浅谈“工业产品CAD”技能竞赛选手的选拔方法

近几年,国家对职业教育的发展更加重视,教育部制定了《全国职业院校技能大赛三年规划(2013-2015年)》,确定了2015年仍然要举行"工业产品CAD"技能竞赛项目。如何对"工业产品CAD"技能竞赛选手进行选拔?就成为竞赛准备的关键。笔者作为辅导教师,曾辅导学生连续三年获该项目国赛二等奖,对如何选拔优秀的种子选手,有着自己的心得,现与大家一同分享。

肉桂的组成及其在化妆品中的应用

介绍了肉桂的基本情况及主要化学组成,肉桂含有挥发油、黄酮、多糖、萜类、木脂素、香豆素、矿物质等多种成分,其中挥发油为其主要成分;总结了肉桂与化妆品行业相关的抗氧化、抑菌、美白、皮肤保护等功效;分析了肉桂在化妆品的应用现状及安全性,并提出了肉桂在化妆品中的应用展望。

eBay平台吹响中国汽配品牌集结号，汽配出海前景广阔

2019年12月3日,第十五届法兰克福上海国际汽车零配件、维修检测诊断设备及汽车用品展览会在上海国家会展中心盛大开幕,此次展会吸引了来自18个国家和地区的超过6000家参展企业,汇聚了大量汽配龙头企业和品牌。作为唯一参展的跨境出口电商平台,eBay召集优质卖家开启“灯塔计划”观展采购活动,不仅有来自中国的卖家,更有来自泰国、马来西亚的国外卖家加入eBay“灯塔计划”国际采购团。

可食性膜在食品保鲜中的应用现状及研究进展

在食品保鲜领域,可食用天然抗菌保鲜膜是一种重要的可生物降解膜,具有易降解、成本低、来源广等特点。介绍了多糖膜、蛋白膜和脂质膜3种可食性涂膜在食品保鲜中的应用现状,综述了复合成膜技术、纳米颗粒制备技术及添加植物精油在制备可食性涂膜中的研究进展,以期为可食性包装材料在保鲜领域中的进一步研究提供参考借鉴。

Current Status and Development Strategies of Chinese Cosmetic Industry

Current status and existing problems in the Chinese cosmetic industry areanalyzed from the aspects of industry scale, technology and management level, R&D investment andhuman resources. Strategies to promote the industry are also put forward, such as increasing entrybarrier to optimize industry structure, tightening regulatory controls to improve quality assurance,fostering innovation and actively exploring modes of collaboration, and training more technical andmanaging professionals.

Transmission Electron Microscopy Observation of Different Callus Structures in Heiya No.14

[ Objective] The aim was to observe the ultrastructure of different callus structures in Heiya No. 14 by transmission electron microscopy. [Methods] Sample preparation and observation were both carried out by conventional transmission electron microscopy. [ Results] It was showed by transmission electron microscopy that the initial callus cells had a large central vacuole, which squeezed its cytoplasm to be a thin layer around the brim of cell, Meanwhile the nuclear was also squeezed to distribute in the corner of cell, but its nucleolus could be still observed; Compared embryogenic callus with initial callus, its cell wall became thick, and many starch grains and chloroplasts including starch grains could be observed in the cytoplasm area of cell membrane; In non-embryoenic callus, no organelles except for the vacuole could be observed; In browning callus, there was almost no organelles in cells. [ Conclusion] There are significant differences in different types of flax callus at the cell ultrastructure level, which can be as an index for reflecting the differentiation ability of callus cell.

Research on workflow meta model supporting activity based costing

Activity based costing (ABC) is a method which can solve many limitations of the traditional cost systems in manufacturing management. In this paper, we investigate how to integrate ABC with workflow technology, and build a workflow meta model supporting ABC. Firstly, the concept and concept model of activity based costing (ABC) are introduced. Next, the meta model of P -PROCE (Process, Product, Resource, Organization, and Cost & Evaluation) is presented. Then the cost meta model is defined by adding ABC to P -PROCE model. Object constraint language (OCL) is used to express meta model and constraints. Finally, we show an enterprise modeling and simulation tool based on the workflow meta model. We can systematically construct an enterprise model and easily and efficiently conduct simulation. Moreover it enables us to analyze and evaluate business processes and its costs.

