Yifei Wei

Yifei Wei
University of Nottingham Ningbo China | Ningbo

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103
Publications
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1,139
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Publications

Publications (103)
Article
Full-text available
Chiral alcohols are among the most widely applied in fine chemicals, pharmaceuticals and agrochemicals. Herein, the Ru-monophosphine catalyst formed in situ was found to promote an enantioselective addition of aliphatic aldehydes with arylboronic acids, delivering the chiral alcohols in excellent yields and enantioselectivities and exhibiting a bro...
Article
Here, we demonstrated a transition metal-mediated/monophosphorus ligand system for the selective synthesis of ketones or chiral allylic alcohols in high yields/enantiomeric excess from the 1,2-addition of arylboronic acids to α,β-unsaturated aldehydes. Notably, isomerization of the chiral allylic alcohols to ketones was suppressed by the Ru-catalyz...
Chapter
Energy efficiency (EE) and spectral efficiency (SE) are two key pillars of 5G NR. Energy harvesting and transfer as a promising way to EE introduces new challenges to the guarantee of both EE and SE due to its natural causality. In this paper we consider a multi-cell network in which the base stations (BSs) are powered by renewable energy and propo...
Article
A highly Me2Zn-mediated catalytic enantioselective Reformatsky reaction of aldehydes and ketones with ethyl iodoacetate using a readily available prolinol ligand is reported. This reaction provides an efficient method for the construction of β-hydroxy esters in up to 98% yield and 95% enantiomeric excess (ee) value. A wide range of functional group...
Article
Introduction Recurrence rates after primary traumatic shoulder dislocation are distinctly high. Whether the early external immobilization(ER) is better than the internal immobilization (IR) is still controversial. Hypothesis To perform a systematic review of randomized clinical trials (RCTs) that assessed the ability of external immobilization to...
Article
In wheat/alien species hybrids, pairing homoeologous (Ph1) suppresses the pairing and recombination of wheat and alien chromosomes. Ph1b has been found to be the most effective allele in inducing meiotic homoeologous pairing/recombination and is widely used in gene introgression from wild Triticeae species into wheat. However, due to the poor agron...
Article
Introduction Recurrence rates after primary traumatic shoulder dislocation are distinctly high. Whether the early external immobilization (ER) is better than the internal immobilization (IR) is still controversial. Hypothesis To perform a systematic review of randomized clinical trials (RCTs) that assessed the ability of external immobilization to...
Article
Three EMS mutant wheat lines with varied mobility of Wx-A1 and Wx-B1 were identified. In the mutant lines M2-97-8 and M2-104-2, Wx-B1 showed slightly faster mobility compared to those of wild line, and Wx-A1 in the mutant line M2-101-1 has a greatly faster mobility, which co-migrates with Wx-D1. The results of gene sequencing indicated that SNP mut...
Article
患儿 女,3月19日龄,湖北孝感人,因发热4 h住院,外周血白细胞不高,胸X线片示右肺纹理略增粗,似有点片状阴影,咽拭子2019新型冠状病毒(2019-nCoV)核酸检测呈阳性,2019-nCoV感染诊断成立,符合普通型。经积极治疗15 d后痊愈出院。患儿呼吸道症状出现较晚,症状较轻。患儿父母在患儿发病7d后2019-nCoV检测阳性,提示家庭内传播是2019-nCoV感染的重要传播途径。患儿虽然连续3次咽拭子转阴,同期的痰及粪便仍可检出2019-nCoV核酸。患儿母亲无发热及呼吸道症状,但胸部CT发现左肺及右上肺渗出性病变,提示肺部病变可见于无症状2019-nCoV感染者。.
