In recent years, with increasingly frequent economic and trade cooperation between China and African countries, China has become the most important international trade partner and an important source of foreign investment for Africa. Therefore, there is room for both sides to further expand and deepen their economic and trade cooperation. The peace and security situation in Africa has always been a mixed story. On the one hand, it shoes a generally positive trend with regional conflicts, wars and other traditional security hot problems declining. On the other hand, new types of security challenges continuously emerge, and non-traditional security problems become the most serious ones. This complex security situation results from both internal and external factors, including tribalism, resource curse, long-term economic underdevelopment, severe food shortage, incapable national governance, intervention by external forces, globalization, and the amplification effect of technological advancements. Both security governance within African countries and external forces' intervention in regional peace and security affairs are manifestly characterized by militarization. Due to the military intervention by external forces, countries in the region have become more dependent on external intervention and cannot improve their own capacity of security governance, thus creating a vicious circle of conflicts-external intervention-withdrawal of external forces-recurrence of conflicts. This regional security situation exerts an obvious influence on international economic and trade cooperation. Protection of overseas interests requires the joint efforts of the Chinese government, enterprises and all sectors of the society to take corresponding measures. On the basis of previous endeavors, the Chinese government should continue strengthening cooperation with African countries in peace and security affairs. The cooperation should keep in pace with the evolution of global economic and political security patterns, meet the demand for the upgrading of China-Africa relations, conform to the altered nature of regional peace and security, and accord with the shift of concept and method of China's participation in international affairs.
In accordance with the global needs of heavy metal-contaminated site remediation, this book systematically introduces the latest theories and technical achievements of microbial and chemical treatment for the chromium pollution in the chromium slag and chromium-contaminated soil, combined with the author's research achievements over the decades. The book focuses on the biological and chemical behavior of chromium in soil, microbial, and chemical remediation for the chromium-contaminated soil and the cases of chromium-contaminated site remediation project. This book is used by the scientific researchers and engineering technicians engaged in chromium chemical industry and environmental protection. It is also used as a textbook and reference book for graduate students in environmental science and engineering, soil science, chemistry and chemical engineering, and other related fields.
In accordance with the global needs of heavy metal-contaminated site remediation, this book systematically introduces the latest theories and technical achievements of microbial and chemical treatment for the chromium pollution in the chromium slag and chromium-contaminated soil, combined with the author's research achievements over the decades. The book focuses on the biological and chemical behavior of chromium in soil, microbial, and chemical remediation for the chromium-contaminated soil and the cases of chromium-contaminated site remediation project. This book is used by the scientific researchers and engineering technicians engaged in chromium chemical industry and environmental protection. It is also used as a textbook and reference book for graduate students in environmental science and engineering, soil science, chemistry and chemical engineering, and other related fields.
This book investigates two types of static multi-fidelity surrogates modeling approaches, sequential multi-fidelity surrogates modeling approaches, the multi-fidelity surrogates-assisted efficient global optimization, reliability analysis, robust design optimization, and evolutionary optimization. Multi-fidelity surrogates have attracted a significant amount of attention in simulation-based design and optimization in recent years. Some real-life engineering design problems, such as prediction of angular distortion in the laser welding, optimization design of micro-aerial vehicle fuselage, and optimization design of metamaterial vibration isolator, are also provided to illustrate the ability and merits of multi-fidelity surrogates in support of engineering design. Specifically, lots of illustrative examples are adopted throughout the book to help explain the approaches in a more “hands-on” manner. This book is a useful reference for postgraduates and researchers of mechanical engineering, as well as engineers of enterprises in related fields.
Conventional metaphorical expressions are widely used by native speakers in everyday language and have received extensive attention in theoretical semantics and cognitive linguistics. However, how a second language learner can acquire those expressions is left largely unknown. Researchers and language learners face the question: if one has acquired the literal meaning of a word, can they automatically derive the metaphorical meaning? This book provides the answer by placing the question of acquisition of metaphorical expressions in the framework of bilingual lexicon. Assessing whether metaphorical expressions are taken for granted by second language learners, it explores how the metaphorical meaning(s) of a word should be connected in a learner's mental lexicon, and how the cross-linguistic availability of a metaphorical expression could affect the outcome of acquisition of that expression. The book also provides a detailed comparison between metaphorical expressions and other figurative language from both the theoretical and experimental perspectives.
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