Development of multi-functional anchorage support dynamic-static coupling performance test system and its application

In underground engineering with complex conditions,the bolt(cable)anchorage support system is in an environment where static and dynamic stresses coexist,under the action of geological conditions such as high stresses and strong disturbances and construction conditions such as the application of high prestress.It is essential to study the support components performance under dynamic-static coupling conditions.Based on this,a multi-functional anchorage support dynamic-static coupling performance test system(MAC system)is developed,which can achieve 7 types of testing functions,including single component performance,anchored net performance,anchored rock performance and so on.The bolt and cable mechanical tests are conducted by MAC system under different prestress levels.The results showed that compared to the non-prestress condition,the impact resistance performance of prestressed bolts(cables)is significantly reduced.In the prestress range of 50–160 k N,the maximum reduction rate of impact energy resisted by different types of bolts is 53.9%–61.5%compared to non-prestress condition.In the prestress range of 150–300 k N,the impact energy resisted by high-strength cable is reduced by76.8%–84.6%compared to non-prestress condition.The MAC system achieves dynamic-static coupling performance test,which provide an effective means for the design of anchorage support system.

Application of Tension Leg Platform Combined with Other Systemsin the Development of China Deepwater Oil Fields

The development of deepwater oil fields has reached a new stage with the dramatic increase in water depth and the recent increasing demands of the economic development in the filed. The use of a Tension Leg Platform （TIP） combined with other systems, such as Floating Production Storage and Offloading （FPSO） system, Floating Production Unit （FPU） system, Tender Assisted Drilling （TAD） system, etc., has drawn the industry attention and increased significantly in the past few years. For the areas lacking of pipeline system, the use of TIP（s） combined with FPSO has been chosen to efficiently develop the deepwater fields. The TIP with a Tender Assisted Drilling system significantly reduces the payload of the platform and reduces the investment in the TIP system substantially. This opens the door for many new deepwater field developments to use the tension leg platform. The advantage of the TIP combined with a TAD system is more significant when several TIPs are used for the continuous development of the field. One of the applications for the TIP with a tender assisted drilling system can be in the development of an offshore marginal field. Owing to the increase of water depth, the conventional fixed platform model for the exploration of those fields becomes uneconomical. It also would be too expensive to use a large TIP structure for those marginal fields due to the large amount of initial investment. The TIP system with tender assisted drilling can be used to develop those fields economically. There are many marginal fields in China offshore, especially in shelf areas. The application of this field developing model, combined with the existing field developing experience in China, will open the door for many marginal field developments. This paper will review the application of the combined TIP system through some examples of completed/ongoing projects, and major technical issues encountered in those practices. The potential application of this technology in China deepwater development will be discussed in the end.

Development of an ultra-high-pressure rotary combined dynamic seal and experimental study on its sealing performance in deep energy mining conditions

With the continuous development of deep oil and gas,minerals,geothermal resources,and other resources,there are increasingly more stringent requirements for equipment.In particular,the ultra-highpressure dynamic seals of deep mining device need to be developed.Therefore,considering the use of dynamic seals in unique deep mining environments,an ultra-high-pressure rotating combined dynamic seal was designed and developed and its sealing performance was experimentally measured and analyzed.The results show that the experimental device can operate stably under a pressure of up to150 MPa and a rotating speed of 76 r/min,and can also operate normally under a rotating speed of up to 140 r/min and a sealing pressure of 120 MPa.During the operation of the ultra-high-pressure rotating combined dynamic seal,the sealing ring does not show obvious damage,which vouches for its sealing performance.No leakage of flow and pressure was detected in the all seal structures within the sealing pressure range of 0-150 MPa.Therefore,the dynamic sealing performance of the device is intact under ultra-high-pressure conditions and can be applied in deep mining environments at a certain depth.The research and development of this device can aid future deep energy exploration and exploitation.

