大学生在线学习效果的多维度比较研究

Lijuan Huang,Xiaoyan Xu Institute of Management Research 2023 Journal of East Asia Management Vol.4 No.2

Online and offline mixed teaching mode has become an important way to promote the connotative development of higher education. Under the background that offline teaching has become mature, in order to further promote the development of online education, and promote the implementation of the mixed teaching mode, to mix and to provide basis for the construction of the mixed teaching mode, this study takes the online learning effect as the evaluation basis, adopts the online questionnaire survey to conduct statistical analysis of the online learning behavior of 2213 college students, and discusses the differentiation phenomenon of online learning groups from the micro, meso and macro perspectives. It is found that there are significant differences in the online learning effect of college students in terms of the type of learning platform, whether the school implements the online offline mixed teaching mode, education background, grade (bachelor's degree), and region. Colleges and universities should strengthen the promotion of online and offline mixed teaching mode; The online learning platform should improve the platform function and strengthen the functional differentiation design of learning resources for students. Education departments pay attention to the learning effect of online learners in different regions, and bridge the gap in regional education.

A Framework of New Rural E-Government and the Related Information Resources Integration

Lijuan Huang,Qiaoqiao Luo,Chunfang Zou 보안공학연구지원센터(IJUNESST) 2013 International Journal of u- and e- Service, Scienc Vol.6 No.6

Intravenous patient-controlled analgesia hydromorphone combined with pregabalin for the treatment of postherpetic neuralgia: a multicenter, randomized controlled study

( Ying Huang ),( Chenjie Xu ),( Tao Zeng ),( Zhongming Li ),( Yanzhi Xia ),( Gaojian Tao ),( Tong Zhu ),( Lijuan Lu ),( Jing Li ),( Taiyuan Huang ),( Hongbo Huai ),( Benxiang Ning ),( Chao Ma ),( Xinx 대한통증학회 2021 The Korean Journal of Pain Vol.34 No.2

Background: Postherpetic neuralgia (PHN) is the most common complication of acute herpes zoster. The treatment of PHN remains a challenge for clinical pain management. Despite the effectiveness of anticonvulsants, antidepressants, and lidocaine patches in reducing PHN, many patients still face intractable pain disorders. In this randomized controlled study, we evaluated whether hydromorphone through intravenous patient-controlled analgesia (IV PCA) was effective in relieving PHN. Methods: Patients with PHN were randomly divided into two groups, one group received oral pregabalin with IV normal saline, another group received oral pregabalin with additional IV PCA hydromorphone for two weeks. Efficacy was evaluated at 1, 4, and 12 weeks after the end of the treatments. Results: Two hundred and one patients were followed up for 12 weeks. After treatment, numerical rating scale (NRS) score of patients in the hydromorphone group was significantly lower than that of the control group, and the difference of NRS scores between the two groups was statistically significant at 4 and 12 weeks after treatment. The frequency of breakthrough pain in the hydromorphone group was significantly lower than that in the control group 1 and 4 weeks after treatment. After treatment, the quality of sleep in the hydromorphone group was significantly improved compared with the control group. The most common adverse reactions in the hydromorphone group were dizziness and nausea, with no significant respiratory depression. Conclusions: IV PCA hydromorphone combined with oral pregabalin provides superior pain relief in patients with PHN, which is worthy of clinical application and promotion.

ON POLARS OF MIXED COMPLEX PROJECTION BODIES

Lijuan Liu,Wei Wang,Qingzhong Huang 대한수학회 2015 대한수학회보 Vol.52 No.2

In this paper we establish general Minkowski inequality, Aleksandrov-Fenchel inequality and Brunn-Minkowski inequality for polars of mixed complex projection bodies.

Preparation and photoluminescence properties of the Eu2+, Sm3+ co-doped Li2SrSiO4 phosphors

Lijuan Liu,Panli You,Guangfu Yin,Xiaoming Liao,Zhongbing Huang,Xianchun Chen,Yadong Yao 한국물리학회 2012 Current Applied Physics Vol.12 No.4

