9 results on '"Shuang Zheng"'
Search Results
2. Research Progress on the Effect of Muscle Protein Degradation on the Quality of Fermented Meat Products
- Author
-
Yun ZHENG, Shuang ZHENG, Tianshuo ZHOU, Wei BAO, Qi HAN, and Yanqing LI
- Subjects
fermented meat products ,microorganism ,protein degradation ,structure ,texture ,flavor ,Food processing and manufacture ,TP368-456 - Abstract
The long-standing fermented meat products were deeply popular with consumers due to the distinctive flavor and long storage life. From the point of protein degradation in the process of fermentation of meat products and based on the recent researches of fermented meat products, this paper discusses the factors affecting the muscle protein degradation including the function of microbial proteases and endogenous enzymes, and the protein hydrolysis activity of core microorganism. The structure changes of muscle protein during fermentation are analyzed, including secondary and tertiary structure and functional properties of protein. This paper furthermore summarizes how the muscle protein degradation during fermentation improving the texture properties and flavor of the fermented meat products, and deterioration of products due to excessive protein degradation. Finally, the perspectives of the future researches are listed in order to provide some meaningful ideas for the intensive study of the fermentation control of meat products.
- Published
- 2023
- Full Text
- View/download PDF
3. Pre-planning method of joint air defense resources for ship formations based on improved genetic algorithm
- Author
-
Xiadong LYU, Shuang ZHENG, and Jie CHEN
- Subjects
coordinated operations ,resource scheduling ,genetic algorithm ,mission resource planning ,Naval architecture. Shipbuilding. Marine engineering ,VM1-989 - Abstract
ObjectivesThe field of combat resource planning has gradually become the core point of intelligent decision guidance for future combat, and ensuring a better combat resource planning scheme is crucial to the guidance and implementation of actual combat. To this end, a resource planning method for the joint air defense of warship formations based on an improved genetic algorithm is proposed. MethodsFirst, the resources are serviced to improve their versatility; next, the articulation of multi-population genetic algorithms is used to represent multi-stage combat planning, and multi-dimensional quality of service (QoS) combat performance indicators are designed on the basis of multi-population genetic algorithms, thereby establishing a set of strengths and weaknesses for the evaluation of joint warfare planning programs. ResultsAfter the generalization of resources, the proposed method can be effectively combined with multi-population genetic algorithms to obtain a multi-stage optimal combat resource planning scheme. ConclusionThis study has certain reference value for the design and application of combat resource planning.
- Published
- 2023
- Full Text
- View/download PDF
4. Survey of Low Earth Orbit Satellite Communication Network Routing Technology
- Author
-
Shuang ZHENG, Xing ZHANG, and Wenbo WANG
- Subjects
low earth orbit satellite communication network ,routing ,business ,topological structure ,Information technology ,T58.5-58.64 - Abstract
Low earth orbit satellite communication network is an important part of the internet of everything era, but the characteristics of satellite constellation topology such as high dynamic, limited heterogeneous resources and unbalanced network service capacity make the traditional routing protocol applied to the ground network no longer suitable for low earth orbit satellite network.In this regard, scholars at home and abroad had carried out extensive research on low-orbit satellite routing technology.Firstly, the research status of low-orbit satellite routing was discussed from inter-satellite routing and satellite-to-ground routing, and the inter-satellite routing technologies with business as the core and topology as the core were compared in detail.On this basis, the key problems faced by low-orbit satellite routing strategies were analyzed, namely, high dynamic network topology, large inter-satellite link propagation delay, uneven network load and limited on-board resources.The future research of routing technology was prospected accordingly.