The status and development strategy of coalbed methane industry in China

To achieve the goals of carbon peaking and carbon neutrality under the backgrounds of poor resource endowments, weak theoretical basis and other factors, the development of the coalbed methane industry of China faces many bottlenecks and challenges. This paper systematically analyzes the coalbed methane resources, key technologies and progress, exploration effect and production performance in China and abroad. The main problems are summarized as low exploration degree, low technical adaptability, low return on investment and small development scale. This study suggests that the coalbed methane industry in China should follow the “two-step”(short-term and long-term) development strategy. The short-term action before 2030, can be divided into two stages:(1) From the present to 2025, to achieve new breakthroughs in theory and technology, and accomplish the target of annual production of 10 billion cubic meters;(2) From 2025 to 2030, to form the technologies suitable for most geological conditions, further expand the industry scale, and achieve an annual output of 30 billion cubic meters, improving the proportion of coalbed methane in the total natural gas production. The long-term action after 2030 is to gradually realize an annual production of 100 billion cubic meters. The strategic countermeasure to achieve the above goals is to adhere to “technology+management dual wheel drive”, realize the synchronous progress of technology and management, and promote the high-quality development of the coalbed methane industry. Technically, the efforts will focus on fine and effective development of coalbed methane in the medium to shallow layers of mature fields, effective development of coalbed methane in new fields, extensive and beneficial development of deep coalbed methane, three-dimensional comingled development of coalbed methane, applying new technologies such as coalbed methane displacement by carbon dioxide, microwave heating and stimulation technology, ultrasonic stimulation, high-temperature heat injection stimulation, rock breaking by high-energy laser. In terms of management, the efforts will focus on coordinative innovation of resource, technology, talent, policy and investment, with technological innovation as the core, to realize an all-round and integrated management and promote the development of coalbed methane industry at a high level.

Efficacy Analysis of an Experience on Development of the Combination Therapy Protocol for Endometriosis Management

Purpose: Endometriosis can be managed effectively by medication, surgery, or a combination of both. Numerous studies have been conducted on surgical and medication treatment options, but their results are still under discussion. Therefore, we performed a study to develop a combinational treatment for various stages of endometriosis. Methods: Over a 3-year period, 218 documented endometriosis patients were classified in 4 stages. After first laparoscopy (with electrocoagulation and adhesion removal for stages I to III), the patients were treated with GnRH analogs (Gonadotropin Releasing Hormone Agonist-375 mg of Decapeptyl) for 3, 6 & 6 months, respectively. The second and third laparoscopy procedures were performed after 3 and 6 months, with add-back therapy. The treatment was evaluated by direct observation based on laparoscopic view and the pain relief was measured by the VAS (Visual Analogue Scale) after the first step of medication for patients of stages I-III. Results: After 3 months, 70/76 patients (91.9%) with stage-I endometriosis showed complete recovery (six cases after 6 months) while 65/72 and 32/43 cases with stage-II and -III (90.3 and 74.4%), respectively, showed complete recovery after 6 months of treatment. The remaining patients had GnRH treatment for another 3 months, and all showed a complete recovery after 9 months. Furthermore, 12 of the patients with stage-IV symptoms were candidates for laparoscopy or laparotomy, and their treatment response rate was 55.6%. The pain relief was significant after the combinational treatment in patients with stages I-III (P = 0.0001). Conclusion: Our study showed efficacy of the developed protocol for the endometriosis management.

Land use suitability analysis for town development planning in Nanjing hilly areas: A case study of Tangshan new town, China