Property of Dual-purposed Maca Powder as Medicine and Food

[Objective] The aim was to research property of maca and three plants＇ powders and process parameters of compound maca direct compression. [Method] Based on analysis data from SAS, bulk density, tap density, angle of repose and swelling of powders were studied as per single factor method and orthogonal exper- imental design. [Result] The test indicated that fillibilities of plant A and B, and maca powders are better and flowability plays an important role in fractional close of compound maca powder; plant A and B powders have a significant effect on bulk density of maca （P=0.0125）, an extremely significant effect on swelling volume ratio （P=0.008 9） and little effect on tap density （g/ml）; the optimal process condition of compound maca powder is as follows： A at 0.15 share; B at 0.10 share; C at 0.05 share; the optimal swelling volume ratio is at 2.459. [Conclusion] The technology is reasonable in formulation and satisfactory in fillibility, swelling ability, flowability, and it could serve as theoretical basis for the industrial production of maca tablets.

PRODUCT COMPETITIVE ADVANTAGES ANALYSIS IN MARKET PERSPECTIVE

Voices of Customer” (VOC) is a driving force for new product development.The macro viewpoint of market perspective,a more global aspect of VOC,can reflect the overall situation of the state of art of market competition,by means of competitors status analysis,market opportunities seeking,and then provide a quantitative guidelines and assessment for the development of new products.In this paper,a systematic approach for the planning of new products,which is established on the macro viewpoint of market perspective,is proposed.A set of enabling techniques is also developed to overcome difficulties and to meet challenging involved in the planning.A typical engineering case study for a new vehicle program development is used to demonstrate the feasibility and effectiveness.

Investigation and analysis on indoor air quality of large commercial office building in summer

To study the indoor air qualities（IAQ）of large commercial office buildings in Hunan province of China and the corresponding improvement methods,the IAQ of a large commercial office building in Changsha in July,2008,is investigated.A questionnaire survey and field tests are used to collect data.According to the data of twelve rooms in this building,objective evaluation and the subjective evaluation of the IAQ are obtained.Almost all of the environmental parameters in these rooms basically meet the standards of the objective evaluation.But the average concentration of carbon dioxide in most rooms cannot reach the value of the cleanliness standards,1 255 mg/m^3.The average acceptability of the IAQ in these rooms is 71%,which is lower than the value of the ASHRAE 55—1992 standards,80%.The proper increase in the wind speed and the indoor fresh air supply can greatly improve the objective evaluation and the subjective evaluation of the IAQ.

Quality Management Research on the Purchasing of Food Processing Enterprises

In order to improve the purchased goods quality management level of food processing enterprises, the causes of quality management problems were ana- lyzed, which were classified into four categories, namely, natural toxins in raw ma- terials, quality problems in planting and breeding, quality problems in transportation, quality problems in delivery acceptance. Then, based on the causes, eight measures to improve goods purchasing management were put forward, and graphs were used to illustrate the corresponding countermeasure to each cause. This study is of theo- retical significance for the food processing enterprises to improve the quality man- agement of purchased goods through formulating improvement measures based on their operating states.

The Present Situation and Development Countermeasures for Meat Products Industry in Henan

This paper introduces the development and present situation of meat industry in Henan Province so as to get comprehensive understanding of this industry,including the advantages and insufficiencies of this industry,and then puts forward some countermeasures for the future development of the meat products of Henan Province,to realize the rapid,healthy and sustainable development of meat industry in Henan and create huge economic and social benefits in Henan.

Pretreatment of Isopropanol Solution from Pharmaceutical Industry and Pervaporation Dehydration by NaA Zeolite Membranes

NaA zeolite membranes with 80 cm in length and 12.8 mm in outer diameter were prepared by our research group cooperating with Nanjing Jiusi Hi-Tech Co., China. The influence of dissolved inorganic salts and pH value in the feed of isopropanol （IPA） solution on NaA zeolite membranes was investigated. It was found that both factors exhibited strong influence on the stability of NaA zeolite membranes. A set of pretreatment steps such as pH adjustment and distillation of the IPA solution were proposed to improve stability for pervaporation dehydration. An industrial-scale pervaporation facility with 52 m2 membrane area was built to dehydrate IPA solution from industrial cephalosporin production. The facility was continuously operated at 368-378 K to dehydrate IPA solution from water mass content of 15%-20% to less than 2% with a feed flow rate of 400-500 L·h^-1 and an average water flux of 1-1.5 kg·m^-2·h-1. The successful application of this facility suggested a promising application of NaA zeolite mem-brane for IPA recovery from pharmaceutical production.

