Indirect Expropriation and One Belt One Road Initiative: A Pivotal Issue for the Implementation of China’s Refreshed Strategy for Foreign Investment

Yucong Wang 이준국제법연구원 2017 China and WTO Review Vol.3 No.1

Securing MapReduce Result Integrity via Verification-based Integrity Assurance Framework

Yongzhi Wang,Jinpeng Wei,Yucong Duan 보안공학연구지원센터 2014 International Journal of Grid and Distributed Comp Vol.7 No.6

MapReduce, a large-scale data processing paradigm, is gaining popularity. However, like other distributed computing frameworks, MapReduce suffers from the integrity assurance vulnerability: malicious workers in the MapReduce cluster could tamper with its computation result and thereby render the overall computation result inaccurate. Existing solutions are effective in defeating the malicious behavior of non-collusive workers, but are less effective in detecting collusive workers. In this paper, we propose the Verification-based Integrity Assurance Framework (VIAF). By using task replication and probabilistic result verification, VIAF can detect both non-collusive and collusive workers, even if the malicious workers dominate the environment. We have implemented VIAF on Hadoop, an open source MapReduce implementation. Our theoretical analysis and experimental result show that VIAF can achieve high job accuracy while imposing moderate performance overhead.

Competition of Phragmites australis and Typha orientalis in constructed wetland with horizontal subsurface flow and surface flow in northwestern China

Yucong Zheng,Xiaochang Wang,Mawuli Dzakpasu,Yuan Ge,Yaqian Zhao,Jiaqing Xiong 대한환경공학회 2015 대한환경공학회 학술발표논문집 Vol.2015 No.10

Efficacy and safety ofEight-Sequential-Portal Methodin treating elbow stiffness by elbow arthroscopy

Zhenzhu Fang,Yucong Wang,Jinyoung Park 대한견주관절의학회 2021 대한견주관절학회 학술대회논문집 Vol.2021 No.3

Introduction and Background To evaluate the efficacy and safety of “Eight-Sequential-Portal Method” in treating elbow stiffness by elbow arthroscopy Material and Method From December 2014 to February 2018.46 patients were treated for elbow stiffness with arthroscopic in our hospital.The diagnoses included 23 cases of elbow osteoarthritis,11 rheumatoid arthritis,4 synovial chondromatosis,4stiffness after trauma,2 exfoliative osteochondritis and 2 gouty arthritis.We used ”Eight- Sequential-Portal Method” to establish the portals of elbow arthroscopy.We first established the proximal medial portal, inserted the arthroscopy. The proximal lateral portal was established under arthroscopy as the second portal, then sequentially established anterolateral portal, soft-spot portal, humerus-radio joint posterior portal, auxiliary posterolateral portal, posterolateral portal, straight posterior portal. The compartment of anterior , posterolateral,posterior was systematic explored. The operating procedures included loose bodies removal, synovial hyperplasia clearing, osteophytes hyperplasia clearing, articular capsule release .After surgery, rehabilitation exercises were performed under algesia controller during the day and extension brace was fixed for 2 weeks at night. The range of motion (ROM) before and after surgery was observed and compared, and the rehabilitation of elbow function was evaluated by Mayo scoring system. Results In this group,41 patients were followed up for 9 to 38 months, with an average of 13.6months. The average maximum flexion and extension range of elbow joint was (63.7±22.3) degree before operation and (106.5±32.8) degree after operation. The postoperative Mayo elbow-performance indexes ranged from 55 to 100(average,84.54±10.5) points.17 cases were rated as excellent,14 good,8 fair,and 2 poor.One case, the medial sensation of the forearm was reduced after surgery, considering the injury to the Medial antebrachial cutaneous nerve, one patient had dry skin and no sweating in the palm of the hand, considering the median nerve injury, but both recovered in 3 months after surgery. No ulnar and radial nerve injuries occurred. Conclusions The “Eight-Sequential-Portal Method” can ensure satisfactory exposure,clear view and release completely in treating elbow stiffness. The portals are safe, leading to low incidence of complications, It is a safe and effective treatment,and the curative effect is satisfactory.

Dual-inhibitor composite BTA/PPy/MIL-88(Fe) for active anticorrosion of epoxy resin coatings

Meng Zhang,Yu Zhang,Yucong Chen,Xiaoru Tian,Lingzhi Liu,Yizhong Wang,Ruijie Guo,Hong Yan 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.119 No.-

MIL-88(Fe) was used as an oxidant and a hard template for the synthesis of polypyrrole (PPy) on its surface,and the formation of PPy made the surface of MIL-88(Fe) rougher as well as more voids formed inthe interior. The increased specific surface area allowed more benzotriazole (BTA) (17.8 wt%) loaded onPPy/MIL-88 particles. BTA/PPy/MIL-88(Fe) was employed as a novel corrosion inhibitor to enhance thecorrosion resistance of epoxy coating for carbon steel. BTA/PPy/MIL-88(Fe) filler improved the corrosionresistance of EP coating without/with artificial scratch by delaying the cathodic and anodic reactions incorrosive media. Both BTA and MIL-88(Fe) played the role of corrosion inhibitors, making EP coating possessactive corrosion protection and pH-sensitive performance. Besides, BTA/PPy/MIL-88(Fe) enhancedthe adhesion of EP coating by filling the pores inside.