Land use suitability analysis plays an important role in sustainable land use and solving environmental problems caused by rapid urban development.A land use suitability mapping approach for town development planning in hilly areas was constructed based on two multi-criteria evaluation methods:Weighted Linear Combination(WLC)and Ordered Weighted Averaging(OWA),to comparatively evaluate and map land use suitability of Tangshan new town in Nanjing,China.Fourteen evaluation factors related to topographic,environmental,socio-economics and historical sites data were used as suitability criteria.The analytic hierarchy process(AHP)method and GIS techniques were integrated into the evaluation models to create the land use suitability map for town development planning.The results of WLC approach showed that 11.4%of the total area is highly suitable while the 48.6%is unsuitable.The results of WLC and OWA approach showed the distribution of degree of land use suitability is almost the same.The areas located at the southern and eastern flat regions are highly suitable for land use,whereas the areas close to the mountain forests,steep slopes,waters,and hot springs,have lower suitability for land use.Sensitivity analysis indicated that the suitability results of the two proposed methods are robust.Indirect validation was achieved by mutual comparison of suitability maps derived from the WLC and OWA methods.It demonstrated that the overall agreement is 90.81%and kappa coefficient is 0.81,indicating that both methods provide very similar spatial suitability distributions.By overlaying the resultant map with the previous master plan map of Tangshan new town,the overlay map once again indicated a satisfactory ecological fit between the two maps.At last,several recommendations are proposed aiming at improving the long-term town development plan for Tangshan new town.

Developing high-efficiency base editors by combining optimized synergistic core components with new types of nuclear localization signal peptide

The clustered regularly interspaced short palindromic repeats(CRISPR)–CRISPR-associated protein(Cas) system has been widely used for genome editing. In this system, the cytosine base editor(CBE) and adenine base editor(ABE) allow generating precise and irreversible base mutations in a programmable manner and have been used in many different types of cells and organisms. However, their applications are limited by low editing efficiency at certain genomic target sites or at specific target cytosine(C) or adenine(A) residues. Using a strategy of combining optimized synergistic core components, we developed a new multiplex super-assembled ABE(sABE) in rice that showed higher base-editing efficiency than previously developed ABEs. We also designed a new type of nuclear localization signal(NLS) comprising a FLAG epitope tag with four copies of a codon-optimized NLS(F4NLS^(r2)) to generate another ABE named F4NLS-sABE. This new NLS increased editing efficiency or edited additional A at several target sites. A new multiplex super-assembled CBE(sCBE) and F4NLS^(r2) involved F4NLS-sCBE were also created using the same strategy. F4NLS-sCBE was proven to be much more efficient than sCBE in rice. These optimized base editors will serve as powerful genome-editing tools for basic research or molecular breeding in rice and will provide a reference for the development of superior editing tools for other plants or animals.

Current Development of Hand-painted Pastel Animation Short Film

With the rapid development of audio-visual language, production of traditional hand-painted animation has failed to keep pace with the times. This paper discussed the current foreign and domestic researches on animation, and found that the researches still focused on application of technology or theories of animation arts. The study tried to integrate traditional hand painting with computer technology, produce hand-painted pastel animation, enrich the artistic forms of hand-painted pastel animation short fi lm, improve the effi ciency of handpainted pastel production, so as to form a complete artistic realization theory system of hand-painted pastel animation short fi lm, and provide a technological and theoretical support for the development of traditional hand-painted animation.

Nursing Effects of Medical Treatment Combination on Patients at High Risk of Developing Pressure Ulcers at Rural Homes

Objective:To explore the nursing effects of medical treatment combination on patients at high risk of developing pressure ulcers at rural homes.Methods:From January 2018 to December 2018,86 patients at high risk of developing pressure ulcers at rural homes who were in Wenjiang Hospital were randomly divided into a control group and an observed group.The control group received the routine publicity and education and visiting,while the observed group adopted the cooperative nursing model of medical treatment combination.Then compare the healing status and nursing satisfaction of the two groups.Results:Of the 43 patients with pressure ulcers in the observed group,18 had been in the second stage of pressure ulcers and 16 had been healed;14 had been in the third stage of pressure ulcers and 8 had been healed;11 had been in the fourth stage of pressure ulcers and 5 had been healed.The nursing satisfaction of the patients in the observed group was 95.35%.Conclusion:Conducting medical treatment combination on patients at high risk of developing pressure ulcers at rural homes can effectively improve the patients’and their families’awareness of pressure ulcer nursing,standardize their nursing behaviour,help recover the patients themselves and promote the patients’satisfaction.