- Published
- 2022
- Full Text
- View/download PDF
5. Efficacy of Traditional Bigu Health-preserving Regimen in Healthy People: a Crossover Trial Using Real-world Data
- Author
-
Binyang HUANG, Xiaorui LIU, Luping YANG, Mengxiao LI, Shuang ZHENG, Anren ZHANG
- Subjects
fasting ,medicine, traditional ,science health maintenance ,healthy volunteers ,bigu ,real world study ,Medicine - Abstract
Background Bigu is a health-preserving regimen with a long history advocating appropriately reducing food intake in China, whose efficacy has been confirmed in practical treatment of some diseases currently. However, the applicability of Bigu in human experiments is poor due to nonforcible control of dietary intake in the participants. Objective To assess the effect of medicine-qi intake type of Bigu in healthy people using real-world data. Methods Two hundred and eighty healthy volunteers were recruited from Sichuan Nursing Vocational College from November 2018 to September 2020, and equally divided into two groups (A and B, with 140 cases in each) after being matched using k-nearest neighbor propensity score approach based on their demographics, and received a two-round Bigu trial: in the first round, group A received 10-day diet-restriction type of Bigu, while group B received 10-day medicine-qi intake in combination with diet-restriction type of Bigu. Then, after one-month washout period, the second round was conducted, during which group A received 10-day medicine-qi intake in combination with diet-restriction type of Bigu, while group B received 10-day diet-restriction type of Bigu. Comparisons were performed between two groups in terms of incidence of adverse reactions and number of dropouts in two rounds of Bigu, and subjective hunger sensation, weight, BMI, morning blood pressure, and fasting fingerstick glucose on the first and 10th days of two rounds of Bigu. Results After being assigned by PSM, there were 72 males and 80 females in group A; 61 males and 67 females in group B. In the first round, the incidence of adverse reactions in group A was 65.7% (92/140) , and the trial discontinuation rate was 48.6% (68/140) ; the incidence of adverse reactions in group B was 42.9% (60/140) , and the trial discontinuation rate was 20.0% (28/140) . The incidence of adverse reactions and trial discontinuation rate in group A were higher than those in group B, and the difference was statistically significant (P
- Published
- 2022
- Full Text
- View/download PDF
6. Hybrid Algorithm of Slime Mould Algorithm and Arithmetic Optimization Algorithm Based on Random Opposition-Based Learning
- Author
-
JIA Heming, LIU Yuxiang, LIU Qingxin, WANG Shuang, ZHENG Rong
- Subjects
slime mould algorithm (sma) ,arithmetic optimization algorithm (aoa) ,hybrid optimization ,random opposition-based learning ,Electronic computers. Computer science ,QA75.5-76.95 - Abstract
Slime mould algorithm (SMA) and arithmetic optimization algorithm (AOA) are new meta-heuristic optimization algorithms proposed recently. SMA has strong ability of global exploration, but the oscillation effect is weak in the late iteration. It is easy to fall into local optimum, and the contraction mechanism is not strong, which leads to slow convergence speed. AOA algorithm uses multiplication and division operator to update position, which has strong randomness and good ability to avoid premature convergence. To solve the above problems, this paper combines the two algorithms and uses random opposition-based learning strategy to improve the convergence speed, and proposes a hybrid algorithm of slime mould algorithm and arithmetic optimization algorithm based on random opposition-based learning (HSMAAOA) with superior performance and high efficiency. The improved algorithm retains the SMA’s exploration phase and the exploitation phase will be replaced by the multiplication and division operators, which improves the capacity of the algorithm and the ability to jump out of the local optimal solution. In addition, random opposition-based learning strategy is used to enhance the diversity of the improved algorithm population and improve the convergence speed. The experimental results show that the HSMAAOA algorithm has good robustness and optimization accuracy, and significantly improves the convergence speed. Finally, the applicability and effectiveness of HSMAAOA in engineering problems are verified through the design of welded beams and the design of pressure vessels.
- Published
- 2022
- Full Text
- View/download PDF
7. [Expressions and roles of TGFβ/Smad signal pathway in peritoneum of endometriosis].
- Author
-
Li CL, Leng JH, Li MH, Shi JH, Jia SZ, and Lang JH
- Subjects
- Epithelial Cells metabolism, Epithelium metabolism, Female, Fibroblasts metabolism, Humans, Peritoneal Cavity, Real-Time Polymerase Chain Reaction, Signal Transduction drug effects, Smad Proteins metabolism, Transforming Growth Factor beta1 metabolism, Up-Regulation, Endometriosis metabolism, Peritoneum metabolism, Transforming Growth Factor beta metabolism
- Abstract
Objective: To investigate the expression of transforming growth factor (TGF)-β and Smad pathway expressed in adhesion peritoneums in patients with endometriosis (EM)., Methods: From Dec. 2009 to Mar. 2010, 11 patients with EM [including 3 patients treated by gonadotropin releasing hormone agonist (GnRH-a) treatment] underwent laparoscopy surgery in Peking Union Medical College Hospital. In the mean time, 9 patients with benign ovarian tumor without EM and peritoneum adhesion were chosen as control. Peritoneum from lateral peritoneal cavity, adjacent from lesion and grossly normal was obtained during surgery. Microstructure of peritoneums was observed by HE staining and Masson staining. The expression of TGF-β1, TGF-β3, Smad 3 and Smad 7 in peritoneums were measured by immunohistochemistry staining and real-time PCR. The effect of GnRH-a on expressions of these markers were also analyzed., Results: (1) Microstructures of peritoneum: enlargement of nucleus of peritoneal mesothelial cells, thickening of connective tissue, distributive disorder of fiber, increasing numbers of fibroblast and inflammatory cells in EM were significantly different from those in control group. (2) The expression of TGF-β1 and 3 in peritoneum were 0.170 ± 0.020 and 0.110 ± 0.010 in EM group, which were significantly higher than 0.070 ± 0.010 and 0.050 ± 0.020 in control group. TGF-β1 was downregulated to 0.130 ± 0.030 and TGF-β3 was upregulated to 0.490 ± 0.090 by GnRH-a. (3) The expression of Smad 3 and 7 were 0.140 ± 0.020 and 0.110 ± 0.020 in peritoneum in EM group, which were significantly higher than 0.024 ± 0.004 and 0.014 ± 0.007 in control group. GnRH-a could upregualted the expression of smad 7 (0.040 ± 0.020), however, but no significant effect was observed on regulating Smad3 expression., Conclusions: The changes of microstructure and the alteration of TGF-β/Smad expression in peritoneum of endometriosis were observed. GnRH-a could regulate the expression of TGF-β and Smad.