A series of Eu2+ and Sm3+ co-doped Li2SrSiO4 phosphors are prepared by the high temperature solidstate reaction. The morphology, structure and spectroscopic properties of the prepared samples are characterized by scanning electron microscopy, X-ray diffraction, diffuse reflection spectra, photoluminescence spectra and electron paramagnetic resonance spectra, respectively. The effect of Sm3þdoping concentration on the photoluminescence intensity of the prepared samples is also investigated. The results indicate that the crystal structure of Li2SrSiO4 is not changed with the Eu2+, Sm3+ co-doping. The spherical-like particle size of the obtained product is about 20-30 nm in diameter. When the Sm3+ concentration is 0.3 mol% and the Eu2+ concentration is 0.7 mol%, the phosphors show the maximum emission intensity, which is 50% higher than that of Eu2+ doped Li2SrSiO4. Excited at 420 nm, the phosphor presents a single broad emission band peaking at 558 nm, which is ascribed to the 4f65d1 / 4f7 transitions of Eu2+ and 4G5/2 / 6H5/2 and 4G5/2 / 6H7/2 transitions of Sm3+. The Commission International de I0Eclairage chromaticity coordinates of Li2SrSiO4:0.7 mol% Eu2+, 0.3 mol%Sm3+ are x = 0.28, y = 0.28. A series of Eu2+ and Sm3+ co-doped Li2SrSiO4 phosphors are prepared by the high temperature solidstate reaction. The morphology, structure and spectroscopic properties of the prepared samples are characterized by scanning electron microscopy, X-ray diffraction, diffuse reflection spectra, photoluminescence spectra and electron paramagnetic resonance spectra, respectively. The effect of Sm3þdoping concentration on the photoluminescence intensity of the prepared samples is also investigated. The results indicate that the crystal structure of Li2SrSiO4 is not changed with the Eu2+, Sm3+ co-doping. The spherical-like particle size of the obtained product is about 20-30 nm in diameter. When the Sm3+ concentration is 0.3 mol% and the Eu2+ concentration is 0.7 mol%, the phosphors show the maximum emission intensity, which is 50% higher than that of Eu2+ doped Li2SrSiO4. Excited at 420 nm, the phosphor presents a single broad emission band peaking at 558 nm, which is ascribed to the 4f65d1 / 4f7 transitions of Eu2+ and 4G5/2 / 6H5/2 and 4G5/2 / 6H7/2 transitions of Sm3+. The Commission International de I0Eclairage chromaticity coordinates of Li2SrSiO4:0.7 mol% Eu2+, 0.3 mol%Sm3+ are x = 0.28, y = 0.28.

ON POLARS OF MIXED COMPLEX PROJECTION BODIES

Liu, Lijuan,Wang, Wei,Huang, Qingzhong Korean Mathematical Society 2015 대한수학회보 Vol.52 No.2

In this paper we establish general Minkowski inequality, Aleksandrov-Fenchel inequality and Brunn-Minkowski inequality for polars of mixed complex projection bodies.

Establishment and evaluation of the VX2 orthotopic lung cancer rabbit model: a ultra-minimal invasive percutaneous puncture inoculation method

Wang, Lijuan,Che, Keke,Liu, Zhonghong,Huang, Xianlong,Xiang, Shifeng,Zhu, Fei,Yu, Yu The Korean Society of Pharmacology 2018 The Korean Journal of Physiology & Pharmacology Vol.22 No.3

The purpose of the present work is to establish an ultra-minimal invasive percutaneous puncture inoculation method for a VX2 orthotopic lung cancer rabbit model with fewer technical difficulties, lower mortality of rabbits, a higher success rate and a shorter operation time, to evaluate the growth, metastasis and apoptosis of tumor by CT scans, necropsy, histological examination, flow cytometry and immunohistochemistry. The average inoculation time was 10-15 min per rabbit. The tumorbearing rate was 100%. More than 90% of the tumor-bearing rabbits showed local solitary tumor with 2-10 mm diameters after two weeks post-inoculation, and the rate of chest seeding was only 8.3% (2/24). The tumors diameters increased to 4-16 mm, and irregularly short thorns were observed 3 weeks after inoculation. Five weeks post-inoculation, the liquefaction necrosis and a cavity developed, and the size of tumor grew further. Before natural death, the CT images showed that the tumors spread to the chest. The flow cytometry and immunohistochemistry indicated that there was less apoptosis in VX2 orthotopic lung cancer rabbit model compared to chemotherapy drug treatment group. Minimal invasive percutaneous puncture inoculation is an easy, fast and accurate method to establish the VX2 orthotopic lung cancer rabbit model, an ideal in situ tumor model similar to human malignant tumor growth.