Article
患儿 女,3月19日龄,湖北孝感人,因发热4 h住院,外周血白细胞不高,胸X线片示右肺纹理略增粗,似有点片状阴影,咽拭子2019新型冠状病毒(2019-nCoV)核酸检测呈阳性,2019-nCoV感染诊断成立,符合普通型。经积极治疗15 d后痊愈出院。患儿呼吸道症状出现较晚,症状较轻。患儿父母在患儿发病7 d后2019-nCoV检测阳性,提示家庭内传播是2019-nCoV感染的重要传播途径。患儿虽然连续3次咽拭子转阴,同期的痰及粪便仍可检出2019-nCoV核酸。患儿母亲无发热及呼吸道症状,但胸部CT发现左肺及右上肺渗出性病变,提示肺部病变可见于无症状2019-nCoV感染者。.
Article
Full-text available
The new injector SSC-LINAC is under design and construction to improve the efficiency and intensity of beams for the Separated-Sector Cyclotron (SSC). This will be accomplished with a normal conducting radio-frequency quadrupole (RFQ) accelerator. To match with the SSC, the RFQ must be operated on Continuous Wave (CW) mode with a frequency of 53.66...
Article
A vast amount of information has been produced in recent years, which brings a huge challenge to information management. The better usage of big data is of important theoretical and practical significance for effectively addressing and managing messages. In this paper, we propose a nine-rectangle-grid information model according to the information...
Article
In article number 1900314, Weiling Luan and co‐workers develop a novel strategy to synthesize highly luminescent bovine‐serum‐albumin‐encapsulated gold nanoclusters (BSA‐AuNCs) with a high quantum yield of 23%. When the water‐soluble BSA‐AuNCs enter tumor cells, they can sensitively detect the amount of glutathione present.
Article
Protein‐protected gold nanoclusters with emission in the near‐infrared wavelength range have been widely considered for applications in biomedical fields. However, their quantum yield (QY) remains low, thus limiting their practical applications. Herein, a novel strategy to synthesize bovine serum albumin–encapsulated gold nanoclusters (BSA‐AuNCs) w...
Conference Paper
Full-text available
The High Energy Photon Source (HEPS) is the first high-energy diffraction-limited storage ring (DLSR) light source to be built in China, with a natural emittance of a few tens of pm rad and a circumference of 1360.4 m. After 10 years' evolution, the accelerator physics design of the HEPS has been basically determined, with the ring consisting of 48...
Article
Full-text available
In this paper, we explored the preparation process of gold nanoclusters (AuNCs). AuNCs was synthesized by micro-reaction process and compared with the traditional one-pot strategy. The water-soluble AuNCs was prepared by reducing hydrogen tetrachloroaurate hydrate (HAuCl4) in aqueous solution with 11-mercaptoundecanoic acid (MUA) as ligand and redu...
Article
A novel type of perforated travelling wave pick-up/kicker structure was developed for CSRe stochastic cooling which was originally proposed by F. Caspers at CERN. The simulated and measured results of shunt impedance of the slotted travelling wave pickup electrode are in reasonable agreement. In December 2015 stochastic cooling of heavy ions was su...
Article
A finite element simulation model of tumbling test is established, Through the analysis of motion parameters and component deformation, the reliability of finite element model is verified. The key energy absorption and bearing parts are determined by the structural deformation, force, energy and other aspects. The deformation mode of thin- walled b...
Article
A finite element simulation model for the tumbling test of a minivan is established, with its reliability verified by the benchmarking on motion attitude, motion parameters and component deformation. According to the test and simulation results of deformation, force and energy absorption of the vehicle, two cross beams of roof and left and right A-...
Article
An iridium catalyst (2.5 mol %) generated in situ from [Ir(coe)2Cl]2 and a nitrogen phosphorus ligand was efficient in the asymmetric ring-opening reactions of low-activity azabenzonorbornadiene with various aliphatic and aromatic amines, providing the corresponding chiral vicinal 1,2-diamine scaffolds in high yields (up to 98%) and excellent enant...
