Design Strategies for Aqueous Zinc Metal Batteries with High Zinc Utilization: From Metal Anodes to Anode-Free Structures

Aqueous zinc metal batteries(AZMBs)are promising candidates for next-generation energy storage due to the excellent safety, environmental friendliness, natural abundance, high theoretical specific capacity, and low redox potential of zinc(Zn) metal. However,several issues such as dendrite formation, hydrogen evolution, corrosion, and passivation of Zn metal anodes cause irreversible loss of the active materials. To solve these issues, researchers often use large amounts of excess Zn to ensure a continuous supply of active materials for Zn anodes. This leads to the ultralow utilization of Zn anodes and squanders the high energy density of AZMBs. Herein, the design strategies for AZMBs with high Zn utilization are discussed in depth, from utilizing thinner Zn foils to constructing anode-free structures with theoretical Zn utilization of 100%, which provides comprehensive guidelines for further research. Representative methods for calculating the depth of discharge of Zn anodes with different structures are first summarized. The reasonable modification strategies of Zn foil anodes, current collectors with pre-deposited Zn, and anode-free aqueous Zn metal batteries(AF-AZMBs) to improve Zn utilization are then detailed. In particular, the working mechanism of AF-AZMBs is systematically introduced. Finally, the challenges and perspectives for constructing high-utilization Zn anodes are presented.

PHUI-GA: GPU-based efficiency evolutionary algorithm for mining high utility itemsets

Evolutionary algorithms(EAs)have been used in high utility itemset mining(HUIM)to address the problem of discover-ing high utility itemsets(HUIs)in the exponential search space.EAs have good running and mining performance,but they still require huge computational resource and may miss many HUIs.Due to the good combination of EA and graphics processing unit(GPU),we propose a parallel genetic algorithm(GA)based on the platform of GPU for mining HUIM(PHUI-GA).The evolution steps with improvements are performed in central processing unit(CPU)and the CPU intensive steps are sent to GPU to eva-luate with multi-threaded processors.Experiments show that the mining performance of PHUI-GA outperforms the existing EAs.When mining 90%HUIs,the PHUI-GA is up to 188 times better than the existing EAs and up to 36 times better than the CPU parallel approach.

Branched fibrous amidoxime adsorbent with ultrafast adsorption rate and high amidoxime utilization for uranium extraction from seawater

Direct collection of uranium from low uranium systems via adsorption remains challenging.Fibrous sorbent materials with amidoxime(AO)groups are promising adsorbents for uranium extraction from seawater.However,low AO adsorption group utilization remains an issue.We herein fabricated a branched structure containing AO groups on polypropylene/polyethylene spun-laced nonwoven(PP/PE SNW)fibers using grafting polymerization induced by radiation(RIGP)to improve AO utilization.The chemical structures,thermal properties,and surface morphologies of the raw and treated PP/PE SNW fibers were studied.The results show that an adsorptive functional layer with a branching structure was successfully anchored to the fiber surface.The adsorption properties were investigated using batch adsorption experiments in simulated seawater with an initial uranium concentration of 500μg·L^(−1)(pH 4,25℃).The maximum adsorption capacity of the adsorbent material was 137.3 mg·g^(−1)within 24 h;moreover,the uranyl removal reached 96%within 240 min.The adsorbent had an AO utilization rate of 1/3.5 and was stable over a pH range of 4–10,with good selectivity and reusability,demonstrating its potential for seawater uranium extraction.

Healthy function and high valued utilization of edible fungi

Edible fungi are large fungi with high added value that can be utilized as resources.They are rich in high-quality protein,carbohydrate,various vitamins,mineral elements and other nutrients,and are characterized by high protein,low sugar,low fat and low cholesterol.In addition,edible fungi contain a variety of bioactive substances,such as polysaccharides,dietary fiber,steroids,polyphenols,and most of these compounds have antioxidant,anti-tumor and other physiological functions.This review comprehensively discusses the bioactive components and functional characteristics of edible fungi(such as antioxidant,anti-aging,hypolipidemic activities,etc.).Then the recent developments and prospect in the high-valued utilization of edible fungi are discussed and summarized.The objective of this review is to improve the understanding of health-promoting properties of edible fungi,and provide reference for the industrial production of edible fungi-based health products.

