1,723,587 research outputs found
Replication Data for: 2013–2019 increases of surface ozone pollution in China: meteorological and anthropogenic influences
No full textThis dataset is supporting the project of: 2013–2019 increases of surface ozone pollution in China: meteorological and anthropogenic influence
Competition and Merger in Network Economy
Full text linkThis thesis is concerned about firm’s merger and competition behavior in moderneconomies in which networks are ever-more important and how to optimize mergerpolicy when network externalities present. As a demand-side economics of scale,network externalities bring benefit to consumers through merger and acquisition if theproducts from different firms are incompatible. Hence, a merger, which is bothsocially optimal and privately profitable, can exist without considering thesupply-side economies of scale. Merger policy should be revised to be able torecognize these “good” mergers and encourage them. Firm’s incentive to merge isenlarged by network effect because merged entities can benefit from a larger network,which increases the demand for their product. Moreover, merger and acquisition innetwork world give the merged entities an advantage in competition over the firmswho stand outside the merger. One of the explanations for this advantage is mergedentity may inherit indirect network resources, for example complementary productsproducers, from all merged firms, since the mobile of these resources are costly andslow. Acquiring more firms brings more indirect network resources to merged entity,which makes the products of merged entity more valuable to the consumers. Thus themerged entity can charge a higher price or squeeze more market share. Merged entitycan obtain locked-in consumers from all merged firms is another explanation of theadvantage. For some information products, such as TV subscription, internet accessand mobile phone service, consumers need to sign a contract with the service providerand are locked by these contracts for a fixed period. Merged entity may inherit theselocked-in consumers and show a larger initial network to the consumers who are notlocked at the beginning of the competition. Social planner should be cautious to themerger in network world because network externalities magnify the power of themerger, which may be utilized by the firms to get dominant position
Improved 6.7GHz CMOS VCO Delay Cell With Up To Seven Octave Tuning Range
No full textThe choice facing most VCO and PLL designers in modern CMOS processes is whether to use LC oscillators with large area and low phase noise, or to use an inverter based all transistor solution with poor phase noise, but much smaller size. This paper makes significant progress in closing the gap in performance between the inverter based and LC approaches. A novel double feedback dual inverter delay cell is proposed that achieves a significantly wider tuning range than previously reported whilst maintaining excellent phase noise performance. A design methodology is presented that includes noise analysis relating transistor level dimensions to the predicted phase noise performance. Two 120nm 1.2V design examples demonstrate that VCOs based on the improved delay cell can reach frequencies in excess of 6.7GHz, and that tuning ranges of over 7 octaves can be achieved
Convergence Analysis of the Distributed Analytical Representation and Iterative Technique (DARIT-Field) for the Field Coupling to Multiconductor Transmission Lines
Full text linkThis paper investigates the convergence and error evaluation of the distributed analytical representation and iterative technique (DARIT-field) which is a new approach for the analysis of field coupling to multiconductor transmission lines. The DARIT-field method has the advantage of high computational efficiency over the other methods. In order to know the convergence speed and the error at each iteration step of DARIT-field, an analytic expression of iterative error is derived by combining the two telegrapher's equations into a matrix equation and using the euclidean norm to explore its upper bound. The expression shows that the convergence speed is mainly influenced by three parameters, namely coupling factor (CF), terminal loads, and the line length to excitation field wavelength ratio (d/λ). The convergence speed is a function of CF, terminal loads, and the line length to excitation field wavelength ratio (d/λ). These results allow the users to make a compromise between computational cost and accuracy by selecting the number of iteration
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Uniform Additivity in Classical and Quantum Information
Full text linkInformation theory quantifies the optimal rates of resource interconversions, usually in terms of entropies. However, nonadditivity often makes evaluating entropic formulas intractable. In a few auspicious cases, additivity allows a full characterization of optimal rates. We study uniform additivity of formulas, which is easily evaluated and captures all known additive quantum formulas. Our complete characterization of uniform additivity exposes an intriguing new additive quantity and identifies a remarkable coincidence—the classical and quantum uniformly additive functions with one auxiliary variable are identical.National Science Foundation (U.S.) (Grants CCF-1110941 and CCF-1111382
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