Conference Paper
Full-text available
The High Energy Photon Source (HEPS) is a 6-GeV, ul-tralow-emittance kilometre-scale storage ring light source to be built in China. In this paper, the progress of the error and correction effect study on HEPS over the past one year will be presented, including error requirement and correction progress update. And beam performance evaluation with s...
Article
Introduction Obstructive sleep apnea (OSA) (OMIM: 107650) is a common disorder characterized by recurrent episodes of partial or complete upper airway obstruction that lead to sleep fragmentation, daytime sleepiness, and repeated episodes of chronic intermittent hypoxia. OSA may be a clinical symptom of Mendelian diseases, such as auriculocondylar...
Article
Introduction Obstructive sleep apnea (OSA), a condition leading to chronic intermittent hypoxia (CIH), is an independent risk factor for cardiovascular disease and type 2 diabetes and is correlated with insulin resistance. Insulin stimulates production of nitric oxide (NO) in vascular endothelial cells through the IRS-1/PI3K/Akt/eNOS pathway (IRS-1...
Article
Introduction Obstructive sleep apnea (OSA) is a common disorder characterized by recurrent episodes of partial or complete upper airway obstruction.OSA is influenced by multiple factors. Having a first-degree relative with OSA increases the risk of OSA by more than 1.5-fold.Genetic susceptibility to OSA remains incompletely characterized.Several ge...
Article
Introduction The early prediction of atherosclerosis is important in the management of obstructive sleep apnea patients(OSA). MicroRNA plays a vital role in the evolution of OSA and atherosclerosis. Its differential expression may therefore serve as a diagnostic and prognostic biomarker of atherosclerosis in OSA patients. The aim of this study was...
Article
Objective To discuss the establishment of cerebral venous sinus thrombosis (CVST) model in rabbits by local application of ferric chloride at sinuses sagittalis superior (SSS) combined with thrombin injection, and to evaluate its feasibility and application value. Methods A total of 39 New Zealand white rabbits were randomly and equally divided int...
Article
Objective: To explore the efficacy and safety of venous sinus stenting in the treatment of refractory idiopathic intracranial hypertension (IIH) complicated with venous sinus stenosis. Methods: We reviewed our clinical database for 18 patients with resistant or fulminant IIH and cerebral venous sinus stenosis, who underwent placement of venous sinu...
Article
Densely deployment of various small-cell base stations in cellular networks to increase capacity will lead to heterogeneous networks (HetNets), and meanwhile, embedding the energy harvesting capabilities in base stations as an alternative energy supply is becoming reality. How to make efficient utilization of radio resource and renewable energy is...
Article
Seven new furostanol saponins have been isolated from the rhizomes of Smilax davidiana. Their structures were established by 2D NMR spectroscopic techniques ((1)H,(1)H-COSY, NOESY, HSQC and HMBC), mass spectrometry and comparison with the literature. The isolated compounds were subjected to evaluate anti-inflammatory and cytotoxic activities in vit...
Patent
The present invention discloses a multi-hop cellular network of low-power transmission apparatus and a method comprising: generating a directed graph, determine the base station, the terminal and the relay based on the transmission path between the multi-hop cellular network; to determine the transmission path the rate limiting, capacity constraint...
Conference Paper
This paper proposes an active queue management mechanism, considering the node’s own ability and its importance in the network to set the queue threshold. As the network load increases, local congestion of mobile ad hoc network may lead to network performance degradation, hot node’s energy consumption increase even failure. If small energy nodes co...
Article
The explosive wireless data service requirement accompanied with carbon dioxide emission and consumption of traditional energy has put pressure on both industria and academia. Wireless networks powered with the uneven and intermittent generated renewable energy have been widely researched and lead to a new research paradigm called green communicati...
Article
Since the outbreak of zika virus (ZIKV), many studies have proved that fetal pathologic microcephaly and brain damage is associated with ZIKV infection during pregnancy. Ultrasound examination of fetal head circumference and intracranial structure has important value in the diagnosis of fetal microcephaly. Ultrasonography combined with ZIKV tests w...