Rice with high K utilization efficiency

China is short of potassium resources, it only produces about 30 t of potash fertilizers per year. While China used about 650 t of potash fertilizer in 2000 by importing more than 95% of its potash fertilizers from Canada or Europe. So, using varieties with high K utilization efficiency was very important.

Utilizing Dominant Early Maturity Genes of Sterile Line UP-3s in Hybrid Rice Breeding to Avoid High Temperature Season

A new sterile line UP-3s, which carries the Dominant Early Maturity Gene (DEMG), was bred on the farm of University of Arkansas at Pine Bluff (UAPB). UP-3s and two check sterile lines, Jin23-A and Xie-A which do not carry the Dominant Early Maturity Gene, were crossed with a group of different maturity restorer lines, PB-1R, PB-5R,PB11, PB-13R, PB-20, PB-21, PB-22R, and PB-23R. Eighteen new hybrid rice combinations of these crosses were then tested at UAPB in 2012 and 2013. The results showed that panicle differentiation (PD) of hybrids from female parent UP-3s (DEMG) crossed with the 8 male parents, were earlier than the hybrids from female parent Jin23-A or Xie-A crossed with the 8 male parents. The PD of these earlier hybrids was before Jun 25 and heading was before July 20. Early PD and heading avoided the high temperature (over 34&degC) period which usually occurs after July 20 in Arkansas. The yields of these earlier maturity hybrids with female parent UP-3s were higher than those of the late maturity hybrids thatwereF1 progeny of sterile lines Jin23-A or Xie-A (these two female parent checks with non-DEMG). These results showed that the DEMG sterile line UP-3s can be adopted in making crosses with later maturity restorer lines to obtain earlier maturity hybrids to avoid the high temperature period in Arkansas.

American glabrous rice utilized in breeding of super-high-yielding and good-quality varieties

The yield potential of current rice varieties has reached a high plateau and fluc-tuated within a narrow range. Based on the theory and practice of rice breedingfor super-high-yield, we put forward a concept of " Two high and one early",which means high biomass and high efficiency of light energy conversion, as wellas fast growing in the early growth stage. The agronomic characters of 15 U. S

Present Situation and Prospective of Camellia Nut Shells Utilization

With the rapid development of Camellia oleifera industry, more and more Camellia nut shells have been produced, leading to serious environmental pollution problem. This paper reviews the works on the characterization of the physical and chemical properties of Camellia nut shells, active ingredient extraction, its application in chemical production, growing media and animal feed and its properties as a biomass. Based on the review, we proposed a novel all-component high value application strategy to covert camellia nut shells into high value biomasses, which could realize waste recycling and environmental protection.

煤矸石资源化利用现状与进展

在实现“碳达峰与碳中和”目标的背景下,煤炭作为国家能源安全的基石,其绿色开发对我国经济建设和社会发展起到了至关重要的作用。然而,在煤矿开采及分选加工过程中,煤矸石作为煤炭主要伴生副产物,已成为我国急需处理的大宗固废之首。然而,目前煤矸石的综合利用率仍处于较低水平,尚未形成较为规范可行的研究体系。因此,针对煤矿开采与煤矸石堆积所造成的水、大气与土壤环境污染问题,通过煤矸石在生产能源、有价金属回收、建筑材料生产与其他方向的资源化利用的相关研究进展,结合煤矸石在防止重金属污染、土壤修复、防止水土流失等方面的应用,最后提出了煤矸石资源化利用未来的发展方向,根据整体进行规划与资源整合,不仅有大量用于常规目的的煤矸石资源化利用方向,同时还有用于生产高附加值产品的特殊用途,通过两者相结合,实现煤矸石的综合化和资源化利用,为其“减量化、资源化、循环化”发展提供借鉴。总之,煤矸石资源化利用是我国煤炭产业转型升级的重要方向,也是实现绿色可持续发展的必由之路。只有通过不懈的努力和持续的创新,才能更好地解决煤矸石堆积问题,推动煤矸石资源化利用向更加高效、环保、可持续的方向发展,为我国经济社会可持续发展做出更大的贡献。