- Published
- 2011
8. [Comparison of postoperative residue, recurrence and pregnancy outcome between laparoscopic and transabdominal myomectomy].
- Author
-
Li MH, Leng JH, Shi JH, Jia SZ, and Lang JH
- Subjects
- Adult, Female, Follow-Up Studies, Humans, Leiomyoma pathology, Middle Aged, Neoplasm Recurrence, Local epidemiology, Neoplasm, Residual, Postoperative Period, Pregnancy, Pregnancy Outcome, Retrospective Studies, Treatment Outcome, Uterine Neoplasms pathology, Gynecologic Surgical Procedures methods, Laparoscopy, Leiomyoma surgery, Uterine Neoplasms surgery
- Abstract
Objectives: To compare operative characteristics, postoperative residue, recurrence, and pregnancy outcome between laparoscopic myomectomy (LM) and transabdominal myomectomy (TAM), and investigate the favourable surgical approach in women with uterine myomas., Methods: From Jan 2008 to Dec 2008, 313 women undergoing LM and 148 women undergoing TAM were studied retrospectively in Peking Union Medical College Hospital. The patients' general information, including the largest diameter, mean numbers and weights of excised myomas, peri-operative characteristics (operating time, blood loss, and hemoglobin decrease), and residue, recurrence of myoma, and pregnancy outcome were compared and analyzed., Results: The largest diameter, mean numbers and mean weight of myomas removed were larger in TAM group [(7.6 ± 3.0) cm, (5.6 ± 5.5), (308 ± 364) g, respectively] than those in LM group [(6.8 ± 2.0) cm, (2.4 ± 2.1), (140 ± 109) g, respectively; P < 0.01]. While the extension of operating time [(89 ± 32) versus (74 ± 35) min], increased blood loss [(239 ± 251) versus (149 ± 252) ml] and hemoglobin decrease [(22 ± 14) versus (15 ± 12) g/L], and longer hospital stay [(6.4 ± 1.6) versus (4.4 ± 1.3) d] were observed in TAM group when compared with those in LM group (P < 0.01). However, the residue rate of LM and TAM was 2.6% versus 1.4% respectively (P = 0.5130); the recurrence rate of LM and TAM was 11.1% versus 12.3% (P > 0.05); the pregnancy rate of LM and TAM was 49.2% versus 9/13 separately, the difference was not statistically significant (P = 0.2330). The number of myomas removed was the significant risk factors associated with recurrence (OR = 2.805, 95%CI: 1.192 - 6.601, P = 0.0180). No uterine rupture occurred during pregnancy., Conclusions: Both LM and TAM are effective surgical approaches for the patients with leiomyoma who desire to pregnancy, or to retain the integrity of their uteruses. Most of uterine myoma could be treated through laparoscopy. The residue rate of LM is higher than that of TAM. However, the short term recurrence rates of LM and TAM are similar. Multiple myomas is the risk factor associated with recurrence after myomectomy. The pregnancy rates are comparable between LM and TAM groups.
- Published
- 2011
9. [Analysis of failure reasons for postoperative patients of spinal tuberculosis complicated with paraplegia of 32 cases].
- Author
-
Qin SB, Dong WJ, Fan J, Lan TL, Guan BQ, Xu SZ, and Guan H
- Subjects
- Adolescent, Adult, Aged, Child, Female, Follow-Up Studies, Humans, Male, Middle Aged, Reoperation, Retrospective Studies, Treatment Failure, Tuberculosis, Spinal complications, Tuberculosis, Spinal drug therapy, Paraplegia complications, Tuberculosis, Spinal surgery
- Abstract
Objective: To discuss the failure reasons of operation for spinal tuberculosis complicated with paraplegia and methods of the second operation., Methods: Spinal tuberculosis paraplegic patients (18 males, 14 females) were reviewed retrospectively. They have been treated with failing decompressive surgery from January 2001 to December 2006. Seventeen patients received anterior debridement surgery via transpleural approach while the other 15 patients received posterolateral decompression surgery via costotransverse approach. Twenty-two patients got chemotherapy after the surgery., Results: Twenty-three patients were treated by anterior debridement, decompression and graft placement via transpleural approach (9 received the single-stage posterior instrumentation). Five patients received posterolateral debridement and decompression via extrapleural approach. Two patients, recur focus be eliminated. Two patients were given sinus debridement surgery alone. All patients were given anti-tuberculosis chemotherapy. The paraplegia was recovered completely in 26 patients, and partly in 5 patients., Conclusions: Inadequate treatment results in defeated operative. The proper selection of operative modalities and timing on the basis of systematically anti-tuberculosis chemotherapy remains the best mode of therapy for spinal tuberculosis complicated with paraplegia. And it is also essential to choose a radical debridement surgery to decompress the spinal cord and to reconstruct the stability of spine.
- Published
- 2007
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.