Tạp chí Khoa học Thăng Long

Let F be an algebraically closed field of characteristic p ≥ 0, which is complete with respect to a non-Archimedean absolute value. Let V be a projective subvariety of PM(F). In this paper, we will prove some second main theorems for non-Archimedean meromorphic maps of Fm into V intersecting a family of hypersurfaces in N-subgeneral position with truncated counting functions.

In this paper, we survey the results on the Korenblum Maximum Principle for some weighted function spaces. Progress and results discussed include the upper bounds and lower bounds of Korenblum constants, as well as the failure of the principle for weighted Bergman spaces, weighted Hardy spaces, weighted Bloch spaces, weighted Fock spaces, and mixed norm spaces. Existing and new open questions are provided.

The purpose of this paper is to study uniqueness problem of meromorphic mapping from Cm into the complex space Pn(C) sharing partial fixed and moving hypersurfaces. Using the second main theorems due to S. D. Quang and D. P. An [12, 13], we obtain some uniqueness results. Our results are improved some before results in this trend. In our best knowledge, there are not any uniqueness results of meromorphic mapping partially shared hypersurfaces up to now.

We give all solutions of the equation F(n2 + m2 + k) = H(n) + H(m) + K  (∀n;m ∈ N), where k ∈ N is the sum of two xed squares, K ∈ C and F, H are completely multiplicative functions.

In recent years, blockchain technology, with its outstanding advantages in terms of security and decentralized data storage, has quickly been applied in education, especially in managing educational certificates. The traditional paper certificate management process has many limitations on security, storage, verification, ownership, and prevention of certificate fraud and tampering. With emerging blockchain technology, the traditional paper certificate management process has changed to a new stage with massive benefits and opportunities to overcome the above challenges. Following this approach, many blockchain-based applications have been proposed, and several universities worldwide have adopted various solutions based on blockchain technology. This paper presents implementing an educational certificate management system based on blockchain technology using the Hyperledger Fabric platform. Our proposed solution can be solved in almost storage and security aspects of certificate management problems, such as confidence, verification, ownership, and tamper avoid.

Despite being a very valuable book, An Nam chí nguyên (Ānnán zhì yuán) 安南志原 has long caused doubt and controversy among Vietnamese and international scholars. Of all its aspects (title, compiler, structure, date, etc.), the provenance of the book is the most controversial topic. This paper,by recounting the history of questioning the origin of the book, as well as introducing and examining some related documents, aims to contribute to determining the clear and reliable provenance of each part of the book. The paper suggests that An Nam chí nguyên’s parts mostly originated from gazetteers which were compiled by officials of the Míng Dynasty. Thus, the paper contributes to affirming the value (reliability, originality, rarity, etc.) of the book. Concurrently, the paper thoroughly explains the origin of the title An Nam chí nguyên and put an end to the long-standing controversy about this title.Through the survey and comparison between relevant documents, the paper also discusses the role and contribution of Gāo Xióngzhēng (Cao Hùng Trưng) 高熊徵 - the only identified author who is often attributed to An Nam chí nguyên, to the book. Finally, the paper proposes some issues that needto be investigated further to have clearer and more accurate perceptions of the textual issues of the book.

rong bài báo này, chúng tôi trình bày một công cụ cao cấp của Trí tuệ nhân tạo, học tăng cường để thử nghiệm trong đầu tư cổ phiếu. Trí tuệ nhân tạo về cơ bản gồm có học máy, học sâu và học tăng cường.Học tăng cường sử dụng các lý thuyết toán học như quy hoạch động, quá trình quyết định Markov để cải tiến hành động trở nên tối ưu hơn. Học tăng cường có rất nhiều thuật toán khác nhau. Trong bài báo này, chúng tôi sử dụng thuật toán Zap Q-Learning để áp dụng trong việc đầu tư 30 mã cổ phiếu của thị trường chứng khoán Việt Nam. Chúng tôi thu được kết quả khá khiêm tốn: sau khi chiết khấu phần lãi suất ngân hàng, thì lợi nhuận còn khoảng 3%.

We provide a brief survey on basic solution approaches for solving the equilibirum problem defined by the Nikaido-Isoda-Fan inequality. Namely, first we state the problem and consider its most important special cases including the optimization, inverse optimization, Kakutani fixed point, variational inequality, Nash equilibrium problems. Next, we present some basic solution approaches for the problem. Finally, as an application, we consider the famous Cournot-Nash oligopolistic equilibrium model and discuss algorithms for solving it.

This paper tries to shed new light on the research on the village history in the Red River Delta during the 18th to early 19th centuries, based on the reexamination of the materials collected at former Bách Cốc Village (Vụ Bản District, Nam Định Province) and its surrounding villages in the joint field research project during 1994-2006. Although several preliminary studies on these materials have already been published, there is still room for deeper research. After summarizing the history of the research for the communal village in Northern Vietnam, this paper closely examines the information of landholdings in 1805 of Bách Cốc and two neighboring villages (Tiểu Cốc and Dương Lai). The striking deviation among these villages are then analyzed from new viewpoints other than conventional one that concentrate in the scale of landholdings (of only rice fields). For instance, judging from the records of Bách Cốc and another nearby village named Thị Mai, female landholders played an important role through their marriage in the land transfer among villages. Records of Tiểu Cốc shows that, besides rice fields, the land category of “housing lots, gardens and ponds” should be paid more attention to understand the household economy and the relationship among clanspeople as well. Finally, textual problems so far overlooked (the lack of uniformity among the sources of a same category and that among the listed information within a single material as well) of well-known materials related to the three villages such as địa bạ (land cadasters) and gia phả (family genealogy) are raised, hopefully providing basis of further research.

Mục tiêu: Mô tả tình trạng dinh dưỡng người bệnh nhập viện và đánh giá bước đầu kết quả can thiệp dinh dưỡng cho người bệnh có nguy cơ suy dinh dưỡng cao điều trị tại Khoa Hồi sức cấp cứu. Phương pháp nghiên cứu: Mô tả cắt ngang, thực hiện trên 346 người bệnh được đánh giá tình trạng dinh dưỡng và 52 người bệnh can thiệp dinh dưỡng. Kết quả: Tỉ lệ người bệnh có nguy cơ suy sinh dưỡng theo công cụ NRS là 54,3%, với người bệnh ≥70 tuổi, thở máy hoặc mắc ≥2 bệnh đồng mắc có nguy cơ SDD cao hơn; Có 61,6% người bệnh đạt được mức năng lượng khuyến nghị trong ngày đầu và tăng dần trong các ngày sau đó và điểm trung bình APACHE II giảm đáng kể từ 18 ± 4,4 xuống 13,4 ± 5,9 (p<0,05). Kết luận: Người bệnh nặng nên được đánh giá tình trạng dinh dưỡng và có can thiệp dinh dưỡng hỗ trợ trong quá trình điều trị.