基于滑动窗口含负项的高效用模式挖掘

针对传统高效用模式挖掘均未考虑项的效用值为负,以及对流数据处理的时效性问题,提出一种基于滑动窗口的高效用挖掘算法HUPN_SW。利用一种新定义的滑动窗口正负效用列表PNSWU-List,维护挖掘最近批次高效用模式集所需的所有信息,实现有效的逐批次挖掘,避免重复的数据库扫描,在不产生候选效用模式集的情况下,直接挖掘出高效用模式,使HUPN_SW有效适应于动态流数据。实验结果表明,HUPN_SW算法在运行时间和可扩展性方面有良好表现。

高潜水位采煤沉陷区资源化、能源化、功能化利用构想与实践

高潜水位矿区井工开采往往造成地表大面积沉陷积水,矿区生态环境发生变化,沉陷区国土资源由以土地资源为主转变为水资源为主、水土资源共存的局面。目前,采煤沉陷区水资源开发利用不充分,可再生能源开发、多能互补利用和废弃矿井抽水蓄能等方面具有得天独厚的条件和巨大发展潜力,采煤沉陷区国土空间功能也需结合现有条件重新定位与建构。在此背景下,提出高潜水位采煤沉陷区资源化、能源化和功能化利用构想。系统阐述了“三化”面临的科学问题,如采煤沉陷水域水资源量和水生态环境演变规律、地表残余变形规律;“三化”涉及的关键技术与模式,包括监测与评价技术,如“天-空-地-水-井”一体化协同监测技术体系、采煤沉陷区水生态环境调查评价方法、采煤沉陷区建设场地地基稳定性评价方法,以及治理利用技术及模式,如采煤沉陷区水生态环境修复技术模式、采煤沉陷区水资源保持与高效利用技术模式、水资源区域协调开发与高效利用技术模式、风光互补模式、制氢-合成氨-掺氨燃烧发电模式、废弃矿井抽水蓄能模式、农业用地功能构建(复垦地土壤重构)技术、建设用地功能构建(采空区注浆地基加固)技术、生态用地功能构建(地表水系重构与生态湿地建设)技术;并从产业融合、资金筹集、科技创新、区域统筹等方面提出了具体的政策建议。

施氮量对优质稻G优325氮肥利用率和产量的影响

【目的】探明优质杂交籼稻新品种G优325的适宜施氮量。【方法】设5个施氮量处理(0、60、120、180和240 kg/hm^(2),分别记为N0、N60、N120、N180和N240)进行田间试验,研究不同施氮量对G优325主要生育时期茎糵数、干物质积累与转运能力、氮肥吸收利用率和产量及其构成因素的影响。【结果】适当增加施氮量能显著提高G优325的产量,且在N180处理下产量最高。施氮量对产量构成因素、茎蘖数和干物质积累总量影响显著,随着施氮量增加,G优325成熟期的有效穗数、每穗总粒数和干物质积累总量均表现为先增加后降低的趋势,且有效穗数和干物质积累总量均在N180处理达到最高值,而每穗粒数在N120处理最多。随着施氮量增加,抽穗前后的干物质积累向籽粒的转运量均表现为处理N180>N240>N120>N60>N0;拔节期、抽穗期和成熟期的氮素积累总量均表现为先增加后降低的趋势,且均在N180处理下最高;氮素干物质生产效率、氮素稻谷生产效率、氮素收获指数、氮肥吸收利用率、氮肥农学利用率、氮肥偏生产力和氮素生理利用率均表现为处理N0>N60>N120>N180>N240。【结论】适宜提高施氮量(180 kg/hm^(2)),可协同实现优质杂交籼稻新品种G优325高产与较高氮肥利用效率。

