Although green innovation strategy (GIS) is the driving force for the sustainable development of enterprises, while the strategy is implemented, an increased cost and a change in organizational routines will cause an organization to become fragile, and even affect the sustainable competitive advantages. So, the purpose of this paper is to explore the impact path of GIS on sustainable competitive advantages and the implementation boundary of GIS. To explain the impact path, we consider the concept of dynamic capabilities to be the mediator variable. To explain the implementation boundary of GIS, we systematically explore the relationships among GIS, dynamic capabilities and sustainable competitive advantages under different levels of environmental uncertainty. Based on 241 new Chinese green firms, the empirical results find that GIS helps enterprises to gain sustainable competitive advantages. However, in the process of strategy implementation, enterprises should choose appropriate methods according to different degrees of environmental uncertainty. In a low environmental uncertainty, dynamic capabilities play a full intermediary role between GIS and sustainable competitive advantages. However, in a high environmental uncertainty, dynamic capabilities have no mediating effect between GIS and sustainable competitive advantages. This study not only integrates green management theory and strategic management theory but also makes up for the deficiencies in research on these theories and has important reference value for enterprises that seek to carry out green innovation activities.

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Based on imperfect channel information feedback, the performance of space-time coded multi-antenna systems with adaptive modulation and feedback delay is investigated in Rayleigh fading channel, and the corresponding theoretical analysis for spectrum efficiency (SE) and bit error rate (BER) is presented. The fading gain value is partitioned into a number of regions

Impacts of outdated CSI for secure cooperative systems with opportunistic relay selection SCIENCE CHINA Information Sciences 60, 069303 (2017); A novel multi-relay cross-layer cooperative communication strategy based on Jackson queuing model SCIENCE CHINA Information Sciences 53, 842 (2010); Performance analysis of MIMO systems with arbitrary number transmit antenna selection and OSTBC in the presence of imperfect CSI SCIENCE CHINA Information Sciences 59, 082304 (2016); Adaptive robust Max-SLNR precoder for MU-MIMO-OFDM systems with imperfect CSI SCIENCE CHINA Information Sciences 59, 062302 (2016); Cross-layer packet scheduling for downlink multiuser OFDM systems Science in China Series F-Information Sciences 52, 2369 (2009);. RESEARCH PAPER .

The core activities of tender documents compilation are to collect similar historical tender documents, select compilation templates of tender documents and revise templates of tender documents partially. However, when the historical tender documents have accumulated to a certain amount, it becomes extremely difficult for compilers to summary, reuse and revise templates artificially in traditional compiling methods. Based on casebased reasoning (CBR), this paper studied the content recommendation method in the process of tender document construction. Firstly, a structured model of tender documents was constructed, and similar tender cases were retrieved from the tender case database according to the characteristics of tender cases; Secondly, the non-interference sequence index was used to measure the similarity of clauses used in similar tender cases, and the recommended sequences of reference template and content module of tender documents were constructed, which realized the recommendation of compiling templates of tender documents and partial revision of templates; Finally, the knowledge of the new tender case was updated. The empirical analysis shows that the construction method of tender documents based on case-based reasoning not only proposes a suitable strategy for compiling tender documents, but also improves the compilation efficiency of tender documents.

In the current era of economic globalization and complex business environment, R&D investment is an important source of corporate value creation and competitiveness enhancement. As an important part of R&D investment, social capital has an inseparable relationship with enterprise technological innovation. Due to the multiple connotations of social capital and the complexity of combining with the Chinese cultural background, although there has been a large amount of literature on the relationship between corporate social capital and innovation performance, scholars have different results on the relationship between them. To this end, this article reviews and sorts out the concepts of corporate social capital and innovation performance that have been studied and their mechanism of action, and prospects for future research directions.

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