大庆油田化学驱油体系研究现状及发展方向

大庆油田经过多年的研究和实践,创新了聚合物黏弹性理论、表面活性剂与原油匹配关系理论,研制生产出了系列部分水解聚丙烯酰胺、烷基苯磺酸盐、石油磺酸盐,形成第一代化学驱油体系,推进了大庆油田化学驱工业化进程,使化学驱成为油田有效开发主导技术之一。随着大庆油田化学驱开发对象逐渐变差,建立聚合物分子构效关系和稀体系相态转化理论,研究出了系列抗盐聚合物和界面位阻表面活性剂,形成第二代高效化学驱油体系,推动化学驱提质增效。为更大幅度地提高采收率、降低化学剂成本,拓展化学驱应用领域,绿色环保、智能高效、成本低廉的化学驱油体系是今后化学驱油体系发展的主要方向。

高含水油田“二三结合”转换时机优化

针对现有转换时机研究方法无法满足高含水期老油田“二三结合”转换时机优化设计需要的问题,在综合分析三次采油转换时机和技术经济评价方法的基础上,考虑工程技术可行性和经济效益可行性,提出综合考虑技术、经济、社会价值的“二三结合”全生命周期开发价值链理念,建立高含水期老油田“二三结合”全生命周期效益稳产开发价值链模型,并实例分析“二三结合”转换时机对油藏最终采收率和生命周期的敏感性。结果表明,稳产、效益、生命周期是“二三结合”全生命周期效益稳产开发的主要考虑因素,转换时机对效益和稳产的影响是相对立的。

新疆油田浅层超稠油SAGD高效低碳开发技术研究与展望

针对“双碳”目标背景下超稠油开发高能耗与油田高质量发展矛盾日益加剧的问题,新疆油田通过SAGD机理研究与现场实践,在维持蒸汽腔高效扩展,突破储层渗流屏障遮挡,提高浅薄层驱泄复合效率,实现水平井长水平段高效均衡产液等方面持续攻关,取得显著效果。采用气体辅助技术,实现蒸汽腔隔热保压增能,油汽比可提高20%;利用立体井网及储层升级扩容技术,改善Ⅲ类超稠油油藏渗流特征,泄油速度可增大20%~40%;采用全密闭生产方式,VHSD产液温度由100℃上升至150℃,采油速度提高50%;深化热采流量控制器(FCD)机理研究,完善油藏-井筒耦合优化设计方法,水平井水平段动用程度可提高20%。“十四五”期间,新疆油田将深化溶剂辅助SAGD、无水SAGD和控温水热裂解等技术研究,逐步完善浅层超稠油低碳高效开发技术系列,该研究可为稠油油藏开发提供借鉴。

推进中华传统法律文化创新性发展研究

把马克思主义基本原理同中国具体实际、同中华优秀传统文化相结合,是中国共产党领导人民取得革命和建设成功的“最大法宝”,是党在探索中国特色社会主义道路中得出的规律性认识。“两个结合”是传统文化创新发展的内在动力,为中华传统法律文化创新性发展提供了契机。“第二个结合”是中国又一次的思想解放。“第二个结合”让马克思主义成为中国的,中华优秀传统文化成为现代的,未来需要以“第二个结合”为科学指南建设中华民族现代文明。“第二个结合”铸就了中国式现代化的文化形态,提升了中华传统法律文化创新性发展的思想方法,增强了中华传统法律文化的国际影响力。因此,推进中华传统法律文化创新性发展,应构建科学完备的中华民族共同体理论体系,建构中国自主的法学知识体系,建构中国自主的知识产权体系,构建中国自主的中华文明对外传播体系。

大力培育新质生产力提升饲料工业高质量发展水平

我国饲料工业已进入转型升级和高质量发展时期。要实现饲料工业的高质量发展和全生产要素生产效率的显著提升,就必须大力培育和发展新质生产力。文章介绍了新质生产力的概念和发展的四个维度,详细介绍了饲料工业高质量发展所需新质生产力的四个组成部分及其优化组合,包括新型劳动者、新劳动对象、新劳动工具、公益性新型基础设施平台建设,并对新型劳动者-饲料工程技术人才培养提出了建议。