재무부정의 동기: 중국 루이씽커피의 사례를 중심으로

오려견 ( Lijuan Wu ),황위동 ( Weidong Huang ),김산월 ( Shanyue Jin ) 사단법인 아시아문화학술원 2021 인문사회 21 Vol.12 No.6

루이씽커피는 중국의 신흥 커피 브랜드다. 루이씽커피는 온라인과 오프라인에서 운영되는 저렴한 커피 브랜드를 만들었으며 2019년에 성공적으로 나스닥에 상장하였다. 하지만 2020년에 루이씽커피의 재무부정이 폭로되었고 얼마 지나지 않아서 상장폐지 되었다. 따라서 본 연구는 루이씽커피의 재무부정이 왜 일어났는지 그 이유에 대해 설명하고 해결책을 제시하고자 한다. 본 연구는 사례연구 방법과 재무분석 방법을 적용하여 루이씽커피의 재무부정의 원인을 탐욕, 기회, 수요, 공개요인의 관점에서 해석하였다. 본 연구는 루이씽커피의 사례를 통해 기업들이 지배구조를 발전시키고 내부 통제를 강화해야 한다는 것을 제시하고 있다. Luckin Coffee is an emerging coffee band in China. It created an inexpensive coffee brand operating online and offline and soon successfully got listed on NASDAQ in 2019. However, Luckin Coffee’s financial fraud was revealed in 2020 and it was delisted shortly after. Therefore, this study aims to explain the reason why Luckin Coffee’s financial corruption occurred and suggest the solutions. The study applied the case study method and the financial analysis method to explain the causes of Luckin Coffee’s financial fraud in terms of greed, opportunity, demand, and exposure factors. This study suggests that companies should develop their governance structure and strengthen internal control through case of Luckin Coffee.

Application of model reduction technique and structural subsection technique on optimal sensor placement of truss structures

Chenguang Huang,Lingling Lu,Lijuan Liao,Yanpeng Wei,Yanchi Liu,Xi Wang 국제구조공학회 2015 Smart Structures and Systems, An International Jou Vol.15 No.2

An optimal sensor placement (OSP) method based on structural subsection technique (SST) and model reduction technique was proposed for modal identification of truss structures, which was conducted using genetic algorithm (GA). The constraints of GA variables were determined by SST in advance. Subsequently, according to model reduction technique, the optimal group of master degrees of freedom and the optimal objective function value were obtained using GA in a case of the given number of sensors. Correspondingly, the optimal number of sensors was determined according to optimal objective function values in cases of the different number of sensors. The proposed method was applied on a scaled jacket offshore platform to get its optimal number of sensors and the corresponding optimal sensor layout. Then modal kinetic energy and modal assurance criterion were adopted to evaluate vibration energy and mode independence property. The experiment was also conducted to verify the effectiveness of the selected optimal sensor layout. The results showed that experimental modes agreed reasonably well with numerical results. Moreover the influence of the proposed method using different optimal algorithms and model reduction technique on optimal results was also compared. The results showed that the influence was very little.

Bilateral Sacrospinous Hysteropexy Versus Bilateral Sacrospinous Ligament Fixation with Vaginal Hysterectomy for Apical Uterovaginal Prolapse

Kaiyue Wang,Lijuan Shi,Zheren Huang,Yun Xu 대한배뇨장애요실금학회 2022 International Neurourology Journal Vol.26 No.3

Purpose: The aim of this retrospective study was to compare the anatomical and functional outcomes between bilateral sacrospinous hysteropexy (BSHP) and bilateral sacrospinous ligament fixation with vaginal hysterectomy (BSLF/VH) in women with apical-predominant uterovaginal prolapse. Methods: Clinical data from patients with symptomatic Pelvic Organ Prolapse-Quantification (POP-Q) stage 2 or higher uterovaginal prolapse who underwent either BSHP (48 patients) or BSLF/VH (69 patients) between January 2014 and December 2018 were reviewed retrospectively. The primary outcome was the subjective satisfaction rate evaluated by Patient Global Impression of Improvement, and the secondary outcomes included objective anatomical success rates, impact on disease-specific quality of life evaluated by the Pelvic Organ Prolapse/Urinary Incontinence Sexual Questionnaire-12, Pelvic Floor Distress Inventory-Short Form 20, and Pelvic Floor Impact Questionnaire 7, and surgical complications. Results: After a median follow-up of 35 months (range, 25–58 months), all patients in both groups demonstrated significant postoperative improvements in anatomical and functional outcomes (P<0.001). There were no significant differences in postoperative subjective and objective results, sexual satisfaction outcomes, or disease-specific quality of life between the BSHP and BSLF/VH groups, and similar incidence rates of intraoperative and postoperative complications were also recorded. Conclusions: The uterus-sparing BSHP procedure yielded noninferior anatomical and functional outcomes compared to the BSLF/VH procedure and could be adopted as an alternative to conventional hysterectomy-based native-tissue repair modalities for symptomatic apical-predominant uterovaginal prolapse.