2613 篇
1075 篇
264385 篇
3265 篇
6305 篇
2228 篇
2769 篇
537 篇
29522 篇
9423 篇
3131 篇
747 篇
2294 篇
1314 篇
449 篇
752 篇
1387 篇
2597 篇
2736 篇
3996 篇
[科学研究和技术服务业] [2021-11-10]
[科学研究和技术服务业] [2021-11-08]
[科学研究和技术服务业,水利、环境和公共设施管理业,电力、热力、燃气及水生产和供应业] [2021-11-03]
电力已经进入社会经济生活的各个领域,成为社会健康发展必不可少的能源基础。电力行业包括发电、输电、配电及售电环节,在电力生产及传输技术迅速发展的今天,电力行业不同环节具有不同的经济特征。长期以来我国电力系统采取的是垂直一体化的垄断经营体制,自20世纪80年代以来,电力行业开始逐步改革,电力市场化改革取得了重大进展,但也存在不少问题。由于电力市场结构、交易结构、平衡市场的特殊性,我国在推进市场化改革中面临着电价上涨、制约经济发展、运行协调机制等风险。随着我国经济发展进入新常态,电力发展也进入了一个新常态。新常态下,深化电力市场化改革面临着诸多挑战,在借鉴英国、美国及欧盟电力市场化改革成功经验的基础上,结合我国电力行业发展的情况和电力市场的特性,在进一步深化电力市场化改革中应优化电源结构与布局,推进电价配套改革和电力体制改革,建立健全电力监管制度和电力金融市场,从而把电力市场化改革推向新的水平。
[科学研究和技术服务业,石油加工、炼焦和核燃料加工业,电力、热力、燃气及水生产和供应业,水利、环境和公共设施管理业] [2021-11-03]
电力在现代社会中占有举足轻重的地位,然而纵使技术发展到现在,电能的获得仍然主要依赖于燃烧传统化石能源的火力发电,但是火力发电由于其本身存在的问题,无法做到可持续发展。所以具备安全、清洁、高效特性的新型发电方式必然会有更广阔的应用前景,如核电。本报告首先介绍了我国核电的现况以及存在的问题,其次对我国核能发电的未来趋势做出了大致的辨析和预测,最后根据先前的分析提出了一定的政策性建议。
[科学研究和技术服务业,水利、环境和公共设施管理业,电力、热力、燃气及水生产和供应业] [2021-11-03]
2008年金融危机之后,全球经济增速开始放缓,而能源环境问题日益凸显,可持续发展面临巨大的挑战。与此同时,中国经济发展已经从单纯依靠速度的外延式增长转入以创新驱动、结构升级、节能环保等为特点的中高速平稳增长阶段。在经济新常态背景下,发展新能源产业是转变发展方式的内在要求,同时作为一个具有广阔发展前景的产业,新能源产业必将在新的增长阶段中大有作为。从世界范围看,各国近年来都高度重视新能源产业发展,加快推进能源革命。中国也在积极调整优化能源结构,大力培育新能源产业,提出了到2020年非化石能源消费比重提高到15%以上的目标。应该看到,这些年来我国新能源产业已取得了长足发展,但与国外相比仍有不小的差距。差距和问题既意味着巨大的潜力,也充分说明挖掘新能源这座“金矿”一定要有战略眼光。
[公共管理、社会保障和社会组织,科学研究和技术服务业] [2021-11-02]
[科学研究和技术服务业,公共管理、社会保障和社会组织] [2021-11-01]
[科学研究和技术服务业] [2021-10-31]
Industrial microbiology is the branch of applied microbiology that involves the utilization of microorganisms in industrial processes such as pharmaceutical drugs development, vaccines production, industrial fermentation, wastewater treatment, and industrial chemical treatment. Industrial microbiological quality control includes the use of products and services for the identification and control of microbial species in the manufacturing of food items, beverages, drugs, cosmetics, biologics, and other industrial products in large quantities.
[医药制造业,科学研究和技术服务业] [2021-10-30]
Currently, the field of radiation therapy is changing in terms of radiation type, and there are several changes in adoption patterns among its end-user segments. The end users are shifting from conventional radiation (Xray, or Cobalt-60, among others) to modern radiation such as a proton or heavy ion radiation. The increasing demand for modern radiation therapy systems has led to the increasing awareness of cancer/tumor treatments. The primary role of these systems is to shrink or destroy cancer/tumor depending on cancer/tumor type, stage, patient age, number of radiation sessions required, and many other factors. Radiation therapy can be divided primarily into external beam radiation therapy, also known as teletherapy, and internal beam radiation therapy, also known as brachytherapy. In the past decade, the definition of these technologies has expanded. Earlier the radiation therapy was only referred to as a simple therapy only done by the radiation beam. Now, radiation therapy includes internal radiation or external radiation combined with chemotherapy or open body surgery or combining various radiation therapy techniques such as IGRT, VMAT, and SRS to destroy or shrink cancer/ tumor. The ongoing trend of offering new radiation therapy systems which have proton or heavy ion beam, integration of two different radiation therapies, and integration of imaging technology with radiation therapy systems showcase the growing future of technological innovations and advancements in radiation therapy in the oncology field.
[医药制造业,科学研究和技术服务业] [2021-10-29]
Direct-to-consumer genetic tests (DTC-GT) offers its consumers the ability to solve their individual genetic puzzle. The confluence of breakthroughs in genetic testing has not only decreased the time required to perform a genetic test but also has reduced the cost of conducting these tests. All these factors combined have given DTC-GT a lot of acceptance among the consumers. The major proponent of the DTC-GT market is the distribution channels opted by the companies. The companies are marketing these tests via online or retail channels. With the piqued advertisements of these tests through print, media, and the internet, the industry is gaining familiarity among consumers. Companies such as 23andme, Mapmygenome, Ancestry.com, EasyDNA, and 24Genetic are offering a large number of diversified services related to genealogy testing, health conditions, and traits. The journey of the DTC-GT initiates by a consumer ordering the test through an online channel. The sample collection kit is provided to the consumers. DNA sample such as saliva or oral swab is collected by the consumer and sent back to the organization for the analysis. Consumers get their test results on their online account within 3-5 weeks.