Patent
(Google translation from Chinese) The embodiment of the invention discloses a method and device of link management facing green energy resource. The method comprises: detecting the volume of communication business in a network; when the volume of communication business in the network exceeds a preset business volume threshold, constructing a target...
Article
ZSM-5 supported copper-gold nanocatalyst (CuAu/ZSM-5) was prepared and investigated in the direct partial oxidation of methane to methanol. The reaction of methane with air was performed at the low temperature range of 333-423 K. Small-sized metal nanoparticles around 6.5 nm were well dispersed on the surface of ZSM-5. The presence of gold in CuAu/...
Article
Industry-Finance group is a new group type that comes from the mutual alliance of capital and management between the industry and finance organizations. It is a self-organized synergy evolutionary system that combines financial with industrial innovations. The paper constructs a self-organization model capable of analyzing the evolutionary mechanis...
Article
An Industry-Finance group is a new type of enterprise that resulted from the mutual alliance of capital and management between industrial and financial organizations, as well as a consequence of self-organization co-evolution on industrial-financial integration from claims model to equity model. Based on synergetics and self-organization theory, th...
Article
In order to describe the network evolving features for cognitive radio ad hoc networks (CRAHNs) and improve the network performance, we propose a network evolving model with preference and anti-preference based on complex network theory, aiming at optimizing network structures considering the residual node energy, the time and location varying spec...
Article
Wheat and rapeseed are the major grain and oil crop in China and their sowing dates are closer. Seed feeding device is the core component of air-assisted centralized metering device which is capable of handling a wide range of seeds with different sizes and shapes. In order to improve the versatility and use efficiency of air-assisted centralized m...
Article
The rapeseed precision seeding has the advantages of saving labor, time and cost, and high productivity and so on, and the rapes under the precision seeding have relatively consistent maturity, which are suitable for mechanized harvest. The rapeseed direct seeding is an important technical way to realize the sustainable development of rapeseed indu...
Article
In order to investigate the initiation modes of hydro-fractures in horizontal wells, Laboratory hydraulic fracturing test was carried out using outcrop shelly limestone to simulate horizontal well hydraulic fracturing. The phenomena of fracture initiation and propagation around the horizontal wellbore were described and analysed by adding tracer to...
Patent
(Google translation from Chinese) The embodiment of the present invention discloses a data transmission method and apparatus which comprises determining an encounter time interval between two adjacent nodes on the path for each path between the holding node and the requesting node, And calculating the path weight of the path by using the matching...
Patent
(Google translation from Chinese) The present application discloses a cognitive routing protocol and implementation. Routing system according to the present application include: network status information acquisition module, access to information and communication node information associated with the network node from the network node; routing stra...
Article
Expanded graphite (EG) supported palladium nanocatalysts (Pd-EG) were synthesized by wet-impregnation reduction method with the aid of a polymer stabilizer. The catalysts were characterized by various techniques including X-ray diffraction (XRD), transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS). The catalytic activi...
Article
The existence of bedding planes is the fundamental cause of the anisotropy of the mechanical behaviors, the strength and the failure modes of shale formations and is also one of the main reasons for borehole instability of horizontal wells. In order to analyze the mechanical properties of bedding planes and the anisotropy of shear strength, direct...
Article
The genus Agrocybe is a very important economical mushroom with only 10 reported species in China. Agrocybe tuberose strain GSM-12 in the present study is a newly recorded species in China and was isolated from Yanqing District, Beijing. The goal of this work was to conduct further artificial domestication cultivation of the new mushroom species to...
Article
In southwest China, lots of dark red coal-fired ashes with certain amount of hematite are generated because of the presence of pyrites in raw coals. It is necessary to recycle this part of iron resources in coal-fired ashes with relatively high content of iron. Iron recycling of circulating fluidized bed combustion (CFBC) fly ashes by magnetizing r...