“双碳”背景下废弃生物质的高值化利用研究

以废弃棉花秸秆为原料,在500℃下热解制备了棉花秸秆活性炭(CSAC),并研究了对亚甲基蓝和酸性品红的吸附特性。同时,以CSAC为载体,采用水热法制备ZnO/CSAC,并初步探索其光催化特性。结果表明:室温下,投加量为6,25 g/L,吸附60,90 min时,CSAC对200 mg/L模拟亚甲基蓝和酸性品红废水的脱色率分别为99.66%和78.20%。对两种染料的吸附过程都更符合准二级动力学,受化学吸附控制,且为放热过程。可见光照射下,ZnO/CSAC的投加量为1 g/L,2 h时对200 mg/L亚甲基蓝的降解率可以达到91.20%。ZnO/CSAC中纳米ZnO呈二维片状组装成绒球状长在CSAC表面,活性反应点位增多,光催化性能良好。

“油-稻-稻”三熟制早熟冬油菜氮高效基因型及鉴定指标筛选

【目的】旨在筛选适宜“油-稻-稻”三熟制的氮高效早熟冬油菜基因型及其简易筛选指标。【方法】利用田间小区试验,选用了生育期185 d以下的的适宜“油-稻-稻”三熟制种植的14种早熟冬油菜基因型,进行正常施氮(N_(1))和不施氮(N_(0))处理。根据不同冬油菜基因型氮肥利用率(NUE)的差异,利用树状聚类分析进行分类,形成高、中、低3种氮效率基因型。同时通过逆向溯源的方法,观察分析3种氮效率基因型在不同氮水平条件下的产量构成、主要农艺性状、干物质积累及氮素吸收等方面的表现特征。总结分析出氮高效冬油菜基因型的一些简易判断的指标。【结果】不同氮效率基因型冬油菜在产量形成、主要农艺性状等方面存在显著差异。N1处理下成熟期早熟冬油菜的主要农艺性状的表型值和变异系数基本表现大于N0处理。因此,以N1处理下不同基因型的农艺性状表现作为不同氮效率基因型的鉴别标准。N1处理下,氮高效基因型比氮中效和氮低效基因型产量高、单株角果数多、每角粒数多、株高高、主花序长、一级分枝数多、角果密度高、各部位干物质积累量高、籽粒中氮含量高、氮肥偏生产力、氮肥农学效率、氮肥生理利用率和氮收获指数均较高。【结论】沣油737是适合南方“油-稻-稻”三熟制的氮高效早熟冬油菜;正常施氮条件下,成熟期较多的单株角果数与每角粒数,以及较高株高是判断早熟冬油菜氮高效基因型的简易指标。

某锂矿低温熟化—水浸提锂和提纯高纯石英新工艺

皖南低品位热液蚀变型锂矿Li_(2)O含量0.21%,属于新类型锂矿资源,主要矿物成分有长石、石英、白云母、绿泥石,锂主要以晶格形式赋存于锂绿泥石中。新工艺采用-1 mm原矿筛分,+0.425 mm粒级进入磨矿,制备-0.425+0.074 mm合格粒级。脱泥后合格粒级产品经磁选得云母精矿,非磁性物浮选得到长石精矿和石英精矿,长石精矿和云母精矿分别进行提锂,石英精矿进行酸处理提纯得高纯石英。将原矿筛出的-0.074 mm细泥、再磨产生的-0.074 mm细泥、合格粒级搅拌擦洗产生的-0.074 mm细泥,合并为总泥进行后续提锂。试验结果表明:总泥、云母、长石分别采用低温熟化—水浸工艺提锂,累计得Li_(2)O浸出率88.78%,酸浸后石英精矿含SiO_(2)99.942%,Fe 4.38 mg/kg,达到高纯石英低端产品要求,提锂后的长石和云母浸渣产率54.48%,可用于建筑材料。浸出前后样品的XRD和SEM分析表明,硫酸低温熟化破坏了锂绿泥石晶格结构,H+代替锂绿泥石中Li+,将锂释放出来。新工艺降低了磨矿成本,锂浸出率高,兼顾云母、石英、长石的回收,减少了尾矿排放,提高了低品位热液蚀变型锂矿的综合利用水平。