Mineral Elements in Different Varieties of Camellia sinensis

To understand the mineral elements in different varieties of tea （ Camellia sinensis）, 17 mineral elements in eight tea varieties including Yunnan Dayezhong, No. 43 Longjing and No. 6 Zaobaijian, were measured. The results showed that nine elements, such as P, K, Ba, Mn, Cu, were significantly different among varieties, others did not. Black tea varieties usually contain high contents of Cu and K. As a conclusion, mineral elements should be extensively considered in breeding tea varieties.

A Comparative Study of Genetic Variation between Chinese Mitten Crab Eriocheir Sinensis and Hepu Mitten Crab E.Hepuensis

Horizontal starch gel electrophoresis was used to investigate the biochemical genetic structure of Chinese mitten crab Eriocheir sinensis and Hepu mitten crab E.hepuensis. Sixteen putative enzyme-coding loci were examined for forty-nine Chinese mitten crabs and thirty-eight Hepu mitten crabs. Nine loci, AAT-1 *, AAT-2 *, G3PDH *, GPI *, IDHP-1 *, IDHP-2 *, MDH-1 *, MDH-2 * and PGM *, are polymorphic in Chinese mitten crab, and seven, AAT-1 *, AAT-2 *, GPI *, IDHP-1 *, MDH-1 *, MDH-2 * and PGM *, are polymorphic in Hepu mitten crab. The proportion of polymorphic loci and the expected heterozygosity are 0.562 5 and 0.080 3 for Chinese mitten crab, and 0.437 5 and 0.075 4 for Hepu mitten crab. The Nei’s genetic distance between two species is 0.002 4.

Issues in Freeze Drying of Aqueous Solutions

Freeze drying or lyophilization of aqueous solutions is widely used in pharmaceutical industry. The in-creased importance Of the process is gaining a worldwide interest of research. A growing body of literature has demonstrated that the scientific approach can result in improved product quality with minimum trial and error em-piricism. Formulation and process development need a systematical understanding of the physical chemistry of freezing and freeze drying, material science and mechanisms of heat and mass transfer. This paper presents an overview on freeze ding of aqueous solutions based on publications in the past few decades. The important issuesof the process are analyzed.

Sensory Analysis Technology and Its Application in Food Industry

Sensory analysis technology has been widely used in food industry, involved with new product development, and the control of food quality. The sensory analysis technology is applied to analyze products of similar category, which can provide references for product improvement. This paper briefly introduced the definition of sensory evaluation, analysis methods and influence factors as well as the application of sensory analysis technology in food industry.

Preparation and simulation of a taro flavor

Flavors represent a small but significant segment of food industry.Taro gives a pleasant nut-like odor when cooked.Taro flavor can be used in many products,so developing a taro flavor is of interests.This paper concentrates on preparation and simulation of taro flavor according to the notes of taro,which are distinct flavors or odor characteristics.The results show that the notes of taro flavor can be classified as caramellic note,roast note,milky note,beany note,green note,aldehydic note,sweet note,nutty note,vegetative note,and fruity note.According to the notes of cooked taro odor and the raw materials selected,a typical taro flavor formula is given.The taro flavor blended is pleasant,harmonious,and has characteristics of the odor of cooked natural taro.

Fuzzy integral based measurement and assessment of medium and small enterprises'product innovation

A fuzzy integral based way of measurement assessment has been established by using linguistic varia-bles and combining fuzzy integral with hierarchy analysis for measurement of medium and small enterprises'product innovation. The conclusions drawn from analyses made with 20 medium and small enterprises providebases for governments to formulate applicable policies and for medium and small enterprises to enhance theirproduct innovation.

Investment Risks of Agricultural Listed Companies from Visual Angle of Natural Disasters

The essential feature of agriculture is the interweave- ment of natural reproduction and economic reproduction.In recent years,the natural disasters have become more frequent and badly affect the production management and investment benefits.This problem has been an important risk in managing agricultural listed companies and cannot be ignored.It is of great importance to evaluate and prevent the risks of the natural disasters to enhance the competitive ability and increase the profits of those listed companies,thereby keeping the sustainable development of agri- cultural companies.