Spermatogenesis of Male Patients with Congenital Hypogonadotropic Hypogonadism Receiving Pulsatile Gonadotropin-Releasing Hormone Therapy Versus Gonadotropin Therapy: A Systematic Review and Meta-Analysis

Wei Chao,Long Gongwei,Zhang Yucong,Wang Tao,Wang Shaogang,Liu Jihong,Ma Delin,Liu Xiaming 대한남성과학회 2021 The World Journal of Men's Health Vol.39 No.4

Purpose: Pulsatile gonadotropin-releasing hormone (GnRH) therapy and gonadotropin therapy (GT) were widely used for male patients with congenital hypogonadotropic hypogonadism (CHH), but their efficacy was not well compared before. We conducted this meta-analysis to compare the efficacy of restoring fertility using these two therapies. Materials and Methods: PubMed, Web of Science, and Scopus were systematically searched for comparative studies evaluating the efficiency of GnRH therapy and GT for male patients with CHH. For continuous outcomes, the weighted mean difference (WMD) was used to measure the difference, whereas the risk ratio with 95% confidence interval was calculated for binary variables. Results: Overall, eight articles from seven studies with 420 patients enrolled were included in the analysis. Patients from the two different groups were determined to be comparable in age, proportion with Kallmann syndrome, percentage of cryptorchidism and pretreatment hormones (follicular-stimulating hormone, luteinizing hormone, and testosterone). GnRH therapy was related to a larger testicular volume (standardized mean difference=-1.43; p=0.01) and earlier spermatogenesis (WMD=- 5.30 months; p=0.004) compared to GT. However, the difference in the rate of positive sperm detection (p=0.08), sperm concentration (p=0.37), and pregnancy rate (p=0.11) were not significant. Allergic reactions mostly occurred during GnRH therapy, while GT was related to a higher incidence of gynecomastia and acne. Conclusions: Compared to GT, GnRH was related to earlier spermatogenesis and less estradiol-related adverse reactions, although there were no significant differences in spermatogenesis rate, sperm concentration, and pregnancy rate. High-quality randomized controlled trials are needed for future research.

High‑speed growth of high‑quality polycrystalline diamond films by MPCVD

Kai Chen,Tao Tao,Wenxiao Hu,Yucong Ye,Kaiwen Zheng,Jiandong Ye,Ting Zhi,Xiwei Wang,Bin Liu,Rong Zhang 한국탄소학회 2023 Carbon Letters Vol.33 No.7

High-quality diamond films have attracted extensive attentions due to their excellent optical and electrical properties. However, several issues, such as random orientation, stress accumulation, and slow growth rate, severely limit its applications. In this paper, high-quality polycrystalline diamond films with highly ordered (100) orientation were prepared by microwave plasma chemical vapor deposition. The effects of growth parameters on the microstructure, quality and residual stress of diamond films were investigated. Experimental results indicate that relatively high temperature at low methane concentration will promote the formation of (100) oriented grains with a low compressive stress. Optimized growth parameters, a methane concentration of 2% along with a pressure of 250 Torr and temperature at 1050 ℃, were used to acquire high growth rate of 7.9 μm/h and narrow full width at half maximum of Raman peak of 5.5 cm? 1 revealing a high crystal quality. It demonstrates a promising method for rapid growth of high-quality polycrystalline diamond films with (100) orientation, which is vital for improving the diamond related applications at low cost.

Deposition and evaluation of MoNx films deposited by magnetron sputtering

Yajun Ma,Shenghua Li,Yuansheng Jin,Guoshun Pan,Yucong Wang,Simon C. Tung 한국트라이볼로지학회 2002 한국트라이볼로지학회 학술대회 Vol.2002 No.10

Molybdenum Nitrided (MoNx) films were deposited by DC planar magnetron sputtering. Silicon wafers and real nitrided stainless steel piston rings are employed as substrates. 12 different combinations of nitrogen and argon partial pressure, from 1:7 to 7:1, were applied to deposit MoNx films. X-ray diffraction (XRD) was used to determine the phase structures of films. When nitrogen vs. argon partial pressure is 1:7, the film is mainly MO₂N phase. With increase of nitrogen partial pressure, MoN phase emerges, but MO₂N phase still exists. Composition analysis with atomic emission spectrometry (AES) also agreed with this. The films have very high nanohardness (max 2400Hv) and good adhesion to the substrates.

Macroscopic and Mesoscopic Characteristics of a Small-Span Metro Tunnel in the Development of a Disaster Under Load

Yu Cong,Heyi Liu,Liming Zhang,Sai Li,Yingren Zheng,Zaiquan Wang,Erdi Abi 대한토목학회 2021 KSCE JOURNAL OF CIVIL ENGINEERING Vol.25 No.11

A similarity model with a volumetric similarity ratio of 1:100 and a granular flow model for the tunnel were designed. By comparing macroscopic and mesoscopic information (such as fracture process, strain evolution, stress transfer, crack propagation, and stress distribution) of the tunnel models under load, the failure mechanism of the metro tunnel under load was investigated. The result showed that: 1) under the loading path, the instability area of the tunnel is mainly distributed in the straight wall on both sides. When the load is 1.5 MPa, a large number of cracks on both sides of the straight wall run through, resulting in the initial failure of the rock mass; 2) the surface rock mass of arch bottom is under tensile stress and the deep rock mass is under pressure stress, therefore, the fracture does not develop continuously. The surface of straight wall produces continuous development crack under the action of tensile stress; 3) the arch bottom first responds during the stress redistribution of the small-span tunnel; the top and middle parts of the side walls of the running tunnel with greatest potential for damage respond most; 4) in the process of stress redistribution, the peak stress of the deep measuring points of the straight wall is greater than that of the free surface; 5) at the initial stage of loading, tensile cracks account for a high proportion of all cracks found. When the load is 1.5 MPa, the proportion of shear cracks increases to 28%, and when the load is 1.6 Mpa, the proportion of shear cracks increases to 31%. Finally, the tensile-shear effect triggers the failure of the tunnel.