“两个结合”赋能高校思政课的三维向度

“两个结合”作为习近平新时代中国特色社会主义思想的重要组成部分,是走稳走实中国特色社会主义道路极为重要的指导方略,也是赋能高校思政课的关键抓手。高校要从“两个结合”赋能引领思政课高质量发展、强化立德树人实效、坚定学生理想信念这一价值向度领悟“两个结合”的价值意蕴;从立足点、出发点、切入点这一本体向度探寻“两个结合”赋能思政课的现实逻辑;从以“两个结合”和“六个必须坚持”为指导的实践向度探析“两个结合”为思政课高度赋能的实践路径,从而进一步挖掘“两个结合”的深层力量,加强“两个结合”对思政课的科学引导、实践指导,开创思政课高质量发展新局面。

城市交通拥堵组合治理政策仿真研究

为探究不同交通拥堵治理政策的作用与效果,从交通发展战略、交通需求管理、交通费用调节3个方面设计了16种政策模拟情形,通过Vensim PLE软件进行仿真模拟。结果表明,交通需求管理是治理交通拥堵最有效的方式,其次是交通发展战略和交通费用调节,该实验结果为城市交通优化提供了有益参考。未来治理城市交通拥堵时,应注重调节交通需求和供给之间的矛盾,综合运用土地规划、交通管理等手段,科学控制交通需求总量、出行方式和时空分布,以实现供需在不同阶段和层次上的相对平衡,从而确保城市交通系统的可持续发展。

医养结合嵌入河南省社区居家养老的发展策略

河南省健康养老发展正进入快车道,规划引导医养结合嵌入社区居家养老符合省情和老年群体需要。针对发展嵌入式养老面临的政策模糊、筹资匮缺、医护流失等问题,提出如下建议:政府主导,加强筹资运营监督管理;社会参与,打通资源良性嵌入路径;队伍优化,培养人才和提高待遇并举等。

“两个结合”视域下愚公移山精神的传承与发展

“两个结合”是马克思主义中国化时代化的历史经验总结。中国共产党遵循马克思主义中国化时代化的发展逻辑,传承和弘扬愚公移山精神,使其在我国革命、建设和改革的伟大实践中发挥,重要的精神支撑作用。在新时代的长征路上,继续弘扬愚公移山精神仍需要以“两个结合”重要思想为指导,更加增强愚公移山精神的实践性、注重愚公移山精神的传承性以及凸显愚公移山精神的时代性。

建设海洋强国背景下船舶与海洋工程专业实践教学系统

为培养本科生的工程实践创新能力,开展了船舶与海洋工程专业实践类课程体系建设,建设具有“虚实结合、科教融合、开发海油”特色的实践教学资源库,搭建了“双创—竞赛—实习—设计”递进式实践创新培养平台。基于该平台,学生通过参加各级学科竞赛和创新实践活动,激发内驱力、聚焦任务、主动探索,实现了学习产出。这些举措有效提升了学生的实践创新能力,实现了“智能+教学”向“智能+发展”的转化。

“两个结合”:中国特色社会主义发展的内在逻辑

中国共产党在领导人民一百多年革命、建设和改革的长期奋斗中,特别是改革开放以来的40多年,始终坚持把马克思主义同中国现代化建设实际相结合,始终坚持把马克思主义同中华优秀传统文化相结合,创造性地从理论上和实践上丰富发展了科学社会主义,开辟了中国特色社会主义建设发展的新路,用一系列重大成就书写了世界社会主义发展的“中国篇章”。纵观中国特色社会主义建设发展的伟大历史进程,蕴涵贯穿着极其深刻的理论创新逻辑、历史发展逻辑、实践探索逻辑、目标导向逻辑、价值追求逻辑,极大深化了对社会主义建设经验的规律性认识,更加彰显了社会主义的制度优势和价值旨归。建设社会主义现代化强国,实现中华民族伟大复兴,必须始终坚持以党的创新理论为指导,坚持以“两个结合”推动理论创新和实践创新,奋力谱写中国特色社会主义事业发展的新辉煌新篇章。