and were free from the limitation of envehpe sizes and relative positions.  相似文献   

人体头发中锌含量分析研究   总被引：1，自引：0，他引：1  

黄高明  孙林超 《农产品加工．学刊》2007,(11):87-89

锌在人体14种必需微量元素中排在最前面。锌在人体内具有重要的功能,它对机体生长发育,创伤愈合,免疫预防具有重要的作用。采用火焰原子吸收分光光度法,测定不同年龄阶段人发中的锌含量,并对测定结果进行分析,为科学补锌提供依据。  相似文献   

基于GIS和PCA的植被空间分布特征及影响因素分析     

王晓宁  卢鹏  甘桂春 《林业调查规划》2015,40(2)

以贵阳市花溪区为研究区,基于GIS空间分析技术,分析研究区内12种植被类型受10个因子的影响规律,定量描述植被空间分布状态。通过PCA(Principal Components Analysis)分析,提取了人类活动影响因子、地理因子和水源因子3个综合指标,可以反映所有影响因子81.13%的信息。随着人工促进更新和人工造林已经成为研究区主要营造林方式,人类活动已经成为影响植被分布的第一因素。  相似文献   

Impact of natural and human selection on the frequency of the F1 hybrid between cultivated and wild pearl millet (Pennisetum glaucum (L.) R. Br.)     

E. Couturon  C. Mariac  G. Bezançon  J. Lauga  J.-F. Renno 《Euphytica》2003,133(3):329-337

In the Sahel, pearl millet yields are affected by the proportion of hybrid phenotype plants resulting from genetic mixing between domesticated and wild forms. Man counteracts this mixing by applying a production method, the efficiency of which is quantified in this study. Under experimental conditions, cultivated and wild pearl millet were hybridised in order to obtain cultivated pearl millet seeds including a known proportion of F1 hybrids tagged by two different allozymes. These seeds were sown in the field and the cultivation was conducted following practices common in the Sahel. The evolution of the survival rate of plants and the frequency of hybrids were followed over several stages during the season: sowing, germinating, emergence, thinning, flowering and maturing of the seeds. Owing to plant mortality in the experiment, the average tendency was a hybrid frequency that decreased steadily in the first part of the growing season from 42% during germination, to 37% at emergence. It then fell to 17% after the thinning of the plantlets by the farmer. At the end of the cycle, after thinning, only 11% of mature plants were hybrids. Thus, under the combined pressures of natural and human selection, the frequency of hybrids in the field declined drastically. In interaction with natural pressure, the farmer's practices of selection of seeds, sowing in pockets and thinning have the combined effect of heavily selecting the cultivated genotype and limiting without completely preventing the introgression of wild pearl millet genes into the cultivated genome. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

A Fuzzy Controller with Simulating Human Intelligent Control and Its Simulation Analysis     

SU Yu gang  ZHANG Bang li 《保鲜与加工》2002,(4):55-60

In the intelligent control system with microprocessor controlling, the development of embedded software requires some simple and practical intelligent control algorithms. The algorithms can not only make the control system's performance good, but also meet the demands of real time control. Aim at the problem, it is presented that a fuzzy controller with simulating human intelligent control. The structure , control algorithms and the simulation results of the controller are given. The simulation and application show that the fuzzy controller with simulating human intelligent control has many advantages such as fast response, less overshoot, good robust. The design of the controller does not need the accuracy math model of controlled object.  相似文献   

Dynamic Arrangement of Corporate Property Rights and the Equilibrium Analysis of Corporate Surplus Allocation     

WANG Bing-jie GONG Xian-wen 《保鲜与加工》2004,(5):143-146

According to Coase and Alchian's definition ,the corporation is a contract consisting of variety essential factors.The essential factors of the firm can be separated into human capital and non-human capical. The owner of the factors will be confronted with rearrangement of the property rights when forming a contract. At the same time, the firm is a special contract which different from other short-term contract. Therefore, its property rights arrangement is dynamic and its surplus distribution is dynamic ,too. By analyzing the arrangement process of the property rights and surplus, the paper draws a conclusion about distribution equilibrium.  相似文献   

Effect of Moisture on Indoor Thermal Environment     

FENG Y  LIU Cai-feng 《保鲜与加工》2001,(1):6-9

In the past, the temperature was used as the sole quota to control the indoor thermal environment in hot summer and cold winter areas of China, but a major quota, the relative air moisture, was often ignored. In this paper, the effect of relative air moisture on indoor thermal environment is analyzed. The results show that the energy consumption can be reduced and comfortable thermal environment can be provided under natural condition by regulating the indoor moisture.  相似文献   

A NEW METHOD FOR AMELIORATING INDOOR THERMAL ENVIRONMENT BY DEHUMIDIFYING     

Chen Qigao 《保鲜与加工》1993,(4)

The climate in the region of the Yangtze River is sultry in summer and wet and cold in winter. The conventional building measures are shading in summer and insulating in winter,which have heen gotten some effects. Becasue the sultry,wet and cold sensation still affect, the indoor thermal environment can not get an ideal improvement. This paper shows that the new method by dehumidifying is the most effective and the most economic.  相似文献