Article
Objective: To explore the clinical value of CEUS guided percutaneous biopsy in patients with pancreatic space occupying lesions. Methods: Totally 49 patients with pancreatic masses underwent percutaneous biopsy guided by CEUS. All of the biopsy targets could not be confidently localized with conventional ultrasound. When the acquired tissues could...
Article
Using zinc chloride and sodium hydroxide as the reactants, needle-, flower-, rod-and jujubestone-like ZnO micro-/nano-crystals were prepared via a low-temperature liquid phase method by controlling the composition of precursor solution. SEM, EDS, XRD, FT-IR, UV-Vis DRS and TG-DTA were used to characterize the products. Possible formation mechanism...
Article
We propose an orientation average method to evaluate residual stresses in polycrystalline thin films. Bi3.15(Eu0.7Nd0.15)Ti3O12 was used to verify our approach, with films prepared by metal organic decomposition at various annealing temperatures. The mechanical properties and microstructure were characterized by nanoindentation and X-ray diffractio...
Article
Photoplastic effect (PPE) of individual ZnS nanobelt with different width-to-thickness (w/t) ratios was investigated by using a nanoindenter in conjunction with an incident ultraviolet light source system. The results show that the positive and negative PPEs are observed for the w/t ratios 4.9–9.6 and 3.2–4.1. At the peak indentation loads 20–50 μN...
Article
The presence of organic micropollutants in an aquatic ecosystem impacts directly or indirectly to biota and human being, which results in an increasing demand for the detection of organic micropollutants. In this review we examine recent development and current status of electrochemical detection of organic micropullutants using electrochemical sen...
Article
The presence of trace heavy metals ions in an aquatic ecosystem impacts directly or indirectly to biota and human being, which results in an increasing demand for the detection of heavy metal contaminants. This review examines recent development and current status of electrochemical detection of heavy metal ions using nanomaterials modified electro...
Article
Introduction The continuously growing demand for ubiquitous network access has led to the rapid development of wireless cellular networks during the last decade. The subscriber number and service traffic in cellular networks have explosively escalated. It is reported that there are now more than 5 billion mobile phone connections worldwide, and mor...
Conference Paper
In wireless mobile environment, the wireless channels are unreliable and change fast due to fading and users' movement. Since the wireless channel state is not directly observable at the receiver but is embedded in the received signal, this paper uses hidden Markov model (HMM) to model and predict the state of available relays, and considers relay...
Article
National meteorological communication system is the main project in CMA. For improving system credibility,the system uses the load balance technology to build cluster system. The communication servers make use of cluster technology to ensure that all of the servers in the cluster system can share the storage. In this article, cluster and cluster fi...
Article
Purpose: Investigations over the past few years have demonstrated some of the benefits and shortfalls of tomosynthesis in radiation therapy for patient positioning or dose tracking. Tomosynthesis generates excellent image quality in one reconstruction plane; however, there is a loss of edge and frequency information in the additional planes due to...
Article
Purpose: Investigations over the past few years have demonstrated some of the benefits and shortfalls of tomosynthesis in radiation therapy for patient positioning or dose tracking. Tomosynthesis generates excellent image quality in one reconstruction plane; however, there is a loss of edge and frequency information in the additional planes due to...
Article
A new type of composite catalyst Mn(III) TPP-Au/SiO2 was obtained by immobilizing manganese tetrayphenylporphrin on 5%Au/SiO2 catalyst, with mercaptopyridine as bridging agent, which has sulfhydryl and pyridyl groups. The as-prepared catalyst was characterized by Fourier transform infrared spectroscopy (FT-IR), elemental analysis (EA), and X-ray ph...
Article
The research focused on heavy metal concentrations of soil and plants in Wenzhou's tanning zone in Zhejiang Province of East China and relationship with soil pollution. The available plant germplasm resources for Cr contaminated soil restoration were initially definited. Twenty-five species belonging to 13 families were found in the polluted area,...