两种商品化培养液的辅助生殖结局比较

目的探讨不同商品化培养液对体外培养胚胎的临床结局和出生结局的影响。方法回顾性分析2020年1月至2021年10月符合纳入标准的1540个取卵周期的患者临床资料,根据使用不同商品化培养液进行分组,其中Vitrolife组有831个周期,Cook组有709个周期,比较分析两组的体外胚胎发育情况和临床结局。结果Cook组的D3优质胚胎率(69.63%vs.67.54%)、囊胚形成率(53.47%vs.49.01%)、可利用囊胚形成率(46.72%vs.42.70%)和D5可利用囊胚形成率(35.03%vs.30.32%)均高于Vitrolife组,差异有统计学意义(P<0.05);两组之间的其余体外胚胎发育情况、临床结局和新生儿出生结局比较,差异无统计学意义(P>0.05)。结论本研究提示在常规体外受精和胚胎移植周期中,培养液可能影响体外培养胚胎的优质胚胎和囊胚的形成。

农作物秸秆资源化利用问题及发展策略研究

分析了我国现阶段农作物资源化利用存在的附加值低、农户积极性不高、筹资难、农业机械化发展不均衡、人才缺乏等问题,研究适合我国农作物秸秆资源化利用的发展策略及措施,以推动我国农作物秸秆资源化利用。

有机硅高沸物催化裂解技术进展

催化裂解技术可高效低能耗地资源化处理利用有机硅高沸物,有机硅高沸物催化裂解技术根据所用催化剂不同可分为氯化铝基催化裂解技术、有机胺基催化裂解技术、钯磷配位化合物基催化裂解技术、磷酸盐基催化裂解技术、过渡金属及其化合物基催化裂解技术、分子筛和活性炭基催化裂解技术等。对这些技术的特点、发展现状和趋势进行了研究,为有效利用这些技术对有机硅高沸物通过催化裂解实现资源化处理利用提供技术支持。研究表明,有机胺基催化裂解技术相对其他技术具有其他技术无可比拟的技术优势,是未来有机硅高沸物催化裂解技术发展的一个趋势和热点。

一种有效的周期高效用序列模式增量挖掘算法

周期高效用序列模式挖掘(PHUSPM)因其能够发现时间序列中更具实际价值的规律性模式而备受关注,但现有的PHUSPM算法难以有效地处理数据集的增量更新,且未考虑大规模数据下算法的向下闭包性和复杂性。针对该问题,提出了IncPUS-Miner算法,有效地实现了周期高效用序列模式(PHUSPs)的增量挖掘。IncPUS-Miner引入了一种名为pu-tree的新型数据结构,每个树节点对应一个更新效用列表(UUL)用于存储相应序列的辅助信息,当有增量数据加入时,该结构使得项目信息能够灵活更新,从而增强了算法的动态适应性和可扩展性。此外,还提出了两种新的序列效用上界PUB和EUB,以及两种相应的剪枝策略,有效地减少了计算负担。实验结果表明,在真实数据集上,IncPUS-Miner算法可以有效地增量挖掘PHUSPs,与其他算法相比,在运行效率和内存消耗上展现出了优越的性能。